轨道交通隧道下穿火车站施工安全影响及控制  

Influence and Control of Construction Safety of Rail Transit Tunnel Under a Railway Station

作　　者：王祥 陈发达 徐文 刘凯 吴贤国[3] 陈彬[3] WANG Xiang;CHEN Fada;XU Wen;LIU Kai;WU Xianguo;CHEN Bin(Guiyang Urban Rail Transit Group Co Ltd,Guiyang 550091,China;College of Architecture and Civil Engineering,Xinyang Normal University,Xinyang 464000,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]贵阳城市轨道交通有限公司,贵州贵阳550091 [2]信阳师范学院建筑与土木工程学院,河南信阳464000 [3]华中科技大学土木与水利工程学院,湖北武汉430074

出　　处：《土木工程与管理学报》2021年第6期82-87,共6页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51378235,71571078,51308240);国家重点研发计划(2016YFC0800208);教育部博士后基金(2015M570645);湖北省自然科学基金(zrz2014000104);武汉市建委科技项目(201414,201619,201334)。

摘　　要：以贵阳市轨道交通1号线火车站站―沙冲路站暗挖区间下穿贵阳火车站及站场施工为工程背景,针对隧道开挖过程中临近建筑及铁路发生移动或变形的问题,采用数值模拟方法对下穿段地应力与区间开挖支护模拟,对下穿站房、站场段施工进行影响分析,结果表明:(1)地表或路基沉降最大值为2.87 mm,满足既有铁路变形控制标准;(2)桩基最大差异变形为4.316 mm,满足既有桩基变形控制标准;(3)暗挖区间修建安全性满足规范标准。由于地下近接施工过程会引起邻近围岩或土体的应力重分布,而铁路轨道和桩基对于变形非常敏感,虽然计算分析满足安全要求,针对本项目的实际情况,采取了开展既有结构状况调查、加强现场监控量测、注浆加固和加强管理联系等安全措施,保证了工程的顺利进行。In order to research the movement or deformation of adjacent buildings and railways in the process of tunnel excavation,the construction of Guiyang Rail Transit Line 1 train station to Shachong Road station under Guiyang railway station and station yard is taken as a case study,and the numerical simulation method is used to simulate the ground stress of the underpass section and the excavation and support of the section and analyze the influence on the construction of the underpass station house and station yard section.The results show that:(1)the maximum surface or subgrade settlement is 2.87 mm,which meets the existing railway deformation control standards;(2)The maximum differential deformation of pile foundation is 4.316 mm,meeting the existing pile foundation deformation control standard;(3)The construction safety of underground excavation section meets the standard.Due to underground near construction process will cause adjacent surrounding rock or soil stress redistribution,and railway tracks and pile foundation is sensitive to deformation,while the calculation and analysis to meet security requirements,according to the actual situation of this project,the safety measures such as the survey of existing structures,strengthen site monitoring measurement,grouting to reinforce and strengthen management links are adopted to ensure the smooth progress of the project.

关 键 词：火车站 数值模拟 开挖支护 沉降 安全控制 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]