哈大铁路客运专线季节性冻土区段接触网柱基础设计  

Foundation Design for Overhead Contact System Posts in Seasonally Frozen Ground Section of Harbin-Dalian Passenger-dedicated Line

作　　者：王玉环[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司电气化处,西安710043

出　　处：《铁道标准设计》2012年第10期84-87,共4页Railway Standard Design

摘　　要：主要阐述特殊地质即季节性冻土条件下接触网支柱基础的设计理念。针对东北地区季节性冻土这一特殊土壤特性,提出采用机械扩底桩基来抵抗季节性冻土冻胀上拔,其优点是有效地提高抗冻拔力及减少钻孔深度,尽可能减少支柱基础与路基内桩板结构干扰。机械钻孔扩底桩基是季节性冻土代表区域内高速铁路建设中接触网支柱基础设计可选的优化方案,也是支柱基础底部受到地基处理措施干扰及湿陷性黄土影响要求基础浅埋时的佳选。This paper mainly expounds the design ideas of overhead contact system post foundation under the condition of special geology that is seasonally frozen ground.Aiming at the special soil characteristic of seasonally frozen ground in northeast China,this paper puts forward that the mechanical pedestal pile foundation,which can be used for resisting the frost heave and up-pull force of the seasonally frozen ground,has the advantages of enhancing the frost heave resistance and reducing the borehole depth as well as reducing the interference between the OCS post foundation and the pile-sheet structure within the railway subgrade.So mechanical pedestal pile foundation not only is the optimum scheme on OCS post foundation design of high-speed railway in the representative seasonally-frozen ground section,but also is the good choice in case the OCS post foundation bottom is disturbed by ground treatment or affected by collapsibility loess which often has the requirement of shallow burying.

关 键 词：哈大客运专线 接触网支柱 季节性冻土 上拔力 冻胀 

分 类 号：U213.157[交通运输工程—道路与铁道工程] U226.8