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3) A geotechnical analysis of a building site reveals that 5 m thick clay layer is...
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...
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...
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 water table is at a depth of 2 m below the ground surface. The sand has a dry unit weight of 16 kN/m3 and a saturated unit weight of 18 kN/m3. The capillary rise in the sand is 0.5 m. The clay has a bulk unit weight of 19 kN/m3....
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...
Example 2:3 The soil profile at a site consists of a 3 m thick sand layer...
Example 2:3 The soil profile at a site consists of a 3 m thick sand layer (Ybulk -16.5 kN/m3 sat18.5 kN/m3) underlain by a 6 m thick clay layer (w-27%, Gs-270, m,-0.31 MPa", cv-2.6 m2/year), which is underlain by a gravel layer. A 3 m compacted fill with a unit weight of 20 kN/m3 is to be placed at ground level. a. What would be the final consolidation settlement? b. How long will it take for 50 mm of consolidation...
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...
You are evaluating the geotechnical characteristics of a Miami site for a proposed office buildin...
You are evaluating the geotechnical characteristics of a Miami site for a proposed office building. Subsurface investigation showed that the site consists of the following layers: (1) a 5-ft sandy laver with a unit weight of 100 pcf (2) a 10-ft silty sand layer with a saturated unit weight of 115 pcf. (3) a 20-ft saturated clay layer with a unit weight of 118 pef, void ratio of 0.85, and underlain by gravels. The site seemed to have strong potential...
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...
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,
1. A 15 foot thick doubly drained layer of saturated clay under a surcharge loading underwent...
1. A 15 foot thick doubly drained layer of saturated clay under a surcharge loading underwent 90% primary consolidation in 120 days. The laboratory test's specimen will have two-way drainage a. Find the coefficient of consolidation for the pressure range b. For a 1.5 inch thick undisturbed clay specimen, how long will it take to undergo 90% consolidation in the laboratory for a similar pressure range?
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...
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...
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...
Example 2:3 The soil profile at a site consists of a 3 m thick sand layer (Ybulk -16.5 kN/m3 sat18.5 kN/m3) underlain by a 6 m thick clay layer (w-27%, Gs-270, m,-0.31 MPa", cv-2.6 m2/year), which is underlain by a gravel layer. A 3 m compacted fill with a unit weight of 20 kN/m3 is to be placed at ground level. a. What would be the final consolidation settlement? b. How long will it take for 50 mm of consolidation...
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...
You are evaluating the geotechnical characteristics of a Miami site for a proposed office building. Subsurface investigation showed that the site consists of the following layers: (1) a 5-ft sandy laver with a unit weight of 100 pcf (2) a 10-ft silty sand layer with a saturated unit weight of 115 pcf. (3) a 20-ft saturated clay layer with a unit weight of 118 pef, void ratio of 0.85, and underlain by gravels. The site seemed to have strong potential...
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...
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,
1. A 15 foot thick doubly drained layer of saturated clay under a surcharge loading underwent 90% primary consolidation in 120 days. The laboratory test's specimen will have two-way drainage a. Find the coefficient of consolidation for the pressure range b. For a 1.5 inch thick undisturbed clay specimen, how long will it take to undergo 90% consolidation in the laboratory for a similar pressure range?
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