山东建筑大学学报2025，Vol.40Issue(2)：11-19,9.DOI:10.12077/sdjz.2025.02.002
水平掏土纠倾孔周卸荷响应与破坏模式研究
Study on unloading response and failure mode around horizontal excavation hole for building rectification
摘要
Abstract
Building inclination is commonly rectified using horizontal excavation techniques.However,the stress and displacement fields around small holes are challenging to continuously and accurately characterize through field measurements,and research on the failure modes of surrounding soil remains scarce.This study simplifies horizontal excavation as a plane strain problem and employs finite element methods to investigate the unloading response around small holes,thereby elucidating the rectification mechanism.The results demonstrate that hole-digging induces stress redistribution in the surrounding soil:vertical stresses above and below the holes decrease,while vertical stresses in the soil strips between adjacent holes increase.This stress redistribution intensifies with reduced hole spacing.Displacements near the holes are dominated by inward elastic rebound,whereas the central regions of soil strips exhibit compressive deformation due to stress concentration.Deformation at the foundation base primarily occurs within the soil layer above the holes,with magnitudes significantly smaller than field-measured values.X-shaped shear failure develops around the holes and ultimately connects along the horizontal plane of the excavation.As hole spacing decreases,the plastic failure zones surrounding the holes continuously evolve due to stress redistribution.关键词
水平掏土/卸荷响应/应力重分布/破坏模式Key words
horizontal excavation/unloading response/stress redistribution/failure mode分类
土木建筑引用本文复制引用
肖俊华,杨凡,高翔,刘国辉,孙剑平..水平掏土纠倾孔周卸荷响应与破坏模式研究[J].山东建筑大学学报,2025,40(2):11-19,9.基金项目
国家自然科学基金重点项目(52038006) （52038006）
山东建筑大学工程鉴定加固研究院有限公司校企联合横向课题(H19228Z,H19233Z) （H19228Z,H19233Z）
