DOCSLIB.ORG

Lecture 1 Introduction to Soil and Soil Mechanics

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Lecture 1 Introduction to Soil and Soil Mechanics Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering Lecture 1 Introduction to Soil and Soil Mechanics Most of the civil structures rest on the soil, so the life of these structures depends on the soil and its behaviour under the loads. The behaviour of soil under the loads depends on the various properties of soil. The different soil properties can be determined by studying soil mechanics. 1.1 Soil The word “Soil” is derived from the Latin word “Solum” which has different meanings to different professions as: ① In agronomy: the term means the upper layer of the earth that may be plowed; specifically, the loose surface material of the earth in which plants grow. ② In geology: the term means the materials, which are produce from weathering of rocks and cover the upper layer of earth’s crust. ③ In civil engineering: the term means, uncemented inorganic material, composed of solid particles, produced by the disintegration of rocks. The void space between the particles may contain air, water or both. Since ancient ages, engineers have been handling soils as an engineering material for various construction projects. Construction of the Egyptian pyramids, Iraqi ziggurats, Roman aqueducts, and China’s Great Wall. In civil engineering, soil is used as (Figure 1-1): ① A constructional material (fill materials) such as earth dams, embankments, slopes, railways, highways, and airports. ② To supports loads from the foundations of buildings. Lecture 1: Introduction to Soil and Soil Mechanics 1 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering Figure (1-1): Use of Soil in Civil Engineering 1.2 Soil Mechanics Soil Mechanics is one of the youngest disciplines of civil engineering involving the study of the physical and mechanical properties of soil. The first definition of soil mechanics has been coined by so-called "father of soil" "Dr. Karl Terzaghi", Karl Terzaghi coins the term of "Soil Mechanics" in (1925), and define the soil mechanics as following: Soil Mechanics is the application of the 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 constituents. Definitions ① Foundation engineering: is a branch of soil engineering dealing with the application of principles of soil mechanics to the design and construction of foundations for various structures. ② Geotechnical engineering: is a broader term and refers in total to all engineering problems involving soil and/or rock as foundation material and construction material. Geotechnical engineering involves the application of soil mechanics, rock mechanics, and engineering geology to engineering problems including soils and rocks. Lecture 1: Introduction to Soil and Soil Mechanics 2 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering 1.3 Applications of Soil Mechanics in Civil Engineering Soil mechanics has vast applications in many fields of civil engineering works. Some of the important applications are as under: ① Foundations: The loads from any structure have to be transmitted to a soil through the foundation for the structure. Thus, the type, and details of which can be decided upon only with the knowledge and application of the principles of soil mechanics. ② Underground and Earth-retaining Structures: Underground structures such as pipe lines, and tunnels and earth-retaining structures such as retaining walls can be designed and constructed by evaluating the forces exerted by the soil on these structures. This requires application of the principles of soil mechanics. ③ Slopes and Excavations: Slopes is not horizontal surface, there is a component of weight of the soil, which tends to move it downward and thus cause instability of slopes. This requires study the stability analysis in soil mechanics. Likewise, excavations require the knowledge of slope stability analysis; deep excavations may need supports (bracing). These supports should be designed to resist the lateral forces exerted by the soil. This requires knowledge of theories of lateral earth pressure only in soil mechanics. ④ Embankments and Dams: The construction of embankments and earth dams where soil itself is used as the construction material requires a thorough knowledge of the engineering behaviour of soil especially in the presence of water. Knowledge of seepage analysis as well as compaction characteristics for achieving maximum unit weight of the soil is essential for efficient design and construction of embankments and earth dams. ⑤ Pavement Design: A Pavement is a hard crust placed on soil for providing a smooth a strong surface on which vehicles can move. Pavements depend more on the subgrade soil for transmitting the traffic loads. The design of pavements depends on swelling and shrinkage of sub-soil and frost action. Consideration of these factors is necessary and one cannot do without the knowledge of soil mechanics. Lecture 1: Introduction to Soil and Soil Mechanics 3 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering 1.4 Uniqueness of Soil Soil unlike others civil engineering materials such as concrete, steel, brick, ect. The soil problems as a material can be considered unique because: ① Stress-Strain relationship of soils is not linear. This makes the stress-strain properties analysis of soil mass is difficult. Non-Linear Stress Stress Linear Strain Strain ② Soil is not elastic material and the behaviour of soil depends on the elastic and plastic properties. Soil is Elasto-Plasto material. Elastic Stress Stress Elastic-Plastic Strain Strain ③ Soil behaviour strongly depends on pressure, time, and environments conditions. Soil properties are controlled by changing in pressure and presence of water. ④ Soil is not homogenous material; this means the soil properties may be different from location to other. ⑤ The nature of soil is complex (Figure 1-2). Soil composed of particles with wide range in sizes, shapes, and grading. Soil mass is three phase system, the pours between its solid particles filled with water and air. Because of these particulate natures of soil, the development of mathematical models to describe and predict the soil behaviour of soil is a difficult. Lecture 1: Introduction to Soil and Soil Mechanics 4 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering Clay particles Sand particles Soil System (solids, water, air) Soil particles Shapes of soil particles Figure (1-2): The Nature of Soil ⑥ Most soils are very sensitive to disturbance and the properties measured by a laboratory test may be unlike that of the in situ soil. ⑦ Soil mass cannot be seen entirely and its properties evaluated based on small sample. Lecture 1: Introduction to Soil and Soil Mechanics 5 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering 1.5 Example of Soil Mechanics Problems Engineers have to deal with many challenging soil mechanics problems even at present, as well as in the past. A famous building illustrates the problems of soil mechanics is leaning Tower of Pisa. This famous building illustrates historical soil mechanics problems. The (56 m) high tower at Pisa, Italy, leans about (3.9 m) at top toward the south. The construction of the tower started in (1173) and was completed in (1372). It was reported that the tower started to sink unevenly after the construction progressed to the third floor in ( 1178) and more floors were built up to accommodate for the tilt. The lean is due to differential settlement of the foundation soil. In March ( 1990), the tower was closed to the public due to the possibility of collapse in the near future. Engineering remediation procedures were discussed to stop further leaning. Lecture 1: Introduction to Soil and Soil Mechanics 6 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering An early attempt was made to put heavy load (800 metric tons of lead counterweight) on the north side of the tower foundation to compensate for the larger settlement on the south. A more drastic measure was taken later to extract soil mass (38 m3) under the north side of the foundation soil by angled auger holes so that the north side experienced extra settlement. In December 2001, the tower was reopened to the public and has been declared stable for at least another 300 years. Lecture 1: Introduction to Soil and Soil Mechanics 7 Al-Rafidain University Collage Civil Engineering Department Soil Mechanics Lectures for Third Year Students By Dr. Ahmed Al-Adly Ph. D Civil / Geotechnical Engineering Dr. Karl von Terzaghi (October 2, 1883 – October 25, 1963) An Austrian civil engineer and geologist, founder and guiding spirit of soil mechanics, outstanding engineering geologist, and preeminent foundation engineer. Is generally recognized as a Father of Soil Mechanics. His early professional life was spent in search for a rational approach to earthwork engineering problems. His efforts were rewarded with the publication in 1925 of his famous book on soil mechanics, this publication is now credited as being the birth of soil mechanics. Terzaghi was the first to make a comprehensive investigation of the engineering properties of soils; he created most of the theoretical concepts needed for understanding and predicting the behavior of soil; and he devised the principal techniques for applying scientific methods to the design and construction of foundations and earth structures.
Load more

Recommended publications
  • Rock Mechanics-Achievements and Current Problems Mehanika Stijena-Dostignuća I Aktualni Problemi
    Rock mechanics-achievements and current problems Mehanika stijena-dostignuća i aktualni problemi Prof. em. Ivan Vrkljan Faculty of Civil Engineering University of Rijeka President of Croatian Geotechnical Society ISRM Vice President at Large (2011-2015) Content Foundation of the ISRM Some of actual rock mechanics and rock engineering problems - Rock behaviour characterisation - In situ stress and residual stress in intact rock - What is the Strength of a Rock Mass? Rock mechanics position in Eurocode 7 Polemics in rock mechanics community Expectations of rock mechanics and ISRM Conclusions Foundation of the ISRM Circumstances in which the rock mechanics has been recognized Geology Engineering geology Rock mechanics Malpasset, 1958 450 people were killed Circumstances in which the rock mechanics has been recognized For rock mechanics recognition, next circumstances are specially important: Critical mass of knowledge about the behavior of rock masses have been reached. Technologies of excavation and stabilization have begun to significantly affect on the rock engineering and rock mechanics. The hardline of experts in the field of soil mechanics that rock mechanics should be developed within the soil mechanics. Circumstances in which the rock mechanics has been recognized Bjerrum, Terzaghi i Casagrande, august, 1957. (ISSMFE officers) Circumstances in which the rock mechanics has been recognized The early 1960s were very important in the development of rock engineering world-wide. 1910-1964: 60 slides were recorded in cuts along
    [Show full text]
  • Atterberg, Casagrande, and Terzaghi
    Three Musketeers in Soils Testing: Atterberg, Casagrande, and Terzaghi By Tracy Barnhart, Quality Manager Posted: October 2014 Who in their right mind invented a test that involves making “worms” out of soil? Albert Atterberg, that’s who! The Atterberg limit tests, commonly known as liquid and plastic limit of soils, are named for Albert Mauritz Atterberg, a Swedish chemist and agricultural scientist. Atterberg was born in 1846. In 1872, he earned his Ph.D. in chemistry from Uppsala University in Sweden. Atterberg taught analytical chemistry at Uppsala for several years before becoming a principal of the Chemical Station and Seed Control Institute in Kalmar, Sweden. Atterberg was a late bloomer when it came to soil classification. It wasn’t until he was in his mid-50’s that Atterberg turned his attention to the classification and plasticity of soils. He is credited for determining that plasticity is a particular characteristic of clay, the most complex and unpredictable type of soil. In 1913, Atterberg’s soil classification work received formal recognition from the International Society of Soil Science. He was 67 years old at the time and he passed away three years later. Arthur Casagrande was born in 1902 in Austria, over a half century after Albert Atterberg. He attended the Technische Hochschule, a secondary school in Vienna from which he earned a degree in civil engineering in 1924. Casagrande’s father died that same year, after which Arthur became the sole financial provider for his entire family. Because construction work was scarce in Austria after World War I, Casagrande decided to move to the United States to follow his true passion of civil engineering, and to better support his family.
    [Show full text]
  • Engineering Geology
    Investigation methods in Geotechnics VŠB-TUO – Faculty of Civil Engineering Department of Geotechnics and Underground Engineering Geotechnics • Applied geology (engineering geology and hydrogeology etc.)? • Geomechanics • Soil mechnics • Rock mechanics • Mechanics of snow and ice • Foundation engineering • Underground engineering • Another branches – eg. Earth structures, environmental geotechnics, quarrying etc. Karl von Terzaghi Engineering geology • Interdisciplinary between natural and technical sciences • Releases from physical geology, historical and regional geology, geomorphology, geophysics, hydrogeology, structural geology, petrography etc. • Studies and characterizes mutual relationship among rock mass, groundwater, surface water, geomorphology and their effect on engineering project • Utilizes laboratory and field methods including state of the art remote sensing methods Hans Cloos - Quido Záruba – Vojtěch Mencl Zdroj: www.geology.cz Rock environment – Foundation soil - Investigation • Foundation soil = terminus technicus covering rock and soil environment interaction (thru the foundations) with the structure. It is necessary to include rock environment surrounding the structure! • Errors and imperfections of investigation have impacts on the structure life time. • Errors discovering during the: • Design (cheapest correction) • Construction (more expensive) • Operation (the worst case; the most expensive!) • Site Investigation cost (terminology) • Small simple structure cca 0,1-0,5 % of capital cost (investment) • Conventional
    [Show full text]
  • International Society for Soil Mechanics and Geotechnical Engineering
    INTERNATIONAL SOCIETY FOR SOIL MECHANICS AND GEOTECHNICAL ENGINEERING This paper was downloaded from the Online Library of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). The library is available here: https://www.issmge.org/publications/online-library This is an open-access database that archives thousands of papers published under the Auspices of the ISSMGE and maintained by the Innovation and Development Committee of ISSMGE. Organization of the conference Organisation du congres OFIGANIZING COMMITTEE / COMITE D'ORGANISATION H.Bolton Seed Chairman/ President R.T.Lawson Wce-Chairman for Organization /Woe-President pour l'Organisation J.K.Mitchell Woe-Chairman tor Program/ Woe-President pour le Programme C.Ries & PTTringale Secretaries / Secretaires Elizabeth Yee Manager/ Administrateur TASK COMMITTEES / COMITES SPECIFIOUES R.B. Peck Program Committee / Comité de Programme WFMarcuson, lll Conference Proceedings Committee/ Comité des Comptes Rendus du Congres J.M.Duncan Bulletins Committee/ Comité des Bulletins G.M.Reynolds Finance Committee/ Comité des Hnances B.B.Gordon Committee on Exhibits/ Comité des Expositions R.Lundgren Home Hospitality Committee / Comité d'Accueil a Domicile VlLEnkeboll Simultaneous Translation Committee/ Comité de Traduction Simultanée R.M.Pyke Post-Conference Tours Committee/ Comité des Excursions suivant le Congres J.Lysmer, TL.Brekke Banquet Committee / Comité de Banquet N.Sitar Program Support Committee/ Comite de Support du Programme R.D.Darragh Reception Committee / Comité
    [Show full text]
  • Poromechanics V Proceedings of the Fifth Biot Conference on Poromechanics
    POROMECHANICS V PROCEEDINGS OF THE FIFTH BIOT CONFERENCE ON POROMECHANICS July 10–12, 2013 Vienna, Austria SPONSORED BY Vienna University of Technology/Technische Universität Wien Engineering Mechanics Institute of the American Society of Civil Engineers EDITED BY Christian Hellmich Bernhard Pichler Dietmar Adam Published by the American Society of Civil Engineers Preface We are extremely honored, and very happy, to cordially welcome you in the cosmopolitan and culturally rich City of Vienna and at the Vienna University of Technology (TU Wien), the oldest of its type in Central Europe, for the Fifth Biot Conference on Poromechanics (BIOT-5). In 2013, this year marking the 50th anniversary of the death of Karl von Terzaghi (1883-1963), we hold BIOT-5 in memory of this “Grandfather of Poromechanics,” the founder of consolidation experiments and theoretical soil mechanics in general (see the Introduction for further historical remarks). We are very grateful that a significant number of brilliant scientists were ready to organize mini-symposia on topics that they rated as most interesting and stimulating. These mini- symposia are the natural backbone of BIOT-5’s scientific program, their titles and organizer affiliations representing the scientific and geographic breadth of BIOT-5 (see the Introduction for all names and further details). The design and set-up of BIOT-5 was strongly supported by the Local Organizing Committee, the International Scientific Committee, and the Advisory Committee, comprising all the earlier Biot conference hosts, in particular by Franz Ulm (M.I.T.), as well as by Alex Cheng (University of Mississippi) and Younane Abousleiman (University of Oklahoma), the latter two having been so instrumental in launching, with the help of Madame Nadine Biot, the Biot conference series, and staying the ever-motivated “good spirits” behind the scenes.
    [Show full text]
  • Soil Mechanics Fundamentals and Applications Second Edition
    Soil Mechanics Fundamentals and Applications Second Edition Soil Mechanics Fundamentals and Applications Second Edition Isao Ishibashi Hemanta Hazarika Boca Raton London New York CRC Press is an imprint of the Taylor & Francis Group, an informa business Isao Ishibashi and Hemanta Hazarika hold the exclusive rights to the Japanese language translation of this work. CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2015 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Version Date: 20150211 International Standard Book Number-13: 978-1-4822-5042-8 (eBook - PDF) This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and publishers have attempted to trace the copyright holders of all material reproduced in this publication and apologize to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged please write and let us know so we may rectify in any future reprint. Except as permitted under U.S. Copyright Law, no part of this book may be reprinted, reproduced, transmit- ted, or utilized in any form by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information storage or retrieval system, without written permission from the publishers.
    [Show full text]
  • Historical Background and Evolution of Soil Mechanics
    Philotheos Lokkas, Ioannis Chouliaras, WSEAS TRANSACTIONS on ADVANCES in ENGINEERING EDUCATION Theodoros Chrisanidis, Dimitrios Christodoulou, DOI: 10.37394/232010.2021.18.10 Emmanouil Papadimitriou, Evangelos Paschalis Historical background and evolution of Soil Mechanics PHILOTHEOS LOKKAS1, IOANNIS CHOULIARAS2, THEODOROS CHRISANIDIS3, DIMITRIOS CHRISTODOULOU4, EMMANOUIL PAPADIMITRIOU5, EVANGELOS PASCHALIS6 1Emeritus Professor, University of Thessaly, Greece 2Profeessor, General Department of Larissa, University of Thessaly, Greece 3PhD Civil Engineer, Post-Doctoral Researcher (Dr., MSc DIC) 4Environmeral Department of Larissa, University of Thessaly, Greece 5 Civil Engineering T.E, University of Thessaly 6Msc Civil Engineer T.E Abstract: - The behavior of soil either as a building material or as a load receiver is particularly important and presents a paramount significance in both infrastructure and building construction. Geotechnical engineering has shown a rapid development over the last fifty years and holds a prominent position in all scientific fields of engineers. This paper mainly aims at the historical background along with the progress made on Soil Engineering as an important branch of Surveyors, Civil and Mining Engineers, where, through an important citation of technical works and constructions over time, may be considered as a significant tool for teaching and education of students. Key-Words: - Foundation, Infrastructure, Geotechnical Education, Soil mechanics, Mining Engineering Received: July 1, 2021. Revised: July 28, 2021. Accepted: July 30, 2021. Published: August 4, 2021. 1 Introduction is a product of laboratory and field tests and Soil Mechanics is an application of the statutory laws geotechnical exploration in general. The test results of engineering and hydraulics to soil material. The are useful to understand the behavior and properties soil, compared to many other materials studied in of the soil with a view to their final incorporation into engineering, such as concrete, steel, wood has two the design process.
    [Show full text]
  • Czech Republic
    Coor din ates: 4 9 °4 5 ′N 1 5 °3 0′E Czech Republic [10] The Czech Republic (/ˈtʃɛk -/ ( listen); Czech: [11] Czech Republic Česká republika [ˈtʃɛskaː ˈrɛpublɪka] ( listen)), known alternatively by its short-form name, Česká republika (Czech) [12] Czechia (/ˈtʃɛkiə/ ( listen); Czech: Česko [ˈtʃɛsko] ( listen)), is a landlocked country in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast.[13] The Czech Republic covers an Flag area of 7 8,866 square kilometres (30,450 sq mi) Greater coat of arms with a mostly temperate continental climate and Motto: "Pravda vítězí" (Czech) oceanic climate. It is a unitary parliamentary "Truth prevails" republic, with 10.6 million inhabitants; its capital Anthem: and largest city is Prague, with 1.3 million residents. Kde domov můj (Czech) Other major cities are Brno, Ostrava and Pilsen. The Where is my home Czech Republic is a member of the European Union 0:00 MENU (EU), NATO, the OECD, the United Nations, the OSCE, and the Council of Europe. It is a developed country [14] with an advanced,[15] high income[16] export-oriented social market economy based in services, manufacturing and innovation. The UNDP ranks the country 14th in inequality-adjusted human development.[17] The Czech Republic is a welfare state with a "continental" European social model, a universal health care system and tuition-free university education. It ranks as the 6th safest or most peaceful country and Location of the Czech Republic (dark green) is one of the most non-religious countries in the – in Europe (green & dark grey) world,[18] while achieving strong performance in – in the European Union (green) – [Legend] democratic governance.
    [Show full text]
  • Sutherland Philatelics AUSTRIA
    SUTHERLAND PHILATELICS, PO BOX 448, FERNY HILLS D C, QLD 4055, AUSTRALIA Page 1 SG Michel Year Particulars MUH Mint MNG Fine Used Used Sutherland Philatelics PO Box 448 Ferny Hills D C, Qld 4055 Australia ABN: 69 768 764 240 website: sutherlandphilatelics.com.au e-mail: [email protected] phone: international: 61 7 3851 2398; Australia: 07 3851 2398 AUSTRIA List Structure: AUSTRO-HUNGARIAN EMPIRE - AUSTRIA TO 1918 REPUBLIC 1918-1938 ALLIED OCCUPATION AUSTRIAN REPUBLIC FROM 1945 Broken sets, special cancels, postal stationery, commemorative sheets, telegraph stamps, official delivery, FRAMAS Austro-Hungarian Military Post Austro-Hungarian POs in the Turkish Empire = imperforate ( = airmail SG Mi 703 555A 1933 WIPA.ordinary paper VFU with exhibition cancel To find an item in this list, please use Adobe's powerful search function. We obtain our stock from collections we purchase. We do not have an Austria supplier. Consequently, where something is unpriced, we do not have it at present. We list all items we have in stock, including broken sets, and singles from sets. Prices subject to change without notice. Please note that GST (currently 10%) is applicable from 1 July 2000. International sales are GST free. The prices in this list INCLUDE GST All prices are in Australian dollars. E&OE CREDIT CARDS: VISA & MASTERCARD ACCEPTED -- MIN $30 SUTHERLAND PHILATELICS, PO BOX 448, FERNY HILLS D C, QLD 4055, AUSTRALIA Page 2 SG Michel Year Particulars MUH Mint MNG Fine Used Used AUSTRO-HUNGARIAN EMPIRE - AUSTRIA TO 1918 Currency -- 60 kreuzer = 1gulden Arms of Austria - imperforate rough hand made paper - wmk K.K.H.M.
    [Show full text]
  • Shear Strength and Stability of Highway Embankments in Ohio a Thesis Presented to the Faculty of the Russ College of Engineering
    Shear Strength and Stability of Highway Embankments in Ohio A thesis presented to the faculty of the Russ College of Engineering and Technology of Ohio University In partial fulfillment of the requirements for the degree Master of Science Xiao Han March 2010 © 2010 Xiao Han. All Rights Reserved. 2 This thesis titled Shear Strength and Stability of Highway Embankments in Ohio by XIAO HAN has been approved for the Department of Civil Engineering and the Russ College of Engineering and Technology by Teruhisa Masada Professor of Civil Engineering Dennis Irwin Dean, Russ College of Engineering and Technology 3 ABSTRACT HAN, XIAO, M.S., March 2010, Civil Engineering Shear Strength and Stability of Highway Embankments in Ohio (182 pp.) Director of Thesis: Teruhisa Masada One of the primary factors that control the stability of earthen embankments is the shear strength of embankment fill soils. Karl von Terzaghi and U.S. Navy found empirical correlations between soil shear strength and lab or in-situ soil test results. Subsequently, the Navy proposed typical effective friction angle values for different soils types. However, it is not certain if these correlations and standard values are reliable for Ohio soils. The main objective of this thesis is to establish reliable correlations between shear strength and index properties/in-situ test measurements for embankment fill soils existing in Ohio. Relatively undisturbed soil samples were gathered from nine highway embankment sites spread throughout Ohio. Tri-axial compression tests were performed to determine the shear strength of these soil samples. During data analysis, statistical methods, such as regression analysis and T-tests, were utilized to assess the correlations.
    [Show full text]
  • Proceedings 1936
    ~· . ~· '{ '1 PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ' t .. SOIL MECHANICS AND .! t~· ~{ FOUNDATION ENGINEERING f ~~( JUNE 22 to 26, 1936 . ·~. :"::; mm m VOLUME I GRADUATE SCHOOL OF ENGINEERING HARVARD UNIVERSITY CAMBRIDGE, MASS. (ALL RIGHTS RESERVED) III. TABLE OF CONTENTS Section Bt EXPLORATION OF SOIL CONDITIONS AND SAMPLING OPERATIONS Page B-1 Exploration of Soil Conditions and Sampling Operations. Submitted by Laboratory of Soil Mechanics, Delft (Netherlands) B-:2 Sampling and Testing Undisturbed Sands from Boreholes, J, P, van Bruggen (Netherlands) B-3 · Short Description of a Field-Testing Method with Coneshaped Sounding Apparatus. p, Barentsen (lletherlands) 7-10 B-4 E>oploraticn of Soil Conditions and Sampling Operations. WilliamS, Hanna (Egypt) lQ-ll B-5 Exploration of Soil Conditions and Sampling Operation, L, F, Cooling and D, B, Smith (England) 1:2 B-6 An Improved Type of Soil Sampler for Eloploration of Soil Conditions and Sampling Operations. Thomas E, Stanton (U,S,A,) B-7 Desoription of An Apparatus to Register Graphically the Settlements of a Plane Plate Resting upon a Subsoil and Charged with a Constant or Inoreasing Load. J, L, A, Cuperas (Netherlands) 16-22 Seotion Ct REGIOnAL SOIL STUDIES FOR ENGINEERING PURPOSES · 0-l Regional Soil Studies for Engineering Purposes, William S, Hanna (Egypt) 0-:2 Soil Survey of the Flushing Meadow Park Site, Long Island, New York, George L, Freeman (u .S,A,) 0-3 Rels.tion betwoon the Chemioal Composition and the Physical Characteristics of Some Hawaiian Soils. Carl B, Andrews (Hawaii) Section D: SOIL PROPERTIES D-l Comparison Betvreen Consolidation, Elastic, and other Soil Properties Established from Laboratory Tests and from Observations of Structures in Egypt.
    [Show full text]
  • Download Karl Terzaghi: the Engineer As Artist Free Ebook
    KARL TERZAGHI: THE ENGINEER AS ARTIST DOWNLOAD FREE BOOK Richard E. Goodman | 352 pages | 31 Jul 1999 | American Society of Civil Engineers | 9780784403648 | English | Reston, United States Karl Terzaghi, the Engineer as Artist He solved many seemingly insurmountable problems in geotechnical engineering and was generous in providing information to others on how it was done. Search in title. One must love it and observe its performance not only in the laboratory but also in the field, to become familiar with those of its manifold properties that are not disclosed by boring records. If civil engineering were a game, Terzaghi had a right to lay down the rules, as he had invented and established much of the groundwork. He accepted a chair at the Vienna Technische Hochshule in the winter of Relevant discussion may be found on the talk page. From toArthur Casagrandeanother pioneer of soil mechanics and geotechnical engineering, worked as Terzaghi's private assistant at MIT. Selected Topics. Follow through on every angle and every subtask. He was adept in the fields of reinforced concrete, hydraulics, geology and soil science as well as soil mechanics. This material emerged from reading his publications, hundreds of unpublished reports, thousands of private letters, and 82 volumes of previously private personal diaries. Search in pages. Inhe emigrated to the United States Karl Terzaghi: The Engineer as Artist took up a post at Harvard University. Download as PDF Printable version. Brown Medal in After work, they would have dinner together when Terzaghi's conversation led her to Greek drama, Russian literaturethe works of Hermann Hessethe poems of Rainer Maria Rilke as well as the writings of great Karl Terzaghi: The Engineer as Artist philosophers.
    [Show full text]