| Well-point Dewatering which is an important measure in the rainfall construction of the foundation pit engineering can overcome flowing sand, steady foundation pit slope, reduce the groundwater level, prevent the bottom of the pit uplift and accelerate the consolidation of the soil, so that the foundation pit engineering below the natural groundwater table is proceeding in a relatively dry environment. Well-point Dewatering mainly involves the reasonable selection of scheme and the scientific configuration of engineering quantity. In actual engineering, the selection of the rainfall scheme is simple, but the optimization design of the configuration of rainfall quantity is seldom.The dissertation is based on the foundation pit engineering of the Dingneng international. The foundation pit belonging to a deep one contains pebble beds which is5meters thick and larger permeability coefficient, coexisting with existing building. To ensure the foundation pit safe, the design of the rainfall is needed. Calculating and selecting the reasonable rainfall way, well spacing, well number by the conventional method is the key to realize the construction of the foundation pit engineering and reduce the deformation of the consolidation.Aim at the above problem, this text states the method and the basic theory of the foundation pit dewatering firstly, and then seeking the specific measure by researching the basic theory, so as to ensure the science and rationality of the rainfall measure and the method of draining the water. And then make optimum design of the engineering using optimizer. Establishing3D Seepage-stress coupling model causing by dynamic deformation of ground when drawing water by means of Comsol Multiphysics, the Multi Field Coupling Analysis Software, By results of the numerical simulation and the analysis of the parameters and the inversion optimization, determining the appropriate well spacing, well number and the quantity of pumping. |
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