|Table of Contents|

Research on soil arching effect and deformation law under condition of self-weight stress of slope(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年04期
Page:
146-156
Research Field:
岩土工程
Publishing date:

Info

Title:
Research on soil arching effect and deformation law under condition of self-weight stress of slope
Author(s):
RUI Rui1; 2;  FANG Hanzhe1;  HU Xiangdong3;  YI Kun3;  LIU Ji3;  HE Shikai1;  CUI Chengyu1
(1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China; 2. Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572025, Hainan, China; 3. The First Engineering Branch of China Railway Construction Corporation Harbour & Channel Engineering Bureau Group Co., Ltd., Guangzhou 511400, Guangdong, China)
Keywords:
soil arching effect;  deformation law;  eccentric loading condition;  trapdoor test;  DEM
PACS:
TU433
DOI:
10.19815/j.jace.2023.11045
Abstract:
Array-type trapdoor apparatus was used to conduct trapdoor tests under eccentric loading(slope)conditions. The full field displacement and shear strain of the filling section were obtained through particle image velocimetry technology, and the vertical load changes of the trapdoor and surrounding fixed parts during the sinking process of trapdoor were accurately measured through a load gauge. The influence law of the distance between the trapdoor and the foot of slope was explored through discrete element method(DEM)numerical simulation, and the micro mechanical mechanisms such as the rotation of filling particles, the deviation of principal stress, and the distribution of force chain during the sinking process of trapdoor were analyzed. The results show that during the sinking process of trapdoor, the load is transferred more quickly to the foot of slope, and then more to the deeply buried side, ultimately resulting in a similar increase in load on both sides. The sliding surface at the foot of slope in the filling material is formed earlier than the deeply buried side, and the opening angle of the sliding surfaces on both sides is basically constant. However, the deeply buried side will form a new sliding surface that extends outward as the settlement of the trapdoor increases. The response curve of the foundation under eccentric conditions is similar to the traditional trapdoor test, where the closer the trapdoor is to the deeply buried side, the more stable the soil arching effect becomes. When the distance between the trapdoor and the foot of slope reaches twice the width of trapdoor, the soil arching effect remains basically unchanged. As the trapdoor sinks, a strong force chain network structure with arch feet on both sides of the trapdoor is formed in the filling material.

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Last Update: 2025-07-10