复杂周边环境下深基坑开挖监测与变形特性分析  

Monitoring and Deformation Characteristics Analysis of Deep Foundation Pit Excavation in Complex Surrounding Environment

作　　者：李彦睿 Li Yanrui(China Construction Materials Industry Geological Exploration Center Liaoning Headquarters,Shenyang,Liaoning,110004)

机构地区：[1]中国建筑材料工业地质勘查中心辽宁总队,辽宁沈阳110004

出　　处：《江西建材》2023年第5期135-136,139,共3页Jiangxi Building Materials

摘　　要：基坑开挖过程中,地下连续墙的周边地面沉降和位移控制是工程安全面临的主要挑战。文中通过分析监测数据,对基坑开挖过程进行了三维数值模拟,确定支护结构的变形规律等特征。结果表明,地下连续墙周边地表沉降主要受基坑开挖深度影响。此外,每种工况下的壁变形均表现出线性,具有明显的阶段特征,特别是变形曲线具有明显的拐点,大部分拐点位于整体开挖深度的2/3以上。该方法为基坑开挖的安全控制和可持续研究提供了新的参考。The main challenge to engineering safety is to control the surrounding ground settlement and displacement of the underground continuous wall during the excavation process of the foundation pit.This study analyzed monitoring data and conducted three-dimensional numerical simulation of the excavation process of the foundation pit to determine the deformation patterns and other characteristics of the support structure.The results indicate that the surface settlement around the underground continuous wall is mainly affected by the excavation depth of the foundation pit;In addition,the wall deformation under each operating condition exhibits linear characteristics with distinct stages.Especially the deformation curve has obvious inflection points,most of which are located at more than 2/3 of the overall excavation depth.This method provides a new reference for the safety control and sustainable research of foundation pit excavation.

关 键 词：基坑开挖 监测数据 变形 地下连续墙 

分 类 号：P642[天文地球—工程地质学]