新疆二八台山区水库库岸稳定及渗漏问题分析与评价

Analysis and Evaluation of Reservoir Bank Stability and Leakage in Erbatai Mountainous Area of Xinjiang

西域砾岩是新疆特有的一种基岩,多为极软岩,抗冲蚀能力差,遇水软化。库岸边坡多呈倒坡,卸荷作用明显,天然状态下边坡稳定性较好,但是蓄水后,由于受水软化作用,易形成库岸失稳和岸坡再造问题。通过二八台山区水库工程,重点论述了由Q_(1)西域砾岩组成的库岸的稳定问题和塌岸量的预测,从而为设计提供坝址选择以及投资的依据。

Western conglomerate is a unique bedrock in Xinjiang,most of which are extremely soft rocks with poor erosion resistance and softening when exposed to water.Most of the reservoir bank slopes are reversed slopes with obvious unloading effect and good slope stability in natural state.However,after impounding,due to water softening,it is easy to cause problems of reservoir bank instability and bank slope reconstruction.Through reservoir project in Erbatai Mountainous Area,this paper mainly discusses the stability of reservoir bank composed of Q1 xiyu conglomerateand the prediction of bank collapse quantity,thus providing basis for dam site selection and investment for design.