| In recent years, with the development of the high buildings and undergroundconstructions, he deep foundation pit is becoming common normal. The deep foundationpit is often built nearby the lake and river, so that the construction of the pit will beinfluenced by the hydraulic factors of the lake or the river. Also the pit construction will beinfluenced by the moving loads. However, the loads is generally considered as static loadsin the calculation of deep foundation pit, so that the result is not so accurately that dynamicresponse between moving loads and the foundation. So it is significant to analyze the forceand deformation rule of the foundation subjected to the moving loads.Base on the project of the east subway station in Aixi lake in Nanchang，it is using theMIDAS/GTS software to product the three-dimensional element model，in order to knowthe deformation law of step-by-step excavation progress. In addition, the harmonic load isapplied on the completed excavation model for researching the dynamic response of thedeep foundation.The main contents and conclusions:(1)Based on real projects, finite element model is established by MIDAS/GTS tosimulate excavation of deep foundation pit of subway station. Based on the model, thehorizontal and vertical deformation of the pit and the axial force of the support arecomputed in the progress of the foundation construction. It is making a useful reference forthe design and the construction of the foundation;(2)In order to research the dynamic response of the piles under vehicle load, theharmonic load is applied on the completed excavation model. And then, it is discuss aboutdifferent kind of parameters, such as the load, speed, distance from the pit.(3)Analysis of monitoring data of a project example，the results show that the stabilityof the formation and the safety of construction and surrounding environment. This resultcan provide reference to the informational construction of the deep foundation pit. |
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