新型狼牙桩竖向承载力特征数值分析  

Numerical Study on the Axial Bearing of New Type of Mace Pile

作　　者：周明中 夏红兵[1] ZHOU Mingzhong;XIA Hongbing(Anhui University of Science and Technology,huainan 230001,China)

机构地区：[1]安徽理工大学建筑与土木工程学院

出　　处：《洛阳理工学院学报（自然科学版）》2019年第3期14-18,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金项目(51774011)

摘　　要：提出了一种新型狼牙棒型桩体,模拟的狼牙桩桩长为21.1 m,直径为800 mm,土层厚度为24.6 m。对新型狼牙棒型混凝土灌注桩的位移、桩侧摩阻力、竖向承载力及桩身荷载传递规律进行了数值模拟分析。分析结果表明:相对于等截面桩,新型狼牙桩的承载力提高了62.5%,狼牙桩达到极限承载力时桩体位移仅为3.42 mm,而此时等直径桩位移为13.93 mm,说明了狼牙桩具有承载力高和沉降量小的优点。狼牙桩在达到极限承载力后,侧向分支分担的荷载总和达到26.7%,说明侧向分支能够有效地分担桩体竖向荷载,提高了狼牙桩的极限承载力。In this paper,a new type of Langya rod pile is proposed,and the displacement,side friction,vertical bearing capacity and load transfer law of the new type of Langya rod concrete cast-in-place pile are simulated and analyzed.The simulated Langya pile is 21.1 m in length,800mm in diameter and 24.6m in soil thickness.The simulation results show that the bearing capacity of the new Langya pile is 62.5%higher than that of the equal section pile,and the top displacement of the pile is only 3.42 mm when the ultimate bearing capacity is reached.The maximum vertical displacement difference between the two piles is 10.44 mm,which shows that the new Langya bar pile has the characteristics of high bearing capacity and small settlement.After reaching the ultimate bearing capacity,the total load shared by lateral braces reaches 26.7%.This shows that the lateral braces can effectively share the vertical load of the pile and improve the overall bearing capacity of the pile.

关 键 词：新型狼牙桩 FLAC3D 沉降 承载力 桩侧摩阻力 

分 类 号：TU473[建筑科学—结构工程]