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直线比例法是计算建筑物基底渗透压力的一种简便的近似方法,但是这种方法没有考虑透水层深度对渗流的影响,用它直接求渗流量将导致很大的误差,特别是在透水层无限深的情况下,就不可能用这种方法进行计算。本文对用直线比例法如何计算渗流量进行了探讨,建立了求渗流量的计算公式,并借助流网导出换算系数m′的计算公式,通过十多个算例,与其它方法进行了验证比较。本文提出的计算渗流量的近似法,公式简单,计算方便,能快速估算渗流量,它适用于均质透水层恒定平面的有压渗流。与其它方法相比,这种方法的精度能满足工程的要求。
The linear ratio method is a simple and approximate method for calculating the basement infiltration pressure of a building. However, this method does not consider the influence of the depth of the pervious layer on seepage. Using it to directly infiltrate the flow will cause great errors, especially in the pervious layer. In infinite depths, it is impossible to use this method for calculations. This paper discusses how to calculate the seepage flow using the linear ratio method, establishes the formula for calculating the seepage flow, and uses the drift net to derive the calculation formula of the conversion coefficient m′. Through more than a dozen calculation examples, it compares with other methods. . The approximate method for calculating seepage flow proposed in this paper is simple in formula and easy to calculate. It can quickly estimate the seepage flow. It is applicable to pressured seepage in a constant plane in a homogeneous pervious layer. Compared with other methods, the accuracy of this method can meet the requirements of the project.