高应变法检测预应力管桩接口探讨

The Discussion of High Strain Dynamic Testing Prestressed Concrete Pipe Pile Interface

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.