The Comparative Analysis Of Compactive Technique And Traditional Compact Technique In Subgradecompact Of The Highway Construction

The compact principle and construction technique of the traditional method for the subgradecompact, such as machine grinding method and tamping method, are summarized in the paper, as well as the advantage and disadvantage of the method. On the base of the above summary, Shi-Huang highway is taken as an example to research the way to deal with the subgrandecompat by amounts of experiments on site and on laboratory, which are classified by machine grinding method, tamping method and impact method. The research work consists of the compact principal, construction process, construction quality control, the compact times and the compact degree, as well as the effect depth of compact, the degree of consolidation and the microstructure relationship between the settlement and the soil. Considering the special property of soil original compact, the consolidation theory of the sand well is used to analysis the relationship between the consolidation and the settlement for the compact subgrade, which is compared with the test records. Furthermore, the comparative analysis for the three subgrade reinforced method is made from the angles of compact principals, compact effects, economic benefit and technique feasibility, etc, the results of which show that modified 1-D consolidation-settlement principal and sand-well consolidation theory can be put into the settlement analysis of compact subgrade. The subgradecompact method, which is the perfect combination of machine grinding method and tamping method, is suitable to deal with the highway subgrade and worthwhile being extending widely for its great usage foreground in highway construction.