Study On The High-filling’s Influence On The Pile Frame Structure Embankment On The Soft Soil

In recent years,gradually appeared around the new embankment pile foundation frame structure,with the development of reclamation engineering to the middle and lower tidal flats.In coastal soft soil foundation,the stress and deformation of the frame structure of the embankment must be greatly influenced by the high-filling.This paper relying on the water conservancy science and technology project of Zhejiang Province-Technical research on the embankment of the frame structure of pile foundation under soft soil foundation,with two seawall projects in Wenzhou city,evaluated the influence of high fill on the stress and deformation of the frame structure of the pile foundation under the soft soil foundation,by using in situ observation and finite element software simulation analysis.And Proposed projects optimization scheme.The main research work and research results of this paper include the following aspects:(1)Analysis of in situ observation data and finite element calculation results,get the embankment fillings of seawall pile frame structure of soft soil under the condition of deformation.Comparing with the results of in situ observation and finite element analysis,obtained that Midas/GTS is good for simulation analysis for seawall pile frame structure under the condition of soft soil,and has a high credibility.(2)The finite element model is established to analyze the settlement and horizontal displacement of the frame structure of the pile foundation under different heights of soil,obtained influence of different filling height on the frame structure of pile foundation-Along with the increase of the height of the soil,the differential settlement of the embankment increases,and the horizontal displacement of the outward sea side increased rapidly,and adversed to the security and stability of the project.The increase of soil height has little influence on the stress condition of the pile foundation frame structure,and the pile foundation frame structure is not easy to damage.(3)Analysis of deformation and stress characteristics of the frame structure of the embankment,under the treatment of sheet pile and anti slide pile and pile foundation.The engineering effect of three kinds of foundation treatment methods is obtained,and concluded that the method of mixing pile is the most reasonable one after the economic comparison.(4)Analysis of the engineering effect of the curtain pile,concluded that the curtain pile can reduce the horizontal displacement of the frame structure.Analysis of the deformation of the frame structure of the pile foundation under different length of pile foundation,obtained the engineering effect of pile foundation with long and short piles,and the settlement of pile foundation with long and short piles to improve the differential settlement of piles.Analysis of the projects effect of different pile length and pile spacing condition,obtained the the best pile length and the spacing between mixing piles.