岩土工程学报2025，Vol.47Issue(11)：2386-2396,11.DOI:10.11779/CJGE20241006
单侧有限土体非对称基坑受力变形机理试验研究
Experimental study on force and deformation mechanism of asymmetric foundation pit with one-sided finite soils
摘要
Abstract
In the case of an internally supported pit adjacent to structures,an area of limited soil will be formed outside the pit,which will result in an asymmetric soil condition on both sides of the pit.Indoor model tests are used to analyse the main deformation and bearing capacity of the unilateral asymmetric pit with finite soils,and to investigate the mechanism of the overall push-back displacement of the supporting structure triggered by the asymmetric working condition.The test shows that the deformation of the asymmetric pit consists of two parts:that caused by excavation and that caused by the overall push-back displacement of the supporting structure.The overall pushback displacement of the support structure caused by asymmetry on both sides will lead to the increase of deformation on the semi-infinite side of the soil body,the decrease of soil pressure in the active zone,and the constraint of deformation of the support piles on the finite side.In the case of a large degree of asymmetry between the two sides of the pit,the excessive pushback displacement will cause the deformation of the finite side of the soil body towards the outside of the pit,and the deformation of the supporting piles will change significantly.In the case of a large degree of asymmetry,the soil pressure in the active zone of the finite side appears to change in shape and magnitude,and in the case of a smaller degree of asymmetry,only a change in magnitude occurs.Therefore,when the asymmetric condition of unilateral finite soil body occurs in the foundation pit,the influence of pushback displacement should be fully considered,so as to obtain a more reasonable design and construction scheme of foundation pit support.关键词
非对称基坑/有限土体/模型试验/推回位移/受力与变形Key words
asymmetric foundation pit/finite soil/modelling test/push-back displacement/force and deformation分类
建筑与水利引用本文复制引用
林钊睿,蒋亚龙,徐长节,方焘,范晓真,丁海滨,石钰锋..单侧有限土体非对称基坑受力变形机理试验研究[J].岩土工程学报,2025,47(11):2386-2396,11.基金项目
国家重点研发计划项目(2023YFC3009400) （2023YFC3009400）
国家自然科学基金重点项目(52238009) （52238009）
国家自然科学基金面上项目(42377169) （42377169）
国家自然科学基金地区项目(52168048,42267022) （52168048,42267022）
江西省研究生创新专项资金项目(YC2024-B198)This work was supported by National Key R&D Program of China(Grant No.2023YFC3009400),Key Program of National Natural Science Foundation of China(Grant No.52238009),General Program of National Natural Science Foundation of China(Grant No.42377169),Regional Programs of the National Natural Science Foundation of China(Grant Nos.52168048,42267022)and Special Funding Program for Graduate Student Innovation in Jiangxi Province(No.YC2024-B198). （YC2024-B198）
