预应力管桩高应变检测承载力随休止期的变化  

Study on Change High Strain Detection Bearing Capacity of Prestressed Pipe Piles with Rest Period

作　　者：王鹏 张毅 WANG Peng;ZHANG Yi(Guangdong Provincial Freeway Co.,Ltd.,Guangzhou Guangdong 510623,China;Guangdong Quanke Engineering Inspection Co.,Ltd.,Guangzhou Guangdong 511400,China)

机构地区：[1]广东省高速公路有限公司,广东广州510623 [2]广东全科工程检测有限公司,广东广州511400

出　　处：《广东公路交通》2023年第5期44-47,共4页Guangdong Highway Communications

摘　　要：高应变法是一种对单桩竖向抗压承载力和桩身完整性进行判定的检测方法。灌注桩的高应变检测,被检桩的混凝土龄期应达到28d或强度达到设计要求,而管桩也应满足不同土层对应的休止时间的要求。分析了预制管桩不同休止时间的承载力变化,在承载力-时间曲线中寻找规律,以满足部分特殊施工工艺的工期要求,为设计及施工提供相关依据。s:High strain detection is a detection method to determine the vertical compressive bearing capacity and pile integrity of a single pile.For the high strain detection of the cast-in-place pile,the concrete age of the inspected pile should reach 28d or the strength should meet the design requirements and the pipe pile should also meet the corresponding rest time requirements of different soil layers.In this paper,the change of the bearing capacity of the prefabricated pipe pile at different rest timehas beenanalyzed,the growth law in the change curve of the bearing capacityhas beensearched,so as to meet the construction period requirements of some special construction processes and to provide a basis for the design and construction.

关 键 词：高应变 预应力管桩 承载力 变化曲线 

分 类 号：U443.159[建筑科学—桥梁与隧道工程]