铁路路基穿越东非大裂谷地裂缝数值模拟研究  

Numerical Simulation Study of Ground Fissure in Railway Subgrade Crossing the Great Rift Valley

作　　者：徐俊东 高红岩 严敏 温欣岚 陈平 XU Jundong;GAO Hongyan;YAN Min;WEN Xinlan;CHEN Ping(China Road&Bridge Corporation,Beijing 100010,China;CCCC Railway Consultants Group Co.,Ltd.,Beijing 100089,China)

机构地区：[1]中国路桥工程有限责任公司,北京100010 [2]中交铁道设计研究总院有限公司,北京100089

出　　处：《路基工程》2020年第5期183-187,共5页Subgrade Engineering

基　　金：中国交建重大基础研究发展项目(2017-ZJKJ-08)。

摘　　要：肯尼亚中部的内马标轨铁路,穿越东非大裂谷,不良地质发育,地质条件复杂。针对内马铁路出现的地裂缝,运用有限元Midas/GTS分析该铁路路基穿越地裂缝的受力及变形特征,同时对比分析了土工格室、挖除换填A,B组土、碎石垫层、混凝土板等工程措施对路基的位移变形影响,从而准确有效地确定了工程措施。Located in central Kenya,the Nairobi—Malaba standard railway crossing the Great Rift Valley is characterized by complex geological conditions and poor geological development.In view of the ground fissures in Nairobi—Malaba railway,this paper analyzes the stress and deformation characteristics of the railway subgrade through the finite element Midas/GTS,and analyzes the influence of the geocell,excavation and replacement of A,B group soil,gravel cushion,concrete slab and other engineering measures on the displacement deformation of the subgrade so as to determine the engineering measures accurately and effectively.

关 键 词：铁路路基 地裂缝 土工格室 碎石垫层 换填 有限元模拟 

分 类 号：U416.12[交通运输工程—道路与铁道工程]