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山东大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 47-54.doi: 10.6040/j.issn.1672-3961.0.2017.040

• 土木工程——隧道与地下工程专题 • 上一篇    下一篇

极浅埋富水砂层地铁横通道注浆加固与开挖稳定性

夏梦然1,李卫2,冯啸2,朱光轩2,李夏2   

  1. 1. 中铁工程设计咨询集团有限公司, 北京 100055;2. 山东大学岩土与结构工程研究中心, 山东 济南 250061
  • 收稿日期:2017-01-19 出版日期:2017-04-20 发布日期:2017-01-19
  • 作者简介:夏梦然(1989— ),女,河南洛阳人,助理工程师,主要研究方向为地下工程结构.E-mail:834760830@qq.com

Grouting reinforcement and excavation stability on super-shallow buried and water-rich sand stratum subway transverse channel

XIA Mengran1, LI Wei2, FENG Xiao2, ZHU Guangxuan2, LI Xia2   

  1. 1. China Railway Engineering Consulting Group Co., Ltd., Beijing 100055, China;
    2. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, Shandong, China
  • Received:2017-01-19 Online:2017-04-20 Published:2017-01-19

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摘要： 针对极浅埋富水砂层地铁隧道横通道可能出现的施工安全问题,采用室内实验、理论分析及数值模拟的方法,对隧道进行注浆加固试验及开挖工法的优选,提出一套适用于浅埋富水砂层横通道的注浆加固工艺及开挖工法。认为注浆加固可有效提高砂层的物理力学参数和土体力学性能;支护时间越迟,围岩变形越大,预加固可有效提高围岩的物理力学参数,降低围岩变形,改善地层的应力—应变关系;对台阶法与CRD(交叉中隔墙法)法开挖后拱顶沉降、应力及塑性区分布特征进行了对比分析,通过现场开挖监测量控与数值分析的对比,验证了该工艺的可行性,该研究可为类似工程提供一定的借鉴和指导作用。

关键词: 暗挖法, 注浆加固, 开挖稳定性, 极浅埋富水砂层, 数值模拟

Abstract: Against the construction safety of super-shallow buried and water-rich subway transverse channel, laboratory experiments, theoretical analysis and numerical simulation were conducted to select the proper grouting parameter and excavation method, and a series of grouting and excavation method were put forward. Grouting reinforcement could effectively improve the mechanical parameters of sand layer and mechanical properties of soil. The later the support time was, the greater deformation of surrounding rock would be. Pre-reinforcement could effectively improve the physical and mechanical parameters of surrounding rock, reduce the deformation of surrounding rock, and improve the stress-strain relationship. Vault settlement, stress and plastic zone distribution characteristics analysis of excavation step method and CRD(Cross Diaphragm)method were compared, and feasibility of the method was determined. The research results could provide certain references to similar projects.

Key words: undercutting method, super-shallow buried and water-rich sand stratum, numerical simulation, grouting reinforcement, excavation stability

中图分类号: 

  • TD45
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