交通荷载下双线地铁隧道间距对上部公路隧道的影响  

Influence of the distance between two subway lines on the stress and deformation of the upper highway tunnel

作　　者：孔跃跃 郭望龙 梁新欢 童立红 台振东 丁海滨 无 KONG Yueyue;GUO Wangong;LIANG Xinhuan;TONG Lihong;TAI Zhendong;DING Haibin;无(China Railway 14th Bureau Group 4th Engineering Co.,Ltd.,Jinan 250101,China;School of Civil Engineering and Architecture&Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering,East China Jiaotong University,Nanchang 330013,China;School of Civil Engineering and Architecture&Engineering Research and Development Centre for Underground Technology of Jiangxi Province,East China Jiaotong University,Nanchang 330013,China;Nanchang Rail Transit Group Co.,Ltd.,Nanchang 330013,China)

机构地区：[1]中铁十四局集团第四工程有限公司,济南250101 [2]华东交通大学土木建筑学院&江西省岩土工程基础设施安全与控制重点实验室,南昌330013 [3]华东交通大学土木建筑学院&江西省地下空间技术开发工程研究中心,南昌330013 [4]南昌轨道交通集团有限公司,南昌330038

出　　处：《中南民族大学学报（自然科学版）》2023年第5期577-584,共8页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家杰出青年科学基金资助项目(51725802);国家自然科学基金-高铁联合基金资助项目(U1934208);江西省自然科学基金重点资助项目(20192ACB20001);南昌轨道交通集团科研资助项目(2019HGKYB002)。

摘　　要：以南昌艾溪湖隧道为研究对象,利用PLAXIS 2D有限元软件设计了几何相似比为1∶30的室内缩尺模型,研究了交通荷载下双线地铁隧道间距对上部公路隧道受力变形的影响.通过改变双线地铁隧道间距,对上层公路隧道模型底部板单元的变形、剪力、弯矩进行了详细地分析.结果表明:在改变双线地铁隧道的间距时,存在一个最佳间距使得上部公路隧道的变形、平均剪力以及最大正负弯矩的差值最小;并且从零间距到有间距过渡时,公路隧道底板的变形和受力情况会发生突变.Using the Nanchang Aixi Lake Tunnel as the object of research,an indoor scaled-down model with a geometric similarity ratio of 1∶30 generated from PLAXIS 2D finite element software was used to investigate the effect of the spacing of the two-lane subway tunnel on the force deformation of the upper road tunnel under traffic load.By changing the spacing of the two-lane subway tunnel,the deformation,shear force and bending moment of the bottom slab unit of the upper road tunnel model were analyzed in detail.The results showed that when the spacing of the two-lane subway tunnel was varied,there was an optimal spacing that could minimize the difference between the deformation,average shear force and maximum positive and negative bending moment of the upper tunnel.It was also found that the deformation and stresses in the tunnel floor could change abruptly during the transition from zero-spacing to nonzero-spacing.

关 键 词：公轨共建 隧道 变形 数值模拟 HSS模型 

分 类 号：U25[交通运输工程—道路与铁道工程]