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孙国茹¹  ,  孟卫杰²  ,  孙津津¹  ,  丰土根^{2 , 3}  ,  王    威⁴  ,  张   箭²

( 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)

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。

关键词：盾构施工 ；下穿铁路 ；路基沉降 ；数值模拟

中图分类号：U455 . 43             

文献标志码：A            

文章编号： 1005- 8249  (2025)  02- 0124- 07

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.021

 

SUN Guoru¹  ,  MENG Weijie² ,  SUN Jinjin¹  ,  FENG Tugen², ³ ,  WANG Wei⁴ ,  ZHANG Jian²

(1 . China Power Construction Railway Construction Investment Group Co . ,  Ltd . ,  Beijing 100070 ,  China;

2. Key Laboratory of Ministry of Education for Geomechanics and E mbankment Engineering ,  Hohai University ,

Nanjing 210098 ,  China;  3 . School  of Civil Engineering and Surveying & Mapping Engineering ,  Jiangxi

University of Science and Technology ,  Ganzhou 341000 ,  China;  4. Beijing Urban Construction Zhongnan

Civil Engineering Group Co . ,  Ltd . ,  Beijing 100023 ,  China)

Abstract: 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 6.1mm 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 2m. 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.

Key words: shield construction; underpassing railroad; roadbed settlement; numerical simulation

基金项目： 国家自然科学基金  (52378336) 。

作者简介：孙国茹  (1983—) ,  男，本科，高级工程师，研究方向： 交通工程。

通信作者： 张   箭  (1989—) ,  男，博士，教授，研究方向：岩土与地下工程稳定及低碳智能开发。

收稿日期：2024 - 10 - 12