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张秋实,管连永,李化云,等. 大断面隧道穿越层状围岩段初期支护优化研究[J]. 科学技术与工程, 2020, 20(23): 9561-9566.
ZHANG Qiu-shi,GUAN Lian-yong,et al.Stability Analysis and Optimization of Primary Support on Tunnel Excavation with Soft-hard Interbed Rock[J].Science Technology and Engineering,2020,20(23):9561-9566.
大断面隧道穿越层状围岩段初期支护优化研究
Stability Analysis and Optimization of Primary Support on Tunnel Excavation with Soft-hard Interbed Rock
投稿时间:2020-02-13  修订日期:2020-05-07
DOI:
中文关键词:  层状Ⅴ级泥岩 稳定性分析 初期支护参数 优化
英文关键词:layered v-grade mudstone stability analysis initial support parameters optimization
基金项目:国家自然科学(51608450),教育部春晖计划(Z2016152)
              
作者单位
张秋实 西华大学 土木建筑与环境学院
管连永 四川路航建设工程有限责任公司
李化云 西华大学土木建筑与环境学院
雷中成 西华大学土木建筑与环境学院
梁桥欣 四川路航建设工程有限责任公司
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中文摘要:
      在层状类围岩中进行开挖施工易造成边墙弯曲-溃曲、底鼓以及顶板弯曲等现象的产生。为此,依托重庆市某层状围岩隧道工程,基于该隧道的工程地质特征及地层岩性分布,着重考虑岩层与锚杆夹角之间的关系,采用ANSYS静力有限元数值分析程序,对该隧道层状Ⅴ级泥岩段的受力变形特征进行了模拟分析,并优化了初期支护参数。数值模拟结果显示当取消与岩层夹角为30°以下的锚杆,衬砌及锚杆的受力变化幅度较小。该研究方法及成果建立于实际工况的基础上,运用数值的方法还原现场支护受力状态,相应的分析方法及研究结果可为类似隧道、矿山巷道工程的设计、施工等提供一定的借鉴和参考。
英文摘要:
      Excavation in layered surrounding rocks is liable to cause side wall bending-buckling, bottom drum and roof bending. Therefore, relying on a layered surrounding rock tunnel project in Chongqing, based on the engineering geological characteristics of the tunnel and the lithological distribution of the stratum, focusing on the relationship between the angle between the rock layer and the anchor, using ANSYS static finite element numerical analysis program The stress and deformation characteristics of the layered mudstone section of the tunnel were simulated and analyzed, and the initial support parameters were optimized. Based on comprehensive research results, an optimal plan for the initial support of the layered mudstone section of the tunnel is obtained, that is, the upper step anchor rod with an angle of 30 ° between the anchor rod and the rock layer is eliminated. The research method and results are based on the actual working conditions, and the numerical method is used to restore the on-site support force state. The corresponding analysis methods and research results can provide some reference for the design and construction of similar tunnels and mine roadways.
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