哈大铁路客运专线岩溶区桥梁柱桩基础顶板安全厚度分析  

Analysis of Safety Thickness of Column Pile Foundation Roof of Bridge in Karst Area on Harbin-Dalian Passenger Dedicated Line

作　　者：龚宝中[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《高速铁路技术》2012年第6期36-39,共4页High Speed Railway Technology

摘　　要：文章结合哈大铁路客运专线工程岩溶地区的桥梁柱桩基础设计,利用有限元分析软件Midas,计算了岩溶区柱桩基础下岩石应力分布情况,分析了不同桩径下溶洞顶板的最大剪应力及最大主拉应力,确定了岩溶区桥梁柱桩基础下溶洞顶板的安全厚度设计原则,解决了岩溶地区桥梁多层溶洞柱桩基础设计难题。其内容可作为今后铁路客运专线岩溶区桥梁柱桩基础设计的参考。In this paper, combined with the bridge column pile foundation design in the karst area of Harbin-Dalian Pas- senger Dedicated Line and using finite element analysis program Midas, a calculation on the rock stress distribution un- der column pile foundation in the karst area is made, an analysis is made on the maximum shear stress and the maximum main tensile stress of cave roof under the condition of different pile diameter, the safety thickness design principle of karst cave roof under column pile foundation of the bridge in the karst area, and the design problem of column pile foun- dation in multilayer karst caves is resolved. The paper can be used for column pile foundation design of bridge on pas- senger dedicated line project in karst area for reference in the future.

关 键 词：岩溶地区 铁路桥梁 柱桩基础 顶板安全厚度 哈大铁路客运专线 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]