隧道下穿高水压溶腔区稳定性分析及加固对策
摘要：为保证高水压溶腔区隧道施工安全及隧道后续开挖顺利，结合成贵客运专线铁盔山某区间隧道，对高水压溶腔区的存在危害机理进行分析。高水压溶腔区围岩稳定性差，如未进行有效加固，开挖卸荷和溶腔水压力的双重作用易导致隧道涌水和坍塌。采用以地表袖阀管注浆为主、洞内超前小导管加固为辅的综合处治措施，对该区域的涌水、塌陷等灾害进行治理。注浆加固后，隧道在开挖过程中围岩位移和应力均在安全范围内，可保证隧道顺利通过高水压溶腔区。
关键词：隧道工程高水压溶腔区袖阀管注浆超前小导管力学分析数值模拟
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[2] 李术才，王康，李利平，等.岩溶隧道突水灾害形成机理及发展趋势[J].力学学报，2017,49(1):22-30.
[3] 孙谋，刘维宁.隧道涌水对围岩特性影响分析[J].隧道建设，2008(2):143-147.
[4] 张梅，张民庆，孙国庆.宜万铁路野三关隧道高压富水充填溶腔溃口处理技术[J].铁道工程学报，2010,27(3):81-86.
[5] 张民庆，黄鸿健.齐岳山隧道高压裂隙水注浆堵水技术[J].铁道工程学报，2010,27(1):68-72,103.
[6] 赵善鹏.隧道穿越高压富水断层破碎带施工技术[J].施工技术，2019,48(S1):771-774.
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Stability Analysis and Reinforcement Strategy of Tunnel Under High Water Pressure Solution Cavity
Abstract: In order to ensure the safety of the tunnel construction in the high water pressure cavern area and the smooth subsequent excavation of the tunnel, combined with the Tiekuishan section of the Chengdu-Guizhou passenger dedicated line tunnel, the hazard mechanism of the high water pressure cavern area is analyzed. The surrounding rock around the high water pressure cavern area has poor stability. If effective reinforcement is not carried out, the dual effects of excavation unloading and cavern water pressure can easily cause the tunnel to gush and collapse. The comprehensive treatment measures are mainly based on the grouting of the surface sleeve valve tube and supplemented by the reinforcement of the advanced small catheter in the cave. After grouting and reinforcement, the displacement and stress of surrounding rock during the excavation of the tunnel are both within a safe range, ensuring that the tunnel smoothly passes through the high water pressure cavern area.
Keywords: tunnels; high water pressure cavern area; sleeve valve tube grouting; advanced small catheter; mechanical analysis; simulation
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