Answer Happy

Pier B is going to be constructed to allow the loading and unloading of cargo ships. The pier is 105 m x 135 m and will be supported on pile foundations. Live + dead loads of the pier are approximately 45 kPa. Figure 1 shows a plan view of the pier with the proposed pile layout. There will be 19 rows of piles, so each row will be 7.5 m on center. Figure 2 shows an elevation including the soil profile beneath the pier. The piles are 0.45 m square, reinforced concrete piles. 135 m DOO 中中中中中 Od Pile Row 105 m офф ооо OOO Figure 1: Plan view of Pier showing centerline of each row of piles 1) What is the design load on a typical interior pile? We will start by designing a typical pile at the East end of the pier. 2) Using the boring logs and soil profile that you developed in earlier assignments, sketch a profile of the pile showing strength and density of the soil layers. 3) How far must the piles be driven in order to resist the structural load with a factor of safety of 2? Neglect group interaction effects.
Now we will examine a typical pile at the West end of the pier. 4) Using the boring logs and soil profile that you developed in earlier assignments, sketch a profile of the pile showing the soil layers. Now discretize the clay layer into sublayers, where each sublayer has a uniform strength. Show the sublayer boundaries on your plot and the assumed strengths within each sublayer. You can still use Su = 35 kPa for the fill layer. For the clay remember that Su/o' = 0.3 for OCR = 1. 5) Negative skin friction on the pile shaft could occur above the neutral plane if the clayey materials consolidate due to surface loads. Assuming the neutral plane is located at the base of the clay layer, estimate the load (in kN) that will be introduced to each pile from negative skin friction above the neutral plane. 6) How far must the piles be driven to resist the column loads and negative skin friction loads with a factor of safety of at least two?