Inclined borings are made for taking samples under existing structures
Inclined borings are occasionally used instead of vertical holes
The spacing of inclined borings is kept such that one bore hole is vertically above the bottom of an adjacent bore hole
All the above
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The correct answer is D. All the above.
Inclined borings are made for taking samples under existing structures because they can be drilled through the ground without disturbing the structure above. They are also occasionally used instead of vertical holes because they can reach areas that would be difficult or impossible to access with a vertical hole. The spacing of inclined borings is kept such that one bore hole is vertically above the bottom of an adjacent bore hole to ensure that the entire area is properly sampled.
Here are some additional details about each option:
- Option A: Inclined borings are made for taking samples under existing structures. This is because they can be drilled through the ground without disturbing the structure above. For example, if you want to take a sample of the soil under a building, you could drill an inclined borehole from the outside of the building to the desired location. This would be much less disruptive than trying to drill a vertical borehole through the foundation of the building.
- Option B: Inclined borings are occasionally used instead of vertical holes. This is because they can reach areas that would be difficult or impossible to access with a vertical hole. For example, if you want to take a sample of the soil at the bottom of a steep slope, you could drill an inclined borehole from the top of the slope to the desired location. This would be much easier and safer than trying to drill a vertical borehole down the slope.
- Option C: The spacing of inclined borings is kept such that one bore hole is vertically above the bottom of an adjacent bore hole. This is to ensure that the entire area is properly sampled. If the boreholes were not spaced this way, there would be gaps in the sampling that could lead to inaccurate results.
I hope this information is helpful. Please let me know if you have any other questions.