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Calculation of earth retaining structure

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To SHIMIZU COPORATION

NIKKISO VIETNAM, INC.PROJECT3 MEDICAL FACTORY PROJECT

Calculation of earth
retaining structure
EXCAVATION H=4,1M

04/10/2014

Hirose (VietNam) HaNoi
TEL
FAX

04 44500202
04 44500203

Design No.
Approval

Approval In charge

Contents

PAGE

1. Outline of design-------------------------------- 1
1. Design standard
2. Soil boring log and planned section
3. Soil parameters
2. Summary of calculation result ------------------- 2
3. Examination of penetration depth ---------------- 3
1. Calculation of penetration depth by Y.L.Chang
2. Examination of boiling
3. Examination of heaving
4. Examination of earth retaining wall ------------- 7
1. Lateral pressure distribution diagram
2. Check of stress

P-1
1.Outline of design
1-1 Design standard As per「Recommendation for Design and Construction Practice of
Earth Retaining for Excavation」by Architectural Institute of Japan.
1-2 Soil boring log and planned section
Depth
(GL-m)
0

Soil
property
name

Changing
of
N-value point
soil
layer for
10 30 50 design
-1.500 m

q1

1.000

1
1.300
2
2.500

5

3

10

7.100
4
9.800

4.100

6.900

5
15

15.700
6

20

22.100
7

25

26.500
8

30

Pit depth
GL- 4.100 m

32.200
9
35.500
10
37.500

35

Surcharge
q1= 15.00 kN/m 2
Earth retaining wall

40

SP-4
 L= 12.000 m
   (Protrusion 1.000 m)
45
Stress
σmax=
 

143 N/mm 2 ≦ fb =

225 N/mm 2 -OK-

50

1-3 Soil parameters
Active side
Unit weight

Internal
friction
angle

Cohesion

( ゚)

(kN/m 2)

Water
Modulus of pressure
subgrade
reaction coefficient
(kN/m 3)

Soil
property
name

N-value

1

Sandy soil

7.0

17.0

7.0

25

0.0

15226

1.00

0.57

2

Cohesive soil

0.0

16.0

6.0

0

15.0

0

1.00

0.57

3

Cohesive soil

0.0

15.0

5.0

0

10.0

0

1.00

0.57

4

Cohesive soil

5.0

16.0

6.0

0

15.0

13282

1.00

0.57

5

Sandy soil

11.0

18.0

8.0

28

0.0

18293

1.00

0.57

6

Cohesive soil

24.0

19.0

9.0

0

120.0

25110

1.00

0.57

7

Sandy soil

22.0

18.5

8.5

33

0.0

24238

1.00

0.57

8

Cohesive soil

22.0

18.5

8.5

0

80.0

24238

1.00

0.57

9

Cohesive soil

42.0

19.0

9.0

0

120.0

31515

1.00

0.57

10

Sandy soil

56.0

19.5

9.5

32

0.0

35419

1.00

0.57

Soil layer
NO.

Wet

Underwater
(kN/m 3)
(kN/m 3)

K

P-2
2.Summary of calculation result
2-1 Earth retaining wall
Steel sheet pile method Size
:
Penetration depth:
Overall length
:
(Protrusion 
1)Penetration depth
Examination
Chang
Boiling
heaving
Max. value

Excavation
H(m)
  4.100
  4.100
  4.100
-----

Penetration

 Ld(m)
  6.74...
To SHIMIZU COPORATION
NIKKISO VIETNAM, INC.PROJECT3 MEDICAL FACTORY PROJECT
Calculation of earth
retaining structure
EXCAVATION H=4,1M
04/10/2014
Hirose (VietNam) HaNoi
TEL 04 44500202
FAX 04 44500203
Design No.
Approval Approval In charge
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