压实度（Degree of compaction）.docVIP

压实度（Degree of compaction） Abstract: in highway engineering construction, the subgrade compactness is an index that must be strictly controlled, and the compaction degree can not meet the requirements, which directly leads to the shortened life of subgrade. If the skin is not stored, the hair will be attached to it. The damage of the subgrade is an important reason for the large area damage of the road and the reconstruction project. Key words: subgrade; construction; degree of compaction; problems; Countermeasures Introduction Since the end of 1990s, Anhui province highway construction has entered a stage of rapid development, after ten years of hard work of the provinces highway, expressway and national and provincial trunk basically formed a three-dimensional cross traffic network. Highway pavement from the beginning of the gravel road gradually developed into asphalt penetration type, asphalt table, and then developed into the present cement concrete, asphalt concrete pavement, road conditions in the improvement, driving comfort is improving. But at the same time there is a problem has been puzzling our engineering and technical personnel, is that although the design standard and project cost increased year by year, but the service life of the road but most are not up to standard requirements, and even some highway built just began a large area of damage, resulting in a huge waste of construction funds. There are many reasons for this situation, but in the final analysis, there are no more than two reasons: the external cause is overloading and overloading, and the heavy increase of vehicles causes the highway to be overburdened; the internal cause is the quality of the project. In this external cause, I will not go into details, and the most internal problem is the construction quality of subgrade. In recent years, the engineers and technicians and researchers countless lessons and research exploration, gradually formed a new construction concept: highway struct