（1 河北工业大学土木与交通学院， 天津 300401； 2 河北省土木工程技术研究中心， 天津 300401；3 中国铁路设计集团有限公司， 天津 300142）

［摘要］依托天津地铁1号线延长线盾构直接穿越双林站-李楼站区间风机房工程为背景，利用有限元分析软件ABAQUS对其盾构穿越过程进行三维流-固耦合模拟，并与现场监测结果进行对比研究。结果表明：各地下管线沉降的监测值与模拟值基本吻合，有限元模拟过程基本符合实测规律；各管线沉降曲线近似为正态分布曲线，变形主要集中在隧道中轴线附近3倍隧道外径范围内；对于小净距隧道开挖，各管线的最大沉降位置在两隧道中轴线中点附近且略靠近右线隧道处；部分临时回填情况下地连墙的水平位移和洞口附近超孔压变化幅度均略大于全部回填的，而不回填时要明显大于前两者的变化幅度，相对而言，部分临时回填较为经济合理。研究成果将为以后小净距隧道盾构穿越风机房过程的设计施工提供很好的参考价值。

［关键词］小净距隧道； 盾构穿越； 现场监测； 三维流-固耦合模拟

中图分类号：U455-43文献标识码：A文章编号：1002-848X(2018)19-0102-06

Comparative study on field monitoring and numerical simulation of shield tunneling through the airshaft with small interval

Li Yurun1, 2, Zhang Lei1, Zhang Haoliang3

(1 College of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China; 3 China Railway Design Corporation, Tianjin 300142, China)

Abstract:Based on the project of shield passing through airshaft directly at Shuanglin-Lilou section of Tianjin Subway Line 1 extension, the process was simulated with a finite element analysis software ABAQUS using the 3D fluid-solid coupling simulation, besides the data obtained were compared with the field monitoring results. The results indicate that the monitoring figure of underground pipeline settlement coincided with the simulated ones almost, and the results of finite element simulated is consistent well with the law of measured; The settlement data of pipelines follow a normal distribution curve basically, and the deformations mainly distribute within the scope of 3 times tunnel outer diameter near the tunnel axis; In regard to the excavation of tunnel with small interval, the maximum settlement takes place near the axis midpoint, deviating slightly to the right; With the technique of partial temporary backfilling, the horizontal displacement of diaphragm wall and variation range of excess pore water pressure near the tunnel entrance are slightly larger than that of complete backfilling, while the figures of without-backfilling are the largest among these 3 methods. Therefore it is more economic-efficient to employ partial temporary backfilling. The research above will provide reference for the design and construction of shield passing through airshaft for tunnel with small intervals in the future.

Keywords:tunnel with small interval; shield crossing; field monitoring;  3D fluid-solid coupling simulation

*国家自然科学基金项目（51778207），河北省自然科学基金项目（E2018202107）。

作者简介：李雨润，博士，教授，Email: iemlyr7888@hebut.edu.cn。