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水电工程设计中,常遇到在复杂地基上修筑水工建筑物的问题,铜街子水电站筏闸工程即是实例之一。该筏闸闸室全部位于第五层玄武岩上,中间闸首前后段有破碎带斜切通过,其物理力学性能较差,闸室底板两侧嵌固于岩石基础上,而底板与基础弹性模量相差悬殊,其比值达14倍以上,且因地形、地质构造之故,上闸室左侧底板约有50m长不能达到嵌固要求,地质和受力条件均不利。本文简要介绍这种复杂地基上筏闸结构实验研究的一些成果。
In the design of hydropower projects, it is often encountered the problem of building hydraulic structures on complex foundations. The project of raft gates at Tongjiezi Hydropower Station is one example. The raft lock chamber is located on the fifth floor of the basalt, before and after the middle section of the first section of the sluice with a bevel cut through the poor physical and mechanical properties, both sides of the lock chamber floor embedded in rock on the basis of the floor and the base elastic modulus Due to the topography and geological structure, about 50m long of the left floor of the brake chamber can not meet the requirements of embedding, and the geological and stress conditions are unfavorable. This paper briefly introduces some of the experimental results of the raft gate structure on this complex foundation.