施工工法对浅埋软岩小净距隧道地表沉降和围岩稳定的影响研究  

Influence of Construction Methods on Surface Subsidence and Surrounding Rock Stability of Shallow Buried Soft Rock with Small-distance Tunnel

作　　者：鲍先凯 杨东伟[1] 段东明 武晋文 BAO Xiankai;YANG Dongwei;DUAN Dongming;WU Jinwen(School of Civil Engineering,Inner Mongolia University of Science & Technology,Baotou,Nei Mongol 014010,China;School of Mines Technology,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;School of Science,North University of China,Taiyuan,Shanxi 030051,China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010 [2]太原理工大学矿业工程学院,山西太原030024 [3]中北大学理学院,山西太原030051

出　　处：《公路工程》2019年第4期22-29,共8页Highway Engineering

基　　金：国家自然基金青年科学基金项目(51504220);内蒙古自然科学基金(2016MS0511)

摘　　要：为了研究施工工法对浅埋软岩小净距隧道变形的影响,通过工程现场实测和MIDASGTS数值分析研究了小净距隧道地表沉降,拱顶沉降,水平收敛和仰拱隆起的变化规律,研究结果表明:双侧壁导坑法对于软岩小净距隧道的地表沉降控制显著;对于水平收敛量,双侧壁导坑法变化量最小,且先行隧道和后行隧道水平收敛的结果基本相同;其他2种工法下的仰拱隆起量是双侧壁导坑法隆起量的5倍以上,并且这2种方法的仰拱隆起规律基本相同;模拟结果与现场实测数据较吻合,且都满足工程监测要求,可以为类似的工程提供借鉴。In order to research the influence on the deformation of shallow hearing soft rock tunnel with small interval under different construction methods.The studied through the engineering site measurement and MIDAS GTS numerical model analyze the change rules ofthe surface subsidence,the settlement of the tunnel vault,the horizontal convergence and the uplift of the inflected arch of the tunnel with small interval.The research results are shown as follows:the double side drift method has significant control for surface subsidence of the shallow hearing soft rock tunnel with small interval.For the horizontal convergence,the change of the double-side wall guide is the smallest,and the horizontal convergence of the tunnel and the backward tunnel is basically the same.As for the uplift of the inflected arch is more than 5 times the amount of the double side drift method,and the rule of the uplift of the inflected arch is same with these two methods basically.The simulation results are consistent with the field test data and meet the engineering monitoring requirements,which can provide a reference for the similar engineering.

关 键 词：施工工法 小净距隧道 数值模拟 变形 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]