The Numerical Simulation Of Precipitation In The Vertical Well Based On ABAQUS

The vertical shaft precipitation is playing the vital role in the vertical shaft construction, on the one hand the water level reduces causes the vertical shaft construction is carried on in security and in the dry environment, meanwhile increase the soil layer stability; on the other hand, when peripheral environmental condition difference, vertical shaft neighbor existence building, precipitation not normal, the vertical shaft precipitation easy to cause the hole excavated for building foundation peripheral ground subsidence and the small scope earthquake, therefore the vertical shaft precipitation is the important research content in the project.This article first elaborates the stability-seepage equation, non-stability-seepage equation, infiltrates the flow field and the stress coupling fundamental equation, summarizes the transfusion finite element method, introduce the application of large-scale non-linear finite element software ABAQUS in the transfusion, and confirms the feasibility of its analysis in precipitation free surface. The paper research the water well the un-water aperture size to the vertical shaft around the precipitation influence, Pulls out the water well depth to the vertical shaft around the precipitation influence, Pulls out the water well the pump speed to infiltrate the flow field to the vertical shaft around the influence, when the pumping wells is arrange in a circle. As soon as pulled out behind the water well to arrange turned around to fill the well。The paper studied has returned to fills the well circle radius and returns to fills the well depth to infiltrate the flow field and the stress field influence. At under the guarantee of vertical shaft precipitation premise, reduces the settlement of ground.This article calculates the above rule, and carries on the precipitation design of this local vertical shaft project based on this rule, gives has pulled out the water well with to return to fills the well the distribution, the geometry parameter, the pump speed, and confirm the design feasibility, and obtain the precipitation time course through the instantaneous transfusion model computation, moreover give the freedom water surface position of the essential node, the field of velocities as well as the distribution of surface subsidence.Use the law of this paper studies, it can be directly reach the optimal layout situation of recharge wells and pumping wells by the depth of rainfall (Taking into account the effect of economic and precipitation);Ground Subsidence consider recharge, reduces the earthquake what caused by ground subsidence and the too much pumping;and use the time-analysis, the location of precipitation can be drawn with time, also under construction needs, by changing the size of the pumping capacity of position adjustment of precipitation, greatly facilitate the construction.Thus, based on ABAQUS analysis of the shaft for shaft of precipitation to provide a powerful tool, has had a major economic and social benefits, has a good prospect.