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首页> 外文会议>Long Time Effects and Seepage Behavior of Dams >SEEPAGE, STATIC AND DYNAMIC COMPUTATION IN SELECTING CORE TYPE OF A 300 M HIGH EMBANKMENT DAM BETWEEN VERTICAL AND SLOPING CORE
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SEEPAGE, STATIC AND DYNAMIC COMPUTATION IN SELECTING CORE TYPE OF A 300 M HIGH EMBANKMENT DAM BETWEEN VERTICAL AND SLOPING CORE

机译：竖井和坡洞之间300 m高路堤坝芯类型选择的渗流，静力和动力计算

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摘要

By incomplete statistics, there are 12 over-230-m-high dams made of local material in the world, which are being built or have been built, and the types of their anti-seepage core are mainly soil vertical core and sloping core. A being planed rockfill dam with core is 310m high, an extra-high dam, and its core type should be decided considering many factors. By Seepage FEM analysis, the Water Head Gradient of sloping core is larger than that of vertical core, yet the gradient in both dams and their foundation doesn't exceed the allowing gradient. Static analysis shows that the sloping core can better prevent hydraulic fissure yet both types are safe because the clay core is sophisticated with gravel. By Dynamic FEM analysis, two type cores have the equal aseismic capability, and because the dam site is in low intensity seismic area, both dams' dynamic response is not intensive. The computation shows that seepage, static and dynamic issues are not the key factors in selecting the core type. The scope of foundation treatment and filling quantity of rockfill dam with sloping core are larger than those of rockfill dam with vertical core, which leads to additional 170 million Yuan investment, so vertical core is adopted.
机译：据不完全统计，目前在建或已建成的由当地材料制成的超过230米高的大坝有12个，其防渗芯的类型主要是土体垂直芯和倾斜芯。计划中的堆芯坝高310m，超高坝，其堆芯类型应考虑多种因素来确定。通过渗流有限元分析，倾斜岩心的水头梯度大于垂直岩心的水头梯度，但两个大坝及其基础的坡度均不超过允许坡度。静力分析表明，倾斜岩心可以更好地防止水力裂缝，但两种类型都是安全的，因为粘土岩心带有砾石。通过动态有限元分析，两种类型的岩心具有相同的抗震能力，并且由于坝址位于低强度地震区，因此两个坝的动力响应都不会很强。计算表明，渗流，静态和动态问题不是选择岩心类型的关键因素。斜心堆石坝的基础处理范围和填土量大于垂直心堆石坝，需要追加投资1.7亿元，因此采用垂直心堆。

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