基坑扩底承载式斜撑支护变形数值模拟研究

打开文本图片集

中图分类号：TU751 文献标志码：A 文章编号：2096-6717（2025）04-0019-09

Numerical study on deformation of pit tilted strut of concretefilled steel tube with belled bearing base

ZHANG Wengang1，YAN Yumiao1，YUAN Yuntao²，CHEN Chunxia 3 MOU Yunzhen4，LI Yongqin1

（1.School of Civil Engineering，Chongqing University， Chongqing 40o045，P.R.China; 2. Jiangsu Huayan Construction Co.，Ltd.，Suzhou 2l5lOO，Jiangsu，P.R.China;3.China Southwest Geotechnical Investigation& Design Institute Co.， Ltd.， Chengdu 6lO093，P.R.China; 4. Yangtze River Chongqing Navigation Engineering Bureau，Chongqing 40ool0，P.R. China）

Abstract：Botom-bearing steel pipe concrete inclined support technique is a promising method for foundation pit excavation. While its efectivenessis evident in various engineering cases，its underlying mechanismrequires further investigation.This study establishes a numerical modelusing finite element simulation，validated against monitoring data from specific projects. It explores the deformation of the inclined support during excavation， revealing insights into its performanceunderdiferent soil conditions and tilt angles.Findings indicate significant control over soil and support deformation，especially in soft soil areas. Increasing thetilt angle enhances lateral force resistance but raises project costs.Thus，selecting the appropriate angle is crucial based on specific project needs and soil conditions.

Keywords： excavation； finite element; belled bearing base；ground settlement，basal heave

随着城市地下空间的发展，深基坑工程的建设技术不断进步，其设计方法不断改进，施工水平也不断提高。（剩余13884字）