Midterm suppl. problems

Midterm suppl. problems - Mid-Term upplementary roblems S P...

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Mid-Term Supplementary Problems v/ A hapezoidal concrete canal with sloped sides as shown is used to transport storm water to a local treatment plant However it was cut thmugh what can be assumed to be a fully saturated soil due to seasonal rainfall wtrich is enough to maintain the GWT as shown. In order to prolong the service life of the canal, a filter drain made of loosely compacted granular material and a geotextile fabric was placed to line the sloping wall of the canal, along the outside. The tlow through the filter will not be fully pressurized. ' Based on field investigations, the seepage into the filter drain will reach a steady state relatively quickly, and all of the water thal is collected at the base of the wall will be taken away via a pipe. Estimate the seepage and provide an initial design for the minimally sized pipe that can accommodate this flow if the minimal flow velocity is 4.47x 10-s (m/s). k = 104 m/s Trapezoidal Canal Granular Filler CanalWall / ,t' 8.66 n/ ;it" /,i* /i i :{ Pipe of Diametef, D
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( | /,1 \Shallow footings have been proposed to bear loads that will be transfened fmm edge V LTcolumns in a building. However the proximity of a property line does not allow for square-shaped footings to be used and the centre-to-centre span between the columns is far enough such that combined fuings will not be nec€ssary. Previous experience has shown that rectangular footings with a length (L) b width (B) ratio of 3:2 should be adequate to pmvide proper bearing while rcspecting property lines. Tl€ proposed net loading (Q) of 150 kN will ac't at an angle as shown in the diagram below. The soil is a medium clayey deposit in teims of stiftness (c' = 20 kPa) with /' 39""n4 unit weight of 18 kN/m3. Design footing for beadng capacity. l+----_ B--- - ---i
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The tigure below depicts a retaining wall of height, H = 21 ft. The backfi,l is a stiff clay, with /' = O: c' 630 lb/ff and /"a 113 ltr/d. a) Determine the force intensity acting on the wall due to the soil if the wall movement (Ax) at the top of the wall is measured to be about 0.10 ft (0.005H) from the original position. No o.cFve ?,e9tu,e $ f" b) lf the wall has now rotated sucn nat tie top of the wall has moved 0.21 fi, determine the
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Midterm suppl. problems - Mid-Term upplementary roblems S P...

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