菩萨岗隧道位于地震基本烈度区度区,采用时程分析法对隧道结构进行抗震受力分析,据以验算地层的稳定性,并根据分析结果进行隧道结构截面设计,本文对高烈度区域隧道衬砌设计具有参考借鉴作用。

Taking a double-track railways wide continuous rigid-frame structure of large span prestressed girder as research background,according to the construction way of mid-span closure firstly and side-span closure secondly,this paper analyses the bridge construction process using finite element software MIDAS/Civil,and analyses the stress characteristic of each construction phase.The calculation results show that section choice and prestressing tendon arrangement are reasonable,construction process is safe.