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2 (a) During the construction of a highway bridge, it is expected that the average permanent load on a clay layer will increase by about 180kPa. The soil profile and some parameters of the soil is given in diagram below. (i) Estimate the value for consolidation settlement if the value of Compression index equal to 0.36. (i) Determine the surcharge needed to eliminate the entire primary consolidation in 6 months. (i) Suggest a best method to reduce the time and amount of surcharge to eliminate the entire primary consolidation 1.2m ( water table) Sand Y, 18 kN/m Y- 21 kN/m 7.0m Ya Clay 20 kN/m Sm Ç= 0.36; Cv = 0.38 m³imonth Sand Y- 23 kN/m 1.0 Sand Sand 2H - , 0.6 Sand Au, constant "Rock Au, constant 0.4 02 10 20 30 40 50 60 70 80 90 Average degree of consolidation, US) 0.2 0.4 0.6 0.8 P. 9.1 03 1. 1.2 14 1.6L 40 50 60 70 80 90 100 U (S) Plot of Apo/Ap against U for various values of

2 (a) During the construction of a highway bridge, it is expected that the average permanent load on a clay layer will increase by about 180kPa. The soil profile and some parameters of the soil is given in diagram below. (i) Estimate the value for consolidation settlement if the value of Compression index equal to 0.36. (i) Determine the surcharge needed to eliminate the entire primary consolidation in 6 months. (i) Suggest a best method to reduce the time and amount of surcharge to eliminate the entire primary consolidation 1.2m ( water table) Sand Y, 18 kN/m Y- 21 kN/m 7.0m Ya Clay 20 kN/m Sm Ç= 0.36; Cv = 0.38 m³imonth Sand Y- 23 kN/m 1.0 Sand Sand 2H - , 0.6 Sand Au, constant "Rock Au, constant 0.4 02 10 20 30 40 50 60 70 80 90 Average degree of consolidation, US) 0.2 0.4 0.6 0.8 P. 9.1 03 1. 1.2 14 1.6L 40 50 60 70 80 90 100 U (S) Plot of Apo/Ap against U for various values of

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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2 (a) During the construction of a highway bridge, it is expected that the average permanent load on a clay layer will increase by about 180kPa. The soil profile and some parameters of the soil is given in diagram below. (i) Estimate the value for consolidation settlement if the value of Compression index equal to 0.36. (ii) Determine the surcharge needed to eliminate the entire primary consolidation in 6 months. (i) Suggest a best method to reduce the time and amount of surcharge to eliminate the entire primary consolidation 1.2m ( water table) Yan= 18 kN/m Y= 21 kN/m Sand 7.0m Yer 20 kN/m Clay C- 0.36; CV = 0.38 m/month Sm Sand Y= 23 kN/m 1.0 1.0 Sand Sand 0.8 Clay H = L. Ch 0.6 Sand' Au,= constant RockAu.- constant 0.4 0.2 10 20 30 40 50 60 70 80 90 Average degree of consolidation, U(%) 0.2 0.4 0.6 APn 08 P. 9.1 0,5 I 2 5 10 1.0 1.2 1.4 1.6 40 50 60 70 80 90 100 U (%) Plot of Ap/Apw against U for various values of Ap/p
Transcribed Image Text:2 (a) During the construction of a highway bridge, it is expected that the average permanent load on a clay layer will increase by about 180kPa. The soil profile and some parameters of the soil is given in diagram below. (i) Estimate the value for consolidation settlement if the value of Compression index equal to 0.36. (ii) Determine the surcharge needed to eliminate the entire primary consolidation in 6 months. (i) Suggest a best method to reduce the time and amount of surcharge to eliminate the entire primary consolidation 1.2m ( water table) Yan= 18 kN/m Y= 21 kN/m Sand 7.0m Yer 20 kN/m Clay C- 0.36; CV = 0.38 m/month Sm Sand Y= 23 kN/m 1.0 1.0 Sand Sand 0.8 Clay H = L. Ch 0.6 Sand' Au,= constant RockAu.- constant 0.4 0.2 10 20 30 40 50 60 70 80 90 Average degree of consolidation, U(%) 0.2 0.4 0.6 APn 08 P. 9.1 0,5 I 2 5 10 1.0 1.2 1.4 1.6 40 50 60 70 80 90 100 U (%) Plot of Ap/Apw against U for various values of Ap/p
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