连拱隧道围岩压力的计算与单洞隧道不一样，在《公路隧道设计细则》（JTG ／T D70—2010）的基础上对连拱隧道深浅埋分界判断及围岩压力进行了研究。以象山隧道为具体工程实例，对围岩压力进行了计算，并采用 midas 数值计算软件对衬砌及中隔墙内力进行了计算，得出内力分布图，对连拱隧道设计有一定的指导意义。%The count about rock pressure in arch tunnel is different with a single-hole tunneling. On the basis of “highway tunnel design specification”(JTG /T D70—2010),the article study the bound-ary judgments of the buried and rock pressure in arch tunnel.With specific examples of Xiangshan tun-nel,it calculate the rock pressure,and use midas numerical software to calculate internal forces of lining and wall,and obtain the internal force distribution.It have a certain reference for the design in arche tun-nel.
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