摘要
抗拔载体桩通过将纵向钢筋伸入载体内,在抗拔受力时可充分发挥载体的锚固作用,显著提高其抗拔承载力。对抗拔载体桩的抗拔承载机理进行理论分析,并结合一实际工程进行了抗拔载体桩的单桩和群桩抗拔静载试验,研究其单桩受力和群桩受力时单桩的相互影响。研究结果表明,抗拔载体桩单桩承载力较相同尺寸的普通直杆桩有较大提高。对试验结果进行分析,提出了适合抗拔载体桩单桩抗拔承载力的计算公式,并通过对国内多个项目进行比对,验证了其可行性。
By extending the longitudinal steel bar into the bearing sphere,uplift piles with ram-compacted bearing sphere can give full play to the anchoring effect of the bearing sphere when it is under pulling force,and uplift bearing capacity is improved significantly.The uplift bearing mechanism of the uplift piles with ram-compacted bearing sphere was theoretically analyzed,and combined with an actual project,the uplift static load test of the single pile and the group pile of the uplift piles with ram-compacted bearing sphere was carried out to study the interaction between single pile and group pile when they were under the action of forces.The research results show that the single pile bearing capacity of the uplift piles with ram-compacted bearing sphere is much higher than that of the ordinary straight piles of the same size.The test results were analyzed,and a formula for calculating the uplift bearing capacity of the single uplift pile with ram-compacted bearing sphere was proposed,and its feasibility was verified by comparing with multiple domestic projects.
作者
周晓刚
杨启安
ZHOU Xiaogang;YANG Qi′an(China Railway Design Corporation,Tianjin 300308,China;Beijing No.6 Construction Engineering Quality Test Department Co.,Ltd.,Beijing 100076,China)
出处
《建筑结构》
CSCD
北大核心
2021年第6期135-138,134,共5页
Building Structure
关键词
抗拔载体桩
单桩
群桩
抗拔承载力
等效直径
三击贯入度
uplift pile with ram-compacted bearing sphere
single pile
group pile
uplift bearing capacity
equivalent diameter
total penetrations of three drives
