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TOTAL CONSOLIDATION SETLEMENT Example 1: if the initial void ratio of a clay is e. =...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 1...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
The following are the results (in kPa) of a consolidation test for a clay with a...
The following are the results (in kPa) of a consolidation test for a clay with a current effective stress of 400 kN/m². Calculate the primary consolidation settlement of the 5-m thick layer if the initial void ratio is 1 and the increase in the overburden pressure is 400 kPa. (Hint: max curvature at 150 kPa) log o' 1.21 1.195 1.15 1.05 0.97 500 0.85 0.6 1000 2000 0.2 1000 500 0.28 0.36 0.42 300 0.82m 0.68m 0.94m
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock;...
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock; a 20-m thick layer of sandy soil is placed on top of the clay to expedite consolidation process. The unit weight of the sand is 15 kN/m3 and the unit weight of the clay is 10 kN/m3. For the clay layer, the initial void ratio is 2.0, the compression index of the clay is Ce 0.40, the recompression index is C, - 0.10, and...
geotechnical engineering The soil profile at a site consists of a clay layer 10 m thick,...
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
7) (Total 20 pts) The figure shows a 20 m thick layer of normally consolidated clay...
7) (Total 20 pts) The figure shows a 20 m thick layer of normally consolidated clay (Y -18.6 kN/m3) that is one-dimensionally loaded by Δσ,-50kPa. The clay layer is below a 3 m thick layer of granular fill (y = 19.6 kN/m3), and a dense, compacted glacial till (impermeable) underlies the clay. The water table is located at the top of the clay layer. A 1-D consolidation test is performed on a 2.20 cm thick, doubly drained specimen from the...
A 2-m clay layer (e = 0.92, G = 2,72. Cc = 1/3) is overlain with...
A 2-m clay layer (e = 0.92, G = 2,72. Cc = 1/3) is overlain with 3-m thick of sand layer (e =05, G = 2.62, w = 0). The water table is 15 m bel the ground (sand) surface. If a 3-m thick land fill (r = 17.3 kN/m2) is placed over the existing ground surface, compute the consolidation settlement in mm of the clay layer. (The clay is normally consolidated; final answer should be rounded-off to one decimal...
1. (25 points) The soil profile at a site consists of a layer of fine sand...
1. (25 points) The soil profile at a site consists of a layer of fine sand 5 m thick above a layer of clay 4 m thick. Below the clay is a layer of impermeable rock. The groundwater table was observed at 2 m below ground level. The unit weight of the sand above and below the water table is 20 KN/m'. The water content of the clay is 25% and its dry unit weight is 15 KN/m'. The compression...
soil Q1) An oedometer test was performed on a 2 cm thick clay sample drained on...
soil
Q1) An oedometer test was performed on a 2 cm thick clay sample drained on both sides taken from the mid clay layer shown below, after 10 minutes 50% consolidation is reached . a) How long time in days would the same degree of consolidation(50%) be reached in the field ?. b) How much the Final settlement would be reached in the clay layer.? c) How much the preconsolidation pressure of a specimen. ? 3m 2m Sand surcharge Y...
soil mechanics Q1) An oedometer test was performed on a 2 cm thick clay sample drained...
soil mechanics
Q1) An oedometer test was performed on a 2 cm thick clay sample drained on both sides taken from the mid clay layer shown below, after 10 minutes 50% consolidation is reached. a) How long time in days would the same degree of consolidation(50%) be reached in the field ? b) How much the final settlement would be reached in the clay layer.? c) How much the preconsolidation pressure of a specimen. ? Sm 2m Sand surcharge y...
Question 5 (20 marks) A I-m thick, c applied on the top surface of the clay using Sheepsfoot rollers t Ily-saturate...
Question 5 (20 marks) A I-m thick, c applied on the top surface of the clay using Sheepsfoot rollers t Ily-saturated clay is resting on a dry sand when a uniform load of 200 kN/m2 is expedite consolidation process For the saturated clay layer, the initial void ratio of 5.0, specific gravity of 2.65, pre-consolidation ression index of 0.2, and the stress of 20 kN/m2: the compression index of 0.5, the recomp coefficient of consolidation of 0.001 cm2 s" a)...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
The following are the results (in kPa) of a consolidation test for a clay with a current effective stress of 400 kN/m². Calculate the primary consolidation settlement of the 5-m thick layer if the initial void ratio is 1 and the increase in the overburden pressure is 400 kPa. (Hint: max curvature at 150 kPa) log o' 1.21 1.195 1.15 1.05 0.97 500 0.85 0.6 1000 2000 0.2 1000 500 0.28 0.36 0.42 300 0.82m 0.68m 0.94m
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock; a 20-m thick layer of sandy soil is placed on top of the clay to expedite consolidation process. The unit weight of the sand is 15 kN/m3 and the unit weight of the clay is 10 kN/m3. For the clay layer, the initial void ratio is 2.0, the compression index of the clay is Ce 0.40, the recompression index is C, - 0.10, and...
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
7) (Total 20 pts) The figure shows a 20 m thick layer of normally consolidated clay (Y -18.6 kN/m3) that is one-dimensionally loaded by Δσ,-50kPa. The clay layer is below a 3 m thick layer of granular fill (y = 19.6 kN/m3), and a dense, compacted glacial till (impermeable) underlies the clay. The water table is located at the top of the clay layer. A 1-D consolidation test is performed on a 2.20 cm thick, doubly drained specimen from the...
A 2-m clay layer (e = 0.92, G = 2,72. Cc = 1/3) is overlain with 3-m thick of sand layer (e =05, G = 2.62, w = 0). The water table is 15 m bel the ground (sand) surface. If a 3-m thick land fill (r = 17.3 kN/m2) is placed over the existing ground surface, compute the consolidation settlement in mm of the clay layer. (The clay is normally consolidated; final answer should be rounded-off to one decimal...
1. (25 points) The soil profile at a site consists of a layer of fine sand 5 m thick above a layer of clay 4 m thick. Below the clay is a layer of impermeable rock. The groundwater table was observed at 2 m below ground level. The unit weight of the sand above and below the water table is 20 KN/m'. The water content of the clay is 25% and its dry unit weight is 15 KN/m'. The compression...
soil
Q1) An oedometer test was performed on a 2 cm thick clay sample drained on both sides taken from the mid clay layer shown below, after 10 minutes 50% consolidation is reached . a) How long time in days would the same degree of consolidation(50%) be reached in the field ?. b) How much the Final settlement would be reached in the clay layer.? c) How much the preconsolidation pressure of a specimen. ? 3m 2m Sand surcharge Y...
soil mechanics
Q1) An oedometer test was performed on a 2 cm thick clay sample drained on both sides taken from the mid clay layer shown below, after 10 minutes 50% consolidation is reached. a) How long time in days would the same degree of consolidation(50%) be reached in the field ? b) How much the final settlement would be reached in the clay layer.? c) How much the preconsolidation pressure of a specimen. ? Sm 2m Sand surcharge y...
Question 5 (20 marks) A I-m thick, c applied on the top surface of the clay using Sheepsfoot rollers t Ily-saturated clay is resting on a dry sand when a uniform load of 200 kN/m2 is expedite consolidation process For the saturated clay layer, the initial void ratio of 5.0, specific gravity of 2.65, pre-consolidation ression index of 0.2, and the stress of 20 kN/m2: the compression index of 0.5, the recomp coefficient of consolidation of 0.001 cm2 s" a)...
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