CE 240 Soil Mechanics Foundations Lecture 1 Historical Perspective of Soil Mechanics and Geotechnical Engineering Fundamentals of math and physics for geotechnical engineering Das Ch 1 Outline of this lecture 1 go through the syllabus 2 labs and homeworks 3 Historical Perspective of Soil Mechanics and Geotechnical Engineering 4 Fundamentals of math and physics for geotechnical engineering A Syllabus of CE 240 Soil Mechanics Foundations Fall Semester 2006 Course number CE 240 3 Credit Units Instructor Prof Lanbo Liu Lanbo Liu uconn edu TA Matthew Pruett matthew pruett huskymail uconn edu Web http www engr uconn edu lanbo Lecture Monday Wednesday and Friday 11 00 11 50 am Lecture Location Castleman Building Room 212 Lab Thursday one in the following 3 sessions 8 11 11 2 2 5 Lab Location Castleman Building Room 105 Textbook Principles of Geotechnical Engineering 6th Edition by B M Das Thomson Press 2006 Grading Lab 30 Midterm I 20 Midterm II 20 Final 30 Aims 1 2 3 4 To describe soil as an engineering material and to understand the nature of stresses induced in the soil and by the soil To give an appreciation of the function and forms of shallow and deep foundations To analyze bearing capacity and settlements of foundations To consider the relevance of site and ground investigation to soil and foundation engineering 08 28 Mon Introduction and the syllabus history of Geotechnical Engineering 08 30 Wed Rock cycle rock types and origin of soil 09 01 Fri Soil particles Reading Chapter 1 2 09 04 Mon 09 06 Wed 09 07 Thu 09 08 Fri Reading Chapter 3 Official holiday of the Labor Day no class weight volume relationships Lab 01 Soil consistency 09 11 Mon Atterberg limits 09 13 Wed Engineering classification of soil 09 14 Thu Lab 02 09 15 Fri Soil compaction Reading Chapter 4 5 09 18 Mon 09 20 Wed 09 21 Thu 09 22 Fri Reading Chapter 5 Soil compaction Proctor test Lab 03 Compaction techniques 09 25 Mon 09 27 Wed 09 29 Fri Reading Chapter 6 Permeability I Permeability II Midterm Exam I 10 02 Mon 10 04 Wed 10 05 Thu 10 06 Fri Reading Chapter 7 Groundwater flow Seepage I Groundwater flow Seepage II Lab 04 Groundwater flow Seepage II 10 09 Mon 10 11 Wed 10 12 Thu 10 13 Fri Reading Chapter 8 10 16 Mon 10 18 Wed 10 19 Thu 10 20 Fri Reading Chapters 9 In situ stresses I In situ stresses II Lab 05 In situ stresses III 10 23 Mon 10 25 Wed 10 26 Thu 10 27 Fri Reading Chapter 10 Compressibility of soil I Compressibility of soil II Lab 07 Compressibility of soil III Stress in a soil mass I Stress in a soil mass II Lab 06 Stress in a soil mass III 10 30 Mon Shear strength of soil I 11 01 Wed Shear strength of soil II 11 03 Fri Midterm Exam II Reading Chapter 11 11 06 Mon Lateral Earth Pressure I 11 08 Wed Lateral Earth Pressure II 11 09 Thu Lab 08 11 10 Fri Lateral Earth Pressure III Reading Chapter 12 13 11 13 Mon Slope stability I 11 15 Wed Slope stability II 11 16 Thu Lab 09 11 17 Fri Slope stability III Reading Chapter 14 11 27 Mon Soil bearing capacity 11 29 Wed foundations 12 01 Fri Soil bearing capacity for shallow foundations Reading Chapter 15 12 04 Mon Subsoil Exploration I 12 06 Wed Subsoil Exploration II 12 08 Fri Course summary and reviews Reading Chapter 17 Labs 1 12 13 students form a group 3 groups for the class of CE240 fall semester 2006 2 Safety first work on your lab no fool around 3 work out the lab by group effort but submit the lab report or data sheet individually and the grade is on individual base 4 Towards the end of the semester there may be 1 2 labs will be graded based on group effort HWs There will be HW assignment but no grading I will post the right answers on my web page upon the due date Midterms and final exam will cover the contents covered by HWs and labs Historical Perspective of Soil Mechanics and Geotechnical Engineering The record of the first use of soil as a construction material by man kind is lost in antiquity In true engineering sense there is no Geotechnical Engineering prior to the 18th Century One of the most famous example of problems related to soil bearing capacity and foundations in the construction of structures prior to 18th century is the Leaning Tower of Pisa in Italy The construction of the Tower began in 1173 A D and last over 200 years The Leaning Tower of Pisa Italy Morning 1 March 2004 SW view Height 54 m Max tilt 5 m out of plumb Tilt direction E N W and S Weight 15 700 tons Base 20 m Reason a weak clay layer at 11 m depth Solution excavation of soil from north side for about 70 tons Tilting of Garisenda Tower left in Bologna Italy built in 12th Century Study of soil behavior in a more methodical manner in the area of geotechnical engineering started in the early part of the 18th century and last to 1927 The development of soil mechanics can be divided into four phases according to Skempton 1985 1 Preclassical period 1700 1776 rough classification of soils 2 Classical soil mechanics Phase I 1776 1856 started from French scientist Coulomb s presentation on determining the sliding surface in soil behind a retaining wall ended by the publication of Rankine s paper on earth lateral pressure Rankin s theory is a simplification of Coulomb s theory 3 Classical soil mechanics Phase II 1856 1910 started from the publication of a paper on the permeability of sand filters by French engineer Darcy in 1856 4 Modern soil mechanics 1910 1927 marked by a series of important studies and publications related to the mechanic behavior of clays most noticeable Atterberg 1911 on consistency of clayey soils the Atterberg limits Bell 1915 on lateral pressure and resistance of clays Terzaghi 1925 on theory of consolidation for clays Geotechnical Engineering after 1927 The development of Geotechnical Engineering as a branch of Civil Engineering is absolutely impacted by one single professional individual Karl Terzaghi 1883 1963 His contribution has spread to almost every topic in soil mechanics and geotechnical engineering covered by the test book Effective stress Ch 8 Elastic stress distribution Ch 9 Consolidation settlement Ch 10 Shear strength Ch 11 in situ testing Ch 17 Born October 2 1883 in Prague Died October 25 1963 in Winchester Massachusetts He was married to Ruth D Terzaghi a geologist He won the Norman Medal of ASCE four times 1930 1943 1946 and 1955 He was given nine honorary doctorate degrees from universities in eight different countries He started modern soil mechanics with his theories of consolidation lateral earth pressures bearing capacity and