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Effect of radiation damping on earthquake response of pile-supported offshore platforms
201A
rock~ irrespective of the deformation history of the crushed material. The defcrmation properties of crushed granite and sandstone are of a Brittle nature. Crushed rock powder can reconsolidate at pressures considerably lower than the contact pressure urzler a button of a drill or disc cutter - explaining the occurrence of compacted crescents.
836278 EFFECT OF RADIATION DAMPING ON EA/WI~JAKE RESPONSE OF F I L E - ~ OFFSHORE FLATFORMS Nogami, T; Idriss, I M; Power, M S Earthq Engng Struct Dynam, Vll, N3, May-June
1983, P337-353 836279 SEISMICALLY INDUCED M ~ OF RETAIN!r~ WAILS Nadim, F; Whitman, H V J Geotech Emgng Div ASCE, V109, NGT7, July
83628~ ENHANC~T~f
1983, P915-9~
OF CAVITATION DAMAGE AND ITS USES IN ROCK DISINTEGRATION Mazlxrkiewicz, M; Stmmm_rs, D A In: Sixth International Symposium on Jet Cutting Technology, University of Surrey, 6-8 April 1982, P27-38. Publ Cranfield: BHRA, 1982
In recent years, new seismic design methods for gravity retaining walls, based on the earthquakeinduced permanent displacement of the wall, have been proposed. These methods generally ignore the effects of ground motion amplification in the backfill on the seismic behaviour of the wall. In the present paperj results obtained with a finite element model cal~ble of taking into account the amplification of grourzl motion in the backfill, while ccm~puting permanent distortions, are ~esented. Implications of these results fer design are also considered. Auth.
Cavitation can be used in the disaggregation of mineral bearirg rock into its constituent grains. Experiments were carried out on rock samples in a modified Lichtarc~icz Cell to demorr strate this. Results indicated that comminution of the rock was very slow ard several methods were tried to increase the cavitation damage. The use of 2 converging cavitating Jets and pulsation of the test chamber pressure were found to be 2 effective methods.
836280 DESIGN AND PERFORMANCE OF HEAVILY LOADED PILES IN A HIGH-RISK EARTHQUAKE ZONE Watson, G H; Williams~ R S; Chun Chiu Yam Can Geotech J, V20, N2, May 1983, P262-275
836285 COMBINED
METHOD OF ROCK BREAKAGE Kuzmich, I A; Goldin, J A; Ruthberg, M I In: Sixth International Symposium on Jet Cutting Technology, University of Surreyj 6-8 April 1982, F301-321. Publ Cranfield: ~HRA, 1982
A major petrochemical facility is being constructed on the West Coast of Trinidad which is in an area of high seismic activity. An extensive programme was carried out to select the best design fer the pile foundations. This included theoretical predictions of axial and lateral load capacity and field loading tests. Predicted and measured pile capacities were compared.
Examines the hydromechanical breakage of rock and coal, i e a method using the simultaneous action of a water Jet and a mechanical tool. Experimental results obtained both in laberatcries and in situ are presented.
836281 ANALYSIS OF LANDSLIDES DURING THE 1978 IZUOHSHIMA-EINKAI EARTHOUAEE I ahihara, K; Nagao, A Soils Found, V23, NI, March 1983, P!9-37 Undisturbed samples of volcanic clay were obtained in blocks from the surface of the deposit considered responsible fer the slide. A series of dymamic triaxial tests were perfc~med by applying irregular axial loads to determine the soil strength urder seismic loading conditions. The results were expressed in terms of the Mohr-Coulc~b failure criterion. A pseudo-static analysis was then carried out to check the stability of the soil masses that had slld in the earthquake.
Drilfing 836286
DRI-LLIq~ OF ROCKS WITH ROTATING HIGH PRESSURE WATER JETS: INFLUENUE OF ROCK PROPm~I±ES Vi~ay, M M; Brierley, W H; Grattan-Bellew, P E In: Sixth International Symposium on Jet Cutting Technology, University of Surrey, 6-8 April 1982, I=179-198. Publ Cranfield: ~HRA, 1982 Tests were carried out on unconfined blocks of granite, limestone a~d marble using a series of dual orifice nozzles consisting of a central crifice and a secor~ orifice located at a radius of 5.8ram. The area of the outer orifice w~s varied systematically to allow 50 to 70 per cent of the total available flcw. The tests were conducted at pressures up to 6~MPa and 3 different rotatiomal speeds. Results indicate that: (I) optimum nozzle configuration depends on the mlcro-l~Operties of the rock, (2) the specific energy decreases considerably with increased pressure, and (3) quite low rotation speeds are close to the optimum situation.
Comminution of Rocks 836282 SIXTH
INTERNATIONAL SYMPOSYL~ ON JET CUTI~NG TECHNOI/DT, UNYVERSITY OF SURREY, 6"8 A~RIL
1982 Cranfield: BHRA, 1982, 524P See separate entries for selected individual papers.
836283
BEHA~OUROFTRECRUSH~DZONE ~CHNIC~NOTE Lind~iet, P A; ~ i H a i - H ~ Rock M e c h R o c k Engng, ~ 6 ,
Blasting
INROCKI~ENTATION.
8~2~ ~,
Aug 1983,
~99-2~
I ~ I C T I O N OF GROUND VIBRATIONS FROM BLASTING ON OPENCAST SITES. TECHNTCAL NOTE Birch, W J; Chaffer, R Trans Inst Min Mstall (Sect A Min Ind), %"92,
April 1983, PAIO3-AI07 Micro hardness tests on compressed, crushed rock indicate that the plastic behaviour of powder of ductile rocks resembles that of intact
@~ivariate a~alysis performed with the aid of a microcomputer has been used to predict the Peak Particle Velocity (PPV) from pattern blasts.
rock~ irrespective of the deformation history of the crushed material. The defcrmation properties of crushed granite and sandstone are of a Brittle nature. Crushed rock powder can reconsolidate at pressures considerably lower than the contact pressure urzler a button of a drill or disc cutter - explaining the occurrence of compacted crescents.
836278 EFFECT OF RADIATION DAMPING ON EA/WI~JAKE RESPONSE OF F I L E - ~ OFFSHORE FLATFORMS Nogami, T; Idriss, I M; Power, M S Earthq Engng Struct Dynam, Vll, N3, May-June
1983, P337-353 836279 SEISMICALLY INDUCED M ~ OF RETAIN!r~ WAILS Nadim, F; Whitman, H V J Geotech Emgng Div ASCE, V109, NGT7, July
83628~ ENHANC~T~f
1983, P915-9~
OF CAVITATION DAMAGE AND ITS USES IN ROCK DISINTEGRATION Mazlxrkiewicz, M; Stmmm_rs, D A In: Sixth International Symposium on Jet Cutting Technology, University of Surrey, 6-8 April 1982, P27-38. Publ Cranfield: BHRA, 1982
In recent years, new seismic design methods for gravity retaining walls, based on the earthquakeinduced permanent displacement of the wall, have been proposed. These methods generally ignore the effects of ground motion amplification in the backfill on the seismic behaviour of the wall. In the present paperj results obtained with a finite element model cal~ble of taking into account the amplification of grourzl motion in the backfill, while ccm~puting permanent distortions, are ~esented. Implications of these results fer design are also considered. Auth.
Cavitation can be used in the disaggregation of mineral bearirg rock into its constituent grains. Experiments were carried out on rock samples in a modified Lichtarc~icz Cell to demorr strate this. Results indicated that comminution of the rock was very slow ard several methods were tried to increase the cavitation damage. The use of 2 converging cavitating Jets and pulsation of the test chamber pressure were found to be 2 effective methods.
836280 DESIGN AND PERFORMANCE OF HEAVILY LOADED PILES IN A HIGH-RISK EARTHQUAKE ZONE Watson, G H; Williams~ R S; Chun Chiu Yam Can Geotech J, V20, N2, May 1983, P262-275
836285 COMBINED
METHOD OF ROCK BREAKAGE Kuzmich, I A; Goldin, J A; Ruthberg, M I In: Sixth International Symposium on Jet Cutting Technology, University of Surreyj 6-8 April 1982, F301-321. Publ Cranfield: ~HRA, 1982
A major petrochemical facility is being constructed on the West Coast of Trinidad which is in an area of high seismic activity. An extensive programme was carried out to select the best design fer the pile foundations. This included theoretical predictions of axial and lateral load capacity and field loading tests. Predicted and measured pile capacities were compared.
Examines the hydromechanical breakage of rock and coal, i e a method using the simultaneous action of a water Jet and a mechanical tool. Experimental results obtained both in laberatcries and in situ are presented.
836281 ANALYSIS OF LANDSLIDES DURING THE 1978 IZUOHSHIMA-EINKAI EARTHOUAEE I ahihara, K; Nagao, A Soils Found, V23, NI, March 1983, P!9-37 Undisturbed samples of volcanic clay were obtained in blocks from the surface of the deposit considered responsible fer the slide. A series of dymamic triaxial tests were perfc~med by applying irregular axial loads to determine the soil strength urder seismic loading conditions. The results were expressed in terms of the Mohr-Coulc~b failure criterion. A pseudo-static analysis was then carried out to check the stability of the soil masses that had slld in the earthquake.
Drilfing 836286
DRI-LLIq~ OF ROCKS WITH ROTATING HIGH PRESSURE WATER JETS: INFLUENUE OF ROCK PROPm~I±ES Vi~ay, M M; Brierley, W H; Grattan-Bellew, P E In: Sixth International Symposium on Jet Cutting Technology, University of Surrey, 6-8 April 1982, I=179-198. Publ Cranfield: ~HRA, 1982 Tests were carried out on unconfined blocks of granite, limestone a~d marble using a series of dual orifice nozzles consisting of a central crifice and a secor~ orifice located at a radius of 5.8ram. The area of the outer orifice w~s varied systematically to allow 50 to 70 per cent of the total available flcw. The tests were conducted at pressures up to 6~MPa and 3 different rotatiomal speeds. Results indicate that: (I) optimum nozzle configuration depends on the mlcro-l~Operties of the rock, (2) the specific energy decreases considerably with increased pressure, and (3) quite low rotation speeds are close to the optimum situation.
Comminution of Rocks 836282 SIXTH
INTERNATIONAL SYMPOSYL~ ON JET CUTI~NG TECHNOI/DT, UNYVERSITY OF SURREY, 6"8 A~RIL
1982 Cranfield: BHRA, 1982, 524P See separate entries for selected individual papers.
836283
BEHA~OUROFTRECRUSH~DZONE ~CHNIC~NOTE Lind~iet, P A; ~ i H a i - H ~ Rock M e c h R o c k Engng, ~ 6 ,
Blasting
INROCKI~ENTATION.
8~2~ ~,
Aug 1983,
~99-2~
I ~ I C T I O N OF GROUND VIBRATIONS FROM BLASTING ON OPENCAST SITES. TECHNTCAL NOTE Birch, W J; Chaffer, R Trans Inst Min Mstall (Sect A Min Ind), %"92,
April 1983, PAIO3-AI07 Micro hardness tests on compressed, crushed rock indicate that the plastic behaviour of powder of ductile rocks resembles that of intact
@~ivariate a~alysis performed with the aid of a microcomputer has been used to predict the Peak Particle Velocity (PPV) from pattern blasts.