Soil spatial variability impact on the behavior of a reinforced earth wall
Adam HAMROUNI1(), Daniel DIAS2,3, Badreddine SBARTAI4
1. Laboratory InfraRES, Mohammed Cherif Messaadia University, SoukAhras 41000, Algeria 2. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei 230009, China 3. Antea Group, Antony 92160, France 4. Department of Civil Engineering, University of Annaba, Annaba 23000 & LMGHU Laboratory, University of Skikda, Skikda 21000, Algeria
This article presents the soil spatial variability effect on the performance of a reinforced earth wall. The serviceability limit state is considered in the analysis. Both cases of isotropic and anisotropic non-normal random fields are implemented for the soil properties. The Karhunen-Loève expansion method is used for the discretization of the random field. Numerical finite difference models are considered as deterministic models. The Monte Carlo simulation technique is used to obtain the deformation response variability of the reinforced soil retaining wall. The influences of the spatial variability response of the geotechnical system in terms of horizontal facing displacement is presented and discussed. The results obtained show that the spatial variability has an important influence on the facing horizontal displacement as well as on the failure probability.
. [J]. Frontiers of Structural and Civil Engineering, 2020, 14(2): 518-531.
Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI. Soil spatial variability impact on the behavior of a reinforced earth wall. Front. Struct. Civ. Eng., 2020, 14(2): 518-531.
initial apparent friction coefficient at the soil/strip interface “f*0”
–
1.2
minimum apparent friction coefficient at the soil/strip interface “f*1”
–
0.6
shear stiffness at the soil strip interface kb (MN/m2/m)
–
0.22
Tab.2
Fig.2
parameters
value reference
variation
DU/Uref (%)
min
max
Young’s modulus (MPa)
50
37.5
62.5
0.49
-0.23
Poisson’s ratio
0.3
0.225
0.375
0.329
-1.83
friction angle (°)
36
27
45
122.9
-40.38
dilation angle (°)
6
4.5
7.5
0.57
-1.17
unit weight (kN/m3)
15.6
11.7
19.5
-18.97
20.05
friction angle at panel/soil interface (°)
24
18
30
1.64
-0.82
Tab.3
Fig.3
Fig.4
Fig.5
Fig.6
M
50
100
150
200
250
Ns
μ (U) (cm)
COV (U) (%)
μ (U) (cm)
COV (U) (%)
μ (U) (cm)
COV (U) (%)
μ (U) (cm)
COV (U) (%)
μ (U) (cm)
COV (U) (%)
50
7.4572
12.29
6.9660
15.47
7.7780
12.84
8.7580
14.44
9.6880
16.15
100
7.5887
12.56
6.2480
13.65
8.5020
13.10
7.1200
14.84
8.4020
14.20
200
7.6827
12.30
8.5770
14.71
6.8680
14.21
7.2020
14.27
8.7300
14.18
300
7.7630
12.68
8.7410
15.18
5.9760
14.68
8.2630
14.48
10.7700?
14.22
400
7.7478
12.88
8.7480
14.92
8.5550
14.96
10.8400?
14.80
8.4070
13.88
500
7.7528
13.03
9.4610
14.84
7.2360
14.98
8.7240
14.59
6.6880
14.04
Tab.4
Fig.7
Fig.8
Fig.9
Fig.10
Fig.11
Fig.12
Fig.13
item
COV (%)
COVφ = 10%
7.5022
0.7784
10.3756
COVj = 15%
7.6901
1.1297
14.6903
COVj = 20%
7.9875
1.4617
18.2998
Tab.5
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