大直径钢管桩承载力影响因素及现场试验分析  

Influencing factors and field test of bearing capacity of large diameter steel pipe plies

作　　者：宋超 李志豪 孙益振 白玉新 SONG Chao;LI Zhihao;SUN Yizhen;BAI Yuxin(Yantian East Port International Container Terminals Co.,Ltd.,Shenzhen 518083,China;Dalian University of Technology Modern Engineering Testing Co.,Ltd.,Dalian 116023,China)

机构地区：[1]盐田港东区国际集装箱码头有限公司,广东深圳518083 [2]大连理工现代工程检测有限公司,辽宁大连116023

出　　处：《水运工程》2025年第3期152-157,共6页Port & Waterway Engineering

摘　　要：针对在工程应用中需要有效发挥开口钢管桩承载力的问题,从钢管桩承载力机理出发,结合承载力高应变检测数据,系统分析桩侧桩端土层参数、钢管桩尺寸、入土深度、桩端承载力折减系数对开口钢管桩承载力的影响程度。结果表明,对于端承为主的钢管桩打入桩,应尽量控制终锤时的贯入度,贯入度越小,桩端土塞效应越明显,利用桩端土塞效应可显著提高钢管桩的承载力。但是桩侧桩端土层参数和桩端承载力折减系数在施工因素和时间效应影响下也有可能变小,需要提前预防受个别因素影响而导致承载力的降低。Aiming at the problem that the bearing capacity of open-ended steel pipe piles is needed to enhance effective on site.On the basis of the bearing capacity mechanism of steel pipe piles and the data of high strain dynamic testing,we systematically analyze the impact of various factors on the bearing capacity of open-ended steel pipe piles,such as soil parameters of the pile around and the pile tip,dimensions of the steel pipe pile,depth of penetration,and the reduction coefficient of pile end resistance.The results show that it is essential to control the penetration during the final blows for primarily end-bearing driven pile.A lower penetration leads to a more pronounced effect of plugging,which in turn significantly increases the pile's bearing capacity.Conversely,the soil parameters and the bearing capacity reduction coefficient of the pile side and pile end may become smaller under the influence of construction factors and time effect,there is a need to prevent in advance the impairment of bearing capacity due to individual factors.

关 键 词：钢管桩 承载力 高应变试验 桩端承载力折减系数 

分 类 号：U655.55[交通运输工程—港口、海岸及近海工程]