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b) For h 150 mm, 175 ml of water was collected in 15 minutes. Find the 15% followings. 4) i) Soil permeability. ii) Effective vertical stress at A which is a point exists 220 mm below the top of the sample. See the flow net shown in Fig. Q4 for analysing the seepage beneath the concrete dam. 5 m H=3m 08m 12 m R 3 m 교 Datum TH=0 m Fig. Q 4 a) Compute the flow rate through the soil beneath the concrete dam. Consider 10% the soil permeability as 3.2 * 104cm/s. b) Compute the pore water pressures at points A, B, and C. 15% End of Question Paper 3 1) a) List two permeability determination methods (permeability tests) in a 5% laboratory. b) Discuss the applicability of each of the test method listed in part a above. 8% c) Discuss the effect of particle size and particle size distributions (poorly 12% graded, well graded etc) on permeability. 2) a) Drawing a flow net is a commonly used seepage solution methods to estimate 5% the flow rate beneath a dam structure. List another two possible seepage solution methods that can be used to estimate the flow rate beneath a dam. 3) b) List advantages and disadvantages of the flow net solution method compared 10% to the other methods mentioned in part a above. c) Discuss the significance of estimating the exit hydraulic gradient accurately 10% for a dam seepage analysis. Water flows through a 100 mm diameter granular soil specimen as shown below in Fig Q3. The water level on both sides are maintained constant during the test. The void ratio (e) and the specific gravity of the soil are 0.82 and 2.68, respectively. a) 200 mm 650 mm Fig. Q 3 Find the maximum possible value for total head difference (h) such that the 10% soil does not reach quick condition (boiling). Hint: ic = G - 1 + e 1 2

b) For h 150 mm, 175 ml of water was collected in 15 minutes. Find the 15% followings. 4) i) Soil permeability. ii) Effective vertical stress at A which is a point exists 220 mm below the top of the sample. See the flow net shown in Fig. Q4 for analysing the seepage beneath the concrete dam. 5 m H=3m 08m 12 m R 3 m 교 Datum TH=0 m Fig. Q 4 a) Compute the flow rate through the soil beneath the concrete dam. Consider 10% the soil permeability as 3.2 * 104cm/s. b) Compute the pore water pressures at points A, B, and C. 15% End of Question Paper 3 1) a) List two permeability determination methods (permeability tests) in a 5% laboratory. b) Discuss the applicability of each of the test method listed in part a above. 8% c) Discuss the effect of particle size and particle size distributions (poorly 12% graded, well graded etc) on permeability. 2) a) Drawing a flow net is a commonly used seepage solution methods to estimate 5% the flow rate beneath a dam structure. List another two possible seepage solution methods that can be used to estimate the flow rate beneath a dam. 3) b) List advantages and disadvantages of the flow net solution method compared 10% to the other methods mentioned in part a above. c) Discuss the significance of estimating the exit hydraulic gradient accurately 10% for a dam seepage analysis. Water flows through a 100 mm diameter granular soil specimen as shown below in Fig Q3. The water level on both sides are maintained constant during the test. The void ratio (e) and the specific gravity of the soil are 0.82 and 2.68, respectively. a) 200 mm 650 mm Fig. Q 3 Find the maximum possible value for total head difference (h) such that the 10% soil does not reach quick condition (boiling). Hint: ic = G - 1 + e 1 2

Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter2: Origin Of Soil And Grain Size
Section: Chapter Questions
Problem 2.14P: A hydrometer test has the following result: Gs = 2.65, temperature of water = 26 C, and L = 10.4 cm...
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b) For h 150 mm, 175 ml of water was collected in 15 minutes. Find the 15% followings. 4) i) Soil permeability. ii) Effective vertical stress at A which is a point exists 220 mm below the top of the sample. See the flow net shown in Fig. Q4 for analysing the seepage beneath the concrete dam. 5 m H=3m 08m 12 m R 3 m 교 Datum TH=0 m Fig. Q 4 a) Compute the flow rate through the soil beneath the concrete dam. Consider 10% the soil permeability as 3.2 * 104cm/s. b) Compute the pore water pressures at points A, B, and C. 15% End of Question Paper 3
Transcribed Image Text:b) For h 150 mm, 175 ml of water was collected in 15 minutes. Find the 15% followings. 4) i) Soil permeability. ii) Effective vertical stress at A which is a point exists 220 mm below the top of the sample. See the flow net shown in Fig. Q4 for analysing the seepage beneath the concrete dam. 5 m H=3m 08m 12 m R 3 m 교 Datum TH=0 m Fig. Q 4 a) Compute the flow rate through the soil beneath the concrete dam. Consider 10% the soil permeability as 3.2 * 104cm/s. b) Compute the pore water pressures at points A, B, and C. 15% End of Question Paper 3
1) a) List two permeability determination methods (permeability tests) in a 5% laboratory. b) Discuss the applicability of each of the test method listed in part a above. 8% c) Discuss the effect of particle size and particle size distributions (poorly 12% graded, well graded etc) on permeability. 2) a) Drawing a flow net is a commonly used seepage solution methods to estimate 5% the flow rate beneath a dam structure. List another two possible seepage solution methods that can be used to estimate the flow rate beneath a dam. 3) b) List advantages and disadvantages of the flow net solution method compared 10% to the other methods mentioned in part a above. c) Discuss the significance of estimating the exit hydraulic gradient accurately 10% for a dam seepage analysis. Water flows through a 100 mm diameter granular soil specimen as shown below in Fig Q3. The water level on both sides are maintained constant during the test. The void ratio (e) and the specific gravity of the soil are 0.82 and 2.68, respectively. a) 200 mm 650 mm Fig. Q 3 Find the maximum possible value for total head difference (h) such that the 10% soil does not reach quick condition (boiling). Hint: ic = G - 1 + e 1 2
Transcribed Image Text:1) a) List two permeability determination methods (permeability tests) in a 5% laboratory. b) Discuss the applicability of each of the test method listed in part a above. 8% c) Discuss the effect of particle size and particle size distributions (poorly 12% graded, well graded etc) on permeability. 2) a) Drawing a flow net is a commonly used seepage solution methods to estimate 5% the flow rate beneath a dam structure. List another two possible seepage solution methods that can be used to estimate the flow rate beneath a dam. 3) b) List advantages and disadvantages of the flow net solution method compared 10% to the other methods mentioned in part a above. c) Discuss the significance of estimating the exit hydraulic gradient accurately 10% for a dam seepage analysis. Water flows through a 100 mm diameter granular soil specimen as shown below in Fig Q3. The water level on both sides are maintained constant during the test. The void ratio (e) and the specific gravity of the soil are 0.82 and 2.68, respectively. a) 200 mm 650 mm Fig. Q 3 Find the maximum possible value for total head difference (h) such that the 10% soil does not reach quick condition (boiling). Hint: ic = G - 1 + e 1 2
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