Question

Sue has secured sections of tremies with wire rope, in addition to the regular couplings. What is the purpose of using wire rope in securing the sections of tremies?

1) To provide additional support
2) To prevent leakage
3) To increase flexibility
4) To reduce vibrations

Answer 1

The wire rope in securing sections of tremies is used to provide additional support, ensuring secure attachment under the demanding conditions of concrete pouring. The wire rope's vertical tension supports the system similarly to how it supports a tightrope walker, despite most tension being horizontal.

Step-by-step explanation:

The purpose of using wire rope in securing the sections of tremies, in addition to the regular couplings, is To provide additional support. This practice ensures that the tremie sections remain securely attached to each other during concrete pouring operations, which can be quite demanding. Vertical tension in the wire rope acts as a normal force that supports the weight of the tremie setup, much like it supports the weight of a tightrope walker. In the case of a tightrope walker, the tension in the wire is nearly six times the weight of the person, and the horizontal components of the tension in opposite directions cancel each other, leaving only a small fraction of the vertical component to support the weight.

A similar understanding can be applied to the tremies, but with the primary intent of keeping the sections connected against the forces exerted by the concrete flow and the weight of the tremie itself. While wire rope does aid in tension support, the other functions, such as preventing leakage, increasing flexibility, or reducing vibrations, are not primary motives for its use in this context.