高能级强夯加固大面积深厚回填场地试验研究  

EXPERIMENTAL STUDY ON THE REINFORCEMENT OF LARGE DEEP BACKFILLED SITES BY HIGH ENERGY LEVEL DYNAMIC COMPACTION

作　　者：章洪波 李旭平 ZHANG Hongbo;LI Xuping(CNPC Guangxi Petrochemical Co.,Ltd.,Nanning 53000,China;Guangdong Tianli Geotechnical Group Co.,Ltd.,Guangdong Zhuhai 519090,China)

机构地区：[1]中国石油广西石化公司,南宁530000 [2]广东天力岩土集团有限公司,广东珠海519090

出　　处：《低温建筑技术》2024年第8期105-110,共6页Low Temperature Architecture Technology

摘　　要：为研究高能级强夯对深厚复杂回填场地的有效加固深度及加固效果,及地下水位对加固效果的影响,结合广西某大面积回填场地最大能级为15000kN·m的高能级强夯处理工程,对不同能级的高能级强夯分别设置了试验区,根据载荷试验、标准贯入试验、重型动力触探试验、瞬态瑞利波试验、密实度试验、室内土工试验等方法分析了加固效果。研究结果表明,地下水位和孔隙水压力对加固效果影响较大,水位较高且施工过程中孔隙水压力较高的区域加固后的地基承载力或变形模量较低,在后续正式施工及类似场地施工时可采取夯坑回填碎石、增加施工间歇天数或强夯与降排水相结合的工艺。研究可为高能级强夯加固大面积回填场地施工提供参考和借鉴。Testing areas are set up for different energy levels of a high energy level dynamic compacting treatment project,in which we carry out loading tests,standard penetration tests,heavy dynamic penetration tests,transient Rayleigh wave tests,compactness tests,and geotechnical tests.The effective depth of reinforcement by high energy level dynamic compacting in this project is basically in line with the recommended values of the specification.Groundwater level and pore water pressure have a greater impact on the effectiveness of reinforcement.Basically,the foundation bearing capacity and deformation modulus will be lower when the water level and pore water pressure is higher in the construction process.In the construction of similar sites,the process of backfilling the ramming pit with gravel,increasing the number of construction intervals,and combining ramming with drainage reduction should be used.The study may provide the reference for the construction of large backfilled sites reinforced by high energy lev⁃el dynamic compacting.

关 键 词：高能级强夯 回填场地 加固效果 原位测试 土工试验 

分 类 号：TU431[建筑科学—岩土工程]