CN2561935Y - Sectional hollow slip anchor rod - Google Patents

Sectional hollow slip anchor rod Download PDF

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Publication number
CN2561935Y
CN2561935Y CN 02265041 CN02265041U CN2561935Y CN 2561935 Y CN2561935 Y CN 2561935Y CN 02265041 CN02265041 CN 02265041 CN 02265041 U CN02265041 U CN 02265041U CN 2561935 Y CN2561935 Y CN 2561935Y
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CN
China
Prior art keywords
rod
hollow
anchor
solid
duct
Prior art date
Application number
CN 02265041
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Chinese (zh)
Inventor
吴德兴
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吴德兴
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Priority to CN 02265041 priority Critical patent/CN2561935Y/en
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Publication of CN2561935Y publication Critical patent/CN2561935Y/en

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Abstract

The utility model provides a sectional-type hollow grouting anchor rod, which comprises two sections of a front end solid rod body and a rear end hollow rod body, the hollow rod body is combined with the solid rod body through a connecting sleeve, the connecting sleeve is provided with a grout resistance utensil, and the hollow rod body is provided with a plurality of centralizers; the connecting par of the connecting sleeve inner hole and the hollow rod body cavity with a lateral pore canal; a support floor plate, a nut, and a washer are matched with the hollow rod body end part; the support floor plate is arranged with a pore canal, and a section of pipe line penetrates from the pore canal of the support floor plate. The anchor rod not only can be suitable for good rock stratum, but also can be used for fast support for conditions of weak and broken rock stratum, thereby ensuring plump grout injection and making the uniform anchor rod protective layer, so as to be suitable for temporary or permanent support engineering.

Description

A kind of segmented hollow grouting anchor

Technical field

The utility model belongs to geotechnical engineering anchoring support technical field.The utility model relates to a kind of segmented hollow grouting anchor, is applicable to the earth formation supporting of aspects such as underground construction, mining engineering, foundation ditch and 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 anchor pole injecting cement paste on every side and the stratum with stratum consolidation, to improve the globality on 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 multiple bolt support type is proposed and the anchoring technology that adapts with anchor pole to adapt to the different stratum and the needs of different condition.

At present the anchor pole that adopts is with regard to type, can be divided into reinforcing bar or steel pipe by the rigidity of anchor bar body and make the bar reinforcement anchor pole (Bar anchor) of the body of rod and make Anchor cable-rod (strand anchor) the two big classes of the body of rod with flexible high strength steel strand.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 the bar reinforcement anchor-holding force of anchor bolt generally uses less than 500KN, and the machinery that is adopted is simple, easy construction, so be to use maximum anchor poles 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.

The classification of bar reinforcement anchor pole can be divided into following several substantially:

1) can be divided into grouted anchor bar and non-grouted anchor bar by the anchoring type.2) can be divided into non-prestressed anchor pole and prestressed anchor by the prestressing force mode.3) can be divided into mechanical. points anchor type (end anchorage formula) and full bond-anchorage type by the prestress anchoraging mode.4) can divide non-binding type prestressed anchor and binding type prestressed anchor by the free section of prestressed anchor.5) can be divided into solid anchor pole and hollow (hollow) anchor pole by body of rod shape.6) can be divided into automatic anchor pole and non-automatic anchor pole by the mode of creeping into.

In the bar reinforcement anchor pole, China's National Standard anchor pole concrete-spraying technology standard " (GB50086-2001), " highway tunnel design specifications " (TJJ026-90), " Design of Railway Tunnel standard " (TB10003-99), " anchoring and slurry injection technique handbook (China Electric Power Publishing House, publish in September, 1999) etc. relate to multiple bar reinforcement anchor pole type in the document, below make a presentation roughly:

1. bar reinforcement grouting rock bolt: adopt indented bars to make the body of rod, its construction technology be earlier in the stratum boring back inject cement mortar, in band slurry duct, insert reinforcing bar then, reinforcing bar, mortar are combined with the stratum.Its job practices belongs to grouting back anchoring earlier, and its mechanics principle is after mortar solidifies, and the body of rod bears pulling force restriction stratum deformation with the stratum distortion.Belong to non-prestressed, the grouted anchor bar that bonds entirely.This anchor bolt construction is easy.Its shortcoming is: 1) the slurry plumpness is difficult to guarantee, and has off-set phenomenon when inserting reinforcing bar, and thickness of protection tier is difficult for evenly, and anchored force is little.Destroy so make corrosion of steel bar.2) simultaneously because of not implementing prestressing force, injecting cement paste ftractures with the reinforcing bar distortion, makes aqueous vapor directly invade reinforcing bar, influences application life.3) be not suitable for broken formation.4) because of bolt support power slowly forms the hard back of knot at mortar, so inapplicable need form the occasion of supporting power rapidly.

2. high-early (strength) cement powder stick anchor pole and the solid anchor pole of resin explosive roll anchoring: belong to early strong anchoring rod, adopt indented bars to make the body of rod.But its basic construction technology is to insert high-early (strength) cement powder stick resin explosive roll in the duct bottom of having bored in the stratum or the length range, inserts the solid reinforced anchor bolt of total length then, treats that powder stick sclerosis back forms anchored force.Its job practices also belongs to the type of grouting back anchoring earlier.Though this method is improved the solid anchor pole of ordinary mortar, applicable stratum expanded range, and can form supporting power rapidly, anchoring slurry plumpness and thickness of protection tier still be cannot say for sure to demonstrate,prove because of structure aspect problem, influence the reliability of anchor bar body.

3. water swelling formula anchor pole and pipe-seam type anchor rod: utilize the body of rod and hole wall and rub and form supporting power.Water swelling formula anchor pole is to adopt the special steel pipe of band groove to make anchor bar body, and body of rod sealing two ends forms cavity, and wherein the tail end head is established the aperture that can inject water under high pressure.Its job practices is to insert anchor bar body in earth-boring, behind the anchor pole installation in position, injects water under high pressure with high-pressure hydraulic pump by water filling port, makes the steel pipe expandable cavity of matrix section, and is closely connected with the boring wall, by the closely connected instant supporting power that forms of friction that produces.

Pipe-seam type anchor rod is to adopt the steel pipe that vertical total length is cracked to make the body of rod, and its front end tip is less than boring aperture, and its job practices is with forcing press the body of rod to be pressed in the boring, makes the body of rod closely connected with the boring wall, produces the instant supporting power that forms of friction.

Water swelling formula anchor pole and pipe-seam type anchor rod generally can not prestressing force, belong to the non-grouted anchor bar of friction-type, generally are only applicable in temporary lining and the good rock stratum.

4. expansion type rock bolt: utilize the shell power that rises of anchor head to form the mechanical. points anchor-hold.Anchor bar body is generally solid reinforcing bar, have not slip casting and the full bonding of slip casting and can prestressed polytype.Its job practices is that the anchor pole that front end is equipped with the shell anchor head that rises is inserted in the boring, behind the installation in position, rotates with turning tool the shell that rises is fully opened, and with closely connected with the boring wall, produces the instant supporting power that forms of friction.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.And the anti-corrosion protection to the shell anchor head that rises is difficult, is used for temporary lining more.

5. hollow automatic anchor pole: disclose a kind of drilling type grouted anchor bar as Chinese patent ZL95202848.4, made drilling rod by hollow lever and add drill bit and realize drilling rod and anchor pole unification, slip casting again after creeping into.This technical scheme lays particular emphasis on grouting support weak and broken rock, but its shortcoming is an injecting cement paste anchoring overlong time, because of technological reason can not form anchored force rapidly, so the inapplicable stratum that needs quick supporting.

In sum, all there are shortcoming separately in above-mentioned anchor pole type and bolt support job practices thereof, are only applicable to certain occasion.

Summary of the invention

The utility model provides a kind of segmented hollow grouting anchor, and this anchor pole can satisfy the requirement of above-mentioned anchor rod support method, and fore-end is solid, has good intensity, and is with low cost again; Aft section hollow has into slurry or degassing function concurrently, can adapt to the interim or permanent support engineering of various rock stratum.

A kind of segmented hollow grouting anchor is made up of for two sections the solid body of rod of front end and rear portion hollow lever, and hollow lever combines by branch sleeve with the solid body of rod, has slurry-blocking device on the branch sleeve, has several centralizers on the hollow lever; Branch sleeve endoporus and hollow lever cavity connecting place are provided with the side direction duct; Bearing plate, nut, packing ring cooperate with the hollow lever end; Described bearing plate is provided with the duct, and a segment pipe penetrates from the duct of bearing plate.

The end endoporus that described branch sleeve is connected with the solid body of rod can be communicated with also and can not be communicated with the side direction duct.

The described solid body of rod adopts solid notched bars, and its body of rod bottom tail end tangent plane is a scarf.Described slurry-blocking device is the annulus that a band trumpet type retaining is pulled, and in the afterbody that retaining is pulled was made up of a plurality of limbs, the length of baffle plate should extend beyond the position in branch sleeve duct.

Described centralizer is the cylinder that appearance is worn the positioning tooth sheet, and the centralizer inner surface matches with hollow lever.

Described backing plate is the butterfly backing plate, and described packing ring is the hemispherical packing ring, and the contact surface of bearing plate and packing ring is the sphere that is complementary.

Segmented hollow grouting anchor of the present utility model combines by hollow lever two sections with the solid body of rod, the solid body of rod in boring and early by force anchoring body realize quick anchoring power jointly.Make anchoring section with the solid body of rod, hollow lever is made free section, and by backing plate, nut and packing ring are made Lock Part, can realize prestressing force, realize quick supporting power.By hollow lever and the special extract duct and the side direction duct of hollow lever and branch sleeve, can realize grouting behind shaft or drift lining, make injecting cement paste full evenly.Centralizer, slurry-blocking device and stop grouting plug can guarantee the slip casting effect and the slip casting topping of the body of rod.Adopt segmented hollow grouting anchor of the present utility model, be applied to the earth formation supporting of aspects such as underground construction, mining engineering, foundation ditch and slope project, can adapt to the interim or permanent support engineering of various rock stratum.

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The specific embodiment

As Fig. 1, anchor pole of the present utility model is made up of for 6 two sections with the rear end hollow lever the solid body of rod 2 of front end, and hollow lever 6 combines by branch sleeve 4 with the solid body of rod 2, has slurry-blocking device 3 on the branch sleeve 4, has several centralizers 5 on the hollow lever 6; Branch sleeve 4 is provided with side direction duct 14 with hollow lever 6 cavitys 18 connecting places; Bearing plate 10, nut 8, packing ring 9 cooperate with the end of hollow lever 6; Described bearing plate 10 is provided with duct 13, and pipeline 7 passes from duct 13.

As Fig. 2, the anchor rod support method that the utility model adopts: with auger in the stratum, hole 1 and cleaning hole 1.At the scene hollow lever 6, centralizer 5, branch sleeve 4, the solid body of rod 2 and slurry-blocking device 3 are assembled, form anchor bar body.The early strong anchoring agent of packing in boring 1 deep.Charge weight is to be as the criterion the actual anchoring spatial volume of the boring volume between the solid body of rod 2 and the slurry-blocking device 3 after the solid body of rod 2 inserts.

The above-mentioned anchor bar body that assembles is made the anchor bar body installation in position with rig to rotate means such as impact, and the solid body of rod 2 fully stirs early strong anchoring agent, pushes and fill in boring 1 closely knit, the early strong anchoring body 15 of formation.After treating that early strong anchoring body 15 knots are hard, reaching desirable strength, mounting support backing plate 10, packing ring 9, nut 8 and pipeline 7 on bearing surface 12, bearing plate 10 closely connected bearing surfaces 12.

During as needs, also want at boring 1 oral area stop grouting plug 30 to be installed earlier.When on the anchor pole when installing (when foot of hole is higher than the aperture), for preventing spillage, stop grouting plug 30 is set at boring 1 oral area.Deeply hole 1 length of pipeline 7 surpasses stop grouting plug 30, in order to slip casting.(when hang down in the relative aperture of foot of hole) can not establish stop grouting plug 30 when anchor pole is installed downwards.Stop grouting plug 30 can be early strong slurry or is solid element.

When anchor pole being carried out prestressing force as needs, available hydraulic hollow plunger jack pair hollow lever 6 stretch-draw prestressing forces, and with nut 8 locking prestressing force loads; Perhaps directly use moment of torsion wrench fastening nut 8, realize prestressing force.This anchor pole is during as prestressed anchor, and hollow lever 6 be free section to length between the side direction duct 14 of branch sleeve 4, and the solid body of rod 2 is an anchoring section to the length between the slurry-blocking device 3.

After finishing above-mentioned steps, to 6 sections slip castings of hollow lever.Injecting paste material adopts cement paste (water/binder ratio was at 1: 0.3~1: 0.5).

The anchor pole installation site has installs two kinds of situations up and down.When anchor pole was installed downwards, the cavity 18 of hollow lever 6 was as the slip casting road, was installed in pipeline 7 on the backing plate 10 as exhaust duct.Cavity end slip casting from hollow lever 6, slurries 14 flow out and enter boring from side direction duct that branch sleeve 4 links to each other with hollow lever cavity 18 by hollow lever 6, and are full of boring gradually and form injecting cement paste 11, when slurries when pipeline 7 flows out, stop slip casting, finish anchor pole and install.

When anchor pole was upwards installed, pipeline 7 was the slip casting road, and the cavity 18 of hollow lever 6 is made exhaust duct.During slip casting, the full gradually injecting cement paste 11 that forms of slurries, and from branch sleeve 4 and side direction duct 14 that hollow lever cavity 18 links to each other, enter in the cavity 18 of hollow lever 6.When slurries flow out from the end of hollow lever, stop slip casting, finish anchor pole and install.

As Fig. 3, hex nut 8 and hollow lever 6 cooperate with screw threads for fastening, and bearing plate 10 is a butterfly, contacts with the sphere that is complementary with the contact surface 16 of packing ring 9, the load that nut bears is delivered on the bearing surface 12 by the contact surface 16 between hemispherical packing ring 9 and the butterfly bearing plate 10.Pipeline 7 penetrates from the backing plate 10 that has hole 13 in the boring 1.

As Fig. 4, Fig. 5, at least one centralizer 5 is installed on hollow lever 6.Centralizer 5 inner surfaces 20 cooperate with hollow lever 6, can adopt to be threaded, and also can adopt other fitting method.Appearance is worn positioning tooth sheet 21.The effect of centralizer 5 is to guarantee that anchor bar body has enough slip casting toppings, prevents the anchor pole corrosion.

A kind of situation when Fig. 6 is anchor bar body axis and bearing surface 12 non-perpendicular installations.By the contact position of adjustment hemispherical packing ring 9, realize that load is delivered on the bearing surface 12 effectively with the contact surface 16 of butterfly base plate 10.Nut 8 also can be made a whole accessory with packing ring 9, and threaded engagement between the hollow lever 6.

Hollow lever 6 not only comprises total length thread surface 19, the total length screw-thread steel body that can any point be threaded; And comprise the only partial screw threads surface in the length of hollow lever two ends, with as with being threaded of the endoporus 24 of the threaded engagement of nut 8 and branch sleeve 4, and the middle part is the steel pipe body of rod of light face.

As Fig. 7, shown in Figure 8, branch sleeve 4 two ends have endoporus 24 that can be connected with hollow lever 6 and the endoporus 25 that can be connected with the solid body of rod 2.Branch sleeve 4 middle part sidewalls are provided with side direction duct 14, are used for exhaust or slip casting.Side direction duct 14 is connected with endoporus 24, and can be communicated with and can also not be communicated with endoporus 15.Hollow lever 6 adopts with branch sleeve 4 and is threaded, and the solid body of rod 2 adopts screw thread or sleeve extruding to be connected with branch sleeve 4.

The solid body of rod 2 adopts solid notched bars, and its body of rod bottom tail end tangent plane 17 is a scarf, the die-cut effect of tip when guaranteeing that anchor pole is sent into.

As Fig. 9, Figure 10, slurry-blocking device 3 is enclosed within on the branch sleeve 4.The inner surface 23 of slurry-blocking device 3 cooperates with the branch sleeve intimate; Trumpet type baffle plate 22 afterbodys of slurry-blocking device 3 are that a plurality of limbs 26 are formed.The effect of slurry-blocking device 3 is to prevent that the solid body of rod 2 from impacting when entering, and its anchoring agent is flowed and obstruction duct 14 to hollow lever 6 directions, so that influences the grouting behind shaft or drift lining effect of 6 sections of hollow levers.Limb 26 can make baffle plate 22 distortion and be beneficial to exhaust in boring 1, the length of baffle plate 22 should extend beyond 14 positions, side direction duct of branch sleeve 4.

Claims (6)

1. a segmented hollow grouting anchor is made up of for (2) two sections the hollow lever (6) and the solid body of rod, and it is characterized in that: hollow lever (6) combines by branch sleeve (4) with the solid body of rod (2), has slurry-blocking device (3) on the branch sleeve (4); Have several centralizers (5) on the hollow lever (6); Branch sleeve (4) endoporus and hollow lever (6) cavity connecting place are provided with side direction duct (14); Bearing plate (10), nut (8), packing ring (9) cooperate with hollow lever (6) end; Described bearing plate (10) is provided with duct (13), and a segment pipe (7) penetrates from the duct (13) of bearing plate (10).
2. a kind of segmented hollow grouting anchor according to claim 1 is characterized in that: the end endoporus (25) that described branch sleeve (4) is connected with the solid body of rod (2) can not be communicated with side direction duct (14).
3. a kind of segmented hollow grouting anchor according to claim 1 is characterized in that: the described solid body of rod (2) adopts solid notched bars, and its body of rod bottom tail end tangent plane (17) is a scarf.
4. a kind of segmented hollow grouting anchor according to claim 1, it is characterized in that: described slurry-blocking device (3) is that a band trumpet type retaining is pulled the annulus of (22), keep off the afterbody of pulling (22) and be made up of a plurality of limbs (26), the length of baffle plate (22) should extend beyond the position in branch sleeve (4) duct (14).
5. a kind of segmented hollow grouting anchor according to claim 3 is characterized in that: described centralizer (5) is worn the cylinder of positioning tooth (21) for appearance, and centralizer (5) inner surface matches with hollow lever (6).
6. a kind of segmented hollow grouting anchor according to claim 1, it is characterized in that: described bearing plate (10) is the butterfly backing plate, described packing ring (9) is the hemispherical packing ring, and bearing plate (10) is the sphere that is complementary with the contact surface (16) of packing ring (9).
CN 02265041 2002-06-24 2002-06-24 Sectional hollow slip anchor rod CN2561935Y (en)

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CN 02265041 CN2561935Y (en) 2002-06-24 2002-06-24 Sectional hollow slip anchor rod

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505687A (en) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof
CN103195061A (en) * 2013-04-07 2013-07-10 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN105041354A (en) * 2015-08-24 2015-11-11 中国矿业大学(北京) Anchoring device and supporting method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505687A (en) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof
CN102505687B (en) * 2011-12-13 2014-08-06 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof
CN103195061A (en) * 2013-04-07 2013-07-10 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN103195061B (en) * 2013-04-07 2015-05-06 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN105041354A (en) * 2015-08-24 2015-11-11 中国矿业大学(北京) Anchoring device and supporting method thereof

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AV01 Patent right actively abandoned

Effective date of abandoning: 20050504

C25 Abandonment of patent right or utility model to avoid double patenting