导流隧洞堵头稳定性分析  

Analysis of stability of plug for diversion tunnels

作　　者：伍鹤皋[1] 苏凯[1] 春光魁[2] 罗林[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]中国水电顾问集团西北勘测设计研究院,陕西西安710065

出　　处：《武汉大学学报（工学版）》2006年第3期6-10,40,共6页Engineering Journal of Wuhan University

摘　　要：在总结国内外导流隧洞封堵设计一般原则的基础上,对堵头稳定性校核的各种计算理论进行了探讨.结合工程实例,介绍了使用有限元方法计算堵头稳定性的过程和步骤,着重分析了围岩变形模量、堵头体型对混凝土与围岩接触面上剪应力分布的影响,结果表明围岩变形模量越大,接触面上的剪应力分布越不均匀;采用上游大下游小的楔形体形状可以降低接触面上剪应力的峰值,使剪应力分布更加均匀,减少局部破坏的机率.The common design criteria of the diversion tunnels＇ plugging are summarized first; and then various calculation theories of the stability of the plug are discussed. In light of the practice of a project, both the procedure and steps of the plug stability analysis are introduced. Then the influences of the rock deformation modulus and the plug body type on the shear stress along the contact surface between the rock and plug concrete are analyzed. The result shows that the decentralization of the shear stress increases with the increment of the rock deformation modulus; and if the plug body type, in which the upstream section is bigger than the downstream one, is adopted, the shear stress will distribute more uniformly; and the peak value will be reduced; so the probability of local failure is also decreased.

关 键 词：导流隧洞 堵头 抗滑稳定 安全系数 有限单元法 

分 类 号：TV551.12[水利工程—水利水电工程]