Research In Influence Of Seepage On Supported Deep Foundation Pit

Many accidents are brought out by ground water seepage along with the development of underground projects. However, seepage is often ignored in supported deep foundation pit due to the complicacy. Therefore, it's significant to study characteristic and influence of seepage on soil stress and deformation.Researches in this field are summed up. To make improvement, all the following is studied, based on FEM and coupling theory.1. Experimentations of soil with different sand content are taken out. The seepage character and the relationship betweenk ande are both found out.2. Give some basic theories of FEM and seepage in the deep foundation pit. Make a pilot study of the seepage-stress coupling theory and establish the FEM coupling model.3. Project examples are simulated and computed by FEM. The conclusions are as follow: seepage changes the stress filed and the displacement filed; the coupling results are much more approach to the measured values; seepage can't be omitted in supported excavation.By summary, characters and influences of seepage filed are all indicated in this study. It can be used to instruct the practice, so the security of projects can be more ensured.