CFG桩+PHC管桩多桩型复合地基静载试验研究  

Static Load Test of CFG Pile+PHC Pipe Pile Multi-pile Composite Foundation

作　　者：王建宗 Wang Jianzong(Boya(Fujian)Architectural Design Co.Ltd.,Quanzhou,Fujian 362000)

机构地区：[1]博亚(福建)建筑设计有限公司,福建泉州362000

出　　处：《江西建材》2024年第11期229-232,共4页

摘　　要：为提升多桩型复合地基的性能,文中以某高层建筑为例,设计CFG桩+PHC管桩多桩型复合地基方案,并通过静载试验测试分析CFG单桩、复合地基以及加固后补强地基的荷载-沉降曲线。结果表明,CFG单桩沉降量随加载水平的增加而增加;三根CFG单桩极限承载力均超过1240 kN,满足设计要求。复合地基沉降量随施加应力的增加先快速增加后缓慢增加。三组补强后复合地基沉降量分别为12.33、13.86、12.07 mm,补强后的复合地基承载力特征值均满足设计要求,这表明,采用PHC管桩补强后的复合地基取得了良好的加固效果。In order to improve the performance of multi-pile composite foundation,this paper takes a high-rise building as an example to design a CFG pile+PHC pipe pile multi-pile composite foundation scheme,and analyzes the load-settlement curve of CFG single pile,composite foundation and reinforced foundation through static load test.The results show that the settlement of CFG single pile increases with the increase of loading level.The ultimate bearing capacity of the three CFG single piles exceeds 1240 kN,which meets the design requirements.The settlement of composite foundation increases rapidly at first and then slowly with the increase of applied stress.The settlement of the three groups of composite foundation after reinforcement is 12.33、13.86 and 12.07 mm,respectively.The bearing capacity characteristic values of the composite foundation after reinforcement meet the design requirements,indicating that the composite foundation after reinforcement by PHC pipe pile has obtained good reinforcement effect.

关 键 词：地基基础 CFG桩 PHC管桩 静荷载试验 沉降曲线 

分 类 号：TU473.1[建筑科学—结构工程]