透水理论在阿尔塔什水电站发电洞混凝土衬砌设计中的应用

Application of permeable theory to design of concrete lining for power tunnel of Altash Hydropower Station

通过建立透水衬砌理论数值计算模型,以体积力的形式将内水压力施加于整个模型,分析混凝土衬砌和围岩的变形情况,根据衬砌应力按照规范进行限裂配筋。利用这种方法可以较好地反映内水外渗后衬砌和围岩的实际受力应力应变情况。将这种计算方法应用于阿尔塔什水电站发电洞混凝土衬砌设计中,结果表明:发电洞混凝土衬砌配筋量要远小于面力配筋量,并从而得出了一些有意义的结论,可为这类隧洞设计提供借鉴思路。

Through establishing a theoritical numerical calculation model for permeable lining, the concrete lining and the defor-mation of its surrounding rock are analyzed by applying the internal water pressure to the whole model in form of volume force,and then the crack-control reinforcement is made with the relevant specification in accordance with the lining stress. With thismethod, the actual statuses of the stress-strain of both the lining and its surrounding rock after the seepage of the internal watercan be better reflected. The result from the application of this calculation method to the design of the concrete lining for the powertunnel of Altash Hydropower Station shows that the quantity of the reinforcement for the concrete lining of the power tunnel is farless than the quantity of its surface force reinforcement, from which some significant conclusions are obtained, while the relevantreference ideas are provided for this kind of tunnel design as well.