复杂围岩大断面浅埋隧道开挖方法的数值分析研究  

Study on construction method of shallow tunnel with large section in complex surrounding rock

作　　者：梁海涛 万磊 周海昌 LIANG Hai-tao;WAN Lei;ZHOU Hai-chang(NO.1 ENGINEERING CO,LTD.OF FHEC OF CCCC,Beijing,102205)

机构地区：[1]中交一公局第一工程有限公司,北京市102205

出　　处：《河北建筑工程学院学报》2022年第4期34-38,共5页Journal of Hebei Institute of Architecture and Civil Engineering

摘　　要：以张家口市东太平山隧道项目为研究背景,运用MIDAS GTS/NX数值模拟方法,对CRD法和双侧壁法在对破碎围岩段大断面浅埋隧道的变形控制效果进行分析,从竖向沉降、拱顶沉降、仰拱隆起、水平收敛以及地表沉降五个方面进行比较。研究结果表明:两种方法的主要变形差异体现在拱顶沉降和仰拱隆起两个方面,竖向沉降、水平收敛、地表沉降三个方面相对差异较小。双侧壁导坑法虽然最大拱顶沉降值和最大仰拱隆起值略大于CRD法,但双侧壁导坑法对比CRD法在前期的变形控制更加优秀,综合考虑在破碎围岩段大断面浅埋隧道中使用双侧壁导坑法更优。Taking Dongtaipingshan tunnel project in Zhangjiakou city as the research background,MIDAS GTS/NX numerical simulation method is used to analyze the deformation control effect of CRD method and double-wall method in large section shallow buried tunnel of broken surrounding rock section,and the comparison is made from five aspects of vertical settlement,vault settlement,invert uplift,horizontal convergence and surface settlement.The results show that the main deformation differences between the two construction methods are reflected in the two aspects of vault settlement and invert uplift,and the three aspects of vertical settlement,horizontal convergence and surface settlement are relatively small.Although the maximum vault settlement value and the maximum invert uplift value of the double-sidewall admittance method are slightly larger than that of the CRD method,the double-sidewall admittance method has better deformation control in the early stage than the CRD method.Considering comprehensively,the double-sidewall admittance method is better in the large-section shallow-buried tunnel in the broken surrounding rock section.

关 键 词：大断面浅埋隧道 复杂围岩 数值分析 开挖方法 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]