施工工法对双线暗挖隧道应力位移影响研究  

Study on Stress and Displacement of Double-line Underground Tunnel Influenced by Construction Method

作　　者：黄博 曾宇 邹煜 韩高彬 杜怡韩 曹兵 HUANG Bo;ZENG Yu;ZOU Yu;HAN Gaobin;DU Yihan;CAO Bing(School of Architecture and Civil Engineering,Anhui Polytechnic University,Wuhu Anhui 241000,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China;Engineering Department,Beijing Railway Construction Co.,Ltd.of China Railway Sixth Group Co.,Ltd.,Beijing 100036,China)

机构地区：[1]安徽工程大学建筑工程学院,安徽芜湖241000 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]中铁六局集团北京铁路建设有限公司工程部,北京100036

出　　处：《安徽理工大学学报（自然科学版）》2021年第4期35-41,共7页Journal of Anhui University of Science and Technology:Natural Science

基　　金：安徽省高等学校自然科学研究项目(KJ2018A0108,KJ2018A0118);国家级大学生创新创业训练计划项目(202010363117);安徽工程大学国家基金预研项目(2019yyzr08);安徽工程大学校级科研项目(Xjky110201912)。

摘　　要：为了研究施工工法对双线暗挖隧道应力、位移分布规律的影响,以北京地铁一双线暗挖隧道为研究对象,设计了不同开挖错距的两大类开挖方案,涉及全断面法、台阶法和CD法3种施工工法,利用数值模拟的方法重点分析了采用不同施工工法时,隧道区域应力场和位移场的分布。结果表明CD法开挖引起的应力集中现象最不明显,特征平面应力集中系数最小仅为1.227,开挖引起的地表沉降、特征平面沉降及关键测点总体变形均最小;两大类方案之间比较,结果差异主要体现在位移方面,尤其是CD法引起的变形量,第二大类方案显著高于第一大类,说明开挖错距较短时,CD法同时施工的导洞数多,相互之间扰动影响明显;综合应力和位移分析结果,CD法为最优施工工法。In order to study stress and displacement law of double-line underground tunnel influenced by construction method,a certain running tunnel of Beijing subway was served as research object.Two types of excavation schemes with different excavation alternate distance were designed,which involved three different construction methods,the full-face method,bench method,and CD method.The influences of different construction methods on the stress and displacement distribution in the tunnel area were emphatically analyzed by numerical simulation.The results show the following facts.The stress concentration phenomenon caused by CD method is the least obvious,and the minimum stress concentration factor of the characteristic plane is only 1.227.The deformation of the surface,characteristic plane,and key monitoring points caused by excavation are the minimum when the CD method used.By comparing the two types of schemes,the differences of results are mainly reflected in displacement,especially the deformation caused by the CD method.The second type of scheme is significantly higher than the first,which indicates that when the excavation alternate distance is relatively short,there are many pilot tunnels constructed by the CD method at the same time,and the mutual disturbance influence is significant.According to the analysis results of stress and displacement,the CD method is the best construction method.

关 键 词：双线隧道开挖 应力分布 位移分布 数值模拟 施工工法 

分 类 号：TU94[建筑科学—建筑技术科学]