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先张法预应力离心混凝土椭圆形啮合管桩的构建和试验

作者：陈敏芬1，毛江才2，洪荣华3，洪泽斌3

关键字：先张,法,预应力,离心,混凝土,椭圆形,啮合,

　
（1.杭州市水利水电工程质量安全管理服务中心，浙江 杭州  310005；
2.杭州市建设工程质量安全监督总站，浙江 杭州  310005；
3.杭州迪莹科技有限公司，浙江 杭州  310021）
    摘要：创新研发了一种先张法预应力离心混凝土椭圆形啮合管桩，进行了与先张法预应力混凝土圆形管桩的对比研究，建立了先张法预应力离心混凝土椭圆形管桩的数值模型，并通过了单桩试验验证。结果表明，先张法预应力离心混凝土椭圆形啮合管桩的抗弯、抗剪性能较先张法预应力混凝土圆形管桩提高了26%，在变形延性方面，较大幅度减小了管桩在剪力作用下的变形量，并且随着管径增大，受力条件更好。
    关键词：预应力混凝土管桩；椭圆形；啮合；试验
    中图分类号：TU473        文献标识码：A        文章编号：1001-702X（2022）05-0080-04
 
Construction and test of pretensioned prestressed centrifugal concrete elliptical meshing pipe pile
CHEN Minfen1，MAO Jiangcai2，HONG Ronghua3，HONG Zebin3
（1.Hangzhou Water Conservancy and Hydropower Project Quality and Safety Management Service Center，Hangzhou 310005，China；
2.Hangzhou Construction Project Quality and Safety Supervision Station，Hangzhou 310005，China；
3.Hangzhou DIYing Technology Co. Ltd.，Hangzhou 310021，China）
    Abstract：A pretensioned prestressed centrifugal concrete elliptical meshing pipe pile is innovatively developed， and a comparative study with pretensioned prestressed concrete circular pipe pile is carried out. A numerical model of pretensioned prestressed centrifugal concrete elliptical pipe pile is established for theoretical calculation，which is verified by single pile test. The bending and shear resistance of pretensioned prestressed centrifugal concrete elliptical meshing pipe pile is greatly improved by 26% compared with pretensioned prestressed concrete circular pipe pile. In terms of deformation ductility，the deformation of pipe pile under shear is greatly reduced，and the stress conditions are better with the increase of pipe diameter.
    Key words：prestressed concrete pipe pile，ellipse，mesh，test