深厚软土基坑开挖中预留土台对桩锚支护结构的作用效应分析

Analysis of Effect of Reserved Soil Platform on Pile-Anchor Retaining Structure in Deep Soft Soil Excavation

以某小区地下室基坑支护为背景,选取某一支护剖面为研究对象,借助某基坑设计软件分析了坑内有无土台对桩锚支护结构内力变形、地表沉降、整体稳定及抗倾覆的影响。结果表明,预留土台对桩锚支护结构内力变形、地表沉降较无土台时均有显著改善,尤其是锚杆内力与地表沉降,但对基坑整体稳定及支护桩抗倾覆改善不大,可供类似工程借鉴。

This article analyzes the influence of the presence or absence of soil platforms in the pit on the internal force deformation,surface settlement,overall stability and anti-overturning of the pile-anchor support structure,taking the foundation pit support of a residential area as the background,a certain supporting section as the research object,with the help of a foundation pit design software.The results show that the remain mound can significantly improve the internal force deformation and surface settlement,especially the internal force of anchor rod and surface settlement,but it has no remarkable effect on the overall stability of foundation pit and anti-overturning of retaining pile.This can be used as a reference for similar projects.