考虑软岩劣化影响的黏土心墙风化料坝设计  

Design of clay core wall weathered dam considering the deterioration of soft rock

作　　者：杨勇 卢凌 YANG Yong;LU Ling(Henan Lingjie Water Conservancy Survey,Design and Research Co.,Ltd.Yunnan Branch,Kunming 650231,China;Yunnan Xicheng Survey and Design Co.,Ltd.,Kunming 650231,China)

机构地区：[1]河南灵捷水利勘测设计研究有限公司云南分公司,云南昆明650231 [2]云南玺程勘察设计有限公司,云南昆明650231

出　　处：《水利建设与管理》2024年第9期53-58,共6页Water Conservancy Construction and Management

摘　　要：软岩料受外部环境因素影响易造成颗粒劣化,作为筑坝材料,其劣化会使坝料抗剪强度、压缩模量、渗透系数和变形模量降低,湿化变形和流变变形增加,大坝结构设计中应建立坝料劣化模型,计入其劣化作用的影响。董棕堡水库坝型为黏土心墙风化料坝,最大坝高62m,接近高坝,全断面采用砂泥岩风化料筑坝。设计中考虑坝料劣化引起的坝料强度、模量衰减影响,经计算分析得出设计坝坡坡度为1∶2.25;由于坝体变形较大,大坝在设计中提出了更高的填筑标准与级配要求。The deterioration of soft rock materials due to external environmental factors can lead to particle degradation.As dam construction materials,such deterioration reduces the shear strength,compressive modulus,permeability coefficient,and deformation modulus of the dam materials,while increasing wetting deformation and creep deformation.In the structural design of dams,it is essential to establish a dam material deterioration model to account for the effects of this deterioration.The Dongzongpu Reservoir dam is a clay core wall weathered material dam with a maximum height of 62 meters,approaching the category of high dams.The entire cross-section of the dam is constructed using weathered sandstone and mudstone materials.The design takes into account the impact of strength and modulus degradation of the dam materials due to deterioration.Through calculation and analysis,the design slope of the dam is determined to be 1∶2.25.Due to significant deformation of the dam body,higher standards for filling and grading requirements are proposed in the design.

关 键 词：软岩 劣化影响 坝坡 变形 

分 类 号：TV641.4[水利工程—水利水电工程]