US3436923A - Method and equipment for making tension anchors - Google Patents

Method and equipment for making tension anchors Download PDF

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Publication number
US3436923A
US3436923A US567800A US3436923DA US3436923A US 3436923 A US3436923 A US 3436923A US 567800 A US567800 A US 567800A US 3436923D A US3436923D A US 3436923DA US 3436923 A US3436923 A US 3436923A
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Prior art keywords
drill
tension
equipment
hole
draw member
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Expired - Lifetime
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US567800A
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English (en)
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Gunnar Lagerstrom
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Atlas Copco AB
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Atlas Copco AB
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts

Definitions

  • a method and apparatus for making a tension anchor in the ground which utilizes drilling equipment for simultaneously drilling the hole for the anchor and drawing down into the hole a bundle of tension wires for the anchor by disposing the draw member for the tension wires adjacent the drill bit, and by using a tubular drill rod through which grouting is injected into the drill hole and around the tension wires simultaneously as the rod is withdrawn from the hole.
  • the draw member is rotatable with respect to the drill bit and rod, and the drilling equipment including the drill bit is capable of drilling through rock as well as earth.
  • This invention relates to a method and equipment for making tension anchors particularly in the ground.
  • Such anchors are used for anchoring objects such as sheet piling walls, building foundations, high tension power masts, suspension bridges, hydro power plant dams, or the like.
  • the invention is particularly related to the pr0- vision of tension anchors for heavy loads.
  • Such anchoring is often carried out by means of a bundle of heavy wires or cables which are anchored in the ground, for instance in bed rock or in the overburden soil, in holes in which the wire or cable bundles are inserted and anchored by injection of grouting or similar material around the wires or the like.
  • Tension anchors may often have to take a load of several hundred tons and in such cases it has been found uneconomical to use tie rods since such rods for these heavy loads are very expensive. It is in many cases more economical to use wire or cable bundles or bundles of other flexible members, such as flexible steel rods or steel bands or the like, which form a bundle anchored in a hole in the soil or in bed rock in which grouting or other stabilizing material is injected. So far, bundles of wires or cables have been inserted through a casing into a hole which, however, is an expensive and cumbersome affair.
  • the present invention comprises making a tension anchor in the ground by drilling a hole into the ground by means of drilling equipment comprising a tubular drill string carrying a drill bit, drawing a bundle of flexible tension members down into the hole by a draw member carried down by and preferably simultaneously with the drilling equipment, and injecting grouting or similar material around at least a portion of said bundle.
  • a non-rotating draw member is used which is coupled to the drill bit in such a manner that the drill bit may rotate without rotating the draw member and carries the draw member and the tension members down into the hole simultaneously during drilling whereupon the flexible tension members such as wires, cables, steel bands or thin steel rods are fixed by injection of grouting.
  • the drill rod When the drill bit has been drilled down through the overburden and prefreably some distance into bed rock the drill rod can be withdrawn and simultaneously grouting or the like is injected through the hollow drill rod to fill out the empty spaces in the bundle of wires or the like and also to fill out cavities in the ground around the hole so 3,433,323 Patented Apr. 8, 1969 that a satisfactory anchorage is obtained.
  • the tension anchor is tested by means of hydraulic jacks in conventional manner.
  • FIG. 1 is a diagrammatic view illustrating in vertical section a portion of an excavation for a building foundation surrounded by a wall of sheet piling.
  • FIG. 2. is a similar view and illustrates a completed tension anchor and another tension anchor under construction.
  • FIG. 3 is a diagrammatic elevation and partial section illustrating a feeding arrangement for wires used to form a tension anchor.
  • FIG. 4 is a side view partly in vertical section and illustrates means for guiding the wires into the hole, and
  • FIG. 5 is an elevation of the equipment in FIG. 4.
  • FIG. 6 is a longitudinal section and partial side view of the drilling end of the anchoring equipment according to the invention.
  • FIG. 7 is a section on line VI I-VII and FIG. 8 a section on line VIII-VIII in FIG. 6.
  • FIG. 9 is a transverse section on line IX-IX in FIG. 3.
  • FIGS. 1 and 2 a cavity 1 is illustrated which provides space for drill wagons or other drill carriages and for other equipment necessary in connection with the construction of a building foundation.
  • the cavity 1 is surrounded by walls of sheet piling 2 which may or may not have been driven all the way down to bed rock 3.
  • Said sheet piling may form a continuous wall with openings for the tension anchors or the piles may be placed at a distance from each other to provide openings in Ibetween the sheet piles for the tension anchors.
  • the overburden which extends down from the original ground level 4 may comprise loose soil, sand, boulders, filling material or the like. 5 indicates boulders or blocks in the overburden soil 6.
  • the cavity 1 is preferably excavated with a suitable digging machine while the tension anchoring goes on so that an upper row of tension anchors is positioned before the cavity is dug out to its final low level 7.
  • a conventional feed bar for a conventional hammer drill 9 which may preferably be a heavy hammer drill with separate rotation motor.
  • the hammer drill 9 operates on a shank adapter 10 which is coupled to a hollow drill string comprising tubular drill rods 11 or a single hollow drill rod 11 if the depth of the desired hole is not too large coupled together and to the shank adapter 10 by means of sleeves 12.
  • a drill bit 13 which may be of substantially conventional design as regards the positioning of hard metal inserts 14 which, however, are only carried out for being able to drill a comparatively short hole in rock, for instance three or four meters.
  • the drill bit 13 is provided with flushing passages 15, 16 which communicate with a large passage 17 in the drill string dimensioned so that it can be used not only for the transportation of flushing fluid such as air, water or other flushing fluid to the drill bit but also for afterwards being used for transportation of grouting for injecting the hole and the surroundings of the tension anchor.
  • the drill string is surrounded by a number of flexible tension members 18 which in the illustrated embodiment consist of heavy steel wires or cables, for instance half inch steel calbles, which at the lower end are provided with wire clamps 19 forming sockets 20 which in conventional manner may be hydraulically secured by being pressed around the ends 21 of the cables or wires 18.
  • the clamps 19 are inserted and fitted in corresponding recesses 22 in a draw member 23 which forms an annular body or wire head of little less outer diameter than the diameter of the drill bit 13 so that it can follow the drill bit 13 easily down into the ground and into rock.
  • the draw member 23 forms a central passage 24 through which the drill string '11 may pass.
  • a bushing 25 having an annular external flange 26 fits into the bore 27 in the draw member 23 with ample clearance so as to permit said bushing 25 to rotate relatively to the draw member and also to permit passage of flushing fluid and/ or grouting from the passage 17 into the draw member.
  • the lower shoulder of the flange 26 rests on a reinforced nylon ring 28 or a ring of self-lubricating bronze or other material which cooperates with a tubular bushing 29 screwed into the lower end of the draw member 23, 23 as indicated at 30.
  • the bushing 25 has a square or otherwise non-circular axial passage 31, FIGS. 6 and 8, in which the correspondingly shaped lower end 32 fits so that the drill string may rotate the bushing 25 and thereby rotate the drill bit 13 which is screw threaded onto the bushing at 33.
  • the lower end 32 of the drill string fits in the axial passage 31 in the bushing 25 in such a manner that the drill string may easily be removed out of the bushing 25 by retracting the drill string.
  • the drill string end 32 has further flushing passages 34 which communicate with flushing passages 35 in the bushing 25 and with the clearance 36 lbetween the bushing 25 and the bushing 29 so that said clearance may be well flushed with flushing medium during operation of the equipment.
  • flushing the clearance 36 the bearing formed between the bushing 29 and the flange 26 may be kept free from dirt and debris.
  • the tension members 18 which may consist of wires or steel cables or flexible band steel or other similar flexible members pre-cut to suitable length may be wound onto drums 37 which are fitted for rotation on brackets 38 secured to the lower end of the feed bar 8.
  • 39 is a motor such as a compressed air motor which is in driving connection with the shafts 40 of the drums 37 so that the motor can rotate the drums.
  • the flexible members are guided over rollers 41 into a guide hopper 42 on the feed bar which hopper consists of a split ring with a number of axial grooves 43, FIG. 9, one for each tension member .18, so that said members are evenly distributed around the drill string 11.
  • the hopper 42 is divided in two parts hinged together to be able to be mounted on the bracket 38 and to receive the drill string and the tension member, as obvious from FIG. 9.
  • the tension members i18 may be fed into said hopper directly from the ground where they may just be put in order before drilling so that they may follow the draw member down into the hole as drilling proceeds.
  • 44 is a conventional drill steel guide of the type commonly used on drill carriages of various types.
  • the hopper 42 and the drill steel guide 44 may be carried by an axially adjustable or movable sliding member 45 which may be operated into various axial positions by means of a power cylinder in similar way as movable drill steel guides are operable on feed bars for drill carriages.
  • Such an arrangement makes it easier to place the hopper 42 at ample distance above a couple of channels 46 or other structure which form supports for the anchor heads on which the wire anchors are intended to rest.
  • the channels 46 also distribute the tension over a number of sheet piles 2 of the sheet pile wall which it is desired to anchor.
  • the lorry 47 is a lorry or other transportation means which carries the feed bar 8 on brackets 49 which may be arranged to permit dumping of the feed bars down on the lorry into substantially horizontal position.
  • the lorry also carries pump equipment 50 for supplying flushing water and/or grouting through a hose 51 and a flushing head 52 which is rotatably disposed on the adapter 10 and communicates with the passage 17 in the drill string in a manner which is well known in this art.
  • the number of wires or other tension elements 18 in tension anchors naturally varies according to the load for which the anchors are constructed and the dimension of the wires or other elements available in each case.
  • the method according to the invention is carried out in the following manner:
  • the drill carriage or lorry 4'7 with the feed bar 8 is moved to the position at the sheet piling 2 where it is desired to arrange the tension anchor.
  • a drill bit 13 with a suitable draw member 23 fitted thereon is provided on the square end 32 of a drill string 11 and the desired number of wires or cables are drawn from the drums 37 or from the ground where they lie ready for use and inserted in the recesses 22.
  • the upper half of the hopper is closed and the draw member 23 with the wires is advanced through the hopper 42 and the tension members are brought into position in the various grooves 43 and the wires are stretched.
  • the sliding member 45 is then advanced towards the channels 46 to a position substantially as illustrated in FIG.
  • the drill feed is advanced so that the drill bit and the draw member 23 are moved down towards the ground pulling the tension members 18 through the guide hopper 42.
  • the drill bit enters the ground flushing air or flushing water supply is provided through the passage 17 and the rock drill 9 is started.
  • the bit is now advanced through the overburden 6 and drills through any boulders or other obstacles which are encountered, as illustrated in FIGS. 1 and 2.
  • the drill bit is advanced, if desired, through the overburden down to bed rock 3, and such a suitable distance into bed rock as considered necessary for providing a safe anchorage.
  • the bit is drilled into bed rock 3 or 4 meters to be sure that it is bed rock and not a big boulder which has been encountered.
  • the draw member 23 pulls the tension members 18 along down into the hole but the drill steel rotation is not transmitted to the draw member 23 due to the bearing arrangement 28.
  • drilling is discontinued and flushing is also discontinued and injection of cement grouting or other stabilizing material from the pump equipment 50 starts while the drill string is still in position in the drill bit 13.
  • cement grouting, or similar material is injected through the passage 17 into the cavities in and around the drill bit 13, the draw member 23 and the flexible tension members 18 and also into cavities surrounding the hole produced by the drill bit 13, as is indicated at 53 in FIG. 2.
  • the amount of injected material naturally depends upon the condition of the rock or ground and the tension which it is intended that the tension anchor should be able to carry. Injection may be made just around the lower end of the tension members or all along said members or in certain areas as the case may be. It is also foreseen according to the invention to provide a not illustrated casing around the tension members in which case the drill bit should be of slightly larger diameter than the outer diameter of said casing and in such a way a concrete reinforced pile may be produced which may be particularly of advantage in cases where the ground may adversely affect the material of the tension members 18. When casing is used it is of course not necessary to draw the draw member and wire or cable bundle down simultaneously with drilling of the hole and driving down of the casing.
  • the drill string may be retracted and a special draw member provided thereon to which wires or other tension members are secured and which is then moved down through the casing to the bit by means of the drill feed. Afterwards the casing may be retracted by means of the feed or special winches and injection is made through the drill string as described or through the casing as described in my US. application Ser. No. 525,068 filed Feb. 4, 1966.
  • a suitable anchor head 54, 55 may be provided at the upper end of the tension members 18 as indicated in FIGS. 1 and 2. After a few days when the injected material has settled sufiiciently the tension anchors are tested for the desired tension with suflicient margin as may be stipulated for the particular job.
  • the method above described and illustrated in the drawings as well as the equipment illustrated should only be considered as examples and may be modified in various different ways within the scope of the following claims.
  • the method may for instance be used for various other purposes than for anchoring sheet piling, such as for anchoring power line masts, suspension bridges, darn structures and casings for harbours and water power stations and other building structures.
  • Tension anchor equipment comprising a drill string including a drill bit and a drill rod means arranged for transmitting rotation and percussion energy to said drill bit and to be withdrawn from said bit, a bundle of tension members surrounding said drill rod, a draw member in which said tension members are fixed, means for coupling said drawn member to the drill string for advancing the draw member into the hole but not rotating the draw member, means for advancing said equipment into the ground, and means for supplying grouting around the tension members.
  • Tension anchor equipment in which the drill bit is coupled to the draw member by a coupling which permits rotation of the bit relative to the draw member but which carries the draw member forward together with the bit when the bit is fed forward by a drill feed.
  • Tension anchor equipment in which a number of tension members are wound on a drum carried by a drill feed and fed from the drum into the hole to form an anchor together with the draw member.
  • Tension anchor equipment in which a guide hopper having a number of axially extending internal grooves for guiding tension members is provided at the forward end of a drill feed.
  • each of said tension members includes a socket and a pertaining coupling head pressure fitted thereon at one end, said coupling head being formed to engage said draw member.
  • a method for making a tension anchor in the ground by means of drilling equipment including a tubular drill string carrying a drill bit, the steps which comprise drilling a hole into the ground by means of said drilling equipment, surrounding said drill string by a bundle of flexible tension members, simultaneously drawing said bundle of flexible tension members down into said hole by a draw member disposed adjacent said bit, and injecting grouting around at least a portion of said bundle.
  • a method of making a tension anchor in the ground by means of drilling equipment including a tubular rotatable drill string carrying a drill bit capable of penerating rock, the steps which comprise drilling a hole into the ground by means of said drilling equipment, surrounding said drill string with a bundle of flexible tension members, drawing said bundle of flexible tension members down into the hole by a draw member rotatable relative to said drill string and said drill bit, and said draw member being carried down by said drilling equipment simultaneously with said drill bit during the drilling of said hole.
  • a method for making a tension anchor in the ground by means of drilling equipment including a tubular drill string carrying a drill bit and a drill wagon carrying a feed bar for said drill, the steps which comprise drilling a hole into the ground by means of said drilling equipment, providing one or more reels on said drill wagon on which a number of flexible tension members are wound for being fed in one or more bundles into said hole as drilling proceeds, simultaneously drawing said bundles of flexible tension members down into said hole by a draw member disposed adjacent said drill bit, and injecting grouting around at least a portion of said bundles.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Piles And Underground Anchors (AREA)
  • Earth Drilling (AREA)
US567800A 1966-07-07 1966-07-07 Method and equipment for making tension anchors Expired - Lifetime US3436923A (en)

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US56780066A 1966-07-07 1966-07-07

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US (1) US3436923A (enrdf_load_stackoverflow)
AT (1) AT306647B (enrdf_load_stackoverflow)
CH (1) CH459900A (enrdf_load_stackoverflow)
CS (1) CS149592B2 (enrdf_load_stackoverflow)
DE (1) DE1634237A1 (enrdf_load_stackoverflow)
ES (1) ES342617A1 (enrdf_load_stackoverflow)
FI (1) FI43290C (enrdf_load_stackoverflow)
GB (1) GB1137898A (enrdf_load_stackoverflow)
NO (1) NO120782B (enrdf_load_stackoverflow)
SE (1) SE319434B (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650112A (en) * 1970-09-21 1972-03-21 Howlett Machine Works Method of shoring and apparatus therefor
US3735541A (en) * 1971-07-08 1973-05-29 W Vanderlinde Method and device for anchoring tie-rods in ground
US3738071A (en) * 1970-08-21 1973-06-12 Dyckerhoff & Widmann Ag Tension element for constructing a prestressed tension anchor in the ground
US3753354A (en) * 1971-01-12 1973-08-21 K Bauer Corrosion-protected anchoring rods for anchoring structural parts in the earth, as well as method of producing anchorings with corrosion-protected anchor rods
US3807182A (en) * 1972-05-03 1974-04-30 H Schnabel Method of installing support tendons
US3861155A (en) * 1972-12-05 1975-01-21 Atomic Energy Commission Pumpable rockbolt method
US4079592A (en) * 1977-03-04 1978-03-21 The United States Of America As Represented By The Secretary Of The Interior Method of and apparatus for feeding and inserting bolts in a mine roof
JPS53125213U (enrdf_load_stackoverflow) * 1977-12-08 1978-10-05
US4289427A (en) * 1979-02-07 1981-09-15 Owens-Corning Fiberglas Corporation Process for installing roof bolts
US4360292A (en) * 1980-05-28 1982-11-23 Keeler Andrew L Grouted strand anchor and method of making same
US4708532A (en) * 1985-11-07 1987-11-24 Oy Tampella Ab Apparatus for storing a concrete feeding hose in a rock bolting device
US4708533A (en) * 1985-11-07 1987-11-24 Oy Tampella Ab Method and a device for guiding a concrete feeding hose in connection with the grout feed in rock bolting
US4710065A (en) * 1985-11-07 1987-12-01 Oy Tampella Ab Method, a device and a means for carrying out wire bolting of a rock
US4718791A (en) * 1985-11-15 1988-01-12 Schnabel Foundation Company High capacity tieback installation method
US4725096A (en) * 1985-11-07 1988-02-16 Oy Tampella Ab Method of and a device for carrying out wire bolting
US4728219A (en) * 1985-11-07 1988-03-01 Oy Tampella Ab Method of and a device for guiding a wire in the wire bolting of a rock
EP0368838A1 (de) * 1988-11-03 1990-05-16 Gerhard Dr.-Ing. Sauer Vorrichtung zur Absicherung von nicht bzw. mässig standfesten kohäsionslosen bis leicht kohäsiven geologischen Formationen
WO1993003256A1 (en) * 1991-07-26 1993-02-18 J.J.P. Geotechnical Engineering Pty. Ltd. A cable bolt
EP0582554A1 (en) * 1992-08-07 1994-02-09 Giuseppe Franco Darteni Method for consolidating soil and piercing bit for performing the method
US5465535A (en) * 1991-07-01 1995-11-14 Soilex Ab Method of installing a soil anchor and a soil anchor
WO2005090753A1 (de) * 2004-03-23 2005-09-29 Alwag Tunnelausbau Gesellschaft M.B.H. Verfahren und vorrichtung zur herstellung von vorgespannten verankerungen
US20070012484A1 (en) * 2004-03-23 2007-01-18 Josef Mocivnik Method and device for drilling a hole in soil or rock material and for forming an anchoring
JP2012184597A (ja) * 2011-03-07 2012-09-27 Fujita Corp グランドアンカー打設装置及び打設方法
US8429877B2 (en) * 2010-10-06 2013-04-30 F.J. Aschwanden Ag Method for reinforcement of concreted plates in the region of support elements
CN104532835A (zh) * 2014-12-17 2015-04-22 青岛理工大学 锚杆束复合抗拔加固设计强度的测定方法
CN108979666A (zh) * 2018-07-11 2018-12-11 河北工程大学 一种钢管混凝土桩控制巷道底鼓的方法
CN110397458A (zh) * 2019-07-03 2019-11-01 中铁四局集团第五工程有限公司 一种适用于塌方隧道扩建的三维加固施工方法

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FR2643096B1 (fr) * 1989-02-14 1991-05-10 Soletanche Tirant d'ancrage
EP0580887B1 (de) * 1992-07-30 1998-03-04 Philipp Holzmann AG Verfahren zur Herstellung von Litzenankern und zu deren Transport zur Baustelle sowie hierzu geeignete Vorrichtung
CN109139052B (zh) * 2018-09-30 2023-12-15 淮矿西部煤矿投资管理有限公司 一种基于高压深孔注浆的注浆孔装置及施工方法
CN112065446B (zh) * 2020-09-01 2022-11-01 中铁四局集团有限公司 一种超大纵坡隧道二次衬砌台车施工方法

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US1805265A (en) * 1926-02-17 1931-05-12 Raymond Concrete Pile Co Screw conveyer pile
FR1243359A (fr) * 1958-12-31 1960-10-07 Procédé pour la fixation dans le sol d'un dispositif d'ancrage travaillant à la traction
US3299644A (en) * 1965-08-27 1967-01-24 Spencer White And Prentis Inc Underpinning system and method of constructing same
US3363422A (en) * 1965-03-19 1968-01-16 Lee A. Turzillo Method and apparatus for anchoring a tie-down bar in an earth situs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1805265A (en) * 1926-02-17 1931-05-12 Raymond Concrete Pile Co Screw conveyer pile
FR1243359A (fr) * 1958-12-31 1960-10-07 Procédé pour la fixation dans le sol d'un dispositif d'ancrage travaillant à la traction
US3363422A (en) * 1965-03-19 1968-01-16 Lee A. Turzillo Method and apparatus for anchoring a tie-down bar in an earth situs
US3299644A (en) * 1965-08-27 1967-01-24 Spencer White And Prentis Inc Underpinning system and method of constructing same

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738071A (en) * 1970-08-21 1973-06-12 Dyckerhoff & Widmann Ag Tension element for constructing a prestressed tension anchor in the ground
US3650112A (en) * 1970-09-21 1972-03-21 Howlett Machine Works Method of shoring and apparatus therefor
US3753354A (en) * 1971-01-12 1973-08-21 K Bauer Corrosion-protected anchoring rods for anchoring structural parts in the earth, as well as method of producing anchorings with corrosion-protected anchor rods
US3735541A (en) * 1971-07-08 1973-05-29 W Vanderlinde Method and device for anchoring tie-rods in ground
US3807182A (en) * 1972-05-03 1974-04-30 H Schnabel Method of installing support tendons
US3861155A (en) * 1972-12-05 1975-01-21 Atomic Energy Commission Pumpable rockbolt method
US4079592A (en) * 1977-03-04 1978-03-21 The United States Of America As Represented By The Secretary Of The Interior Method of and apparatus for feeding and inserting bolts in a mine roof
JPS53125213U (enrdf_load_stackoverflow) * 1977-12-08 1978-10-05
US4289427A (en) * 1979-02-07 1981-09-15 Owens-Corning Fiberglas Corporation Process for installing roof bolts
US4360292A (en) * 1980-05-28 1982-11-23 Keeler Andrew L Grouted strand anchor and method of making same
US4708532A (en) * 1985-11-07 1987-11-24 Oy Tampella Ab Apparatus for storing a concrete feeding hose in a rock bolting device
US4708533A (en) * 1985-11-07 1987-11-24 Oy Tampella Ab Method and a device for guiding a concrete feeding hose in connection with the grout feed in rock bolting
US4710065A (en) * 1985-11-07 1987-12-01 Oy Tampella Ab Method, a device and a means for carrying out wire bolting of a rock
US4725096A (en) * 1985-11-07 1988-02-16 Oy Tampella Ab Method of and a device for carrying out wire bolting
US4728219A (en) * 1985-11-07 1988-03-01 Oy Tampella Ab Method of and a device for guiding a wire in the wire bolting of a rock
US4718791A (en) * 1985-11-15 1988-01-12 Schnabel Foundation Company High capacity tieback installation method
EP0368838A1 (de) * 1988-11-03 1990-05-16 Gerhard Dr.-Ing. Sauer Vorrichtung zur Absicherung von nicht bzw. mässig standfesten kohäsionslosen bis leicht kohäsiven geologischen Formationen
US5465535A (en) * 1991-07-01 1995-11-14 Soilex Ab Method of installing a soil anchor and a soil anchor
WO1993003256A1 (en) * 1991-07-26 1993-02-18 J.J.P. Geotechnical Engineering Pty. Ltd. A cable bolt
US5570976A (en) * 1991-07-26 1996-11-05 J.J.P. Geotechnical Engineering Pty. Ltd. Cable bolt
EP0582554A1 (en) * 1992-08-07 1994-02-09 Giuseppe Franco Darteni Method for consolidating soil and piercing bit for performing the method
US7320371B2 (en) 2004-03-23 2008-01-22 “ALWAG” Tunnelausbau Gesellschaft m.b.H. Method and device for producing pretensioned anchorings
US20070012482A1 (en) * 2004-03-23 2007-01-18 Josef Mocivnik Method and device for producing pretensioned anchorings
US20070012484A1 (en) * 2004-03-23 2007-01-18 Josef Mocivnik Method and device for drilling a hole in soil or rock material and for forming an anchoring
US7287608B2 (en) * 2004-03-23 2007-10-30 “ALWAG” Tunnelausbau Gesellschaft m.b.H. Method and device for drilling a hole in soil or rock material and for forming an anchoring
WO2005090753A1 (de) * 2004-03-23 2005-09-29 Alwag Tunnelausbau Gesellschaft M.B.H. Verfahren und vorrichtung zur herstellung von vorgespannten verankerungen
AU2005224274B2 (en) * 2004-03-23 2010-04-08 'alwag' Tunnelausbau Gesellschaft M.B.H. Method and device for boring a hole in soil material or rock material and for forming an anchoring
US8429877B2 (en) * 2010-10-06 2013-04-30 F.J. Aschwanden Ag Method for reinforcement of concreted plates in the region of support elements
JP2012184597A (ja) * 2011-03-07 2012-09-27 Fujita Corp グランドアンカー打設装置及び打設方法
CN104532835A (zh) * 2014-12-17 2015-04-22 青岛理工大学 锚杆束复合抗拔加固设计强度的测定方法
CN104532835B (zh) * 2014-12-17 2016-01-20 青岛理工大学 锚杆束复合抗拔加固设计强度的测定方法
CN108979666A (zh) * 2018-07-11 2018-12-11 河北工程大学 一种钢管混凝土桩控制巷道底鼓的方法
CN108979666B (zh) * 2018-07-11 2024-04-02 河北工程大学 一种钢管混凝土桩控制巷道底鼓的方法
CN110397458A (zh) * 2019-07-03 2019-11-01 中铁四局集团第五工程有限公司 一种适用于塌方隧道扩建的三维加固施工方法

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GB1137898A (en) 1968-12-27
FI43290B (enrdf_load_stackoverflow) 1970-11-02
ES342617A1 (es) 1968-08-01
DE1634237A1 (de) 1970-07-02
NO120782B (enrdf_load_stackoverflow) 1970-11-30
CS149592B2 (enrdf_load_stackoverflow) 1973-07-25
CH459900A (de) 1968-07-15
SE319434B (enrdf_load_stackoverflow) 1970-01-12
FI43290C (fi) 1971-02-10
AT306647B (de) 1973-04-25

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