A clay layer (double drainage) of 20m thickness showed 10mm settlement after 200 days. What is...
A clay layer (double drainage) of 20m thickness showed 10mm settlement after 200 days. What is the degree of consolidation of clay soon after load applied ?
(a) 50% (b) 0% (c) 100% (d) 25%
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A clay layer (double drainage) of 20m thickness showed 10mm
settlement after 200 days. What is...
Geotechnical engineering 2 Q3. A double drained clay layer of 3.5 m thickness is subjected to...
Geotechnical engineering 2
Q3. A double drained clay layer of 3.5 m thickness is subjected to loading that increases the average effective vertical stress from 250 kN/m2 to 390 kN/m2, assuming my 1.7 x 10 m2/kN and Cy-0.75 m2year, determine i. The ultimate consolidation settlement ii. The settlement at the end of 1.5 years, The time in days for 30% consolidation,
A new foundation will be built on a 2.5m thick clay layer. The current effective stress in the middle of the clay layer was found to be 200 kPa. During construction, the foundation area will be h...
A new foundation will be built on a 2.5m thick clay layer. The current effective stress in the middle of the clay layer was found to be 200 kPa. During construction, the foundation area will be heavily loaded with the structure and equipment so that effective stress at the middle of the clay layer will be increased to 800 kPa. After construction is completed, which will take 5 years, the equipment will be removed and the final effective stress in...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
The ground profile of a construction site consists of a 3 m thick layer of sand...
The ground profile of a construction site consists of a 3 m thick layer of sand followed by a 2 m thick layer of clay lying on impervious bedrock. The watertable is at a depth of 2 m below the ground surface. The sand has a dry unit weight of 16 kN/m and a saturated unit weight of 18 kN/m3. The capillary rise in sand is 0.5 m. The clay has a bulk unit weight of 19 kN/m 1. One...
Net load Problem 1: With the foundation load of 500 kips given, determine: a) the average stress ...
net load Problem 1: With the foundation load of 500 kips given, determine: a) the average stress increase in the clay layer below the center of the foundation using m&n method Sand 4.5 Groundwater b) Consolidation settlement at Point A and Point B c) Differential Settlement 4 ftx4 ft table Sand sal d) The average degree of consolidation (U%) of Point A when the consolidation settlement is 0.5" ,-I 20 lb/ft3 C0.01 ft /day 10ftCe 0.25 e) Consolidation settlement (St)...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft of 1000 2000 3000 4000 sand. The base of the clay layer lies over an impervious siltstone bedrock. Water table is at ground surface and is hydrostatic in the clay layer. The initial vertical effective stress do'and maximum past pressure profiles with depth are plotted in the Figure to the right. Initial void ratio e, -0.95. One- dimensional consolidation test results yielded the following:...
solve Question 8. please show steps [Problems 7-8] A 12 m thick layer of Omaha clay...
solve Question 8. please show steps
[Problems 7-8] A 12 m thick layer of Omaha clay is double drained. (This means that a very pervious layer compared to the clay exists on top of and under the 12 m clay layer). The coefficient of consolidation is Cy = 8.0 x 10-8 m²/s. Problem 7. Estimate the degree of consolidation for the clay layer 5 years after loading at the depth of 6 m. (1) 32% (2) 46% (3) 61% (4)...
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...
help with problems 1 & 2 please and explain Problem 1 A deposit of Swedish clay...
help with problems 1 & 2 please and explain
Problem 1 A deposit of Swedish clay is 15 m thick drained at both top and bottom. The coefficient of consolidation for the clay layer was estimated to be 1 x 10 cm/sec from laboratory test. The ultimate consolidation settlement (Sc) was calculated under the applied load in the field and was found 80 cm. Find the following: a) How long would it take for settlement of 40 cm and 70...
e3 shows the soil profile (sand-clay-sand) at the site of a warehouse that causes a surface...
e3 shows the soil profile (sand-clay-sand) at the site of a warehouse that causes a surface ding of 100 kPa. (pw= 1000 kg/m; g 9.81 m/s2) on 4 (25 marks) A clay sample was cored at 7 m depth (middle of the clay layer). Based on laboratory test data, it was found that the clay was over-consolidated with OCR = 2.5 (before applying surface loading), compression index Ce 0.44 and recompression index C. = 0.1. The consolidation coefficient of clay...
Geotechnical engineering 2
Q3. A double drained clay layer of 3.5 m thickness is subjected to loading that increases the average effective vertical stress from 250 kN/m2 to 390 kN/m2, assuming my 1.7 x 10 m2/kN and Cy-0.75 m2year, determine i. The ultimate consolidation settlement ii. The settlement at the end of 1.5 years, The time in days for 30% consolidation,
A new foundation will be built on a 2.5m thick clay layer. The current effective stress in the middle of the clay layer was found to be 200 kPa. During construction, the foundation area will be heavily loaded with the structure and equipment so that effective stress at the middle of the clay layer will be increased to 800 kPa. After construction is completed, which will take 5 years, the equipment will be removed and the final effective stress in...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
The ground profile of a construction site consists of a 3 m thick layer of sand followed by a 2 m thick layer of clay lying on impervious bedrock. The watertable is at a depth of 2 m below the ground surface. The sand has a dry unit weight of 16 kN/m and a saturated unit weight of 18 kN/m3. The capillary rise in sand is 0.5 m. The clay has a bulk unit weight of 19 kN/m 1. One...
net load Problem 1: With the foundation load of 500 kips given, determine: a) the average stress increase in the clay layer below the center of the foundation using m&n method Sand 4.5 Groundwater b) Consolidation settlement at Point A and Point B c) Differential Settlement 4 ftx4 ft table Sand sal d) The average degree of consolidation (U%) of Point A when the consolidation settlement is 0.5" ,-I 20 lb/ft3 C0.01 ft /day 10ftCe 0.25 e) Consolidation settlement (St)...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft of 1000 2000 3000 4000 sand. The base of the clay layer lies over an impervious siltstone bedrock. Water table is at ground surface and is hydrostatic in the clay layer. The initial vertical effective stress do'and maximum past pressure profiles with depth are plotted in the Figure to the right. Initial void ratio e, -0.95. One- dimensional consolidation test results yielded the following:...
solve Question 8. please show steps
[Problems 7-8] A 12 m thick layer of Omaha clay is double drained. (This means that a very pervious layer compared to the clay exists on top of and under the 12 m clay layer). The coefficient of consolidation is Cy = 8.0 x 10-8 m²/s. Problem 7. Estimate the degree of consolidation for the clay layer 5 years after loading at the depth of 6 m. (1) 32% (2) 46% (3) 61% (4)...
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...
help with problems 1 & 2 please and explain
Problem 1 A deposit of Swedish clay is 15 m thick drained at both top and bottom. The coefficient of consolidation for the clay layer was estimated to be 1 x 10 cm/sec from laboratory test. The ultimate consolidation settlement (Sc) was calculated under the applied load in the field and was found 80 cm. Find the following: a) How long would it take for settlement of 40 cm and 70...
e3 shows the soil profile (sand-clay-sand) at the site of a warehouse that causes a surface ding of 100 kPa. (pw= 1000 kg/m; g 9.81 m/s2) on 4 (25 marks) A clay sample was cored at 7 m depth (middle of the clay layer). Based on laboratory test data, it was found that the clay was over-consolidated with OCR = 2.5 (before applying surface loading), compression index Ce 0.44 and recompression index C. = 0.1. The consolidation coefficient of clay...
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