Clay: Ydry - 17 kN/m³, Ysat Sand: Ydry = Ydry 20 kN/m³, 18 kN/m³ › Ysat 22 kN/m³ I WT 景 3.0 m 2.0 m + 3.0 m 3.0 m
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Consider the soil profile depicted in the figure below. The water table is located 3 m below the ground surface. Calculate the vertical effective stress at Point A in kPa (acceptable tolerance = 2%).
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- A soil formation is composed of 5 m thick clay and 5 m thick sand being the sand above the clay. The ground water table (GWT) is located at 2 m below the ground surface. 40 kPa 2 m Sand Ydry = 17.66 kN/m^3 VGWT Sand 3 m Y sat = 20.93 kN/m^3 LI = 64% PL = 20% w = 40% 5 m Clay eo = 0.60 G. = 2.60 1. Calculate the primary compression index. [ Select ] 2. Calculate the primary consolidation settlement of the normally consolidated clay layer if there is a surcharge of 40 kPa acting on the ground surface. [ Select] 3. Calculate the secondary settlement of the clay layer 5 years after the completion of the primary consolidation settlement. Time for completion of primary settlement is 2 years. Use C, = 0.02. [Select ]Qi/ A 5m deep deposit of silty sand lies above a 4m deep deposit of gravel. The gravel is under- lain by a deep layer of stiff clay. The ground water table is found 2m below the ground surlace. The Soil properties are :- of sand below GWT = 1.75 Mg/m³ Isat of gravel 2.05 Mg/m ³ Isat of sand above G.WT = 1.7 Mg/m²³ 2 Draw The distribution of vertical total stress, Pore water pressure, and vertical effective stress with depth down to the clay layer. P = 1.7 My/m²³- $t1 = 1.95 Mg/m³, silty sand Seat - 2.05 Mg/m²/ G.L G.WT I gravel still clay) 4mYsat- Yd For a given soil, show that: e = \Yd-Ysat+Yw/
- here are the answer, only need solutions 1.f = 11.46 MPa 2.Mcr= 88.90 kN-m 3.fconc= 17.14 MPa; fsteel= 318.20 MPaDiscuss limitations of soil erosion equation RUSLE(A=R×K×LS×C×P). The soil profile at a site consists of 2 m of sand underlain by 6 m of clay, which is underlain by very stiff clay that can be assumed to be impervious and incompressible. The water table lies 1.5 m below the ground level. The soil properties are as follows:Sand: gsat 5 18.5 kN/m3, gm 5 17.0 kN/m3Clay: e0 5 0.810, gsat 5 19.0 kN/m3, cv 5 4.5 m2/yearWhen the ground is surcharged with 3 m-high compacted fill with a bulk unit weight of 19 kN/m3, the settlement was 160 mm in the first year.a. What would be the settlement in two years?b. After one year since the fill was placed, what would be the pore water pressure and the effective stress at the middle of the clay layer?c. If the clay is normally consolidated, estimate the compression index and the coefficient of volume compressibilit
- Soil k (mm/s) 0.10 300 тm B 0.03 0.0049 a.Compute the equivalent k in cm/s. A C b.Compute the rate of flow in cm³ /hr. 15 cm15 cm15 cm» Given: Cross-sectional area of the soils A, B and C is 100 mm x 100 mm2 m 2 m 3 m Figure P2.11 A Dry sand; e = 0.5 G, = 2.65 B Water table Sand Gs = 2.65 e = 0.6 C Clay w = 36% GS = 2.75 D RockFind the seepage velocity through soil 1 if the average velocity is 0.0073 meters per second. Use 3 decimal places. H1 = 1.25 m n1 = 32%H2 = 2.51 m n2 = 22% H3 = 2.51 m n3 = 28%
- ‘م السبت ۲۹ مایو The total volume of a soil specimen is 80,000 mm3 and it weighs 150 grams. The dry weight of the specimen is 130 grams and the density of the soil solids is 2680 Kg/m3. Find the Specific Gravity of Soil Gs. knowing that pwater3D1000kg/m3 Select one: a. 2.68 b. 2.78 O c. 2.90 d. 2.88 Next page Jump to... Announcements ►7. Assume the water table drops 3 feet for the soil profile shown. What settlement will occur? Assume the unit weights above the water table for the initial condition will extend downward to the water table at its new position. 14' V Sand, y = 110 lb/ft³ Sand, Ysat 116 lb/ft³ = Cc = 0.25 C₁ = 0.06 e, = 0.9 N.C. clay Ysat = 120 lb/ft³ sand6. Suppose that we derive the following soil characteristic curves for two Fenton Tract soil formations. Water drains vertically at soil moisture pressures less than 3.36 m. Roots cannot extract water above a pressure of 150 m. Theta (m^3/m^3) 0.6 0.5 0.4 0.3 0.2 0.1 0 0.001 0.1 10 Psi (m) 1000 100000 3.36m 150m A 6a) What is the (approximate) available water holding capacity (AWC) of each soil? You can sketch on the figure above to explain your answer.