زمین‌گیر! نمایش‌های شگفت‌انگیز در کلاس درس در مکانیک خاک (انتشارات ASCE)

"Elton presents 35 serious but entertaining experiments for budding scientists and engineering students that teach the fundamentals of soil mechanics and illustrate the dynamics of how soils behave and how they can be manipulated."-- Abstract: "Elton presents 35 serious but entertaining experiments for budding scientists and engineering students that teach the fundamentals of soil mechanics and illustrate the dynamics of how soils behave and how they can be manipulated." Cover 1 Contents 6 Preface 8 Acknowledgments and Contributors 11 Soils Magician Accreditation Procedure 13 Video Demonstrations 14 Magic Demonstrations 16 1 Exploding Soils (Extreme Slaking) 16 2 Rice Is Nice (an Exercise in Pile Capacity) 22 3 Break that Block (the Power of Bentonite) 27 4 A Retaining Wall Made of Paper 32 5 Slip Slidin’ away with Effective Stress 40 6 Magic Beaker (Sand Defies Gravity) 46 7 Effective Potato Chips 50 8 Foam Balls in a Pipe (Soil Arching) 56 9 Geotechnical Rorschach Test (Water Flows around a Drain, instead of into the Drain) 61 10 Hairy Soil 66 11 Sand Cylinder Hoisting 70 12 Water That Won’t Go through a Sieve (and Water That Does) 75 13 Dilation in Someone’s Hand (Silty Soil Identification) 80 14 Piping Under a Sheetpile Dam 85 Non-Magic Demonstrations 91 15 Jar of Rocks (Soil Void Ratio, Porosity, Unit Weight, and Water Content of Soils) 91 16 Liquefaction by Upward Gradient 97 17 Blow It Out (Critical Hydraulic Gradient) and Flowlines 105 18 Relative Density of Soil in a Graduated Cylinder 114 19 Soil Filter Demonstration Using Marbles 119 20 Sand in a Jar (Strong as You Are) 126 21 Shear and Compression Waves 130 22 Soil Bridge in a Tube 135 23 Capillarity and Cotton Balls (Bonus: Nonwoven Geotextile Strength Demonstration) 140 24 Stick-Slip Behavior 147 25 Tilt Me up Scotty (Interface Friction) 151 26 Soils Relaxing (the Angle of Repose) 157 27 Falling Head over Heels for Permeability (the Permeability of Oobleck) 160 28 Bulking of Soils (AKA: Less Soil for Your Money) 164 29 Geotextile Puncture Test 170 30 Soil Dilation and Compaction Using Ping Pong Balls 175 31 Campus Geology Tour 178 32 Settlement Rates of Soils in Jars 180 33 Bearing Capacity (Bigger Is Better) 184 34 Retaining Wall in a Box 191 35 Rockfall Simulator Lab 196 Bibliography 202 Index 204 A 204 C 204 D 204 E 204 F 204 G 205 H 205 I 205 L 205 P 205 Q 205 S 205 T 205 U 205 V 205 W 205 About the Author 206 Content: Exploding soils -- Rice is nice : an exercise in pile capacity -- Break that block : the power of bentonite -- A retaining wall made of: paper! -- Slip slidin' away with effective stress -- Magic beaker: sand defies gravity -- Effective potato chips -- Foam balls in a pipe : soil arching -- Geotechnical Rorschach test (water flows around a drain, instead of into the drain) -- Hairy soil -- Sand cylinder hoisting -- Water that won't go through a sieve water that does -- Dilation in someone's hand: (silty soil identification) -- Piping under a sheetpile dam -- Jar of rocks : soil void ratio, porosity, unit weight and water content of soils -- Liquefaction by upward gradient -- Blow it out : critical hydraulic gradient. flowlines -- Relative density of soil in a graduated cylinder -- Soil filter demonstration using marbles -- Sand in a jar, strong as you are -- Slinky shear waves (and compression ones, too!) -- Soil bridge in a tube -- Capillarity and cotton balls, plus (bonus!) non-woven geotextile strength demonstration -- Stick slip behavior -- Tilt me up Scotty : interface friction -- Soils relaxing : the angle of repose -- Falling head over heels for permeability : the permeability of ooblech -- Bulking of soils : aka, less soil for your money -- Geotextile puncture test -- Soil dilation and compaction using ping pong balls -- Campus geology tour -- Settlement rates of soils in jars -- Bearing capacity : bigger is better -- Retaining wall in a box -- Rockfall simulator lab. Dave Elton has done it again! Exploding soils Retaining walls made of paper Gravity defying sand! Grounded! Amazing Classroom Demonstrations in Soil Mechanics presents 35 serious but entertaining experiments that teach the fundamentals of soil mechanics to budding scientists and engineering students in an exciting and novel way. In this sequel to the popular Soils Magic, Elton has assembled a wealth of fascinating new experiments to illustrate the dynamics of how soils behave and how they can be manipulated. Topics slaking, pile capacity, swelling clays, shear and compression, effective stress, capillary tension and flow, soil arching, tensile and compressive strength, soil identification, piping, liquefaction, relative density, soil filters, settlement rates, and many more. Each demonstration includes easy-to-follow directions, illustrations, and an explanation of the engineering significance or application of the principle demonstrated. Videos of many experiments are also available. An exciting tool for high-school and college instructors, the inexpensive and simple experiments in this book make soil mechanics fun to learn and are fascinating to even the casual science enthusiast. "Elton presents 35 serious but entertaining experiments for budding scientists and engineering students that teach the fundamentals of soil mechanics and illustrate the dynamics of how soils behave and how they can be manipulated."-- Provided by publisher