Some geotechnical properties of the main carbonate lithologies within the carboniferous limestone formation at the Clifton Gorge, Bristol

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Geomechanics Abstracts

General 775001 E~GINEERI~ PROBLEMS ASSOCIRPED Wi'A~ GROUND CO~DITYONS IN TKE MIDDLE EAST. A REPORT ON A STMPOSII~ CF THE E ~ G I S ~ I N G GROUP OF THE GECg~GICAL SOCIETY H~kine, A B Emgng Geol, VI0, N~, July 197 7, P23-28 Briefly discusses the 9 papers ;resented at the ~si~, held in November 1976, on the follcwir~ st~Jects: solid geology, ear1~hquake ri~k, nearsurface geolm~y, road amd airfield construction, c a n a l s add i r r i g a t i o n , o f f s h o r e s t r u c t u r e s , docks a=d h a r b o u r s , a n i sewage schemes. 775002 G ~ N F I N I ~ ELEMENT ANALOG OF FROST ~EAVE Gu~m~a, G L; Berg, R L Proc 2rd Co~e~'en~e on Soil-Water Problems in Cold Re~iona, Edmonton, Sept 1976, PIII-113 775003 INTRODUCTION TO ROCK MECHANICS (IN RUSSIAN) E~shOv, L V; M~ksimov, V A MOSCOW: Nedra, 1976, 221P 775oo4 C~CULATINS FROST ~ A V E OF FRE~ZaNS O ~ O m ~ ( I ~

Ershc~, E D; Shevchenko, L V; Lebede~ko, I P Zabaik Fil Zap, VIOl, 1975, P63-73

Properties of Rocks and Soils 775005 ROCK MECHANICS LABORATOHY TESTING IN THE CONTEXT OF A CONSULTING ENGINEerING ORGANYSATION Hock, E Int J Rock Mech Min Sci, VI~, N2, March 1977,

~-zoz Discusses the point load test, slake durability test, field shear test, in s t t ~ shear test, large s~ecimen shear t e s t S , ~rlaxiai t e ~ i ~ of graz~lar m a t e r i - l s , u n i a x i a l ccml~essic~ tests, t~iaxisl compression tests, aniso~ropic triaxial c~A~easion tests, triaxial shear testa, creep tests, s t i f f machine t e s t s a n i s c a l e d material model tests, a~i la~s down some general gnidelines for rock mechanics testim~ for a comaultimg orgamisation. ' "~5OO6 INVESTIGATION C~ T~E SCALE INVARIAIT; ~K)~;~W~IES OF FAILURE Brad~, B T Ira% J ROck Mech Min SOl, VI~, N3, May 1977, The i ~ u s i o n theory of failure l~edicts that seismicity l~ecursc~s (selmmicity increase

followed by aeismicity d e c r e ~ s c in the immediate vicinity of an impemdlr~ failure) will ~recede failure. A ~ec~rscr is defined as an effect ~rc~uced within a physical system which im~icates that the process lee~i~ to failure Of the system has begun. A key l~edlction o f the inclusion thecCy i s that the l~ocess of failt~re is scale imveriant, cr e i m ~ , the same l~hysicel l~ocesses are operative on the ~ scale (la~cwatc~y), intermediate scale (mine f a i l , e), ex~ large ecale (earthquake). Experimexfcal evidmmce is presented in this a r t i c l e ahewlr~ that a m ~ l ~ ~elamleity ~rece~es failures Of rock on ~he la~c~atc~y scale, rock bursts in mines, and earthquakes. Auth. C(~RELATION OF C~T~IN PHYSICO-~CHANICAL PROPERTIES OF MINE ROCKS Micra, G B J Mimes Metals Fuels, V2~, N6, June 1976,

~9~-~-~ Reports some salient physico-mechanical properties such as 1~laxlal ccm~cesaive streDgth, tensile stremgth~ m~lulus of elasticity, Protodyako-ov index anl c~c~e hardness of some I~dlan mine rocks. Linear re.latiomships were found between the compressive s t r e ~ and the tensile s t r e z ~ , mcdul~ of elasticity, l~todyakonov imdex a~i Shc~e hezd/~ae, elthcu~h t h e r e was a large scatter o f points i n t h e cases of modulus of elasticity amd hardness. The ratio of tensile to ccml~essive strer~th was found to be constant fc~ atrom~ rocks, amd the ratio of modulus of elasticity %o compressive atre~th was found to "be constant irrespective of rock s t r e z ~ . These last %wo fiz~limgs ere at variance with the results of earlier work. 775008 STUDYII~ FROST DESICCATION PROCESSES AI~ THEIR EFFECT ON MECHANICAL PRO~ra',~:S OF FRO2EN ROCKS OF DnmnmE~T GEOLOGIC-GEnETiC COMm~XES (IN Kauchukov, E Z; Vrachev, V V; Mimkim, M A Zabaik Fil Zap, V104, 1975, P@O-95 775009 SOME GEOTECHNICAL PROPERTIES OF THE MAIN CARBONATE LITHC~OGIES WITHIN THE CARBOhAr~ROUs LIMESTONE FC~4ATION AT THE CLI~TON ~ E , BRISTOL A1-Jasser, S; Hawkimss A B Proc Comferemce on Rock Emgimeerim~ (Newcastleupon-Tyrm, 4-7 Alm~il 1977)I P393-405 SOme l ~ e l ~ m 1 ~ y r e s u l t s e r e ~ r e s e n t e d o f t e s t s c a r r i e d o u t i n e r d e r t o e s t a b l i s h acme o f t h e b a s i c r o c k p e r a m e t e r s o f t h e C a r b o n i f e r o u s T~-~s t o n e o f t h e B r i s t o l d i s t r i c t . A s a n e~ample of t h e work b e i ~ u ~ d e r t a k e n , f i v e c s r b o m t e l l t h o l o g i e s a r e d i s c u s s e d i n ~ h i s paper: shelly, c r i n o i d a l , impure, o o l i t i c - l i m e s t o n e and d o l o m i t e . The c s r b o m t e t ~ e e a r e u s u a l l y ~istinct i n t h e h a ~ specimen and, i n t h e c a s e o f t h e s h e l l y (bra~htolxxl) l l m e s ~ o n % h a v e a n a n i s o ~ o p l c t e x t u r e . The f o l l c w t ~ c r i t e r i a a r e r e c o r d e d : bac~om~ geology, s;eclfic petrogral~kV, rook chemistry - Including the p e r c e m ~ e a~i mature o f rock resides, Ixrosity, velocity, Imiaxial umconflned ecm;reeaive stre:~th amd modulus of

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elasticity. The velocity, uniaxial unconfined compressive strength add modulus tests were perf(m-med in three directions, parallel to the bedding, vertical to the bedding ani oblique (about 45 deg) to the bedding. 775010 D E V E L O P M ~ OF N O N D E S ~ I V E EVALUATION TECHNIQUES FOR LARGE ROCK SPECIMENS Foster, B E; Smyder, S D; McClumg~ R W

investigation show that a single unique sampling pro@ram f ~ all geographic sites is mot practical. In the study, X-ray radiography techniques were used and found to be a valuable non-destructive tool for assessing "the extent of sampling disturbance ard other anomalies of the sample. Avail: University Microfilms, 18 Bedford Row, London WCIR ~EJ, UK

US~ ~ R 120-76, 1 June 1975, 72P(ORNL¢M4899) ~-voltage r~ilogral~ was performed on specimens of limestone, shale, ar~ ear, stone, both Unstressed a~1 stressed by one of four selected expansion -~-1~ors. Experiments were conducted to optimize the techniques for producing the radiographs and the quantitative microdemsit~metry on radiographs of stressed add unstressed blocks. A unique microdemsltcmetry scaring ~ data prOcessing s y s t e m u s i ~ c o r r e l a t i o ~ t e c h n i q u e s was d e v e l o p e d so that a subtle differense previously unobservable c o u l d b e extracted from t h e background arzl r e c o r d e d . Experiments w e r e comducted on simple beam spealmens of limestone stressed in both c c ~ e s s i o n and tension to develop an unleratanding of 'the radiographic phenomenon, and quantitative relatior--~Ips b e ~ e e n changes in X-ray 12"sinsmission and stress. Avail: NTIS, Springfield, Va, 22161, USA 775011 PORE WATER PRESSURE COEFFICIEI~S IN ORGANIC SOILS Abo-Elela, R M Ph D thesis, Wayne State Un~v, 1975, 237P To study the stress-strain-pore water pressure behaviour of organic soils, a goverDing equation for lx~e pressure development in the soil was derived'; This equation can be used for the usual s t r e s s ~ a t h amd for the devlatoric s t r e s s p a t h . This function was verified experimentally by pe~'fc~ming consolidated ~xlraimed trlaxlal tests on saturated cyll~lers of organic s1.1t, amorphous ~rs~mAler peat a ~ fibrous p e a t . Strese-et~in-lx~e pressure data for different tests at different consolidation pressures and stress rates were analyzed to v e r i f y the p r o p o s e d f u n c t i o n i n a~M~Al~ion t o t h e e x i s t i ~ Pore p r e s s u r e func~loms. The p e r a m e t e r s o f t h e p o r e p r e s s u r e o f t h e p r o posed amd e x i s t i n g f u n c t i o n s were d e t e r m i n e d amd . h a l ymed. Avail: University Microfilms, 18 Bedford Row, London WCIR ~EJ, UK 775012 ~'~'a~TS (R~ CONVENTIONAL SOIL SAMPLING ~E~fHODS ON THE E~INEERING PROPERTIES OF COHESIVE SOILS IN LOUISIANA McMamis, K L Ph D thesis, Louisiana State Univ amd A~rlculrural a,xl Mechanical College, 1975, 378P A comprehensive .study of the methods arD equipment used for soil samplimg in Louisiana has bean conducted. The effects of various sampliog amd harAlllng methods on the eD~ineerIDg p r o p e r t i e s of cohesive ~olls were e~amim~1. The types of samples studled included block samples, 0sterberg samples and thin-wall shelby ~1~les (Sin and 3 I n diameter). The s e l e c t i ~ , o f t h e u.m~lL~g sites was based on an a ~ to find soils which would be conducive to a study on sampli~ also would b e representatlve of ma1~rlal e~coumfeted by soil eE~ineers in this area. The soils sampled in the study varied in geologic a~e, ec~position amd s~rUctureT The results of the

775013 ELASTO-PLASTIC CONSTITUTIVE THEORY FOR A QUARTZ SAND AND ITS APPLICATION TO ANCHOR P R O ~ S Ai-Rashid, Y Ph D thesis, Colorado State Univ, 1975, 212P An elasto-plastic constitutive theory was developed for a uniform quartz samd on the basis of available e x p e r i m e n t a l data. The theory reflects t h e followlrg characteristics of sand behaviour determined by the A~lysls of the experimental data: initial stress deper~ent elastic modull, a yield condition best described by the Mohr-Coulc~b yield criterion, plastic flow that is neither normal nor incoml~esslble, ~ 8t~aln-sc~tenlr~ post-yiel~1 behaviom-. Usimg the finite element method, the theory was applied in the solutlon of s~char ~roblems for which labc~atary modelling results were avallable. Comparison of mathematical results with experimental data led to The conclusion that the constitutive theory accurately simulates the actual bmhavlour of the samd in which the anchors were embedded. The reliability of anchor design methods used in currant practice was ex-~ned. It was determined that these methods generally temd t o over'e s t i m a t e soil streDgth. The o v e r e s t i m a t i o n reaches unacceptable proportions for relatively deep anchors (over 700 per cent in one of the eases

stu~ed)~ Avail: University Microfilms, Lotion WCIR 4EJ, UK

18 Bedford Row,

Texture, structure, composition and density 775014 STATISTICAL I I ~ E T A T I O N OF DISCO~TI~.I~ITY CONTOUR DIAGRAMs Zambak, C Int J Rock Mech Min Sci, V14, N3, May 1977, Plll-120 A method is proposed for the d ~ i o n of dlacontlrmlties based on geologlcal data collected i n t h e f i e l d t~h~t can b e used i n s t a b i l i t y analysis with s e v e r a l statistical c o n f i d e n c e limits. This meth~1 is a l~ocedure for the interl~etatic~ of contour diagrams in structtzrmi geology, takim6 the theory of l~Obability into a c c o u n t . The method p r o v i d e s a u s e f u l approach to obtain the probable occurrence of rock blocks with a cc~Ated factor of safety and as a ftmctio~ of two p r o p o s e d distribution ir~11ces. 775015 DESCRIBING THE SIZE OF DISCONTIIr01TIES Cr~em, D M Im~ J Rock Mech M_In Sci, VI~, N3, May 1977, n33-137 The t r a c e l e n g t h s o f d i s c o n t i r m t i e s from Ncha~ga Open P i t a r e a sample from a cemsored n e g a t i v e e x p o m e n t i a l d i s t r i b u t i o n . Censoring p r o b a b l y o c c u r s a t b e n c h e s on t h e mimes w a l l s which obscure the traces of the disc~t~,~ties. The largest trace lemgth of a discontinuity in