水利水电技术2017，Vol.48Issue(1)：63-66,4.DOI:10.13928/j.cnki.wrahe.2017.01.012
高碾压混凝土坝裂缝成因及防治措施研究
Study on crack causation of high roller-compacted concrete dam and its prevention measures
摘要
Abstract
On roller-compacted concrete (RCC) dam,cracks exist to some extent,which can lower the safety degree of the concrete dam.By taking a RCC dam as a case,the crack causation of the dam is systematically analyzed herein according to the measured cracking data,and then the relevant prevention measures are proposed as well.The study shows that long inter-layer pause and cold shock from water flow during flood season during the construction are the main causes of the occurrences of cracks on the dam.Therefore,the long pause must be avoided during the construction,and if it is unavoidable,the temperature control measures,e.g.enhancing insulation,thickening control layer,etc.,must be strengthened for the inter-layer of long pause.For the cracks caused by the cold shock from flow notch,the concrete on a certain altitude under the flow surface can be cooled to a target temperature value in advance through surface flow or medium-term cooling,so as to decrease the excessive temperature difference caused by cold shock.关键词
碾压混凝土/温度裂缝/有限元仿真/温度应力/表现保温/大体积混凝土/应力集中/水利工程安全监测Key words
roller-compacted concrete/temperature crack/finite element simulation/temperature stresses/superficial thermal insulation/mass concrete/stress concentration/safety monitoring of water conservancy projects分类
水利科学引用本文复制引用
李松辉,王智阳,杨莉英,邓香铭,李玥..高碾压混凝土坝裂缝成因及防治措施研究[J].水利水电技术,2017,48(1):63-66,4.基金项目
国家自然科学基金项目(51579252) （51579252）
国家重点基础研究发展规划项目(2013CB036406,2013CB035904) （2013CB036406,2013CB035904）
流域水循环模拟与调控国家重点实验室基金 （）
中国水利水电科学研究院科研专项项目(1513) （1513）
