Study On Experiment Of Super-Wet Soil Subgrade Filler Amelioration In Ya-an Areas

In rainy and moist areas,there is abundant of rain especially in the rainy season and the underground water level is very high. The soil under saturation condition ordinary year forms the super-wet soil which is high water content,soft,big void and low shear intensity. So it must treatment the super-wet soil roadbed in order to insure the strength, stability and the permanence of the roadbed.(1) By sampling on-sit and laboratory experiment, the basic properties of the super-wet soil in Ya'an area are obtained.Based on the water content on-sit, limit water content etc,the super-wet soil is compartmentalized.As well as,the treatment projects which are applicable to the super-wet soil in Ya'an area brought forward;(2) According to the treatment projects,the engineering properties of improving super-wet soil which is intermingled with the lime, cement and NCS soil agent are studies. Through the analysis of the water losing, the maximum dry density and the optimal water content, the reasonable proportion of the improving super-wet soil was determined. Based on this, we studied further on some characteristics of the improved super-wet soil, such as compaction characteristics, liquid limit and plastic limit, water stability, CBR, modulus of resilience, unconfined compressive strength and so on. Furthermore, the relations between the engineering characteristics of the improved super-wet soil and the quantity of the additive are analysised. The meliorated soil's general mechanical properties will provide a technical support for the comprehensive promotion of its application in the highway. Compared to the lime-improved-soil and the cement-improved-soil, the engineering characteristics of the NCS soil agent improved soil is the best one. Then we contrast the calculation results of the different three types to verify the feasibility and reliability of the meliorated road surface structure.(3) In the end, based on the test data above, we used ADINA8.3 finite element analysis software to perform the numerical simulation on the reasonable proportion of the super-wet soil and the improved-super-wet soil. Then we contrast the calculation results of the numerical simulation results and the test results to verify the feasibility and reliability of the meliorated road surface structure.