The Application Of Research High Vacuum Dewatering Dynamic Compaction Method In Railway Subgrade Engineering

High Vacuum Dewatering Dynamic Compaction Technology combines dynamic compaction and mechanical precipitation, the characteristics of two kinds of construction technology is a new joint reinforcement technique. At present, the technology of the joint is also a lack of systematic study, the reinforcement mechanism and consolidation theory explanation is not mature enough, everything is still in exploring stage. Nevertheless, in practical engineering, when the design and construction is still in the stage of experiment, it play an important role in the development and application of further promote this construction technology which would discussed and obtain the results in practical engineering and application in practical engineering.Combined with soft clay foundation yellow Handan railway IV section dealing with the practical engineering. Discussing and researching the mechanical strong compaction technique and mechanism by the theory study, numerical simulation and field test. Main job:(1) High Vacuum Dynamic Compaction Method is the vacuum precipitation precipitation and the organic combination of two kinds of dynamic consolidation process and become a new method of compound, through the analysis of the vacuum precipitation mechanism and the mechanism of dynamic compaction method to reinforce foundation consolidation of foundation, analysis of high vacuum precipitation mechanism of dynamic compaction method to reinforce foundation.(2) the high vacuum dynamic compaction method is mainly suitable for rainfall and high saturated soft clay soil, the application needs to reasonably selected according to different site construction parameters "for soft clay, high vacuum dewatering dynamic compaction parameters selection is reasonable, is the key factor that influence the engineering application of the technology. In this paper, the dynamic compaction parameters selecting high vacuum precipitation has carried on the detailed research, including the reinforced depth of dynamic compaction, including the layout of well point precipitation, reinforced depth of dynamic compaction, click the tamping energy, tamping, the layout of tamping points and number of vacuum dewatering system layout.(3) Combined with Ⅳ of huang railway the high vacuum dewatering dynamic compaction treatment of soft soil foundation engineering background, analyzing the characteristics of the vacuum dewatering dynamic compaction construction technology, construction methods, including construction machinery, construction machinery parameters, construction quality control, construction process often encounter problems, and proposes the measures for the construction process often appear problem.