| 吕超,张鹏,何俊澜,黄俊阁,王盛鑫.断层带综合地质勘察方法及隧洞围岩变形模拟研究[J].矿产勘查,2022,13(1):122-129 |
| 断层带综合地质勘察方法及隧洞围岩变形模拟研究 |
| Comprehensive geological survey method for fault zone and simulation study on tunnel surrounding rock deformation |
| 投稿时间：2020-10-29 |
| DOI：10.20008/j.kckc.202201015 |
| 中文关键词: 断层带 引水隧洞 地质勘察 有限元 支护措施 |
| 英文关键词: fault zone diversion tunnel geological survey finite element supporting measures |
| 基金项目: |
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| 中文摘要: |
| 复杂的地质条件往往给隧洞开挖造成较大困难,详细准确地查明地质条件是隧洞工程顺利开展的基础。文章以广西桂中乐滩水库引水隧洞工程为背景,通过地质测绘、物探、钻探等综合手段查明该断层附近隧洞沿线的地质条件,并采用有限元方法进行数值模拟,得到了隧洞开挖和支护前后的应力及变形状态,有针对性地对TBM施工过程中,围岩的稳定性进行了分析。结果表明,受断层破碎带影响,隧洞顶及洞侧应力集中现象尤为明显,对工程开展非常不利,据此,工程采取了合理有效的支护措施加固围岩,保障了工程顺利进行,对今后隧洞工程进行相关模拟分析和施工方法的选取有重要参考价值。 |
| 英文摘要: |
| Complicated geological conditions often cause great difficulties for tunnel excavation.Detailed and accurate identification of geological conditions is the basis for the successfully execute of tunnel projects.In this paper,taking the Letan Reservoir diversion tunnel project in Guangxi,Guizhong as the background,the geological conditions along the tunnel near the fault have been investigated through comprehensive methods such as geological surveying,geophysical prospecting,and drilling.The finite element method is used to simulate the stress and deformation of the tunnel during excavation in different stages.It also analyzes the stability of the surrounding rock during the TBM construction process.Results showed,affected by the fracture zone,the stress concentration phenomenon on the roof and side of the tunnel was particularly obvious.It’s so unfavorable to excavate tunnel.According to the results,the project adopted reasonable and effective support measures to strengthen the surrounding rock and ensured the smoothly progress of the project.It has significant reference value for related simulation analysis and selection of construction methods for tunnel projects in the future. |
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