Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 17, Problem 17.9P
To determine
Find the vertical spacing of the reinforcement
Find the maximum tie length L.
Find the lap length
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A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is submerged with water table at the surface. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.
A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is dry. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.
A 6m vertical retaining wall is supporting a cohesion less horizontal back fill having a unit weight of 16kN/m3 and an angle off riction of 32 degrees. It carries a uniforms urcharge of15kN/m3. a)Determine the at rest lateral force per unit length of wall. b) Determine the Rankines active force per unit length of wall. c)Determine the Rankines passive force per unit length of wall.
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Principles of Foundation Engineering (MindTap Course List)
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- A 4.5 m high retaining wall is restrained from yielding. The wall supporting a horizontal overconsolidated soil having a unit weight of 17.4 KN/m3 with an angle of friction of 30°. Groundwater table is located 3 meters below the ground surface. Saturated unit weight of soil is 18.2 KN/m3. The soil has an overconsolidation ratio of 2. Compute the coefficient of earth pressure at rest. Compute the lateral force per unit length of wall Determine the location of the resultant force from the bottom of the wall.arrow_forwardPLEASE ANSWER ASAP A 6-m vertical unyielding retaining wall is supporting a cohesionless loose coarse-grained backfill having a unit weight of 16 kN/m3 and an angle of friction of 250. It carries a uniform surcharge of 15 kN/m3. Determine the total lateral force (in kN) per unit length of the wall.arrow_forwardA retaining wall 6m. high is to support a horizontal backfill. The upper 3m. of backfill has a unit weight of 16kN/m3, angle of friction of 30 degree. Water table is located 3m. below the ground surface and the saturated unit weight of the soil below the water tale is 19kN/m3 with an angle of friction of 36 degree. It carries a uniform surcharge of 25 kN/m2. 1. Compute the Rankine active force per unit length of the wall assuming that the wall can yeild sufficientlyto develop active state. 2. Compute the location of the resultant line of action from the bottom of the wall. 3. Compute the moment due to the resultant active force.arrow_forward
- A retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is saturated. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.arrow_forwardDetermine the total active thrust, in kN/m, for a retaining wall (height 5.12 m.) with horizontal backfill given the following properties: Unit weight = 17.79 kN/m3, Angle of internal friction = 30°, Cohesion = 11.71 kPa, and Surcharge = 9.33 kPa.arrow_forwardA vertical retaining wall 8 m high is supporting a horizontal backfill having a moist unit weight of 17 kN/m3 and a saturated unit weight of 20kN/m3. Angle of internal friction above and below the water table are 30° and 25° respectively with OCR = 2 below the water table. Ground water table is located 3 m below the ground surface. Determine the at rest lateral earth force per meter length of the wall. Determine the location of the resultant force. Determine the at rest lateral earth force per meter length of the wall and location if it carries a surcharge of 100 KPa.arrow_forward
- Determine the total active thrust, in kN/m, for a retaining wall (height 5.60 m) with horizontal backfill given the following properties: Unit weight = 17.42 kN/m3, angle of internal friction = 32 degrees, Cohesion = 11.76 kPa, Surcharge = 9.32 kPa.arrow_forwardA 5-m tall cantilever retaining wall retains soil having the following properties: Cohesion, c = 0 Unit weight, 19.8 kN/m3 Angle of internal friction, ϕ = 31⁰ The ground surface behind the wall is inclined at a slope of 3 horizontal to 1.6 vertical, and the wall has moved sufficiently to develop the active condition. Use Rankine’s Theory and consider 1 m length of wall. a. Determine the coefficient of active pressure b. Determine the total active force c. Determine the overturning moment on the wall Please answer this asap. For upvote. Thank you very mucharrow_forwardUse Eq. (12.3), Figure P12.2, and the following values to determine the at-rest lateral earth force per unit length of the wall. Also find the location of the resultant. H = 5 m, H1 = 2 m, H2 = 3 m, γ = 15.5 kN/m3, γsat = 18.5 kN/m3, Φ' = 34º, c' = 0, q = 20 kN/m2, and OCR = 1.arrow_forward
- For a smooth vertical wall supporting a granular backfill with ϕ' = 34°, determine Ka using Eq. (16.22) for α = 0, 5, 10, 15, and 20 degreesarrow_forward3) A 5-m-high retaining wall is shown in Figure-2. Determine A) Rankine active force per unit length of the wall and the location of the resultant B) Rankine passive force per unit length of the wall and the location of the resultantarrow_forwardA rigid retaining wall 5m high supports a backfill of cohesionless soil with angle of 40°. The water table is below the base of the wall. The backfill is dry and has a unit weight of 19kN/m³. Determine Rankine's passive earth pressure per meter length of the wall.arrow_forward
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