摘要
地下水是导致地质灾害发生的重要因素之一。岩体本身的复杂性及地下水在岩体内随时间而变化造成地下水在岩体内运动机理的复杂性。文章采用数值模拟方法探索地下水在岩体内的运动规律,了解其致灾机理。以岩体结构力学为基础,运用现代分形理论,建立主干裂隙分形网络;根据裂隙发育规模与工程尺度关系将岩体看作拟连续介质与块裂介质混合介质,并根据两类介质接触处水头相等及节点流量相等建立合理的三维非稳定渗流模型;给出渗流模型的有限元解法,开发出相应的有限元软件;给出算例,计算结果体现了主干裂隙在渗流中的强导水作用及网络状裂隙的贮水功能与渗流滞后效应;强调根据裂隙发育规模与工程尺度关系确定合理渗流模型的重要性。
Groundwater is one of the most important factors causing geo-hazards. Movement mechanism of groundwater is very intricate in rockmass, because of the complex structure of rockmass and the complex dynamic nature of water. This paper explores movement of ground water in rockmass by numerical simulation and the mechanism of geo-hazards indued by groundwater. In this paper, fracture network of rock mass is created according to rockmass structure and modern fractal theory. Based on the relationship of fracture and engineering mass, 3-D seepage model is built according to the equivalent of pressure of 2 kinds of media, and an FEM software is developed. The calculation results show that fracture networks dominate water flow within rock mass, and demonstrating importance between fracture developing scale and engineering scale. of building a proper seepage model according to the relationship between fracture developing scale and engineering scale.
出处
《中国地质灾害与防治学报》
CSCD
2006年第1期14-17,共4页
The Chinese Journal of Geological Hazard and Control
基金
国家自然科学基金重点项目(503340600)
教育部博士点基金资助项目(20030611025)
