大跨度浅埋隧道围岩压力的研究  

Research on Surrounding Rock Pressure of Large-span Shallow Buried Tunnel

作　　者：董志明 

机构地区：[1]华杰工程咨询有限公司,北京市100029

出　　处：《公路》2014年第8期273-277,共5页Highway

摘　　要：通过对大跨度浅埋隧道围岩压力的研究,结合工程实践以及数值计算,分析了《铁路隧道设计规范》浅埋隧道围岩压力计算公式以及大跨度浅埋隧道分界埋深划分的局限性。计算表明大跨度隧道在埋深较大(埋深大于hq时)的浅埋段,因围岩压力荷载计算的局限性,大跨度浅埋隧道的结构受力分析不宜采用荷载结构法,而应采用地层结构法;同时结合本研究,对大跨度浅埋隧道的设计要点、施工工法、监控量测措施等提出了一些建议。Through study of the surrounding rock pressure of the large-span shallow tunnel, and combining with engineering practice and numerical calculation, the limitation of the calculation formula in Code for Design of Railway Tunnel about surrounding rock pressure of large-span shallow tunnel and the depth boundary division of large-span shallow tunnel are analyzed. Calculation shows that large-span tunnel in deep section （when depth more than hq）, because of the limitation of the calculation formula about the surrounding rock pressure, Load-structure Method should not be used for the stress analysis of large-span shallow tunnel, and Stratum-structure Method should be adopted. At the same time, according to this research, suggestions about the design points, large span shallow tunnel construction method, monitoring and measurement are proposed.

关 键 词：大跨度隧道 浅埋隧道 围岩压力 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]