渗流分析中排水孔模拟复合单元法的参数研究

Study on parameter of composite element method for modeling drain hole in seepage analysis

复合单元法是一种求解含排水孔渗流场的新方法.它将排水孔虚含于常规岩石单元内部,并为之建立新的计算模型.分析表明:该方法避免了在数据前处理工作中绘制细小、繁多的排水孔和其与岩石单元间的过渡单元,为含排水孔结构的渗流计算提供了很大的方便,具有较高的实用价值.针对该方法应用时涉及到的不确定参数取值问题,本文通过算例给出含不同形式有压排水孔渗流场计算时复合单元界面参数取值规律,以利工程应用.

The Composite Element Method is a new method for modeling the seepage field of drain holes,in which the drain holes are to be modeled into rock elements,and then a new model for the calculation concerned is set up.Analysis shows that this method has higher practical value,which simplifies the preparation before the calculation and is convenient to make the seepage calculation on the structure containing drain holes.In light of the problem of the determination of the uncertain parameters in the application,the law of the interface parameter determination for the composite elements during the calculation on the seepage fields of various pressure drain holes is given with actual calculation case herein,which is favorable to engineering application.