Compaction Characteristics Of High Liquid Limit Clay And Strong Vibration Rolling Technology

Filling soil is used widely in filling the subgrade. After compaction of the filling soil, itssettlement is reduced, drainage performance is weakened, and shear strengthincreases.Filling quality has a direct impact on the foundation and roadbed, it sometimes canlead to the deformation, sedimentation and destruction of the superstructure. Therefore,compaction of subgrade is an essential one of roadbed construction process, and also afundamental technical measures to improve the subgrade strength and stability.For the high liquid limit clay on construction site, when using direct filling constructiontechnology, its water content is too high to cut down. In this case, using the ordinary rollerfail to meet the compaction standard. With the development of science and technology,more compaction equipment are brought in. The compacted thickness of roller inspecification can not meet the development needs, these issues are involved in this paper.In this paper，the compaction causes, influencing factors and mechanism of the wereanalyzed and researched based on the study of compaction degree at home and abroad.According to the sugared compaction test of Gillian expressway in Jiangxi province, wetested the main physical properties of soil, and then analyzed the relation betweencompactness and compacting technological parameters. A test was carried out to compare thecompaction effect of maximum rated force roller with that of general roller, and the rationalcompacted thickness of the two rollers was found out. It not only can ensure the compactionquality, but also can reduce the erection time and speed up construction progress. It issignificant for the sugared compaction.