混凝土变径桩工作性状研究  

Study on Behaviors of Concrete Variable Section Piles

作　　者：刘国超[1] 闫洪涛[1] 胡博[1] 

机构地区：[1]天津市勘察院,天津300222

出　　处：《天津科技》2015年第7期37-39,共3页Tianjin Science & Technology

摘　　要：通过数值模拟及现场试验的方法对变径桩的工作性状进行分析研究,比较变径桩PHB与等直径管桩的桩身轴力、抗压承载力及抗拔承载力,分析得出结论,变径节桩的单桩承载力小于同节径相等的等直径管桩,大于同直径的预应力管桩。PHB桩可在复合地基及抗拔桩中单独使用,可减少挤土效应,具有一定的技术经济效益(可节省混凝土材料约18%,,减少挤土体积12%,左右)。By means of numerical simulation and field test,work characters of variable section piles were analyzed to compareaxial force,compression strength and anti-pulling capacity between variable diameter pile PHB and unidiameter piles.A conclusion was made that single pile bearing capacity of a variable section pile is less than that of a unidiameter pile withthe same pitch diameter,and greater than that of a prestressed pipe with the same diameter. PHB pile can be used independentlyin composite foundation and uplift piles and is able to reduce the squeezing soil effect. It has certain technical and economicbenefits,saving about 18%, concrete materials and reducing 12%, squeezing soil volume.

关 键 词：数值模拟 变径桩 PHB 抗压承载力 

分 类 号：TU473.16[建筑科学—结构工程]