马鹿箐隧道高压富水大体量充填性溶腔处治技术

宜万铁路马鹿箐隧道DK255+978处通过一高压富水隐伏溶腔,先后发生多达19次的突涌水(泥)灾害.在对该高压富水隐伏岩溶的处治中,系统地运用了释能降压原理,释放了溶腔所存储的能量,降低了水土压力对隧道的稳定性影响.释能降压技术主要采取了综合地质预报手段探明溶腔边界、内部充填物特性和分布特征等,并根据溶腔的水压、水量测试结果进行排水系统规划、钻孔泄水,采用控爆措施揭开溶腔,并进行实时预警预报监控.结果表明,运用释能降压技术处治马鹿箐+978溶腔,规避了岩溶溃水的风险,取得了良好的效果.

Study on Treatment Technology Applied to Filled Cavity with Rich Water under Great Pressure in Maluqing Tunnel

Maluqing Tunnel on Yichang-Wanzhou Railway goes through a latent karst cavity with rich water under high hydraulic pressure at the station of DK 255+978,where the mud burst and water inflow disaster have occurred for 19 times.And the technology of energy releasing and pressure reducing is applied to deal with the filled cavity with rich water under great pressure in Maluqing tunnel during its construction,which the energy stored in the cavity is released and the affect of water & soil pressure on tunnel sta...