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A rectangular foundation of 4m x 6m (as shown in Figure 5) transmits a stress of 150 kPa on the surface of a soil depos...
5. A rectangular foundation of 4m x 6m (as shown in Figure 5) transmits a stress...
5. A rectangular foundation of 4m x 6m (as shown in Figure 5) transmits a stress of 150 kPa on the surface of a soil deposit. Plot the distribution of induced vertical stresses with depth under points A (the centre of the rectangle), B and C up to a depth of 20 m. 4m - B 6m 2mc Figure 5
Question 1: 10 marks Consider the raft foundation shown in Figure Q1 Dense soil ? 320...
Question 1: 10 marks Consider the raft foundation shown in Figure Q1 Dense soil ? 320 Raft Foundation q-700kPa 2m 8m Dense soil ?=32° c-0 Ysai 18kN/m Plan Section Figure Q1 Compute: i. Change in Stress in the centre of raft at a depth of 5m from ground. ii. Allowable Bearing capacity. 5 marks] [5 marks] 10 marks Question 2
A rectangular concrete slab, 10ft x 15ft (figure below), rests on the surface of a soil...
A rectangular concrete slab, 10ft x 15ft (figure below), rests on the surface of a soil mass. The load on the slab is 450kips. Determine the vertical stress increase at a depth of 10ft (a) under the center of the slab, point A; (b) under point B 15 tt Plan Section
The figure below shows a flexible rectangular raft foundation that is proposed for one of the...
The figure below shows a flexible rectangular raft foundation
that is proposed for one of the industrial buildings at the site.
The foundation is 10 feet X 20 feet and applies an uniform pressure
of 3000 psf to the underlying soil.
a. Using the influence factor method to calculate the stress
below a rectangular area, find the vertical stress increase
()
at 6 feet below points A, B, and C.
b. Assume that this foundation (thickness = 1.25 feet,
Ef...
Consider the raft foundation shown in Figure Q1 Dense soil ?-320 c-0 Raft Foundation q 700kPa...
Consider the raft foundation shown in Figure Q1 Dense soil ?-320 c-0 Raft Foundation q 700kPa 8m -o 8m Dense soil ?=32° c- 0 sa 18kN/m Plan Section Figure Q1 Compute 5 marks] [5 marks i. Change in Stress in the centre of raft at a depth of 5m from ground. ii. Allowable Bearing capacity.
3. The plan and anticipated loading of a proposed building foundation are shown in the Figure...
3. The plan and anticipated loading of a proposed building foundation are shown in the Figure below. Estimate the applied vertical stress ΔσΖ at 5 m below point A. Hint: the stresses at A due to the smaller 10 x 15 m rectangle with 500 kPa is equal to the stresses due to a larger 10 x 25m rectangle with 500 kPa and corner at A MINUS another 10 x 10 rectangle with 500 kPa also with corner at A....
2. The concrete mat foundation shown in figure below is subject to uniform loadings of 200...
2. The concrete mat foundation shown in figure below is subject to uniform loadings of 200 kPa and 150 kPa on the shaded and the unshaded areas respectively. Compute the intensity of vertical stress at depths 3m, and 6m below the point A. 40 260 N/ 150 kN/m 4.0 m
A 5m wide and 10m long rectangular foundation is built on a site where the soil...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
A 5m wide and 10m long rectangular foundation is built on a site where the soil...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Figure 8. The foundation carries a surcharge loading of q=65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Q2. A borehole at a site reveals the soil profile shown in Figure 2. Plot the...
Q2. A borehole at a site reveals the soil profile shown in Figure 2. Plot the distribution of vertical total and effective stresses with depth. Assume pore air pressure is zero and the pore-water pressure due to capillarity is negative as shown in Figure 3 Elevation (m) Very fine wet sand with silt w=596, S = 40% Fine sand saturated by capillary action Fine sand, 12% 2.0 5.4 Soft blue clay, w= 28% 20.6 Figure 2 Soil Porewater pressure distribution
5. A rectangular foundation of 4m x 6m (as shown in Figure 5) transmits a stress of 150 kPa on the surface of a soil deposit. Plot the distribution of induced vertical stresses with depth under points A (the centre of the rectangle), B and C up to a depth of 20 m. 4m - B 6m 2mc Figure 5
Question 1: 10 marks Consider the raft foundation shown in Figure Q1 Dense soil ? 320 Raft Foundation q-700kPa 2m 8m Dense soil ?=32° c-0 Ysai 18kN/m Plan Section Figure Q1 Compute: i. Change in Stress in the centre of raft at a depth of 5m from ground. ii. Allowable Bearing capacity. 5 marks] [5 marks] 10 marks Question 2
A rectangular concrete slab, 10ft x 15ft (figure below), rests on the surface of a soil mass. The load on the slab is 450kips. Determine the vertical stress increase at a depth of 10ft (a) under the center of the slab, point A; (b) under point B 15 tt Plan Section
The figure below shows a flexible rectangular raft foundation
that is proposed for one of the industrial buildings at the site.
The foundation is 10 feet X 20 feet and applies an uniform pressure
of 3000 psf to the underlying soil.
a. Using the influence factor method to calculate the stress
below a rectangular area, find the vertical stress increase
()
at 6 feet below points A, B, and C.
b. Assume that this foundation (thickness = 1.25 feet,
Ef...
Consider the raft foundation shown in Figure Q1 Dense soil ?-320 c-0 Raft Foundation q 700kPa 8m -o 8m Dense soil ?=32° c- 0 sa 18kN/m Plan Section Figure Q1 Compute 5 marks] [5 marks i. Change in Stress in the centre of raft at a depth of 5m from ground. ii. Allowable Bearing capacity.
3. The plan and anticipated loading of a proposed building foundation are shown in the Figure below. Estimate the applied vertical stress ΔσΖ at 5 m below point A. Hint: the stresses at A due to the smaller 10 x 15 m rectangle with 500 kPa is equal to the stresses due to a larger 10 x 25m rectangle with 500 kPa and corner at A MINUS another 10 x 10 rectangle with 500 kPa also with corner at A....
2. The concrete mat foundation shown in figure below is subject to uniform loadings of 200 kPa and 150 kPa on the shaded and the unshaded areas respectively. Compute the intensity of vertical stress at depths 3m, and 6m below the point A. 40 260 N/ 150 kN/m 4.0 m
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Figure 8. The foundation carries a surcharge loading of q=65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Q2. A borehole at a site reveals the soil profile shown in Figure 2. Plot the distribution of vertical total and effective stresses with depth. Assume pore air pressure is zero and the pore-water pressure due to capillarity is negative as shown in Figure 3 Elevation (m) Very fine wet sand with silt w=596, S = 40% Fine sand saturated by capillary action Fine sand, 12% 2.0 5.4 Soft blue clay, w= 28% 20.6 Figure 2 Soil Porewater pressure distribution
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