铁路隧道下穿既有专线地表沉降控制基准研究  

Study on Surface Settlement Control Criterion of Railway Tunnel Crossing under the Existing Railway Line

作　　者：王道远[1,2] 袁金秀[2] 朱永全[3] 朱正国[3] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]河北交通职业技术学院土木工程系,石家庄050091 [3]石家庄铁道大学土木工程分院,石家庄050043

出　　处：《地下空间与工程学报》2013年第S2期1945-1950,共6页Chinese Journal of Underground Space and Engineering

基　　金：河北省自然基金(E2012210011);河北省高等学校自然科学青年基金项目(Q2012107);河北省高等学校科学技术研究重点项目(zd20131065)

摘　　要：目前,纵多地表沉降的预测公式和控制基准均建立在分离式单、双线隧道之上,而对于城市下穿既有客运专线的铁路连拱隧道施工引起的地表沉降预测公式和控制基准几乎没有。以国内第一条下穿既有石太客运专线浅埋大跨双连拱城市铁路隧道为工程背景,综合考虑列车荷载、埋深、土体弹性模量、泊松比、内聚力、内摩擦角等因素,采用混合正交模型法设计36种工况,利用midas-gts有限元软件对双连拱隧道下穿既有客运专线进行模拟,获得地表沉降规律,用IstOpt软件对沉降进行回归分析,建立地表最大沉降量预测公式,并基于既有线轨道变位提出地表沉降控制基准。通过部分工程实例验证合理性,其结论可供类似工程借鉴和参考。At present,the study on surface settlement prediction and control norm has been mostly concentrated on single and dual-line tunnels,while there is hardly any research findings of surface settlement from city railway double-arch tunnel crossing below the existing passenger railway line. Based on the first railway double-arch shallow and large-span tunnel with multiple lines undercrossing Shitai passenger railway line in China,numerical simulations are carried out to 36 different conditions designed on the basis of hybrid orthogonal model method by midas-gts software,considering train load,buried depth,modulus of elasticity,Poisson ratio,cohesion and internal friction angle etc. The law of surface settlement is obtained and the settlement prediction formula is built by regression analysis with IstOpt software. At the same time,the control norm of settlement is provided based on the existing track displacement.The rationality of settlement prediction formula and control norm is verified through some project examples,the conclusion can serve as a good reference to similar works.

关 键 词：城市 双连铁路拱隧道 客运专线 沉降预测 控制基准 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]