CN2911011Y - Prestressed anchor arm device - Google Patents

Prestressed anchor arm device Download PDF

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Publication number
CN2911011Y
CN2911011Y CN 200620104356 CN200620104356U CN2911011Y CN 2911011 Y CN2911011 Y CN 2911011Y CN 200620104356 CN200620104356 CN 200620104356 CN 200620104356 U CN200620104356 U CN 200620104356U CN 2911011 Y CN2911011 Y CN 2911011Y
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CN
China
Prior art keywords
anchor
anchor bar
free
spiral shell
sleeve pipe
Prior art date
Application number
CN 200620104356
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Chinese (zh)
Inventor
吴德兴
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吴德兴
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Priority to CN 200620104356 priority Critical patent/CN2911011Y/en
Application granted granted Critical
Publication of CN2911011Y publication Critical patent/CN2911011Y/en

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Abstract

The utility model discloses a reinforced prestressed anchor, which comprises an anchor body, a bearing pad, a locking nut, a centring device, a free section casing pipe, a grouting and exhausting channel. The anchor body is divided into an external anchor section,an anchorage section and a free section. The external anchor section consists of the bearing pad, the locking nut and a section of the external anchor body; the anchor body of the free section is encased with free section casing pipe. The pipe is fixxed by two end fastening units thereof on the end of the anchor body close to the bearing pad and can rotate with two end fastening units. The middle part of the pipe separated from the anchor body forms a isolation cavity. The utility model can be applicable to the geotechnical anchorage support of underground works, pit and rock slope engineering and can solve the grouting problem of the anchorage section and free section in the prestressed long anchor construction. This utility model can makes construction simple and easy, and has great developing prospects in geotechnical engineering support especially in supporting slope, can substitute low prestressed cable and has high performance-price ratio.

Description

A kind of prestress anchor device

Technical field

The utility model relates to geotechnical engineering anchoring support technical field.A kind of prestress anchor device that the utility model proposes is a kind of improvement to support anchor rod device and mounting process method.Be applicable to the ground anchorage supporting in underground construction, foundation ditch, the slope project.

Background technology

In underground construction, mining engineering, foundation ditch and the slope project process that geotechnical engineering relates to, for preventing that stratum deformation from caving in or unstability jeopardizes safety, a kind of main support technology that the stratum is reinforced is to adopt anchor pole.By be arranged on anchor pole had in the stratum high strength resistance to tension and by closely knit mode such as combine between anchor pole and injecting cement paste around the anchor pole and the stratum with stratum consolidation, with the globality on raising stratum.With the control stratum deformation, make it to reach the stability and safety state.The development of this technology is existing century-old history, and proposes multiple bolt support type and technology to adapt to the different stratum and the needs of different condition.

Anchor pole can divide prestressed anchor and non-prestressed anchor pole.Prestressed anchor gives the pressure in advance in stratum and carries out active support before anchor pole is installed and played a role, the control stratum deformation, and supporting effect is good; Non-prestressed anchor pole is installed the back at anchor pole and is produced supporting power with distortion back, stratum, is passive protecting, and supporting effect is poor.Require high and the big occasion of anchored force for the control stratum deformation, prestressed anchor is topmost selection.Prestressed anchor can be divided into by the rigidity of the body of rod: make the bar reinforcement prestressed anchor (Bar anchor) of the body of rod and make anchor cable prestressed anchor (strand anchor) the two big classes of the body of rod with flexible high-strength steel hank knotting with reinforcing bar or steel pipe.The multi beam type anchor pole (multi-strand anchor) that Anchor cable-rod is generally formed with many steel hank knottings based on prestressing force, because construction is complicated, requires high to plant equipment.Be applicable to that generally anchored force has greater than 500KN, the stratum that length 10m is above.And bar reinforcement prestressed anchor anchored force is generally used less than 500KN, and the machinery that is adopted is simple, easy construction, so use maximum prestressed anchors at present, be widely used in middle-size and small-size anchoring need the stratum supporting in.As traffic tunnel, water conservancy and hydropower tunnel, mining tunnel, general foundation ditch and slope retaining.

In the bar reinforcement prestressed anchor: 1) can be divided into mechanical. points anchor formula and full bond-anchorage type by the prestress anchoraging segmented mode.2) can divide non-binding type prestressed anchor and binding type prestressed anchor by the free section of prestressed anchor.3) can be divided into solid prestressed anchor pole and hollow (hollow) prestressed anchor by body of rod shape.

According to " Technical code for shotcrete rock bolts shore " (GB50086-2001) described in, prestressed anchor is made up of anchor head (locking prestressing force load means), presstressed reinforcing steel, anchorage head (body), utilize the elastic elongation of the free section of presstressed reinforcing steel, anchor pole is applied prestressing force so that active support power to be provided.In above-mentioned prestressed anchor type, the anchoring section of mechanical. points anchor formula prestressed anchor is the mechanical type anchorage head, and anchor rod body is the free section of prestressed anchor, and outer anchor head is made up of prestressing force locking accessory backing plate and nut.The anchoring section of full bond-anchorage type prestressed anchor then with one section of the front end of anchor pole as anchoring section, be free section but pretend near one section of the rear end of anchor head elastic elongation before applying prestressing force, outer anchor head is made up of prestressing force locking accessory backing plate and nut.Following several types is specifically arranged:

1. mechanical. points anchor formula prestressed anchor: wherein a kind ofly utilizing the shell power that rises of anchor head to form a some anchor-hold as expansion type rock bolt Chinese patent " a kind of shell anchor pole that rises " ZL200320107953.5 (number of applying for a patent 200310108547.5), is the anchor-hold that non-binding type anchoring produces.Shell power is by shell and the hole wall friction formation of rising owing to rise, so be only applicable to preferably in the rock stratum.

2. full bond-anchorage type prestressed anchor: as Chinese patent " a kind of anchor rod support method and the segmented hollow grouting anchor " patent No. 200310108547.5) form for two sections by the solid body of rod of front end and rear portion hollow lever.The solid stem body of front end with early strong anchoring agent anchoring after as anchoring section, the rear portion hollow lever constitutes prestressed anchor as free section.Country rock situation under the applicable various condition, but because anchoring section requires in advance with powder stick or cement once grouting, and free section requires secondary grouting, construction technology is complicated, and anchor bolt construction length is limited to some extent.

3. the non-binding type prestressed anchor of free section: adopt the band plastic bushing as presstressed reinforcing steel in " Technical code for shotcrete rock bolts shore " mentioned free section, should fill cement mortar or clean slurry between sleeve pipe and hole wall, should take the prestressed anchor of grouting synchronously in anchoring section length and free section.Its process generally is with sleeve pipe freedom section to be isolated earlier, make anchor rod anchored section with the outer once grouting of free section sleeve pipe, apply prestressing force after, again to carrying out slip casting between free section sleeve pipe and anchor bar body.Its later stage construction technology is comparatively complicated.

In sum, in the prestressed anchor supporting, the complete free no sleeve pipe of section of binding type (above-mentioned the 3rd class) requires secondary grouting, and construction is complicated; The shell anchor pole that rises in the mechanical. points anchor formula prestressed anchor (above-mentioned the 1st class) though can cross anchor bar body and organically combine with the shell anchorage head that rises and be once grouting, can make things convenient for spreading but it is only applicable to ROCK CONDITIONS.

Summary of the invention

The utility model provides a kind of improvement of full bond-anchorage type bar reinforcement prestressed anchor, not only can be used for the rock stratum condition but also can be used for the soil layer condition, not only can guarantee freely extending but also reaching dual antiseptic property of presstressed reinforcing steel, and slip casting is once finished, skyhook, to apply prestressing force very convenient, and technology is simple, slip casting is reliable.

A kind of prestress anchor device, comprise anchor bar body, bearing plate, locking nut, centralizer, free section sleeve pipe, termination fastener device, slip casting and exhaust passage, anchor bar body is divided into outer anchor section, free section and anchoring section, described anchor bar body is hollow or solid, and free section sleeve pipe is set on the anchor bar body and by two termination fastener device its screw thread is fixed near on the anchor bar body of bearing plate one end; Described free section sleeve pipe can with two termination fastener device on anchor bar body, rotate move, mid portion separates formation isolation cavity with anchor bar body.

Described termination fastener device is made up of casing joint and body of rod spiral shell button; Described casing joint is that the ganoid external diameter of a joint equates the straight short tube of thin-walled, one end inner chamber straight circular hole such as is and cooperates with the external diameter of sleeve pipe, other end inner chamber is that inner small and outside big conical bore, its surperficial gradient matches with the outer poppet surface of body of rod spiral shell button, the taper hole inner surface has the vertical protruding key of two subtends, matches with groove, the opening that body of rod spiral shell is buckled.Described body of rod spiral shell button is smooth outer surface and the opening nut that is circular cone shape, and fluted at the symmetry place over against opening; Its screw thread cooperates with the external screw thread of anchor bar body; Its opening and groove can match with the protruding key in the casing joint.

A described free section sleeve pipe is one section equal diameters and ganoid straight tube, its internal diameter greater than the external diameter of anchor pole, and can freely be through on anchor bar body slides, its external diameter cooperates with an end internal diameter of casing joint.

On the described free section sleeve pipe oil filler point can be arranged, also can not have oil filler point.Be that non-oiling is isolated during no oil filler point.There is oil filler point can realize the oiling isolation, realizes the permanent support purpose.Respectively there are an oil filler point or steam vent in appropriate location in that two end surfaces appropriate locations of sleeve pipe are not covered by joint, and one is used for oiling, and another is used for exhaust.Sleeve pipe is through on the anchor bar body, and cooperate two terminations to be fixed on the anchor bar body with sleeve pipe by casing joint and body of rod spiral shell button, wherein an end is close to bearing plate one side and is fixed, sleeve pipe does not contact to form with anchor bar body isolates cavity, realize body of rod Free Transform effectively thereby this section anchor bar body and the external world are separated, form the free section of prestressed anchor.Body of rod spiral shell button can form the appropriate location that opening is stuck in it anchor bar body easily by breaking into two with one's hands or opening.Sleeve pipe closes tightly on anchor bar body it by the casing joint cooperation that is connected with body of rod spiral shell button.Casing joint matches with groove, the opening of body of rod spiral shell button through its conical surface, protruding key and is connected, and the threaded engagement of spiral shell button and anchor bar body, makes sleeve pipe can realize adjusting the function of position, locking and sealing on anchor bar body.

Described free section sleeve pipe is to be fixed on like this on the anchor bar body: at first a spiral shell button is snapped on the anchor bar body, and casing joint is inserted in anchor bar body, its taper hole end face should aim at the spiral shell button, simultaneously protruding key and opening and groove are matched merge to insert, chucking, form one group of termination mouth spare device.This moment, the spiral shell button can drive joint screw thread rotation on anchor bar body.Then, put on sleeve pipe, the one end inserts in joint one end, and cooperates with its inner surface.Once more, by the first step another group termination mouth spare is installed, its installation direction is relative with last group of termination mouth spare direction, and the other end with anchor bar body inserts in joint one end of this group termination mouth spare subsequently, and cooperates with its inner surface.At last, rotate two groups of fasteners sleeve pipe is fixed on the anchor bar body, form free section.

Oil filler point on the described sleeve pipe can make free section anchor bar body and outside better the isolation by filling pump perfusion anticorrisive agent such as lithium base butter etc. in the cavity between anchor bar body and the sleeve pipe, improves antiseptic property and service behaviour.

Described at anchor bar body free section and anchoring section on a centralizer is arranged at least respectively, to realize preventing that anchor pole from moving in stratum installing hole meta offset, assurance slip casting and anchor pole work effect.Described centralizer can be the slider of wheel shape, also the slider of the olive shape that can be made up of a plurality of lobes.When adopting the slider embodiment of wheel shape, it is characterized in that having on the centralizer connection female cone hole, the vertical protruding key that two subtends are arranged in the taper hole matches with the male cone (strobilus masculinus) of a body of rod spiral shell button and opening and groove, is fixed on the anchor bar body by the spiral shell button.When the slider embodiment of the olive shape that adopts a plurality of lobes to form, it is characterized in that the limb number of olive-shaped slider is not less than pintongs, two termination is fixed on the anchor bar body by the termination fastener device.Described centralizer can rotate on anchor bar body with body of rod spiral shell button or termination fastener device, move.

It is the tubaeform sleeve pipe that appearance is worn tapering that the utility model device is provided with anchor pad muzzle pipe according to geological conditions and user's needs, and external diameter cooperates with boring aperture, and inner surface cooperates with the centralizer external surface, can be installed in the concrete pedestal as required.

Anchor bar body described in the utility model can be that the hollow anchor bar body also can be solid anchor bar body.

When described anchor bar body is hollow tube, anchor bar body is with after the slip casting termination is connected, the cavity of anchor bar body is a Grouting Pipe, form the slip casting passage with the slurry outlet of slip casting termination, and form slip casting and exhaust passage with the extract duct in anchor pole aperture, guarantee that by centralizer anchor pole is placed in the middle, return slurry after advancing to starch by the hollow bolt body and fill with the boring gap, guarantee that slip casting is full.

When described anchor bar body is the solid body of rod, can form the slip casting passage with slurry outlet near the long tube the bolthole bottom is passed and arrived in one of binding on the body of rod from bearing plate as Grouting Pipe, and with the extract duct formation slip casting and the exhaust passage in anchor pole aperture.Guarantee that by centralizer anchor pole is placed in the middle, return slurry after advancing to starch by the hollow bolt body and fill with the boring gap, guarantee that slip casting is full.

But described anchor bar body not only comprises the hollow tube or the solid body of rod of the total length screw thread that any point is threaded, and comprising the only partial screw threads surface in the length of hollow bolt body two ends, remainder is the hollow tube or the solid body of rod on non-threaded surface.Anchor bar body can be established branch sleeve as required, with the anchor pole spreading.

This prestress anchor device forms outer anchor section, anchoring section and the free section of prestressed anchor after by grouting reinforcement and prestressing force.Outer anchor section is formed by bearing plate and one section anchor bar body of locking nut and outside; Anchoring section is formed by one section anchor bar body and grouting reinforcement body; Free section is formed by the anchor bar body of the one section free section of band casing bit.

Its mounting process method and principle are achieved in that when anchor rod body is hollow rod body

1. the usefulness auger is holed in stratum or rock stratum and is cleaned boring;

2. at the scene as required will be with adapter sleeve with the anchor bar body spreading, the slip casting termination is installed in the front;

3. will overlap effective two casing joints and body of rod spiral shell button at the scene is fixed on the free fragment position of pressing close to backing plate of anchor bar body;

4. as required, the oil filler point at free section sleeve pipe one end injects butter or other anticorrosion interleaving agent;

5. at correct position centralizer is installed, the method that the protruding key of ring also adopts body of rod spiral shell button groove, opening to match in the centralizer is fixed on the correct position on the body of rod;

6. will assemble prestress anchor device in place and insert in the boring, and in hell anchor pad muzzle pipe will be installed as required and be cast concrete pedestal, stack stretches out pedestal, passes bearing plate, can carry out slip casting;

7. after finishing above-mentioned steps, can carry out slip casting to anchor bar body.The cavity of anchor bar body is as the slip casting road, and injecting cement paste is full of boring gradually from bottom outflow and outside flowing that the slurry outlet of slip casting termination enters bolthole, and forms the grouting reinforcement body.When slurries stop slip casting, anchor pole installation when exhaust opening flows out.

8. after waiting injecting cement paste to reach the fixed length of time, bearing plate is installed on pedestal or the crag the closely connected pedestal external surface of bearing plate inner surface, nut is installed, by hollow jack or torque wrench it is carried out prestressing force and apply, locking nut, prestressed anchor installs.

Its mounting process and principle are achieved in that when anchor rod body is the solid body of rod

1, the usefulness auger is holed in stratum or rock stratum and is cleaned boring;

2, at the scene as required will be with adapter sleeve anchor pole spreading;

3, will overlap effective two casing joints and body of rod spiral shell button at the scene is fixed on the free fragment position of pressing close to backing plate of anchor bar body;

4, as required, the oil filler point at free section sleeve pipe one end injects butter or other anticorrosion interleaving agent;

5, at correct position centralizer is installed, the method that ring has protruding wedge also to adopt body of rod spiral shell button groove to match in the centralizer is fixed on the correct position on the body of rod;

6, Grouting Pipe, stack are installed: be bundled on the body of rod.Near long tube stretched at the bottom of the hole as Grouting Pipe with anchor pole, short tube passed pedestal as stack;

7, will assemble prestressed anchor in place and insert in the boring, install in hell as required that anchor pad muzzle pipe is cast the concrete pedestal Grouting Pipe, stack stretches out pedestal, passes bearing plate, can carry out slip casting;

8, finish above-mentioned steps after, can carry out slip casting to anchor bar body.Injecting cement paste enters foot of hole and outwards mobile through Grouting Pipe from slurry outlet, is full of boring gradually, forms the grouting reinforcement body.When slurries stop slip casting, anchor pole installation when exhaust opening flows out.

9, etc. after injecting cement paste reaches the fixed length of time, bearing plate is installed on pedestal or the crag the closely connected pedestal external surface of bearing plate inner surface, nut is installed, by hollow jack or torque wrench it is carried out prestressing force and apply, locking nut, prestressed anchor installs.

The prestressed anchor that the utility model proposes has following function and effect: the scene installs sleeve pipe, casing joint, the body of rod spiral shell button of free section of prestressed anchor, but makes the free section body of rod of prestressed anchor realize isolating or oiling isolation, anticorrosion by sleeve pipe; Carrying out once grouting after can installing anchor pole finishes; After injecting cement paste was fixed, one section body of rod of prestressed anchor and injecting cement paste formed anchoring section, and another section anchor bar body is isolated with injecting cement paste effectively by free section sleeve pipe spacer assembly, carries out prestressing force easily and applies; Centralizer makes anchor pole placed in the middle in long boring, makes the anchor pole spreading by adapter sleeve, and by slip casting, the exhaust passage realizes that slip casting is full, guarantees the supporting effect of prestressed anchor.

The utility model is applicable to the ground anchorage supporting in underground construction, foundation ditch, the slope project.In the geotechnical engineering supporting, particularly in the slope retaining very big development prospect is arranged, and alternative lower-prestressed anchor cable, high cost performance had.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model

Fig. 2 is the assembling schematic diagram of anchor pole free section sleeve pipe and termination fastener device among Fig. 1

Fig. 3 is the centralizer 5 assembling schematic perspective views among Fig. 1

Fig. 4 is another embodiment schematic perspective view of centralizer 5

Fig. 5 is that the utility model device of Fig. 1 is installed in the elevational schematic view in the stratum

Fig. 6 is the elevational schematic view of the another kind of embodiment of utility model device of Fig. 1

Digital code explanation in the above-mentioned accompanying drawing:

1-anchor rod body 2-sleeve pipe 3-casing joint 4-body of rod spiral shell button 5-centralizer

6-anchor pad muzzle pipe 7-bearing plate 8-locking nut 9-slip casting termination

10-branch sleeve 11-body of rod outer surface thread

20-stack 21-free section sleeve pipe oiling or steam vent 22-termination fastener device

30-is bundled in the Grouting Pipe on the solid anchor bar body

One end bore area of 31-casing joint (cooperating free section sleeve pipe outer end) 32-casing joint

Two protruding keys of other end endoporus (groove 42 and the opening 43 that cooperate body of rod spiral shell button 4

The inner surface screw thread 42-body of rod spiral shell button of 41-body of rod spiral shell button-the side groove

The connection female cone hole of one side opening 51-centralizer 5 of 43-body of rod spiral shell button

The limb of the olive-shaped slider of the limb termination 54-centralizer 5 of the olive-shaped slider of two protruding key 53-centralizers 5 in the 52-centralizer 5 connection female cone holes

The cavity of 90-hollow bolt body

91-slurry outlet 100-boring stratum or rock stratum 101-borehole wall and bolthole

The external surface of 110-grouting reinforcement body 200-concrete pedestal 201-concrete pedestal

The anchoring section of the free section 301-prestressed anchor of 300-prestressed anchor

The outer anchor section of 302-prestressed anchor

The specific embodiment

Shown in Fig. 1~6, a kind of prestress anchor device is made up of anchor bar body 1, bearing plate 7, locking nut 8, centralizer 5, free section casing bit 12, slip casting and exhaust passage etc.By outer anchor section 302, anchoring section 301 and the free section 300 that forms prestressed anchor behind grouting reinforcement and the prestressing force.Free section sleeve pipe 2 is set on the anchor bar body 1 and by two termination fastener device 2a its screw thread is fixed near on the anchor bar body 1 of bearing plate 7 one ends; Free section sleeve pipe 2 can with two termination fastener device 22 on anchor bar body 1, rotate move, mid portion separates formation isolation cavity with anchor bar body 1; Oil filler point 21 is arranged on it, can realize that oiling is isolated or non-oiling is isolated.

As shown in Figure 2, termination fastener device 22 is made up of casing joint 3 and body of rod spiral shell button 4; Casing joint 3 is that the ganoid external diameter of a joint equates the straight short tube of thin-walled, one end inner chamber straight circular hole such as is and cooperates with the external diameter of sleeve pipe 2, other end inner chamber is that inner small and outside big conical bore, its surperficial gradient matches with body of rod spiral shell button 4 outer poppet surfaces, the taper hole inner surface has the vertical protruding key 32 of two subtends, matches with groove 42, opening 43 on the body of rod spiral shell button 4.Body of rod spiral shell button 4 is smooth outer surface and the opening nut that is circular cone shape, and at the symmetry place fluted 42 over against opening 43; Its screw thread 41 cooperates with the external screw thread 11 of anchor bar body 1; Its opening 43 and groove 42 can match with the protruding key 32 in the casing joint 3.

Sleeve pipe 2 is one section equal diameters and ganoid straight tube, its internal diameter greater than the external diameter of anchor bar body 1, and can freely be through on anchor bar body 1 slides, its external diameter cooperates with an end internal diameter of casing joint 3; Location-appropriate in that two end surfaces of sleeve pipe 2 are not covered by joint 3 respectively has 21, one of an oil filler point or steam vents to be used for oiling, and another is used for exhaust.Sleeve pipe 2 is through on the anchor bar body 1, and cooperate two terminations to be fixed on the anchor bar body 1 with sleeve pipe 2 by casing joint 3 and body of rod spiral shell button 4, wherein an end is close to bearing plate 7 one sides and is fixed, sleeve pipe 2 does not contact to form with anchor bar body 1 isolates cavity, realize body of rod Free Transform effectively thereby this section anchor bar body and the external world are separated, form the free section of prestressed anchor.Body of rod spiral shell button 4 can form the appropriate location that opening 43 is stuck in it anchor bar body 1 easily by breaking into two with one's hands or opening.Sleeve pipe 2 closes tightly on anchor bar body 1 it by casing joint 3 cooperation that is connected with body of rod spiral shell button 4.Casing joint 3 matches and is connected with groove 42, the opening 43 of body of rod spiral shell button 4 through its conical surface 33, protruding key 32, and the threaded engagement of spiral shell button 4 and anchor bar body, makes sleeve pipe 2 can realize adjusting the function of position, locking and sealing on anchor bar body 1.

Free section sleeve pipe 2 is to be fixed on like this on the anchor bar body 1: at first a spiral shell button 4 is snapped on the anchor bar body 1, and casing joint 3 is inserted in anchor bar body 1, its taper hole 33 end faces should aim at spiral shell button 4, simultaneously protruding key 32 and opening 43 and groove 42 are matched merge to insert, chucking, form one group of termination mouth spare device.Spiral shell button 4 can drive joint 3 screw thread rotation on anchor bar body at this moment.Then, put on sleeve pipe 2, the one end inserts in joint 3 one ends, and cooperates with its inner surface 31.Once more, by the first step another group termination mouth spare is installed, its installation direction is relative with last group of termination mouth spare direction, and the other end with anchor bar body 1 inserts in joint 3 one ends of this group termination mouth spare subsequently, and cooperates with its inner surface 31.At last, rotate two groups of fasteners sleeve pipe 2 is fixed on the anchor bar body 1, form free section.

Oil filler point on the sleeve pipe 2 or steam vent 21 can make free section anchor bar body and outside better the isolation by filling pump perfusion anticorrisive agent such as lithium base butter etc. in the cavity between anchor bar body 1 and the sleeve pipe 2, improve antiseptic property and service behaviour.

Centralizer 5 can be the slider of wheel shape, also the slider of the olive shape that can be made up of a plurality of lobes.When adopting the slider embodiment of wheel shape, the female cone of connection hole 51 is arranged on the centralizer 5, the vertical protruding key 52 that two subtends are arranged in the taper hole matches with the male cone (strobilus masculinus) of a body of rod spiral shell button 4 and opening 43 and groove 42, is fixed on the anchor bar body 1 by spiral shell button 4.When the slider embodiment of the olive shape that adopts a plurality of lobes to form, limb 54 numbers of olive-shaped slider are not less than pintongs, two termination 53 is fixed on the anchor bar body 1 by termination fastener device 22.Described centralizer 5 can rotate on anchor bar body 1 with body of rod spiral shell button 4 or termination fastener device 22, move.On the free section 300 of anchor bar body 1 and anchoring section 301, a centralizer 5 is arranged at least respectively, guarantee slip casting and anchor pole work effect to realize preventing that anchor pole from moving in stratum installing hole meta offset.

The utility model device is provided with anchor pad muzzle pipe 6 according to geological conditions and user's needs and wears the tubaeform sleeve pipe of tapering for appearance, and external diameter cooperates with boring aperture, and inner surface cooperates with centralizer 5 external surfaces, can be installed in as required in the concrete pedestal 201.

Anchor bar body 1 can be hollow bolt body or solid anchor bar body.Two kinds of embodiment of its practical new device are installed in the stratum schematic diagram and see Fig. 4, shown in Figure 5.

When anchor bar body 1 was hollow tube, anchor bar body 1 was with after slip casting termination 9 is connected, and the cavity 90 of anchor bar body 1 forms the slip casting passages with the slurry outlet of slip casting termination 9 91, and formed slip casting and exhaust passages with the extract duct 20 in anchor pole aperture.Guarantee that by centralizer 5 anchor pole is placed in the middle, return slurry after advancing to starch by hollow bolt body 1 and fill with the boring gap, guarantee that slip casting is full.

When anchor bar body 1 is the solid body of rod, can be near the long tube the bolthole bottom is passed and arrived in one of binding on the body of rod 1 from bearing plate 7 as Grouting Pipe 30, and extract duct 20 is set in the anchor pole aperture.Like this, form the slip casting passage, and form slip casting and exhaust passage with extract duct 20 by Grouting Pipe 30 and slurry outlet 91 thereof.Guarantee that by centralizer 5 anchor pole is placed in the middle, return slurry after advancing to starch by hollow bolt body 1 and fill with the boring gap, guarantee that slip casting is full.

But anchor bar body 1 not only comprises the hollow tube or the solid body of rod of the total length screw thread that any point is threaded, and comprises the only partial screw threads surface in the length of hollow bolt body two ends, and remainder is the hollow tube and the solid body of rod on non-threaded surface.Anchor bar body 1 can be established branch sleeve 10 as required, with the anchor bar body spreading.

This prestress anchor device forms outer anchor section 302, anchoring section 301 and the free section 300 of prestressed anchor after by grouting reinforcement and prestressing force.Outer anchor section 302 is formed by bearing plate 7 and one section anchor bar body of locking nut 8 and outside; Anchoring section 301 is formed by one section anchor bar body and grouting reinforcement body 110; Free section 300 is formed by the anchor bar body of the one section free section of band casing bit 12.

Its mounting process method and principle are achieved in that when anchor rod body is hollow rod body

1. in boring stratum or rock stratum 100, get out borehole wall and bolthole 101 and cleaning boring with auger;

2. use adapter sleeve 10 with anchor bar body 1 spreading at the scene as required, slip casting termination 9 is installed in the front;

3. at the scene two termination fastener devices 22 of sleeve pipe 2 usefulness are fixed on the free fragment position of pressing close to backing plate 7 of anchor bar body 1;

4. as required, the oil filler point stack 21 at free section sleeve pipe one end injects butter or other anticorrosion interleaving agent;

5. at correct position centralizer 5 is installed, the method that the protruding key 52 of ring also adopts body of rod spiral shell button 4 grooves 42, opening 43 to match in the centralizer 5 is fixed on the correct position on the body of rod;

6. will assemble prestress anchor device in place and insert in the boring, and in hell anchor pad muzzle pipe 6 will be installed as required and be cast concrete pedestal 200, stack 20 stretches out pedestal, passes bearing plate 7, can carry out slip casting;

7. after finishing above-mentioned steps, can carry out slip casting to anchor bar body.The cavity 90 of anchor bar body 1 is as the slip casting road, and pipeline 20 is as exhaust duct, and slurries are full of boring gradually from bottom outflow and outside flowing that the slurry outlet 91 of slip casting termination 9 enters bolthole 101, and form grouting reinforcement body 110.When slurries stop slip casting, anchor pole installation when exhaust opening 20 flows out.

8. after waiting injecting cement paste to reach for the 110 fixed length of times, bearing plate is installed on pedestal or the crag the closely connected pedestal external surface 201 of bearing plate inner surface, nut 8 is installed, by hollow jack or torque wrench it is carried out prestressing force and apply, locking nut, prestressed anchor installs.

Its mounting process and principle are achieved in that when anchor rod body is the solid body of rod

1. in boring stratum or rock stratum 100, get out borehole wall and bolthole 101 and cleaning boring with auger;

2. use adapter sleeve 10 at the scene as required with anchor bar body 1 spreading;

3. at the scene two termination fastener devices 22 of sleeve pipe 2 usefulness are fixed on the free fragment position of pressing close to backing plate 7 of anchor bar body 1;

4. as required, the oil filler point 21 at free section sleeve pipe one end injects butter or other anticorrosion interleaving agent;

5. at correct position centralizer is installed, the method that ring has protruding wedge also to adopt body of rod spiral shell button groove to match in the centralizer is fixed on the correct position on the body of rod;

6. Grouting Pipe 30, stack 20 are installed: be bundled on the body of rod.Long tube is made Grouting Pipe 30 near stretching at the bottom of the hole with anchor pole, and short tube passes pedestal as stack 20;

7. will assemble prestressed anchor in place and insert in the boring 101, and in hell anchor pad muzzle pipe 6 will be installed as required and be cast concrete pedestal 200, Grouting Pipe 30, stack 20 stretch out pedestal, pass bearing plate, can carry out slip casting;

8. after finishing above-mentioned steps, can carry out slip casting to anchor bar body.Grouting Pipe 30 is as the slip casting road, and stack 20 is as exhaust duct, and slurries enter boring 101 bottoms and outwards mobile from Grouting Pipe 30 through slurry outlet 91, are full of boring gradually, form grouting reinforcement body 110.When slurries stop slip casting, anchor pole installation when stack 20 flows out.

9. after waiting injecting cement paste to reach for the 110 fixed length of times, bearing plate is installed on pedestal or the crag the closely connected pedestal external surface 201 of bearing plate inner surface, nut 8 is installed, by hollow jack or torque wrench it is carried out prestressing force and apply, locking nut, prestressed anchor installs.

Claims (9)

1. prestress anchor device, comprise anchor bar body (1), bearing plate (7), locking nut (8), centralizer (5), free section sleeve pipe (2), termination fastener device (22), slip casting and exhaust passage, anchor bar body is divided into outer anchor section (302), free section (300) and anchoring section (301), it is characterized in that: described anchor bar body (1) is for hollow or solid, and free section sleeve pipe (2) is set on anchor bar body (1) and upward and by two termination fastener device (22) its screw thread is fixed near on the anchor bar body (1) of bearing plate (7) one ends; Described free section sleeve pipe (2) can go up at anchor bar body (1) that rotation is moved with two termination fastener device (22), mid portion separates with anchor bar body (1) and forms the isolation cavity.
2. according to claims 1 described prestress anchor device, it is characterized in that: when described anchor bar body (1) is solid, near the Grouting Pipe (30) the bolthole bottom is passed and arrived in one of binding on the body of rod from bearing plate (7).
3. prestress anchor device according to claim 1 is characterized in that: described termination fastener device (22) is made up of casing joint (3) and body of rod spiral shell button (4); Described casing joint (3) is that the ganoid external diameter of a joint equates the straight short tube of thin-walled, one end inner chamber straight circular hole such as is and cooperates with the external diameter of sleeve pipe (2), other end endoporus is that inner small and outside big conical bore, its surperficial gradient matches with the outer poppet surface of body of rod spiral shell button (4), there is the vertical protruding key (32) of two subtends on the taper hole surface, matches with groove (42), opening (43) on the body of rod spiral shell button (4); Described body of rod spiral shell button (4) is for smooth outer surface and be the opening nut of circular cone shape, and over against the symmetry place of opening (43) fluted (42); Its screw thread (41) cooperates with the external screw thread (11) of anchor bar body (1); Its opening (43) and groove (42) can match with the protruding key (32) in the casing joint (3).
4. prestress anchor device according to claim 3 is characterized in that: described body of rod spiral shell button (4) is provided with opening (43), and opening (43) may be stuck in the appropriate location of anchor bar body (1).
5. prestress anchor device according to claim 1, it is characterized in that: described free section sleeve pipe (2) is one section equal diameters and ganoid straight tube, its internal diameter greater than the external diameter of anchor bar body (1), and can freely be through anchor bar body (1) and go up and slide, its external diameter cooperates with an end internal diameter of casing joint (3).
6. prestress anchor device according to claim 5 is characterized in that: free section sleeve pipe (2) is provided with oil filler point or steam vent (21).
7. according to claims 1 described prestress anchor device, it is characterized in that: on the free section (300) of anchor bar body (1) and anchoring section (301), a centralizer (5) is arranged at least respectively.
8. prestress anchor device according to claim 7, it is characterized in that: described centralizer (5) adopts the slider of wheel shape, the female cone hole (51) of connection is arranged on the centralizer (5), the vertical protruding key (52) that two subtends are arranged in the taper hole, match with the male cone (strobilus masculinus) of a body of rod spiral shell button (4) and opening (43) and groove (42), be fixed on the anchor bar body (1) by spiral shell button (4).
9. prestress anchor device according to claim 7, it is characterized in that: the slider of the olive shape that described centralizer (5) is made up of a plurality of lobes, the number of the limb of olive-shaped slider (54) is not less than pintongs, two termination (53) are fixed in anchor bar body (1) by termination fastener device (22), and centralizer (5) can be gone up rotation, move at anchor bar body (1) with body of rod spiral shell button (4) or termination fastener device (22).
CN 200620104356 2006-06-05 2006-06-05 Prestressed anchor arm device CN2911011Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100453743C (en) * 2006-06-05 2009-01-21 吴德兴 Prestress anchor device
CN102400699A (en) * 2011-11-18 2012-04-04 山东科技大学 Bamboo-joint type high-strength anchor rod
CN102900081A (en) * 2012-11-11 2013-01-30 青岛理工大学 Nonmetal anti-floating anchor rod and anchoring method thereof
CN103290843A (en) * 2013-06-04 2013-09-11 北京工业大学 Pre-stressed pressure-type anti-floating anchor with spiral stirrup
CN104164875A (en) * 2014-08-11 2014-11-26 华侨大学 Tension and compression combination-type anchor rod
CN104763454A (en) * 2015-04-08 2015-07-08 成都理工大学 Built-in type full-length anticorrosion anchor rod
CN106049493A (en) * 2016-07-28 2016-10-26 广东省建科建筑设计院有限公司 Anti-corrosion prefabricated grouting anchor rod for highly corrosive environment
CN110486070A (en) * 2019-09-19 2019-11-22 武威 A kind of constructing structure of the prestressed anchor of tunnel or Culvert engineering

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100453743C (en) * 2006-06-05 2009-01-21 吴德兴 Prestress anchor device
CN102400699A (en) * 2011-11-18 2012-04-04 山东科技大学 Bamboo-joint type high-strength anchor rod
CN102900081A (en) * 2012-11-11 2013-01-30 青岛理工大学 Nonmetal anti-floating anchor rod and anchoring method thereof
CN103290843A (en) * 2013-06-04 2013-09-11 北京工业大学 Pre-stressed pressure-type anti-floating anchor with spiral stirrup
CN104164875A (en) * 2014-08-11 2014-11-26 华侨大学 Tension and compression combination-type anchor rod
CN104763454A (en) * 2015-04-08 2015-07-08 成都理工大学 Built-in type full-length anticorrosion anchor rod
CN106049493A (en) * 2016-07-28 2016-10-26 广东省建科建筑设计院有限公司 Anti-corrosion prefabricated grouting anchor rod for highly corrosive environment
CN110486070A (en) * 2019-09-19 2019-11-22 武威 A kind of constructing structure of the prestressed anchor of tunnel or Culvert engineering

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