既有车站下超近接区间隧道支护技术  

Support technology of ultra-close interval tunnel under existing station

作　　者：赵佩坤 谢宏强 王港 ZHAO Peikun;XIE Hongqiang;WANG Gang(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101

出　　处：《计算机辅助工程》2023年第3期66-71,共6页Computer Aided Engineering

摘　　要：为减小既有车站下超近接区间隧道施工时引起的沉降,利用MIDAS GTS数值模拟软件,对既有车站下超近接区间隧道开挖支护技术展开研究,对比4种工况下的地表沉降、既有车站沉降和既有车站受力状况。结果表明:将超前管棚支护与超前注浆加固结合时,地表沉降与既有车站沉降分别控制在3.0和6.4 mm,既有结构最大拉应力仅为1.35 MPa,实测数据与模拟结果吻合,可为同类型工程提供参考。In order to reduce the settlement caused by the construction of the ultra-close interval tunnel under the existing station,the excavation support technology of the ultra-close interval tunnel under the existing station is studied by using the MIDAS GTS numerical simulation software,and the surface settlement,the settlement of the existing station and the stress condition of the existing station are compared under four working conditions.The results show that when the advanced grouting reinforcement is combined with the advanced pipe shed support,the surface settlement and the settlement of the existing station are controlled at 3.0 mm and 6.4 mm,and the maximum tensile stress of the existing structure is only 1.35 MPa,and the measured data are consistent with the simulation results,which can provide a reference for the same type of project.

关 键 词：超近接区间隧道 超前注浆加固 超前管棚支护 数值模拟 现场实测 沉降 

分 类 号：U455.49[建筑科学—桥梁与隧道工程] TB115.1[交通运输工程—道路与铁道工程]