How does the varying soil properties influence the stability of the slope? Draw the slope to scale on a graph paper or using CAD and split the sliding section up into a suitable number of slices.

Component B1 – Site investigation design problem
A geotechnical investigation report for a proposed building is on blackboard under the coursework material folder.

Produce a detailed critique of the geotechnical investigation report following the recommendation of the code of practice for ground investigations as outlined in BS 5930:2015+A1:2020 and other relevant materials.
(a) Write a review on ten case histories of recent slope failures and summarise your findings using table, stating the case and the cause of failure.
(b) An embankment slope consisting of a granular fill is underlain by a deep deposit of clay of specific gravity of 2.65.

The granular fill has a bulk unit weight of 19.3 kN/m3, effective cohesion, c′ = 7.2 kPa and internal friction angle, φ′ = 30°.

If the clay soil has varying moisture content and undrained shear strength at different times of the year as presented in Table 1, investigate the stability of the embankment slope using the slip circle shown in Figure 1.

How does the varying soil properties influence the stability of the slope? Draw the slope to scale on a graph paper or using CAD and split the sliding section up into a suitable number of slices.