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SEEP/W 2016——地下水渗流分析软件

SEEP/W 是一款岩土体渗流分析软件,可以分析从简单的饱和问题到复杂的非饱和问题,稳态渗流和瞬态渗流。软件可以定义渗透各项异性,通过瞬态分析,可以得出不同时刻不同点的孔隙水压力分布状况,其结果可以被用于SLOPE/W研究边坡、路堤稳定性随时间变化的关系。

在污染物运移问题中,地下水渗流速度是关键因素之一,通过SEEP/W软件计算出地下水渗流速度,应用于CTRAN/W软件分析污染物的扩散、转移。

典型应用:
坝体、堤防各种运行工况渗流分析
边坡稳态渗流分析,降雨或水位变化引起的边坡瞬态渗流分析
水库抽水后水位降低引起的超孔隙水压力的消散
储水结构,如泻湖和废料池下的地下水位的抬升
地下排水沟和注水井的影响
蓄水层被抽水而引起的水位降低
流入基坑中的渗流量等

SEEP/W软件的特点:
分析问题类型包括稳态的限定和非限定渗流、瞬态渗流、平面渗流和二维轴对称分析。

边界条件类型包括:总水头、压力水头、节点流量和单位流量,均可指定为常数或者随时间变化的函数、还可以定义库容曲线边界,以及溢出边界。

简单方便的定义渗流分析参数,软件内置的估计方法可以用土体类型或粒径数据来估计土水特征曲线和渗透系数函数。

瞬态分析可采用自适应的时间步长,从而保证瞬态分析中在边界条件突变时的时间步长为最佳的时间步长。

多种方式查看和整理计算结果:云图、等值线、矢量图、单宽截面流量、动画、图表等等。

SEEP/W is a finite element CAD software product for analyzing groundwater seepage and excess pore-water pressure dissipation problems within porous materials such as soil and rock. Its comprehensive formulation allows you to consider analyses ranging from simple, saturated steady-state problems to sophisticated, saturated/unsaturated time-dependent problems. SEEP/W can be applied to the analysis and design of geotechnical, civil, hydrogeological, and mining engineering projects.

SEEP/W can model both saturated and unsaturated flow, a feature that greatly broadens the range of problems that can be analyzed. In addition to traditional steady-state saturated flow analysis, the saturated/unsaturated formulation of SEEP/W makes it possible to analyze seepage as a function of time and to consider such processes as the infiltration of precipitation. The transient feature allows you to analyze such problems as the migration of a wetting front and the dissipation of excess pore-water pressure.

Easy to Use
Defining a Seepage/Air flow Model
Beginning an analysis is as simple as defining the geometry by drawing regions and lines that identify soil layers, or by importing a DXF? file. Then graphically apply boundary conditions and specify material properties. Material properties can be estimated from easily measured parameters like grain-size, saturated conductivity, saturated water content, and the air-entry value.

Viewing the Analysis Results
Once you have solved your seepage analysis, SEEP/W offers many tools for viewing results. Generate contours or x-y plots of any computed parameter, such as head, pressure, gradient, velocity, and conductivity. Velocity vectors show flow direction and rate. Transient conditions can be shown as a changing water table over time. Interactively query computed values by clicking on any node, Gauss region, or flux section. Then prepare the results for your report by adding labels, axes, and pictures, or export the results into other applications such as Microsoft? Excel? for further analysis.

Typical Applications
SEEP/W can model almost any groundwater problem, including:
Dissipation of excess pore pressure after reservoir drawdown
Changes in pore-water pressure conditions within earth slopes due to infiltration of precipitation
Mounding of the groundwater table beneath water retention structures such as lagoons and tailings ponds
Effect of subsurface drains and injection wells
Drawdown of a water table due to pumping from an aquifer
Seepage flow quantities into excavations
Use AIR/W and consider the true matric suction (Ua-Uw) mechanisms
Integrate with TEMP/W and consider flow in freezing and thawing soils
plus many more!


Features

Analysis types include steady-state confined and unconfined flow, transient flow, 2-D flow in a cross-section or in plan view, and 3D axisymmetric flow.

Boundary condition types include total head, pressure head, or flux specified as a constant or a function of time; pressure head; transient flux as a function of computed head; review and adjustment of seepage face conditions.
Volumetric water content and conductivity functions can be estimated from basic parameters and grain-size functions.

Adaptive time stepping to ensure the use of optimal time steps in transient analyses with sudden changes in boundary conditions.
Flow path deliniation.

And many more!