METHOD STATEMENT FOR PERMANENT PILLING WORK ON SHORE

Comment Response Sheet (CRS)
Project Title

Van Phong 1 BOT Thermal Power Plant Project

Document Title

METHOD STATEMENT FOR PERMANENT PILLING
WORK [ON SHORE]

Document Type

For Approval

Document No

VP1-0-L4-C-GEN-10021

Returned Status

NA

Prepared by

CRS No

VP1-0-L4-C-GEN-10021-A-CRS

CRS Issued Date

02/06/2020

Engineer

Construction

Remarks

No.

Section/
Page

Response to Comment

Review
Date

Status O/C *

1

4

h. Approved MS xxx? for test pile to be listed

MS of test pile is added.

02/06/2020

O

2

5

Considering the piling procedure is a common and
single activity, Lot-4 is requested to share the
work plan for each specific structure when the
piling work to be carried out in different condition
of ground level.

Chimney area the working plan was mention in
VP1-O-L4-C-UHN-10054 Working plan of
excavation works for Chimney

02/06/2020

O
Noted

- Add work sequence diagram including work
place preparation, surveying, soil and pile head
disposal.
- Casing will not be used?

Site preparation and survey work procedure is
described. Soil handling is described in 7.4
Excavating soil and the cutting pile head to be
disposed by waste treatment company.

02/06/2020

O
Closed

3

9

Lot 4

For the other area piling working plan will be
done at the current ground level (G.L EL+6.1m).

The casing is applied for proper depth to prevent
the collapsing of the soft and loose soil/sand
layer of the hole.

Page 1 of 5


Comment Response Sheet (CRS)
4

9

- Please explain why the auger could not be in the
slurry?
- Recommend the auger inside grout milk from
0.5m~1m in case have underground water in the

borehole to avoid mix grout with water.

Well noted and updated.

02/06/2020

O
Closed

O

The auger can be lower than the cement milk
level from 0.5m~1m (in case have underground
water in the borehole to avoid mix grout with
water).

5

13

Clarify code/standard for this requirement

The frequency of MT test will be clarified and
described in ITP for permanent piling work.

02/06/2020

6

15

Testing for lateral and tension forces need to be
added as required by PIII-2 Exh B1 8.8.2.

Design loading capacity of piles had been
verified pursuant to Clause 8.8.2 [Technical
specification]. Corresponding plan had informed
to client through VP1-0-L4-C-GEN-00020 and
the result of test reported though VP1-0-L4-GEN1005, 53&54 . The working load will be verified
by PDA or compression test. Contractor would
like to verify the integrity of working pile using
PDA.

02/06/2020

7

15

Clarify frequency of test pile according to applied
standard.

The frequency will be clarified and described in
ITP for permanent piling work.

02/06/2020

8

21

Please give the evaluation of PDA test compared
with static loading test before acceptance.

We will make evaluation of PDA test compared
with static loading test when get the results and
report it in the final report.

02/06/2020

9

21

Please clarify frequency of PDA test

The frequency will be clarified and described in
ITP for permanent piling work.

02/06/2020

10

22

Drop height of 2m and 2.5m are commonly
applied. After PDA any test to determine integrity
of piles???

The drop height depend on the hammer which

will be used. The calcuation of drop height will be
added in Rev.B. During PDA test, the intergrity of
test pile will be checked.

02/06/2020

O

The cited documents
include lateral and
tension tests, thus they
they should be
included here as well.

O
Noted
Please submit before apply
O
PDA for working piles.
Reply noted.
Noted
O

Closed.
O

Page 2 of 5


Comment Response Sheet (CRS)

11

3 of 20

Please detail how many steel plates should be
provided for the piling machine movement on the
site to prevent overturning for subcontractor
implementation.

We will use 4 pieces steel plates that will be used
to spread on road to stabilize the auger machine
and crane.

OPEN.
Please reflect
it in the risk
02/06/2020
O
assessment for site implementation and
provide the clue for review

Dimension 1500x600x15mm

12

3 of 20

Open holes from all the piles which are driven
down are potential hazards and are the traps on
the site. it should be covered by stable steel nets.

Please detail the countermeasure clearly against
this hazards for site implementation.

In case of the Open holes from all the piles which
are driven down are potential hazards and are
the traps on the site. it should be covered by
stable steel nets. Contractors have fabricate
steel nets (square wire mesh d10a150 and wider
than hole diameter 20cm) to cover open hole and
set up barricade with signage installed around
the hole

OPEN.
Please reflect
it in the risk
02/06/2020
O
assessment for site implementation and
provide the clue for review

13

4 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

14

4 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

15

5 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

16

6 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

OPEN.
please refer
to JSA for detail
02/06/2020
O

comments

Page 3 of 5


Comment Response Sheet (CRS)
17

7 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

18

8 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on

Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

19

9 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

20

10 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

21

11 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

22

12 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

23

13 of 20

OPEN.
please refer
02/06/2020
O to JSA for detail
comments

OPEN. please refer
02/06/2020
O

to JSA for detail

comments

02/06/2020
O
OPEN.
please refer
to JSA for detail
comments

Page 4 of 5


Comment Response Sheet (CRS)
24

14 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

02/06/2020
O
OPEN.

please refer
to JSA for detail
comments

25

16 of 20

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management

JSEA has been added in Rev.B

OPEN. please refer
02/06/2020
O

Please prepare JSEA and submit pertaining to
this document for site implementation base on
Doosan's VP1-C-L4-H-GEN-00003 B HSE Risk
Management
Additional Notes (if any)
* O - Open, C Closed

JSEA has been added in Rev.B

26

17 of 20

to JSA for detail

comments

OPEN.
please refer
to JSA for detail
02/06/2020
O
comments

Page 5 of 5


AP

APPROVED
Approved

APPROVED WITH COMMENT

AC

Contractor to revise the correction and resubmit

NOT APPROVED

NA

Revise the correction and resubmit before proceeding

RE

REVIEWED
Information acknowledged with no comment

REVIEWED WITH COMMENT

RC

Information acknowledged with comments
Note: Approval or comment does not relieve the Contractor of
all obligations covered under contract

Discipline: Civil
07 Jul 20
Date:

ö

1