抽水地面沉降中含水层渗流变形耦合模型研究  

Study on Coupled Model for Aquifer Seepage Deformation During Pumped Ground Subsidence

作　　者：王非[1] 缪林昌[1] 黎春林[2] 

机构地区：[1]东南大学,南京210096 [2]铜陵学院,安徽铜陵244000

出　　处：《铁道工程学报》2011年第7期1-5,共5页Journal of Railway Engineering Society

基　　金：东南大学中央高校基本科研业务费资助;安徽高校省级自然科学研究项目(KJ2011Z375)

摘　　要：研究目的:上海和常州的地面沉降观测数据表明在深层抽水时含水层会发生较大的压缩变形,从而导致含水层渗透性的变化,但在现有模型中含水层变形通常被忽略。针对这一问题,本文提出可以考虑抽水过程中含水层渗透性随水位降深发展的实时变化的渗流-变形耦合模型。研究结论:(1)砂性土中孔隙比与渗透系数在半对数坐标中的线性关系;(2)上海某抽水试验场水位降深计算值与实测值的比较证明了所提出模型的有效性;(3)随着抽水层深度的不断加深,砂土压缩性不断增大,在抽水地面沉降计算中采用渗流-变形耦合模型势在必行。Research purposes： The observated data on the ground subsidence in Shanghai and Changzhou demonstrate that the big compression deformation of the pumped aquifers in these two places occurs to cause the permeability change of the aquifer during pumping in deep stratum. However, the current model often ignores the aquifer deformation. In this paper, for solving this problem, a coupled seepage and deformation model based on the actual change of the aquifer permeability with up and down of the water level is offered. Research conclusions：Based on the research , the following conclusions are drawn： （ 1 ） The linear relation between void ratio and permeability coefficient of sandy soil in half logarithm coordinate is found. （2） The comparison of the measured and calculated data demonstrates the effectiveness of the model presented in this paper. （3） With the increasing of the pumping depth, the compressibility of sandy soil becomes lager, so it is imperative to use the seepage - deformation coupled model to calculate the subsidence of the pumped ground.

关 键 词：含水层变形 渗透性 孔隙比 压缩性 耦合计算模型 

分 类 号：P641[天文地球—地质矿产勘探]