摘要
本研究主要目的在于建立可同时考虑土壤参数及体力(body force)随孔隙率(porosity)变化之一维耦合地层下陷黏弹塑性数值模式,期能更精确地模拟现地之地层下陷现象。研究中加入水力传导系数、杨氏系数及体力随孔隙变化之影响,推导超抽地下水引致土壤压密之黏弹塑性控制方程式、初始条件及边界条件,并采用有限差分法建立数值计算模式。除以建立完成之模式测试评估体力、土壤参数随孔隙率变化、塑性效应及黏滞效应对土壤压密之影响程度外,并配合现地实测下陷数据,以验证模式之正确性。研究结果显示,一维黏弹塑性地层下陷模式可有效地仿真台湾现地之地层下陷变化。
This study developed a 1D nonlinear viscoelastic-plastic land subsidence model by considering the change in soil parameters and body force as a function of porosity. The hydraulic conductivity, Young＇s modulus, and the relationship between the porosity and body force were considered in the model to derive the governing equation. The numerical model developed wil be veriifed using ifeld data. The goal of this study is to forecast the trend in land subsidence and provide an early-warning system.
出处
《上海国土资源》
2014年第4期25-30,共6页
Shanghai Land & Resources
基金
台湾经济部水利署经费支持项目
关键词
黏弹塑性
地层下陷
体力
土壤参数
孔隙率
viscoelastic-plastic
land subsidence
body force
soil parameters
porosity
