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岩溶隧道施工过程中,常揭露充填型溶腔,造成突水、突泥等地质灾害,开展溶腔超前地质预报与灾害防治工作可有效避免灾害发生.采用超前钻探和隧道地震波法(tunnel seismic prediction,TSP),综合超前地质预报方法对某隧道岩溶发育地区进行充填型岩溶预报,根据预报结论,及时调整和优化了原设计支护方案,采取超前帷幕注浆、超前小导管注浆和超前管棚注浆等超前支护措施加固危险段,制定桩基承担式桥跨方案处理隧道下方充填型溶腔,防止地质灾害发生,减少工程损失,保证隧道施工安全.
In the process of karst tunnel construction, the filling cavern is often uncovered, causing geological disasters such as water inrush and mud disruption, etc. It is effective to prevent the occurrence of disasters by carrying out advanced geologic prediction and disaster prevention and treatment of caverns.Through tunnel drilling and tunnel seismic prediction , TSP), integrated karst development of karst areas of a tunnel prediction karst karst karst area based on the advanced geological prediction method, according to the forecast conclusions, timely adjust and optimize the original design support program, take the leading curtain grouting, leading small pipe grouting and advanced pipe Shed grouting and other advanced support measures to reinforce the dangerous section, the development of pile-supported bridge-span scheme to deal with the filling cavity under the tunnel to prevent geological disasters, reduce project losses and ensure tunnel construction safety.