Leaving Cert DCG Geological Geometry: The accompanying map, located on

Question

The accompanying map, located on the back page of Section A, shows the plan of a garden with a swimming pool, similar to that in the image on the right.
The ground contours are at 1 metre vertical intervals.
On the map, ABCD is the edge of the pool and is level at an altitude of 5m.
Using side slopes of 1 in 1 for both the cuttings and the embankments, show the earthworks necessary to accommodate the eastern edge of the pool.

N.B.: The earthworks between A and B have already been completed for you.

(b) DE is the edge of a sloping pathway.
At D, the pathway is at an altitude of 5m and falls uniformly to an altitude of 4m at E.
Using the same side slopes as above, show the earthworks (cuttings) necessary to accommodate the edge of the pathway.

(c) At the southern end, the floor slab of the pool is sloping and is of uniform thickness.
R and S are two points on the floor and their altitudes are 1.5m and 3m respectively.
A vertical borehole at E reveals the bottom surface of the pool floor slab at an altitude of 1.5m.
The slope of the floor is north 55° east, as indicated by the line L.
Determine the dip and the thickness of the floor slab.

(d) There are four entrance steps to the pool as shown. The top step is level at an altitude of 4.8m.
In the space provided draw the vertical section (profile) through the steps and the floor slab along the line P.
Note: The top step, P₂, has already been drawn for you, and is represented as P₂Q₁ in the section below.

The accompanying map, located on the back page of Section A, shows the plan of a garden with a swimming pool, similar to that in the image on the right - Leaving Cert DCG - Question C-1 - 2016

Worked Solution & Example Answer:The accompanying map, located on the back page of Section A, shows the plan of a garden with a swimming pool, similar to that in the image on the right - Leaving Cert DCG - Question C-1 - 2016

Earthworks for Eastern Pool Edge (a)

Earthworks for edge DE of sloping pathway (b)

Dip and the Thickness of floor slab (c)

Vertical Section through steps and floor slab (d)

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