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堆载预压是软土地基常用的处理方法,砂石桩和塑料排水板可以加快超孔压的消散,对软基加固有利。采用数值模拟方法,对上海梅山钢铁公司江边码头料场在堆载过程中土体变形和孔压分布规律进行数值仿真,模拟结果表明,砂石桩的施工有利于超孔隙水压力的消散,料场的沉降值在每次加料期间变化明显,且随着堆料堆高的增加而明显增大;每级荷载初期完成的变形量基本达到本级稳定状态下的变形总量的70%以上,后期变形较缓慢,逐步收敛呈稳定状态,在满足最终堆矿荷载要求的情况下,也保证了正常运行。
Preloading pile is commonly used in soft soil treatment, sand pile and plastic drainage board can speed up the dissipation of excess pore pressure, the soft foundation reinforcement. Numerical simulations were carried out to simulate the soil deformation and pore pressure distribution during the loading process of the waterfront of the Shanghai Meishan Iron and Steel Company. The simulation results show that the construction of the sand pile facilitates the dissipation of excess pore water pressure, The sedimentation value of the stockyard changed obviously during each feeding period and obviously increased with the increase of the stockpile height. The deformation amount completed at the initial stage of each stage basically reached more than 70% of the total deformation at this stage of steady state , The late deformation is slow, and gradually converge to a steady state, in the event of meeting the final pile load requirements, but also ensure the normal operation.