土坝回填粘土渗透变形特性试验研究  

A Test Study on Seepage Properties of Earth-Rock Dam Core Clay

作　　者：杜宁[1] 陈兰云[1] 李宪辉[2] 易南概[1] 

机构地区：[1]金华职业技术学院,浙江金华321007 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《金华职业技术学院学报》2007年第4期14-18,89,共6页Journal of Jinhua Polytechnic

基　　金：金华市科技计划资助项目(2004-1-331)

摘　　要：土石坝的除险加固方案中常采用冲抓套井回填夯实粘土作为防渗体,即粘土心墙防渗体,该方法已在许多水库和相当长度的堤防工程建设中得到广泛的应用;然而其渗透稳定一直是工程设计和施工中的关键问题之一。本文结合某水库土石坝除险加固工程坝体渗透稳定问题,开展了坝体心墙粘土的物理特性、渗透特性、临界坡降的研究,为工程设计和施工提供了必要的分析成果和参考依据。The measures to reinforce the earth-rock dams often take clayey soil backfilled and compacted in sleeve well which is dug by hammer grab as seepage prevention body,which is called clay-core seepage prevention body.The method has been widely applied in the construction of lots of reservoirs and the corresponding length embankment;however,its permeated stability is one of the key problems in this engineering design.In this paper,contra posing the seepage stability problem of the dam body which was the reinforcement project of the sickness danger earth-rock dams on some reservoir.We conduct the research that include the physical characteristics of clay core of dam body,seepage characteristics,and critical hydraulic gradient etc,which offers necessary analysis result and reference data for engineering design and construction.

关 键 词：土石坝 粘土 渗透破坏 临界水力梯度 

分 类 号：TU411.4[建筑科学—岩土工程]