Exerting degree of pile-soil bearing capacity in composite foundation

To solve the problem of the forming conditions of composite foundation and discuss the exertion grade of foundation pile-soil bearing capacity,the change of composite foundation pile-soil resisting,pile-soil load and the curve of load-settlement are determined through the testing of laboratory mold.The test proves that because of high pile-soil modules,the pile-soil stress ratio changes in direct proportion accordingly,the bearing capacity of pile-soil acts lowly and the composite foundation can not be formed when high bearing capacity is treated by pile.Simultaneity,this essay analyzes the normal 4 composite foundation models.There are some conditions for forming the composite foundation.It isn’t regarded that if the piles and foundation are separated,the composite foundation must be formed and the composite foundation can not formed without cushion.The exertion grade of foundation pile-soil bearing capacity is main basis for assessing the composite foundation.It can provide the theory for selecting the calculation method for the composite foundation if the forming conditions are known adequately.