Geotechnical Engineering 2 Quiz

Questions and Answers

What are the different components of soil?

Mineral particles, organic matter, water, and air.

What are the different weight and volume relationship parameters in determining the soil unit weight?

Bulk density, particle density, water content.

What are the different types of soil unit weight?

Dry unit weight, saturated unit weight, submerged unit weight.

What might be the impact of layers of soil in total weight?

The total weight increases with the number and density of layers, affecting stability and load-bearing capacity. Signup and view all the answers

What is the required height of water inside the cut in order to ensure a factor of safety of 1.5?

3 m Signup and view all the answers

What is the rate of upward seepage of water given H1 = 0.91 m, H2 = 1.37 m, h = 0.46 m, and k = 0.16 cm/sec?

0.019 m3/min Signup and view all the answers

What is the effective stress at point C using the given parameters?

3.811 kPa Signup and view all the answers

What is the moisture content of the stiff saturated clay in Practice Problem 1?

15% Signup and view all the answers

In Practice Problem 2, will boiling occur when h = 1.5 m?

Not specified Signup and view all the answers

What is the critical value of h to cause boiling in Practice Problem 2?

Not specified Signup and view all the answers

In the absence of seepage, the force on a volume of soil is given by P' = ____

zγ'A Signup and view all the answers

The seepage force is calculated as P1' - P2' = ____

γwiA Signup and view all the answers

What is the concept of effective stress in soil mechanics?

The concept of effective stress refers to the stress that contributes to the strength of the soil, accounting for factors such as pore water pressure. Signup and view all the answers

What methods can be applied to estimate soil compressibility?

Methods to estimate soil compressibility include laboratory tests such as oedometer tests and field tests like pressuremeter tests. Signup and view all the answers

What is the primary focus of Module 5?

Module 5 focuses on the shear strength of soil and the parameters used to analyze soil stability problems. Signup and view all the answers

Which loading types are included in the analysis of soil stress increase?

All of the above Signup and view all the answers

The distance learning environment should be treated similarly to a physical classroom.

True Signup and view all the answers

It is encouraged to ask repeated questions that have already been answered.

False Signup and view all the answers

List some applications of the institutional Google Suite required for the course.

Google Classroom, Google Drive, Google Meet. Signup and view all the answers

The course is designed to ensure students demonstrate _______ at the end of the semester.

proficiency Signup and view all the answers

What is the purpose of the 5E Instructional Model used in the course?

The 5E Instructional Model is designed to help students build understanding through engagement, exploration, explanation, elaboration, and evaluation. Signup and view all the answers

What does total stress, σ, include?

Weight of soil solids Signup and view all the answers

What is the equation for total stress?

σ = Σ(γH) Signup and view all the answers

Effective Soil Unit Weight, γ’ = γsat - ______

γw Signup and view all the answers

The effective stress increases when the groundwater table rises.

False Signup and view all the answers

What happens to effective stress if pore water pressure increases?

Effective stress decreases. Signup and view all the answers

Match the terms with their definitions:

Effective Stress = Stress that contributes to soil strength Pore Water Pressure = Pressure exerted by water in the soil voids Total Stress = Sum of effective stress and pore water pressure Unit Weight = Weight of soil per unit volume Signup and view all the answers

What is the critical condition for soil stability regarding effective stress?

Effective stress is equal to zero Signup and view all the answers

What can be done to prevent heaving in saturated soil?

Lower the groundwater table. Signup and view all the answers

The factor of safety, Fs, is calculated using the formula Fs = σ / ______

u Signup and view all the answers

Under which condition does effective stress decrease?

Upward seepage Signup and view all the answers

In a soil profile with downward seepage, the effective stress increases.

True Signup and view all the answers

Study Notes

Course Overview: GEOTECHNICAL ENGINEERING 2

The course enables students to identify and determine stresses, settlement, and shear strength of soil in design parameters.
The course is divided into 5 modules: In Situ Stresses, Normal and Shear Stresses on a Plane, Stresses in a Soil Mass, Compressibility of Soil, and Shear Strength of Soil.

Course Learning Outcomes

Calculate stresses transferred to underlying soils applied by super structural loads.
Apply different methods to estimate compressibility and settlement of soils for shallow foundations.
Demonstrate proficiency in conducting methods and procedures in determining soil shear strength and interpreting data.

Course Study Guide

Modules were prepared for diligent, intelligent, and independent learning.
Self-discipline and time management skills are essential for success.
Mastering technologies and procedures required in the delivery and feedback of the course is important.

Course Guide and House Rules

1. Manage Your Minutes

Create a study routine and stick to it.
Set schedules and deadlines, and prioritize learning.

2. Mind Your Manners

Treat the distance learning environment as an academic space.
Avoid asking questions already answered in lessons or instructions.
Practice electronic conversation etiquette in group chats, open forums, and similar electronic venues.

3. Master the Medium

Learn to use the institutional Google Suite account.
Familiarize yourself with Google Classroom, Google Drive, and Google Meet.
Develop skills in video recording and submission.

4. Make Masterpieces

Go beyond minimum requirements.
Quality of work reflects thought and care put into the process.

5. Connect Constantly

Keep informed and updated on learning materials, instructions, requirements, and feedback.
Use online and offline modes to stay in touch.

6. Observe Originality

Submit electronic work with a highly traceable digital footprint.
Cite sources properly for referenced statements.

7. Instigate Independence

Focus on individual competence.
Learn as much as possible from the course as an individual.

8. Respect the Routine

Be mindful of universally accepted norms of courtesy attached to regular schedules of personal and family time.
Refrain from communication between 8:30 PM and 7:30 AM every day and the whole day on Sundays and official holidays.

9. Finish the Five

The modules are designed based on the 5E Instructional Model (Engage, Explore, Explain, Elaborate, and Evaluate).
Use icons to identify critical areas in the units of the learning modules.### Course Overview
The course is divided into five modules: In Situ Stresses, Normal and Shear Stresses on a Plane, Stresses in a Soil Mass, Compressibility of Soil, and Shear Strength of Soil
Each module has specific learning outcomes, activities, and assessment questions

Study Schedule

Module 1: In Situ Stresses (August 19-September 16, 2020)
- Topics: Distribution of stress throughout an identified cross-section of soil, concept of effective stress, and its application in different site scenarios
- Activities: Engage, Explore, Explain, Elaborate, and Evaluate
Module 2: Normal and Shear Stresses on a Plane (September 17-24, 2020)
- Topics: Normal and shear stresses on a plane, pole method, Mohr's Circle
- Activities: Engage, Explore, Explain, Elaborate, and Evaluate
Module 3: Stresses in a Soil Mass (September 25-October 3, 2020)
- Topics: Increase in vertical stress due to application of various loadings, stresses caused by point load, vertical stress caused by a vertical and horizontal line load
- Activities: Engage, Explore, Explain, Elaborate, and Evaluate
Module 4: Compressibility of Soil (October 5-November 9, 2020)
- Topics: Settlement due to stress increase caused by additional loads, elastic settlement, primary consolidation settlement
- Activities: Engage, Explore, Explain, Elaborate, and Evaluate
Module 5: Shear Strength of Soil (November 19-December 2, 2020)
- Topics: Shear resistance parameters of soils, Mohr-Coulomb failure criterion, direct shear test, triaxial test, unconfined compression test
- Activities: Engage, Explore, Explain, Elaborate, and Evaluate
Summative Assessments: Prelim Quiz, Prelim Examination, Midterm Quiz, Midterm Examination, Final Quiz, and Final Examination

Evaluation

To pass the course, students must:
- Read all course readings and answer pre-assessment quizzes, self-assessment activities, and problem sets
- Submit two graded quizzes for midterms and finals
- Take the Midterm and Final Examination

Assessment Activities

Formative Assessment: Self-assessment activities and problem sets to enhance and deepen understanding of the course
Summative Assessment: Quizzes, Midterm and Final Examinations to evaluate student learning

Technological Tools

Software applications required: Word Processing, Presentation, Publication, and Spreadsheet
Feedback system: Text messaging
Communication: FB account/messenger, e-mails, and cellphone### Module 1: In-Situ Stresses (On-Site Stresses)
Total vertical stress for saturated soil (no seepage) is explained in Unit 1
Stresses in saturated soil with seepage are discussed in Unit 2
Seepage force is covered in Unit 3
Heaving in soil due to flow around sheet piles is discussed in Unit 4
Capillary rise in soils is covered in Unit 5

Module 2: Normal and Shear Stresses on a Plane

Stress equations are explained in Unit 1
Mohr's Circle is discussed in Unit 2
Pole method is covered in Unit 3

Module 3: Stresses in a Soil Mass

Stresses caused by point load are explained in Unit 1
Vertical stress caused by a vertical line load is discussed in Unit 2
Vertical stress caused by a horizontal line load is covered in Unit 3
Vertical stress caused by a vertical strip load (finite width and infinite length) is discussed in Unit 4
Linearly increasing vertical loading on an infinite strip is covered in Unit 5
Vertical stress due to embankment loading is discussed in Unit 6
Vertical stress below the center of a uniformly loaded circular area is covered in Unit 7
Vertical stress at any point below a uniformly loaded circular area is discussed in Unit 8
Vertical stress caused by a rectangular loaded area is covered in Unit 9
Vertical stress below the center of a rectangular loaded area is discussed in Unit 10
Influence chart for vertical pressure (Newmark's Chart) is covered in Unit 11

Module 4: Compressibility of Soil

Settlement is explained in Unit 1
Elastic settlement (Se) is discussed in Unit 2
Fundamentals of consolidation are covered in Unit 3
Primary consolidation (Sc) is discussed in Unit 4
Secondary consolidation (Ss) is covered in Unit 5
Time rate of consolidation is discussed in Unit 6

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Description

This quiz covers the concepts of geotechnical engineering, including properties and exclusivity. It's a part of the CE 422 course in the Civil and Geodetic Engineering Department.