某深厚软土地区狭长型深基坑考虑空间效应的分段开挖长度研究

A Study on Segmented Excavation Length Considering Spatial Effects for Narrow and Long Deep Excavation in a Deep Soft Soil Area

在软土地区开挖地铁隧道或城市综合管廊等狭长型基坑,应充分考虑其空间效应的影响。本文结合珠海地区某一通道基坑开挖的案例,通过有限元建模分析及现场监测结果,验证了合理的分段开挖长度是狭长型基坑安全开挖的关键,可为后续深厚软土地区狭长型基坑开挖工程提供参考。

When excavating narrow and elongated foundation pits such as subway tunnels or urban comprehensive pipe galleries in soft soil areas,the influence of their spatial effects should be fully considered.This article combines the case of excavation of a certain channel foundation pit in Zhuhai area,and verifies through finite element modeling analysis and on-site monitoring results that a reasonable segmented excavation length is the key to safe excavation of narrow and long foundation pits,which can provide reference for subsequent narrow and long foundation pit excavation projects in deep and soft soil areas.