Study On Indoor Model Test Of Soft Soil Foundation With Low Embankment Under Traffic Load

With the rapid development of transportation in China,more and more high-grade highways are being constructed in the soft clay area.Especially for the highway on soft foundation of low embankment,as the height of embankment fill is decreased,the practical engineering problem that transportation load is not fully spread in embankment is transferred to soft soil foundation.Based on the traffic load simulation,the indoor test model of soft soil subgrade is designed and made,and the influence of traffic load on the dynamic response and settlement analysis of soft clay foundation under low embankment is studied.Through the analysis of the test results,some rules are summarized,which have important practical significance in the construction of low embankment high grade highway in soft clay area in the future.The main contents of the paper are as follows:1.Reading and collecting a large of literature,this provides the necessary theoretical basis and reference value for the design of test plan,which includes the dynamic response of embankment and subgrade,the settlement deformation and the traffic load model test;2.Carried out the theoretical study of traffic load,through the analysis of traffic load characteristics and simplified methods,proposed the traffic load description method in this experiment;The effect of traffic load on soft clay foundation of low embankment is further studied;3.The preparation work of indoor model test is carried out,including material preparation,instrument debugging,test loading scheme design and so on.4.According to the test results,a simple analysis of the changes of the soft clay foundation under static load settlement and pore pressure,focus on the low embankment of soft soil under traffic load in single point excitation at different frequency and different intensity and different time and double point vibration when considering the load between the superimposed effect of influence on settlement and soil pressure,pore pressure and acceleration etc.,and some rules are summarized,which can provide reference basis for the construction of low embankment high grade highway in soft clay area in the future.