c' = 0 kPa 4'=30° 2m Y = 17 kN/m³ moist Ysa 19 kN/m³ WT ✓ 2m WT ☑ 7m
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For the retaining wall shown below, determine the passive earth pressure coefficient if the wall friction is equal to 15 degrees
g = 9.81
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- GEOTECHNICAL ENGINEERING 2 - '21 QUIZ 5 A 6m retaining wall supports a soil with the following properties as shown below. A surcharge of 20 kPa is imposed on the ground surface. Water table is located between the interface of the 2 types of the soil. If soil above water table is dry, find: A. Total Active pressure acting on the wall per meter of its width. B. Location of the Resultant pressure from the base of the RW. C. Overturning moment caused by the active pressure acting on the wall. STRATUM Depth Gs e 1 2 m 2.50 0.65 28° 1.8 kPa 2 4 m 2.85 0.48 32° 2.4 kPaWhen movement of a wall under the earth pressures from the backfill was prevented the coefficient of earth pressure was recorded as 0.5. The ratio of the coefficient of passive and active earth pressure of the backfill isQ-Retaining walls- A 6 m high retaining wall with a vertical back has a backfill of silty sand with a slope of 10° for the backfill with values of KH = 760 kg/m²/m and Ky =100 kg/m²/m, the total active earth pressure will approximately be.
- From the observed data in a pycnometer test indicated in the table above, determine the specific gravityof the soil solids.A reinforced concrete retaining wall is proportioned as shown below. There is a water table located H1m beneath the ground surface. Use ultimate bearing capacity of 450 kPa. Based on the figure, the dimensions are given below. Use γc = 23.48 kN/m3 wall thickness = 0.47m footing thickness = 0.53m toe slab length = 2.33m heel slab length = 4.38m ground water table depth = 2.99 H2 = 3.84 The following values were calculated for this particular retaining wall: Righting moment: 3,868 kN-m/m Overturning moment: 908 kN-m/m Total vertical load: 999 kN/m What is the factor of safety for bearing pressure? Please answer this asap for upvote. Thanks in advanceFind the active lateral force/unit of width and the point of application for a verticalretaining wall with the following data: γ = 110 pcf, Φ= 36° , C = 0 psf, H = 18 ft; Using theCoulomb equation with δ = 20° and (a) horizontal backfill, (b) backfill slope 10° , and (c)backfill slope -10°
- The following figure shows a section of an anchored retaining wall embedded into a saturated stiff clay layer. The sand has a unit weight of = 18 kN/m³, c' = 0 kPa and o' = 34º. The clay has a unit weight of = 20 kN/m³, c₁ = 80 kPa and = 0°. A uniform pressure of 40 kPa is applied on the soil surface. The short term stability of the wall is considered in an undrained analysis. Use the Rankin's theory of lateral earth pressure to determine the active and passive horizontal stresses. You should apply the requirements of AS 4678 and the partial factors of safety method in estimation of soil pressures. Assume the soil is in-situ and use a structural classification factor of ₁ = 1. 3m 1m Water table 1.5m 40 kPa Not to Scale Sand Clay TaA vertical retaining wall 8.8 meters high retains a horizontal backfill having the following properties: Void ratio = 0.64; Specific Gracvity = 2.64; Water Content = 28 %; Angle of internal Friction = 31°. Compute the location of the active force in meters from the bottom of the wall acting on it if the water table is 3.0 meters below the ground surface.You are reviewing the stability of the gravity wall when the backfill has properties with: Φ' = 35° and γt = 16.5 kN/m3. The soils in front of the wall is ignored in the stability analysis, and the drainage blanket has no influence. Assume the coefficient of the base friction is, μ = 0.3, and the unit weight of concrete is γc = 23.5 kN/m3. a) draw the lateral earth pressure diagram and determine the total active lateral force. b) determine the factor of safety against overturning. c) determine the factor of safety against sliding.
- EXAMPLE 2 A gravity retaining wall shown below, is required to retain 5 m of soil. The backfill is a course-grained soil with y =18 kN/m3 and o' = 30. the existing soil below the base has the following properties; y = 20 kN/m3 and ' = 36. The ground water table below the base of the wall. 0.6 m Drainage blanket a) Determine the stability of the wall. b) If the drainage system becomes clogged during several days of a storm and the groundwater rises to the surface. Determine the stability 5 m Backfill of the wall. 1m 4.2 m Concrete, Y. = 24 kN/mQ-1: Figure-1 shows a 4.5-m-high retaining wall. The wall is restrained from yielding. Then find, the following conditions: A) Completely dry soil (no ground water) B) Completely saturated soil systemA retaining wall is 4 meters tall and retains granular soil having a drained friction angle of 32 degrees and a total unit weight of 18.5 kN/m³. The groundwater table is located at mid-height of the wall. Prepare a simplified scaled drawing showing the wall, ground surface, groundwater table and all active earth and water pressure diagrams. State your assumption of wall friction. Label all heights and depths and provide calculated values for the pressures at the top and bottom of each pressure polygon. Calculate the total force acting on the back of the wall in pounds per foot of wall, and the location of the resultant force above the toe of wall. Include all units.
