上软下硬地层铁路隧道下穿既有高速公路施工方法研究  

Study on the construction method of railway tunnel crossing under expressway and built in upper soft and lower hard stratum

作　　者：刘松涛 张国安[2] 杨秀竹[3] 石钰锋[3] 雷金山[3] 

机构地区：[1]中交第四公路工程有限公司,北京100025 [2]南宁铁路局湘桂铁路指挥部,广西柳州500016 [3]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2011年第5期35-39,共5页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51108462);湖南省工业支撑科技计划项目(2011GK3217);南宁铁路局湘桂铁路科技创新计划项目

摘　　要：石头岗隧道下穿衡昆高速公路,洞身上部为膨胀土,下部为灰岩,呈上软下硬特点,不仅施工风险大,且施工困难。为此采用数值分析手段对上软下硬地层隧道下穿高速公路施工方法进行研究。研究结果表明:上软下硬地层隧道采用上部中隔墙法施工,在降低施工风险、保证施工安全的同时,能加快施工进度,可供类似工程借鉴。The Shitougang Tunnel crosses under the highway from Hengyang to Kunming.The tunnel was excavated mainly in upper expansive soil and lower limestone.The construction was very hard and adventurous because of the upper soft and lower hard stratum and the highway lyingabove.In this paper,Construction method for railway tunnel crossing under expressway in upper soft and lower hard stratum was studied by numerical analysis method.It is indicated that partition method in the upper soil can not only reduce construction risk,but also accelerate the construction progress

关 键 词：上软下硬 下穿高速公路 数值分析 施工方法 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]