某高速铁路跨塘路基防渗加固措施研究  

Study on Seepage Prevention and Reinforcement Measures of a Subgrade Crossing Weir Pond of a High Speed Railway

作　　者：殷潇 YIN Xiao(China Railway Erju 5th Engineering Co.,Ltd.,Chengdu 610091,China)

机构地区：[1]中铁二局第五工程有限公司,成都610091

出　　处：《路基工程》2020年第3期66-69,共4页Subgrade Engineering

摘　　要：某高速铁路D4K485+845~D4K486+045段路基跨越堰塘尾部,受到堰塘蓄水、放水影响,不能保证运营安全,经补充勘察,采取地下防渗处理、高压旋喷咬合桩止水帷幕,混凝土挡水堤坝,库尾段堤坝基础采用钻孔桩+桩基托梁;路堑边坡设支撑渗沟,路基侧沟下设置盲沟,路基基底采用CFG桩加固,设置碎石垫层夹双向土工格栅,再加设一层复合防排水板的综合处理措施,获得良好效果。The subgrade of a high-speed railway section D4K485+845~D4K486+045 crosses the tail of the weir pond,which is affected by the water storage and release of the weir pond,so the safety of high-speed railway operation cannot be guaranteed.Through supplementary investigation,underground anti-seepage treatment,high pressure rotary jet secant pile water-stop curtain are used.Concrete water retaining dam,dam foundation at the tail of the reservoir uses bored pile+pile foundation joist;the cutting slope is provided with support seepage ditch,and the subgrade side ditch is provided with blind ditch.The foundation of the subgrade is reinforced by CFG pile,the gravel cushion sandwiched with bidirectional geogrid was set,and a layer of composite waterproof and drainage plate is added to achieve good results.

关 键 词：高速铁路 跨塘路基 处理措施 桩基托梁挡水墙 防渗帷幕 地基加固 

分 类 号：U216.414[交通运输工程—道路与铁道工程]