摘要
针对在心墙-防渗墙坝型中封闭式防渗墙顶部出现的应力集中的工程问题,从防渗墙与两侧覆盖层的差异沉降角度出发,依据防渗墙的存在并不会引起坝坡隆起的位移协调关系,利用分层总和法和弗拉曼解答推导出一个简便计算防渗墙顶部应力增量的公式。通过分析,防渗墙顶部的应力集中程度主要取决于心墙材料的刚度和防渗墙与两侧覆盖层的差异沉降。在工程设计中,利用该公式可方便计算,有利于对心墙材料与防渗墙材料进行初步选择。
In order to solve the problem of stress concentration at the top of closed cutoff wall in core wall-cutoff wall dam, from the point of view of differential settlement between cutoff wall and deep overburden and based on the fact of the existence of cutoff wall being not cause the displacement coordination of dam slopes, a simple formula for calculating the stress increment at the top of cutoff wall is derived by using layer-wise summation method and Flamant answer. The analysis shows that the stress concentration degree at the top of cutoff wall is mainly determined by the stiffness of core wall material and the differential settlement between cutoff wall and deep overburden. In engineering design, the formula is convenient to calculate the stress concentration and conducive to the initial selection of core wall material and cutoff wall material.
出处
《水力发电》
北大核心
2017年第10期53-55,共3页
Water Power
基金
长春工程学院青年基金资助项目(32015005)
关键词
应力增量
心墙
防渗墙
差异沉降
深厚覆盖层
土石坝
stress increment
core wall
cutoff wall
differential settlement
deep overburden
embankment dam
