宜万铁路齐岳山隧道高压富水断层施工关键技术

摘要： 通过宜万铁路齐岳山隧道F11断层施工，对冻结法、泄能降压法、注浆加固堵水法等施工方法进行比选；经过科研实践总结，优化方案为分水降压和信息化跟踪注浆组合工法，采用泄水洞或平导等附属洞室突水后作为分水降压通道，降低水压,减少突水、突泥风险；再采用信息化跟踪精确注浆加固隧道范围内围岩，快挖快封安全快速通过。解决了岩溶地区隧道高压富水断层快速施工难题，可在类似工程中推广应用。

Key Construction Technology for Qiyueshan Tunnel on Yichang-Wanzhou Railway in Fault Containing Rich High-pressure Water

Regarding the construction of Qiyueshan tunnel on Yichang-Wanzhou railway, which passes through F11 fault, comparison and contrast are made on freezing method, energy-releasing and pressure-reducing method and consolidating and water-blocking grouting method. In the end, the optimized method of water-releasing and pressure-reducing and information-aided grouting is adopted after scientific studies and engineering practice. The water-releasing tunnel and parallel drift are used as water-releasing and pressure-reducing passages to reduce the water pressure and n~nimize the water/mud burst risks. Accurate information-aided grouting is executed to consolidate the surrounding rock mass, which is followed by rapid excavation and rapid sealing so as to tunneling through the fault safely and rapidly. In this way, the difficult problem of rapid tunneling through faults containing rich high-pressure water in karst areas is successfully solved. The technology described in the paper can be promoted for similar works.