高温期滑模快速施工条件下的重力坝表孔长闸墩温控防裂  

Temperature Control and Crack Prevention for Long Piers of Gravity Dam under High Temperature Conditions and Rapid Construction by Slip-form

作　　者：练松涛 吴超[2] 强晟[2] 朱振泱[3] 郭万福 

机构地区：[1]中国水利水电第四工程局有限公司,青海西宁810007 [2]河海大学水利水电学院,江苏南京210098 [3]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《水电能源科学》2013年第12期62-65,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51109071;51209078);江苏高校优势学科建设工程资助项目

摘　　要：针对滑模快速施工条件下混凝土闸墩温控防裂问题,以官地水电站表孔闸墩为例,采用仿真计算方法预测并优化了该闸墩施工期温度和应力发展过程。结果表明,在混凝土所处环境温度较高、混凝土结构体积较大、约束大时,二级配混凝土、门槽、溢流面顶部附近的闸墩混凝土、间歇面四个区域易开裂,需加强水管冷却和表面保温措施。According to the temperature control and crack prevention problems under rapid construction by slip-form, taking the surface outlet piers on Guandi hydropower station for an example, simulation calculation method has been used to optimize the development process of temperature and stress during the construction period. The results show that it is easy to crack in the four regions： two grade aggregate concrete, gate slot, concrete of piers near the overflow surface and intermittence surface when the concrete has higher ambient temperature, large volume and strong constraints. Therefore, pipe cooling and thermal insulation measures should be taken.

关 键 词：表孔闸墩 高温期 滑模 快速施工 温控防裂 

分 类 号：TV642.2[水利工程—水利水电工程]