六瓣梅花型混凝土桩截面几何特性研究  

Study on cross-section geometric characteristics of six-petal plum-shaped concrete pile

作　　者：李龙 LI Long(State Key Laboratory of Geomechanics and Geotechnical Engineering Safety,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,Hubei,China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程安全全国重点实验室,湖北武汉430071

出　　处：《工程建设》2025年第4期13-19,共7页Engineering Construction

摘　　要：六瓣梅花型混凝土桩是为满足工程需要研发的一种新型异型桩。为促进六瓣梅花型混凝土桩的推广应用,文章基于桩截面外切圆半径和开弧弧度两个控制变量,对其截面几何特性进行研究。研究表明:1)随着截面外切圆半径和开弧弧度的增大,桩截面面积和截面周长逐渐增大;2)随着截面外切圆半径的增大,周长-面积比逐渐减小,随着开弧弧度的增大,周长-面积比逐渐增大;3)当六瓣梅花型混凝土桩与圆形桩截面面积相等时,开弧弧度在60°~180°范围内,六瓣梅花型混凝土桩截面周长比等截面圆形桩的截面周长大0~10%;4)随着截面外切圆半径的增大,六瓣梅花型混凝土桩主惯性矩逐渐增大,且大于等截面圆形桩的主惯性矩。本文成果可为六瓣梅花型混凝土桩的桩基设计提供参考。The six-petal plum-shaped concrete pile is a new type of special-shaped pile developed to meet the needs of the project.In order to promote the popularization and application of the six-petal plum-shaped concrete pile,the geometric characteristics of the section are studied based on the two key sectional parameters(the outsourcing radius of six-petal plum-shaped concrete pile and the open arc angle of six-petal plum-shaped concrete pile).The results show that:1)the cross-sectional area and the perimeter of the section gradually increase with the increase of the outsourcing radius and the open arc angle of the pile;2)the perimeter-area ratio gradually decreases with the increase of the outsourcing radius of pile,and increases with the increase of the open arc angle of pile;3)when the cross-sectional area of the six-petal plum-shaped concrete pile is equal to that of the circular pile,the cross-sectional perimeter of the six-petal plum-shaped concrete pile is 0~10%larger than that of the circular pile with equal cross-section in the range of 60°~180°;4)the main moment of inertia of the six-petal plum-shaped concrete pile increases with the increase of the the outsourcing radius of pile,and is greater than the main moment of inertia of the circular pile with the same cross section area.The results can provide some references for the design of pile foundations.

关 键 词：地基处理 六瓣梅花型混凝土桩 惯性矩 承载力 几何特性 

分 类 号：TU473[建筑科学—结构工程]