Numerical Analysis Of The Foundation Pit Slope Protection Board, Grid And Anchor Combined Support System

In recent years,with the rapid development of urban construction, the developmenttrend of the building is that the number of layers and the height is increasing, and the pitdepth deeper. The form of structural foundation ofen use pile, raft, box-type foundationand so on, to protect the safety of the adjacent buildings, structures and the safety ofdeep foundation construction site, it is necessary to carry out excavation support. Thattraditional excavation waste of material resources and delay the schedule, it is notconducive to the rapid development of the city.This paper consider in practical engineering, often encounter a tight schedule, goodsoil conditions, foundation pit is not very deep, to requir the foundation pit supportingengineering of low cost, it is ofen to use simple horizontal support, cement soil pile, soilnail, bolt, underground continuous wall for the form of excavation and so on.Thesetraditional foundation pit support not only material can only be used once basically andunrecyclable utilization, and long construction period. Therefore, based on the project,this paper proposes a new excavation of foundation pit slope protection board, grid andanchor combined support system,and carry on the numerical simulation analysis for it.As the object of study that the grid structure that based on the composite foundation pitsupport system, it is to establish a numerical model for pyrimid space gird with thefinite element analysis software ANSYS, and do the static analysis, the modal analysisand seismic time history analysis, to study on the mechanical properties, dynamicproperties and the stress, strain response under the action of earthquake of the gridstructure; At the same time,it is to establish the whole model with this kind of compositefoundation pit support system and foundation pit entity, by the half-sine wave load asmoving load, the paper investigates the moving load response of the compositefoundation pit support structure with ANSYS numerical analysis,analysis the feasibilityof the composite support system on the basis of numerical simulation, and it is to putforward to some useful suggestions for designing the composite supporting system.Through the study of this subject, it is think that this composite support system can beapplied to the tight schedule;the clay soil of good soil conditions, which is suitable foranchor rod construction;the excavation engineering which excavation depth is within15m and can put slope. It is the use of new technology to replace the traditionalconstruction method that high consumption,high cost, long construction period, is akind of innovative solutions and measures for the construction of foundation pit, in the case of effectively guaranteeing the pit safety, it has an important practical significanceto reduce the construction cost, and shorten the construction period.