云南鲁甸月亮湾水库大坝地质缺陷处理分析  

Geological defect treatment and analysis of Yueliangwan Reservoir Dam in Ludian County,Yunnan Province

作　　者：林姗[1,2] 龙华 陈雪丽 程圣国[2] 赖坡 

机构地区：[1]云南省昭通水利水电勘测设计研究院,云南昭通657000 [2]三峡大学土木与建筑学院,湖北宜昌443002 [3]云南省鲁甸县水务局,云南鲁甸657100

出　　处：《人民长江》2015年第23期34-37,共4页Yangtze River

基　　金：国家重点基础研究发展计划973项目(2011CB013505)

摘　　要：大坝建基面的地质状况对水工建筑物的安全性及耐久性至关重要。月亮湾水库大坝开挖建基面揭示存在断层、裂隙及破碎带、粉细砂层等地质缺陷,有效解决坝基的变形速率不均匀和渗漏问题是坝基改良的关键。针对坝基的主要工程地质问题,采取清基、灌浆和置换处理等措施,使坝基岩体质量得到了显著改善。施工期变形监测成果显示,坝体沉降量由中部向两坝肩递减,相邻坝段差异沉降较小,大坝沉降趋于平缓。Dam foundation engineering geological conditions are very important to the safety and durability of hydraulic structures. Fault,fissure and fracture zones,and silty sand layer were exposed in excavation of dam foundation of Yueliangwan Dam.The inhomogeneous deformation rate and seepage problems are the key to dam foundation treatment. According to the main engineering geological problems,measures like foundation cleaning,consolidation grouting and replacement treatment and so on were taken,which significantly improved the foundation rock mass quality. Deformation monitoring during construction period showed that the settlement decreases from the center of the dam to two abutments,the settlement differences of adjacent dam sections are relatively small,and the settlement of the dam tends to be stable.

关 键 词：地质缺陷 基础处理 监测分析 混凝土面板堆石坝 

分 类 号：P642[天文地球—工程地质学]