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Questions and Answers
What is the primary purpose of using a tremie pipe when placing concrete in a drilled shaft?
What is the primary purpose of using a tremie pipe when placing concrete in a drilled shaft?
- To discharge the concrete out the bottom of the pipe, filling the drilled hole
- To ensure a smooth, durable, and visually appealing surface
- To transport the concrete from the truck to the drilled hole
- To prevent the intrusion of water or soil into the concrete (correct)
Which of the following is NOT a common method for placing concrete in drilled shafts?
Which of the following is NOT a common method for placing concrete in drilled shafts?
- Using boom and line concrete pumps
- Screeding the concrete surface (correct)
- Directly from the concrete truck
- Pouring the concrete through a tremie pipe
What is the purpose of the hopper on top of a tremie pipe?
What is the purpose of the hopper on top of a tremie pipe?
- To prevent the intrusion of water or soil into the concrete
- To stabilize the borehole during excavation
- To transfer the concrete from the truck to the tremie pipe (correct)
- To ensure a smooth, durable, and visually appealing surface
What is the typical diameter range of a tremie pipe used for placing concrete in drilled shafts?
What is the typical diameter range of a tremie pipe used for placing concrete in drilled shafts?
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What is the purpose of using a drilling fluid when the borehole is underwater or unstable?
What is the purpose of using a drilling fluid when the borehole is underwater or unstable?
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