利比亚Sidi Alsaeh地区风积砂土地基处理

利比亚Sidi Alsaeh地区大面积风积砂丘地基的场地条件、地基状况、强夯加固、效果检验等方面的研究和工程实践表明,在大面积风积砂丘地基采用强夯加固处理是可行的;由于场地平整后的地基承载力差异较大,为满足承载力、沉降控制及地基均匀性要求,采用统一的高夯击能和夯击次数效果不显著,对不同工况地基宜选用不同的强夯处理参数;SidiAlsaeh地区风积砂场地地基承载力与标准贯入击数之间符合趋势性统计关系,缺乏严格对应关系,效果检验应选用标准贯入试验与静载试验对照进行。

Dynamic Compaction Practice for Aeolian Sand Ground Treatment at Sidi Alsaeh Regional, Libya

Site and foundation conditions,dynamic compaction treatment methods,and effect inspissations had been studied for Aeolian sand ground treatment at Sidi Alsaech region in Libya.The research and its engineering implement indicate that the dynamic compaction method is feasible for ground treatment at large-scale Aeolian sand dune areas,the bearing capacities of natural sub ground at cut areas and fill areas are different clearly,and different compaction dynamic measures and parameters should be applied,for fine sand is greater than 90% and the coefficient uniformityCu is small,low-layer’s soil water content w≤1%~5%at Sidi Alsaeh’s Aeolian sand ground,appropriate compaction energy should be used to meet the requirements of bear capacity,settlement,and uniformity,and excessive compaction energy and tamp times will not improve the bearing capacity,between SPT value and static loading test,no strict and monotone relationship exists,but trend relationship exists.The larger SPT value is,the denser Aeolian sand is,and so the higher the bearing capacity is.The contrast of SPT and static loading test should be adopted and contrasted for the treatment effect inspissations.