Tinh toan dam bao on dinh tuong chan
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T-07-001
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13-DEC-2006
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C«ng tr×nh TRUNG T¢M §IÒU HµNH Vµ TH¤NG TIN
VIÔN TH¤NG §IÖN LùC VIÖT NAM
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mục lục
Trang
1. Tổng quan
3
2. Mặt bằng, mặt cắt bố trí tờng chắn và neo trong đất
3
3. Tính toán neo trong đất.............
5
4. Tính toán thiết kế tờng chắn dày 800 mm, sâu 28 m
4.1
Thông số đất ...............................
9
4.2
Paroi 2 Dữ liệu đầu vào.....
10
4.3 Paroi 2 Xuất kết quả...
14
4.4
Kết quả tính toán thép Xuất kết quả từ Cacao
..
29
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1. Tổng quan
Dới đây là phần trình bày các tính toán và giả định cho tờng chắn đất ở các
giai đoạn thi công đào đất, giằng chống đến cao độ đào đất cuối cùng và giai
đoạn thi công kết cấu sàn tầng hầm.
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2. mÆt b»ng, mÆt c¾t bè trÝ têng ch¾n vµ neo trong ®Êt
4
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3. TÝnh to¸n thiÕt kÕ neo trong ®Êt
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6
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4. TÝnh to¸n thiÕt kÕ têng ch¾n dµy 800 mm, s©u 28m.
4.1
Th«ng sè ®Êt
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Paroi 2 – D÷ liÖu ®Çu vµo
PROJECT
EVN,Dwall 800,Anchor A1,A2,@3.2M
ZONE
Cua Bac-Ba Dinh-Ha Noi
RESPONSABLE
BORE HOLE BH3
PROJECT_NUMBER
BSV-T0022006
DATE
5 DEC 06
SOIL
1 BFill_spt4
c 1.870 0.870 13.3 1.86 0.77 320 0
2 Silty_Sand_spt14 c 2.000 1.000 30.0 0.00 0.5 1100 0
3 Coarse_Sand_spt21 c 2.000 1.000 35.6 0.00 0.426 2000 0
EI
85333 0 0
DATAS
cote 6.5M
SEGMENTS
4.725 1 1 1
2.500 1 1 1
1.700 1 1 1
1.170 1 1 1
0.125 2 2 1
-1.50 2 2 1
-3.33 2 2 1
-3.70 2 2 1
-4.50 2 2 1
-4.95 2 2 1
-7.55 2 2 1
-9.30 2 2 1
-11.0 3 3 1
-13.0 3 3 1
-15.0 3 3 1
-17.0 3 3 1
-19.0 3 3 1
-21.5 3 3 1
BASE
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li
DISPLAY_SCALE
20 2 30 30 30
EXCAVATION_SOIL_SIDE
6.5
EXCAVATION_EXC_SIDE
6.5
SOIL_WATER_LEVEL
-3.33
EXCAVATION_WATER_LEVEL
-3.33
SOIL_SIDE_LOADS
6.5 1.0
PHASE
1. Excavate to EL.+1.70
EXCAVATION_EXC_SIDE
1.70
DESIGN
segments
DISPLAY
ecran
PHASE
2. Install anchor A1 at EL.+2.500, preload 60t
INSTALL_UNILATERAL_ANCHOR
3 3.2 30 60 1117
DESIGN
segments
DISPLAY
ecran
PHASE
3. Excavate to EL.-4.50
EXCAVATION_EXC_SIDE
-4.500
EXCAVATION_WATER_LEVEL
-4.500
DESIGN
segments
DISPLAY
ecran
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PHASE
4. Install anchor A2 at EL.-3.700, preload 75t
INSTALL_UNILATERAL_ANCHOR
9 3.2 30 75 1117
DESIGN
segments
DISPLAY
ecran
PHASE
5. Excavate to EL-7.550
EXCAVATION_EXC_SIDE
-7.550
EXCAVATION_WATER_LEVEL
-7.550
DESIGN
segments
DISPLAY
ecran
PHASE
6. Install raft at EL.-4.95,B2 at EL.+0.125,B1 at EL+4.725, Remove A1, A2
ELASTIC_SLAB_INIT
11
52980 0
00
00
ELASTIC_SLAB_INIT
6
13245 0
00
00
ELASTIC_SLAB_INIT
2
13245 0
00
00
SUPPRESS_SLAB_TIEBACK
9
SUPPRESS_SLAB_TIEBACK
3
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DESIGN
segments
DISPLAY
ecran
CACAO_ENVELOPPE
Cacao/EVN-HN_1_temp_anchor_type1_soil.cao
Cacao/EVN-HN_1_temp_anchor_type1_exca.cao
PHASE
7-Permanent
ELASTIC_CONCRETE_CREEPING
2
6620 0
0 0
ELASTIC_CONCRETE_CREEPING
6
6620 0
0 0
ELASTIC_CONCRETE_CREEPING
11
26490 0
0 0
DESIGN
segments
DISPLAY
ecran
CACAO_PHASE
Cacao/EVN-HN_1_Permanent_anchor_type1_.cao
DISPLAY_ENVELOPPE
ecran
END
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4.3 Paroi 2 – XuÊt kÕt qu¶
PHASE : 1. Excavate to EL.+1.70
PHASE : 2. Install anchor A1 at EL.+2.500, preload 60t
PHASE : 3. Excavate to EL.-4.50
PHASE : 4. Install anchor A2 at EL.-3.700, preload 75t
PHASE : 5. Excavate to EL-7.550
PHASE : 6. Install raft at EL.-4.95,B2 at EL.+0.125,B1 at EL+4.725, Remove A1, A2
PHASE : 7-Permanent
Site : EVN,Dwall 800,Anchor A1,A2,@3.2M
Zone : Cua Bac-Ba Dinh-Ha Noi
Person in charge : BORE HOLE BH3
Site number : BSV-T0022006
Soil layers
+------------+-+-----+-----+-----+-----+-----------+-------------+-----+-------------+
|
Name
|c|unit |subm.| int |Cohe-|
|
|
|
|
|const coeffx|
|
of
|r| Wt | Wt | ang | sion| Ka | Aa | Kp | Ap | K0 | term | S'v |
|
soil
|m|t/m3 |t/m3 | deg |t/m2 |
|
|
|
|
| t/m3 | 1/m |
+------------+-+-----+-----+-----+-----+-----+-----+------+------+-----+------+------+
|BFill_spt4 |c| 1.87| 0.87| 13.3| 1.86|0.626|1.582| 1.892| 3.532|0.770|
320|
0|
|Silty_Sand_s|c| 2.00| 1.00|
30| 0.00|0.333|1.155| 4.980| 6.292|0.500| 1100|
0|
|Coarse_Sand_|c| 2.00| 1.00| 35.6| 0.00|0.264|1.028| 7.653| 8.102|0.426| 2000|
0|
+------------+-+-----+-----+-----+-----+-----+-----+------+------+-----+------+------+
c = Caquot, r = Rankine, m = Manual
Geometric properties
+----+----------+---------------+-+
|
|
E*I
| Cyl. stiffness| |
| No.| (t*m2) |
(t/m3)
| |
+----+----------+---------------+-+
| 1 |
85333|
0.000|0|
+----+----------+---------------+-+
Division of the wall into segments
+-------+----------+-------------+-------------+----+
|Segment|
Base
|
Soil
type
|| EI |
| No. | level (m)| soil side | excav. side | No.|
+-------+----------+-------------+-------------+----+
|
0 |
6.500|.............|.............|....|
|
1 |
4.725|BFill_spt4
|BFill_spt4
| 1 |
|
2 |
2.500|BFill_spt4
|BFill_spt4
| 1 |
|
3 |
1.700|BFill_spt4
|BFill_spt4
| 1 |
|
4 |
1.170|BFill_spt4
|BFill_spt4
| 1 |
|
5 |
0.125|Silty_Sand_s |Silty_Sand_s | 1 |
|
6 |
-1.500|Silty_Sand_s |Silty_Sand_s | 1 |
|
7 |
-3.330|Silty_Sand_s |Silty_Sand_s | 1 |
|
8 |
-3.700|Silty_Sand_s |Silty_Sand_s | 1 |
|
9 |
-4.500|Silty_Sand_s |Silty_Sand_s | 1 |
|
10 |
-4.950|Silty_Sand_s |Silty_Sand_s | 1 |
|
11 |
-7.550|Silty_Sand_s |Silty_Sand_s | 1 |
|
12 |
-9.300|Silty_Sand_s |Silty_Sand_s | 1 |
|
13 |
-11.000|Coarse_Sand_ |Coarse_Sand_ | 1 |
|
14 |
-13.000|Coarse_Sand_ |Coarse_Sand_ | 1 |
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|
15 |
-15.000|Coarse_Sand_ |Coarse_Sand_ | 1 |
|
16 |
-17.000|Coarse_Sand_ |Coarse_Sand_ | 1 |
|
17 |
-19.000|Coarse_Sand_ |Coarse_Sand_ | 1 |
|
18 |
-21.500|Coarse_Sand_ |Coarse_Sand_ | 1 |
+-------+----------+-------------+-------------+----+
Option : free toe
Excavation soil side at 6.50 m
Excavation side excavation at 6.50 m
Hydrostatic water level on terre side = -3.33 m
Hydrostatic water level on fouille side = -3.33 m
Uniforme surcharge on terre side
+--------+--------+--------+
| Load | Level | Load |
| No.
| (m)
| (t/m2) |
+--------+--------+--------+
|
1
|
6.500|
1.000|
+--------+--------+--------+
PHASE : 1. Excavate to EL.+1.70
(§µo ®Êt ®Õn cao ®é EL.+1.70)
Excavation side excavation at 1.70 m
*** iteration no 1 *** y1 = 10.48339 mm y2 = 10.16145 mm
*** iteration no 2 *** y1 = 15.00721 mm y2 = 14.48159 mm
*** iteration no 3 *** y1 = 15.56249 mm y2 = 15.01179 mm
PHASE : 1. Excavate to EL.+1.70
Exacavation level on soil side : 6.50. Excavation level on excavation side : 1.70.
Water level on soil side : -3.33. Water level on excavation side : -3.33.
Number of iterations : 3
+-------+-------+--------+--------+----------+-------+-------+---+-------------+
|
|
|
|
|
| react.| water||sta|at rest abcis|
| Level |
y
|
M
|
T
| rotation |+ water| only | | | soil | exc. |
| (m)
| (mm) | (t*m) |
(t) | (radian) | (t/m2)| (t/m2)|e|x| (mm) | (mm) |
|-------+-------+--------+--------+----------+-------+-------+-+-+------+------+
|
6.50| 15.56|
0.00|
0.00| 1.55e-003|
0.00|
0.00|1|0| 0.00| **** |
|
4.72| 12.81|
-0.00|
0.00| 1.55e-003|
0.00|
0.00|1|0| 0.00| **** |
|
4.72| 12.81|
0.00|
-0.00| 1.55e-003|
0.00|
0.00|1|0| 0.00| **** |
|
2.50|
9.36|
-2.03|
3.33| 1.54e-003|
3.53|
0.00|2|0| 0.00| **** |
|
2.50|
9.36|
-2.03|
3.33| 1.54e-003|
3.53|
0.00|2|0| 0.00| **** |
|
1.70|
8.14|
-5.99|
6.78| 1.50e-003|
5.08|
0.00|2|0| 0.00| **** |
|
1.70|
8.14|
-5.99|
6.78| 1.50e-003|
2.47|
0.00|2|2| 0.00| 0.00|
|
1.17|
7.36|
-9.95|
8.22| 1.45e-003|
2.97|
0.00|2|2| 0.00| 0.00|
|
1.17|
7.36|
-9.95|
8.22| 1.45e-003| -1.28|
0.00|1|3| 0.00| 0.00|
|
0.13|
5.92| -16.72|
4.41| 1.29e-003| -3.70|
0.00|1|2| 0.00| 0.00|
|
0.13|
5.92| -16.72|
4.41| 1.29e-003| -3.70|
0.00|1|2| 0.00| 0.00|
| -1.50|
4.11| -19.69|
-0.33| 9.29e-004| -2.25|
0.00|1|2| 0.00| 0.00|
| -1.50|
4.11| -19.69|
-0.33| 9.29e-004| -2.25|
0.00|1|2| 0.00| 0.00|
| -3.33|
2.78| -15.88|
-3.50| 5.37e-004| -1.13|
0.00|2|2| 0.00| 0.00|
| -3.33|
2.78| -15.88|
-3.50| 5.37e-004| -1.13|
0.00|2|2| 0.00| 0.00|
| -3.70|
2.59| -14.52|
-3.84| 4.72e-004| -0.72|
0.00|2|2| 0.00| 0.00|
| -3.70|
2.59| -14.52|
-3.84| 4.72e-004| -0.72|
0.00|2|2| 0.00| 0.00|
| -4.50|
2.27| -11.30|
-4.11| 3.50e-004|
0.00|
0.00|2|2| 0.00| 0.00|
| -4.50|
2.27| -11.30|
-4.11| 3.50e-004|
0.00|
0.00|2|2| 0.00| 0.00|
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| -4.95|
2.12|
-9.46|
-4.04| 2.96e-004|
0.32|
0.00|2|2| 0.00| 0.00|
| -4.95|
2.12|
-9.46|
-4.04| 2.96e-004|
0.32|
0.00|2|2| 0.00| 0.00|
| -7.55|
1.61|
-1.52|
-1.55| 1.45e-004|
1.46|
0.00|2|2| 0.00| 0.00|
| -7.55|
1.61|
-1.52|
-1.55| 1.45e-004|
1.46|
0.00|2|2| 0.00| 0.00|
| -9.30|
1.37|
-1.29|
1.46| 1.24e-004|
1.97|
0.00|2|2| 0.00| 0.00|
| -9.30|
1.37|
-1.29|
1.46| 1.24e-004| -1.23|
0.00|2|2| 0.00| 0.00|
| -11.00|
1.19|
-2.35|
0.01| 8.43e-005| -0.51|
0.00|2|2| 0.00| 0.00|
| -11.00|
1.19|
-2.35|
0.01| 8.43e-005| -0.51|
0.00|2|2| 0.00| 0.00|
| -13.00|
1.07|
-1.71|
-0.48| 3.49e-005| -0.05|
0.00|2|2| 0.00| 0.00|
| -13.00|
1.07|
-1.71|
-0.48| 3.49e-005| -0.05|
0.00|2|2| 0.00| 0.00|
| -15.00|
1.04|
-0.78|
-0.39| 6.05e-006|
0.10|
0.00|2|2| 0.00| 0.00|
| -15.00|
1.04|
-0.78|
-0.39| 6.05e-006|
0.10|
0.00|2|2| 0.00| 0.00|
| -17.00|
1.04|
-0.21|
-0.18|-4.73e-006|
0.10|
0.00|2|2| 0.00| 0.00|
| -17.00|
1.04|
-0.21|
-0.18|-4.73e-006|
0.10|
0.00|2|2| 0.00| 0.00|
| -19.00|
1.05|
-0.01|
-0.04|-6.69e-006|
0.05|
0.00|2|2| 0.00| 0.00|
| -19.00|
1.05|
-0.01|
-0.04|-6.69e-006|
0.05|
0.00|2|2| 0.00| 0.00|
| -21.50|
1.07|
0.00|
-0.00|-6.59e-006| -0.02|
0.00|2|2| 0.00| 0.00|
|-------+-------+--------+--------+----------+-------+-------+-+-+------+------+
Passive pressure available 2572.48 t/m
Passive pressure mobilised 228.94 t/m
Safety factor 11.24
PHASE : 2. Install anchor A1 at EL.+2.500, preload 60t
(Thi c«ng neo líp thø 1 ë cao ®é EL.+2.500, gia t¶i tríc 60 tÊn)
Tieback level 2.50 m , segment No. 3
unilateral contact
anchor spacing = 3.200
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inclination below horizontal (degrees) = 30.000
anchor tension after blocking off = 60.000
anchor rigidity = 1117.000
*** iteration no 1 *** y1 = 1.96472 mm y2 = 1.96485 mm
*** iteration no 2 *** y1 = 10.31119 mm y2 = 9.91466 mm
PHASE : 2. Install anchor A1 at EL.+2.500, preload 60t
Exacavation level on soil side : 6.50. Excavation level on excavation side : 1.70.
Water level on soil side : -3.33. Water level on excavation side : -3.33.
Number of iterations : 2
+-------+-------+--------+--------+----------+-------+-------+---+-------------+
|
|
|
|
|
| react.| water||sta|at rest
abcis||
| Level |
y
|
M
|
T
| rotation |+ water| only | | | soil | exc. |
| (m)
| (mm) | (t*m) |
(t) | (radian) | (t/m2)| (t/m2)|e|x| (mm) | (mm) |
|-------+-------+--------+--------+----------+-------+-------+-+-+------+------+
|
6.50| 10.31|
0.00|
-0.00| 1.12e-003|
1.68|
0.00|2|0| 13.16| **** |
|
4.72|
8.34|
-2.52|
2.76| 1.10e-003|
1.43|
0.00|2|0| 2.42| **** |
|
4.72|
8.34|
-2.52|
2.76| 1.10e-003|
1.43|
0.00|2|0| 2.42| **** |
|
2.50|
6.04| -13.98|
8.89| 9.11e-004|
4.60|
0.00|2|0| 0.00| **** |
=> Anchor tension = 60.000 t
|
2.50|
6.04| -13.98|
-7.35| 9.11e-004|
4.60|
0.00|2|0| 0.00| **** |
|
1.70|
5.36|
-9.71|
-3.12| 8.03e-004|
5.97|
0.00|2|0| 0.00| **** |
|
1.70|
5.36|
-9.71|
-3.12| 8.03e-004|
4.25|
0.00|2|2| 0.00| 0.00|
|
1.17|
4.95|
-8.67|
-0.80| 7.46e-004|
4.51|
0.00|2|2| 0.00| 0.00|
|
1.17|
4.95|
-8.67|
-0.80| 7.46e-004|
4.02|
0.00|2|2| 5.69| 3.32|
|
0.13|
4.22|
-8.63|
0.10| 6.41e-004|
0.03|
0.00|2|2| 3.94| 0.00|
|
0.13|
4.22|
-8.63|
0.10| 6.41e-004|
0.03|
0.00|2|2| 3.94| 0.00|
| -1.50|
3.31|
-8.59|
-0.30| 4.76e-004| -0.51|
0.00|2|2| 1.64| 0.00|
| -1.50|
3.31|
-8.59|
-0.30| 4.76e-004| -0.51|
0.00|2|2| 1.64| 0.00|
| -3.33|
2.61|
-6.92|
-1.65| 3.05e-004| -0.74|
0.00|2|2| 0.00| 0.00|
| -3.33|
2.61|
-6.92|
-1.65| 3.05e-004| -0.74|
0.00|2|2| 0.00| 0.00|
| -3.70|
2.50|
-6.26|
-1.88| 2.77e-004| -0.51|
0.00|2|2| 0.00| 0.00|
| -3.70|
2.50|
-6.26|
-1.88| 2.77e-004| -0.51|
0.00|2|2| 0.00| 0.00|
| -4.50|
2.30|
-4.64|
-2.11| 2.26e-004| -0.07|
0.00|2|2| 0.00| 0.00|
| -4.50|
2.30|
-4.64|
-2.11| 2.26e-004| -0.07|
0.00|2|2| 0.00| 0.00|
| -4.95|
2.20|
-3.69|
-2.09| 2.04e-004|
0.14|
0.00|2|2| 0.00| 0.00|
| -4.95|
2.20|
-3.69|
-2.09| 2.04e-004|
0.14|
0.00|2|2| 0.00| 0.00|
| -7.55|
1.76|
0.14|
-0.39| 1.60e-004|
1.12|
0.00|2|2| 0.00| 0.00|
| -7.55|
1.76|
0.14|
-0.39| 1.60e-004|
1.12|
0.00|2|2| 0.00| 0.00|
| -9.30|
1.47|
-1.20|
2.12| 1.57e-004|
1.74|
0.00|2|2| 0.00| 0.00|
| -9.30|
1.47|
-1.20|
2.12| 1.57e-004| -1.65|
0.00|2|2| 0.00| 0.00|
| -11.00|
1.24|
-2.89|
0.15| 1.11e-004| -0.72|
0.00|2|2| 0.00| 0.00|
| -11.00|
1.24|
-2.89|
0.15| 1.11e-004| -0.72|
0.00|2|2| 0.00| 0.00|
| -13.00|
1.09|
-2.23|
-0.58| 4.81e-005| -0.09|
0.00|2|2| 0.00| 0.00|
| -13.00|
1.09|
-2.23|
-0.58| 4.81e-005| -0.09|
0.00|2|2| 0.00| 0.00|
| -15.00|
1.03|
-1.06|
-0.51| 9.85e-006|
0.12|
0.00|2|2| 0.00| 0.00|
| -15.00|
1.03|
-1.06|
-0.51| 9.85e-006|
0.12|
0.00|2|2| 0.00| 0.00|
| -17.00|
1.03|
-0.31|
-0.25|-5.22e-006|
0.12|
0.00|2|2| 0.00| 0.00|
| -17.00|
1.03|
-0.31|
-0.25|-5.22e-006|
0.12|
0.00|2|2| 0.00| 0.00|
| -19.00|
1.05|
-0.02|
-0.06|-8.35e-006|
0.06|
0.00|2|2| 0.00| 0.00|
| -19.00|
1.05|
-0.02|
-0.06|-8.35e-006|
0.06|
0.00|2|2| 0.00| 0.00|
| -21.50|
1.07|
0.00|
-0.00|-8.36e-006| -0.02|
0.00|2|2| 0.00| 0.00|
|-------+-------+--------+--------+----------+-------+-------+-+-+------+------+
Passive pressure available 2572.48 t/m
18
JOB No.
DOC. No.
REV.
T-07-001
b¶ng tÝnh
x-x
SHEET
19
0
OF
42
Passive pressure mobilised 223.99 t/m
Safety factor 11.48
PHASE : 3. Excavate to EL.-4.50
(§µo ®Êt ®Õn cao ®é EL.-4.50)
Excavation side excavation at -4.50 m
Hydrostatic water level on fouille side = -4.50 m
*** iteration no 1 *** y1 = 10.93092 mm y2 = 10.77116 mm
*** iteration no 2 *** y1 = 12.50313 mm y2 = 12.95520 mm
*** iteration no 3 *** y1 = 20.36156 mm y2 = 20.87409 mm
*** iteration no 4 *** y1 = 39.54519 mm y2 = 39.42229 mm
*** iteration no 5 *** y1 = 39.54888 mm y2 = 39.42606 mm
PHASE : 3. Excavate to EL.-4.50
Exacavation level on soil side : 6.50. Excavation level on excavation side : -4.50.
Water level on soil side : -3.33. Water level on excavation side : -4.50.
Number of iterations : 5
+-------+-------+--------+--------+----------+-------+-------+---+-------------+
|
|
|
|
|
| react.| water||sta|at rest
abcis||
| Level |
y
|
M
|
T
| rotation |+ water| only
| | | soil | exc. |
19
