“新奥法”在东江—深圳供水改造工程观音山隧洞施工中的应用

The application of NATM to Guan Yin Shan tunnel construction in Dongjiang-Shenzhen supply modification works

在东江—深圳供水改造工程观音山隧洞施工中 ,以“新奥法”理论为指导 ,运用联合支护和围岩量测等技术 ,成功地穿越了洞口不良地质段 .在Ⅱ、Ⅲ类围岩的施工中 ,取得良好的爆破效果 .对联合支护的参数、光面爆破的参数确定 ,围岩和支护结构变形的管理进行了探讨 .

In Guan Yin Shan tunnel construction of Dongjiang Shenzhen water supply modification works, based on the theory of NATM, by employing the techniques such as joint supports and wall rock measurement, the bad geologic sections within the tunnel portals have been successfully cut through. In the construction of types Ⅱ and Ⅲ wall rocks, good explosive results have been achieved. This paper discusses the definition of joint support and smooth blasting parameters and the management of wall rock and support structure deformations.