砂土地区盾构下穿铁路股道变形影响分析  

Analysis of the Effect of Deformation of Shield Tunnel under Railway Strand in Sandy Soil Area

作　　者：孙国茹 孟卫杰 孙津津 丰土根[2,3] 王威 张箭 SUN Guoru;MENG Weijie;SUN Jinjin;FENG Tugen;WANG Wei;ZHANG Jian(China Power Construction Railway Construction Investment Group Co.,Ltd.,Beijing 100070,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;School of Civil Engineering and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Beijing Urban Construction Zhongnan Civil Engineering Group Co.,Ltd.,Beijing 100023,China)

机构地区：[1]中电建铁路建设投资集团有限公司,北京100070 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [3]江西理工大学土木与测绘工程学院,赣州341000 [4]北京城建中南土木工程集团有限公司,北京100023

出　　处：《粉煤灰综合利用》2025年第2期124-130,共7页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金(52378336)。

摘　　要：盾构下穿铁路施工时,会对土体产生一定扰动,造成铁路路基沉降,影响列车的安全运行。为探究砂土地层双线隧道开挖对铁路股道的变形沉降规律,以南京地铁11号线工程为例,基于Abaqus有限元软件,建立了隧道股道群一体化三维模型,分析施工过程中股道路基沉降影响规律,开展掘进参数敏感性分析,并对加固方案进行对比分析。结果表明:股道群典型股道交5#路基中心最大沉降位于双线隧道中心,最大沉降值为6.1 mm,大于控制值;对隧道进行深孔加固,当径向加固范围为2 m左右时,路基最大沉降值符合控制标准;掌子面压力和注浆压力是影响路基沉降的关键因素,适当的掌子面压力和注浆压力能够有效控制路基沉降变形。When the shield tunnel is constructed under the railway,it will cause certain disturbance to the soil,resulting in the settlement of the railway roadbed and affecting the safe operation of trains.In order to investigate the deformation and settlement law of railway strand in sandy soil stratum double line tunnel excavation,this paper takes Nanjing Metro Line 11 project as an example,based on Abaqus finite element software,establishes an integrated three-dimensional model of tunnel strand group,analyses the settlement influence law of the strand roadbed in the process of construction,carries out the sensitivity analysis of the excavation parameters and conducts a comparative analysis of the reinforcement scheme.The research results show that:the maximum settlement of the roadbed of typical strand crossing 5#is located in the centre of the two-lane tunnel,and the maximum settlement value is 6.1 mm greater than the control value.The tunnel is reinforced with deep holes,and the maximum settlement value of the roadbed meets the control standard after calculation when the radial reinforcement range is about 2 m.Palm surface pressure and grouting pressure are the key factors affecting the settlement of the roadbed,and the appropriate palm surface pressure and grouting pressure can effectively control the settlement and deformation of the roadbed.

关 键 词：盾构施工 下穿铁路 路基沉降 数值模拟 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]