溜砂坡防治措施之棚硐和挡砂墙工程研究  

Research on Shed Tunnel and Retaining Wall Engineering in Prevetion Measures of Sand-sliding Slope

作　　者：卜祥航[1] 傅荣华[1] 李川[1] 何娜[1] 汪留洋[1] 

机构地区：[1]成都理工大学环境与土木工程学院,地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《水利与建筑工程学报》2013年第2期82-85,共4页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目资助(41072228)

摘　　要：通过室外物理模拟实验,针对溜砂坡防治工程,模拟棚硐和挡砂墙防治措施,初步探讨了棚硐顶面坡度与坡体排砂效果关系,挡砂墙墙背土压力分布状况。实验结果表明:棚硐板的设置角度应比野外溜砂坡的天然休止角大约1°,能达到最佳的排砂效果;溜砂坡的不均匀系数越大,墙背土压力越大,降雨过后挡砂墙后主动土压力降低,散粒体粘聚力增加。According to the prevention measures of sliding sand slope and through the simulative experiments of shed tun- nel engineering and retaining wall engineering, the preliminary study is made on the relationship between the gradient of cut-and-cover tunnel and the effect of sand discharge, and the distribution of the granule pressure of retaining wall back is also studied. The researches show that the shed tunnel plate＇s setting angle should be bigger than the field slip-sand slope＇ s natural repose angle about 1~, so as to be able to get the best effect of sand discharge. The larger the nonuniform coefficient of slip-sand slope, the greater is the wall back pressure. After the rain, the wall＇s active earth pressure re- duces, and the bulk solid＇s cohesive force increases.

关 键 词：溜砂坡 棚硐 挡砂墙 天然休止角 排砂效果 土压力分布 粘聚力 防治措施 

分 类 号：U417.1[交通运输工程—道路与铁道工程]