Reinforced Sand Cushion In The Soft Foundation Treatment

Along with our country highway construction scale daily expansion, usually want to construct the embankment frequently in the soft subsoil. Because the soft soil has characteristics of low intensity, high compressibility, low permeability and so on, therefore, must carry on processing to the soft base to be able to satisfy in the use the request. The geotextile material is one kind of new rock soil engineering material, the application geotextile material reinforcement sand blanket processes the soft base, may is one kind simple fast and the economical processing method. The reinforced sand blanket is a kind of method inside the soft base shallow layer processing, it is spreads one or the multi-layer geotextile material in the traditional sand blanket (for example geotextile material, geotextile, geogrid, geogrid cell) forms. This method took an item applies the new material and the new technology, may improve the soil body the intensity characteristic and the strained condition, thus enhances the ground supporting capacity, reduces the differential settlement, the increase embankment stability, speeds up construction speed and so on. This according to a flood of, This text according to the massive model test, the finite element analysis as well as the project example analyzes the reinforced sand blanket the action mechanism as well as to the ground supporting capacity, the subsidence and the embankment stable influence.When meets the deep soft soil ground or has the strict request to the building subsidence, uses the reinforced sand blanket and the pile composite foundation union application can achieve the more ideal processing effect. The reinforcement sand blanket and the pile composite foundation jointly "Geosynthetic-reinforced and pile-supported earth platform composite foundation" ,this method both has the level to strengthen the body (reinforcement sand blanket), and has the vertical enhancement body (group pile), therefore, has enhances the ground supporting capacity, reduces the ground differential settlement, maintenance stability of slope, speeds up construction progress and so on. This article uses the finite element ANSYS software "Geosynthetic-reinforced and pile-supported earth platformcomposite foundation" to carry on the computation analysis, it is divided by two kinds of circumstances proceeds: One is not add the geotextile material ,the other is adds two geotextile material,obtains: After the reinforcement the embankment subsidence reduces obviously; Stress distribution obvious even, enormously improves foundation stress situation characteristics and so on. Analyzed to distinguish the changes geotextile material just the rigidity, the layer ,the pile spacing to the embankment subsidence, the stress distribution, the stress share ratio influence effect.