块体理论在拱坝坝肩边坡抗滑稳定性分析中的应用  

An Analysis of the Stability of Arch Dam Abutment Slope by the Block Theory

作　　者：商开卫[1] 秦宏浩[2] 窦灿[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]黄河水利委员会槐荫黄河河务局,济南250118

出　　处：《中国农村水利水电》2011年第4期110-114,共5页China Rural Water and Hydropower

基　　金："十一五"国家科技支撑计划专题(2008BAB29B01-2)

摘　　要：在水电站坝肩边坡的施工过程和运行过程中,由于岩体天然状态遭受到破坏,伴随着边坡开挖及大坝运行,相应的产生整体或部分块体移动,出现不稳甚至破坏效应,给施工和大坝的正常运行带来严重威胁。以万家口子水电站拱坝坝肩边坡为例,通过对坝肩边坡发育的结构面空间组合形式进行分析,找到可能存在的关键块体,采用三维极限平衡分析方法,计算各关键块体在施工期和运行期正常工况、降雨工况、地震工况下的稳定性安全系数,根据拱坝坝肩边坡的设计标准,评价各关键块体的稳定性,并针对坝肩存在的不稳定块体,给出了锚索加固的建议方案。During the construction process and the operation process of the dam abutment for the hydropower station,the natural stress state of the rock mass is destroyed,with the slope excavation and the dam operation.The block will move wholly or partially,and it will do great harm to the construction process and the dam operation process.This paper takes the arch dam abutment slope of the Wanjiakouzi Hydropower Station as an example.By analyzing space combination of different structural planes,the key blocks can be found.With the 3-D limit equilibrium method,the safety factor of stability for each key block under different working conditions,including normal condition,rainfall condition,earthquake condition,can be calculated.Based on the design criteria of arch dam abutment,the stability of each key block can be evaluated.Based on the unstable blocks,the advisory scheme of anchor cables is provided.

关 键 词：万家口子水电站 块体理论 坝肩 关键块体 安全系数 

分 类 号：TV223[水利工程—水工结构工程]