黑龙江科技大学学报2025，Vol.35Issue(1)：123-130,146,9.DOI:10.3969/j.issn.2095-7262.2025.01.019
渗流作用对预应力鱼腹梁深基坑受力与变形的影响
Influence of seepage on stress and deformation of deep foundation pit of prestressed fish-belly beam
赵延林 1朱利华 1曹岩 1王可1
作者信息
- 1. 黑龙江科技大学 建筑工程学院,哈尔滨 150022
- 折叠
摘要
Abstract
This paper is intended to investigate the influence of seepage on the stress and deformation of deep foundation pit of prestressed fish-belly beam.The study is accomplished by establishing a three-dimensional numerical analysis model of dewatering excavation of deep foundation pit of prestressed fish-belly beam based on fluid-solid coupling theory by using Midas GTS in combination with actual engineer-ing monitoring data,and simulating and analyzing the influence law behind seepage on the stress and de-formation of deep foundation pit of prestressed fish-belly beam.The results show that the seepage has a significant effect on the deformation of foundation pit and the stress of the retaining pile and fish-belly beam support system,among which the surrounding surface settlement is affected most by seepage,the deformation of the retaining pile and the uplift of the pit bottom is affected more by seepage,and the in-ternal force of the retaining pile and fish-belly beam support system is affected relatively little.The seep-age increases the maximum surface settlement by 71.6%,the settlement range more than 1 times,and the most sensitive area to seepage is the surface beyond 1.3H from the edge of foundation pit.The maxi-mum horizontal displacement of the supporting pile and the maximum uplift displacement of the pit bottom increase by 36.8%and 22.8%,respectively.The seepage has little effect on the upper corner brace and the opposite axial force,while the lower corner brace and the opposite axial force and the bending mo-ment of the retaining pile,with an average increase of about 10%.关键词
预应力鱼腹梁/深基坑/渗流作用Key words
prestressed fish-belly beam/deep foundation pit/seepage effect分类
土木建筑引用本文复制引用
赵延林,朱利华,曹岩,王可..渗流作用对预应力鱼腹梁深基坑受力与变形的影响[J].黑龙江科技大学学报,2025,35(1):123-130,146,9.
