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ECIV 330 Soil Mechanics Chapter1

ECIV 330 Soil Mechanics Chapter1 - ECIV 330 Soil Mechanics...

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ECIV 330 Soil Mechanics Prof. Bill X. Yu Spring, 2008
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Chapter I Introduction to Soil Mechanics Content Introduction to soil mechanics Typical problems faced by soil mechanics A classic geotechnical problem Requirement A preliminary knowledge of the history of soil mechanics
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Introduction of Geotechnical Engineering Soil The term Soil has various meanings, depending upon the general field in which it is being considered. To a Pedologist ... Soil is the substance existing on the earth's surface, which grows and develops plant life. To a Geologist ..... Soil is the material in the relative thin surface zone within which roots occur, and all the rest of the crust is grouped under the term ROCK irrespective of its hardness. To an Engineer .... uncemented aggregate of mineral grains and decayed organic matter (solid particles) with liquid and gas in the empty spaces between the solid particles.
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Soil Mechanics According to Terzaghi (1948): "Soil Mechanics is the application of laws of mechanics and hydraulics to engineering problems dealing with sediments and other unconsolidated accumulations of solid particles produced by the mechanical and chemical disintegration of rocks regardless of whether or not they contain an admixture of organic constituent." Soil Mechanics is one of the youngest disciplines of Civil Engineering involving the study of soil, its behavior and application as an engineering material.
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Soils: Engineering Use and Properties to Study Engineering use Support structural foundations Construction materials Properties Origin, grain-size distribution, ability to drain water, compressibility, shear strength, load bearing capability
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Geotechnical Engineering Principle of Civil Engineering that involves application of soil mechanics and rock mechanics to the design of foundations, retaining structures, and earth structures Soil Mechanics (Soil Properties and Behavior) Foundation Engineering (Deep & Shallow Foundation) Soil Dynamics (Dynamic Properties of Soils, Earthquake Engineering, Machine Foundation) Pavement Engineering (Flexible & Rigid Pavement) Rock Mechanics (Rock Stability and Tunneling) Geosynthetics (Soil Improvement)
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History of Soil Mechanics Prior to 18 th century Experience with flood prevention Irrigation Building structures (pyramids, temples) Î Necessity to address the behaviors of soils in a more methodical manner
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History of Geotechnical Engineering Pre-classical (1700 to 1776 A.D) Natural slope, unit weight of soils, earth pressure theory Visual description and unit weight as a means to classify soils
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History of Geotechnical Engineering
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