摘要
在综合已有文献的基础上 ,分析了最近几十年来用于模拟抽取地下水引起地面沉降的数学模型 ,按照水流模型和土体变形模型的结合方法将地面沉降模型归纳为三种类型 ,即由水流模型获得各土层的水头变化、再根据水头变化计算土层变形的两步模型 ;仅考虑垂直方向变形与孔隙水压力变化的相互作用 ,而水平方向只考虑渗流、不考虑变形的部分耦合模型 ;考虑孔隙水压力变化和土体变形的相互影响和作用的完全耦合模型。论述了每种类型模型的主要特点、代表性模型及其不足之处 ,并指出三维渗流和变形的耦合分析是地面沉降模型进一步研究的方向 ,同时作为检验模型合理性和适用性的手段 ,还应加强地面沉降的室内模型试验。
Based on the present literature,the mathematical models in simulation of land subsidence induced by pumping in the past decades are summarized.They are sorted into three types:the first is two-step model.It deduces the variations of groundwater pressure in every soil layer by groundwater flow model,then calculates the soil deformation according to the variations;the second is partly coupled model.It considers the interaction between the soil deformation and groundwater pressure only at the vertical direction,but at the horizontal direction only the seepage but not the deformation is included;the third is fully coupled model,which considers the interaction between the soil deformation and groundwater pressure completely.The advantages and disadvantages are showed for each type of model.Finally it is put forward that the three dimensional coupled model should be studied further,and the more attention should be given to the laboratory model test,which is used to examine the reasonability and the suitability of a model.
出处
《中国地质灾害与防治学报》
CSCD
2002年第2期1-6,24,共7页
The Chinese Journal of Geological Hazard and Control
关键词
地面沉降
抽取
地下水
土体变形
数学模型
渗流
land subsidence
pumping of groundwater
deformation of soil mass
mathematical model
