Analysis of tunnel in different permeate water pressure shows that the concretive rock surrounded the reinforced concrete liner has a great contribution the permeate water pressure . thus , the surrounding rock , together with the concrete liner , should be considered in safety evaluation of the tunnel 通过对外水压力变化情况下的不同分析，表明钢筋混凝土衬砌和固结围岩的联合作用明显，安全评估时应考虑衬砌和围岩的联合受力作用。
