Study On The Arched Row Pile Supporting Structure For Foundation Pit And Its Application

Company with our country urbanized rapid development the exploition and utilization of underground space in saving land resources , regulate city use of land structure , the city's infrastructure construction and national defense building grade aspect would exert ingravescent use. It is clear that, without city underground space of validity exploition and utilization Without civic sustainable development, also, in this way, it could not help but acquire large-scale deep excavation problem, also to deep excavation with shoring putting forward even more high, tighten up of quest. At the same time due to the complexity, regionality and uncertainty grade point, accident in engineering still build up sometimes, deep excavation technical shoring problem became engineering circle of hotspot ,emphases problem.In the paper, the foundation lies in Longquan.ChengDu, there is important built needing shielding. We are concerned about the important question is shoring design proposal whether security, feasible. To deal with these questions, a new retaining structure called the arced row pile shoring is put forward and the structure and design method are also indicated in this thesis.Textual research content include there in after several Aspect:(1) Generalizing the current research status on the design and construction of the deep foundation pit in the world,and also summarizing the calculating models and the theories,and giving a introduction of the arched row pile supporting structure's development.(2) The loading mechanism of the arched supporting structure is analyzed. The arched structure can generate horizontal thrust under the load, reduce lateral pressure acting on the supporting structure. The arched structure bear pressure mostly, it not only give full play to the compression resistance of concrete, but also reduce the moment of supporting piles, lateral displacement of the supporting structure can be controlled within the very fine scope and achieve the desired results.(3) Calculation model of space coordination is established. Considering the interaction of the soil, supporting piles, arched crest beam, we put forward the calculation method about the displacement and internal force of the arched supporting structure. the method is applied in the actual engineering and have good practicality. In the paper, we explore a calculation method for arched shoring with arched crest beam.(4) The result which is calculated by the numerical simulation and the calculated model can reflect the actual state of the displacement and strain very well. Validity of the model that is established by software is verified.(5)The result of the analysis coincides very well with the previous realistic design, which shows that the method is reasonable, effective and practicable, for an on uniformity similar engineering offer understand take on definite use value and theoretical research significance.