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Safety of RCC Gravity Dams over 200m Considering Hydraulic Fracturing

机译：考虑水力压裂的200m以上碾压混凝土重力坝的安全性

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摘要

Longtan RCC gravity dam is 192m high for first stage and will be 216. 5m high after second stage construction. Guangzhao RCC gravity dam is 200. 5m high. Special technical specification should be made for dams higher than 200m according to Chinese design specification. The safety of high gravity dams with consideration of hydraulic fracturing under high water pressure has been studied in this paper. The authors have developed a lab model for concrete hydraulic fracturing simulation and comparing analyses have made with FEM program for concrete hydraulic fracturing. Studies have been made on Grand Dixence gravity dam (H = 285m) and a given gravity dam (H=216. 5m) with FEM. The results show that the design specification for Grand Dixence gravity dam is reasonable considering hydraulic fracturing influence. However, the safety of dams higher than 200m designed according to non-tensile criterion should be carefully investigated, especially RCC gravity dam.
机译：龙滩碾压混凝土重力坝一期高192m，二期工程高216m。5m。光肇碾压混凝土重力坝高200. 5m。对于大于200m的大坝，应根据中国设计规范制定特殊的技术规范。研究了考虑高水压下水力压裂的高重力坝安全性。作者开发了用于混凝土水力压裂模拟的实验室模型，并将分析与FEM程序对混凝土水力压裂进行了比较。用有限元法研究了大迪克森斯重力坝（H = 285m）和给定重力坝（H = 216。5m）。结果表明，考虑水力压裂影响，Grand Dixence重力坝的设计规范是合理的。但是，应仔细研究按非拉伸标准设计的200m以上大坝的安全性，尤其是碾压混凝土重力坝。

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