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Q.2. A rectangular foundation of size 2 by 2.5 m is constructed at a depth of D = (1.5 +) m below the ground surface as shown (where X is your group number). The foundation carries a load of 1000 kN. Use 2:1 method to find the stress increment. (2:1 means 2 vertical : 1 horizontal). a) Compute the settlement due to the consolidation of the clay. Assume the clay as one layer. b) Repeat (a) by dividing the clay layer into two equal sublayers (each sublayer 3 m). c) Write comments on your results in (a) and (b).

Q.2. A rectangular foundation of size 2 by 2.5 m is constructed at a depth of D = (1.5 +) m below the ground surface as shown (where X is your group number). The foundation carries a load of 1000 kN. Use 2:1 method to find the stress increment. (2:1 means 2 vertical : 1 horizontal). a) Compute the settlement due to the consolidation of the clay. Assume the clay as one layer. b) Repeat (a) by dividing the clay layer into two equal sublayers (each sublayer 3 m). c) Write comments on your results in (a) and (b).

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The value of x is 8

Q.2. A rectangular foundation of size 2 by 2.5 m is constructed at a depth of D= (1.5 + below the ground surface as shown (where X is your group number). The foundation carries a load of 1000 kN. Use 2:1 method to find the stress increment. (2:1 means 2 vertical : 1 horizontal). a) Compute the settlement due to the consolidation of the clay. Assume the clay as one layer. b) Repeat (a) by dividing the clay layer into two equal sublayers (each sublayer 3 m). c) Write comments on your results in (a) and (b). 1000 kN Ground surface Fine SAND "Yat= 19.81 kN/m² GWT 4 m = 19 kN/m³ 2 m by 2.5 m 1.5 m Fine SAND y= 19 kN/m³ Ye- 19.81 kN/m CLAY, yF 18 kN/m³ Ysat=19 kN/m³ e, = 0.8 Cc = 0.3 6m Bed Rock
Transcribed Image Text:Q.2. A rectangular foundation of size 2 by 2.5 m is constructed at a depth of D= (1.5 + below the ground surface as shown (where X is your group number). The foundation carries a load of 1000 kN. Use 2:1 method to find the stress increment. (2:1 means 2 vertical : 1 horizontal). a) Compute the settlement due to the consolidation of the clay. Assume the clay as one layer. b) Repeat (a) by dividing the clay layer into two equal sublayers (each sublayer 3 m). c) Write comments on your results in (a) and (b). 1000 kN Ground surface Fine SAND "Yat= 19.81 kN/m² GWT 4 m = 19 kN/m³ 2 m by 2.5 m 1.5 m Fine SAND y= 19 kN/m³ Ye- 19.81 kN/m CLAY, yF 18 kN/m³ Ysat=19 kN/m³ e, = 0.8 Cc = 0.3 6m Bed Rock
Q.1. The figure below shows the flow net for seepage under a concrete dam. The is silty sand with coefficient of permeability of 4X104 cm/sec, a void ratio of 0.6 and specific gravity of 2.7. The height of water upstream is H=( 6+÷) m (where X is your group number). (a) Determine the flow rate under the dam in m/day per m length of the dam. (b) Determine the water pressure distribution at the base of the dam. (Select 3 points under the base. Comment on your results. (c) From (b), calculate the resultant uplift force and its location from the upstream face of the dam. Also, calculate the weight of the dam to prevent uplift using a factor of safety of 5. (d) What is the factor of safety against piping? Is the dam safe? (e) Calculate the total vertical overburden stress, pore water pressure and the effective vertical overburden stress at Points A and B. Comment on your results. H 17.5 m 1.25 mt x B 4 m %3D 3D Impervious clay
Transcribed Image Text:Q.1. The figure below shows the flow net for seepage under a concrete dam. The is silty sand with coefficient of permeability of 4X104 cm/sec, a void ratio of 0.6 and specific gravity of 2.7. The height of water upstream is H=( 6+÷) m (where X is your group number). (a) Determine the flow rate under the dam in m/day per m length of the dam. (b) Determine the water pressure distribution at the base of the dam. (Select 3 points under the base. Comment on your results. (c) From (b), calculate the resultant uplift force and its location from the upstream face of the dam. Also, calculate the weight of the dam to prevent uplift using a factor of safety of 5. (d) What is the factor of safety against piping? Is the dam safe? (e) Calculate the total vertical overburden stress, pore water pressure and the effective vertical overburden stress at Points A and B. Comment on your results. H 17.5 m 1.25 mt x B 4 m %3D 3D Impervious clay
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