Method Statements for Test Pile of Access Trestle andCoal Unloading Jetty

Comment Response Sheet (CRS)
Project Title

Van Phong 1 BOT Thermal Power Plant Project

Document Title

Method statements for test pile of Coal Unloading
Jetty

Document Type

For Approval

Document No

VP1-0-L4-C-GEN-10014

Returned Status

AC

Prepared by

CRS No

VP1-0-L4-C-GEN-10014-D-CRS

CRS Issued Date

08/05/2020

Engineer

No.

1

Section
/ Page
1

Owner’s Comment

Response to Comment

04/02/2020
The Contractor shall verify pile designs by installing
preliminary piles or by using permanent piles to:
• Review and check the pile lengths necessary to
satisfy the Contractor’s design;
• Assess the skin friction and end bearing
components of soil resistance;
• Calibrate pile dynamic testing against static test
results;
• Calibrate pile dynamic driving formula against static
test results, hammer types and settings and hammer
energy delivered to the pile as obtained from
dynamic testing;
• Review the Contractor’s pile installation method.
Those purpose of preliminary piles test shall be

incorporated in this MS, and the report should clearly
mentioned result of each above items.

26/02/2020
DHI confirmed that pile designs will be verify by
preliminary pile

Review
Date

Status O/C *

06/03/2020

C

L4
Project

Remarks

06/03/2020
Closed

Page 1 of 31


Comment Response Sheet (CRS)
2

1

04/02/2020
General comment:
Please describe who are from DHI's EHS team
reviewed this document? It seems no one from EHS
team has been reviewed this document, Please
make sure that VPCL is not Doosan's consultant

26/02/2020
The EHS team of DHI reviewed this document

06/03/2020

C

06/03/2020
Closed

Page 2 of 31


Comment Response Sheet (CRS)
3

1

04/02/2020
(1) Number of test piles, locations and theoretical
bearing capacity calculation to be provided.

06/03/2020
(1) Noted.
10/04/2020
(1) Cal for Prelim test pile. Coal Unload
Jetty&Access Trestle still not approved.
04/02/2020
(2) Item 3.2 manpower: Accuracy of test results are
critical then Cvs/experiences and qualified certificate
of key persons be shown.
(4) item 5.1: Provide reference for 100% and 200%
DWL. And no tensile and lateral test carried out be
subject to approval by the VPCL.
(5) item IV. Pile driving: pile driving stop criteria not
clear. Noted that refusal paper use for piling record
should be applied to see the rebounce during final
blows.
06/03/2020
(2) Noted
(4) Noted
(5) Noted
04/02/2020
(6) Item 5.5.2: in case load reach to the maximum
test load but total displacement still not reach to 10%
pile diameter, continue loading to be asked. Please
describe more.

26/02/2020
(1) Number of test pile, locations and theoretical
bearing capacity calculation is shown in
attachment 01, 02

06/03/2020

C

10/04/2020

O

(2) Test will be done by laboratory staff whom
has been got approved by document No. VP1MOC-003

06/03/2020

C

(4) Reference for 100% and 200% DWL is
shown in attachment 02 Testing pile work and
due to TCVN 9393:2012
(5) This comment will be clearly by construction
drawing and method for pile driving which will be
submitted by separate document.

06/03/2020

C

29/04/2020
VP1-0-L4-C-UZR-05700 Calculation prelim
TEST PILE, COAL UNLOADING JETTY AND

ACCESS TRESTLE has been approved by 16
April

06/03/2020

(6) In case of load, DHI will be carried out
following the ASTM D1143M
06/03/2020

C

O

06/03/2020
(6) termination of loading: when load up to maximum
test load but total displacement still not reach the
ultimate 10% of pile diameter, it is recommended
that to increase load to the failure to estimate actual
Page 3 of 31


Comment Response Sheet (CRS)
pile bearing capacity. (origin of 15 % pile diameter?)
Noted: with reference to TCVN, failure load is
recommended to take 250%- 300% Ptk for test pile
and 150 %-200% for test of working pile.

31/03/2020
DHI has updated load up to 250% and revised
on this MS (rev c)

10/04/2020
(6) Noted and subject to approval of VPCL.
(7) This MS cannot used for site construction since
there does not support information for quality control
of site welding for steel pile connection (if applied) as
well as detail measurement of rebound value as per
approved calculation.
4

2

04/02/2020
There is no attachments was found in this MS

29/04/2020
Test pile material shall not weld at site. Rebound
measurement shall be conducted by total station
machine/ leveling machine, Rebound record has
been mention on ITP

26/02/2020
DHI has added the attachment to the MS Rev B

10/04/2020

C

10/04/2020

O
Closed.

06/03/2020

C

06/03/2020
Closed

Page 4 of 31


Comment Response Sheet (CRS)
5

2

04/02/2020
- Clarify the sequence of piling test: when will start
axial static test and PDA test? Which one is previous
test?

26/02/2020
- The PDA test shall be performed first then axial
static test shall be performed

06/03/2020

C

06/03/2020

C

06/03/2020
Closed

04/02/2020
- Add the pile arrangement plan; and explain how
shall the pile testing result be applied for determine
length of pile group in plan
- Based on result of Test, the Contractor propose the
another formula (for example Hiley formular) or
conventional pile refusal method to identify the pile
bearing capacity without PDA test or axial static
loading test that is important during mass piling work
period. This matter should incorporate in "Piling
Criteria" document for review and approval before
start driving permanent piles.

26/02/2020
- Pile arrangement plan is shown on MS for
Pilling work and the pile testing result will be
sent to design team for decision of mass pile.
- DHI will note this issue

06/03/2020
Closed

26/02/2020
- According to calculation sheet what mention in
attachment 02 the tension tests no need to carry
out
02/04/2020
According to Section 9.8.4.6 of technical
Specification about Pile testing where is
describing the requirement for Marine work, and
Contractor considered such requirement of
contract.

04/02/2020
- Axial static pile test should be performed for both of
compression and tensile that depend on design
(If pile foundation is under high horizontal force; it is
also considered horizontal load test)
06/03/2020
Open:
Please provide more clear explanation and review
Part III-2 Exhibit B1 Tech Spec Section 8, item 8.8.2
Piling

06/03/2020
10/04/2020

O
C

10/04/2020
Closed

Page 5 of 31


Comment Response Sheet (CRS)
04/02/2020
- Add the introduction of construction structure;
specially geology condition at pile test location;
- Pile test location is at opened sea; therefore, the
working condition should be insisted clearly (wave,
wind, current,) in order to ensure the high quality of
test result and labour safety issues

6

3

06/03/2020
Closed
04/02/2020
No horizontal load test for vertical pile and raking
pile?
06/03/2020
Not agree, attachment 2 show the calculation of
reaction pile, not test pile.

7

3

10/04/2020

Closed
04/02/2020
The Testing loads for test pile shall be in accordance
to maximum Pile bearing capacity in pile design.
Contractor to submit Pile design calculation report
06/03/2020
Open, it is not the calculation of bearing capacity of
test pile

26/02/2020
- DHI has revised content of this MS, this
comment will be clearly on pile driving method
which will be submit in separate document.
- DHI has revised content of this MS, this
comment will be clearly on pile driving method
which will be submit in separate document.

26/02/2020
According to calculation sheet for testing pile
what mention in attachment 02 the tension tests
no need to carry out
02/04/2020
In calculation structure for piling work, the
displacement and bending moment of piles have
a limitation not exceed the allowable value,
therefore the lateral load test for single pile is not
necessary
Test scheme is explained in VP1-0-L4-C-UZR05700_A_CALCULATION FOR PRELIMINARY
PILE TEST.
26/02/2020

DHI has submitted the calculation (refer to
attachment 02) which was mention pile bearing
capacity.
02/04/2020
Test load is determined based on calculation
structure for Coal Unloading Jetty which mention
in document No. VP1-0-L4-C-UZR-05001.

06/03/2020

C

06/03/2020

O

10/04/2020

C

06/03/2020

O

10/04/2020

C

08/05/2020

C

10/04/2020
Closed,
However the test load should be refer to document
no. VP1-0-L4-C-UZR-05700 which pile load capacity
calculated base on soil condition.
Page 6 of 31


Comment Response Sheet (CRS)
8

9

3

3

04/02/2020
Refer to related document for Access trestle and
Coal Unloading Jetty such as design calculation,
drawing, method, MAR, third-party for Testing
information, ...
06/03/2020
Closed
04/02/2020
- Add the standard TCVN 9393:2012 Pile – Standard
test method in situ for piles under axial compression
load

- Add the standard TCVN 11321:2016 Pile high
strain dynamic testing for reference
- Add the standard TCVN 9394:2012 Pile driving and
static jacking works – Construction, check and
acceptance for reference.
- Add the standard TCVN 10304:2014Pile foundation
– Specification for reference
- Add the standard TCVN 9245:2012 Steel pipe pile
- Add TCVN 10318: 2014 Steel pipe piles and steel
pile sheet pile for port harbor – Specification for
construction and acceptance;
- Add TCVN4253:2012 Hydraulic structures –
Foundation of hydraulic projects – Design standard
- Add TCXD 88: 1982 Pile method of site testing

26/02/2020
DHI has revised and updated on MS Rev B
(Section 1.6)

06/03/2020

C

26/02/2020
DHI has revised and updated on MS Rev B
(Section 1.6)

06/03/2020

C

06/03/2020
Closed

Page 7 of 31


Comment Response Sheet (CRS)
10

3

04/02/2020
Please clarify what is this equipment definition based
on Vietnam Maritime Code No 95/2015/QH13 and
decree No 171/2016/ND-CP, are there any other
specifications, standards, regulations for this
equipment, please mention for our information and
supervision? How to know structural platform with
the hammer assembled fit with the barge? Are there
any confirmation from authority?
06/03/2020

26/02/2020
In this case, DHI has got confirmed with
Authority that all document relation with each
equipment definition base on Vietnam Maritime
require which mention on 95/2015/QH13 and
decree No 171/2016/ND-CP

06/03/2020

O

10/04/2020

C

06/03/2020

C

06/03/2020

C

02/04/2020

OPEN

please clarify what is this equipment (Watercraft,
floating warehouse, movable platform or floating
dock) based on on Vietnam Maritime Code No
95/2015/QH13? How to know structural platform with
the hammer assembled fit with the barge? Are there
any confirmation from authority? Please reflect it
detail in this document as it it an integral part for site
implementation and supervision.

11

3

10/04/2020
Closed
04/02/2020
Please provide more detail equipment such as
leader length of piling barge, capacity of crane on
barge.
How about drilling machine, drilling barge?

Base on Vietnam Maritime Code No
95/2015/QH13, Equipment for piling work is
movable platform.
structural platform with the hammer is shown in
the verification certification of Phu Xuan 17
which is submitted when equipment is delivered
to the site.

26/02/2020
Detail equipment shall be provided on
certification when equipment’s are mobilized to
the site
DHI has updated Drilling machine and barge to
MS Rev B (Section III)

06/03/2020
Closed
13

4

04/02/2020
Do you (Subcontractor & DHI) dispatch any HSE
guys to supervise this activity?

26/02/2020
DHI will dispatch HSE to supervise this activity

06/03/2020
Closed
Page 8 of 31


Comment Response Sheet (CRS)
14

15

16

4

4

4

04/02/2020
Basically, the number of test pile with exactly
location, estimated pile length, tip elevation, cut off

elevation should be designed and calculation first.
Base on the design and soil condition, the Contractor
will propose pile driving method and testing
procedure to verify the calculation and decide the
final pile length.
06/03/2020
Closed
04/02/2020
Clarify recommended for use only “Driving method
by diesel hammer machine will be applied” for
Access trestle, no use “Driving – drilling – driving
method”? (In the Details of test pile-Page 8, Length
of Pile test for Access trestle (50m) is longer than
Wharf (42m)
06/03/2020
Closed
04/02/2020
Any plan to prevent oil spread to the sea due to
diesel hammer is quitted challenge during pile driving
for environmental issue?

06/03/2020
OPEN. Please detail what document for information,
please be noted that the oil can spread to the sea in
the time of test pile work due to diesel hammer so
the the oil spreading prevention must be submitted
pertaining to this method statement,
This are also one part of mitigation environmental
control, please do not separate out of this document

26/02/2020
Well note, this comment will be mention clearly
on the design document.

26/02/2020
Well note, this comment will be clearly on
method of pile driving which will be submitted on
separate document.

26/02/2020
Well note, this comment will be clearly on
method of pile driving which will be submitted on
separate document.
29/04/2020
DHI has revised and updated on MS Rev D –
Attachment 6
02/04/2020
DHI has mention on MS rev C (section 6.2,
please refer)

06/03/2020

C

06/03/2020

C

06/03/2020

O

10/04/2020

O

10/04/2020

C

10/04/2020
Closed

Page 9 of 31


Comment Response Sheet (CRS)
17

18

19

20

4

4

4

5

04/02/2020
Pulling force act on Pile of Access trestle or not?

26/02/2020
Pulling force not act on pile of Access trestle

06/03/2020
Open
Please provide evident

02/04/2020
Please refer to calculation for Access Trestle
No. VP1-0-L4-C-UZL-05002 which has been
submitted to Owner in separate document.

10/04/2020
Closed
04/02/2020
Please be noted that, according to "Part III-2 Exhibit
B1 Tech Spec Section 9, item 9.8 Piling", one of
purpose for installation preliminary piles is to review
the Contractor's pile installation method. In case the
Contractor's proposed method is not suitable or fail,
the Contractor shall propose other driving method for
review and approval
06/03/2020
Closed

04/02/2020
The Contractor shall keep complete and accurate
pile driving records in a standard format with all
necessary information to verify the design calculation
06/03/2020
Closed
04/02/2020
Is this for Access Trestle pile ?
06/03/2020
Closed

21

5

04/02/2020
Is this for Jetty pile ?
06/03/2020
Closed

26/02/2020
DHI has noted this case

26/02/2020
DHI has noted, and this comment will be clearly
on method of pile driving which will be submitted
on separate document.

26/02/2020
This work for all pile which should be braced

after first driving and this comment will be clearly
on method of pile driving which will be submitted
on separate document.
26/02/2020
This work for all pile which after second driving
should be braced for cut-off pile head and this
comment will be clearly on method of pile driving
which will be submitted on separate document.

06/03/2020

O

10/04/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

Page 10 of 31


Comment Response Sheet (CRS)
22

23

24

25

5

04/02/2020
Lack of anchoring pile driving, reaction beam system
installation
Design and calculation of anchoring pile also
necessary to included.

26/02/2020
DHI has revised and updated on MS Rev B
(Attachment 02)

5

26/02/2020

DHI has revised and updated on MS Rev B
(section 1.4)

5

06/03/2020
Closed
04/02/2020
There is no step of assemble the steel pile into the
head of the hammer, please describe this step with
safety countermeasure

26/02/2020
The step of assemble the steel pile into the head
of hammer is shown in MS for pilling work which
will be submitted in separately document.

06/03/2020

02/04/2020

OPEN. Please be noted that there is high risk step, it is not
acceptable if there is no safety countermeasure for this
step in test pile time

DHI has been revised in Attachment 03

5

C

06/03/2020

C

06/03/2020

O

10/04/2020

C

06/03/2020

C

Design and calculation of anchor pile is shown
Attachment 02

06/03/2020
Closed
04/02/2020
The Contractor to update all figure showing actual
pile test and anchor pile arrangement for clarity

10/04/2020
Closed
04/02/2020
drilling barge/ equipment should be mentioned in

equipment list

06/03/2020

26/02/2020
DHI has revised and updated on MS Rev B
(Section III)

06/03/2020
Closed

Page 11 of 31


Comment Response Sheet (CRS)
26

5

04/02/2020
How to make sure people working here are safe,
please describe detail this step and countermeasure

06/03/2020
OPEN.
VP1-0-L4-H-GEN-00003
is
common
document, its document request you to identify the
risk and safety countermeasure for this task.

27

28

29

6

6

6

06/03/2020
Closed
04/02/2020
Contractor to proof that the selection of hammer
12.8t is suitable for such D1000 steel pile.
Calculation should be submitted and attached in this
MS
06/03/2020
Closed
04/02/2020
How to bracing the test pile? If brace it to the anchor
pile, mean the anchor pile should be driven before?
please show the Bracing system and correct the
sequence.
06/03/2020
Closed
04/02/2020

- Please describe more detail the drilling method and
drilling device
- Please clarify, the soil and rock materials after
drilling, how to treat it?

26/02/2020
In case of safety, DHI will be implement work
following HSE detail manual for L4 via VP1-0L4-H-GEN-00003 which has been submitted to
Owner
02/04/2020
DHI has been updated in Attachment 03

26/02/2020
The calculation for hammer is shown in
attachment 02 Testing pile work and attachment
02.

26/02/2020
This step will be conducted for mass pile and will
be clearly on MS for pile driving which will be
submitted on separate document.

26/02/2020
DHI has revised content of this method, this
comment will be clear on pile driving method
which will be submitted on separate document.

06/03/2020

O

10/04/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

DHI has revised content of this method, this
comment will be clear on pile driving method
which will be submitted on separate document.

06/03/2020
Closed
Page 12 of 31


Comment Response Sheet (CRS)
30

31

32

6

04/02/2020
Please show the I steel system

6

06/03/2020
Closed
04/02/2020
Please show the method of cutting pile head, and
how to do it on site

7

06/03/2020
Closed
04/02/2020
Number of piles to be tested: Contractor to clarify the
2 preliminary piles are test piles of both wharf and
access bridge?
According to TCVN 10304-2014 Pile Foundation –
Design Standard, number of test pile is about 1% of
total pile, but not less than 2.
According the Clause 3.6-TCVN9393:2012Pile –
Standard test method in situ for piles under axial
compression load, number of pile test is normally

equal 1% total number of pile of jetty but no less than
2 piles.
Beside, because of long structure of wharf and
access bridge with much variation of soil data, the
number of test pile must be increased. Contractor to
recheck.

26/02/2020
DHI has revised content of this method, this
comment will be clear on pile driving method
which will be submitted on separate document.

26/02/2020
DHI has revised content of this method, this
comment will be clear on pile driving method
which will be submitted on separate document.

26/02/2020
Number of piles to be tested is shown in
attachment 02 Testing pile work.

06/03/2020

C

06/03/2020

C

06/03/2020

O

10/04/2020

C

02/04/2020
According to detail design Rev A for Coal Unloading
Jetty Total number of jetty’s pile is 317 piles and total
number of access trestle’s pile is 201 piles.
According to Section 9.8.4.6 of technical Specification
about Pile testing where is describing the requirement
for Marine work, and Contractor considered such
requirement of contract.

06/03/2020
Open
Please show the total number of jetty’s pile and total
number of access bridge’s pile; and explain that why there
is only 1 testing pile for jetty and 1 testing pile for access
bridge. And how shall the preliminary piles test result be
applied for estimation of mass pile?

10/04/2020
Closed

Page 13 of 31

Comment Response Sheet (CRS)
33

34

35

36

37

7

7

7

7

7

04/02/2020
What is meaning?
06/03/2020
Closed
04/02/2020
Stage loading?
06/03/2020
Closed
04/02/2020

Number of testing pile and testing pile location
should be distinguished between jetty and access
trestle;
06/03/2020
Closed
04/02/2020
What is this ?
06/03/2020
Closed
04/02/2020
Clarify Design Working Load (for the Wharf and
Access trestle)
06/03/2020
Open
Please clarify Design Load (4830 kN, 4050 kN in
section 1.3, page 3)

26/02/2020
DHI has corrected and revised on MS Rev B
(Section 4.1)

06/03/2020

C

26/02/2020
DHI has corrected and revised on MS Rev B
(Section 4.1)

06/03/2020

C

26/02/2020
DHI has revised and updated on MS Rev B
(Section 1.4)

06/03/2020

C

26/02/2020
DHI has corrected and revised on MS Rev B
(Section 4.1)

06/03/2020

C

06/03/2020

O

10/04/2020

C

26/02/2020
Design working load (for wharf and access
trestle) is shown in attachment 02 Testing pile

work and due to TCVN 9393:2012
02/04/2020
DHI has revised and updated on calculation for
preliminary test pile, coal unloading jetty and
trestles
VP1-0-L4-C-UZR-05700
(jetty
is
4800kN, and trestle is 3500kN)

10/04/2020
Closed

Page 14 of 31


Comment Response Sheet (CRS)
38

7

04/02/2020
Pile test performed before mass piling work so the
testing load should be equal 250-300% design
working load.
06/03/2020
Open
Please refer to Section 3.1, 3.2, 3.3 and 4.4.7 of
TCVN 9393: 2012

39

40

7

10/04/2020
Closed
04/02/2020
The Contractor to confirm that all compressive test
procedure is based on ASTM D1143M.

7

06/03/2020
Closed
04/02/2020
Tension working force may be much more when
Coal vessel berth abnormally, and then tension test
should be needed.
06/03/2020
Open
Please check what is attachment 2

10/04/2020
Closed

26/02/2020
According to TCVN 9393:2012, applied
250~300% design load for exploration pile. With

test pile is applied 150-200% design working
load.

06/03/2020

O

10/04/2020

C

test

06/03/2020

C

26/02/2020
According to attachment 02, tension test no
need to carry out

06/03/2020

O

10/04/2020

C

02/04/2020

DHI has revised and updated on MS for test pile
of access trestle and coal unloading jetty Rev C
(Testing load is equal 250% design working
load)

26/02/2020
DHI confirmed that all compressive
procedure is based on ASTM D1143M

02/04/2020
Based on Calculation for preliminary test pile,
Coal Unloading Jetty and access trestle No.
VP1-0-L4-C-UZR-05700, the tension working
force is too small (0kN with Trestle and 350kN
with Jetty), smaller than Pulling Resistance of
Pile (7226kN with Trestle and 1663kN & 2650kN
with Jetty).
DHI has revised and updated Attachment 02

Page 15 of 31


Comment Response Sheet (CRS)
41

7

04/02/2020
Clarify why tension test no need to carry out?
(Compression/tension and number of loading cycles

are as specified in the SPERW)
06/03/2020
Open
Add more explanation, no description in Appendix
02. Review Part III-2 Exhibit B1 Tech Spec Section
8, item 8.8.2 Piling

26/02/2020
According to attachment
02/04/2020
Based on Calculation for preliminary test pile,
Coal Unloading Jetty and access trestle No.
VP1-0-L4-C-UZR-05700, the tension working
force is too small (0kN with Trestle and 350kN
with Jetty), smaller than Pulling Resistance of
Pile (7226kN with Trestle and 1663kN & 2650kN
with Jetty).
DHI has revised and updated Attachment 02
Also based on Section 9.8.4.6 of technical
Specification about Pile testing where is
describing the requirement for Marine work, and
Contractor considered such requirement of
contract.

06/03/2020

O

10/04/2020

C

08/05/2020

C

10/04/2020
Closed
However Lot4 will be requested to carry out the
tensile strength test if the calculation of reaction
show enough internal tensile strength.

Page 16 of 31


Comment Response Sheet (CRS)
42

43

44

8

04/02/2020
- Contractor to correct the pile toe level of pile (01-E76) (+4.35-42.0m=-37.65m) and also carefully
correct the “,” and “.” showing in pile head and toe
level of pile 02-P40B.
- Add the pile arrangement plan; and mark the
position of 2 testing pile

- Clarify the co-ordinates of 2 testing piles (add the
survey angular, longitude, projection zone besides of
VN-2000 coordinate)
- Clarify that testing pile is 1 segment or 2 welded
segments;
- Pile Diameter 1000/16mm is the outside diameter
(or OD 1016mm).
- Propose to perform compression, tensile axial
static load and horizontal load

8

06/03/2020
Closed
04/02/2020
Position of test piles should be shown on drawing.
Please bring this information to the top of document.

8

06/03/2020
Closed
04/02/2020
Clarify Type of Pile STK 490?
Why it differs material spec: SKK490 in document
no. VP1-0-L4-Q-GEN-10009
06/03/2020
Open
Please correct remark in ATTACHMENT 01, Page
#21

26/02/2020
- DHI has revised content of this method, this
comment will be corrected on drawing design
which will be submitted on separate document

06/03/2020

C

26/02/2020
DHI has revised and updated on MS Rev B
(Section 1.4)

06/03/2020

C

26/02/2020
DHI has revised and updated on MS Rev B
(Section V.5.2) SKK490 due to JIS A5525

06/03/2020

O

10/04/2020

C

- The pile arrangement plan is shown in
Attachment 01
- DHI has updated on MS rev B (Section 1.4)

- Testing pile is 02 welded segments
- Pile Diameter 1000/16 is the outside diameter
- According to attachment 02, tension test no
need to carry out

02/04/2020
DHI has revised and updated on MS Rev C
(Attachment 01)

10/04/2020
Closed

Page 17 of 31


Comment Response Sheet (CRS)
45

46

47

48

49

50

8

8

8

8

9

10

04/02/2020
Please explain the below using drawings.

26/02/2020
The drawing is attached in Attachment 01

06/03/2020

C

06/03/2020
Closed
04/02/2020
No found in this MS

26/02/2020

DHI has attached on MS rev B (Attachment 02)

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020
Closed
04/02/2020
Contractor to explain “Total loading of reaction
system will be greater than 1012.8 tons”?
06/03/2020
Closed
04/02/2020

Contractor shows 04 anchor piles shall be used,
please note that number of anchor pile is calculated
basing on testing load and its bearing capacity.
Contractor to provide calculation sheet.
06/03/2020
Closed
04/02/2020
- Tolerance of calibrated displacement transducers?
- Capacity of calibrated displacement transducer
06/03/2020
Closed
04/02/2020
The image shows 8 anchor piles while 4 piles in subclause 5.3.2. Contractor to clarify
Provide the quantity table of reaction piles, reference
pile in detail (specification, elevation, location,...)

26/02/2020
DHI has revised and updated on MS Rev B
(Section V.5.3.2) and Refer to Attachment 2:
Calculation Sheet for testing pile

26/02/2020
DHI has revised and updated on MS Rev B
(Section 4.1) and Refer to Attachment 2

26/02/2020
- DHI has revised and updated on MS Rev B
(Section 4.1)
- Capacity of calibrated displacement transducer
is (0-100)mm

26/02/2020
DHI has revised and updated on MS Rev B
(Section 4.1)

06/03/2020
Closed

Page 18 of 31


Comment Response Sheet (CRS)
51

52

53

10

10

10

04/02/2020
Where is reference pile ?
06/03/2020
Closed
04/02/2020
- Add the figure of testing chart (including relevant
instrument and equipment: Beam and anchor

piles,…);
- Notice that the distance between anchor pile,
measurement equipment and testing pile must be
longer than the allowable distance
- Clarify the requirement of equipment that regarding
to working pressure.
06/03/2020
Closed
04/02/2020
- Mention clearly the value of 483T design bearing
capacity (compression or tensile, include or exclude
safety factor)?
06/03/2020
Open
Provide basis for reference, including: criteria design,
design document of jetty and access bridge.

54

10

10/04/2020
Closed
04/02/2020
This document should be submitted in timely manner
in order to finalize this MS

26/02/2020
DHI has revised and updated on MS Rev B
(Section 1.4)

06/03/2020

C

26/02/2020
- DHI has mention at work sequence on MS rev
B (Section 1.5)

06/03/2020

C

06/03/2020

O

10/04/2020

C

06/03/2020

C

- Noted

- DHI has revised and updated on MS Rev B
(Section 3)

26/02/2020
It has mention on attachment 02, the value 483T
design bearing capacity include safety factor.

02/04/2020
DHI updated this information based on
calculation for test pile, coal unloading jetty and
access trestle No. VP1-0-L4-C-UZR-05700
which has been submitted to Owner in separate
document
26/02/2020
Noted, please refer to attachment 02

06/03/2020
Closed

Page 19 of 31


Comment Response Sheet (CRS)
55

56

57

58

59

60

10

04/02/2020
step by step ?

26/02/2020
Yes, it was step by step

10

06/03/2020
Closed
04/02/2020
The load/unloading interval and each requirement
must follow Section 8. Procedure – ASTM D1143M.
Contractor to confirm.

26/02/2020
The
load/unloading
interval
requirement will be followed
Procedure – ASTM D1143M.

10

06/03/2020
Closed

04/02/2020
Clarify the basis of increasing and reducing loading
level and its period?

11

06/03/2020
Closed
04/02/2020
Time interval between pile installation and testing:
The piles shall be tested 7 days after installation

26/02/2020
DHI confirmed that the piles shall be tested 7
days after installation

11

06/03/2020
Closed
04/02/2020
How to control the displacement of beam (according
to TCVN 9393:2012, the displacement of beam is not
higher than 1/200L);

26/02/2020
Base on calculation for beam (Attachment 02),
the displacement of beam is not higher than
1/200L

11

06/03/2020
Closed
04/02/2020
Contractor to add the condition: “Pile material is
damaged”.

26/02/2020
DHI has revised and updated on MS Rev B
(Section 4.1)

and
each
Section 8.

26/02/2020
The basic of increasing and reducing loading
level and its period base on TCVN 9393:2012
and ASTM D1143M

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020
Closed

Page 20 of 31


Comment Response Sheet (CRS)
61

62

63

11

12

12

04/02/2020
According to ASTM D1143M, The settlement of pile
beyond the limit of 15% diameter piles, the testing is
terminated. Contractor to check.

26/02/2020
DHI has revised and updated on MS Rev B
(Section 4.1)

06/03/2020

C

06/03/2020
Closed
04/02/2020
Make clear the waiting time of project: at least 7 days
in general (Page 12); at least 7 days for piles into
clay layer and at least 3 days for piles into sand layer
(Page 16)

26/02/2020
DHI confirmed that the piles shall be tested 7
days after installation

06/03/2020

C

06/03/2020
Closed
04/02/2020
Remind (based on Specification):
The Contractor may select any Working Pile for
dynamic load testing up to a total number of 2% of
piles.

26/02/2020
Frequency of Dynamic load testing for mass pile
will be followed specification’s project.

06/03/2020

O

10/04/2020

C

06/03/2020

C

06/03/2020
Open
Provide basis for reference, including: criteria design,

design document of jetty and access bridge.

02/04/2020
based on calculation for test pile, coal unloading
jetty and access trestle No. VP1-0-L4-C-UZR05700 which has been submitted to Owner in
separate document

10/04/2020
Closed
04/02/2020
The results of static and dynamic load tests will be
used to correlate pile driving sets calculated from pile
driving formula, and to establish criteria for the
remaining driving operations. Subsequent dynamic
tests may be used to adjust these criteria.

26/02/2020
Noted

06/03/2020
Closed

Page 21 of 31


Comment Response Sheet (CRS)
64

65

66

67

13

14

17

18

04/02/2020
- Add “Impact Equipment”, according to the TCVN
11321:2016 Drop weights have a mass of at least
1% to 2% of the required load capacity of the pile
- Add “The tests shall be sufficient to mobilise the
full pile resistance and cause a permanent net
settlement of at least 2mm after one impact of the
piling hammer”
06/03/2020
Closed
04/02/2020
Chart?
06/03/2020
Closed
04/02/2020
Provide organization chart of safety department and
responsibilities of each position for test pile
06/03/2020

Closed
04/02/2020
Is that enough?

26/02/2020
DHI has revised and updated on MS Rev B
(Section 4.2)

26/02/2020
DHI has corrected and deleted it on MS rev B

26/02/2020
Organization chart of safety department is
included with site organization chart which
mention at Section II of MS rev B

26/02/2020
DHI has revised and updated on MS Rev B
(Section 6.1.5)

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020
Closed

Page 22 of 31


Comment Response Sheet (CRS)
68

18

04/02/2020
Please describe how to manage environment
pollution during this activity (How to detail handling,
storing, collecting, and treating of waste generation
(including domestic, construction, and hazardous
waste)

26/02/2020
DHI will be conducted based on HSE detail
manual for L4 via VP1-o-L4-H-GEN-00003
which has been submitted to Owner

06/03/2020

C

06/03/2020

C

06/03/2020

C

06/03/2020
Closed
04/02/2020
Please describe detail emergency response
preparedness plan in this activity (Which is included
emergency equipments....)?

26/02/2020
DHI has revised and updated on MS Rev B
(Section 6.1.2)

06/03/2020
Closed
69

18

04/02/2020
1. Eyes protection?

2. Life jacket?
Please clarify for each job (Hot job, Working at
height...)

26/02/2020
DHI will be conducted based on HSE detail
manual for L4 via VP1-o-L4-H-GEN-00003
which has been submitted to Owner

06/03/2020
Closed

Page 23 of 31


Comment Response Sheet (CRS)
70

18

04/02/2020
1. Provide lifting plans as follows:
- What crane? Capacity?
- Load chart (Must be clearly marked)
- List of load (Pile...)
- List of lifting gear (Capacity)
- Drawings showing the working radius and lifting
area (Lifting from where to where)
- Tension force of wire rope according to the angle of
lifting

- Inspection checklist for Crane and lifting gear
- List of manpower and their certificates
- Profile, 3rd party certification for crane and lifting
gear

26/02/2020
1. Lifting plan and Equipment certification
including equipment capacity, specification… will
be submitted when equipment is mobilized to
the site and before start work.

06/03/2020

26/02/2020
2. DHI has revised and updated on MS Rev B
(Section 6.1.2)

06/03/2020

C

26/02/2020
3. DHI has mention in items Job Safety Analysis
(section 6.2) and risk assessment (attachment
03)

06/03/2020

C

C

06/03/2020
Closed
04/02/2020
2. Emergency incident response flow chart and
detailed communication network must be attached
06/03/2020
Closed

04/02/2020
3. Attach an emergency incident response plan
(evacuation routes, boat to rescue, how to do if an
incident occurs such as falling into water, cranes
collapse ...)
06/03/2020
Closed

Page 24 of 31


Comment Response Sheet (CRS)
04/02/2020
4. Environment
- Environmental risk assessment during the test piles
- List of facilities to prevent oil spills
06/03/2020
Closed

04/02/2020

5. JSA is too sketchy: Only use JSA for each specific
step in pile testing work (For example, the first day
you transport the pile to the construction site, Let's
do JSA and apply it to the transport work to ensure
safety)
Please provide a risk assessment (Will be much
clearer and more detailed): Initial control,
consequences, likelihood -> Additional measures,
the likelihood of occurrence has decreased? reduced
to what extent?...
Each step must be taken and clearly indicated the
risks of each job step, for example:
1. Transporting piles to the construction site
2. Lifting pile to the piling barge or stock barge and
arrange pile
3. Fabrication work for working platform
4. Installation of working platforms
5. Lifting pile to the working platforms
6. Piling
7. Install the load to test the pile
8. Load test
9. Dismantle each item
10. ....

26/02/2020
4. Environment
- Environment risk assessment during the test
piles is shown in Attachment 03
- DHI has revised and updated on MS Rev B
(Section 6.2)

06/03/2020

26/02/2020
5. DHI has revised and updated on MS Rev B
(Section 6.2) and attachment 03

06/03/2020

C

C

06/03/2020
Closed

Page 25 of 31