Research On The Mechanism Of Pile-soil Interaction Cased On The Coal Transfer-Terminal Project In Dushan,Jiaxing

Since the reform and opening up,along with the continuous deepening of foreign trade,China’s economy has developed rapidly.The development of the port and dock transportation industry has played a major role in this.Due to the increase of population and the increase of trade volume,higher requirements are placed on the foundation bearing capacity of the wharf,and the bearing capacity is mainly achieved by the force between the pile and soil of the foundation.Based on this,the study of pile-soil interaction in foundations is particularly important.Although some achievements have been made in pile foundation theory in recent years,it is difficult to study its deformation and stress distribution status because large deformation and stress are affected by factors such as the type,arrangement method,quantity,and construction method of the pile foundation.However,studying stress and deformation through numerical simulation can make the result closer to the actual project,so it can solve many problems in engineering.This paper first simulates a simple example model and compares the arrangement of piles to obtain a more suitable combination of pile foundations,in a combination of as many as possible,length as long as possible,and distance as close as possible,and apply to the following project examples.Then the theory of pile-soil interaction is introduced.Combined with the Dushan Coal Transshipment Terminal Project in Jiaxing,the ABAQUS finite element software is used to simulate the stress and strain of the pile-soil interaction.The stress and strain of the soil and pile before and after the pile was piled under the 8m loading condition were studied firstly by two-dimensional model,and the stress and displacement of the soil before and after the PTC pile were compared.It is initially concluded that the PTC pile has certain restrictions on the stress and displacement of the soil,so as to ensure the stability of the soil.The three-dimensional model was then simulated separately without PTC piles under A and B soil conditions(different soil parameters),and the monitoring points under different pile loads(2m,4m,6m,8m,10 m,and 12m)were studied to analys horizontal displacement,settlement and overall soil displacement.Afterwards,the three-dimensional model was simulated separately for PTC piles in the two soil conditions A and B(different soil parameters),and the monitoring point levels under different loading conditions(2m,4m,6m,8m,10 m,and 12m)were studied to analys displacement,settlement and overall displacement of the soil.By comparing the changes of settlement and deformation at the monitoring points before and after pile-up,it can be seen that PTC piles have a restraining effect on the settlement and deformation of the soil.It is further concluded that the PTC pile has a certain constraint effect on the strain deformation of the soil and maintains the soil.The stability has a certain positive effect.The complex problem of pile-soil interaction is affected by many factors,and we mainly discuss and analyze it in terms of stress and strain.Through comparison before and after pile-up,two-dimensional and three-dimensional comparisons,and comparisons of different loads,the interaction of piles and soils is understood as much as possible.It is hoped that this can provide reference for similar engineering problems,and on this basis,further studies will be made.