Study On Deep Foundation Enclosure Excavation And Nonlinear Rheology

The deep foundation excavatfon takes many methods of enclosure in city construction, Today there are some immature experiences and lots of teaches on the prediction, prevetion and the control of environmental detrimental effects (mainly uneven soil set outside foundation pit and effect on cityscape traffic ,etc. )caused by deep foundation excavation construction taken in many kinds of enclosure structures .Based on the research works of predecessor ,the theory on the displacement of soil strata in deep foundation excavation construction and its application are studied in detail . By analysing the supervision, statistics from, the practical excavation engineering, soil rheology is thought to be the main reason of the displacement heavy of the soft soil and the destruction of the enclosure structure, in deep foundation excavation construction on condition of the high theriomorphic of enclosure structure and good seepage resitting . The experical formula of soil settlement in excavation are also formulated . Using the theory of soil rheology , The relationship among settlement , plumpy and excavation The nonlinear rheological FEM program pertinent to excavation is also established used and its availability is proven . Finally the method using supervision statistics is represented in excavation construction , which predict thecritical axial force of bracing in enclosure structure .In the paper , the theory of geomechanics and the engineering are collaborate coherently. Some results can be applied to excavation constructions in some degree .