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高地应力特大断面隧道的适宜施工工法

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为探索高地应力特大断面软岩隧道的适宜施工方法,以桐梓隧道为工程背景,通过现场监测和数值模拟,探索不同高地应力下的3种施工工法[三台阶、CD(cross diaphragm)法、双侧壁导坑法]的适宜性,从围岩变形、施工成本以及施工进度等方面评价施工方法的优劣.结果表明:V级围岩:当隧道埋深为300、400 m时,适用三台阶法施工;当埋深为500 m时,适用CD法施工;当埋深为600 m时,适用双侧壁导坑法施工.Ⅳ级围岩:当隧道埋深为300-600 m时,都适用三台阶法施工.
Appropriate Construction Methods for High-stress Large-section Tunnels
In the quest to explore suitable construction methods for large-scale soft rock tunnels under high ground stress,the Tong-zi Tunnel was used as an engineering background.Through on-site monitoring and numerical simulation,the suitability of three con-struction techniques[three-step method,cross diaphragm(CD)method],double-side wall guiding pit method)under different high ground stresses were explored.The merits and demerits of construction methods were evaluated based on aspects such as surrounding rock deformation,construction cost,and construction progress.The results show for level V surrounding rock when the tunnel buried depth is 300 m to 400 m,the three-step method is applicable.When the buried depth is 500 m,the Cross Diaphragm method is suit-able.When the buried depth is 600 m,the double-side wall guiding pit method is applicable.For level Ⅳ surrounding rock,when the tunnel buried depth is between 300 m to 600 m,the three-step method is applicable in all cases.

high ground stress tunnelsextra large cross-sectionconstruction methodsnumerical simulationsuitability

王义乾、刘远明、田娇、杜碧涛、陈林全、王忠星、牙兰开

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贵州大学土木工程学院,贵阳 550025

贵州省岩土力学与工程安全重点实验室,贵阳 550025

贵州省交通规划勘察设计研究院股份有限公司,贵阳 550008

高地应力隧道 特大断面 施工工法 数值模拟 适宜性

贵州省重大科技专项贵阳城市轨道交通科研项目贵州省自然科学基金贵州省自然科学基金

黔科合重大专项字[2018]3011GD3-FW-YJ-05-2020-13-ZB黔科合基础-ZK[2022]一般082黔科合基础[2019]1057

2024

10.12404/j.issn.1671-1815.2305522

科学技术与工程
中国技术经济学会

科学技术与工程

CSTPCD北大核心
影响因子：0.338
ISSN：1671-1815
年,卷(期)：2024.24(20)
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