引水隧道下穿铁路线路基沉降的数值分析  

Numerical analysis on the subgrade settlements caused by tunneling across railway

作　　者：郑明新[1] 陈养强 郑少弘 蒲保新[3] 欧阳林[1] 

机构地区：[1]华东交通大学岩土与道桥工程研究所,江西南昌330013 [2]南昌铁路局福建地方铁路有限责任公司,福建福州350013 [3]南昌铁路局,江西南昌360000

出　　处：《湖南科技大学学报（自然科学版）》2014年第2期36-41,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(51068006);江西省研究生创新基金资助项目(YC2013-S169)

摘　　要：以福建省九龙江北引引水隧道下穿铁路线为研究对象,采用软件FLAC3D分析双洞引水隧道的下穿开挖对鹰厦铁路双线、厦深高铁双线的铁路路基的影响,通过模拟路基未加固和加固2种工况下,隧道单线贯通及双洞贯通后的路基的沉降情况.计算结果表明:最大沉降位于两隧道中心线正上方,路基未加固:右洞开挖对路基沉降的贡献64%左右,左洞贡献36%左右;路基加固:线开挖对路基沉降的贡献66%左右,左洞贡献34%左右.对比实测数据较为一致,证明拟合较好.Based on the draw water tunnel of the Jiulong river across railway in Fujian Province as the research object,the finite element analysis software FLAC3D was used to analysis the double draw water tunnel excavation influence of the subgrade,to the double railway of Yingtan -Xiamen and the double railway of Xiamen -Shenzhen. Through simulation the two condition of subgrade unreinforcement and subgrade reinforcement,the situation of settlement of subgrade was analysed when in single tunnel perforation and double tunnel perforation.Research shows that：the position of maximum settlement is just above the the tunnel centerline,the proportion of subgrade settlement caused by the right line excavation is 64% and caused by the left is 36% when subgrade unreinforcement,the proportion of subgrade settlement caused by the right line excavation is 66% and caused by the left is 34% when subgrade reinforcement.The results fit well with monitoring data.

关 键 词：引水隧道 铁路线路 数值模拟 路基沉降 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]