新型叶片式螺旋钢管桩极限承载性能研究  

Study on ultimate bearing capacity of new type of blade-type spiral steel pipe pile

作　　者：朱彦鹏[1,2] 张辉 王雪浪[3] 朱嘉辉 黄安平 张兴旺 王澳 ZHU Yanpeng;ZHANG Hui;WANG Xuelang;ZHU Jiahui;HAUNG Anping;ZHANG Xingwang;WANG Ao(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;School of Architecture and Art Design,Lanzhou University of Technology,Lanzhou 730050,Gansu,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]兰州理工大学建筑与设计艺术学院,甘肃兰州730050

出　　处：《建筑科学与工程学报》2025年第2期180-189,共10页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(51978321);教育部长江学者和创新团队支持计划项目(IRT_17R51)。

摘　　要：针对传统叶片式螺旋钢管桩在承载力方面的局限性,通过改良其几何结构,提出了一种叶片直径递变的新型叶片式螺旋钢管桩以提升其极限承载力。进行了6组抗压试验和6组抗拔试验,每组抗压试验包含1根桩,每组抗拔试验包含2根桩,以研究叶片间距和叶片直径递变对螺旋钢管桩承载力的影响;利用ABAQUS数值模拟软件建立模型,并与实测数据进行对比,以验证模型的精确性和准确性。通过对比现场试验结果与数值模拟结果,分析改良后的新型叶片式螺旋钢管桩在极限承载力方面的提升效果。结果表明:叶片参数的改变对螺旋钢管桩的承载力具有显著影响,叶片直径的递变与螺旋钢管桩的极限承载力呈正相关关系,即叶片直径的适当增加能够显著提升桩的承载力;叶片间距决定着螺旋钢管桩的承载模式,叶片间距改变同样会对桩的极限承载力产生影响;在用钢量相同的情况下,新型叶片式螺旋钢管桩的抗压承载力相比传统螺旋钢管桩提升了约28%,抗拔承载力提升了约13%;验证了ABAQUS数值模拟软件在新型叶片式螺旋钢管桩承载力分析中的可行性,也进一步证明了该桩型在村镇住宅承载力不均匀地基中应用的可靠性。In view of the limitations of traditional blade-type spiral steel pipe piles in terms of bearing capacity,a new type of blade-type spiral steel pipe pile with gradually changing blade diameter was proposed by improving its geometric structure to enhance its ultimate bearing capacity.Six sets of compressive tests and six sets of tensile tests were conducted,with one pile in each set of compressive tests and two piles in each set of tensile tests,to study the influence of blade spacing and blade diameter variation on the bearing capacity of spiral steel pipe piles.A model was established by using numerical simulation software ABAQUS and compared with measured data to verify the accuracy and precision of the model.By comparing on-site test results with numerical simulation results,the improvement effect of the new blade-type spiral steel pipe pile on the ultimate bearing capacity was analyzed.The results show that the change of blade parameters has a significant impact on the bearing capacity of spiral steel pipe piles.The gradual variation of blade diameter is positively correlated with the ultimate bearing capacity of spiral steel pipe piles,that is,an appropriate increase in blade diameter can significantly improve the bearing capacity of piles.The blade spacing determines the bearing mode of spiral steel pipe piles,and any changes in it will also affect the ultimate bearing capacity of the piles.Under the same amount of steel used,compared with traditional spiral steel pipe piles,the compressive bearing capacity of the new blade-type spiral steel pipe pile is increased by about 28%,and the tensile bearing capacity is increased by about 13%.The feasibility of using ABAQUS numerical simulation software in the analysis of the bearing capacity of the new type of blade-type spiral steel pipe pile is verified,and the reliability of this pile type in the uneven bearing capacity foundation of rural residential buildings is further demonstrated.

关 键 词：新型叶片式螺旋钢管桩 极限承载力 现场试验 数值模拟 叶片参数 

分 类 号：TU473[建筑科学—结构工程]