A retaining wall x m high was designed to stabilize a horizontal ground surface. The back...

A retaining wall x m high was designed to stabilize a horizontal ground surface. The back

of the wall is inclined 15 o to vertical direction and can be assumed rough with interface frictionangleofxo.Thesoilparametersareφ' =33o ,γ =18kN/m3,γ =20kN/m3.

Assume no seepage effects.

(a) Draw a diagram to show the given wall dimensions, relevant inclinations and the direction of the active force on the wall.
(b) Calculate lateral force on the wall assuming the ground water table is at the base of the wall.
(c) After a flood, the ground water table rises 0.5m above the wall top surface. Calculate the lateral force on the wall after the flood.
(d) If the weight of the wall is (500+ x) kN/m, is the wall safe against sliding after flooding event? Please show your calculations. . the value of x is 28

Expert Solution

ANSWER:-----

FRICTION ANGLE:---- Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat).

Ally Wells answered 7 months ago

A retaining wall against a mud slide is to be constructed by placing 1.2 m-high rectangular...

A retaining wall against a mud slide is to be constructed by placing 1.2 m-high rectangular concrete blocks (ρconcrete = 2700 kg/m3 ) side by side, as shown in Figure 1. The friction coefficient between the ground and the concrete blocks is f = 0.3, and the density of the mud is about 1800 kg/m3 . There is concern that the concrete blocks may slide or tip over the lower left edge as the mud level rises. a) Determine the...

A strip wall footing 1.5 m wide is located 1.1 m below the ground surface. Supporting...

A strip wall footing 1.5 m wide is located 1.1 m below the ground surface. Supporting soil has a unit weight of 19.60 kN/m3 . The results of laboratory tests on the soil samples indicated that the supporting soil has the following properties: c’ = 57.5 kN/m2 and I’ = 25°Groundwater surface was not encountered during the subsurface exploration. Determine the allowable bearing capacity of the soil using a factor of safety of 2.5.

A retaining wall having a smooth vertical back retains a soil mass for a depth of...

A retaining wall having a smooth vertical back retains a soil mass for a depth of 9 m. The soil has the following properties: cu = 34 kPa; u= 0º; γ = 18kN/m3 . Assume groundwater table is well below the base of the retaining wall and NO rainwater in the tension crack. Calculate the depth of tension crack (in m). Calculate the resultant active thrust (in kN/m) Calculate the point of application from base (in m).

A 4-m-high and 6-m-wide wall consists of a long 18x30 cm2 cross section of horizontal bricks...

A 4-m-high and 6-m-wide wall consists of a long 18x30 cm2 cross section of horizontal bricks (K=0.72W/mC) separated by 3-cm-thick plaster layer (K=0.22W/mC). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid form (K=0.026W/mC) on the inner side of the wall. The indoor and outdoor temperatures are 22C and -4 C, and the combined convection and radiation heat transfer coefficients on the inner and outer walls are 10W/m2C and 20W/m2C, respectively. Determine the...

1. A carpenter tosses a shingle horizontally off an8.82-m-high roof,and it hits the ground a horizontal...

1. A carpenter tosses a shingle horizontally off an8.82-m-high roof,and it hits the ground a horizontal distance of 15.0 m away. A. How long was the shingle in the air? B. How fast was it thrown? A railroad locomotive can exert a 350-kN force. By itself, it accelerates at 1.2 m/s2; when pulling a train, the acceleration drops to 0.088 m/s2. A. Find the mass of the locomotive. B. Find the mass of the remainder of the train.

A heating system is designed to keep the inner wall surface temperature of a room at...

A heating system is designed to keep the inner wall surface temperature of a room at 25C. Only one wall of the room is contacted with the outer environment. The crosssectional view of the wall is schematically shown in Fig. H1. The height, width and thickness of the wall are 2.5 m, 10 m and 0.2 m, respectively. The wall is made from red bricks with a thermal conductivity of 0.72 W/m.K and solar absorptivity of s = 0.63. The...

Two masses are on a horizontal, frictionless surface. The plane of the surface is the x-y...

Two masses are on a horizontal, frictionless surface. The plane of the surface is the x-y plane. Mass m1 = 1.0kg is at rest while mass m2 = 2.0kg is moving in the positive x-direction at 15m/s. The two masses then undergo a collision and mass m2 is moving with a speed of 9.0m/s at an angle of 35 degrees after the collision. 1) What is the speed of the center of mass of the two masses before the collision?...

a)An object of mass ?m rests on a horizontal frictionless surface. A constant horizontal force of...

a)An object of mass ?m rests on a horizontal frictionless surface. A constant horizontal force of magnitude ?F is applied to the object. This force produces an acceleration: always only if ?F is larger than the weight of the object only while the object suddenly changes from rest to motion only if ?F is increasing choice A b)Now let there be friction between the surface and the object. If the object has a mass of 10 kg, and ??μs =...

A 3 m by 3 m square footing is sitting 1.6 m below the ground surface....

A 3 m by 3 m square footing is sitting 1.6 m below the ground surface. The anticipated column loads include a moment (M=50 kN.m), a horizontal force (Qh=40kN, acting in the same direction as the moment) at the ground surface and a vertical force (Qv=260kN). Determine the minimum and maximum stress beneath the footing and draw the stress profile diagram to scale.

In a vertical smooth wall 5m high, the water table is at 2m below the ground...

In a vertical smooth wall 5m high, the water table is at 2m below the ground surface. Calculate and draw the active lateral pressure using the following data: ydry = 15 ysat = 17. 5 0 = 34 ° above the water table ° 36 = j below the woter table Also, calculate the active thrust (Pa) and its location?

Question