高应变法检测预应力管桩接口探讨
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摘要
由于施工人员没有按有关规范要求施工,预应力管桩锤击法沉桩过程中接口经常出现质量问题,导致接口处出现断桩情况,高应变法检测此类缺陷有明显优势。预应力管桩接口处断桩虽然不影响竖向承载力,但能否继续使用则要看它的用途。以一些工程检测实例,分析预应力管桩桩身与接口处断桩问题在高应变法检测中的表现。
Because the constructors do not comply with the relevant specification requirements during the process of construction, prestressed concrete pipe pile interface often appear quality problem in the process of driving piles by using hammering method, so the interface appeared. High strain dynamic testing have obvious adrantages in this kind of defect. Although the broken pile in prestressed concrete pipe pile interface does not affect its vertical bearing capacity, but whether it can be continuously used depends on its purposes. The paper analyzes the problems occurred in high strain dynamic testing at the interface and the broken of the prestressed concrete pipe pile by some engineering detection examples.
Because the constructors do not comply with the relevant specification requirements during the process of construction, prestressed concrete pipe pile interface often appear quality problem in the process of driving piles by using hammering method, so the interface appeared. High strain dynamic testing have obvious adrantages in this kind of defect. Although the broken pile in prestressed concrete pipe pile interface does not affect its vertical bearing capacity, but whether it can be continuously used depends on its purposes. The paper analyzes the problems occurred in high strain dynamic testing at the interface and the broken of the prestressed concrete pipe pile by some engineering detection examples.
引文
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[2]张德文,张建民.桩基础抗震性能的简易评价方法[J].地震工程学报,2013,35(1):69-83.
[3]李飒,王耀存,蒲玉成.海洋平台打桩过程中溜桩对桩基影响的研究[J].地震工程学报,2014,36(3):462-467.
[4]左照坤,童朝霞.近海风机单桩基础桩周边土应力特征分析[J].地震工程学报,2014,36(3):549-554.
[5]郑新志.薄壁方钢管混凝土桩劲化设计及轴压性能探讨[J].华南地震,2014,34(1):94-102.
[6]中华人民共和国住房和城乡建设部.JGJ106-2003建筑基桩检测技术规范[S].北京:中国建筑工业出版社,2003.
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