Study On Technique Of Using Dynamic Compction And Impact Roller Compaction Method To Reinforce Flood Area Ground

Coastal flood area foundation is a kind of deficient consolidation poor foundation. The foundation uniform settlement of the highway built in the flood area induced subgrade deformation, resulting in pavement cracking, jack pulp disease frequent, severe Bump. Recently, the DJM, dynamic compaction, impact roller compaction, dewatering and other foundation reinforcement were used in the ground treatment of flood area, which achieved certain results. But the applicable conditions and the advantages or disadvantages of the methods are not the same because of the various strengthening mechanism.Based on the Binzhou-Dezhou freeway construction engineering, This paper determined the treatment plan of the disposal of bridge foundation with dynamic compaction as well as the disposal of general sections with impact rolling tecnology through on-site investigation, foundation settlement calculation. According to the analysis of monitoring data in field test section, the paper studied the changing laws of water level and excess pore water pressure before reinforcement,in reinforcement process and after reinforcement, verified the the feasibility and effectiveness of reinforcement technology through the research to the test results of compaction, water content, standard penetration test and other indicators, obtained the process parameters to guide the construction and proposed the construction control indicators. The research results provide evidence for the corresponding theory research and calculation analysis.Through the on-site construction condition analysis of the contract sections, the paper proposed the construction quality guideline principle and control method of dynamic compaction and the impact rolling consolidation technology, and accumulated engineering experience for the future promotion.