WO2001057363A1 - Ancre a injection - Google Patents

Ancre a injection Download PDF

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Publication number
WO2001057363A1
WO2001057363A1 PCT/DE2001/000437 DE0100437W WO0157363A1 WO 2001057363 A1 WO2001057363 A1 WO 2001057363A1 DE 0100437 W DE0100437 W DE 0100437W WO 0157363 A1 WO0157363 A1 WO 0157363A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
injection
tube
bundle
expansion
Prior art date
Application number
PCT/DE2001/000437
Other languages
German (de)
English (en)
Inventor
Johannes Radtke
Original Assignee
Jora-Tec Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jora-Tec Gmbh filed Critical Jora-Tec Gmbh
Priority to AU2001240457A priority Critical patent/AU2001240457A1/en
Priority to EP01911419A priority patent/EP1255914A1/fr
Publication of WO2001057363A1 publication Critical patent/WO2001057363A1/fr
Priority to PL02355359A priority patent/PL355359A1/xx

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt 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
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • the invention relates to a method for securing fragile rock or subsoil, in particular for the expansion of routes and struts in mining and for tunnel construction, rock securing, subsurface consolidation, avalanche protection or the like, with an injection anchor, which is inserted into a bore and with a sealant in the rear area of the injection anchor is secured against being pushed out, and an injection anchor for using the method.
  • the slot wedge anchors are simple and cheap, but only adhere sufficiently in solid rock. When drilling, the required drill hole lengths must be strictly observed so that the wedge touches the deepest hole and the anchor head can spread sufficiently. When installing the anchor, it is advisable to hit a sleeve screwed onto the anchor with a demolition hammer and a chisel stump.
  • the cutting edge diameter For a slot wedge anchor of 22 mm diameter with a 140 mm long, 18 mm wide wedge at the top, the cutting edge diameter must be 27 mm for soft rock and 28 to 30 mm for harder rock. It must be ensured that the deepest hole in the borehole is not widened by empty drilling or is not round by blunt cutting. So far, it has only been possible to drill such precise holes in the roof, but not on the joints.
  • the expansion sleeve anchors have the advantages in front of the slot wedge anchors that they can be stolen and are independent of the hole length and the exact adherence to the hole diameter.
  • they carry an expansion sleeve, into which a conical nut screwed onto the thread is pulled to expand it.
  • the expansion sleeve is pushed up with a setting tube, while the conical nut is turned by turning the anchor rod with an approximately 70 cm long one Key, expediently a torque wrench, is pulled down and the sleeve is pressed against the borehole wall with a preload of 3 to 4 t (measured in the anchor axis) corresponding to the spreading force (with greased thread).
  • a lock nut is attached, on which the expansion sleeve is placed, so that a setting tube for holding the expansion sleeve is not necessary. If a higher spreading force is to be generated, a setting winch is screwed onto the anchor thread. It is supported at the top against the slope and pulls the anchor down with a force of around 6 t. Then the anchor plate is put on and the collar nut is tightened with a key, which creates a preload of 3 to 4 1.
  • the expansion sleeve and double wedge anchors are robbed by turning backwards. If the layers have shifted and the anchors are jammed, the anchor rod and accessories can usually be recovered.
  • the anchor rod In the wedge sleeve anchor, the anchor rod is wedge-shaped in its upper part. The anchor rod and wedge thus form a whole, the sleeve is pushed loosely over it.
  • a hydraulic setting tool is required for setting, which is screwed onto the thread of the anchor rod after a setting tube with a handle has been pushed over the anchor rod.
  • the anchor rod and setting pipe are then inserted into the borehole with the setting tool attached.
  • the now operated hydraulic pump extends the piston of the setting tool, so that the wedge forged onto the anchor rod is pulled into the sleeve and expands it while the setting tube holds the sleeve.
  • the resulting spreading force measured in the anchor axis is usually 8 t.
  • the setting tool is unscrewed, the setting tube is pulled out, the anchor plate with collar nut is placed under the hanging end and the setting device with the associated clamping frame is screwed again between the plate and the thread of the anchor rod.
  • the anchors for mining and tunneling described above are mainly based on the use of steel materials.
  • the anchoring principle can be described as that of an expansion anchor.
  • An injection anchor is known from German utility model 94 07 189, which has an anchor tube of 2 to 3 m in length, which can be flexible.
  • This known pipe anchor has a large number of radially arranged bores distributed uniformly over its length and circumference, through which the interior of the anchor tube is connected to the region of the borehole outside the anchor tube.
  • the front end of the anchor tube is open.
  • the anchor tube is provided with an inlet connection, through which cement suspension, for example cement glue, synthetic resin or the like, is brought into the interior of the anchor tube from the outside and from there through the radial bores and the open end of the anchor tube into the borehole.
  • this anchor tube is filled with an injection medium from the filling side under high pressure, this injection medium emerges at the front end of the anchor tube and through the bores distributed on the anchor tube. Because a large part of the injection medium emerges at the front open end of the anchor tube, essentially only the borehole is filled with injection medium, but not the region of the rock surrounding the borehole. This means that only the loose material around the anchor is filled in. The areas of the rock near the borehole are therefore not backfilled.
  • This known injection anchor has a simple connection at the rear end in order to be able to transport the injection material into the anchor. At the rear end of the injection anchor there is a borehole closure with which the anchor is clamped in the borehole so that the anchor does not fall out of the borehole.
  • the invention is based on the object of further developing a method and a device of the type mentioned in the introduction such that the injection medium introduced into the injection anchor under high pressure over the entire length of the anchor tube extends the borehole and furthermore the loose material located near the borehole, for example Injected cracks and fissures of the mountains.
  • the sealing element is designed to be elastically deformable and is connected to the injection anchor, lies within the bore after the injection anchor has been introduced and is filled with injection agent.
  • the injection agents to be introduced are pressed into the existing bore under a high filling pressure, so that in the past the injection anchor was often pushed out of the bore despite the existing tension.
  • the method according to the invention provides an elastically deformable sealing element, which comes to lie within the bore and even with the injection means. is filled up. As a result of the high filling pressure via the sealing element, the surrounding rock of the bore can be pressed to such an extent that the injection anchor cannot be pushed out to the rear.
  • the sealing element Due to the position of the sealing element at the rear end of the injection lance, the sealing element is filled at a very early stage, so that as a result of the hardening of the injection agent inside the sealing element, the injection anchor is first pressed into the rock before the injection agent continues into the bore and into the existing crack, fissures and loose material is pressed.
  • the sealing element can be filled at the same time or before the rock or underground is filled.
  • the sealing element is at least partially filled with a solidification accelerator (BE) before the injection anchor is introduced.
  • BE solidification accelerator
  • the bore is at least partially piped and that after the injection anchor is inserted, the pipes are pulled again before the injection is carried out becomes.
  • the piping prevents the loose material from collapsing and hindering the introduction of the injection anchor.
  • the pipes can be pulled and reused later, the injection of the injection agent further solidifies both the loose material and the other cracked and cracked solid rock.
  • the method according to the invention is characterized by its usability radial securing of the surrounding rock, loose material and subsoil and in particular during axial propulsion if, for example in a tunnel construction, the rock has to be solidified before the further processing machines can be used.
  • Such operations are preferably used in the leading ridge and face protection to solidify the loose material.
  • the loosening material can also be solidified in the area of the axial expansion by the injection, for example by cement or resins, in such a way that optimal safety conditions can be established.
  • the injection anchor is equipped with a drill bit, in particular a one-way drill bit, and is used to produce the hole, for example in soft materials.
  • a drill bit in particular a one-way drill bit
  • the holes can be drilled and the injection anchor inserted in one step, provided the material is soft and loose.
  • the injection anchor consists of an inner core with a single anchor tube or, if appropriate, an anchor bundle and an injection line, which are covered with an outer skin that is permeable to the injection agent.
  • an injection anchor is used to apply the method, in particular for the expansion of stretches and struts in mining and for tunnel construction, rock securing, subsurface consolidation, avalanche protection and the like, with an anchor tube or an anchor bundle and an injection line for inserting the injection anchor into one Drill hole in the rock to be held and with radial injection holes distributed over the circumference over the length of the anchor pipe or the injection line, as well as with a filler neck for an injection agent at the rear end of the injection anchor and with a sealing element in the rear area of the anchor pipe or anchor bundle, which is suggested is characterized in that an elastically deformable sealing element of a certain length is provided on the armature tube or armature bundle, at least in the rear area thereof, which is partially filled with a solidification accelerator (BE) both ends is held with a fastener on the anchor tube or anchor bundle.
  • BE solidification accelerator
  • an injection anchor is obtained which reliably and completely fulfills the aforementioned task of the invention.
  • the sealing element at the rear end of the injection anchor which is partially filled with a solidification accelerator (BE)
  • BE solidification accelerator
  • Due to the solidification accelerator very rapid solidification occurs, so that the injection anchor is reliably and securely seated in the borehole.
  • the injection agent escapes into the environment under the same pressure in the remaining area of the injection anchor, as a result of which the borehole is filled with filling medium and, in addition, the cracks, fissures and the loose material are pressed.
  • the inner core consists of an anchor tube or anchor bundle and an injection line as well as a surface or outer skin surrounding it, the outer skin or surface of the anchor tube or anchor bundle preferably consisting of a metallic or plastic-like braided hose, so that better adhesion with the binders in the borehole.
  • the bundle of anchors is held together by one or more spacers over the entire axial length of the injection anchor. In today's world in particular, solidification by long-lasting injection anchors of great length is of great importance, particularly when securing rocks and embankments.
  • This method or this injection anchor can also be used for the rehabilitation of tunnel sections or for securing underground, because radial use is possible and, in particular, existing masonry, cracks and fissures can be injected out. As a result, an intimate bond of the materials that may have been loosened by earthmoving is restored and furthermore an optionally necessary optimal water seal is guaranteed.
  • the anchor tube, the anchor bundle and / or the injection line is an antistatic Has coating.
  • the inner core can also consist entirely of plastic or of plastic with metallic wires or with thin-walled, perforated and metallic tubes or of metal, for example hollow rods. If metallic braided sleeves are not used for the injection anchors, an antistatic coating of the anchor tube, the anchor bundle and the injection line is sufficient. Injection anchors made of fiber-reinforced plastic with or without metallic wires or thin-walled, perforated pipes are preferably used for the leading ridge and face protection, because the injection anchors can be cut by the partial or full-cut machines used.
  • the anchor tube and the inner core can be extended by connecting sleeves, in particular made of stainless materials.
  • These injection anchors, which are extended by the connecting sleeves, enable use in all bores with large penetration depths of several meters, while the long-lasting load is guaranteed due to the rustproof materials.
  • a further embodiment of the invention provides that the perforations of the anchor tube or the injection line are evenly distributed over the axial length or made in sections.
  • the injection means can penetrate into the surrounding rock or underground through the perforation of the inner core, the perforation usually taking place over the entire axial length of the injection anchor.
  • injection anchors are used which only have perforations of the inner core in sections.
  • injection anchors without perforation can also be provided, so that the perforation can be carried out later on site depending on the conditions found.
  • the necessary sealing element for strengthening the injection anchor within the bore can consist, for example, of a filling hose, in particular of a flame-retardant and / or antistatic textile fabric. On the one hand, this ensures elastic deformability and, on the other hand, the antistatic nature of the injection anchor for mining is basically maintained.
  • the filling tube is preferably passed over the outer skin at the end and fastened with a shrink tube.
  • Additional sealing means for pressing the injection anchor within the existing bore can be arranged at least partially, preferably in the rear area, via the filling tube or the shrink tube so that the injection means is not pushed out of the borehole to the rear.
  • the necessary hole for the injection anchor is made only a few millimeters larger than the diameter of the injection anchor.
  • a flexible borehole closure, which receives the injection anchor and the sealing element, is preferably used for sealing.
  • Cement glue, synthetic resin or the like is expediently provided as the injection means.
  • This injection medium is sufficiently liquid to fill the borehole under pressure and also to reach the surrounding mountains.
  • the anchor bundle and the injection line consist of mixed fibers, for example Keflar, carbon or aramids.
  • the injection bores within the sealing element are expediently covered loosely or by a protective film so that the solidification accelerator (BE) located in the filling hose cannot get into the bores of the anchor tube.
  • BE solidification accelerator
  • All injection bores can be designed as a continuous bore or up to the axial bore of the anchor tube or the injection line, which can be offset over the circumference, for example by 90 degrees in each case. So that the friction between the anchor tube and its surroundings is particularly high, the surface of the anchor tube can be uneven, in particular thread-like or groove-like.
  • the outer surface of the anchor tube can also be roughened, in particular sanded. This also improves the seat of the anchor tube in the mountains.
  • the front end of the anchor tube or the anchor bundle is designed to be closable or closed so that the filling pressure cannot escape here.
  • a disposable drill bit which is closed at the front, is expediently provided on the front end of the anchor tube. This enables loose rock to be drilled directly with the injection anchor or the anchor tube with the disposable and closed one-way drill bit attached at the front. In solid rock, however, a drill hole of sufficient depth and required cross-section is first drilled with a drill pipe and a drill bit, then the drill pipe is pulled out of the drill hole with the drill bit and then re-drilled with the injection anchor with the single-use crown attached and closed. In this position the injection anchor remains in the borehole. Alternatively, there is the option of attaching an end piece with a drill cap.
  • a threaded sleeve with an external thread and a conical bore is attached to the rear end of the anchor tube, the threaded sleeve projecting slightly beyond the end of the anchor tube and the conical bore tapering towards the front so that the rear area of the anchor tube has expansion slots oriented in the longitudinal direction of the anchor tube and an expansion cone with a cylindrical bore is clamped in the rear end of the anchor tube while spreading the anchor tube parts located between the slots. This ensures secure attachment within the threaded sleeve.
  • the expansion cone is equipped with expansion slats which protrude into the expansion slots or that wedge nails are inserted into the expansion slots. It is also recommended that the threaded sleeve is glued to the rear end of the anchor tube and to the expansion cone located inside the threaded sleeve, which is pressed in, for example, with a hydraulic press at approx. 150 bar. This creates an optimal connection to maintain the transmission forces for the bracing.
  • the cylindrical bore of the expansion cone is expediently connected to an inlet or conventional pressure connection for the injection medium, a filling tube opening into the injection line or the anchor tube.
  • the invention also relates to an injection anchor, in particular for the expansion of routes and struts in mining and for tunnel construction, rock securing, sub-consolidation, avalanche protection and the like with an anchor bundle and an injection line for inserting the injection anchor into a borehole in the mountains to be kept and with radial injection bores distributed over the circumference and over the length of the injection line, as well as with a filler neck for an injection agent at the rear end of the injection anchor and with a sealing element in the rear area of the anchor bundle.
  • the injection anchor can consist of a single anchor tube or, if appropriate, of an anchor bundle with an injection line.
  • the use of the respective injection anchor shape depends on the local conditions or the intended use, it being possible for both design variants to be used to carry out the method and to have the further advantageous features and configurations.
  • the injection anchor can be designed such that an expansion cone is also pressed into the annular space between the outer threaded sleeve and the anchor bundle, consisting of a plurality of bundle rods, and the injection line is arranged centrally and connected to the filling tube of the expansion cone.
  • This clamping connection of the bundle rods between the outer threaded sleeve and the inner expansion cone results in a particularly high load-bearing capacity of the injection anchor head.
  • the anchor bundle or the bundle rods are appropriately clamped between the threaded sleeve and the expansion cone at the rear end of the injection anchor in order to ensure a secure hold.
  • the cavity between the anchor bundle and the threaded sleeve can also be closed with pressed-in expansion wedges with or without resin bonding.
  • anchor pipe and the bundle rods must be flame-retardant for mining.
  • anchor tube and bundle bars must be antistatic for mining.
  • the injection anchor can also be designed in such a way that a filling tongs are provided for filling the injection agent into the injection anchor from a pump containing the injection agent, the filling tongs being securely attachable to the inlet connector of the injection anchor.
  • the filling pliers have a central inlet pipe with a bearing block, on which two opposite double levers are pivotally mounted against each other, at the ends near the anchors there is a holding jaw each, which can be attached to the inlet socket.
  • FIG. 3 is a view in the direction of arrow III of FIG. 2,
  • FIG. 4 shows a longitudinal section along the line IV-IV from FIG. 2
  • FIG. 5 5 shows a longitudinal section through an injection anchor located in a borehole
  • FIG. 8 8 shows a longitudinal section along the line VII-VIII from FIG. 6,
  • FIG. 9 9 shows a longitudinal section along the line VIIa-VIIa from FIG. 6,
  • FIG. 1 100 shows a longitudinal section through an injection anchor with a connection
  • FIG. 11 shows a longitudinal section through an injection anchor located in a borehole
  • FIG. 12 shows a cross section through a tunnel section with ridge
  • FIG. 13 shows a reduced representation of the tunnel route according to FIG. 12 and
  • FIG. 14 shows a sectional side view of the tunnel route according to FIGS. 12 and 13.
  • a route 1 is shown with a steel structure 2.
  • injection anchors 3, 4, 5 are placed in the mountains 6 surrounding route 1.
  • the mountain range 6 has many gaps and set cracks 7, in particular on the route seam, so that it is necessary to secure the route seam against falling rock or to expand it with the steel construction 2 or to expand it solidify and expand using injection anchors.
  • injection anchors 3 can be used according to the invention, which can be recorded by the extraction machines.
  • the injection anchor 50 shown in FIGS. 2, 3 and 4 consists of an anchor tube 8 with an injection channel 9, from which injection holes 10, 11, 12 branch perpendicular to the anchor tube 8 and further injection holes 13, 14 perpendicular to these.
  • a one-way drill bit 16 is fastened, for example glued.
  • the injection channel 9 at the front end of the anchor tube 8 is closed by the one-way drill crown 16.
  • the disposable core bit 16 can be used to make the hole in soft material.
  • the latter is provided with four expansion slots 18, 19, 20, 21 which run in the longitudinal direction of the anchor tube 8.
  • the parts 22, 23, 24, 25 of the anchor tube 8 are located between the expansion slots 18, 19, 20, 21.
  • a sleeve 26 with an external thread 27 and a conical bore 28 is glued onto the slotted end 17 of the anchor tube 8.
  • An expansion cone 30 with a conical outer surface 31 is inserted into the injection channel 9 from the rear end 29 of the injection tube anchor.
  • the expansion cone 30 makes it possible to expand the parts 22, 23, 24, 25 of the anchor tube 8 located between these slots in such a way that these parts 22, 23, 24, 25 between the conical bore 28 of the threaded sleeve 26 and the conical surface 31 of the expansion cone 30 are firmly clamped or wedged.
  • the expansion cone 30 is further configured with expansion slats 48 which protrude into the expansion slots 18, 19, 20, 21.
  • wedge nails or wedges can be inserted into the expansion slots 18, 19, 20, 21, in order to ensure that the expansion slots 18, 19, 20, 21 remain open through the wedge nails or wedges, so that they widen Connection is not released by high pressure or high forces.
  • the anchor tube 8 can also be sheathed with a braided hose 56 made of metal or plastic, so that better adhesion takes place within the rock after the injection.
  • FIG. 5 shows a borehole 33 drilled in a rock 32, in which an injection anchor 50 according to FIGS. 2-4 is located.
  • the one in borehole 33 Injection anchor 50 used has at the rear end of anchor tube 8 the sealing element, partially filled with solidification accelerator, in the form of a filling hose 34.
  • the filling tube 34 is further fastened to the injection anchor 50 by means of two shrink tubes 35, 35a.
  • Injection bores 10, 11, 12, 13, 14 branch off from the injection channel 9, via which the filling hose 34 is filled with injection agent when injection agent is pressed into the injection anchor 50 under high pressure.
  • the threaded sleeve 26 In front of the mountain 32 is the threaded sleeve 26, which has already been described in FIG. 2.
  • a filler neck 36 with a filler pipe 37 is arranged in front of the outer end 29 of the injection anchor 50 and protrudes into the injection channel 9.
  • the anchor tube 8 is braced with the threaded sleeve 26, as described in FIG. 2, a nut 51 being screwed onto the threaded sleeve and pressing a borehole cover 52 against the rock 32, so that as far as possible no injection agent can emerge from the rear of the bore.
  • the borehole 33 is sealed at the rear end by a borehole closure 49 receiving the injection anchor 50.
  • FIGS. 6, 7, 8 and 9 show an injection anchor 55 which has an anchor bundle consisting of four bundle rods 38, 39, 40 and 41.
  • a centrally arranged injection line 42 is located between the bundle bars 38, 39, 40, 41.
  • the bundle bars 38, 39, 40, 41 and the injection line 42 are held in their desired position by one or more spacers 43, the one on the threaded sleeve 26 adjacent spacers 43 can be used for sealing at the same time.
  • Injection openings 44, 45, 46, 47 are provided in the injection line 42, so that the injection agent pressed under high pressure into the rear end of the injection anchor 55 can escape through these injection openings 44, 45, 46, 47.
  • the bundle bars 38, 39, 40, 41 are firmly clamped or wedged between the conical bore 28 of the threaded sleeve 26 and the conical surface 31 of the expansion cone 30 and are pressed in with great force. This ensures in particular a large holding force between the bundle bars 38, 39, 40, 41 and the threaded sleeve 26.
  • At the rear end of the injection anchor 55 is a with the Threaded sleeve 26 or the filler neck 36 connected to the injection line 42, via which the injection agent can be supplied.
  • the filler neck 36 is provided for receiving commercially available connecting hoses.
  • an expanding wedge 68 in order to wedge the bundle bars 38, 39, 40 and 41, the expanding wedges 68 possibly inside the threaded sleeve 26 can also be held by resin bonding.
  • the expansion wedges 68 are pressed in, for example, by a hydraulic press with a pressure of up to 150 bar, similar to the anchor tube of the injection anchor 50.
  • an end piece 66 with a drill closure 67 is placed, which seals the injection line 42.
  • Figure 8 shows a cross section along the connecting line VIII to VIII, which runs in the plane of the first spacer 43.
  • the spacer 43 can also be used, for example, for sealing against the threaded sleeve 26.
  • the further spacers 43 serve only to fix the bundle rods 38, 39, 40 and 41 and the injection line 42 within the braided hose 56, as shown in FIG. 9.
  • Figure 10 shows a sectional view of the connection of two anchor tubes 8 through a connecting sleeve 57.
  • the connecting sleeve 57 can be used in a single or multiple arrangement to extend the anchor tube 8 so that 50 long drilling depths can be achieved with an extended injection anchor.
  • the connecting sleeve 47 with an internal thread 58 is screwed directly onto the threaded sleeves 26 located at the end.
  • the centered arrangement of the connecting sleeve 57 ensures that the injection channels 9 of the two anchor tubes 8 are connected to one another.
  • the anchor tube 8 is provided with sanding 69, which improves the hold within the mountains.
  • FIG. 11 shows an injection anchor 55 according to the invention
  • the injection anchor 55 is inserted as already described in FIG. 5, only the injection anchor 50 being replaced by an injection anchor 55 with bundle bars 38, 39, 40, 41.
  • a connecting sleeve 57 is used to connect the individual injection anchors 55, which is screwed onto the threaded sleeve 26 according to FIG. 10 and ensures a secure hold between the individual injection anchors 55.
  • FIG. 12 shows a tunnel section 59 with a steel or concrete structure 60, with injection anchors 50 or 55 being inserted into the surrounding mountains 63 at different angles, starting from the tunnel wall.
  • the mountains 63 have many gaps and set cracks 64, so that it is necessary to secure the tunnel seam against falling rock or to connect it to the steel or concrete lining 60.
  • several injection anchors 55 which solidify the loose rock before the tunneling machines are used, are used to further expand the tunnel for leading ridge and face protection.
  • Injection anchors 55 made of plastic are preferably used for this area of application, which are reinforced with wires or thin-walled, perforated tubes, if necessary. This makes it possible to record the injection anchors 55 used with partial cut and full cut machines.
  • the injection anchors used for coal mining in the line / face transition can be cut safely with the extraction machines without sparking, as with iron anchors.
  • FIG. 13 shows the tunnel route 59 known from FIG. 12 on a reduced scale
  • FIG. 14 shows a sectional side view of the tunnel route 59.
  • This sectioned side view shows in particular the depth of penetration of the injection anchors 55 and the position of the tunnel section 59 to be expanded.
  • the injection anchors 50, 55 are used almost axially to extend the tunnel to secure the ridge and face, while oblique holes for receiving the injection anchors 50, 55 are provided to secure the cover rock.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un procédé et une ancre à injection (50) pour la mise en oeuvre dudit procédé, destinés à sécuriser des roches ou des sols fragiles, en particulier pour la construction de galeries (1) et de chantiers chassants, ainsi que pour la construction de tunnels, la sécurisation de rochers, le renforcement de sols, la construction de barrages antiavalanches ou similaires. Selon l'invention, on introduit une ancre à injection (50) dans un forage, et on sécurise cette ancre (50) contre l'expulsion dans la zone arrière au moyen d'un agent de compaction. L'invention vise à améliorer le maintien de l'ancre dans le forage. A cet effet, l'ancre à injection (50) présente côté terminal un élément de compaction à déformation élastique. Cet élément de compaction est par exemple composé d'un tuyau de remplissage (34) au moins partiellement rempli d'un catalyseur de prise destiné à l'agent d'injection correspondant, le tuyau de remplissage étant rempli au cours du processus d'injection, et provoquant une compression de l'ancre à injection (50) dans le trou de forage à la suite de la prise de l'agent d'injection.
PCT/DE2001/000437 2000-02-05 2001-02-02 Ancre a injection WO2001057363A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2001240457A AU2001240457A1 (en) 2000-02-05 2001-02-02 Injection anchor
EP01911419A EP1255914A1 (fr) 2000-02-05 2001-02-02 Ancre a injection
PL02355359A PL355359A1 (en) 2000-02-05 2002-08-05 Method of stabilising loose rocks or soils, in particular those encountered in mine workings, by means of injection anchors and injection anchor therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20001930.9 2000-02-05
DE20001930U DE20001930U1 (de) 2000-02-05 2000-02-05 Injektionsanker

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DE102010043769A1 (de) * 2010-11-11 2012-05-16 Hilti Aktiengesellschaft Ankerbaugruppe, insbesondere für den Berg- und Tunnelbau
CN108007781A (zh) * 2017-11-17 2018-05-08 山东科技大学 动静组合载荷下巷道支护体力学模拟试验系统及其方法
CN110242335A (zh) * 2019-05-27 2019-09-17 山东科技大学 大变形回采巷道主被动耦合支护系统及施工方法

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DE102010023627B4 (de) * 2010-03-08 2012-07-26 Markus Swoboda Selbstbohranker
CN102182482A (zh) * 2011-04-25 2011-09-14 义马煤业集团股份有限公司跃进煤矿 防冲复合抗压支护系统
CN106968140B (zh) * 2017-04-16 2019-03-15 中铁二院工程集团有限责任公司 一种无砟轨道铁路隧道上拱修复结构的施工方法

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Publication number Priority date Publication date Assignee Title
DE102010043769A1 (de) * 2010-11-11 2012-05-16 Hilti Aktiengesellschaft Ankerbaugruppe, insbesondere für den Berg- und Tunnelbau
CN102562107A (zh) * 2010-11-11 2012-07-11 喜利得股份公司 特别是用于采矿工程和隧道工程的锚栓组件
DE102010043769B4 (de) * 2010-11-11 2015-07-09 Hilti Aktiengesellschaft Ankerbaugruppe, insbesondere für den Berg- und Tunnelbau
CN102562107B (zh) * 2010-11-11 2016-08-03 喜利得股份公司 特别是用于采矿工程和隧道工程的锚栓组件
AU2011250703B2 (en) * 2010-11-11 2017-05-11 DSI Underground Australia Pty Limited Anchor module, in particular for mining and tunneling
EP2455582A3 (fr) * 2010-11-11 2017-05-17 Dywidag-Systems International PTY Limited Composant d'ancrage, notamment pour la construction en montagne et de tunnels
CN108007781A (zh) * 2017-11-17 2018-05-08 山东科技大学 动静组合载荷下巷道支护体力学模拟试验系统及其方法
CN110242335A (zh) * 2019-05-27 2019-09-17 山东科技大学 大变形回采巷道主被动耦合支护系统及施工方法

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EP1255914A1 (fr) 2002-11-13
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AU2001240457A1 (en) 2001-08-14

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