Study On The Evaluation Index Of Roadbed Compaction Quality

Compaction is very important to the process of road construction, compacted materials tend to be the best density to ensure subgrade pavement bearing capacity, stability and strength. In the construction process of medium pressure real deficiency can cause roadbed filler, rutting, cracking, etc.; Overpressure real causes damage to be compacted material properties. In order to ensure the quality of subgrade pavement have good compaction, we must strictly control the compaction quality in the construction, and need to choose suitable compaction quality evaluation indexes and testing methods for quality control of compaction sections. This article sums up some compaction quality physical evaluation index——degree of compaction, porosity, air volume rate, relative density, etc; the compaction quality of mechanical evaluation index—— dynamic modulus of deformation, plastic deformation incremental, foundation coefficient, bearing ratio, etc; analyzed correlation of the compaction quality evaluation index between physical evaluation index, the correlation of the compaction quality correlation index between mechanical evaluation index, and correlation of compaction quality evaluation index of physics and mechanics. Through the analysis can be seen that there is a certain correlation between the compaction quality evaluation index, therefore, in the implementation of work pressure, should be based on the compaction characteristics of the material, construction conditions to choose the reasonable compaction quality evaluation indexes and test methods to improve the construction efficiency.Some traditional detection methods are introduced for compaction degree evaluation index, aimed at the limitations of these traditional test methods mainly illustrates the advantages of intelligent compaction test and each manufacture and unit commonly used intelligent compaction test index.In view of the laboratory grading low-rising and high soil compaction test puts forward the compaction degree and cumulative settlement dual index control gradation of soil compaction quality. By analyzing the acquisition of different depth of soil under different compaction times pressure signal puts forward earth pressure can be used as a kind of compaction quality evaluation index, and provides a new detection means for vibration monitoring the status of the wheel and the density of compacted material evaluation.