在介绍焊缝渗透探伤的基本探伤原理、方法及测试步骤的基础上，给出预应力砼管桩接桩焊缝的质量评定标准，并建议在管桩的施工中渗透探伤法可作为质量控制的常规检验手段。
Based on the introduction of principle and method in infiltration test of welding line, the standard is put forward for quality evaluation of joint construction in prestressed concrete pipe pile.
如向上泵送则必须先关闭截止阀，防止砼倒流，然后拆下出料管。
Such as pumping up you must turn off valve to prevent backflow of concrete, then removed the feed tube.
如向上泵送则必须先关闭截止阀，防止砼倒流，然后拆下出料管。
Such as pumping up you must turn off valve to prevent backflow of concrete, then removed the feed tube.
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