隧道穿越断层破碎带的安全施工技术

摘要

Research purposes:It is often encountered during tunnel construction that it has to pass through fractured fault zone. The geological hazards, such as water and mud gushing, spoil flowing etc. may occur in construction. This paper discusses on the safe construction techniques for tunnels passing through fractured fault zone when encountering water and mud gushing, spoil sliding etc. And it puts forward the rational solutions to ensure the construction safety, quality and construction period.Research conclusions:Taking Jiubao Tunnel project on Zhang Jiakou - Ji Ning Railway as an example, this paper studies on safe construction techniques for tunnel passing through F3 fractured fault zone and water - rich zone. The rules of " depressurization, dewatering , advance support, safety guarantee" are put forward. It presents that the key point of hazard prevention and safe construction is to solve the problems of high pressure water.%研究目的:隧道工程穿越断层破碎带是施工中经常遇到的问题,它的难点在于容易出现突水、突泥、溜渣等地质灾害.本文对隧道穿越断层时遇到突水突泥溜渣的安全施工技术进行探讨,为安全施工和保证质量与工期探求合理的解决办法.研究结论:本文以张集铁路旧堡隧道为例,对隧道穿越F3断层破碎带及富水区的安全施工技术进行研究,提出了“排水降压、有水必排、岩变我变、超前支护、确保安全”的原则,指出了解决高压水问题是防止灾害发生的关键,为安全施工提供了重要保证.