CFG Pilenet Composite Foundation Study On Working Pattern And Settlement Characteristics Of Soft Highway Pavement Foundations In Binhu District

The construction of the economic zone around the Poyang is the national project.As the soft soil of this area is distributed widely and unevenly,CFG pile in reinforcement of soft soil Foundation is needed.It has a small deformation and the low cost.What's more,it's easy to control post-construction.The promotion of the CFG pile in the soft base treatment of Expressway in Jiangxi province has both the economic and social benefits.However,the working mechanism of composite Foundation of CFG pile-NET is complex,which still needs to be further researched.Firstly,in this paper,it analyzes the mechanism of composite Foundation of CFG pile-NET.Secondly,based on the treatment of Nanchang-Jiujiang road soft soil Foundation in K33+600-K34+500 section,the paper designs the CFG composite Foundation treatment and analyzes the impact on settlement from the perspective of exchange rate.Then,the paper uses the behavior of the finite element simulation to make a analysis of simulation results.Finally,with a view to point out the feasibility of the different ranged length,the paper changes the different parameters based on the preliminary design and simulates the effect of enforcement.Includes:the paper analyzes the working mechanism of the various elements of CFG pile-NET composite Foundation,and clarifies the calculation method of the bearing capacity and settlement.For uniform corrosion of,the ultimate bearing capacity considering the different corrosion depth,different initial are calculated.The results show that: corrosion depth increases,the capacity reduces.Moreover,the regression formula is fitted.the paper designs the CFG pile-NET composite Foundation based on the soft soil Foundation on the Nanchang-Jiujiang road,and analyzes the size effects on bearing capacity and settlement of pile spacing,thus presents the advantages of long Auger bored pile.The paper builds two-dimensional model and simulates the results of preliminary design by using FEM software ABAQUS.From the perspective of the cushion,geogrid,pile length,and spacing,the paper makes a comparative analysis of the impact on the settlement,horizontal displacement and stress of pile.Based on it,the paper improves the preliminary design,and provides the reasonable pile spacing to prove the feasibility of different ranged length.The paper points out that these studies have reference value on the design and construction of CFG pile-NET composite Foundation.The last part of the paper is to conclude according to the above studies,and proposes further problems by focusing on the shortcomings of the paper.