摘要
在基坑工程领域中,抵抗土体位移、减小占地空间的大倾角倾斜桩支撑方法逐步得到应用,但其水平承载特性仍不清晰,亟需相关现场原位试验深入研究。文中通过对浙江省嘉兴市闻川科创园(一期)项目工地基坑工程的9号和11号基坑大倾角倾斜桩支撑开展了现场测试试验,探究了基坑开挖过程中的45°大倾角倾斜桩支撑的桩身弯矩和基坑外侧土体位移。结果表明,开挖深度是影响桩身弯矩的关键因素,随着基坑开挖深度增加,桩身弯矩变大,入土部分桩身受被动土压力影响增大;基坑底面以上土体受主动土压力影响位移变化明显,底面以下相对稳定;要共同考虑组合结构强度来提高基坑工程整体安全性。
In the field of foundation pit engineering,the use of large angle inclined pile support has gradually become a solution to resist soil displacement and reduce land occupation.However,its horizontal bearing characteristics are still unclear,and there is an urgent need for in-depth on-site in-situ testing research.This article conducted on-site testing and experiments on the large angle inclined pile support of the 9th foundation pit and the 11th foundation pit of the Wenchuan Science and Technology Innovation Park(Phase I)project in Jiaxing City,Zhejiang Province,to explore the bending moment of the pile body and the displacement of the soil outside the foundation pit during excavation.The results indicate that excavation depth is a key factor affecting the bending moment of the pile body.As the excavation depth of the foundation pit increases,the bending moment of the pile body increases,and the pile body in the buried part is more affected by the passive soil pressure.The displacement of the soil above the bottom of the foundation pit is significantly affected by active soil pressure,while the soil below the bottom is relatively stable.We need to jointly consider the strength of composite structures to improve the overall safety of foundation pit engineering.
作者
钱辉
张向宇
姜炜
程磊
Qian Hui;Zhang Xiangyu;Jiang Wei;Cheng Lei(Zhejiang Zhejian Industrial Investment Development Co.,Lid.,Hangzhou Zhejiang 310000,China;Zhejiang Zhejian Beautiful Rural Construction Co.,Ltd.,Huzhou Zhejiang 313000,China;Jiaxing Zhejian Canal Bay Development and Construction Co.,Ltd.,Jiaxing Zhejiang 314000,China;Zhejiang University of Technology,Hangzhou Zhejiang 310000,China)
出处
《山西建筑》
2026年第2期92-95,共4页
Shanxi Architecture
基金
闻川科创园(一期)项目基坑支护倾斜桩课题研究(横向)。
关键词
基坑支撑
现场试验
倾斜桩
大倾角
桩身弯矩
土体水平位移
foundation pit support
field trials
inclined pile
large angle
pile-body bending moment
horizontal displacement of soil
