关于周边缝止水结构设计的探讨  

Design of Peripheral Water Seal Joint

作　　者：宋永杰 

机构地区：[1]青海省水利水电勘测设计研究院,西宁市810012

出　　处：《水利水电技术》1999年第3期20-21,共2页Water Resources and Hydropower Engineering

摘　　要：周边缝是面板坝十分关键的部位，受坝体变形及水压力的作用，将产生张开、沉降和错动三向位移．对高坝，因水头高，位移植更大，其止水的性能将直接影响坝体的运行．国内外已建工程大多采用表面塑性止水、中部PVC、底部铜片三道止水，近年来又在顶部铺填粉煤灰或粉细砂，以期在底部反滤的作用下，缝自动淤堵，起到辅助防渗的作用．但常这不到预期的效果，亦很难适应大变位的条件，对其逐步加以改进将是十分必要的．本文以几个工程实例及试验研究成果为例，对止水结构的型式进行了讨论．Peripheral joint is a crucial place of the concrete face rock fill dam, with the effect of water pressure and dam deformation, the peripheral joint can produce there-dimensional displacement. As far as the high dam is concerned, because of high water pressure, the peripheral joint can produce large displacement. Thus,the function of periperal joint will directily influence the operation of dam. Most of the face dams, which have been constructed at home and abroad, adopted three layers of watertight seal, including surface plastic watertight seal, interior PVC and bottom copper seal. But it is proved by practices and experiments that the function of the watertight seal usually were not up to the effect expected, and were not adaptable to the condiction of large deformation. So it is very necessary to improve the watertight seal progressively. The arpaper discusses the watertight seal structural puttern on some project examples and result of experimental research and put forward some views for reference

关 键 词：面板坝 周边缝 表层止水 止水结构 

分 类 号：TV641.434[水利工程—水利水电工程]