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Offshore pile grout monitoring method
I05A
faces were matched to form discontinuities with
wavelengths of 3 8 ~ with surface f o u l n e s s s~er t o no 100 ( s i e v e s i z e o f g r a i n s ) s a n l p a p e r . C u t t i ~ of t h e f i n a l s u r f a c e i n v o l v e s an opti-~m distance between successive l~sses of the ~et, seco~iary low pressure washiz~ ani an i~cl~ned nozzle. Auth.
815228 TESTS ON THE CUITING A-~'ORMAI~E OF A CONTINUOUS MII(~R R c ~ b ~ o t ~ , F F; Kim~, P; Pedronc,.ll~, E J J S Aft Imet Min Metall, VSI, NI, Jan 1981,
19-25 Discusses the basic mechanics of coal cuttir~ a n i d e s c r i b e s the modified test machine ani the various forms of test i ~ t i o n . Results on coal show that c~ttir~ efficiency ~ o v e s m~rked~ as the depth of cut ~er revolution of the drum increases, and that the best spaci~ of picks on the drum is twice the depth of cut. Pick shape is of seco=lary importance in terms of cutting efficiency.
815232 STRATA SEPARATIONS AND LOADS ON GROUfED BOLTS IN COAL MINE ROOFS Patrick, W C; Haas, C J Proc 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P757-768 Instrumented roof bolts were installed in three coal m4~-s, to examine the reaction of resingrouted bolts to geol~ic ani m l n i ~ stresses. Measurements of bolt strain ani s t r a t a displacements were made for three to six months. The bolt loads at the b e a r i ~ plates were in the order of Ome ton immediately after installation. With time, nonunifcrm l o a d i ~ developed along the bolts as strata separations occurred. Separations ani fractures which occurred in the r o o f bef='e t h e b o l t s w e r e i n s t a l l e d a n i t h e localized load t~=fer mechanism i n f u l l y grouted bolts - ~ e it difficult to correlate bolt loads to strata separations. Compressive loads were recorded in some bolts which may cause increased, unfavourable loeding of the lower roof strata.
815233 PLASTIC-ELASTIC ~r~TCAL ROCK BOLT
Rock and Soil Improvement Techniques 815229 POLYMERGRIDSAND NE~S AS SOIL REINFCRC~ENT Sweetlanl, D Civ E~gr~, Lotion, March 1981, supplement,
P30-3l Discusses the application of grids an~ nets produced by the Tensar process, which gives very high tensile strengths, with brief reference to case studies of sub-~ase reinforcement, emba~ment construction, retai~Ing walls ax~ slope sta~ilisation.
Describes the results of lab ani field tests on a rock bolt of helical cha~e that ~rovides both plastic ani elastic behaviour. Load ~ e s of straight ani helical bolts were measured using v!bratir~-wire iced gauges. The chs~ge in bolt load for helical bolts was one-third that for the straight bolts. There were no malfunctions of the gauges, ani the bolts maintained a more uniform load than the straight bolts used as controls.
Grouting 815234 OFFSHORE PILE GROUT MONITORING METHOD
Bolts and anchors
BrooMs, F A; Ruez, W J J Pet T ~ , V32, NI2, Dec 1980, P2234-2240
815230 NEW ROOF BOLT PASSES US TESTS Roberts, M Coal Age, V85, NT, July 1980, P122-127 Describes tensioned point An,~cr resin roof bolts ~cred by a quick-setti~ resin. Pull tests co~iucted on these bolts ani others with mechanical anchcrs show resin anchorage was twice that of mechanical. Subsequent tests showed a slight initial tension drop of point anchor r e s i n b o l t s , b u t no r o o f sag was d e t e c t e d , w h i l e r e a c L i ~ s for t h e mechanical arthur bolts showed bed separation.
815231 I~A~IOR ROCK R E ~ z '
Babcock, C 0 Proc 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P769-779
~
- STATE
OF THE ART Scott, J J Proc 21at US Symposium on Rock Mechanics, Rolls, Missouri, 28-30 May i~0, PT~A-756 Examines various rock relnfcrcement fixtures. A distinction is made between an active fixture (one that loads the geologic mass in which it is p l a c e d l m n e d i a t e l y upon i n s t a l l a t i o n ) ani a passive fixture (ome that is placed in the geologic mass ~ does not play a role in grou~i support until the mass moves anl loads the fixture). ~ l y e e s usage of each fixture anl tre~is of usage. Distlngulshes point-contact a~i full contact devices and discusses usage. Describes the mode of action of the different types a~i discusses selection.
Describes an electrical co~iuctlvlty method of monitoring offshore pile grout. The method detects remotely the initial appearance of the grout, its continued presence, the subsequent extent of set ard its q1,~1~ty. Auth.
Groundwater control 815235 STuI~ OF ~m~ m~ICACY OF ~
m~IPAL ov VZ~nCAL ImAI~S (IN Z=~CH)
:~'~s
Magnan, J P; Deroy, J M; Queyrol, D Liaison Lab Pore s Chaussees, NIIO, NovDec 1980, I~-24
Surveys published Information on the use of sand dra/ns on about 30 sites anl discusses methods of installlng sani drains, equivalent diameter of prefabricated flat drs/ns, determinution of the parameters of the structural design of drains. 83 refs.
Soil compaction 815236 CONE P E N E T R ~ I ~
USE Evans, B Civ Eng~g, Lonion, May 1981, F32-36
Discusses the utilisation of a Cone ~enetromete~ far the asses~nent of the cc~pactlon characteristics of remoulded clayey soils.
faces were matched to form discontinuities with
wavelengths of 3 8 ~ with surface f o u l n e s s s~er t o no 100 ( s i e v e s i z e o f g r a i n s ) s a n l p a p e r . C u t t i ~ of t h e f i n a l s u r f a c e i n v o l v e s an opti-~m distance between successive l~sses of the ~et, seco~iary low pressure washiz~ ani an i~cl~ned nozzle. Auth.
815228 TESTS ON THE CUITING A-~'ORMAI~E OF A CONTINUOUS MII(~R R c ~ b ~ o t ~ , F F; Kim~, P; Pedronc,.ll~, E J J S Aft Imet Min Metall, VSI, NI, Jan 1981,
19-25 Discusses the basic mechanics of coal cuttir~ a n i d e s c r i b e s the modified test machine ani the various forms of test i ~ t i o n . Results on coal show that c~ttir~ efficiency ~ o v e s m~rked~ as the depth of cut ~er revolution of the drum increases, and that the best spaci~ of picks on the drum is twice the depth of cut. Pick shape is of seco=lary importance in terms of cutting efficiency.
815232 STRATA SEPARATIONS AND LOADS ON GROUfED BOLTS IN COAL MINE ROOFS Patrick, W C; Haas, C J Proc 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P757-768 Instrumented roof bolts were installed in three coal m4~-s, to examine the reaction of resingrouted bolts to geol~ic ani m l n i ~ stresses. Measurements of bolt strain ani s t r a t a displacements were made for three to six months. The bolt loads at the b e a r i ~ plates were in the order of Ome ton immediately after installation. With time, nonunifcrm l o a d i ~ developed along the bolts as strata separations occurred. Separations ani fractures which occurred in the r o o f bef='e t h e b o l t s w e r e i n s t a l l e d a n i t h e localized load t~=fer mechanism i n f u l l y grouted bolts - ~ e it difficult to correlate bolt loads to strata separations. Compressive loads were recorded in some bolts which may cause increased, unfavourable loeding of the lower roof strata.
815233 PLASTIC-ELASTIC ~r~TCAL ROCK BOLT
Rock and Soil Improvement Techniques 815229 POLYMERGRIDSAND NE~S AS SOIL REINFCRC~ENT Sweetlanl, D Civ E~gr~, Lotion, March 1981, supplement,
P30-3l Discusses the application of grids an~ nets produced by the Tensar process, which gives very high tensile strengths, with brief reference to case studies of sub-~ase reinforcement, emba~ment construction, retai~Ing walls ax~ slope sta~ilisation.
Describes the results of lab ani field tests on a rock bolt of helical cha~e that ~rovides both plastic ani elastic behaviour. Load ~ e s of straight ani helical bolts were measured using v!bratir~-wire iced gauges. The chs~ge in bolt load for helical bolts was one-third that for the straight bolts. There were no malfunctions of the gauges, ani the bolts maintained a more uniform load than the straight bolts used as controls.
Grouting 815234 OFFSHORE PILE GROUT MONITORING METHOD
Bolts and anchors
BrooMs, F A; Ruez, W J J Pet T ~ , V32, NI2, Dec 1980, P2234-2240
815230 NEW ROOF BOLT PASSES US TESTS Roberts, M Coal Age, V85, NT, July 1980, P122-127 Describes tensioned point An,~cr resin roof bolts ~cred by a quick-setti~ resin. Pull tests co~iucted on these bolts ani others with mechanical anchcrs show resin anchorage was twice that of mechanical. Subsequent tests showed a slight initial tension drop of point anchor r e s i n b o l t s , b u t no r o o f sag was d e t e c t e d , w h i l e r e a c L i ~ s for t h e mechanical arthur bolts showed bed separation.
815231 I~A~IOR ROCK R E ~ z '
Babcock, C 0 Proc 21st US Symposium on Rock Mechanics, Rolla, Missouri, 28-30 May 1980, P769-779
~
- STATE
OF THE ART Scott, J J Proc 21at US Symposium on Rock Mechanics, Rolls, Missouri, 28-30 May i~0, PT~A-756 Examines various rock relnfcrcement fixtures. A distinction is made between an active fixture (one that loads the geologic mass in which it is p l a c e d l m n e d i a t e l y upon i n s t a l l a t i o n ) ani a passive fixture (ome that is placed in the geologic mass ~ does not play a role in grou~i support until the mass moves anl loads the fixture). ~ l y e e s usage of each fixture anl tre~is of usage. Distlngulshes point-contact a~i full contact devices and discusses usage. Describes the mode of action of the different types a~i discusses selection.
Describes an electrical co~iuctlvlty method of monitoring offshore pile grout. The method detects remotely the initial appearance of the grout, its continued presence, the subsequent extent of set ard its q1,~1~ty. Auth.
Groundwater control 815235 STuI~ OF ~m~ m~ICACY OF ~
m~IPAL ov VZ~nCAL ImAI~S (IN Z=~CH)
:~'~s
Magnan, J P; Deroy, J M; Queyrol, D Liaison Lab Pore s Chaussees, NIIO, NovDec 1980, I~-24
Surveys published Information on the use of sand dra/ns on about 30 sites anl discusses methods of installlng sani drains, equivalent diameter of prefabricated flat drs/ns, determinution of the parameters of the structural design of drains. 83 refs.
Soil compaction 815236 CONE P E N E T R ~ I ~
USE Evans, B Civ Eng~g, Lonion, May 1981, F32-36
Discusses the utilisation of a Cone ~enetromete~ far the asses~nent of the cc~pactlon characteristics of remoulded clayey soils.