洪家渡水电站工程高边坡综述

乌江洪家渡水电站坝址河谷深切300余m,硬质岩与软质岩相间分布,岸坡地形陡峻,软弱夹层发育,卸荷、崩塌等物理地质作用强烈。根据坝址地质条件与电站枢纽布置,工程存在:隧洞群进水口同向高边坡整体稳定问题;坝肩开挖、隧洞进出口开挖、厂房开挖及料场开挖等高边坡稳定问题;泄洪冲刷及雾化区1号、2号塌滑体高边坡稳定问题;王家渡堆料场、瓦房寨砂石系统高边坡稳定问题。因此,工程高边坡稳定问题是本工程的主要工程问题之一,但通过参建各方共同努力,本工程高边坡处理都取得了圆满成功。

Summary of Engineering High Sides of Hongjiadu Hydropower Station

The geological conditions of Hongjiadu Hydropower Station on the Wujiang River are that the depth of valley is up to more than 300 m,hard rock strata alternate with soft ones,slops of bank are high and precipitous,soft strata have developed,geological activities are very strong such as stress-releasing,collapsing and etc..Therefore,there existed some engineering problems for example a series of the stability of high sides in excavations of some hydraulic structures.How to keep the stability of high side was a key problem in this project.This article made a summary about successful experience of treating high sides in the project.