CE 354 Geotechnical Engineering

M & W 4:30 p.m. – 5:45 p.m., 1011 EB Fall 2012

Lecturer: Professor Abdolreza Osouli Office: 2065 Engineering Building Phone: 650-2816 e-mail: aosouli@siue.edu Office hours: Monday and Wednesday 3:15 p.m. to 4:15 p.m. or by appointment Website: http://www.ce.siue.edu/354/Main%20354.html Goals: This course is intended to give students a basic understanding of the theoretical

and empirical principles of Geotechnical Engineering (soil/rock mechanics). Soil mechanics consists of the study of soil properties and soil behavior, whereas foundation engineering is the design of foundations on soils and rock. Focus of this course will be on geological formations of natural soils, soil sampling, classification, water influence, effective stress estimation, shear strength, and the estimation of settlement. This course will:

1. Introduce you to the discipline of geotechnical engineering 2. Help you to apply knowledge of mathematics, science, and engineering 3. Help you to appreciate the complex behavior of soil and rock when you

encounter in your projects. At that point, if geotechnical engineering is not your specialty, STOP and seek assistance from a geotechnical engineer.

4. Provide you the analytical background to understand the design principles used in general and also in CE 455, Foundation Design course.

5. Help you to answer some questions you may encounter in your Professional Engineer (PE) exam

6. Help you to use the techniques, skills, and modern engineering tools necessary for engineering practice

Prerequisites: (1) Upper-division CE standing, CE 242, and CE 315 or concurrently enrolled, or

consent of instructor. The concepts learned from CE 242 will be used in learning applied stresses, shear strength and stress-strain relationship of soils. The concepts learned from CE 315, such as flow rate, Bernoulli's equation, hydraulic gradient, etc. will be used to study the section of Water in Soils.

(2) Students should also have the basic knowledge of using Internet browser to acquire class information from CE354 homepage under (http://www.siue.edu/engineering/civilengineering/).

Required Textbook: Braja M. Das, "Principles of Geotechnical Engineering", 7th Edition, Cengage Learning, 2010. Supplementary Recommended Textbook Robert D. Holtz & William D. Kovacs, “An Introduction to Geotechnical Engineering”, Prentice Hall, 1981. Tentative Topics Reading Assignment (Ch.-Sec.) I. Introduction 1-1 to 6 A. Historical Development of Geotechnical Engineering B. Geologic Engineering, Soil Mechanics & 2-1 Geotechnical Engineering C. Origin of Soils II. Soil physical characteristics and classification A. Soil Particles Size and Clay Minerals 2-2 to 4 B. Grain Size Distribution 2-5 to 7 C. Weight-Volume Relationships (Phase Relationships) & Relative Density 3-1 to 6 D. Plasticity and Structure of Soil 4.1 to 8 E. Soil Classification 5-1 to 5 III. Soil Compaction

A. Standard Proctor Test 6.1 to 2 B. Modified Proctor Test 6.3 to 11

Exam #1 IV. Seepage through Soils A. Permeability 7-1 to 7.10 1. Dynamics of fluid flow 2. Darcy’s Law for Flow through Porous Media 3. Soil Permeability & One-dimensional Flow B. 2-D Flow and Flow Net Construction 8-1 to 9 V. Soil Stresses A. Stresses in saturated soil without seepage 9-1 B. Stresses in saturated soil with upward seepage 9-2 C. Stresses in saturated soil with downward seepage 9-3 to 4 Exam #2

VI. Compressibility, Consolidation, and Settlement A. Time-dependent Settlement and Spring Analogy 11-3 B. The Oedometer and Consolidation Testing 11-4 to 11-5 C. Determination of Preconsolidation Pressure 11-6 D. Settlement Computations 11-7 to 11 E. Time Rate of Consolidation 11-12 to 13 Exam #3 VII. Soil Stresses under Loading

A. Normal and Shear Stresses 10.1 B. Stresses Caused by Different Surface Load Configuration

VIII. Soil Shear Strength A. Stress-Strain Relationships & 12-1 Mohr-Coulomb Failure Criteria B. Tests for Determining the Shear Strength of Soils 12-2 to 11 C. Soil behavior under shear Final Exam Course Format Course website: You are required to register on the CE 354 course web site in order to get access to the restricted area. Please follow the instruction on the web site to perform the registration, and contact Mr. Brent Vaughn (bvaughn@siue.edu) if you have problems for registration. Lectures: Lectures begin promptly at 4:30 p.m. and end at 5:45 p.m. You are expected to attend all lectures. Take thorough notes during the lecture, because you are responsible for what is presented verbally as well as textbook. After each lecture you should review your notes and study appropriate readings and work examples in the textbook. Case study of the week: Once a week a team (not more than two students) will be assigned to present a current construction case study highlighting the geotechnical aspects of a project. The team will have to select the project from Engineering News Record (ENR), Civil Engineering, Tunnels and Tunneling, or similar source or an ongoing construction project in the area. The team will prepare a presentation summarizing the geotechnical aspects of the project and how they relate to material presented in class. The presentation will be allotted 10 minutes for presentation and 10 minutes for discussion. A summary of the project (up to maximum two pages) shall be submitted to instructor the night before the presentation day. The team should consult with the instructor prior to making a presentation.

Homework: Homework will be assigned and collected regularly (typically due in one week). The homework assignments will be posted on the course website. The homework grade depends on the number of problems that are turned in by each student (disregarding the correctness of the problems). The assigned teaching assistant has his/her choice to grade your homework for correctness. However, the key for each set of homework will be posted on the course web site after the collection of the homework. Because the teaching assistant may not have enough time to finish grading your homework before an exam, therefore, you are advised to make a duplicate copy of your homework before you turn it in. You are required to turn in your homework on time. However, you are only allowed to turn in your homework late if you get a special permission from the instructor of the course before the due dates. Each day of delay will result in a 20% deduction from the grade of the required homework. Exams: In each exam, you are allowed to bring in your own formula sheet. During the exam, the instructor will check to find out the legitimacy of each formula on the formula sheet. An erasable pencil has to be used to write the formula on the formula sheet so that the instructor can erase any illegitimate information off from the sheet. In the exams you will be asked both qualitative and quantitative questions. The final exam schedule is available at http://www.siue.edu/registrar/schedules/exam_index_sp.shtml. Grades: Although grades may not reflect the extent of your knowledge, they are useful to guide you for further development. You will receive a letter grade according to the standards of this course at the end of the semester. The course standards of accomplishments are:

Points Accomplishment Level Letter Grade 90-100 Superior A (including +/-) 80-89.99 Proficient B (including +/-) 70-79.99 Acceptable C (including +/-) 60-69.99 Mediocre D (including +/-) Below 60 Unacceptable F

The following grade distribution will be applied:

Homework ----- 15 % 3 Exams (75 minutes/ea.) ----- 60 % Final Exam (75 minutes) ----- 15 % Class Participation ----- 10 % ------ Total 100 %

The exact letter grade (+/-) will be adjusted depending on class and individual performance. You are expected to attend all classes, submit all assignments, and sit for all exams. You are required to submit a letter/e-mail explaining your absence from class. A short email note is sufficient.

The class participation portion of the grade will be calculated using the following equation: (class attendance)*25% + (project of the week)*25% + [1 – (# unexcused absences + # of missed

HW)]*50% ≥ 0 For example, if a student has one unexcused absence, 50% is automatically deducted from the class participation grade:

(class participation)*25% + (project of the week)*25% + (1 – 1)*50% ≤ 50% Two or more unexcused absences will result in the loss of the entire class participation grade of 10%. Communications: You should take advantage of the availabilities of the instructor and teaching assistant during office hours or by appointment. You can also correspond using e-mail. I receive many emails per day. Please make sure that in all email correspondence, the subject heading starts with “CE 354:” followed by the topic of the message. This will ensure your email will be placed in appropriate mail box and receive prompt attention. Ethic: Discussion among students of the topics presented in this course for the purpose of increasing their understanding is encouraged. Nevertheless, work used in grading must be the product of the individual. The university regulations are very explicit about academic misconduct and cheating, and these regulations will be enforced. During exams, we will apply a code of honor, under which you are to work alone and neither give nor receive help from any sources. Cheating or plagiarism (see statement below) in any form will not be tolerated. Plagiarism

Deliberate plagiarism is a serious act of academic misconduct. Students may be suspended from the University if they are found to have plagiarized their course work. Whether inadvertent or deliberate, plagiarism includes the following:

(a) word-for-word copying of sentences or whole paragraphs or presenting of

substantial extracts from either paper-based or electronic sources the work or data of others that are published or unpublished (such as books, internal reports, and lecture notes or tapes) without clearly indicating their origin

(b) using very close paraphrasing of sentences or whole paragraphs without due acknowledgement in the form of reference to the original work

(c) submitting another student’s work in whole or in part (d) use of another person’s ideas, work or research data without

acknowledgement (e) copying computer files, algorithms or computer code without clearly

indicating their origin

0

(f) submitting work that has been written by someone else on the student’s behalf

(g) submitting work that has been derived, in whole or in part, from another student’s work by a process of mechanical transformation (e.g., changing variable names in computer programs).

Students with Disabilities Please notify me no later than the end of the first week of class concerning any academic accommodations you will need. You must have a documented disability and an ID CARD from Disability Support Services. If you need accommodations not indicated on the Disability Support Services ID CARD, please contact me or the Disability Support Services office as soon as possible so arrangements can be made for the additional equipment or accommodations.