施工期铁路隧道软岩大变形快速分级方法研究
Research on the Rapid Classification Method for Large Deformation of Soft Rock in Railway Tunnel Excavation Sections
张广泽 1贾哲强 1罗良成 1王栋 1任利 2袁传保1
作者信息
- 1. 中铁二院工程集团有限责任公司,成都 610031
- 2. 四川大学深地科学与工程教育部重点实验室,成都 610065
- 折叠
摘要
研究目的:西南复杂艰险山区等典型构造活跃区的构造地质环境复杂,断裂、褶皱发育,构造应力显著,铁路隧道围岩大变形问题突出,随着构造活跃区铁路隧道工程日益增加,将面临更严峻的大变形问题.在隧道施工开挖过程中,快速判别可能发生的大变形等级,有利于施工工法的调整和支护措施的制定.研究结论:(1)深入分析构造软岩大变形工程案例,以施工期掌子面开挖揭示围岩分级数据为基准,结合区域地应力、岩层厚度、岩性等大变形关键控制因素,快速判定大变形等级,提出了施工期铁路隧道围岩大变形快速分级方法,并结合典型工程案例对分级方法的有效性和准确性进行了验证;(2)本研究成果可应用于施工期间铁路隧道开挖围岩大变形的快速分级,适用于工程地质勘察领域.
Abstract
Research purposes:The geological environment of typical tectonic active areas such as complex and difficult mountainous areas in Southwest China is complex,with developed faults and folds,significant structural stress,and prominent deformation problems of railway tunnel surrounding rock.With the increasing number of railway tunnel projects in tectonic active areas,they will face more severe large deformation problems.During the excavation process of tunnel construction,quickly identifying the possible level of large deformation is beneficial for adjusting construction methods and formulating support measures.Research conclusions:(1)Through in-depth analysis of engineering cases of large deformation in soft rock,based on the classification data of surrounding rock revealed by excavation of the working face during construction period,combined with key control factors of large deformation such as regional geostress,rock thickness,and lithology,the large deformation level is quickly determined,a fast classification method for large deformation of surrounding rock in railway tunnels during construction period is proposed,and its validity and accuracy are verified by typical engineering cases.(2)The research results can be applied to the rapid classification of large deformation of surrounding rock during railway tunnel excavation during construction,and are suitable for the field of engineering geological exploration.
关键词
构造活跃区/铁路隧道/软岩大变形/快速分级Key words
tectonic active region/railway tunnel/soft rock large deformation/rapid classification引用本文复制引用
基金项目
国家自然科学基金(U19A20111)
西藏自治区科技计划重点研发计划(XZ202201ZY0021G)
中铁二院工程集团有限责任公司科技开发计划(KYY201900319-22)
中铁二院工程集团有限责任公司科技开发计划(KSNQ200002)
中铁二院工程集团有限责任公司科技开发计划(KDNQ212035)
中铁二院工程集团有限责任公司科技开发计划(KDNQ213036)
出版年
2024
NETL
NSTL
万方数据