摘要
通过研究碾压混凝土坝防渗体的渗流规律及拉应力对其渗透性的影响,从大坝防渗结构的抗渗性分析出发,采用自行设计的试验装置,测定了大坝二级配混凝土在不同拉应力下的渗透性。试验结果表明:大坝二级配混凝土的启动压力梯度比普通混凝土要小;在结构设计中可以近似地用线性Darcy定律进行设计分析;在考虑拉应力条件下,可以在原有设计抗渗等级的基础上增加一个等级。
By studying the seepage law of impervious body of RCC dam and the influences of tensile stress on permeability, a test device was designed for studing the permeability of second-graded concrete with rich plastic material under different tensile stress. The experimental t^sults show that the initiating pressure gradient of second-graded concrete is snmller than that of ordinary concrete, the linear Darey＇s law can be approximately＇ used for the structural analysis in the design, and the designed permeability level should be increased by two degrees in considering the tensile stress conditions.
出处
《水力发电》
北大核心
2010年第10期101-103,共3页
Water Power
基金
国家自然科学基金重点项目(50539040)
