(Solved): 1. A building foot print with a shape shown below needs a foundation \( 25^{\prime} \) below grade, ...

1. A building foot print with a shape shown below needs a foundation \( 25^{\prime} \) below grade, no bracing will be used for the foundation excavation. Find a. The volume in \( \mathrm{yrd}^{3} \) to be excavated. Assume \( 30 \% \) bulking after excavation. b. How many 10 cy truck trips will be required? c. A \( 100^{\prime} \) deep slurry wall will be created at the above site to support the excavation. The wall is 2 ' wide. How many cubic feet of slurry bentonit is required? 2. If the depth of excavated site shown below is \( 8^{\top} \) and you need to backfill it with soil to \( 98 \% \) compaction, how many ton of soil is required? All dimensions are in \( \mathrm{ft} \). \( (\mathrm{DRDS}=115 \mathrm{lb} / \mathrm{ft} 3) \) 3. Calculate surface are of the site "ABCDE", if the survey results are: 4. A \( 200^{\prime} \) wall will carry a load of 1800 tons, how wide will the footing be if is on Sedimentary rock. 5. Design a rectangular footing to support two square columns. The exterior column (I) carries \( 200 \mathrm{k} \) and. The interior column (II) carries a Load of \( 350 \mathrm{k} \). if we assume the pressure is uniform and width is \( 2.5 \) times of length and soil type is Soil GW and GP. (Sketch the footing with all details) 6. A circular foundation supports a hollow rectangular steel column with dimension of 10 \( \times 12 \) in and thickness of \( 0.5 \) inch. The column carries a load of 100 kips and the foundation top surface is 4 feet below grade. If depth of foundation is \( 1 \mathrm{ft} \) and it is built on a soil with allowable soil pressure of \( 6 \mathrm{k} \mathrm{ft}^{2} \) a. Design the required surface area for the foundation for Column load only: b. Analyze your design by considering weights of the foundation, column and soil above the foundation. Concrete unit weigh \( =140 \mathrm{lb} / \mathrm{ft} 3 \) Soil Unit weight \( =95 \mathrm{lb} / \mathrm{ft} 3 \)