大直径长管节预应力混凝土管桩抗弯性能试验研究  

Experimental study on flexural behavior of prestressed concrete pipe piles with large diameter and long sections

作　　者：刘军[1,2] 刘梅梅 王湛[1,2] LIU Jun;LIU Mei-mei;WANG Zhan(CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou,Guangdong 510230,China;Guangzhou Harbor Engineering Quality Examination Co.,Ltd.,Guangzhou,Guangdong 510230,China)

机构地区：[1]中交四航工程研究院有限公司,广东广州510230 [2]广州港湾工程质量检测有限公司,广东广州510230

出　　处：《中国港湾建设》2018年第11期29-33,共5页China Harbour Engineering

基　　金：广东省交通运输厅科技项目(科技-2016-02-024);广东省交通运输厅科技项目(科技-2016-02-018);广州市科技计划项目(201710010188)

摘　　要：为了深入研究大直径预应力管桩的力学性能,通过室内试验测试准1 400 mm预应力混凝土大直径管桩本身及接头抗弯及开裂性能,了解其承载力、抗弯强度及开裂发展规律,对大直径预应力混凝土管桩是否满足设计要求进行研究,验证其设计合理性和使用安全性。试验结果表明:大直径管桩桩身及管节接头实际抗裂强度均超过设计值,其中接头抗裂强度低于管身,但超出设计值的24%,桩身及管节接头极限抗弯强度超出设计值的11%以上。研究成果可为其推广应用提供理论支撑。In order to deeply study the mechanical properties of large diameter prestressed pipe piles,we tested the flexural strength and cracking behavior of prestressed concrete pipe piles with large diameterΦ1 400 mm and joints of pipe pile to study the law of its bearing capacity,flexural strength and cracking,and estimated whether the prestressed concrete pipe pile with large diameter meets the design requirements.The rationality and safety of pile design can be verified.The test results show that the actual crack resistance of large diameter pipe piles and pipe joints exceeds the design value,and the cracking strength of pipe joint is lower than the pipe body,but exceeds 24%of the design value,the ultimate bending strength of pile body and pipe joint exceeds 11%of the design value.The research results can provide theoretical support for the popularization and application of this pile in future.

关 键 词：大直径 长管节 预应力 管桩 抗弯试验 

分 类 号：U656.114[交通运输工程—港口、海岸及近海工程]