Plotting the longitudinal profile
Q1. There are 5 parts in Q1.
When plotting the longitudinal profile, assume that the profile is same across each borehole (or all boreholes are positioned along a straight line). First plot the ground profile (You can see contour lines in the plan. Also you can see information in the bridge elevation). After that use thickness of each layer in the Excel sheet with loads and borehole data. Please note that Boreholes BR-15 and BR-22 are provided with tender design documentations. After contract was awarded, two additional boreholes BR-18 and BR-19 were drilled. Four boreholes were available only during detailed design stage.
(a) Use hand calculations in this section. Calculate pile length considering vertical loads. Consider the lowest possible geotechnical strength reduction factor for soil properties (Use AS2159 reduction factors).
(b) Normally the lengths obtained from this calculation are increased by 10-15% in the tender design stage.
(c) Provide three risks involved in selecting the % for 1(c).
(d) Discuss mitigation measures for above risks
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