海工重载场地软土地基加固设计与现场试验

Field test of reinforcement design scheme for soft soil foundation in marine engineering heavy load site

依托中海油珠海深水海洋工程装备制造基地中海工模块总装场地地基处理项目,根据重型荷载以及软土层上部覆盖层起伏较大的地质特点,分区域设计了强夯置换法、动力固结排水法的地基加固方案。通过现场试验及检测,分析比对各试验区夯沉量、超孔隙水压力以及土地强度等,得到不同加固方案下超孔隙水压的消散速度以及土体加固效果,验证了夯击能、间隔时间等设计参数,为大范围地基处理提供了依据,同时也对动力固结法在软土地基处理的推广应用具有借鉴作用。

Based on the ground treatment project of Zhuhai Offshore Engineering Building Base of China National Offshore Oil Corp marine engineering module final assembly site,and according to the engineering characteristics of heavy load and geologic condition of great fluctuation of the upper overburden,we design the soil consolidation schemes by dynamic replacement method and dynamic consolidation drainage method respectively in subregional ground,compare the ramming volume,excess pore water pressure and ground strength,obtain the dissipation rate of the excess pore water pressure and soil consolidation effect of different consolidation schemes,and verify the design parameters such as the ramming energy and interval time,so as to provide a basis for the large-area ground treatment and serve as reference for the popularization of the dynamic consolidation method in the soft soil foundation treatment.