土石坝群体震害评估方法

Group assessment method for earthquake damage of earth-rock dam

现有土石坝震害评估方法大多是针对单一土石坝的单体评估方法,在进行评估工作时需要逐一进行计算,并且要求土石坝具有较为详细的资料,因此,造成评估效率低下,对资料不全的土石坝不能进行快速评估。通过对汶川、唐山、通海地震中土石坝破坏比的分析,发现不同程度破坏比随烈度变化的规律比较明显,并给出了不同程度破坏比的经验取值范围,最后,提出了基于破坏比的土石坝群体评估模型,并采用海城地震土石坝震害实例对该模型进行验证,结果表明评估精度较高,克服了单体评估方法的不足。

The existing earth-rock dam earthquake dam, and in the process of evaluation, the dams earth-rock dam must be detailed, which results in damage assessment methods are need to be calculated one by lower assessment efficiency and when the data of the dam is incomplete. Analyses of the Tonghai earthquakes found that the variation law of the The experience range of varying degrees damage ratio mostly for the single earth-rock one and the information of the is hard to do rapid assessment earth-rock dam damage ratios of Wenchuan, Tangshan and varying degrees damage ratios change with the intensities was given through the analysis. The earth dam group assessment model based on damage ratio was proposed and was verified by the earth-rock dam earthquake damage case of Haicheng earthquake. Results show that the method presented in this paper has higher accuracy and can overcome the disadvantage of existing assessment method.