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DESCRIPTIVE TERMINOLOGY & SOIL CLASSIFICATION <br /> SPT EXPLORATIONS: ANGULARITY OF GRAVEL&COBBLES <br /> STANDARD PENETRATION TESTING IS ANGULAR COARSE PARTICLES HAVE SHARP <br /> PERFORMED BY DRIVING A 2—INCH O.D.SPLIT- EDGES AND RELATIVELY PLANE SIDES <br /> SPOON INTO THE UNDISTURBED FORMATION AT ! j WITH UNPOLISHED SURFACES. ( € <br /> THE BOTTOM OF THE BORING WITH REPEATED <br /> BLOWS OF A 140—POUND PIN GUIDED HAMMER SUBANGULAR E COARSE GRAINED PARTICLES ARE <br /> FALLING 30 INCHES.NUMBER OF BLOWS(N SIMILAR TO ANGULAR BUT HAVE <br /> VALUE)REQUIRED TO DRIVE THE SAMPLER A ROUNDED EDGES. <br /> GIVEN DISTANCE WAS CONSIDERED A MEASURE <br /> OF SOIL CONSISTENCY. <br /> SURROUNDED COARSE GRAINED PARTICLES HAVE <br /> NEARLY PLANE SIDES BUT HAVE WELL <br /> SH SAMPLING: ROUNDED CORNERS AND EDGES. <br /> SHELBY TUBE SAMPLING IS PERFORMED WITH A ROUNDED COARSE GRAINED PARTICLES HAVE <br /> THIN WALLED SAMPLER PUSHED INTO THE SMOOTHLY CURVED SIDES AND NO <br /> UNDISTURBED SOIL TO SAMPLE 2.0 FEET OF EDGES. <br /> SOIL. <br /> AIR TRACK EXPLORATION: SOIL MOISTURE MODIFIER <br /> TESTING IS PERFORMED BY MEASURING RATE DRY ABSENCE OF MOISTURE;DUSTY,DRY <br /> OF ADVANCEMENT AND SAMPLES ARE TO TOUCH <br /> RETRIEVED FROM CUTTINGS. <br /> MOIST DAMP BUT NO VISIBLE WATER <br /> HAND AUGUR EXPLORATION: <br /> TESTING IS PREFORMED USING A 3.25" WET VISIBLE FREE WATER <br /> DIAMETER AUGUR TO ADVANCE INTO THE EARTH <br /> AND RETRIEVE SAMPLES. WEATHERED STATE <br /> DRIVE PROBE EXPLORATIONS: <br /> FRESH NO VISIBLE SIGN OF ROCK MATERIAL <br /> ( WEATHERING;PERHAPS SLIGHT <br /> THIS"RELATIVE DENSITY"EXPLORATION DEVICE DISCOLORATION IN MAJOR <br /> IS USED TO DETERMINE THE DISTRIBUTION AND DISCONTINUITY SURFACES. <br /> ESTIMATE STRENGTH OF THE SUBSURFACE SOIL ; <br /> AND DECOMPRESSED ROCK UNITS.THE <br /> RESISTANCE TO PENETRATION IS MEASURED IN SLIGHTLY DISCOLORATION INDICATES <br /> BLOWS-PER-1/2 FOOT OF AN 11-POUND HAMMER WEATHERED WEATHERING OF ROCK MATERIAL AND <br /> WHICH FREE FALLS ROUGHLY 3.5 FEET DRIVING DISCONTINUITY SURFACES.ALL THE <br /> THE 0.5 INCH DIAMETER PIPE INTO THE GROUND. ' ROCK MATERIAL MAY BE DISCOLORED <br /> BY WEATHERING AND MAY BE <br /> FOR A MORE DETAILED DESCRIPTION OF THIS SOMEWHAT WEAKER EXTERNALLY <br /> GEOTECHNICAL EXPLORATION METHOD,THE THAN ITS FRESH CONDITION. <br /> SLOPE STABILITY REFERENCE GUIDE FOR <br /> NATIONAL FORESTS IN THE UNITED STATES, <br /> VOLUME I,UNITED STATES DEPARTMENT OF MODERATELY LESS THAN HALF OF THE ROCK <br /> AGRICULTURE,EM-7170-13,AUGUST 1994,P.317- WEATHERED MATERIAL IS DECOMPOSED AND/OR <br /> 321. DISINTEGRATED TO SOIL. FRESH OR <br /> DISCOLORED ROCK IS PRESENT EITHER <br /> CPT EXPLORATION: AS A CONTINUOUS FRAMEWORK OR AS <br /> CORE STONES. <br /> CONE PENETROMETER EXPLORATIONS CONSIST _ <br /> OF PUSHING A PROBE CONE INTO THE EARTH , HIGHLY MORE THAN HALF OF THE ROCK <br /> USING THE REACTION OF A 20-TON TRUCK.THE WEATHERED MATERIAL IS DECOMPOSED AND/OR <br /> CONE RESISTANCE(QC)AND SLEEVE FRICTION DISINTEGRATED TO SOIL. FRESH OR <br /> DISCOLORED ROCK IS PRESENT EITHER P(FS)USHED INNTOO THE <br /> EDE EARTH. <br /> H THE VALUES OF QC ARE T AS DISCONTINUOUS FRAMEWORK OR <br /> H PROBE WAS <br /> AND FS(IN TSF)ARE NOTED AS THE LOCALIZED ' ; AS CORE STONE. <br /> INDEX OF SOIL STRENGTH. <br /> COMPLETELY ALL ROCK MATERIAL IS DECOMPOSED <br /> WEATHERED j AND/OR DISINTEGRATED TO SOIL. THE <br /> ORIGINAL MASS STRUCTURE IS STILL <br /> LARGELY INTACT. <br /> RESIDUAL SOIL ALL ROCK MATERIAL IS CONVERTED TO <br /> SOIL. THE MASS STRUCTURE AND <br /> , MATERIAL FABRIC IS DESTROYED. <br /> THERE IS A LARGE CHANGE IN VOLUME, <br /> BUT THE SOIL HAS NOT BEEN <br /> SIGNIFICANTLY TRANSPORTED. <br /> 2c., I 34 <br />