浅析东坞水库岩石洞壁大口径管槽爆破开挖施工技术

Brief analysis on blasting excavation construction technique of large diameter pipe groove in Dongwu Reservoir rock cave wall

为解决在东坞水库岩石洞壁开挖管槽的技术难题,研究借鉴了隧洞洞挖和平面槽挖两种开挖工艺。通过分析项目难点,以及方案比选,最终确定采用沿隧洞纵向开挖管槽、分段钻孔、控制爆破、减少震动的开挖工艺。该工艺保证了隧洞围岩的稳定,加快了施工进度,创造出在岩石洞壁分段槽挖的新技术,可推广应用于边坡陡峭的山区道路开挖工程,避免山体大开挖带来的地质灾害和生态破坏。

Cave wall sectioned drilling,blasting control and shake reduction excavation technologies are adopted in order to solve the technical problems in pipe groove excavation in rock cave wall through referring to tunnel cave excavation and plane groove excavation technology,thereby ensuring stable surrounding rock of the tunnel,accelerating construction progress,and creating new technology of sectioned groove excavation on rock cave wall. The technology can be promoted and applied to excavate mountain roads with steep slope,thereby avoiding geological hazards and ecological damage caused by massive mountain excavation.