Concrete shall be provided to the pile by transit mixers and positioned by the full length tremie pipe technique. Hook up a hopper to the highest of tremie pipe. After that, near the joint between hopper and tremie pipe having a metal plug ahead of concrete to start with demand. https://castinsitupilesinbanglade80011.blogsuperapp.com/33113159/5-simple-techniques-for-cast-in-situ-piles