Study on the Influence of Pre-Stress of Steel Support on Deformation of Ground Connecting Wall in Foundation Pit Engineering

ce/papers Pub Date : 2025-03-18 DOI:10.1002/cepa.3145

Xiaopeng Zhao, Bairong Zhong, Kunyong Zhang, Zihao Li

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Abstract

In the process of excavation, the soil pressure on both sides of the foundation pit gradually increases, which will cause deformation of the enclosure structure. Steel support plays an active role in reducing the deformation of the enclosure structure. In order to explore the influence of pre-stress of steel support on the deformation of ground connecting wall in foundation pit engineering, this paper takes a subway foundation pit under construction in Nanjing Metro as an example by numerical simulation, and discusses the change law of ground connecting wall during excavation and the influence of steel support on the maximum deformation of ground connecting wall under different pre-stress. The analysis shows that with the increase of excavation depth, the displacement of ground connecting wall increases gradually. When the axial stress of the steel support is applied, the deformation of the enclosure structure can be effectively reduced. When the axial stress of the steel support is increased, the maximum displacement of the ground connecting wall gradually decreases, which is approximately linear.

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基坑工程中钢支架预应力对地连墙变形的影响研究

在开挖过程中，基坑两侧土压力逐渐增大，会引起围护结构变形。钢支撑对减小围护结构的变形起着积极的作用。为了探讨基坑工程中钢支架预应力对地接墙变形的影响，本文以南京地铁某在建地铁基坑为例，通过数值模拟，探讨了开挖过程中地接墙变形的变化规律，以及不同预应力下钢支架对地接墙最大变形的影响。分析表明，随着开挖深度的增加，地面连接墙的位移逐渐增大。当施加钢支撑的轴向应力时，可以有效地减小围护结构的变形。随着钢支撑轴向应力的增大，地接墙的最大位移逐渐减小，近似为线性减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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