Study On Horizontal Bearing Performance Of Pilegroup Underalluvial Plain Silt Ground Condition

This paper takes the silty soil of the dongming Yellow River Highway Bridge at the boundary of heze of Shandong Province and xinxiang of Henan Province as the foundation,and compares the horizontal stress performance of the group of piles under the condition of silt ground through indoor model test and numerical simulation.The main research contents and research results of this paper are as follows:1.Retrieve the box placed in model test test soil,water,and complete the weight of consolidation under the condition of drainage by pore water pressure gauge measured the relationship between the change of pore water pressure with time and the time needed to complete the consolidation.Test results show that the test of foundation soil pore water pressure at the time of day 20 stability to a certain value,the complete weight of saturated consolidation of foundation soil,in 20 days before pile horizontal static load model experiment was carried out.2.Details of the design process model test,including the design of test materials,the test data of measurement method and the way of loading,then began experimenting with model test is prepared to do to record data and real-time.3.By processing the indoor model test of measurement data,research and analysis of powder soil foundation under the group of pile soil resistance and horizontal displacement of pile and pile bending moment distribution.Pile bending moment distribution along the pile depth direction is nonlinear.Bending moment value with the increase of pile embedment depth,first increases then decreases;Under the same load,with the increase of buried depth and the displacement value decreases;The same embedment depth affecting resistance increases with the increase of the load level and,soil resistance appears the seventh largest load.4.Using the finite element software ABAQUS,the establishment of numerical model,the powder soil foundation under horizontal by Dutch group of horizontal displacement and bending moment of piles and pile lateral soil resistance,and through comparing with the results of the analysis with indoormodel,analyze the differences and similarities between them.And summed up the corresponding laws.Through the further research on horizontal bearing behavior of pile group under the condition of silt ground of Yellow River alluvial plain,it provides certain reference for the design of pile foundation under silt foundation of Yellow River alluvial plain.It is of great social and economic importance to reduce the early disease problems of bridges in the area,improve the quality of the use of bridges or water conservancy facilities,prolong service life,reduce engineering construction and maintenance costs,and save environmental resources.