某水电站施工期河床坝段建基面优化及校核  

Optimization and Check for the Foundation Surface on Riverbed Dam Section of a Hydropower Station during Construction Period

作　　者：邹浩[1] 晏鄂川[1] 高旭[1] 

机构地区：[1]中国地质大学工程学院,湖北武汉430074

出　　处：《水力发电》2016年第1期45-48,共4页Water Power

摘　　要：依托施工期的某水电站,采取现场地质调查结合声波测试、变形试验及大剪试验等技术手段,在准确分析建基岩体工程地质条件的基础上,对建基岩体进行评价,据此对勘察阶段选定的建基面(河床坝段)进行高程的优化,并利用二维数值分析软件Phase,对优选的建基面进行变形稳定性校核。分析结果表明,天然及地震工况下,强度折减系数均大于3,优选的建基面满足混凝土重力坝变形稳定性要求。By field geological survey combining with sound wave test, deformation test and large shear test to accurately analyze the engineering geological conditions of rock mass, the rock mass under foundation surface in a hydropower station during construction period is evaluated, and then the elevation of foundation surface （riverbed dam section） determined in investigation stage is optimized. The deformation stability of optimized foundation surface is checked by 2D numerical analysis software Phase. The results show that the strength reduction factors are bigger than 3 under natural and earthquake conditions and the optimized foundation surface meets the requirement of concrete gravity dam deformation stability.

关 键 词：施工期 河床坝段 建基面 优化 校核 

分 类 号：TU459[建筑科学—岩土工程]