with a factor of safety of 3. Then, to the ground c) Comment on any differences for the computed allowable loads. G.S. Ys= 17 kN/m³ Dry soil = 32° 1.25 m +F C=13 kPa 1.0 mx 1.0 m W.T. Saturated soil Ysat. = 18 kN/m³ = 30° C=12 kPa 1.5
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- 1.A raft foundation 60 X 40 m carrying a net pressure of 145 kN/m^2 is located at adepth of 4.5 m below the surface in a deposit of dense sandy gravel 22 m deep: thewater table is at a depth of 7 m. Below the sandy gravel is a layer of clay 5 m thickwhich, in turn, is underlain by dense sand. The value of mv for the clay is 0.22 m^2/MN. Determine the settlement below the centre of the raft, the corner of the raftand the centre of each edge of the raft, due to consolidation of the clay.Determine the horizontal and vertical component of the hydrostatic force on the hemispherical boulder shon in fig. below: Note : this is not an assignment questionUse 10 kN/m3 for unit weight of water. For a concrete structure that retains water, a flow net is sketched as shown in Figure H8-3. Noting the marked location of the Datum, answer the following: Mark on the figure all boundary Also mark the type of each boundary. Calculate the uplift pressures at points A, B, C, D, E, and F. Calculate the factor of safety against The seepage loss (q) per day per meter length of the (i.e. q in m3/day/m) if the permeability of the soil is k = 10-4 m/sec.
- A 10 m depth of sand overlies a clay layer 8 m thick, below which is a further depth of sand. For the clay, mv =0 83m2 MN and cv =4 4m2 /year. Water table is at the surface level but is to be lowered permanently by 4 m, the initial lowering taking place over a period of 40 weeks. Calculate the final settlement due to consolidationof the clay, assuming no change in the weight of sand and the settlement 2 years after the start of lowering.Calculate the active earth pressure coefficient for the backfill soil using both the Rankineand Coulomb Earth Pressure theories. Is there a significant difference in the two Kavalues?a building will have a sitting wall on the north side of the building to allow for seating during outdoor season. the wall will be 1.5 meter tall. what is the minimum width of the wall to ensure that it will not slide or overturning? the soil behind the wall is a sand with Gamma dry= 18.3 kN/m^3 , gamma buoyant =11.5 Kn/m^3 , gamma water= 9.81 kN/m^3 and phi= 36 degrees. the water table is 0.5 m below the ground surface. to enhance the aesthic value of the seating area, the architect has asked that the wall he made of granite ( gamma granite= 25 kN/m^3 . HANDWRITTEN PLS
- a building will have a sitting wall on the north side of the building to allow for seating during outdoor season. the wall will be 1.5 meter tall. what is the minimum width of the wall to ensure that it will not slide or overturning? the soil behind the wall is a sand with Gamma dry= 18.3 kN/m^3 , gamma buoyant =11.5 Kn/m^3 , gamma water= 9.81 kN/m^3 and phi= 36 degrees. the water table is 0.5 m below the ground surface. to enhance the aesthic value of the seating area, the architect has asked that the wall he made of granite ( gamma granite= 25 kN/m^3. Hand written plsA 12m high circular tank with 45m radius contains oil weighing 9.4kN/m3. This tank stands over a 3m saturated sand layer (γsat = 18.88 kN/m3) underlain by a 14m thick clay layer (γsat = 17.30 kN/m3 , e = 1.27 and Cc = 0.40). Neglect weight of the tank. Assume no precompression has occurred. What is the difference between the settlement below the center and below the end of the tank?An oil tank is to be sited on a soft alluvial deposit of clay. Below the soft clay is athick layer of stiff clay. It was decided that a circular embankment, 10 m diameter,with wick drains inserted into the soft clay would be constructed to preconsolidateit. The height of the embankment is 6 m and the unit weight of the soil comprisingthe embankment is 18 kN/m3. The following data are available: thickness of softclay = 7 m, ks = 1 × 10−10 m/s and Ch = 0.6 m2/yr. The desired degree ofconsolidation is 90% in 12 months. Determine the spacing of a square grid of thewick drains. Assume wick drain of size 100 mm × 3 mm and qw = 0.1 × 10−6 m3/s.The flow point distance is 4 m. Assume a half-closed system.
- A reinforced concrete water tank of size 25 ft x 25 ft and resting on the ground surfacecarries a uniformly distributed load of 5.25 kips/ft2. Estimate the maximum verticalpressures at depths of 37.5 and 60 ft by point load approximation below the center of thetank.The sand layer shown is 2.5m thick. Beneath the sand layer is a 1.8m thick clay layer, underneath the clay layer is a solid rock. Water table is at depth of 0.9 m below the ground surface. SAND: Ymoist= 23KN/m3 ; Ysat= 21KN/m3 CLAY: Ysat= 23 KN/m3 ; LL= 42% e=0.7 A.) Compute the overburden pressure at mid-clay layer. B.) Find the maximum surface pressure without exceeding a 139.5mm settlement in clay layer if it is assumed to be normally consolidated. C.) If surface pressure is 70kpa and pre-consolidation pressure is 80kpa, find the settlement in clay layer.A masonry dam of trapezoidal cross section, withone face vertical has a thickness of 60 cm at the top,3.70 m at the base, and has a height of 7.40 m.What is the depth of water on the vertical face ifthe resultant intersects the base at the downstreamedge of the middle third? Assume that the upliftpressure varies uniformly from full hydrostatic atthe heel to zero at the toe. Follow the steps: Step 1. Solve for all the forces. Step 2. Solve for Rx and Ry. Step 3. Solve for RM and OM. Step 4. Solve for x, where we will get the value of h or the depth of water. Note: The answer must be near or exactly 5.83m.