摘要
为研究基坑加固对临近电缆盾构隧道的影响,本文以实际工程为背景,用HSS与HS本构参数建立有限元模型,将计算参数与实测数据进行对比,并对比坑底加固对临近环境的保护作用,运用数值模拟证明了基坑坑底加固减少了支护结构的水平位移,降低临近基坑的地表沉降的现象。同时简化计算模型,根据盾构隧道强烈影响区、显著影响区、一般影响区分成三大类试验,每类试验进行64次有限元模拟,根据计算结果分析得出基坑坑底加固对临近隧道的保护作用规律,并得出最优加固区间。
In order to study the influence of foundation pit reinforcement on adjacent cable shield tunnels,this paper takes the actual engineering as its background,establishes a finite element model with HSS and HS constitutive parameters,compares the calculated parameters with the measured data,and compares the effect of pit bottom reinforcement on the adjacent environment.Numerical simulation proves that the reinforcement of the foundation pit bottom reduces the horizontal displacement of the support structure and the phenomenon of surface settlement near the foundation pit.At the same time,the calculation model is simplified.According to the strong influence area,significant influence area and general influence area of the shield tunnel,it is divided into three types of tests.64 times of finite element simulations are carried out for each type of test.The law of protection effect is obtained,and the optimal reinforcement interval is obtained.
作者
房庆
杨明
张庆
吴勇
杨志浩
张炜
FANG Qing;YANG Ming;ZHANG Qing;WU Yong;YANG Zhihao;ZHANG Wei(Jiangsu Power Design Institute,Co.,Ltd.,China Energy Engineering Group,Nanjing 211102,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2022年第S01期131-137,共7页
Engineering Journal of Wuhan University
关键词
基坑加固
加固区间
数值模拟
盾构影响区
foundation pit reinforcement
reinforcement interval
numerical simulation
shield impact interval
