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隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (8): 1303-1310.DOI: 10.3973/j.issn.2096-4498.2018.08.006

• 研究与探索 • 上一篇    下一篇

机械化施工大断面高铁隧道围岩压力测试及分布特征研究

于丽1, 2, 王志龙1, 2, 杨涅1, 2   

  1. (1. 西南交通大学交通隧道工程教育部重点实验室, 四川 成都 610031; 2. 西南交通大学土木工程学院, 四川 成都 610031)
  • 收稿日期:2018-04-16 修回日期:2018-07-08 出版日期:2018-08-20 发布日期:2018-09-04
  • 作者简介:于丽(1978—),女,辽宁大连人,2009年毕业于西南交通大学,桥梁与隧道工程专业,博士,副教授,主要从事隧道与地下结构设计理论和防灾救援技术的研究与教学工作。Email: yuli_1026@163.com。
  • 基金资助:

    中国铁路总公司科技研究开发计划课题(2017G007-F, 2017G007-H)

Study of Measurement and Distribution Characteristics of Surrounding Rock Stress of Large Crosssectional Highspeed Railway Tunnel with Mechanized Construction

YU Li1, 2, WANG Zhilong1, 2, YANG Nie1, 2   

  1. (1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Sichuan 610031, Chengdu, China; 2. School of Civil Engineering, Southwest Jiaotong University, Sichuan 610031, Chengdu, China)
  • Received:2018-04-16 Revised:2018-07-08 Online:2018-08-20 Published:2018-09-04

摘要:

为了解机械化施工大断面隧道围岩压力的变化规律和分布特征,依托郑万高速铁路湖北段大型机械化施工隧道群,开展大量围岩压力现场监测,根据测试结果对Ⅳ级和Ⅴ级深埋条件下围岩压力变化规律和分布特征进行分析,并与规范荷载进行对比。结果表明: 1)围岩压力监测数据从21~27 d开始稳定; 2)实测围岩压力小于《铁路隧道设计规范》深埋隧道计算荷载; 3)Ⅳ级深埋条件下,侧压力系数为规范荷载侧压力系数的1.2~2.4倍; 4)Ⅴ级深埋条件下,侧压力系数为规范侧压力系数的0.86~1.43倍。

关键词: 大断面隧道, 机械化施工, 围岩压力, 侧压力系数, 监控量测

Abstract:

A large amount of field measurement on surrounding rock stress of tunnel group on Hubei Section of ZhengzhouWanzhou Highspeed Railway with mechanized construction are carried out to learn the variation laws and distribution characteristics of surrounding rock stress of large crosssectional highspeed railway tunnel with mechanized construction. And then the surrounding rock stress variation laws and distribution characteristics of surrounding rock stress in Grade Ⅳ and Grade Ⅴ deepburied conditions are analyzed and compared with standard loads based on measurement results. The study results show that: (1)The stabilizing time of surrounding rock stress starts on the 21st to the 27th day. (2)The measured surrounding rock stress is less than the calculated load of deepburied tunnel in related railway design codes. (3)Under the condition of Grade Ⅳ depth, the lateral pressure coefficient is 1.2-2.4 times that of standard load. (4)Under the condition of Grade Ⅴ depth, the lateral pressure coefficient is 0.86-1.43 times that of standard load.

Key words: large crosssectional tunnel, mechanized construction, surrounding rock stress, lateral pressure coefficient, monitoring and measurement

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