Research on Engineering Characteristics and Foundation Compaction Methods of Hainan Coastal Fine Sand
The engineering characteristics of coastal sand foundation are significantly different from those of conven-tional land-based sand foundation.Improper treatment can cause engineering problems of settlement deformation and vibration liquefaction.Based on Hainan coastal fine sand,the performance and environmental geological condi-tions of coastal sand foundation was thought over.Firstly,the engineering characteristic was analyzed;Then,on-site compaction test research on coastal sand foundation were studied by two compaction methods of impact roller+vibration roller and vibration roller.The single pass compact,single settlement difference,the total compact and the settlement difference are compared and analyzed.The results indicate that it is advisable to set up a gravel soil cush-ion layer at the base of coastal sand with 30 cm thichness;The impact of using a single vibrating roller to compact the coastal sand cushion layer on the compaction degree of the coastal sand foundation is limited.It is advisable to apply a combination of impact compaction and vibration compaction on the cushion layer,with rolling parameters of 15 times of impact rolling and 4 times of vibrating rolling;The control standard for compaction settlement difference is that the average compaction settlement difference of the last two times should not exceed 2 mm.
万方数据
维普
