导管通常用于将混凝土灌注到钻孔桩中，在钻孔桩投入使用后，以避免混凝土桩断裂或裂缝。

 

 

 

 

Tremie pipes are normally used to pour concrete into a drilled pile, after the steel cage reinforcement is placed in operation, to avoid concrete pile breakage or gaps.