溶蚀岩体的溶渗作用及岩溶坝区的渗透性研究

Leaching of solution rock and permeability study under karst-engineering geological condition

溶蚀岩体的溶蚀作用漫长而不均,处于岩溶坝区其溶渗作用会显著加剧,机理更为复杂。坝区的渗透特性受高应力场的作用,其固有的非均质各向异性更趋复杂,采用确定性的方法不能准确的描述其本质特性。在分析溶蚀岩体溶渗作用的基础上,对K.G.Magomedov预测模型进行了讨论,提出了岩溶管道渗透特性的处理方法。对岩溶坝区透水性随机场进行分析,考察岩溶坝区主要的两场作用,即渗流与应力场的耦合,基于Taylor随机有限元建立了渗流应力耦合的随机微分方程格式,并对耦合随机模型反演求解渗透参数提出了思路。

Inherent heterogeneous and anisotropic properties of the seepage under karst-engineering geological condition expressed more complexity because of the effect suffered leaching and highly stress field. In this article, K.G.Magomedov抯 forecast model has been discussed based on analyzing leaching around the dam site. A disposal way for the permeability in karst pipeline has been given. The penetrating stochastic field around the dam site has been analyzed. A stochastic differential equation has been established for seepage-stress coupling based upon Taylor random FEM. A way has been given for seepage coefficient solution by using the coupling random modeling.