复杂地基上Hardfill坝与重力坝破坏模式及稳定性对比分析  

Comparative Analysis of Failure Mode and Stability between Hardfill Dam and Gravity Dam on Complex Foundation

作　　者：聂鸿博 张林[1,2] 董建华[1,2] 胡成秋[1,2] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]四川大学水利水电学院,四川成都610065

出　　处：《水电能源科学》2015年第4期76-80,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51379139;51409179)

摘　　要：Hardfill坝是一种介于重力坝与土石坝之间具有对称梯形断面的新坝型,其结构特性较好,整体应力水平较低,应力集中不明显。为了研究Hardfill坝在复杂地基条件下的适应性问题,选取重力坝为参考坝型,采用地质力学模型破坏试验和有限元计算的方法,对比分析了在外荷载作用下复杂地基上Hardfill坝与重力坝破坏模式及稳定性。结果表明,在复杂地基上,Hardfill坝与重力坝主要在坝基软弱结构面处发生深层滑动破坏,坝与地基出现整体失稳现象,但Hardfill坝坝体变位相对于重力坝较小,超载安全系数较大,稳定性更强。Hardfill dam is a new type of dam whose structural feature is between that of gravity dam and earth-rock dam.It has a relatively low overall stress level and unclear stress concentration.In order to study the adaptability of Hardfill dam on the complex foundation,choosing gravity dam as the reference dam type,the geologic mechanics failure model test and FEM calculation are used to comparative analysis of the failure mode and stability of Hardfill dam and gravity dam on the complex foundation under the action of external load.The results show that on complex foundation,the failure of Hardfill dam and gravity dam mainly appeared at the weak structural surface of the dam foundation,leading to sliding failure and overall instability phenomenon of dam and foundation;but the displacements of Hardfill dam were less than that of gravity dam,and safety coefficient of overload was larger and the stability was more strong.

关 键 词：HARDFILL坝 重力坝 破坏模式 地质力学模型试验 有限元分析 

分 类 号：TV321[水利工程—水工结构工程]