g=9.81m/s^2
When it say "preconsolidated under vertical effective stress of 130 kPa", this means that the preconsolidation pressure at the centre of the clay layer is 130 kPa, NOT that 130 kPa was applied as a surcharge at the surface.
Homework Answers
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g=9.81m/s^2
When it say "preconsolidated under vertical effective stress of
130 kPa", this means that the...
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...
2. A future development site is to be preloaded with a 310 kPa surface surcharge to reduce potent...
2. A future development site is to be preloaded with a 310 kPa surface surcharge to reduce potential settlements in a 12.5-m thick soft clay layer. The soft clay is overlain by a 3-m thick sand layer and underlain by permeable bedrock. The groundwater table is at the sand-clay interface. A sample of the soft clay was extracted from a depth of 9 m and a 1D consolidation and compression test was conducted. Compression data obtained from the test are...
A 5m wide and 10m long rectangular foundation is built on a site where the soil...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Problem 4: a) Calculate the total overburden, effective stress and pore pressure distribution for the soil...
Problem 4: a) Calculate the total overburden, effective stress and pore pressure distribution for the soil profile below. Neglect the surcharge for this analysis. Draw out all pressure profiles in a neat manner using a ruler. NO sketches and sloppy drawings permitted. b) Calculate the change in pressure if the water table rises to the interface of the clayey/sandy soil layers. You may show your results graphically or report the change in pressures along with the new pressures at the...
A 5m wide and 10m long rectangular foundation is built on a site where the soil...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Figure 8. The foundation carries a surcharge loading of q=65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Deadline: 4pm, Thursday, Oct 10. Hand in the submission electronically in DOC, PDF, or JPEG format)...
Deadline: 4pm, Thursday, Oct 10. Hand in the submission electronically in DOC, PDF, or JPEG format) through MyUni Assignment online portal. Late submissions penalised 5% per day. Plagiarism will be penalised severely. 1. (10 marks): This tutorial continues Tutorial No. 4. The soil profile for proposed roadway construction is represented in Figure 1. A soil sample was recovered at A, and was tested in an oedometer device. The test results are provided in Table 1. The void ratio of the...
Hello, I want to know how to calculate the vertical stress induced in each layer if...
Hello, I want to know how to calculate the vertical stress induced in each layer if it is a continuous foundation?Example 7.4 The allowable settlement for the proposed continuous footing in Figure 7.9 is 25 mm. Using the classical method, compute its settlement and determine if it satisfies this criterion. Solution P- PD Pt 40 kN/m + 25 kN/m -65 kN/m w/b = (1.2 m)(0.5 m)(23.6 kN/㎡) = 14 kN/m 65 kN/m + 14 kN/m 1.2 m - 0 66...
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...
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...
2. A future development site is to be preloaded with a 310 kPa surface surcharge to reduce potential settlements in a 12.5-m thick soft clay layer. The soft clay is overlain by a 3-m thick sand layer and underlain by permeable bedrock. The groundwater table is at the sand-clay interface. A sample of the soft clay was extracted from a depth of 9 m and a 1D consolidation and compression test was conducted. Compression data obtained from the test are...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Problem 4: a) Calculate the total overburden, effective stress and pore pressure distribution for the soil profile below. Neglect the surcharge for this analysis. Draw out all pressure profiles in a neat manner using a ruler. NO sketches and sloppy drawings permitted. b) Calculate the change in pressure if the water table rises to the interface of the clayey/sandy soil layers. You may show your results graphically or report the change in pressures along with the new pressures at the...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Figure 8. The foundation carries a surcharge loading of q=65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
Deadline: 4pm, Thursday, Oct 10. Hand in the submission electronically in DOC, PDF, or JPEG format) through MyUni Assignment online portal. Late submissions penalised 5% per day. Plagiarism will be penalised severely. 1. (10 marks): This tutorial continues Tutorial No. 4. The soil profile for proposed roadway construction is represented in Figure 1. A soil sample was recovered at A, and was tested in an oedometer device. The test results are provided in Table 1. The void ratio of the...
Hello, I want to know how to calculate the vertical stress induced in each layer if it is a continuous foundation?Example 7.4 The allowable settlement for the proposed continuous footing in Figure 7.9 is 25 mm. Using the classical method, compute its settlement and determine if it satisfies this criterion. Solution P- PD Pt 40 kN/m + 25 kN/m -65 kN/m w/b = (1.2 m)(0.5 m)(23.6 kN/㎡) = 14 kN/m 65 kN/m + 14 kN/m 1.2 m - 0 66...
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...
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