Podcast Beta
Questions and Answers
What is the decrease in void ratio of a 10-m thick layer of soft clay under a compressive load?
What is the primary factor affecting the consolidation of a clay layer?
What is the unit weight of a soil with a dry unit weight of 15.5 kN/m³ and a moisture content of 20%?
What is the reduction in thickness of a 10-m thick layer of soft clay when the void ratio decreases by one-half?
Signup and view all the answers
What is the plastic settlement of a layer of plastic clay with an initial intergranular pressure of 200 kPa, an increase in intergranular pressure of 120 kPa, and a coefficient of consolidation of 0.315?
Signup and view all the answers
What is the void ratio of a soil specimen with a moisture content of 50%, a degree of saturation of 90%, and a specific gravity of soil solids of 2.67?
Signup and view all the answers
What is the reduction in thickness of the clay layer, in meters, when the void ratio decreases by one-half?
Signup and view all the answers
A layer of plastic clay is subjected to an increase in intergranular pressure of 120 kPa. What is the resulting plastic settlement?
Signup and view all the answers
What is the void ratio of a soil specimen with a moisture content of 50%, a degree of saturation of 90%, and a specific gravity of soil solids of 2.67?
Signup and view all the answers
A certain soil has a dry unit weight of 15.5 kN/m³. What is the unit weight of the soil when water is added to a moisture content of 20%?
Signup and view all the answers
What is the effect on the thickness of a clay layer when it is subjected to a compressive load?
Signup and view all the answers
Study Notes
Soil Mechanics: Refresher Set 02
Compression of Soft Clay
- A 10-m thick layer of soft clay with an initial void ratio of 1.2 undergoes compression, resulting in a decrease in void ratio by one-half.
- This compression reduces the layer thickness by 2.73 meters.
Consolidation of Plastic Clay
- A layer of plastic clay is subjected to an initial intergranular pressure of 200 kPa, which increases by 120 kPa.
- The clay layer is 8 m thick, with a coefficient of consolidation of 0.315 and a void ratio of 1.125.
- The plastic settlement of the clay layer is 0.563.
Soil Properties
- A soil specimen has a moisture content of 50%, a degree of saturation of 90%, and a specific gravity of soil solids of 2.67.
- The void ratio of the soil specimen is 1.12.
Unit Weight of Soil
- A soil has a dry unit weight of 15.5 kN/m³.
- When water is added to a moisture content of 20%, the unit weight of the soil increases to 18.6 kN/m³.
Soil Mechanics
- A 10-m thick layer of soft clay with an initial void ratio of 1.2 reduces by half under a compressive load, resulting in a reduction of 2.37 m in thickness.
- The volume of the layer decreases by half, which means the layer thickness also decreases by half.
Consolidation of Clay
- A layer of plastic clay is subjected to an initial intergranular pressure of 200 kPa and an increase of 120 kPa, resulting in a plastic settlement of 0.365 m.
- The coefficient of consolidation is 0.315, and the initial void ratio is 1.125.
- The thickness of the clay layer is 8 m.
Void Ratio Calculation
- A soil specimen with a moisture content of 50%, a degree of saturation of 90%, and a specific gravity of soil solids of 2.67 has a void ratio of 1.12.
- The formula to calculate the void ratio is based on the given moisture content, degree of saturation, and specific gravity of soil solids.
Unit Weight Calculation
- A soil with a dry unit weight of 15.5 kN/m³ has a unit weight of 18.6 kN/m³ when water is added to a moisture content of 20%.
- The formula to calculate the unit weight is based on the given dry unit weight and moisture content.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Practice questions for the Civil Engineer Board Examination, focusing on soil mechanics and compression of clay layers. Review principles, techniques, and shortcuts for the exam.
