EGB373-LN01-Week 01-Introduction to geotechnical engineeirng-colour PDF

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Summary

Welcome to the new semester and EGB273- Principles of construction. Great to see that nearly 190 students have enrolled in this unit. This unit is designed to equip you with fundamentals of construction engineering which is required in your relevant profession....

Description

Geotechnical Engineering (EGB373) Dr Yilin Gui (Coordinator & Lecturer) Contact details: E-mail:[email protected] Extension: 80686 Room S770, S - Block, Gardens point campus

Acknowledgement of Traditional Owners The Queensland University of Technology (QUT) acknowledges the Turrbal and Yugara, as the First Nations owners of the lands where QUT now stands. We pay respect to their Elders, lores, customs and creation spirits. We recognise that these lands have always been places of teaching, research and learning. QUT acknowledges the important role Aboriginal and Torres Strait Islander people play within the QUT community.

Academic and Technical Staff •

Dr. Yilin Gui ([email protected]) – Lectures and unit coordinator

•

Mr. Yasas Kolonnage ([email protected])– Tutorials only

•

Mr. Tharindu Abeykoon ([email protected] ) – Tutorials only

•

Ms. Nishadi Nayanthara Pahalage ([email protected]) – Tutorials only

• •

Mr. Bonan Li ([email protected] ) – Lab pracs only Mr. Kasun Kankanamg ([email protected]) --Lab pracs only

•

Glen Barnes (Senior Laboratory Technical Officer)([email protected] )

Formal contact periods • Lectures : Tuesday 4.00pm - 6.00pm ( face to face+livestreaming) : Thursday 11.00am -12.00pm (face to face +livestreaming) • Tutorials : (Week 2 -13) (face to face) Thursday: 12.00 pm-2.00 pm (GP-E-410) – Nishadi 2.00 pm-4.00 pm (GP-B-121) – Yasas 4.00 pm-6.00 pm (GP-B-124) – Nishadi 6.00 pm-8.00 pm (GP-B-122) – Tharindu

• Practical Classes : Prac 1 (2 hrs): Week 8 – 9

(O-119) – Flow Deformation Experiment

Prac 2 (1 hr) : Week 10-11

(O-119) – Soil Shear Experiment

Academic Calendar (2021)

Unit content • Topic 1: Introduction to Geotechnical Engineering & Review of EGB270’s soil topics (week - 1) • Topic 2: Permeability and Seepage (Week – 2 & 3) • Topic 3: Stresses in soils

(Week – 4 & 5)

• Topic 4: Soil Settlements (deformations)

(Week - 6,7,& 8)

• Topic 5: Shear strength of soils (Week – 9,10, & 11) • Topic 6: Design of Shallow foundation (Week – 12) • Topic 7: Ethical Practices in Geotechnical Eng. (Week – 13)

Resources • Lecturers & lecture notes, tutorial • Text book: – Craig’s Soil Mechanics (8th edition)

• Materials on Black Board • Library • Internet

Assessment •Online Problem Solving Task, weighting = 20% - Due: Week 7

•Practical Classes & Reports, weighting =20% - Due: 1 week after each prac - Prac 1: Flow-Deformation experiment (Week 8-9) = 13% - Prac 2: Soil shear strength experiment (Week 10-11) = 7%

• Final Exam, weighting = 60% - Due: End of semester Final (%) = 0.2 (Prac %) + 0.2 (quiz %) + 0.6 (Final exam %) 100% ~ 85% = Grade 7, 64% ~ 50% = Grade 4, 24% ~ 0% = Grade 1

84% ~ 75% = Grade 6, 49% ~ 40% = Grade 3,

74% ~ 65% = Grade 5, 39% ~ 25% = Grade 2,

(1 /4)

(2 /4)

Assessment - Online problem solving task, weighting = 20% (Due: Week 7)

• 30-40 multiple choice questions (theory and analytical) with different weightings should be completed in 3.5 hrs through unit Blackboard site • The task can be completed anytime during week 7 • The maximum of two attempts are allowed. The highest mark out of two attempts will be recorded. It is not compulsory to take both attempts • The task will be based on lecture contents from week 1 to 6. • More details will be provided in Week 5 announcement

through email & BB

Assessment

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- Practical Classes & Reports, weighting =20% (both prac attendance and report submission are compulsory)

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Due: 1 week (including holidays, weekends, and semester breaks) after each prac session from your prac class

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Register (through SAMS) for a pracs session that you can attend. Changing the registered prac session is not allowed. If you need to change the session due to unavoidable circumstances, contact Engineering student services (NOT COORDINATOR) with valid evidences (e.g. medical certificates)

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Prac reports have to be submitted online through BB as a pdf document. The late submission without an approved extension will not be marked. Submission extension approval: https://www.student.qut.edu.au/studying/assessment/late-assignments-and-extensions

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More details on prac classes and report submission will be provided in Week 7 & 9 through email, BB announcement, and prac instruction sheet I will not reply to emails regarding prac session changes and late report submission unless they come through Engineering student services

Assessment - Final Exam, weighting = 60% (Due: Semester 2, Exam Period)

• More details on exam and exam questions will be given in Week 13 lecture

(4 /4)

What is Geotechnical Engineering? When you build a piece of infrastructure it has to be connected to the ground. Geotechnical engineering is about understanding how the infrastructure interacts with the ground.

Ground before Burj Khalifa was constructed

The World tallest Building – Burj Khalifa (Burj Dubai), 830 m ( 163 floors)

Geotechnical Engineering Applications (1) Geotechnical engineers deal with many types of infrastructures: • • • • • • • • • •

Buildings & Bridges (Foundation) Dams Tunnels Roads and Runways Railways Slopes and slope stability Retaining walls Landfills Ports etc.

Geotechnical Engineering Applications (2) Buildings & Bridges (Foundation)

Geotechnical Engineering Applications (3) Water Retaining Structures (Dams)

Geotechnical Engineering Applications (4) Tunnels

Geotechnical Engineering Applications (5) Roads and Run ways

Geotechnical Engineering Applications (6) Railways

Geotechnical Engineering Applications (7) Slopes and Stability

Soil nailing

Retaining walls

Geogrids

Geotechnical Engineering Applications (8) Retaining walls

Geotechnical Engineering Applications (9) Ports and offshore structures

Mining

Biggest Diamond mine

Supper pit open cut, Australia

Soil Improvements

Wet soil mixing

Dry soil mixing

Dynamic compaction

Wick drains

Rapid impact compaction

In each of above cases……  The properties and behaviours of soil or rock govern the behaviour of geo-structure  Soils and rock are different from many other engineering materials (steel, plastic, concrete etc): - No specific properties - Properties can vary widely: * Location to location (non-uniform/heterogeneous) * With direction (vertical and Horizontal) (Anisotropic) The work that geotechnical engineers do is often invisible once construction is completed. However, successful engineering projects are heavily dependent on geotechnical engineering design

What should Geotechnical Engineer know? • • • • •

Earth materials Properties of earth materials How to measure earth materials Geotechnical theories Geotechnical Engineering design principles The ground always has a complicated behaviour, whatever the type of soil or rock it is made of, so geotechnical engineering is very exciting and challenging – no two problems are ever the same

Geotechnical Engineering Failures (1) Foundations

Laid down building

Pile foundation failure

Geotechnical Engineering Failures (2) Soil liquefaction

Christchurch liquefaction Liquefaction in Italy

Geotechnical Engineering Failures (3) Excessive soil deformation

The Leaning tower of Pisa

Units where you hear/learn about soil and Geotechnical Engineering in EN01 – Civil Engineering Degree • EGB123 – Civil Engineering Systems: What is Geotechnical Engineering • EGB270 – Civil Engineering Materials: Soil as construction material (basic properties, soil classification, soil compaction) • EGB373 – Geotechnical Engineering – Fundamentals (Theories) and laboratory measurements in Geotechnical Engineering • EGH473 – Advanced Geotechnical Engineering- Geotechnical Designs...