论文部分内容阅读
RCCD自问世以来,发展十分迅速,但其防渗性一直是人们关注的焦点。RCCD的防渗性主要包括两个方面;碾压混凝土(RCC)本体的防渗性和层间结合面的防渗性。其本体的防渗性可以满足水工建筑物的要求,但其层面防渗性较差,必须要进行层面处理。现场压水试验的碾压混凝土(RCC)渗流常处于非恒定状态,压水试验规程中按恒定流确定渗透系数的方法不再适用。本文仿照混凝土试件快速试验确定渗透系数的方法,推导出压水试验过程中渗流处于非恒定状态条件下碾压混凝土求渗透系数的方法和公式。
Since the advent of the RCCD, the development has been very rapid, but its impermeability has always been the focus of attention. The impermeability of RCCD mainly includes two aspects: the impermeability of RCC body and the impermeability of interlayer interface. The impermeability of its body can meet the requirements of hydraulic structures, but the impermeable layer of its level, we must deal with the level. The RCC seepage flow in the field water pressure test is often in a non-constant state. The method of determining the permeability coefficient according to the constant flow in the pressure water test procedure is no longer applicable. In this paper, according to the rapid test of concrete specimens to determine the permeability coefficient, the method and formula for calculating the permeability coefficient of RCC under the condition of unsteady seepage flow are derived.