摘要
本文依托北京地铁14号线十里河站与10号线十里河站3条暗挖换乘通道下穿十里河桥引桥工程,研究了地铁连拱换乘通道下穿引桥施工沉降控制问题.采用MIDAS-GTS NX建立连拱换乘通道的三维实体模型,分析通道开挖施工在原始土层、全断面深孔注浆加固和全断面深孔注浆加固+超前小导管3种加固工况下的地表沉降、拱顶沉降及对引桥的影响.根据地表沉降随换乘通道开挖步序的变化规律,提出4种沉降控制措施.结果表明全断面深孔注浆加固+超前小导管支护的土体加固措施能有效减少地表沉降和降低对引桥的影响.
In this paper,the settlement control problem of the underpass bridge in the subway doublearch transfer channel is studied,based on three underground excavation passages of Shilihe Station of Beijing Metro Line 14 and Shilihe Station of Line 10 under the Shilihe Bridge approach project.A three-dimensional solid model of the arch-transfer channel is established with MIDAS-GTS NX.The effects of tunnel excavation construction on surface settlement,dome settlement and the approach to the approach bridge are analyzed under the three conditions of original soil layer,full-section grouting reinforcement and full-section grouting reinforcement with advanced small conduit.According to the change law of surface settlement with the excavation step of transfer channel,four kinds of settlement control measures are proposed.The results show that the reinforcement measures of soil grouting reinforcement with advanced small conduit can effectively reduce the impact on surface settlement and approach.
作者
李勇森
衡明欣
文亮亮
梁斌
李川
LI Yongsen;HENG Mingxin;WEN Liangliang;LIANG Bin;LI Chuan(The Fifth Subsidiary of China Railway 15th Construction Bureau Group Corporation,300133,Tianjin,China;Civil Engineering School,Henan University of Science and Technology,471023,Luoyang,China)
出处
《北方工业大学学报》
2019年第5期43-50,共8页
Journal of North China University of Technology
基金
国家自然科学基金项目“不规则颗粒离散相动力学及气粒分离机制研究”(U1604135)
中铁十五局集团有限公司重点科研项目(2010B15)
关键词
地铁
连拱通道
下穿引桥施工
数值模拟
沉降控制
subway
arch channel
construction of underpass bridge
numerical simulation
settlement control
作者简介
第一作者:李勇森,工程师.研究方向:工程施工管理.
