灌注导管是灌注桩施工时灌注混凝土的主要工具之一，其使用性能直接关系到灌注桩的质量。目前灌注导管的连接方法主要有以下几种：（１）法兰盘式连接。这是最常用的连接方式，缺点是拆装速度慢，工人劳动强度大；（２）六方型连接。结构复杂，加工成本高；（３）螺纹型连接。? Perfusion catheter is one of the main tools used to pour concrete during the construction of cast-in-place piles, and its performance is directly related to the quality of cast-in-place piles. At present, the connection methods of infusion catheters mainly include the following types: (1) Flange disc type connection. This is the most common connection method. The disadvantages are slow assembly and disassembly, and labor intensity of workers. (2) Six-way connection. Complex structure, high processing costs; (3) screw-type connection. ?