列车荷载对隧道下穿路基沉降的影响  

Effect of Train Load on Subgrade Settlements Acrossed by Tunnel

作　　者：陈养强 郑明新[1] 张永伟[1] 刘林[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]中土集团福州勘察设计研究院有限公司,福建福州350013

出　　处：《河南科技大学学报（自然科学版）》2014年第4期59-63,8,共5页Journal of Henan University of Science And Technology:Natural Science

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

摘　　要：以福建省九龙江北引水隧洞穿越鹰厦铁路、厦深高铁线路为研究对象,在路基加固前提下,采用换算土柱法转化的静荷载和类正弦形式列车荷载形式,采用软件FLAC3D分析了隧道单线贯通及双线贯通后的铁路路基变形情况。研究结果表明:类正弦形式列车荷载引起的路基沉降比换算土柱法转化的静荷载引起的路基沉降大0.4 mm,约5%;两种荷载引起的路基沉降槽形态均为"双峰"形态,峰值均出现在两隧道各自的中心线上;通过对比实测数据和两种工况的计算数据,得出静荷载计算结果与实测结果吻合较好。Taking the draw water tunnel across the Yingtan-Xiamen and Xiamen-Shenzhen railway in Fujian province as the research object,the finite element analysis software FLAC3 Dwas used to analyse the double draw water tunnel excavation influence on the reinforced subgrade by using the way of the static load conversed from soil column method,and the sine train load. The results show that the settlement caused by sine train load is 0. 4 mm larger than the static load,about 5%. The subsider shape caused by two kinds of load are the‘twin peaks' form,and the two peaks appear at the respective centers of the tunnel line. By comparing the measured data and calculated data of two conditions,the calculated data of static load fit well with the monitoring data.

关 键 词：引水隧道 静荷载 类正弦荷载 路基沉降 

分 类 号：U216.421[交通运输工程—道路与铁道工程]