胡冲水库堆石混凝土重力坝枢纽布置及结构计算

Arrangement and Structural Calculation of Rockfill Concrete Gravity Dam of Huchong Reservoir

针对胡冲水库坝址区两岸强风化岩体结构面发育、岩体风化厚度大、强度低等特点,结合地质勘探和石料场岩石质量及储量,综合考虑坝型适宜性、枢纽布置、筑坝材料和工程投资等因素,优选布置紧凑、筑坝建材丰富和综合投资较优的重力坝方案。大坝中部布设开敞式溢洪道,能有效解决岸边溢洪道布置困难和泄洪不及时风险。设计计算成果表明,坝体结构体型参数设定合理,应力分布均匀,抗滑稳定满足规范要求,可为工程顺利施工建设提供重要设计技术支撑。

In view of the topographical features such as well-developed structural plane,large weathering thickness and low strength of the strongly weathered rock mass on both sides of the dam site of Huchong Reservoir,combined with geological exploration,the rock quality and reserves of quarry,and comprehensive consideration of the dam type suitability,hub layout,dam construction materials and project investment,the gravity dam scheme with compact layout,abundant dam construction materials and better comprehensive investment is preferred.The arrangement of open spillway in the middle section of the dam can effectively solve the problem of spillway layout and untimely flood discharge risk.The calculation results show that the shape parameters of dam body are reasonable,the stress distribution is uniform,and the anti-sliding stability meets the specification requirements,which can provide important design technical support for the smooth construction of the project.