软土地层土压平衡式盾构盾尾有限元分析及优化对策

邵成猛

doi:10.3973/j.issn.1672-741X.2017.S1.005

隧道建设 >

2017 , Vol. 37 >Issue S1: 26 - 31

DOI: https://doi.org/10.3973/j.issn.1672-741X.2017.S1.005

研究与探索

软土地层土压平衡式盾构盾尾有限元分析及优化对策

邵成猛

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中国铁建十六局集团有限公司，北京 100018）

邵成猛（1979—），男，江苏盐城人，2002年毕业于石家庄铁道学院，土木工程专业，本科，高级工程师，主要从事城市轨道交通土建工程技术研究及管理工作。Email: supercheng2007@163.com。

收稿日期: 2017-01-17

修回日期: 2017-03-31

网络出版日期: 2017-05-27

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Finite Element Analysis and Optimization Countermeasures for Shield  Tail of Earth Pressure Balanced Shield in Soft Stratum

SHAO Chengmeng

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(China Railway 16th Bureau Group Co., Ltd., Beijing 100018, China)

Received date: 2017-01-17

Revised date: 2017-03-31

Online published: 2017-05-27

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摘要

盾构在施工时，盾尾往往要承受大量的水土压力和自重载荷，这些载荷作用在盾尾产生一定的形变量。当形变量超过设计要求时，会造成一定的工程事故。针对软土地层中盾构的工况进行分析，确定盾构掘进过程中盾尾所受载荷。建立三维有限元模型，然后进行计算分析。根据分析结果对盾尾结构进行改进：盾尾采用6点注浆法代替传统的4点注浆法，并对有限元软件进行分析计算，对比6点注浆法和4点注浆法盾尾的分析结果。结果表明，6点注浆法能很好地减少盾尾的形变量，提高了盾构施工质量。

关键词： 软土地层; 土压平衡盾构; 盾尾; 载荷分析; 有限元分析; 应力应变

本文引用格式

邵成猛 . 软土地层土压平衡式盾构盾尾有限元分析及优化对策[J]. 隧道建设, 2017 , 37(S1) : 26 -31 . DOI: 10.3973/j.issn.1672-741X.2017.S1.005

Abstract

The shield tail bears large water pressure and dead load during shield tunneling, which would induce shield tail deformation. Incidents would be occurred when the shield tail deformation is beyond design requirement. The loads on shield tail during shield tunneling are analyzed, and 3D finite element model is established and calculated. The shield tail structure is optimized by replacing 4 grouting holes by 6 grouting holes, and finite element software is used to analyze the construction cases respectively. The analytical results show that the shield tail deformation is reduced and the shield tunneling quality is improved by adopting 6 grouting holes.

Key words： soft stratum; EPB shield; shield tail; load analysis; finite element analysis; stress and strain

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