高拱坝有盖重固结灌浆对基础区混凝土温度应力的影响  

Impact from cover-weight consolidation grouting on temperature stress of foundation concrete of high arch dam

作　　者：李松辉[1] 张国新[1] 唐忠敏[2] 刘毅[1] 

机构地区：[1]中国水利水电科学研究院结构与材料研究所,北京100038 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《水利水电技术》2011年第1期62-65,共4页Water Resources and Hydropower Engineering

基　　金：国家科技支撑计划项目(2008BAB29B05);水利部行业公益科研专项(200801007);国家自然科学重点基金(50909105)

摘　　要：高混凝土拱坝坝基的有盖重固结灌浆是提高岩体强度的有效方法，然而也将造成混凝土浇筑作业的暂时中断，从而造成固结灌浆层面的长间歇，这与拱坝混凝土浇筑所要求的薄层、短间歇（5～10d）、均匀上升产生矛盾，本文依此为研究重点，从温控角度，以某高拱坝为研究对象，分析探讨了由于固结灌浆造成的长间歇而对混凝土的影响。计算结果表明，长间歇的存在增加了混凝土开裂的风险。The cover-weight consolidation grouting for the foundation of arch dam is an effective method to improve the rock mass strength, which, however, will interrupt the concrete placement temporarily, and then makes longer intervals among the layers. This obviously contradicts with the requirement of thin layer, short interval （5 - 10 d） and uniform raising for the concrete placement of arch dam. By taking a high arch dam as the study case, the impact from the longer interval on the concrete caused by the consolidation grouting, as the key study point, is analyzed and discussed herein from the viewpoint of the temperature control. The relevant calculation shows that the cracking risk will be increased by the longer interval concerned.

关 键 词：高拱坝 基础 有盖重固结灌浆 温度应力 

分 类 号：TV642.4[水利工程—水利水电工程]