5817部队在沙河大桥工地灌注混凝土钻孔桩基础时,使用了一种承插式快速连接导管。这种导管主要由一个料斗、数节中间管节和一节底管节三部分组成。它与法兰盘式连接导管比较,其结构具有下述特点:1.导管的管壁较厚,一般为10～15毫米;2.管节承口端有一“0”形橡胶密封圈; 5817 units used a type of socket-type quick-connect catheter when pouring concrete foundation into Shahe Bridge site. This catheter is mainly composed of a hopper, a few intermediate sections and a section of the end of the tube section. It is compared with the flanged connection catheter, the structure has the following characteristics: 1. catheter wall thicker, usually 10 to 15 mm;