隧道穿越断层破碎带的安全施工技术

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Abstract 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．

Key words： fault zone water and mud gushing spoil sliding grouting safe construction

Received: 20 March 2012

PACS:

U455

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I5/45