Landslide movement is one of the threats for the structural integrity of buried pipelines that are the main ways to transport oil and gas. In order to offer a theoretical basis for the design, safety evaluation, and maintenance of pipelines, mechanical behavior of the buried steel pipeline crossing landslide area was investigated by finite-element method, considering pipeline-soil interaction. Effects of landslide soil parameters, pipeline parameters, and landslide scale on the mechanical behavior of the buried pipeline were discussed. The results show that there are three high stress areas on the buried pipeline sections where the bending deformation are bigger. High stress area of the compression side is bigger than it on the tensile side, and the tensile strain is bigger than the compression strain in the deformation process. Buried pipeline in the landslide bed with hard soil is prone to fracture. Bigger deformations appear on the pipeline sections that the inside and outside lengths of the interface are 30 m and 10 m, respectively. The maximum displacement of the pipeline is smaller than the landslide displacement for the surrounding soil deformation. Bending deformations and tensile strain of the pipeline increase with the increase in landslide displacement. Bending deformation and the maximum tensile strain of the pipeline increase with increasing of the soil's elasticity modulus, cohesion, and pipeline's diameter–thickness ratio. Soil's Poisson's ratio has a great effect on the displacement of the middle part, but it has a little effect on other sections' displacement.

References

References
1.
Zhang
,
J.
,
Liang
,
Z.
, and
Han
,
C. J.
,
2015
, “
Finite Element Analysis of Wrinkling of Buried Pressure Pipeline Under Strike-Slip Fault
,”
Mechanika
,
21
(
3
), pp.
180
186
.
2.
Zhao
,
Z. G.
,
Yao
,
A. L.
, and
Zhao
,
X. F.
,
2006
, “
Types of Geologic Disasters for Long Distance Transmission Pipelines as Well as Prevention Control Measures and Prediction Techniques
,”
Pet. Eng. Constr.
,
32
(
1
), pp.
7
12
.
3.
Wang
,
L.
,
2008
,
A Preliminary Study on Gas-Transporting Pipeline Harm Caused by the Deformation of Landslide
,
China University of Geosciences
,
Wuhan, China
.
4.
Zhang
,
J.
,
Liang
,
Z.
, and
Han
,
C. J.
,
2015
, “
Numerical Simulation of Buckling Behavior of the Buried Steel Pipeline Under Reverse Fault Displacement
,”
Mech. Sci.
,
6
(
2
), pp.
203
210
.
5.
Zheng
,
J. Y.
,
Zhang
,
B. J.
,
Liu
,
P. F.
, and
Liu
,
L. L.
,
2012
, “
Failure Analysis and Safety Evaluation of Buried Pipeline Due to Deflection of Landslide Process
,”
Eng. Failure Anal.
,
25
(4), pp.
156
168
.
6.
Liang
,
Z.
,
1991
, “
Analyses of Pipeline Stress and Displacement at Landslide-Prone Areas
,”
Nat. Gas Ind.
,
11
(
3
), pp.
55
59
.
7.
Georgiadis
,
M.
,
1991
, “
Landslides Drag Forces on Pipelines
,”
Soil Found.
,
31
(
1
), pp.
156
161
.
8.
Zhu
,
H. X.
, and
Randolph
,
M. F.
,
2010
, “
Large Deformation Finite-Element Analysis of Submarine Landslide Interaction With Embedded Pipelines
,”
Int. J. Geomech.
,
10
(
4
), pp.
145
152
.
9.
Randolph
,
M. F.
,
Seo
,
D.
, and
White
,
D. J.
,
2010
, “
Parametric Solutions for Slide Impact on Pipelines
,”
J. Geotech. Geoenviron. Eng.
,
136
(
7
), pp.
940
949
.
10.
Yuan
,
F.
,
Wang
,
L. Z.
,
Guo
,
Z.
, and
Shi
,
R. W.
,
2012
, “
A Refined Analytical Model for Landslide or Debris Flow Impact on Pipelines—Part I: Surface Pipelines
,”
Appl. Ocean Res.
,
35
(1), pp.
95
104
.
11.
Yuan
,
F.
,
Wang
,
L. Z.
,
Guo
,
Z.
, and
Xie
,
Y.
,
2012
, “
A Refined Analytical Model for Landslide or Debris Flow Impact on Pipelines. Part II: Embedded Pipelines
,”
Appl. Ocean Res.
,
35
(1), pp.
105
114
.
12.
Zhang
,
J.
,
Liang
,
Z.
, and
Han
,
C. J.
,
2015
, “
Numerical Simulation of Mechanical Behavior of Buried Pipeline Impacted by Perilous Rock
,”
Mechanika
,
21
(
4
), pp.
264
271
.
13.
Vazouras
,
P.
,
Karamanos
,
S. A.
, and
Dakoulas
,
P.
,
2010
, “
Finite Element Analysis of Buried Steel Pipelines Under Strike-Slip Fault Displacement
,”
Soil Dyn. Earthquake Eng.
,
30
(
11
), pp.
1361
1376
.
14.
Wang
,
S. F.
,
Yin
,
Y. P.
, and
Men
,
Y. M.
,
2010
, “
In-Situ Test and Numerical Analysis of Skid Resistance for Micropile to Loess Landslide
,”
Hydrogeol. Eng. Geol.
,
37
(
6
), pp.
22
26
.
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