高心墙堆石坝掺砾心墙料振动孔隙水压力计算模型研究  

Vibration Pore Pressure Calculation Model of Gravel Soil of High Rockfill Dam with Gravel Soil Core

作　　者：曹学兴 何蕴龙 熊堃 迟福东 余记远 谭彬 郭丽娜 CAO Xuexing;HE Yunlong;XIONG Kun;CHI Fudong;YU Jiyuan;TAN Bin;GUO Lina(Huaneng Lancang River Hydropower Co.,Ltd.,Kunming,Yunnan 650214 China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan,Hubei 430072,China;Chang Jiang Survey Planning Design and Research LLC,Wuhan,Hubei 430010,China;Yunnan Technology and Business University,Kunming,Yunnan 651701,China)

机构地区：[1]华能澜沧江水电股份有限公司 [2]武汉大学水资源与水电工程科学国家重点实验室 [3]长江勘测规划设计研究有限公司 [4]云南工商学院

出　　处：《水利与建筑工程学报》2019年第6期123-126,共4页Journal of Water Resources and Architectural Engineering

基　　金：“十三五”国家重点研发计划项目(2018YFC0407105);云南省创新团队项目(2016HC001)

摘　　要：天然防渗土料一般无法满足200 m级以上超高心墙堆石坝强度和变形的要求,在超高心墙堆石坝建设时通常采用掺砾对天然防渗土料进行改性,以提高心墙料的强度和变形特性。在高地震烈度区,高心墙堆石坝的抗震安全性是重要问题,有效应力法是全面评价高坝抗震安全性的一种重要方法,而目前尚没有振动孔压模型可直接用于高坝掺砾心墙料的计算。根据研究揭示的掺砾土料振动孔压增长的增长规律和材料动力试验,提出一个超高心墙堆石坝掺砾心墙料振动孔压模型,模型能真实反应材料动力特性,而且参数确定方便,计算效率高。将模型应用于长河坝心墙堆石坝,得到了大坝地震过程中振动孔隙水压力和超孔压比的分布规律,为类似高土石坝工程建设提供了参考。The natural impervious earth material cannot meet the strength and deformation requirements of over 200 m high core rockfill dam,therefore,in the construction of ultra-high core rockfill dam,the mixed gravel is always used to improve the strength and deformation properties of natural impervious earth material.In the area of high seismic intensity,the seismic safety of high core rockfill dam is a very important issue.Effective stress method is an important method to evaluate the seismic safety of high core rockfill dam.At present,there is no vibration pore pressure model which can be directly adopted in the calculation of high dam with gravel soil core.According to the increasing law of the vibration pore pressure of the gravel soil and the dynamic test of the material,a model of the vibration pore pressure of the gravel soil core of the ultra-high rockfill dam is proposed in this paper.The model can truly reflect the dynamic characteristics of materials,and the parameters are easy to determine with high calculation efficiency.With its application in Changhe dam,the distribution law of vibration pore water pressure and excess pore pressure ratio is obtained by calculation,which could provide a reference for similar high earth rock dam engineering construction.

关 键 词：高土石坝 振动孔隙水压力 模型 砾石土心墙 

分 类 号：TV641.1[水利工程—水利水电工程]