强夯垫层法在海港软土路基处理中的应用

Application of dynamic compaction cushion method in soft soil subgrade treatment of harbor

北海某海港区铁路专用线区域范围内存在深厚软土路基需要处理,以此为工程背景,结合现场条件、施工工期、工程造价等综合因素,提出了强夯垫层法处理软基的技术方案。通过现场足尺度软基加固试验,并借助静力触探、标贯试验以及载荷试验3种检测方法,验证强夯垫层法处理软基效果。结果表明:强夯垫层法技术方案可行,并且可处理上覆6 m厚的软土路基,点夯和满夯相结合的强夯垫层法可有效提高软基处理效率。研究成果可为类似软基加固工程提供技术参考。

Taking the deep soft soil subgrade in the railway special line of a port area in Beihai as the engineering background,this paper considers comprehensive factors such as site conditions,construction period,and project cost and puts forward the technical scheme of soft foundation treatment by dynamic compaction cushion method.Through the field full-scale test of soft foundation reinforcement,the paper verifies the effect of the dynamic compaction cushion method on soft foundation treatment by static cone penetration test,standard penetration test,and load test.The results show that the proposed technical scheme of the dynamic compaction cushion method is feasible,and it can deal with the soft soil subgrade with a thickness of 6 m.The dynamic compaction cushion method combining point compaction and full compaction can effectively improve the efficiency of soft foundation treatment.The research results can provide technical references for similar soft foundation reinforcement projects.