NO772467L - DEEP DEVICE FOR INSERTING INTO A BOREHOLE - Google Patents
DEEP DEVICE FOR INSERTING INTO A BOREHOLEInfo
- Publication number
- NO772467L NO772467L NO772467A NO772467A NO772467L NO 772467 L NO772467 L NO 772467L NO 772467 A NO772467 A NO 772467A NO 772467 A NO772467 A NO 772467A NO 772467 L NO772467 L NO 772467L
- Authority
- NO
- Norway
- Prior art keywords
- plug
- wedge element
- borehole
- specified
- stated
- Prior art date
Links
- 239000004570 mortar (masonry) Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 18
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000002775 capsule Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
- F16B13/141—Fixing plugs in holes by the use of settable material
- F16B13/143—Fixing plugs in holes by the use of settable material using frangible cartridges or capsules containing the setting components
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Farming Of Fish And Shellfish (AREA)
- Crushing And Pulverization Processes (AREA)
- Dowels (AREA)
- Piles And Underground Anchors (AREA)
Description
Plugganordning for innstøpingPlug device for embedding
i et borehull.in a borehole.
Oppfinnelsen angår en forbedret plugganordning for innsetting i et borehull i hardt materiale for å danne forsterkning- eller forankringsorganer. Oppfinnelsen innbefatter også The invention relates to an improved plug device for insertion into a borehole in hard material to form reinforcement or anchoring means. The invention also includes
en fremgangsmåte for å forsterke et hardt medium, en fremgangsmåte for å fremskaffe en forankring i et hardt medium, og et hardt medium hvor plugganordningen er innstøpt i et borehull i mediet. a method for reinforcing a hard medium, a method for providing an anchorage in a hard medium, and a hard medium where the plug device is embedded in a borehole in the medium.
Den teknikk som går ut på innstøping av plugger såsom forsterkningsplugger eller ankerbolter i et hardt medium som ,f.eks. hardt fjell har lenge vært anvendt og er beskrevet i bri-tisk patentskrift nr. 953 056 og 1 408 366. I hovedsaken går fremgangsmåten ut på å bore et hull i mediet, som er overdimensjonert i forhold til pluggen og 'å innføre pluggen med et omgivende lag herdbar mørtelblanding i borehullet, slik at pluggen ved herding av mørtelblandingen bindes til borehullveggen. Pluggen kan ende i borehullet eller den kan strekke seg over kanten på borehullet og være utstyrt med festeorganer for befestigelse av andre elementer, eller holde en trykkplate mot mediet ved borehullets åpningskant. Pluggen er fortrinnsvis utformet med et .utvidet konisk parti ved innføringsenden, hvilket.parti virker som en kile på mørtelmaterialet når pluggen trekkes hvorvedøkes mør-telens fastholdingsevne. The technique that involves embedding plugs such as reinforcement plugs or anchor bolts in a hard medium such as, e.g. hard rock has long been used and is described in British patent documents no. 953 056 and 1 408 366. In the main, the method involves drilling a hole in the medium, which is oversized in relation to the plug and 'introducing the plug with a surrounding layer of hardenable mortar mixture in the borehole, so that the plug is bonded to the borehole wall when the mortar mixture hardens. The plug can end in the borehole or it can extend over the edge of the borehole and be equipped with fastening means for fastening other elements, or hold a pressure plate against the medium at the opening edge of the borehole. The plug is preferably designed with an extended conical part at the insertion end, which part acts as a wedge on the mortar material when the plug is pulled, thereby increasing the mortar's holding power.
Det er et formål med denne oppfinnelse å tilveiebringe en forbedret, endeutvidet plugginnretning for innstøping i et borehull, som hurtig og enkelt kan fremstilles av vanlig pluggemne. It is an object of this invention to provide an improved, end-extended plug device for embedding in a borehole, which can be quickly and easily produced from ordinary plug blanks.
I henhold til oppfinnelsen er det fremskaffet en plugginnretning for innstøping i et borehull, omfattende en plugg med et kileelement anordnet i en åpning som er utformet i pluggens innføringsende, hvorved et endeparti på pluggen ekspanderes radi-elt utover. According to the invention, a plug device for embedding in a borehole has been provided, comprising a plug with a wedge element arranged in an opening which is formed in the insertion end of the plug, whereby an end part of the plug is expanded radially outwards.
Når pluggen innstøpes i borehullet med en mørtelblan- ding og strekkes, enten ved hjelp av en endebelastning som virker på pluggenden ved borehullets kantåpning eller ved deformasjon av det tilstøtende fjell, komprimeres mørtelen nær pluggens utvidede endeparti og mørtelens fastholdingskraft vil derved stige. When the plug is embedded in the borehole with a mortar mixture and stretched, either by means of an end load that acts on the plug end at the edge opening of the borehole or by deformation of the adjacent rock, the mortar is compressed near the extended end part of the plug and the mortar's holding power will thereby increase.
Pluggen er hensiktsmessig delt i ett eller flere spalteplan som strekker seg fra pluggens innføringsende og kileelementet innføres i spalten slik at endesegmentene vides ut. I den foretrukne utføringsform av pluggen er endepartiet spaltet langs et midtplan og et kileelement er plassert i spalten for å holde endesegmentene fra hverandre. Kileelementet er fortrinnsvis anordnet i spalten slik at det danner inngrep med endesegmentene i en stilling i avstand fra pluggenden, hvorved et overflateparti på i det minste ett av segmentene mellom nevnte inngrepsstilling og pluggenden fritt kan bøyes innover under utvendig trykk på pluggen. Ved å anordne kileelementet på denne måte opp-nås en vesentlig praktisk fordel når pluggen innstøpes i fjell som gjennomgår plastisk deformasjon etter at mørtelen har herdnet. The plug is suitably divided into one or more slot planes that extend from the plug's insertion end and the wedge element is inserted into the slot so that the end segments are widened. In the preferred embodiment of the plug, the end portion is slotted along a central plane and a wedge element is placed in the slot to hold the end segments apart. The wedge element is preferably arranged in the slot so that it forms engagement with the end segments in a position at a distance from the plug end, whereby a surface portion of at least one of the segments between said engagement position and the plug end can be freely bent inwards under external pressure on the plug. By arranging the wedge element in this way, a significant practical advantage is achieved when the plug is embedded in rock that undergoes plastic deformation after the mortar has hardened.
-Med en konvensjonell plugg som utvides ved innføringsenden vil strekkbelastningen i pluggen gradvis øke inntil brudd, mens strekkbelastningen ved plugger med det ovenfor beskrevne bøyelige ende-segment vil bli delvis avlastet ved et karakteristisk slitt trykk og pluggen vil fortsatt støtte mørtelmaterialet. Flere påfølgende sykluser av belastningsøking og delvis avlasting kan finne sted -With a conventional plug that expands at the insertion end, the tensile load in the plug will gradually increase until failure, while the tensile load in plugs with the flexible end segment described above will be partially relieved by a characteristic worn pressure and the plug will continue to support the mortar material. Several successive cycles of load increase and partial unloading may take place
slik at pluggens forsterkningsvirkning vedvarer under vesentlig bevegelse i de omgivende stenlag. so that the plug's reinforcing effect persists during significant movement in the surrounding rock layers.
En hensiktsmessig form for kileelement er en stort sett plan, stiv plate hvis to hovedflater er parallelle eller konvergerer i elementets innføringsretning i pluggenden. Kileelementets fremre kant er . fortrinnsvis formet som en meiselegg hvilket letter dens innføring i pluggenden. Dersom pluggene er fremstilt av tre eller plastmateriale kan et meiselformet kileelement av metall, f.eks. et stålelement, fordelaktig drives inn i en hel pluggende for oppspalting og utvidelse av pluggenden, hvorved kileelementet plasseres i én hurtig operasjon. A suitable form of wedge element is a generally flat, rigid plate whose two main surfaces are parallel or converge in the direction of insertion of the element into the plug end. The leading edge of the wedge element is . preferably shaped like a chisel egg, which facilitates its introduction into the plug end. If the plugs are made of wood or plastic material, a chisel-shaped metal wedge element, e.g. a steel element, advantageously driven into an entire plug end for splitting and expanding the plug end, whereby the wedge element is placed in one quick operation.
Kileelementet strekker seg fortrinnsvis utenfor pluggens sideflater slik at det utstikkende parti bidrar til omrøring av mørtelblandingen når plugginnretningen dreies i borehullet. Det foretrekkes videre at nevnte utstikkende sideparti på kileelementet er forsynt med én eller flere skjæreegger hvorved kapsler med innkapslede mørtelkomponenter kan brytes opp. Kileelementet kan være symmetrisk eller eksentrisk anordnet i forhold til pluggens lengdeakse, og når pluggen anvendes i et borehull i bløtt materiale kan et eksentrisk kileelement med fordel virke til å skjære.et spor i borehullveggen og.derved tilveiebringe en lås for mørtelen. Pluggen kan være fremstilt av hvilket som helst konstruksjonsmateriale som har tilstrekkelig styrke til å "forsterke mørtelmaterialet og er tilstrekkelig bøyelig til at dens endeparti kan vides ut og holdes i utvideet stilling ved hjelp av en kile. Således vil metaller såsom jern, kopper og aluminium og legeringer såsom stål,messig og aluminiumlegeringer være egnet. Tre og harde plastmaterialer er også brukbare. En særlig anvendbar plugg, kan være fremstilt av glassfiberarmert plastmateriale og glassfiberen er fortrinnsvis i form av fila-menter som strekker seg parallelt med pluggaksen hvorved oppspalting av pluggenden langs et aksialplan lettes. The wedge element preferably extends beyond the side surfaces of the plug so that the projecting part contributes to stirring the mortar mixture when the plug device is rotated in the borehole. It is further preferred that said projecting side part of the wedge element is provided with one or more cutting edges by which capsules with encapsulated mortar components can be broken open. The wedge element can be symmetrically or eccentrically arranged in relation to the plug's longitudinal axis, and when the plug is used in a borehole in soft material, an eccentric wedge element can advantageously act to cut a groove in the borehole wall and thereby provide a lock for the mortar. The plug may be made of any material of construction which has sufficient strength to "reinforce the mortar material and is sufficiently flexible that its end portion may be expanded and held in the expanded position by means of a wedge. Thus metals such as iron, copper and aluminum and alloys such as steel, copper and aluminum alloys are suitable. Wood and hard plastic materials are also usable. A particularly useful plug can be made of glass fiber reinforced plastic material and the glass fiber is preferably in the form of filaments that extend parallel to the plug axis whereby splitting the plug end along an axial plane is facilitated.
Der hvor den ovenfor beskrevne avlastningsegenskap er ønskelig har pluggen fortrinnsvis en stort sett glatt sylindrisk overflate, men forøvrig kan den sylindriske overflate være ujevn og f.eks. forsynt med fremspring, spor eller tråder somøker dens overflateareal og forbedrer dens bindeevne til mørte-len. Where the relief property described above is desirable, the plug preferably has a mostly smooth cylindrical surface, but otherwise the cylindrical surface can be uneven and e.g. provided with protrusions, grooves or threads which increase its surface area and improve its bonding ability to the mortar.
Oppfinnelsen omfatter også en fremgangsmåte for å forsterke et hardt medium såsom fjellgrunn, eller for å tilveiebringe en forankring i nevnte medium, hvor en plugginnretning som ovenfor beskrevet og hvis innføringsende er utvidet ved hjelp av et sideelement anordnet i endepartiet, innføres i et overdimensjonert borehull i mediet med innføringsenden nær borehullets bunnende og et herdbart mørtelmateriale anordnet i rommet mellom pluggen og. borehullveggen, hvorved pluggen, når mørtelmaterialet herdner, bindes til borehullveggen. Mørtelmaterialet kan f.eks. omfatte portland-cement, kalsiumsulfat, semihydrat gips eller en herdeplast. To-komponent innkapslet hurtigherdende plastmaterialer er særlig hensiktsmessig ettersom komponentene kan spredes og blandes ved hjelp av et kileelement som rager utenfor pluggens sideflater. The invention also includes a method for reinforcing a hard medium such as bedrock, or for providing an anchorage in said medium, where a plug device as described above and whose insertion end is extended by means of a side element arranged in the end part, is inserted into an oversized borehole in the medium with the insertion end near the bottom of the drill hole and a hardenable mortar material arranged in the space between the plug and. the borehole wall, whereby the plug, when the mortar material hardens, is bonded to the borehole wall. The mortar material can e.g. include portland cement, calcium sulphate, semi-hydrated gypsum or a thermosetting plastic. Two-component encapsulated rapid-setting plastic materials are particularly suitable as the components can be dispersed and mixed by means of a wedge element which projects beyond the side surfaces of the plug.
For ytterligere å belyse oppfinnelsen skal en fore-trukket plugginnretning som eksempel beskrives i det følgende, under henvisning til tegningen, hvor: Fig. 1 skjematisk viser et ytre lengdesnitt gjennom en plugginnretning klar for innføring i et borehull i et fjellmassiv, To further illustrate the invention, a preferred plug device will be described as an example in the following, with reference to the drawing, where: Fig. 1 schematically shows an external longitudinal section through a plug device ready for insertion into a borehole in a rock massif,
Fig. 2 viser skjematisk et midtre lengdesnitt av plugginnretningen på figur 1 i et plan vinkelrett på snittet i figur 1 etter at innretningen er innført i borehullet. Fig. 2 schematically shows a middle longitudinal section of the plug device in Figure 1 in a plane perpendicular to the section in Figure 1 after the device has been introduced into the borehole.
Plugginnretningen består av en vesentlig sylindrisk plugg 10 som er spaltet langs et midtplan slik at det ved pluggens innføringsende danner et todelt parti. 11 med endesegmenter 12 og 13. Segementene 12 og 13 er adskilt ved hjelp av et kileelement 14 som bøyer segmentene utover slik at endepartiet 11 utvides fra den rette sylindriske overflate på resten av pluggen 10. The plug device consists of a substantially cylindrical plug 10 which is split along a central plane so that it forms a two-part part at the insertion end of the plug. 11 with end segments 12 and 13. The segments 12 and 13 are separated by means of a wedge element 14 which bends the segments outwards so that the end portion 11 extends from the straight cylindrical surface of the rest of the plug 10.
Kileelementet 14 er en stiv, flat, rektangulær flate med stort sett parallelle tverrgående hovedflater 15 og 16 som er avfaset slik at de konvergerer med en meiselkant 17. Ende-flatene 18 og 19 konvergerer med hovedflåtene 15 og 16 ved skarpe, rektangulære skjæreegger. Kileelementet 14 danner inngrep med segmentene 12 og 13 ved henholdsvis stillinger 20 og 21 og segmentpartiene mellom disse stillinger og de frie segment-ender kan fritt bøyes innover. The wedge element 14 is a rigid, flat, rectangular surface with generally parallel transverse main surfaces 15 and 16 which are chamfered so that they converge with a chisel edge 17. The end surfaces 18 and 19 converge with the main surfaces 15 and 16 at sharp, rectangular cutting edges. The wedge element 14 forms an engagement with the segments 12 and 13 at positions 20 and 21, respectively, and the segment parts between these positions and the free segment ends can be freely bent inwards.
For innstøping av plugginnretningen innføres kapsler med et to-komponent plastmateriale i et borehull 22 som har stør-re dimensjoner enn plugginnretningen i fjellmassivet 23. Hver kapsel består av en ytre beholder 24 som inneholder herdeharpiks 25 og en" indre beholder 26 som ligger inne i beholderen 24 og inneholder en herdekatalysator 27 for harpiksen 25.. Begge behol-dere er fremstilt av et tynt, lett oppbrytbart termoplastmateri-ale.. For embedding the plug device, capsules with a two-component plastic material are introduced into a drill hole 22 which has larger dimensions than the plug device in the rock massif 23. Each capsule consists of an outer container 24 that contains curing resin 25 and an inner container 26 that lies inside the container 24 and contains a curing catalyst 27 for the resin 25.. Both containers are made of a thin, easily breakable thermoplastic material..
Plugginnretningen blir deretter samtidig dreiet rundt og innført i borehullet 22 hvorved kapselene påvirkes av pluggsegmentene 12 og 13 og de rektangulære skjæreegger på kileelementet 14. Termoplastbeholderne brytes og innholdet blandes og strømmer inn i rommet mellom pluggen 10 og veggen i borehullet 22 hvor harpiksen deretter herdner.. The plug device is then simultaneously turned around and introduced into the borehole 22 whereby the capsules are affected by the plug segments 12 and 13 and the rectangular cutting edges on the wedge element 14. The thermoplastic containers are broken and the contents are mixed and flow into the space between the plug 10 and the wall of the borehole 22 where the resin then hardens. .
Når en strekkbelastning virker på pluggen vil harpiksen mellom det utvidede endeparti 11 og borehullveggen bli komp-rimert og dens fastholdingsstyrke vil stige. Når belastningen økes forbi en kritisk verdi blir strekkspenningen plutselig delvis avlastet, sannsynligvis fordi segmentenes 12 og 13 endepar-tier bøyes innover. Strekkbelastningen kan så igjen økes til den When a tensile load acts on the plug, the resin between the extended end portion 11 and the borehole wall will be compressed and its holding strength will increase. When the load is increased beyond a critical value, the tensile stress is suddenly partially relieved, probably because the end parts of the segments 12 and 13 are bent inwards. The tensile load can then again be increased to it
kritiske verdi.critical value.
Ved et spesielt eksempel på en plugginnretning var pluggen en stang med diameter 17 mm og lengde 80 cm fremstilt av aksielt orienterte fiberglassfilamenter i en herdeharpiks. Kileelementet var en vesentlig rektangulær fiberglassplate 32mmxl5mmx4mm anordnet på tvers i pluggens oppspaltede innføringsende med kileelementets meiselegg 17 i en dybde på In a particular example of a plug device, the plug was a rod with a diameter of 17 mm and a length of 80 cm made of axially oriented fiberglass filaments in a curing resin. The wedge element was a substantially rectangular fiberglass plate 32mmx5mmx4mm arranged transversely in the split insertion end of the plug with the chisel edge 17 of the wedge element at a depth of
3,3 cm fra pluggenden, idet pluggendesegmentene var utbøyet til en totalbredde på 32 mm. Pluggen ble innstøpt i et borehull av diameter 34 mm og dybde 30 cm i et fjellmassiv med en polyester-harpiksmørtel (som innledningsvis var innkapslet) og utsatt for en aksial strekkbelastning. Belastningen på pluggen ble gradvis øket opptil 7 tonn hvoretter de utbøyde pluggsegmenter ga etter og avlastet belastningen til ca. 2 tonn. Belastningen på pluggen ble så igjen øket til slipp-punktet ved ca. 7 tonn og så 3.3 cm from the plug end, the plug end segments being bent to a total width of 32 mm. The plug was embedded in a borehole of diameter 34 mm and depth 30 cm in a rock massif with a polyester resin mortar (which was initially encapsulated) and subjected to an axial tensile load. The load on the plug was gradually increased up to 7 tonnes, after which the bent plug segments gave way and relieved the load to approx. 2 tons. The load on the plug was then again increased to the release point at approx. 7 tons and so
igjen avlastet. Belastnings- og avlastningssyklusen ble utført gjentatte ganger etter stort sett samme mønster hvorunder pluggen ble trukket ca. 10 cm utover i borehullet. again relieved. The loading and unloading cycle was carried out repeatedly following largely the same pattern during which the plug was pulled approx. 10 cm outwards in the borehole.
Claims (17)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB33803/76A GB1524469A (en) | 1976-08-13 | 1976-08-13 | Dowel device for grouting in a drillhole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO772467L true NO772467L (en) | 1978-02-14 |
Family
ID=10357646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO772467A NO772467L (en) | 1976-08-13 | 1977-07-12 | DEEP DEVICE FOR INSERTING INTO A BOREHOLE |
Country Status (8)
| Country | Link |
|---|---|
| AU (1) | AU505413B2 (en) |
| BE (1) | BE857592A (en) |
| CA (1) | CA1066540A (en) |
| DE (1) | DE2734633A1 (en) |
| ES (1) | ES461580A1 (en) |
| FR (1) | FR2361564A1 (en) |
| GB (1) | GB1524469A (en) |
| NO (1) | NO772467L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3118492A1 (en) * | 1981-05-09 | 1982-12-02 | Bayer Ag, 5090 Leverkusen | FORCE INITIAL ELEMENT FOR FIBER COMPOSITES |
| DE3620972A1 (en) * | 1986-06-23 | 1988-01-14 | Hilti Ag | ANCHORABLE ROD ANCHORABLE BY MEANS OF A CURATIVE RANGE |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2667037A (en) * | 1949-08-24 | 1954-01-26 | Edward M Thomas | Suspension roof support |
| US2697914A (en) * | 1949-10-11 | 1954-12-28 | Joy Mfg Co | Releasable wedge type roof bolt |
| US2725843A (en) * | 1951-06-01 | 1955-12-06 | Francis A E Koski | Sag indicator |
| US2651962A (en) * | 1951-06-25 | 1953-09-15 | John V Hammond | Wedge type bolt or pin |
| FR1100773A (en) * | 1953-05-26 | 1955-09-23 | Gutehoffnungshuette Sterkrade | Biting tooth device for anchors in mine support |
| DE1008234B (en) * | 1954-06-18 | 1957-05-16 | Gutehoffnungshuette Sterkrade | Rock anchor for pit construction in mining |
| FR1128704A (en) * | 1955-07-07 | 1957-01-09 | Forges Et Boulonneries Hermant | Wedge anchor rod and method of making this rod |
| FR1186263A (en) * | 1957-07-31 | 1959-08-19 | Saarbergwerke | Anchor bolt safety wedge |
| CH385140A (en) * | 1959-04-20 | 1964-12-15 | Bergwerksverband Gmbh | Method of fastening anchors in the boreholes receiving them |
| FR1356888A (en) * | 1963-05-24 | 1964-03-27 | Process in particular for supporting the roofs of underground galleries as well as devices for implementing the present process or similar process | |
| FR85195E (en) * | 1964-02-10 | 1965-06-25 | Process in particular for supporting the roofs of underground galleries as well as devices for implementing the present process or similar process | |
| FR87644E (en) * | 1965-04-01 | 1966-04-15 | Forges Et Boulonneries Hermant | Anchoring device |
| GB1195686A (en) * | 1966-10-03 | 1970-06-17 | James Deans Cumming | Improvements in or relating to Friction Grip Fasteners |
| BE795928A (en) * | 1970-04-27 | 1973-06-18 | Celtite Sa | SEALING RODS IMPROVEMENTS |
| GB1408366A (en) * | 1973-06-22 | 1975-10-01 | Ici Ltd | Anchor bolt |
| FR2337812A1 (en) * | 1976-01-08 | 1977-08-05 | Celtite Sa | Mine support anchor bolt - has glass fibre reinforced rod and split collar expanded by wedge against bottom of hole (SW 1.8.77) |
-
1976
- 1976-08-13 GB GB33803/76A patent/GB1524469A/en not_active Expired
-
1977
- 1977-07-12 NO NO772467A patent/NO772467L/en unknown
- 1977-07-14 AU AU27012/77A patent/AU505413B2/en not_active Expired
- 1977-08-01 DE DE19772734633 patent/DE2734633A1/en active Pending
- 1977-08-05 CA CA284,217A patent/CA1066540A/en not_active Expired
- 1977-08-08 BE BE180001A patent/BE857592A/en unknown
- 1977-08-12 ES ES461580A patent/ES461580A1/en not_active Expired
- 1977-08-12 FR FR7724931A patent/FR2361564A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB1524469A (en) | 1978-09-13 |
| AU505413B2 (en) | 1979-11-22 |
| DE2734633A1 (en) | 1978-02-16 |
| ES461580A1 (en) | 1978-12-01 |
| AU2701277A (en) | 1979-01-18 |
| FR2361564A1 (en) | 1978-03-10 |
| BE857592A (en) | 1978-02-08 |
| CA1066540A (en) | 1979-11-20 |
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