岩土力学2024，Vol.45Issue(5)：1309-1320,12.DOI:10.16285/j.rsm.2023.0705
荷载作用下砂土边坡-管道相互作用试验研究
Experimental study of sandy slope-pipe interaction under loading
摘要
Abstract
With the rapid development of key projects in China,such as West-to-East Gas Transmission and South-to-North Water Diversion,buried pipelines will inevitably pass through the mountainous area and are affected by regional topography and landforms.However,the interaction mechanism between slope and pipelines is still relatively unclear.In this study,the model tests on sandy slope-pipe interaction under loading are carried out in laboratory based on distributed strain sensing(DSS)and particle image velocimetry(PIV)technologies.The factors influencing the bearing capacity of the foundation are investigated.The failure characteristics of the slope and the structural responses of the buried pipeline are also explored.The research results show that:(1)The slope foundation has undergone three stages:elastic compaction,local shear and overall destruction.The foundation shows asymmetrical wedge-shaped failure pattern.(2)With the increase in slope angle,the ultimate bearing capacity of the foundation decreases.Under the same slope angle,the presence of pipeline reduces the ultimate bearing capacity of the slope foundation.(3)With the increase in slope angle,the influence of the pipeline on the slope failure mechanism increases.(4)Under the loading of the slope,the circumferential strain in the cross-section of the buried pipe is"elliptically"distributed,and an ellipticity calculation formula and a simplified calculation model of the soil resistance around the pipe circumference are proposed.This study can provide a reference for the deformation control and structural design of buried pipelines in sandy slopes.关键词
埋地管道/光频域反射(OFDR)/边坡-管道相互作用/土抗力/模型试验Key words
buried pipeline/optical frequency domain reflectometry(OFDR)/slope-pipe interaction/soil resistance/model test分类
建筑与水利引用本文复制引用
喻文昭,朱鸿鹄,王德洋,谢天铖,裴华富,施斌..荷载作用下砂土边坡-管道相互作用试验研究[J].岩土力学,2024,45(5):1309-1320,12.基金项目
国家杰出青年科学基金项目(No.42225702) （No.42225702）
国家自然科学基金面上项目(No.42077235) （No.42077235）
江苏省研究生科研创新计划项目(No.KYCX22_0162).This work was supported by the National Science Fund for Distinguished Young Scholars of China(42225702),the General Project of National Natural Science Foundation of China(42077235)and the Postgraduate Research & Practice Innovation Program of Jiangsu Province(KYCX22_0162). （No.KYCX22_0162）
