CN110397035B - Recoverable anchor rope - Google Patents
Recoverable anchor rope Download PDFInfo
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- CN110397035B CN110397035B CN201910767117.5A CN201910767117A CN110397035B CN 110397035 B CN110397035 B CN 110397035B CN 201910767117 A CN201910767117 A CN 201910767117A CN 110397035 B CN110397035 B CN 110397035B
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- bearing plate
- sleeve
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims description 73
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000001125 extrusion Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000000565 sealant Substances 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 description 25
- 238000003825 pressing Methods 0.000 description 21
- 238000004064 recycling Methods 0.000 description 15
- 238000010276 construction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of anchor cables, and discloses a recyclable anchor cable, which comprises: a carrier module; the supporting body module comprises a guide housing with an opening at one end, a supporting plate, a pushing mechanism and an anchor device arranged in the guide housing; the bearing plate is connected with the opening end of the guide housing to form a closed space; the anchor device is formed by splicing a plurality of parts, at least one taper hole is formed by splicing the parts, a fixing sleeve for fixing the parts is sleeved on the outer side of the anchor device, and the outer wall of the fixing sleeve is connected with the inner wall of the guide housing; one end of at least one working cable sequentially passes through the bearing plate and the taper hole from the outer side of the bearing plate, and a first clamping piece is arranged between the working cable and the taper hole; the pushing mechanism is used for pushing the fixing sleeve to be separated from the anchor device from the external force of the bearing plate so as to release the fixing of a plurality of parts of the anchor device. According to the recyclable anchor cable, the constraint on the anchor device is removed through the movement of the fixing sleeve, so that the working cable is easily recycled, and the unlocking speed is high.
Description
Technical Field
The invention relates to the technical field of anchor cables, in particular to a recyclable anchor cable.
Background
The prestressed anchor cable is mainly used for supporting an underground foundation pit, and is used as a temporary supporting measure, the permanent anchor cable is used for causing a great amount of waste of steel strands, and meanwhile, building rubbish is formed to encroach on an underground space, so that hidden danger is brought to the development and utilization of the urban underground space. The recyclable anchor cable can solve the troublesome problems, so the recyclable anchor cable is a development trend in the field of temporary support in the future.
As early as the 90 s of the 20 th century, research on recoverable anchor cable technology aiming at reducing underground pollution is carried out in China. At present, anchor cable enterprises and corresponding technical patents exist in China, the forms of the anchor cable enterprises and the corresponding technical patents are basically hot melt type, drawing type and mechanical unlocking type, but certain defects exist in practical application, such as: the carrying body is large in size, difficult to recover due to incomplete unlocking, difficult to install and construct and the like.
Chinese patent CN2613519Y discloses a recoverable anchor device capable of recovering anchor cable in civil engineering, its structure comprises parts of outer cylinder, middle cylinder, inner rod, cross pin, pin cover and backing plate. The recycling anchorage has the advantages of complex structure installation, long appearance, large volume, large harm of recycling residual bearing bodies to remain underground, slow recycling unlocking and complex efficacy, and the like, and is not suitable for the construction requirements of high efficiency, economy and environmental protection.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a recyclable anchor cable, which is used for solving or partially solving the problems of slow recycling and unlocking complicated effects of the traditional recycling anchor, and inapplicability to the construction requirements of high efficiency, economy and environmental protection.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a recoverable anchor cable, comprising: a carrier module; the supporting body module comprises a guide housing with an opening at one end, a bearing plate, a pushing mechanism and an anchor device arranged in the guide housing; the bearing plate is connected with the opening end of the guide housing to form a closed space; the anchor device is formed by splicing a plurality of parts, at least one taper hole is formed by splicing the parts, a fixing sleeve for fixing the parts is sleeved on the outer side of the anchor device, and the outer wall of the fixing sleeve is connected with the inner wall of the guide housing; one end of at least one working cable sequentially passes through the bearing plate and the taper hole from the outer side of the bearing plate, and a first clamping piece is arranged between the working cable and the taper hole; the pushing mechanism is connected with the fixing sleeve in the guide housing and extends to the outer side of the bearing plate, and is used for pushing the fixing sleeve to be separated from the anchor device from the outer force application of the bearing plate so as to release the fixing of a plurality of parts of the anchor device.
On the basis of the scheme, the anchor comprises a tooth-shaped anchor and an anchor wedge; the edge of the tooth-shaped anchorage device is tooth-shaped, the anchorage device wedge block is arranged between any two adjacent teeth, the anchorage device wedge block and the tooth-shaped anchorage device are connected in a spliced mode along the circumferential direction, and the taper hole is formed between the anchorage device wedge block and the tooth-shaped anchorage device.
On the basis of the scheme, the pushing mechanism comprises a pushing plate, a pushing sleeve, a recovery cable and an extrusion sleeve; one end of the pushing sleeve is connected with one end of the fixing sleeve, which is away from the bearing plate, the other end of the pushing sleeve is connected with the pushing plate, one end of the recovery cable sequentially passes through the bearing plate, the anchor device and the pushing plate from the outer side of the bearing plate, and one side of the pushing plate, which is away from the bearing plate, is sleeved with the recovery cable.
On the basis of the scheme, the recovery cable respectively passes through the central parts of the bearing plate, the anchor device and the pushing plate.
On the basis of the scheme, the parts of the working cable and the recovery cable, which are positioned on the outer side of the bearing plate, are respectively sleeved with a protective sleeve, and one end of the protective sleeve is in sealing connection with the outer side of the bearing plate.
On the basis of the scheme, the sheath pipe is connected with the bearing plate through the pressing pipe, the diameter of the first end of the pressing pipe is smaller than that of the second end, the first end of the pressing pipe penetrates through the bearing plate from the outer side of the bearing plate and is in threaded connection with the bearing plate, the second end of the pressing pipe is connected with the outer side of the bearing plate, a sealing gasket is arranged between the second end of the pressing pipe and the sealing gasket, the first end of the pressing pipe is connected with the retaining nut on the inner side of the bearing plate, and one end of the sheath pipe is inserted into the pressing pipe from the second end of the pressing pipe.
On the basis of the scheme, the bearing body module further comprises a supporting block arranged inside the guide housing; one end of the supporting block is connected with the inner side of the bearing plate, the other end of the supporting block is connected with the anchor, the section size of the supporting block is smaller than or equal to that of the anchor, and the supporting block is provided with a through hole which is matched with the working rope and the recovery rope.
On the basis of the scheme, a plurality of first through grooves are formed in the outer wall of the anchor device at intervals along the circumferential direction, and the first through grooves are formed in the axial direction of the anchor device; a second through groove is axially formed in the inner wall of the fixed sleeve at a position corresponding to the first through groove, and a steel needle is arranged between the first through groove and the second through groove; and the two ends of the first through groove and one end of the second through groove, which is close to the bearing plate, are respectively provided with a stop block.
On the basis of the scheme, the method further comprises the following steps: an anchor block assembly; the anchor seat assembly comprises an anchor backing plate and a tensioning anchor ring, the other ends of the working rope and the recovery rope respectively penetrate through the anchor backing plate and the tensioning anchor ring in sequence, and a second clamping piece is arranged between the working rope and the tensioning anchor ring.
On the basis of the scheme, the diameter of the outer side of the bearing plate is larger than that of the inner side, the opening end of the guide housing is in threaded connection with the inner side of the bearing plate, and sealing glue is arranged at the joint.
(III) beneficial effects
According to the recyclable anchor cable, the anchor device is of the splicing structure, and the anchor device is restrained through the fixing sleeve, so that the working cable can be firmly anchored and fixed, the restraint on the anchor device can be relieved through the movement of the fixing sleeve, and further the working cable can be easily recycled; meanwhile, the unlocking speed is high, the working rope is light and labor-saving to pull out, and the labor cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a carrier module according to an embodiment of the invention;
FIG. 2 is a schematic illustration of an anchor according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the A-A plane in FIG. 2 in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a tooth anchor according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a tooth anchor in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of an anchor chock according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of an anchor chock according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a fixing sleeve according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a retaining sleeve according to an embodiment of the present invention;
FIG. 10 is a schematic view of a supporting block according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a support block according to an embodiment of the present invention;
fig. 12 is an overall schematic of a retractable cord according to an embodiment of the present invention;
FIG. 13 is a schematic view of a carrier plate according to an embodiment of the present invention;
fig. 14 is a schematic cross-sectional view of a carrier plate according to an embodiment of the invention.
Reference numerals illustrate:
1-a carrier module; 2-an anchor block assembly; 3-a working cable;
4, a recovery rope; 5, pressing the pipe; 6, a sealing gasket;
7-a bearing plate; 8-a backstop nut; 9-a supporting block;
10-tooth form anchorage; 11-an anchor wedge; 12-steel needle;
13-a fixed sleeve; 14—a first clip; 15-pushing sleeve;
16-a push plate; 17-extruding the sleeve; 18-a guide housing;
19-a protective sleeve; 110-a first through slot; 111-a second through slot;
20-anchor backing plate; 21-stretching the anchor ring; 22-second clip.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a recyclable anchor cable, which comprises the following components: a carrier module 1; referring to fig. 1, carrier module 1 includes a guide housing 18 open at one end, a carrier plate 7, a pushing mechanism, and an anchor member disposed within guide housing 18. The bearing plate 7 is connected with the opening end of the guide housing 18 to form a closed space. The anchor device anchors the working cable 3 in the closed space, so that the penetration of concrete slurry can be prevented, and the influence of the mixing of the anchor end of the working cable 3 and the concrete slurry on the recovery and the reutilization of the working cable 3 are avoided.
The anchor is formed by splicing a plurality of parts, at least one taper hole is formed by splicing the parts, and a fixing sleeve 13 for fixing the parts is sleeved on the outer side of the anchor. The anchor device is divided into a plurality of parts, and the parts are spliced to form the anchor device; and the parts are spliced to form the taper holes on the anchor. That is, each portion of the anchor does not have an independent complete taper, each taper being formed by splicing between different portions.
The anchor is arranged on the inner side of the fixed sleeve 13, and a plurality of parts are spliced into a whole under the constraint force of the fixed sleeve 13. If the anchor member is provided with the fixing sleeve 13 at the periphery, parts of the anchor member are scattered and cannot maintain the shape of the taper hole. The outer wall of the fixed sleeve 13 is connected with the inner wall of the guide housing 18; the guide housing 18 can support and position the fixing sleeve 13. The working rope 3 is the steel strand which plays a role in anchoring. One end of at least one working cable 3 sequentially passes through the bearing plate 7 and the taper hole from the outer side of the bearing plate 7, and a first clamping piece 14 is arranged between the working cable 3 and the taper hole. I.e. one end of the working cable 3 is inserted through the carrier plate 7 into the guide housing 18 and then through the tapered hole of the anchor. One end of the working cable 3 is anchored and fixed under the cooperation of the taper hole and the first clamping piece 14, and the first clamping piece 14 is used for occluding and anchoring one end of the working cable 3.
The pushing mechanism is connected with the fixing sleeve 13 in the guide housing 18 and extends to the outer side of the bearing plate 7, and is used for pushing the fixing sleeve 13 to be separated from the anchor from the outer force of the bearing plate 7 so as to release the fixation of a plurality of parts of the anchor. The parts in the pushing mechanism can penetrate out of the bearing plate 7 to the outside, so that the force can be conveniently applied to the outside. The force applied outside the carrier plate 7 can be transmitted to the fixing sleeve 13 by the pushing mechanism, so that the fixing sleeve 13 slides along the inner wall of the guide housing 18 to disengage from the anchor. When the fixing sleeve 13 is separated from the anchor, the restraining force of a plurality of parts of the anchor is lost, the taper holes on the anchor are invalid, so that the acting force on one end of the working cable 3 is lost, the working cable 3 is in an unstressed state, and the working cable 3 can be pulled out of the carrier module 1 for recovery under a small acting force.
According to the recyclable anchor cable provided by the embodiment, the anchor device is of the splicing structure, and the anchor device is restrained through the fixing sleeve 13, so that the working cable 3 can be firmly anchored and fixed, the restraint on the anchor device can be relieved through the movement of the fixing sleeve 13, and further the working cable 3 can be easily recycled; meanwhile, the unlocking speed is high, and the working rope 3 is light and labor-saving to pull out, so that the labor cost is reduced; meanwhile, the guide housing 18 can be flexibly changed according to the number of the working cables 3, and is small in size, so that the anchor cable carrier module 1 remained in the stratum is small in size and less in damage to the underground environment.
The recyclable anchor cable adopts a clamping type group anchoring mode, so that the anchoring structure is concise and compact, the anchoring bearing capacity is large, the anchoring performance is stable, and the recyclable anchor cable is suitable for single-strand cables and multi-strand cables.
Further, the present embodiment provides a specific anchor structure based on the above embodiment. Referring to fig. 2 and 3, the anchor comprises a toothed anchor 10 and an anchor wedge 11; the anchor may be formed by splicing a toothed anchor 10 and an anchor wedge 11. Referring to fig. 4 and 5, the edge of the tooth-shaped anchor 10 is toothed, an anchor wedge 11 is arranged between any two adjacent teeth, the anchor wedge 11 and the tooth-shaped anchor 10 are spliced and connected along the circumferential direction, and a taper hole is formed between the anchor wedge 11 and the tooth-shaped anchor 10.
Referring to fig. 6 and 7, two side edges of the anchor wedge 11 are correspondingly connected with teeth at edge parts of the tooth-shaped anchors 10 at two sides. The anchor wedge 11 is filled between two teeth of the tooth anchor 10 and is movable in the radial direction of the tooth anchor 10. The edge between any two adjacent teeth of the tooth-shaped anchorage 10 can be provided with a half-cone hole, and the inner side of the anchorage wedge 11 is also provided with a half-cone hole. So that when the anchor wedge 11 is spliced with the tooth-shaped anchor 10, the two half-cone holes are connected to form a cone hole.
Further, with reference to fig. 1, the pushing mechanism includes a pushing plate 16, a pushing sleeve 15, a recovery cable 4 and an extrusion sleeve 17; one end of the pushing sleeve 15 is connected with one end of the fixing sleeve 13, which is away from the bearing plate 7. The fixed sleeve 13 has a ring structure, the pushing sleeve 15 can have a ring structure, and the fixed sleeve and the pushing sleeve can be fixedly connected, for example, by welding connection, or can be only contacted and not connected, so that the purpose of transmitting acting force can be realized. The other end of the pushing sleeve 15 is connected with a pushing plate 16. Similarly, the pushing plate 16 and the pushing sleeve 15 can be in contact or fixed connection.
One end of the recovery cable 4 sequentially passes through the bearing plate 7, the anchor device and the pushing plate 16 from the outer side of the bearing plate 7, and the extrusion sleeve 17 is sleeved on the recovery cable 4 at one side of the pushing plate 16 away from the bearing plate 7. The extrusion sleeve 17 is fixedly connected with the recovery rope 4, the other end of the recovery rope 4 can be pulled outside the bearing plate 7, and the extrusion sleeve 17 positioned at one end of the recovery rope 4 can be stressed integrally with the recovery rope 4, so that thrust towards the bearing plate 7 is generated on the thrust plate 16. And then the pushing sleeve 15 generates pushing force to the fixed sleeve 13 to push the fixed sleeve 13 to move away from the anchor device.
Further, on the basis of the above embodiment, the recovery cable 4 passes through the center portions of the carrier plate 7, the anchor member and the push plate 16, respectively. A through hole may be provided in the middle of the carrier plate 7, the anchor and the push plate 16 for the recovery cable 4 to pass through. Therefore, the recovery cable 4 acts on the middle part of the pushing plate 16, so that the fixing sleeve 13 can be uniformly forced, the fixing sleeve 13 can be smoothly separated from the anchor, the recovery of the working cable 3 can be realized, the fixing sleeve 13 can be uniformly separated from the anchor, and the recovery of each working cable 3 can be realized.
On the basis of the embodiment, further, the parts of the working cable 3 and the recovery cable 4, which are positioned outside the bearing plate 7, are respectively sleeved with a protective sleeve 19, and one end of the protective sleeve 19 is in sealing connection with the outside of the bearing plate 7. The working cable 3 and the recovery cable 4 are positioned at one section of the outer shell of the bearing plate 7 and inserted into the concrete, and the protective sleeve 19 is arranged to prevent the concrete from contacting the working cable 3 and the recovery cable 4 so as to smoothly realize the recovery and reutilization of the anchor cable.
On the basis of the above embodiment, further, the present embodiment specifically describes a sealing connection structure between one end of the sheath tube 19 and the outside of the carrier plate 7. The protective sleeve 19 is connected to the carrier plate 7 via the pressure tube 5. The diameter of the first end of the crimp tube 5 is smaller than the diameter of the second end. The first end of the pressing pipe 5 passes through the bearing plate 7 from the outer side of the bearing plate 7 and is in threaded connection with the bearing plate 7, and the second end of the pressing pipe 5 is connected with the outer side of the bearing plate 7 and is provided with a sealing gasket 6 therebetween. The first end of the crimp tube 5 is connected to a retaining nut 8 inside the carrier plate 7.
Namely, the pressure pipe 5 is in a step shape, and one end with smaller diameter is in an external thread structure. The bearing plate 7 can be provided with matched internal threaded holes. One end of the pressing pipe 5 with smaller diameter is screwed into an internal threaded hole on the bearing plate 7, and the end part is inserted into the inner side of the bearing plate 7 and connected with the retaining nut 8, so that firm connection between the pressing pipe 5 and the bearing plate 7 is realized. One end of the larger diameter part of the pressing pipe 5 is propped against the outer side surface of the bearing plate 7, so that the sealing gasket 6 is convenient to be arranged to realize the sealing connection between the pressing pipe 5 and the bearing plate 7. One end of the sheath tube 19 is inserted into the crimp tube 5 from the second end of the crimp tube 5; is sealed and fixed by extrusion. Further, the compression force between the compression tube 5 and the sheath tube 19 should be such that a seal between the two is achieved without affecting the pullout of the respective anchor lines.
Further to the above embodiment, the carrier module 1 further comprises a support block 9 provided inside the guide housing 18; one end of the supporting block 9 is connected with the inner side of the bearing plate 7, the other end of the supporting block 9 is connected with the anchorage device, the section size of the supporting block 9 is smaller than or equal to that of the anchorage device, and the supporting block 9 is provided with a through hole which is matched with the working cable 3 and the recovery cable 4.
The anchor device can be supported and fixed by arranging the supporting blocks 9; meanwhile, a certain interval is formed between the anchor device and the inner side surface of the bearing plate 7, namely the thickness of the supporting block 9, and the interval provides space for the movement of the fixed sleeve 13, so that the push plate 16 can smoothly push the fixed sleeve 13 to move towards the bearing plate 7 to be separated from the anchor device. It is further preferable that the thickness of the support block 9 is equal to or greater than the thickness of the fixing sleeve 13. The thickness of the support block 9 and the thickness of the fixing sleeve 13 are the lengths along the axial direction of the guide housing 18.
Further, with reference to fig. 2, a plurality of first through grooves 110 are circumferentially spaced on the outer wall of the anchor member, and the first through grooves are axially arranged along the anchor member; referring to fig. 8 and 9, a second through groove 111 is axially provided on the inner wall of the fixing sleeve 13 at a position corresponding to the first through groove 110, and a high strength steel needle 12 is provided between the first through groove 110 and the second through groove 111. When the fixing sleeve 13 is sleeved on the anchor, the steel column is positioned in the space surrounded by the first through groove 110 and the second through groove 111. The friction between the fixing sleeve 13 and the anchor device can be reduced by arranging the steel column, so that the fixing sleeve 13 can smoothly move to be separated from the anchor device, the acting force required during recovery is reduced, and the smooth recovery of each anchor cable can be realized.
Both ends of the first through groove 110 and one end of the second through groove 111, which is close to the bearing plate 7, are respectively provided with a stop block. The stop block can prevent the steel column from being separated. The end of the second through groove 111 away from the carrying plate 7 is not provided with a stop block so as to avoid the stop block from affecting the movement of the fixing sleeve 13 towards the carrying plate 7.
Further to the above embodiment, referring to fig. 12, a retractable anchor line further includes: an anchor seat assembly 2; the anchor seat assembly 2 comprises an anchor backing plate 20 and a tensioning anchor ring 21, the other ends of the working cable 3 and the recovery cable 4 respectively penetrate through the anchor backing plate 20 and the tensioning anchor ring 21 in sequence, and a second clamping piece 22 is arranged between the working cable 3 and the tensioning anchor ring 21.
Further, with reference to fig. 13 and 14, the diameter of the outer side of the bearing plate 7 is larger than that of the inner side, and the open end of the guide housing 18 is screwed with the inner side of the bearing plate 7 and is provided with sealant at the connection. A sealed connection of the carrier plate 7 to the guide housing 18 can be achieved. The connection between the carrier plate 7 and the guide housing 18 can also be other, with the aim of achieving a firm sealing connection.
On the basis of the above embodiment, further, this embodiment provides a method for recovering an anchor cable based on the recoverable anchor cable according to any one of the above embodiments, where the method for recovering an anchor cable includes: pulling the recovery cable 4, and applying thrust to the fixed sleeve 13 through the pushing plate 16 and the pushing sleeve 15 to enable the fixed sleeve 13 to be separated from the anchor device; pulling the working cord 3 performs recovery of the working cord 3. Pulling force is applied to the recovery cord 4, and the recovery cord 4 is pulled out to recover the recovery cord 4. Further, a pulling force is applied to the recovery cable 4, and when the recovery cable 4 is pulled out, the applied pulling force is larger than the extrusion force between the extrusion sleeve 17 and the recovery cable 4 and smaller than the limit pulling resistance of the recovery cable 4. The recovery cable 4 is used for recovering the anchor cable, and applies a force to the fixing sleeve 13, and is not used for anchoring.
On the basis of the embodiment, the pushing type quick unlocking and recycling anchor cable mainly comprises a carrier module 1, an anchoring seat module 2, a working cable 3 and a central recycling cable 4, wherein the working cable 3 and the central recycling cable 4 are connected with the carrier module 1 and the anchoring seat module. The locking mechanism of the carrier module 1 is connected and fastened by a pressing pipe 5, a sheath pipe 19, a sealing gasket 6, a carrier plate 7 and a retaining nut 8, and forms a closed space for steel strands in the working cable 3 and the recovery cable 4 to prevent concrete slurry from penetrating. The bearing plate 7 and the anchorage supporting block 9 jointly support the tooth-shaped anchorage 10 and the anchorage wedge 11, and the anchorage wedge 11 is synchronously fixed and positioned by the anti-drag high-strength steel needle 12 and the anchorage fixing sleeve 13. The working cable 3 is snap-anchored by the first clip 14. The supporting body assembly 1 is a closed space, and the pushing sleeve 15, the pushing plate 16, the extrusion sleeve 17 and the central recovery cable 4 which are fastened and unlocked above the anchor fixing sleeve 13 form the supporting body assembly.
The unlocking anchor wedge 11 separating mechanism of the carrier module 1 enables the pushing plate 16 and the pushing sleeve 15 to be pushed to the bearing direction by the central recovery rope 4 through the axial acting force on the extrusion sleeve 17 connected and meshed with the central recovery rope, namely, the direction of the anchor seat module 2 is pushed to the fixing sleeve 13 by equal force, so that the anchor fixing sleeve 13 is separated from the tooth-shaped anchor 10 and the anchor wedge 11 under the assistance of the drag reduction steel balls, at the moment, the anchor wedge 11 is separated from the tooth-shaped anchor 10 after losing fixation, and meanwhile, the conical wedge-shaped working first clamping piece 14 is also separated from the working rope 3 and the tooth-shaped anchor 10, so that the tooth-shaped anchor 10, the anchor wedge 11, the first clamping piece 14 and the working rope 3 of the original locking mechanism are simultaneously decomposed and separated to complete unlocking.
The opposite ends of the working cable 3 connected with the bearing body are the anchor backing plate 20, the tensioning anchor ring 21 and the second clamping piece 22 of the locking work of the anchor seat assembly 2 to form tensioning anchor of the anchor cable. The opposite ends of the central recovery rope 4 connected with the supporting body are through holes of the anchoring seat, and only positioning is performed without clamping locks. The anchor seat component 2 is composed of anchor backing plates 20 which are correspondingly matched with the number of the strand holes of the anchor cable, anchor rings with the same hole site specification and working second clamping pieces 22, so as to realize the prestress loading anchoring of the bearing body. The locking of the bearing body module 1 to the anchor cable is achieved by the tooth-shaped anchor 10, the anchor wedge 11, the first clamping piece 14 of the internal thread conical wedge-shaped work, the anchor fixing sleeve 13 and the working cable 3 together. The anchor cable locking mechanism and the anchor cable removing unlocking mechanism are simultaneously fused in the bearing body module 1 in a closed space in the anchor guiding housing 18.
When the anchor cable is anchored, the anchor seat assembly 2 stretches the load of the working cable 3, and the first clamping piece 14, the tooth-shaped anchor 10, the anchor wedge 11 and the anchor fixing sleeve 13 are extruded, meshed and locked under the action of opposite axial force. When the anchor cable anchoring support is completed and the anchor cable is required to be unlocked and recycled, unloading the working second clamping piece 22 of the anchor seat assembly 2 by a tensioning machine and an anchor extractor, pulling back the central recycling cable 4 by 10-20cm by a single jack, sliding the central recycling cable 4 to the anchor seat assembly 2 by an extrusion sleeve 17, a pushing plate 16, a pushing sleeve 15 and a fixing sleeve 13 under the action of the pulling back force, and simultaneously separating the fixing sleeve 13 from the toothed anchor 10, an anchor wedge 11 and the working first clamping piece 14 under the assistance of a drag reduction high-strength steel needle 12; the extrusion sleeve 17 is separated from the recovery cable 4 again under the action of force, and at the moment, all the working cables 3 and the recovery cable 4 are separated from the supporting body, so that the recovery steel strand can be pulled out easily by manpower.
The recyclable anchor cable utilizes the distribution of clamp group anchor edge taper holes to process into a tooth-shaped anchor 10 and an anchor wedge 11, a stressed taper hole of a first clamping piece 14 is divided into 2 blocks, meanwhile, an outer ring is positioned and fixed by adopting a fixing sleeve 13, when a working cable 3 conducts load, the working clamping piece generates extrusion force in the taper hole while occluding the working cable 3, the extrusion force is conducted to the tooth-shaped anchor 10 and the anchor wedge 11 again, and the extrusion force is generated to gather under the fixation of the fixing sleeve 13 to react to the working first clamping piece 14, so that an anchoring locking force is finally formed. The thrust plate 16 and the pushing sleeve 15 slide out the fixed sleeve 13 under the assistance of the drag reduction high-strength steel needle 12 by utilizing the acting force of the recovery cable 4, and the tooth-shaped anchor 10, the anchor wedge 11 and the working first clamping piece 14 are instantaneously separated to complete unlocking.
Specifically, the engagement force of the pressing sleeve 17 and the recovery cord 4 is set as follows: the small hole site is about 20MPa (corresponding to 100 KN) of 1-3 strands and about 30MPa (corresponding to 150 KN) of 4-6 strands. Therefore, the engagement force of the recovery cable 4 and the extrusion sleeve 17 must meet the sum of the unlocking force and the safety coefficient force, and when the force is exceeded, the recovery cable 4 and the extrusion sleeve 17 are separated, so that the recovery cable 4 is synchronously recovered. The material, the dimensional requirements and the engagement medium of the press jacket 17 are accordingly specified.
The recyclable anchor cable realizes the sealing technology of the carrier module 1, and prevents the concrete grout from penetrating into the inner space of the carrier module 1 to cause unlocking failure through sealing. The PE sheath tube 19 is sleeved on the outer layer of the working cable 3, the outer end of the joint of the working cable 3 and the bearing plate 7 adopts the pressing tube 5 to fix and bite the sheath tube 19, and the other end adopts the sealing gasket 6, the screw thread and the stop nut 8 to be connected with the bearing plate 7, so that the sealing requirement of the joint is ensured.
The concrete implementation steps of the recyclable anchor cable are as follows: according to the type of the needed anchor cable stock, the working cable 3 after blanking is sleeved into the PE protective sleeve 19, one end of the working cable is sleeved on the protective sleeve 19 by the pressing pipe 5 in a penetrating mode to be pressed, sealed and fixed, and the pressing tightness is suitable for being pulled by a single hand. The extruded pressing pipe 5 with an external thread end is sleeved with a sealing gasket 6 and is tightly connected with a bearing plate 7 by a retaining nut 8; the recovery rope 4 adopts the same way, so that the connection part of the working rope 3 and the recovery rope 4 is well sealed.
Referring to fig. 10 and 11, the anchor support block 9 with the corresponding countersunk end is then attached to the carrier plate 7, so that the protruding retaining nut 8 just enters the countersink to ensure surface attachment to the carrier plate 7. And pulling out the length of the steel strand and the specified length of the installation size, and sleeving the steel strand into the tooth-shaped anchor 10, the anchor wedge 11 and the fixed sleeve 13. The first clamping piece 14 is installed, the jack is used for carrying out initial extrusion and engagement on the first clamping piece 14 under the force of 5% of the total load through a special tool, the anchoring mechanism is prevented from loosening in the installation and use process, and the installation of the anchoring locking mechanism is completed.
And then installing an unlocking mechanism, placing a high-strength steel needle 12 in a hole between the anchor wedge 11 and the fixed sleeve 13, fixedly sealing the hole to prevent the high-strength steel needle 12 from sliding out to affect the effect, pulling out the recovery cable 4 to pass through the fixed sleeve 13, installing the pushing sleeve 15 and the pushing plate 16, extruding and occluding the recovery cable 4 and the extrusion sleeve 17 by using an extruder, and backing the recovery cable 4 to ensure that the extrusion sleeve 17 is adhered and fixed with the pushing plate 16, thereby completing the unlocking mechanism. Finally, the guide housing 18 is screwed to the carrier plate 7, and the assembly of the carrier module 1 is completely closed by sealing the connection threads with a sealant.
The anchor seat assembly 2 consists of an anchor backing plate 20, an anchor ring and a working second clamping piece 22, and comprises the following specific using steps: the working cable 3 and the recovery cable 4 are respectively penetrated into an anchor backing plate 20 and a tensioning anchor ring 21 which correspond to the hole sites, wherein the recovery cable 4 is penetrated into the central hole, the recovery cable 4 does not need to be provided with clamping pieces, and simultaneously the recovery cable 4 does not need to be tensioned when being tensioned and anchored. And installing a working second clamping piece 22 in the corresponding taper holes of the working cable 3 and the anchor ring. When the concrete reaches the requirement, the special stretching machine (jack, hydraulic station, tool anchor) is used to stretch the load of the anchor cable to the design value according to the construction standard, and finally the anchor cable is anchored. And after the foundation pit foundation construction is completed, the anchor rope is recovered according to the design requirement, when the anchor rope 4 is recovered, the second clamping piece 22 for working, which is engaged with the anchor rope, is unloaded and pushed away by a tensioning machine jack, a hydraulic station, an anchor withdrawing device and the like, the recovered rope 4 is loaded and pulled by a single jack, and when the single jack is 20cm long, the single jack is withdrawn, the working rope 3 and the recovered rope 4 are pulled out by a single jack, so that the whole working content of the anchor rope is completed.
The recoverable anchor cable unlocking device produced by some factories in the current market generally adopts a hot melting type, a drawing type and a mechanical type, and has some defects in practical use, such as construction difficulty, cost increase, recovery time, labor cost increase and the like caused by difficult recovery due to overlarge supporting body and incomplete unlocking.
The recoverable anchor cable provided by the embodiment overcomes the defects of the existing drawing type detachable anchor cable technology, and provides the pushing type quick unlocking recovery anchor cable which is large in anchoring bearing capacity, high in unlocking speed, good in separating and detaching effects, small in size of a bearing body, low in construction comprehensive cost, capable of recycling steel strands, and simple and easy in construction process. The anchor cable has the advantages of large anchoring bearing capacity, stable anchoring performance, small volume, high dismounting and unlocking speed and high recovery efficiency, and can be used for simultaneously installing multiple cables.
The embodiment provides a push type quick unlocking and recycling anchor cable, aims at solving the problems that the existing detachable and recycling anchor cable is complex in structure, the bearing volume of the anchor cable is large, the installation and construction difficulties and the workload are easy to increase, and meanwhile, the defects of low recycling speed, low recycling rate and the like caused by slow unlocking reaction and incomplete unlocking are overcome. The anchor cable is realized by 2 wedge-shaped modes and 1 drawing separation structure.
When the anchoring is needed, the anchor rope is anchored through tensioning (stress application) and locking of the working rope 3, and when the anchoring task is needed, the stress of the anchor rope is unloaded and the steel strand embedded in the stratum concrete is recovered, the steel strand can be quickly unlocked and manually pulled out through the acting force of the recovery rope 4. The clamp type group anchoring form is adopted, so that the structure is simple and compact, the anchoring bearing capacity is high, the anchoring performance is stable, the clamp type group anchoring structure is suitable for single-strand cables and multi-strand locks, and the clamp type group anchoring structure is small in size and is more suitable for small-caliber sleeves with economical effectiveness and the construction process of rotary spraying. The unlocking mechanism adopts a mechanical structure, has the characteristics of compact and reasonable structure, convenient processing and installation, good safety and stability and the like, simultaneously has high unlocking speed, light and labor-saving steel strand pulling, reduces labor cost, and simultaneously has less influence harm to underground environment due to the anchor cable carrier (small volume) remained in the stratum.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. A retractable anchor cable comprising: a carrier module; the supporting body module comprises a guide housing with an opening at one end, a bearing plate, a pushing mechanism and an anchor device arranged in the guide housing; the bearing plate is connected with the opening end of the guide housing to form a closed space;
the anchor device is formed by splicing a plurality of parts, at least one taper hole is formed by splicing the parts, a fixing sleeve for fixing the parts is sleeved on the outer side of the anchor device, and the outer wall of the fixing sleeve is connected with the inner wall of the guide housing; one end of at least one working cable sequentially passes through the bearing plate and the taper hole from the outer side of the bearing plate, and a first clamping piece is arranged between the working cable and the taper hole;
the pushing mechanism is connected with the fixing sleeve in the guide housing and extends to the outer side of the bearing plate, and is used for forcing the fixing sleeve to be separated from the anchorage device from the outer side of the bearing plate so as to release the fixation of a plurality of parts of the anchorage device;
the anchor comprises a tooth-shaped anchor and an anchor wedge; the edge of the tooth-shaped anchorage is tooth-shaped, the anchorage wedge block is arranged between any two adjacent teeth, the anchorage wedge block and the tooth-shaped anchorage are connected in a spliced mode along the circumferential direction, and the taper hole is formed between the anchorage wedge block and the tooth-shaped anchorage;
the pushing mechanism comprises a pushing plate, a pushing sleeve, a recovery rope and an extrusion sleeve; one end of the pushing sleeve is connected with one end of the fixing sleeve, which is far away from the bearing plate, the other end of the pushing sleeve is connected with the pushing plate, one end of the recovery cable sequentially passes through the bearing plate, the anchor device and the pushing plate from the outer side of the bearing plate, and the extrusion sleeve is sleeved on the recovery cable at one side of the pushing plate, which is far away from the bearing plate;
the bearing body module further comprises a supporting block arranged inside the guide housing; one end of the supporting block is connected with the inner side of the bearing plate, the other end of the supporting block is connected with the anchorage device, the section size of the supporting block is smaller than or equal to that of the anchorage device, and the supporting block is provided with a through hole which is matched with the working cable and the recovery cable;
a plurality of first through grooves are formed in the outer wall of the anchor device at intervals along the circumferential direction, and the first through grooves are formed in the axial direction of the anchor device; a second through groove is axially formed in the inner wall of the fixed sleeve at a position corresponding to the first through groove, and a steel needle is arranged between the first through groove and the second through groove; and the two ends of the first through groove and one end of the second through groove, which is close to the bearing plate, are respectively provided with a stop block.
2. The retractable anchor line of claim 1, wherein the retractable cable passes through a central portion of the load plate, the anchor member, and the thrust plate, respectively.
3. The recoverable anchor cable of claim 1, wherein the working cable and the portion of the recovery cable located outside the load board are respectively sleeved with a protective sleeve, and one end of the protective sleeve is in sealing connection with the outside of the load board.
4. A recoverable anchor cable according to claim 3, wherein the sheath tube is connected to the carrier plate by a pressure tube, the diameter of the first end of the pressure tube is smaller than that of the second end, the first end of the pressure tube passes through the carrier plate from the outside of the carrier plate and is in threaded connection with the carrier plate, the second end of the pressure tube is connected to the outside of the carrier plate with a sealing gasket therebetween, the first end of the pressure tube is connected to a retaining nut on the inside of the carrier plate, and one end of the sheath tube is inserted into the pressure tube from the second end of the pressure tube.
5. The retractable anchor line of claim 1, further comprising: an anchor block assembly; the anchor seat assembly comprises an anchor backing plate and a tensioning anchor ring, the other ends of the working rope and the recovery rope respectively penetrate through the anchor backing plate and the tensioning anchor ring in sequence, and a second clamping piece is arranged between the working rope and the tensioning anchor ring.
6. The retractable anchor cable of claim 1, wherein the diameter of the outer side of the carrier plate is greater than the diameter of the inner side, and the open end of the guide housing is threaded with the inner side of the carrier plate and is provided with a sealant at the connection.
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| CN112962596B (en) * | 2021-03-09 | 2022-04-08 | 福州大学 | Anchor cable structure capable of being repaired after earthquake and application method thereof |
| CN114000900B (en) * | 2021-10-26 | 2023-08-25 | 安标国家矿用产品安全标志中心有限公司 | Anchor device capable of recycling anchor cable and mounting, recycling and locking method thereof |
| CN116464041B (en) * | 2023-04-24 | 2023-10-03 | 中铁一局集团市政环保工程有限公司 | Recyclable prestressed anchor cable and construction method |
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