Course Introduction

Outline Soil Mechanics −

Introduction to Geotechnical Engineering & Soil Mechanics Chih-Ping Lin National Chiao Tung Univ. [email protected]

Geotechnical Engineering is: That branch of civil engineering that deals with soil, rock, and under-ground water, and their relation to the design, construction, and operation of engineering projects.

What is Geotechnical Engineering? „ Scope & Objective of Soil Mechanics „ Course Policy „

Geotechnical Failures

Geotechnical Failures 林肯大郡

Issues addressed by geotechnical engineers: Can the soils support the structure? „ What is the groundwater condition and how will that affect the structure? „ What is the impact of grading, excavation or filling? „ Are the earth and rock slopes stable? „ What type of foundations are best suited for the structure? „

高屏大橋

What type of retaining walls if used are required? „ How will the site respond to an earthquake? „ Is the site contaminated? „ How can a contaminated site be remediated? „

Steps (Activities) in Geotechnical Engineering

大地工程 淺基礎 深基礎 擋土牆 開挖支撐 加勁系統 土壤改良

基礎工程

Study the geology of the site and how it affects the planned construction „ Investigate the surface and subsurface geotechnical materials „ Conduct field and laboratory tests to ascertain the necessary engineering properties of the soil „

土方工程 邊坡工程 土壤邊坡 岩石邊坡

隧道工程 土壤隧道 岩石隧道

Emerging Market 維護工程 環境地工 永續生態

Determine the most economical foundation system compatible with the geotechnical properties of the site and the needs of the structure. „ Develop appropriate construction procedures. „ Monitor the progress of construction „

(The analytical tools we use to perform engineering analyses of soils and rocks are collectively known as soil mechanics and rock mechanics)

防災工程 永續資源

To complete a geotechnical engineering project one must: Understand the nature of the structural and geotechnical loading „ Understand the geological setting of the construction site „ Understand the engineering behavior of the soils that will carry the structural loads „ Understand the interaction between the soil and rock and the foundation elements. „

This Course will:

Foundations

„

Focus on understanding the engineering behavior of soils: … Seepage

Soil Mechanics

… Strength … Deformation

„

This requires an understanding of: … The origin of soil … The nature of the individual particles that make up

Statics

Strength of materials

a soil

Engineering Geology

Objectives of Course … The effect of particle grouping (packing) on the

engineering properties of soil. … An understanding of how water flows and groundwater pressure changes in soil. … The very important effect of water on the engineering properties of soil. … An understanding of how stresses are transmitted to and through soil material … The effect of the transmitted stresses on the deformation of soil elements, and … An understanding of how soil fails under load.

„

To study the physical characteristics of soil as they relate to its use as a construction material or as a load carrying component of an engineered structure. Emphasis will be placed on the strength and deformation characteristics of a soil under load. The groundwater flow characteristics will also be studied.

By the end of this course you will be able to: „ „ „ „

„

„

Describe the fundamental differences in engineering behavior between cohesive and cohesionless soils. Compute the groundwater seepage and distribution of groundwater pressure. Compute the geostatic and applied stress beneath the ground surface Demonstrate that you know the fundamental difference in the strength and deformation characteristics of cohesive and cohesionless soils. Analyze field and laboratory data to determine the strength and deformation properties of cohesive and cohesionless soils. Compute settlements in a soil stratigraphy due to consolidation of the soil.

My expectations of you are „ „ „ „ „ „ „

You will attend every class meeting. You will prepare for class by reading the material assigned for that day. You will be an active participant in class discussion. You will turn in your homework at the appointed time. You will prepare you homework in a professional manner. You will attend all laboratory sessions You will not cheat nor will you condone cheating of others. Our profession demands honesty and integrity. Lives depend upon us

My obligations to you are „

„ „ „ „

I will present the course material covering the assigned topics according to the syllabus schedule. I will encourage questions and class participation in discussion. I will assign grades fairly and reasonably. I will return graded homework and examinations the next week after they have been submitted. I will be available in my office most of the time or by appointment for consultation

Your grade will be based on the following A.

Three Examinations

60%

B.

Final Examination

20%

C.

Class Quizzes/Problems

20%

Total ..................

100

Course website: http://geo.cv.nctu.edu.tw/soilmech