Research On Mildtype Well Point Dewatering Associate With Heavy Tamping Reinforcing Hydraulic Fill Subgrade

The subgrade reinforcement technology of mildtype well point dewatering associate with heavy tamping has integrated two construction technical characteristics, the heavy tamping consolidation and the well poin dewatering. It makes the soil consolidation mechanism combine effectively by using the methods of heavy tamping consolidation which consolidate the soil through vibration compaction and mildtype well point dewatering which let the underground water level down. It makes use of the advantage of two kinds of consolidation technology, and raise consolidation level efficaciously, but its research and application is in the stage of juvenility. It Lacks systematic and widely research.Based on the engineering of mildtype well point dewatering associate with heavy tamping reinforcing hydraulic fill subgrade at DaTang power station on the harbor of DongYing, going deep into the design method and construction technique of treating soil by heavy tamping consolidation method and the calculative method and engineering application technique of treating soil by mildtype well point dewatering consolidation method; Through the analyse to spot monitoring data of the experiment about mildtype well point dewatering associate with heavy tamping reinforcing hydraulic fill subgrade, do research on the change law of the underground water level and excessive pore pressures and the settlement of groundsill through the whole consolidating process, validate the superiority of this kind of consolidation technology and provide instruct for other engineering construction. By laboratory test, it has been analyzed by contrast that the mechanics character on the foundation soil before and after the mildtype well point dewatering associate with heavy tamping consolidation technology treatment, the feasibility and validity of this kind of consolidation technology has been validated meanwhile. Aim at the influence of energy and time of heavy tamping and the stress circumstance of soil to effect of heavy tamping, carrying though simulateing the process of impact with the TESTSTAR, optimizing the parameter of heavy tamping construction according as the experiment analyse.