Research on mechanical characteristics of metro shield tunnel segment in sandy strata

HE Chuan; ZENG Dong-yang

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Research on mechanical characteristics of metro shield tunnel segment in sandy strata

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- Research on mechanical characteristics of metro shield tunnel segment in sandy strata
- Vol. 28, Issue 5, (2007)
- 作者机构：
  
  1. 西南交通大学地下工程系,成都,610031
  2. 中交第一公路勘察设计研究院,西安,710075
- 作者简介：
- 基金信息：
- DOI：
  CLC： U451
- Online First：10 September 2013，
  
  Published：2007
- 稿件说明：
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HE Chuan, ZENG Dong-yang. Research on mechanical characteristics of metro shield tunnel segment in sandy strata[J]. 2007, 28(5).
DOI：

HE Chuan, ZENG Dong-yang. Research on mechanical characteristics of metro shield tunnel segment in sandy strata[J]. 2007, 28(5). DOI：

摘要

以南京地铁一号线穿越砂性地层盾构隧道为研究对象，对管片环施工全过程和稳定期进行了现场系统研究。采用考虑结构与地层相互作用的梁-弹簧模型进行理论计算，探讨了砂性地层中盾尾注浆、土体应力松弛、水压力及拼装方式对管片环土水压力、纵缝张开量、内力等的分布和变化规律的影响，揭示了砂性地层中地铁盾构隧道管片环的结构性能及其与地层的相互作用特性，提出了适用于砂性地层条件下的地铁盾构隧道设计原则与方法。

Abstract

Based on the Nanjing metro shield tunnel traversing sandy strata

systematic in-situ investigation and theoretical simulation of the beam-spring model with consideration of the interactions between lining structure and surrounding soil during the segment assembly and stabilization are carried out. Influences of the shield tail serum injection

soil stress relaxation

water pressure and segment ring assembly on the distributions and varying laws of sandy strata segment ring soil pressure

the longitudinal joint gap and internal forces are discussed. The characteristics of the interactions between shield tunnel segment and the sandy strata are investigated. The applicable principle and method for metro shield tunnel segment design in sandy strata are also proposed.

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