Experimental Study on Wharf yard Foundation Reinforced by Drain Board and Dynamic Consolidation Method

The intelligent reconstruction project of the old wharf yard faces the problems of soil layer uneven horizontal distribution, hard concrete shell layer on the surface and high groundwater level of the site. Improper treatment can easily induce uneven settlement of the foundation, which will affect the normal operation of the intelligent wharf. Based on the actual project, this paper carries out the experimental research on the dynamic consolidation effect of the foundation with or without the drain board, compares and analyzes the monitoring and detection results of the foundation under two working conditions, and gives the calculation formula of the effective consolidation depth. The results show that: the insertion of the drain board can quickly dissipate the excess pore water pressure caused by the dynamic consolidation construction, and effectively shorten the consolidation time of the soft soil foundation; Compared with the area without drain board, the effect of foundation reinforcement is more obvious in the drain board area, In the range of effective reinforcement depth, it is more conducive to improve the mechanical properties of soft clay layer; Groundwater level is an important factor affecting the effective reinforcement depth of dynamic consolidation foundation, in the coastal areas with high water level, reasonable and effective precipitation measures should be considered; The estimation range of effective reinforcement depth correction coefficient is given, which can provide a reference for the design and construction of foundation dynamic consolidation in similar sites.