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某高速公路的过水隧洞围岩稳定性差,且围岩内部富含地下水。该文对过水隧洞衬砌进行了设计,针对过水隧洞施工期和运营期结构受力特点,采用荷载结构法对衬砌进行了计算,分别探讨了隧洞内部无过水压力和内部有过水压力两种情况下隧洞衬砌的稳定性。研究表明:无论是施工期还是运营期,隧洞衬砌均是稳定的,且运营期隧洞衬砌位移及应力要比施工期小。
The surrounding rock of a highway tunnel is poor in stability, and the groundwater is rich in groundwater. In this paper, the design of overpass tunnel lining is designed. According to the stress characteristics of the over-water tunnel during the construction period and operation period, the lining structure is calculated by load-bearing structure method. The over-water pressure inside the tunnel and over-water pressure Tunnel lining stability in both cases. The research shows that the lining of the tunnel is stable during the construction period and the operation period, and the displacements and stresses of the tunnel lining during the operation period are smaller than those during the construction period.