This brings back one of my childhood memories. Back in the early 50s I attended a parochial grammar school in the New Orleans area and they were building a new church building right outside my classroom window. The ground there was very soft and organic: piles were an absolute necessity for any structure beyond a one story home and even some of them would sink if piles had not been used. The pile driver that they used was a lot like the one in the video. It may even have been the same model. It's operation was exactly like the one in the video.
They used steel reinforced, concrete piles that were poured on site. The piles used three sections of steel tube/pipe, probably 40 to 50 feet long each. The second and third sections were welded on to the previous section once it was in the ground. Then the re-bar reinforcement assembly was dropped in and the concrete truck backed up and filled it with concrete.
The first, hollow steel section for the pile was brought into position and when the pile driver's head was dropped onto it from a distance of just a foot or so, the ground was so soft that the section of the pile would just zip down by more than half it's length, probably 30 feet or more. Just a few strokes with the pile driver's head was enough to sink it all the way. And that was the ground we were walking on, the ground that my house stood on a couple of blocks away. Only towards the end of when the second section of the pile was being driven did the strokes sink the pile for less than a full foot on each stroke. Even as a eight or nine year old, this made a tremendous impression on my mind. And yes, that church still stands today. I guess they knew what they were doing.
There are currently 1 users browsing this thread. (0 members and 1 guests)