水电站地下厂房开挖支护关键技术研究(3)

Study on key technical of excavation and support of underground

powerhouse in hydroelectric station

JIA Hui-yan1, GAO Hong-jiang2, PEN Xiao-an3

1.College of Resources and Environment Engineering, Liaoning Technical University, Fuxin （123000）

2.College of Civil Architecture Engineering, Liaoning Technical University, Fuxin （123000）

3.Water Conservancy Bureau In Jiashan county,Zhejiang province,（314100）

Abstract

Based on domestic much sames’ projects experience and Engineering geologic conditions of underground powerhouse, excavating layering measure and presplit blasting of powerhouse upper part was established, and the optimum methods of rock excavation, the most available layout of bore hole, the most effective formation of explosive charge and other relative blasting parameter were ultimately determined by repeatedly analog excavation test. This paper studied the mechanical properties and working properties of steel fiber concrete, determined the mixture of steel fiber reinforced concrete related to requirement of support and construction by field and laboratory test. The critical construction technology of wet steel fibers shotcrete is briefly presented

Key words：excavation scheme，layout of bore hole，mixture of steel fiber reinforced concrete，the wet spraying concrete technology

作者简介：贾惠艳（1975.9-），女，辽宁北宁人，博士生，讲师，主要从事岩土工程和工程地质等领域的教学与科研工作。

6