Study And Programming Of Saturate & Saturate-Unsaturated Seepage Of Embankment

Seepage destroys and coasts are the problems, which often occurs on embankment engineering, seepage analysis is an important work on the design of civil engineering. When design or evaluate an embankment, the first step we should do it is calculate and analysis the seepage field, but the seepage field calculation is not an easy thing. We often get a bizarre and disorderly seepage field when the embankment is complexity. When we use FEM software to calculate a problem, we should prepare an input data file at first, if the file has to be created by hand, it is will be a very hard work. At present time, the most FEM software of seepage has not an easy way to generate the input data file. Usually we use saturated theory to calculate the seepage field of embankment, but it can't fit the truth. In the embankment, water flows not only in saturated region but also in the unsaturated region. So it is necessary to use the saturate-unsaturated theory when calculate the seepage field of embankment.In this thesis, the major work as following:(1) Give an introduce of seepage analysis model and a brief study on the theory of saturate and saturate-unsaturated seepage of FEM(2) Complied the software of SEEP2, which is a program based on the two dimension saturate theory. And complied the pro process program use compute language VC6.0, the pro process program can read the data file of DXF format;(3) Analysis the difference of seepage field between saturate and saturate-unsaturated theory.The main achievements of the thesis is, compiled the program of SEEP2, which is a two dimension calculate program of saturate seepage for embankment, and compiled the pro process program for SEEP2, the program can read the data file of DXF format.Through the calculation of some project and the contrast with PALXIS, it reveals that the computing result by SEEP2 is reliable and with reason. Through the contrast calculation of saturate with saturate-unsaturated, we can know that water conductivity is a key parameter in the calculation of unsteady saturate seepage, and the free surface line of saturate-unsaturated seepage theory is lower in the upstream side and is higher in the downstream side than saturate. When the water level is falling, the free surface line of saturate theory is lower than saturate-unsaturated.