SHEAR STRENGTH I YULVI ZAIKA
|
|
- Tobias Reginald Haynes
- 6 years ago
- Views:
Transcription
1 SHEAR STRENGTH I YULVI ZAIKA
2 MATERI Keruntuhan mohr coulomb, stress paths, kuat geser tanah non kohesif dan kohesif, evaluasi kuat geser di lapangan, tegangan normal dan tegangan geser pada sebuah bidang
3 Strength of different materials Steel Concrete Soil Tensile strength Compressive strength Shear strength Complex behavior Presence of pore water
4 Shear strength of soil Soil cannot resist tension Soil can resist compression. For excessive compression failure occurs in the form of shearing along the internal surface within the soil Structural Strength of soil = f ( soil s shear strength) Shear Strength Soil s ability to resist sliding Important for foundation design Lateral earth pressure calculations Slope stability analysis
5 Shear Strength due to sliding friction Normal Force Sliding Force
6 Shear Strength due to sliding friction Normal Force Sliding Force
7 What is Shear Strength? Shear strength in soils is the resistance to movement between particles due to physical bonds from: A.Particle interlocking b.. Atoms sharing electrons at surface contact points C.. Chemical bonds (cementation) such as crystallized calcium carbonate
8 Influencing Factors on Shear Strength The shearing strength, is affected by: soil composition,: mineralogy, grain size and grain size distribution, shape of particles, pore fluid type and content, ions on grain and in pore fluid. Initial state: State can be describe by terms such as: loose, dense, over--consolidated, normally consolidated, normally consolidated, stiff, soft, etc. Structure : Refers to the arrangement of particles within the soil mass; the manner in which the particles are packed or distributed. Features such as layers, voids, pockets, cementation, etc, are part of the structure.
9 Shear failure of soils Soils generally fail in shear Strip footing Embankment Failure surface Mobilized shear resistance At failure, shear stress along the failure surface (mobilized shear resistance) reaches the shear strength.
10 Shear failure of soils Soils generally fail in shear Retaining wall
11 Shear failure of soils Soils generally fail in shear Retaining wall Mobilized shear resistance Failure surface At failure, shear stress along the failure surface (mobilized shear resistance) reaches the shear strength.
12 Shear failure mechanism failure surface The soil grains slide over each other along the failure surface. No crushing of individual grains.
13 Shear failure mechanism At failure, shear stress along the failure surface () reaches the shear strength ( f ).
14 Mohr-Coulomb Failure Criterion (in terms of total stresses) f c tan Cohesion c f Friction angle f is the maximum shear stress the soil can take without failure, under normal stress of.
15 Mohr-Coulomb Failure Criterion (in terms of effective stresses) c f tan Effective cohesion c f Effective friction angle u u = pore water pressure f is the maximum shear stress the soil can take without failure, under normal effective stress of.
16 Mohr-Coulomb Failure Criterion Shear strength consists of two components: cohesive and frictional. f f c f tan f tan frictional component c c f
17 NOTE c and are measures of shear strength. Higher the values, higher the shear strength.
18 Mohr Circle of stress Soil element q q q cos sin Resolving forces in and directions,
19 Mohr Circle of stress
20 Mohr Circle of stress P D = Pole w.r.t. plane q (, )
21 Mohr Circles & Failure Envelope Failure surface c tan f X Y X Y Soil elements at different locations Y ~ stable X ~ failure
22 Mohr Circles & Failure Envelope The soil element does not fail if the Mohr circle is contained within the envelope GL Y c c Initially, Mohr circle is a point c c +
23 Mohr Circles & Failure Envelope As loading progresses, Mohr circle becomes larger GL Y c c c.. and finally failure occurs when Mohr circle touches the envelope
24 Orientation of Failure Plane 1 Failure envelope 3 q 3 (90 q) (, f ) 1 3 q P D = Pole w.r.t. plane Therefore, 90 q = q q 45 + /
25 Mohr circles in terms of total & effective stresses v v u X h = X h + X u effective stresses total stresses h v h u v or
26 Failure envelopes in terms of total & effective stresses v v u X h = X h + X u If X is on failure Failure envelope in terms of effective stresses effective stresses Failure envelope in terms of total stresses total stresses c c h v h u v or
27 Mohr Coulomb failure criterion with Mohr circle of stress X v = 1 h = 3 ( c 1 3 )/ X is on failure 3 1 Therefore, 3 c cot sin c cot ( 1 3 )/ 1 Failure envelope in terms of effective stresses 1 3 effective stresses
28 Mohr Coulomb failure criterion with Mohr circle of stress 3 c cot sin ( ) ( ) sin c cos ( ) 1 sin ( 1 sin ) c cos ( 1 sin ) cos c ( 1sin ) ( 1sin ) 1 3 tan 45 c tan 45
29 If c=0 then sinφ = σ 1f σ 3f σ 1f +σ 3f Or σ 1 = 1+sinφ = σ 3 1 sin φ tan 45 + φ Failure envelope in terms of effective stresses 3 ( 1 3 )/ 1 effective stresses
30 exercises A cylindrical soil (sand) sample was subjected to axial principal stress (1) and radial principal stress (3). The soil can not support additional stress when 1 = 300kPa and 3 =100 kpa. Determine the friction angle and the inclination of the slip plane to the horizontal.
31 Stress Point v stress point t stress point h X ( v - h )/ h v s ( v + h )/ v h s t v h 31
32 Stress Path During loading t Stress path adalah tempat titik tegangan Stress path s Stress path adalah cara yang lebih mudah digunakan untuk melihat Proses pembebanan dari awal sampai mencapai selubung keruntuhan 3
33 SELUBUNG KERUNTUHAN t failure tan -1 (sin ) c c cos stress path s During loading (shearing). 33
34 FIELD TEST VANE SHEAR Measure undrained shear strength of soil Suitable for very soft clay to medium stiff clay Principle of equipment operation : vane pushed and rotated The vane shear equation : s u = πd 3 T h d +1 3 Where: T : Maximum torque H : height of vane d : diameter of vane
35
36 Standard Penetration Test (SPT)
Theory of Shear Strength
SKAA 1713 SOIL MECHANICS Theory of Shear Strength Prepared by, Dr. Hetty 1 SOIL STRENGTH DEFINITION Shear strength of a soil is the maximum internal resistance to applied shearing forces The maximum or
More informationTheory of Shear Strength
MAJ 1013 ADVANCED SOIL MECHANICS Theory of Shear Strength Prepared by, Dr. Hetty 1 Strength of different materials Steel Concrete Soil Tensile strength Compressive strength Shear strength Complex behavior
More informationSOIL SHEAR STRENGTH. Prepared by: Dr. Hetty Muhammad Azril Fauziah Kassim Norafida
SOIL SHEAR STRENGTH Prepared by: Dr. Hetty Muhammad Azril Fauziah Kassim Norafida What is shear strength Shear strength of a soil is the maximum internal resistance to applied shearing forces Why it is
More informationSHEAR STRENGTH OF SOIL
SHEAR STRENGTH OF SOIL Necessity of studying Shear Strength of soils : Soil failure usually occurs in the form of shearing along internal surface within the soil. Shear Strength: Thus, structural strength
More informationChapter 5 Shear Strength of Soil
Page 5 Chapter 5 Shear Strength of Soil. The internal resistance per unit area that the soil mass can offer to resist failure and sliding along any plane inside it is called (a) strength (b) shear strength
More informationSHEAR STRENGTH OF SOIL
Soil Failure Criteria SHEAR STRENGTH OF SOIL Knowledge about the shear strength of soil important for the analysis of: Bearing capacity of foundations, Slope stability, Lateral pressure on retaining structures,
More informationSHEAR STRENGTH OF SOIL. Chapter 10: Sections Chapter 12: All sections except
SHEAR STRENGTH OF SOIL Chapter 10: Sections 10. 10.3 Chapter 1: All sections ecept 1.13 1.14 1.15 1.17 1.18 TOPICS Introduction Components of Shear Strength of Soils Normal and Shear Stresses on a Plane
More informationLaboratory Testing Total & Effective Stress Analysis
SKAA 1713 SOIL MECHANICS Laboratory Testing Total & Effective Stress Analysis Prepared by: Dr. Hetty Mohr Coulomb failure criterion with Mohr circle of stress 2 ' 2 ' ' ' 3 ' 1 ' 3 ' 1 Cot Sin c ' ' 2
More informationCh 4a Stress, Strain and Shearing
Ch. 4a - Stress, Strain, Shearing Page 1 Ch 4a Stress, Strain and Shearing Reading Assignment Ch. 4a Lecture Notes Sections 4.1-4.3 (Salgado) Other Materials Handout 4 Homework Assignment 3 Problems 4-13,
More information8.1. What is meant by the shear strength of soils? Solution 8.1 Shear strength of a soil is its internal resistance to shearing stresses.
8.1. What is meant by the shear strength of soils? Solution 8.1 Shear strength of a soil is its internal resistance to shearing stresses. 8.2. Some soils show a peak shear strength. Why and what type(s)
More informationProf. B V S Viswanadham, Department of Civil Engineering, IIT Bombay
56 Module 4: Lecture 7 on Stress-strain relationship and Shear strength of soils Contents Stress state, Mohr s circle analysis and Pole, Principal stressspace, Stress pathsin p-q space; Mohr-Coulomb failure
More information(Refer Slide Time: 02:18)
Geology and Soil Mechanics Prof. P. Ghosh Department of Civil Engineering Indian Institute of Technology Kanpur Lecture 40 Shear Strength of Soil - C Keywords: Shear strength of soil, direct shear test,
More informationD1. A normally consolidated clay has the following void ratio e versus effective stress σ relationship obtained in an oedometer test.
(d) COMPRESSIBILITY AND CONSOLIDATION D1. A normally consolidated clay has the following void ratio e versus effective stress σ relationship obtained in an oedometer test. (a) Plot the e - σ curve. (b)
More informationSoil strength. the strength depends on the applied stress. water pressures are required
Soil Strength Soil strength u Soils are essentially frictional materials the strength depends on the applied stress u Strength is controlled by effective stresses water pressures are required u Soil strength
More informationChapter (12) Instructor : Dr. Jehad Hamad
Chapter (12) Instructor : Dr. Jehad Hamad 2017-2016 Chapter Outlines Shear strength in soils Direct shear test Unconfined Compression Test Tri-axial Test Shear Strength The strength of a material is the
More informationTriaxial Shear Test. o The most reliable method now available for determination of shear strength parameters.
TOPICS Introduction Components of Shear Strength of Soils Normal and Shear Stresses on a Plane Mohr-Coulomb Failure Criterion Laboratory Shear Strength Testing Direct Shear Test Triaxial Compression Test
More informationReinforced Soil Structures Reinforced Soil Walls. Prof K. Rajagopal Department of Civil Engineering IIT Madras, Chennai
Geosynthetics and Reinforced Soil Structures Reinforced Soil Walls continued Prof K. Rajagopal Department of Civil Engineering IIT Madras, Chennai e-mail: gopalkr@iitm.ac.inac in Outline of the Lecture
More informationSHEAR STRENGTH OF SOIL UNCONFINED COMPRESSION TEST
SHEAR STRENGTH OF SOIL DEFINITION The shear strength of the soil mass is the internal resistance per unit area that the soil mass can offer to resist failure and sliding along any plane inside it. INTRODUCTION
More informationShear Strength of Soils
Shear Strength of Soils Soil strength Most of problems in soil engineering (foundations, slopes, etc.) soil withstands shear stresses. Shear strength of a soil is defined as the capacity to resist shear
More informationFoundation Analysis LATERAL EARTH PRESSURE
Foundation Analysis LATERAL EARTH PRESSURE INTRODUCTION Vertical or near-vertical slopes of soil are supported by retaining walls, cantilever sheet-pile walls, sheet-pile bulkheads, braced cuts, and other
More informationFollowing are the results of four drained direct shear tests on an overconsolidated clay: Diameter of specimen 50 mm Height of specimen 25 mm
444 Chapter : Shear Strength of Soil Example. Following are the results of four drained direct shear tests on an overconsolidated clay: Diameter of specimen 50 mm Height of specimen 5 mm Normal Shear force
More informationLateral Earth Pressure
1 of 11 6/2/2012 4:28 AM Lateral Earth Pressure The magnitude of lateral earth pressure depends on: 1. Shear strength characteristics of soil 2. Lateral strain condition 3. Pore water pressure 4. State
More information1.5 STRESS-PATH METHOD OF SETTLEMENT CALCULATION 1.5 STRESS-PATH METHOD OF SETTLEMENT CALCULATION
Module 6 Lecture 40 Evaluation of Soil Settlement - 6 Topics 1.5 STRESS-PATH METHOD OF SETTLEMENT CALCULATION 1.5.1 Definition of Stress Path 1.5. Stress and Strain Path for Consolidated Undrained Undrained
More informationSoil and Rock Strength. Chapter 8 Shear Strength. Steel Strength. Concrete Strength. Dr. Talat Bader May Steel. Concrete.
Chapter 8 Shear Strength Dr. Talat Bader May 2006 Soil and Rock Strength Unconfined compressive strength (MPa) Steel Concrete 20 100 250 750 0.001 0.01 Soil 0.1 1.0 10 Rock 100 250 F y = 250 to 750 MPa
More informationShear Strength of Soil
8 Shear Strength of Soil 8 1 INTRODUCTION As a structural member, a piece of steel is capable of resisting compression, tension, and shear. Soil, however, like concrete and rock, is not capable of resisting
More information2017 Soil Mechanics II and Exercises Final Exam. 2017/7/26 (Wed) 10:00-12:00 Kyotsu 4 Lecture room
2017 Soil Mechanics II and Exercises Final Exam 2017/7/26 (Wed) 10:00-12:00 Kyotsu 4 Lecture room Attention: The exam consists of five questions for which you are provided with five answer sheets. Write
More informationShear strength. Common cases of shearing In practice, the state of stress in the ground will be complex. Common cases of shearing Strength
Shear strength Common cases of shearing Strength Near any geotechnical construction (e.g. slopes, excavations, tunnels and foundations) there will be both mean and normal stresses and shear stresses. The
More informationShear Strength of Soils
Shear Strength of Soils STRESSES IN A SOIL ELEMENT t s v Analyze Effective Stresses (s ) Load carried by Soil t Where: s H t t s H s = t f = s v = s H = t = s v Stresses in a Soil Element after Figure
More informationModule 4 Lecture 20 Pore water pressure and shear strength - 4 Topics
Module 4 Lecture 20 Pore water pressure and shear strength - 4 Topics 1.2.6 Curvature of the Failure Envelope Effect of angularity of soil particles Effect of rate of loading during the test 1.2.7 Shear
More informationStress and Strains in Soil and Rock. Hsin-yu Shan Dept. of Civil Engineering National Chiao Tung University
Stress and Strains in Soil and Rock Hsin-yu Shan Dept. of Civil Engineering National Chiao Tung University Stress and Strain ε 1 1 2 ε 2 ε Dimension 1 2 0 ε ε ε 0 1 2 ε 1 1 2 ε 2 ε Plane Strain = 0 1 2
More informationModule 6 (Lecture 23) LATERAL EARTH PRESSURE
Module 6 (Lecture 23) LATERAL EARTH PRESSURE Topics 1.1 PASSIVE PRESSURE 1.2 RANKINE PASSIVE EARTH PRESSURE 1.3 RANKINE PASSIVE EARTH PRESSURE-INCLINED BACKFILL 1.4 COULOMB S PASSIVE EARTH PRESSURE 1.5
More informationShear Strength of. Charles Aubeny. Department of Civil Engineering Texas A&M University
Shear Strength of Shallow Soils Charles Aubeny Associate Professor Department of Civil Engineering Texas A&M University Issues 1. Relevant to practical problems Shallow slopes Organic soils Pipeline embedment
More informationChapter (7) Lateral Earth Pressure
Chapter (7) Lateral Earth Pressure Introduction Vertical or near vertical slopes of soil are supported by retaining walls, cantilever sheet-pile walls, sheet-pile bulkheads, braced cuts, and other similar
More informationProf. B V S Viswanadham, Department of Civil Engineering, IIT Bombay
51 Module 4: Lecture 2 on Stress-strain relationship and Shear strength of soils Contents Stress state, Mohr s circle analysis and Pole, Principal stressspace, Stress pathsin p-q space; Mohr-coulomb failure
More informationCh 5 Strength and Stiffness of Sands
Ch. 5 - Strength and Stiffness of Sand Page 1 Ch 5 Strength and Stiffness of Sands Reading Assignment Ch. 5 Lecture Notes Sections 5.1-5.7 (Salgado) Other Materials Homework Assignment Problems 5-9, 5-12,
More informationLandslide FE Stability Analysis
Landslide FE Stability Analysis L. Kellezi Dept. of Geotechnical Engineering, GEO-Danish Geotechnical Institute, Denmark S. Allkja Altea & Geostudio 2000, Albania P. B. Hansen Dept. of Geotechnical Engineering,
More informationChapter (11) Pile Foundations
Chapter (11) Introduction Piles are structural members that are made of steel, concrete, or timber. They are used to build pile foundations (classified as deep foundations) which cost more than shallow
More informationVALLIAMMAI ENGINEERING COLLEGE
VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CIVIL ENGINEERING SUBJECT CODE : CE6405 YEAR : II SUBJECT NAME : SOIL MECHANICS SEM : IV QUESTION BANK (As per Anna University 2013 regulation) UNIT 1- SOIL
More informationWelcome back. So, in the last lecture we were seeing or we were discussing about the CU test. (Refer Slide Time: 00:22)
Geology and Soil Mechanics Prof. P. Ghosh Department of Civil Engineering Indian Institute of Technology Kanpur Lecture - 43 Shear Strength of Soils Keywords: Triaxial shear test, unconsolidated undrained
More informationSoil Mechanics Prof. B.V.S. Viswanathan Department of Civil Engineering Indian Institute of Technology, Bombay Lecture 51 Earth Pressure Theories II
Soil Mechanics Prof. B.V.S. Viswanathan Department of Civil Engineering Indian Institute of Technology, Bombay Lecture 51 Earth Pressure Theories II Welcome to lecture number two on earth pressure theories.
More informationDeep Foundations 2. Load Capacity of a Single Pile
Deep Foundations 2 Load Capacity of a Single Pile All calculations of pile capacity are approximate because it is almost impossible to account for the variability of soil types and the differences in the
More informationQUESTION BANK DEPARTMENT: CIVIL SUBJECT CODE / Name: CE 2251 / SOIL MECHANICS SEMESTER: IV UNIT 1- INTRODUCTION PART - A (2 marks) 1. Distinguish between Residual and Transported soil. (AUC May/June 2012)
More informationChapter (3) Ultimate Bearing Capacity of Shallow Foundations
Chapter (3) Ultimate Bearing Capacity of Shallow Foundations Introduction To perform satisfactorily, shallow foundations must have two main characteristics: 1. They have to be safe against overall shear
More informationIntroduction to Soil Mechanics
Introduction to Soil Mechanics Sela Sode and Colin Jones WILEY Blackwell Contents Preface Dedication and Acknowledgments List of Symbols Soil Structure 1.1 Volume relationships 1.1.1 Voids ratio (e) 1.1.2
More information1.8 Unconfined Compression Test
1-49 1.8 Unconfined Compression Test - It gives a quick and simple measurement of the undrained strength of cohesive, undisturbed soil specimens. 1) Testing method i) Trimming a sample. Length-diameter
More informationSOIL MECHANICS Assignment #7: Shear Strength Solution.
14.330 SOIL MECHANICS Assignment #7: Shear Strength Solution. PROBLEM #1: GIVEN: Direct Shear test results from a SP soil shown in Figure A (from 14.330_2012_Assignment_#8_P1.csv on the course website).
More informationTectonics. Lecture 12 Earthquake Faulting GNH7/GG09/GEOL4002 EARTHQUAKE SEISMOLOGY AND EARTHQUAKE HAZARD
Tectonics Lecture 12 Earthquake Faulting Plane strain 3 Strain occurs only in a plane. In the third direction strain is zero. 1 ε 2 = 0 3 2 Assumption of plane strain for faulting e.g., reverse fault:
More informationLATERAL EARTH PRESSURE
. INTRODUCTION Retaining structures commonly used in foundation engineering, such as retaining walls, basement walls and bulkheads to support almost vertical slopes of earth masses. Proper design and construction
More informationFOUNDATION ENGINEERING UNIT V
FOUNDATION ENGINEERING UNIT V RETAINING WALLS Plastic equilibrium in soils active and passive states Rankine s theory cohesion less and cohesive soil - Coloumb s wedge theory condition for critical failure
More information(Refer Slide Time: 01:15)
Soil Mechanics Prof. B.V.S. Viswanathan Department of Civil Engineering Indian Institute of Technology, Bombay Lecture 56 Stability analysis of slopes II Welcome to lecture two on stability analysis of
More informationBrittle Deformation. Earth Structure (2 nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm
Lecture 6 Brittle Deformation Earth Structure (2 nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm WW Norton, unless noted otherwise Brittle deformation EarthStructure (2 nd
More informationGeology 229 Engineering and Environmental Geology. Lecture 5. Engineering Properties of Rocks (West, Ch. 6)
Geology 229 Engineering and Environmental Geology Lecture 5 Engineering Properties of Rocks (West, Ch. 6) Outline of this Lecture 1. Triaxial rock mechanics test Mohr circle Combination of Coulomb shear
More informationGeotechnical Parameters for Retaining Wall Design
11 th October 2012 Geotechnical Parameters for Retaining Wall Design Tanya Kouzmin 1 Most geotechnical failures are of retaining walls Are failure caused by WRONG calculations? Not usually calculation
More informationGEO E1050 Finite Element Method Mohr-Coulomb and other constitutive models. Wojciech Sołowski
GEO E050 Finite Element Method Mohr-Coulomb and other constitutive models Wojciech Sołowski To learn today. Reminder elasticity 2. Elastic perfectly plastic theory: concept 3. Specific elastic-perfectly
More informationpcf REQUIRED: Determine the shear strength parameters for use in a preliminary shallow foundation design. SOLUTION:
14.330 SOIL MECHANICS Assignment #8: Shear Strength Solution. PROBLEM #1: GIVEN: A regional residential building contractor is planning on building a custom 4,100 ft² home on Martha s Vineyard, MA. The
More informationChapter 12: Lateral Earth Pressure
Part 4: Lateral Earth Pressure and Earth-Retaining Structures Chapter 12: Lateral Earth Pressure Introduction Vertical or near-vertical slopes of soil are supported by retaining walls, cantilever sheetpile
More informationLATERAL EARTH PRESSURE AND RETAINING STRUCTURES
Topic Outline LATERAL EARTH PRESSURE AND RETAINING STRUCTURES Types of retaining structures Lateral earth pressure Earth pressure at rest Rankine s Theory Coulomb s Theory Cullman s graphic solution Braced
More informationGEOTECHNICAL ENGINEERING ECG 503 LECTURE NOTE ANALYSIS AND DESIGN OF RETAINING STRUCTURES
GEOTECHNICAL ENGINEERING ECG 503 LECTURE NOTE 07 3.0 ANALYSIS AND DESIGN OF RETAINING STRUCTURES LEARNING OUTCOMES Learning outcomes: At the end of this lecture/week the students would be able to: Understand
More informationboth an analytical approach and the pole method, determine: (a) the direction of the
Quantitative Problems Problem 4-3 Figure 4-45 shows the state of stress at a point within a soil deposit. Using both an analytical approach and the pole method, determine: (a) the direction of the principal
More information7. STRESS ANALYSIS AND STRESS PATHS
7-1 7. STRESS ANALYSIS AND STRESS PATHS 7.1 THE MOHR CIRCLE The discussions in Chapters and 5 were largely concerned with vertical stresses. A more detailed examination of soil behaviour requires a knowledge
More informationINTRODUCTION TO STATIC ANALYSIS PDPI 2013
INTRODUCTION TO STATIC ANALYSIS PDPI 2013 What is Pile Capacity? When we load a pile until IT Fails what is IT Strength Considerations Two Failure Modes 1. Pile structural failure controlled by allowable
More information3-BEARING CAPACITY OF SOILS
3-BEARING CAPACITY OF SOILS INTRODUCTION The soil must be capable of carrying the loads from any engineered structure placed upon it without a shear failure and with the resulting settlements being tolerable
More informationBonding at Particle Contacts. Suyud R. Karyasuparta. Keywords: cohesive bonding, particle contacts, sliding contacts, contact cohesion.
Karyasuparta Vol. 10 No. 4 Oktober 2003 urnal TEKNIK SIPIL Bonding at Particle Contacts Suyud R. Karyasuparta Abstract This investigation deals with the behavior of cohesive bonding at particle contacts
More informationFoundation Engineering Prof. Dr. N. K. Samadhiya Department of Civil Engineering Indian Institute of Technology Roorkee
Foundation Engineering Prof. Dr. N. K. Samadhiya Department of Civil Engineering Indian Institute of Technology Roorkee Module - 01 Lecture - 01 Shallow Foundation (Refer Slide Time: 00:19) Good morning.
More informationEARTH PRESSURES ON RETAINING STRUCTURES
12-1 12. EARTH PRESSURES ON RETAINING STRUCTURES 12.1 Active Pressure and Passive Pressure When a sudden change in level of the ground surface is to be provided for some purpose a retaining structure is
More informationEarth Pressure Theory
Lateral Earth Pressure Page 1 Earth Pressure Theory Examples of Retaining Walls Lateral Earth Pressure Page 2 At-Rest, Active and Passive Earth Pressure Wednesday, August 17, 2011 12:45 PM At-rest condition
More informationWith high enough plate forces in opposite directions Bolts. How do these fail? Each pin has sheared into two pieces.
SHEAR STRENGTH In general, the shear strength of any material is the load per unit area or pressure that it can withstand before undergoing shearing failure. Shearing When you Pins hear can Shear be used
More informationChapter (4) Ultimate Bearing Capacity of Shallow Foundations (Special Cases)
Chapter (4) Ultimate earing Capacity of Shallow Foundations (Special Cases) Ultimate.C. of Shallow Foundations (Special Cases) Introduction The ultimate bearing capacity theories discussed in Chapter 3
More information(Refer Slide Time: 04:21 min)
Soil Mechanics Prof. B.V.S. Viswanathan Department of Civil Engineering Indian Institute of Technology, Bombay Lecture 44 Shear Strength of Soils Lecture No.2 Dear students today we shall go through yet
More informationGeology 229 Engineering Geology. Lecture 5. Engineering Properties of Rocks (West, Ch. 6)
Geology 229 Engineering Geology Lecture 5 Engineering Properties of Rocks (West, Ch. 6) Common mechanic properties: Density; Elastic properties: - elastic modulii Outline of this Lecture 1. Uniaxial rock
More information8. STRENGTH OF SOILS AND ROCKS
8-1 8. STRENGTH OF SOILS AND ROCKS 8.1 COMPRESSIVE STRENGTH The strength of a material may be broadly defined as the ability of the material to resist imposed forces. If is often measured as the maximum
More informationThe Role of Slope Geometry on Flowslide Occurrence
American Journal of Environmental Sciences 3 (3): 93-97, 27 ISSN 1553-345X 27 Science Publications Corresponding Author: The Role of Slope Geometry on Flowslide Occurrence Chiara Deangeli DITAG, Politecnico
More informationThe Bearing Capacity of Soils. Dr Omar Al Hattamleh
The Bearing Capacity of Soils Dr Omar Al Hattamleh Example of Bearing Capacity Failure Omar Play the move of bearing Capacity failure The Philippine one Transcona Grain Silos Failure - Canada The Bearing
More informationProf. B V S Viswanadham, Department of Civil Engineering, IIT Bombay
50 Module 4: Lecture 1 on Stress-strain relationship and Shear strength of soils Contents Stress state, Mohr s circle analysis and Pole, Principal stressspace, Stress pathsin p-q space; Mohr-Coulomb failure
More information(Refer Slide Time 1:07 min)
Soil Mechanics Prof. B.V.S. Viswanathan Department of Civil Engineering Indian Institute of Technology, Bombay Lecture 46 Shear Strength of Soils Lecture No.4 Students we had 3 lectures so far on this
More informationFoundations with D f equal to 3 to 4 times the width may be defined as shallow foundations. TWO MAIN CHARACTERISTICS ULTIMATE BEARING CAPACITY
oundation Analysis oundations with D f eual to 3 to 4 times the width may be defined as shallow foundations. TWO MAI CHARACTERISTICS o Safe against overall shear failure o Cannot undergo excessive displacement,
More informationLecture 12: Slope Stability
Lecture 12: Slope Stability Key Questions 1. How do friction and cohesion work together to stabilize slopes? 2. What is trying to pull slope material down? 3. How does the slope angle play a role in slope
More informationInfluences of material dilatancy and pore water pressure on stability factor of shallow tunnels
Influences of material dilatancy and pore water pressure on stability factor of shallow tunnels YANG Xiao-li( ), HUANG Fu( ) School of Civil and Architectural Engineering, Central South University, Changsha
More informationSeismic Analysis of Retaining Structures. Nanjundaswamy P. Department of Civil Engineering S J College of Engineering, Mysore
Seismic Analysis of Retaining Structures Nanjundaswamy P. Department of Civil Engineering S J College of Engineering, Mysore pnswamy@yahoo.com Retaining Walls Retaining Walls. Where? Retaining Walls. Road
More informationMohr s Circle of Stress
Department of Civil Engineering Mohr s Circle of Stress by David Nash Department of Civil Engineering University of Bristol David.Nash@bristol.ac.uk 1 Principal planes and principal stresses Within any
More informationThe Frictional Regime
The Frictional Regime Processes in Structural Geology & Tectonics Ben van der Pluijm WW Norton+Authors, unless noted otherwise 1/25/2016 10:08 AM We Discuss The Frictional Regime Processes of Brittle Deformation
More informationYOUR HW MUST BE STAPLED YOU MUST USE A PENCIL (no pens)
Spring 2008 CIVE 462 HOMEWORK #1 1. Print out the syllabus. Read it. Write the grade percentages in the first page of your notes. 2. Go back to your 301 notes, internet, etc. and find the engineering definition
More informationEN Eurocode 7. Section 3 Geotechnical Data Section 6 Spread Foundations. Trevor L.L. Orr Trinity College Dublin Ireland.
EN 1997 1: Sections 3 and 6 Your logo Brussels, 18-20 February 2008 Dissemination of information workshop 1 EN 1997-1 Eurocode 7 Section 3 Geotechnical Data Section 6 Spread Foundations Trevor L.L. Orr
More informationRAMWALL DESIGN METHODOLOGY
RAMWALL DESIGN METHODOLOGY Submitted by:. June 005 CONTENTS 1. INTRODUCTION 1 Page. REFERENCED DOCUMENTS & ABBREVIATIONS 1 3 DESIGN METHODOLOGY / THEORY 3.1 General 3. Internal Analysis 4 3.3 External
More informationStudy of Pile Interval of Landslide Restraint Piles by Centrifuge Test and FEM Analysis
Disaster Mitigation of Debris Flows, Slope Failures and Landslides 113 Study of Pile Interval of Landslide Restraint Piles by Centrifuge Test and FEM Analysis Yasuo Ishii, 1) Hisashi Tanaka, 1) Kazunori
More informationSOIL MODELS: SAFETY FACTORS AND SETTLEMENTS
PERIODICA POLYTECHNICA SER. CIV. ENG. VOL. 48, NO. 1 2, PP. 53 63 (2004) SOIL MODELS: SAFETY FACTORS AND SETTLEMENTS Gabriella VARGA and Zoltán CZAP Geotechnical Department Budapest University of Technology
More informationGEOTECHNICAL PARAMETERS OBTAINED WITH NONLINEAR COMPUTATIONAL MODELS USED IN GEOTECHNICAL ENGINEERING PROBLEMS
INTERNATIONAL SCIENTIFIC CONFERENCE CIBv 2010 12 13 November 2010, Braşov GEOTECHNICAL PARAMETERS OBTAINED WITH NONLINEAR COMPUTATIONAL MODELS USED IN GEOTECHNICAL ENGINEERING PROBLEMS Iulia-Consuela MOLNAR*,
More informationJ. Paul Guyer, P.E., R.A.
J. Paul Guyer, P.E., R.A. Paul Guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure.
More informationSoil Mechanics Brief Review. Presented by: Gary L. Seider, P.E.
Soil Mechanics Brief Review Presented by: Gary L. Seider, P.E. 1 BASIC ROCK TYPES Igneous Rock (e.g. granite, basalt) Rock formed in place by cooling from magma Generally very stiff/strong and often abrasive
More informationPLANES OF WEAKNESS IN ROCKS, ROCK FRCTURES AND FRACTURED ROCK. Contents
PLANES OF WEAKNESS IN ROCKS, ROCK FRCTURES AND FRACTURED ROCK Contents 7.1 Introduction 7.2 Studies On Jointed Rock Mass 7.2.1 Joint Intensity 7.2.2 Orientation Of Joints 7.2.3 Joint Roughness/Joint Strength
More informationCompute the lateral force per linear foot with sloping backfill and inclined wall. Use Equation No. 51, page 93. Press ENTER.
Sample Problems Problem 5.1 A gravity retaining wall is supporting a cohesionless soil. The active lateral force per linear foot of the retaining wall is most nearly (A) 5,000 lb/ft (B) 6,000 lb/ft (C)
More informationFoundation Engineering Prof. Dr N.K. Samadhiya Department of Civil Engineering Indian Institute of Technology Roorkee
Foundation Engineering Prof. Dr N.K. Samadhiya Department of Civil Engineering Indian Institute of Technology Roorkee Module 01 Lecture - 03 Shallow Foundation So, in the last lecture, we discussed the
More informationINTERPRETATION OF UNDRAINED SHEAR STRENGTH OF UNSATURATED SOILS IN TERMS OF STRESS STATE VARIABLES
INTERPRETATION OF UNDRAINED SHEAR STRENGTH OF UNSATURATED SOILS IN TERMS OF STRESS STATE VARIABLES S. K. Vanapalli and D.G. Fredlund Department of Civil Engineering University of Saskatchewan, Saskatoon
More informationIntroduction to Geotechnical Engineering. ground
Introduction to Geotechnical Engineering ground 1 Typical Geotechnical Project Geo-Laboratory ~ for testing soil properties Design Office ~ for design & analysis construction site 2 Shallow Foundations
More informationTable 3. Empirical Coefficients for BS 8002 equation. A (degrees) Rounded Sub-angular. 2 Angular. B (degrees) Uniform Moderate grading.
Hatanaka and Uchida (1996); ' 20N 20 12N 20 ' 45 A lower bound for the above equation is given as; 12N 15 ' 45 Table 3. Empirical Coefficients for BS 8002 equation A Angularity 1) A (degrees) Rounded 0
More informationfile:///d /suhasini/suha/office/html2pdf/ _editable/slides/module%202/lecture%206/6.1/1.html[3/9/2012 4:09:25 PM]
Objectives_template Objectives In this section you will learn the following Introduction Different Theories of Earth Pressure Lateral Earth Pressure For At Rest Condition Movement of the Wall Different
More informationCite this paper as follows:
Cite this paper as follows: Naughton P.J. and O Kelly B.C. 2001. An overview of the University College Dublin hollow cylinder apparatus. Proceedings of the 14th Young European Geotechnical Engineer s Conference,
More informationModule 5: Failure Criteria of Rock and Rock masses. Contents Hydrostatic compression Deviatoric compression
FAILURE CRITERIA OF ROCK AND ROCK MASSES Contents 5.1 Failure in rocks 5.1.1 Hydrostatic compression 5.1.2 Deviatoric compression 5.1.3 Effect of confining pressure 5.2 Failure modes in rocks 5.3 Complete
More informationFUNDAMENTALS SOIL MECHANICS. Isao Ishibashi Hemanta Hazarika. >C\ CRC Press J Taylor & Francis Group. Taylor & Francis Group, an Informa business
SOIL MECHANICS FUNDAMENTALS Isao Ishibashi Hemanta Hazarika >C\ CRC Press J Taylor & Francis Group Boca Raton London New York CRC Press is an imprint of the Taylor & Francis Group, an Informa business
More information9 Stresses. 9.1 Stress states in silos
9 Stresses The knowledge of the stresses prevailing in bulk solids, especially when being stored in bins and silos, is extremely important when considering the following topics: Silo design for flow (e.g.,
More information