水资源与水工程学报2023，Vol.34Issue(6)：182-189,199,9.DOI:10.11705/j.issn.1672-643X.2023.06.22
考虑邻近建筑物影响的内撑式排桩基坑支护局部破坏研究
Partial failure behaviors of internal retaining pile row system considering the influence of adjacent buildings
摘要
Abstract
The interactions between the excavation and surrounding environment and the influence of ad-jacent buildings on partial failure of support system are rarely studied and reported.Here,we studied the influence of excavation,partial failure of support and leakage of sandy soil behind the pile on the deform-ation coordination of the foundation pit and supporting system using model test of a foundation pit suppor-ted by internal retaining pile row system with and without adjacent buildings.The results show that affect-ed by neighboring buildings,the horizontal displacement of the retaining pile parallel to the long side of the adjacent building increases with the excavation of the foundation pit,whereas that vertical to the adja-cent building decreases.The axial force of the middle internal support increases greatly,followed by the angular support,while the side support decreases.The bending moment of the retaining pile parallel to the long side of the adjacent building increases,and the reverse bending point moves up,while that verti-cal to the adjacent building is quite the opposite.The ground settlement outside the pit caused by partial support failure is small,whereas that caused by continuous failure of the internal support is significant,and the influence range is 0.12-0.23 times of the excavation depth.The axial force of the adjacent in-tact support increases significantly,which can readily lead to progressive failure.The influence on the bending moment of retaining pile parallel to the long side of the building is greater than that vertical to the adjacent building.When the sand behind the pile leaks,the retaining pile parallel to the long side of the adjacent building decreases more significantly.关键词
基坑/排桩支护/支护桩局部破坏/邻近建筑/模型试验Key words
foundation pit/supporting pile row/local failure of supporting piles/adjacent building/model test分类
水利科学引用本文复制引用
曹卫平,罗龙平,赵敏,赵呈..考虑邻近建筑物影响的内撑式排桩基坑支护局部破坏研究[J].水资源与水工程学报,2023,34(6):182-189,199,9.基金项目
陕西省自然科学基础研究计划项目(2019JM-006) （2019JM-006）
