三峡大学学报（自然科学版）2013，Vol.35Issue(4)：16-19,4.
重力坝常态混凝土垫层裂缝成因分析
Analysis on Crack Mechanism for Normal Concrete of Bedding Cushion in Gravity Dam
摘要
Abstract
Bedding cushion in concrete dam is often located on rock base,and its length to thickness ratio is large.So it is common to crack during construction period.Aim at the crack phenomenon happened to the single concrete blocks with 40.0m long and 2.0m thick of bedding cushion in gravity dam during construction period,the actual construction process is simulated based on the method of simulation calculation of temperature field and stress field considering water cooling pipes and surface heat preservation measures.The result shows that around the gallery of bedding cushion,due to some adverse factors such as the thinnest part of defects slot,thin pouring layer and long interval pouring,large bedrock constrains,stress concentration around the gallery,local surface flowing and so on,it is easy to crack.关键词
温度应力/混凝土垫层/裂缝成因/仿真计算Key words
temperature stress/ concrete cushion/ cracks mechanism/ simulation分类
建筑与水利引用本文复制引用
练松涛,郑伟忠,刘敏芝,郭万福,周兰庭..重力坝常态混凝土垫层裂缝成因分析[J].三峡大学学报（自然科学版）,2013,35(4):16-19,4.基金项目
国家自然科学基金资助(51109071,51209078) （51109071,51209078）
江苏高校优势学科建设工程资助项目 （）
