CN114991839B - Push pipe type deformation assembly for anchor cable and anchor rod and application method thereof - Google Patents
Push pipe type deformation assembly for anchor cable and anchor rod and application method thereof Download PDFInfo
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- CN114991839B CN114991839B CN202210640774.5A CN202210640774A CN114991839B CN 114991839 B CN114991839 B CN 114991839B CN 202210640774 A CN202210640774 A CN 202210640774A CN 114991839 B CN114991839 B CN 114991839B
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- constraint ring
- shrinkage
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000011378 shotcrete Substances 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000452 restraining effect Effects 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0086—Bearing plates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a jacking pipe type deformation assembly for an anchor rope and an anchor rod and an application method thereof, wherein the jacking pipe type deformation assembly comprises a constraint ring and a shrinkage tube; the constraint ring is of an annular structure, and the inner diameter of the constraint ring is gradually reduced from the outer side to the inner side; the shrinkage tube is a hollow tube, the outer diameter of the main body is larger than the minimum inner diameter of the constraint ring, and the radial rigidity of the shrinkage tube is smaller than that of the constraint ring; when the constraint ring and the shrinkage tube are coaxially extruded with each other, the radial deformation of the constraint ring is small, the shrinkage tube generates remarkable radial shrinkage deformation, so that the outer diameter of the main body of the shrinkage tube is equal to the minimum inner diameter of the constraint ring, and the two parts slide relatively; the maximum sliding deformation is the deformation capacity of the push pipe type deformation assembly. The invention can effectively realize stable high-strength constant-resistance yielding, has simple structure and low manufacturing cost, and does not need reaming construction; the deformation of the anchor cable or the anchor rod can be observed in real time, and the deformation of the rock mass can be calculated, so that the danger is early warned.
Description
Technical Field
The invention belongs to the field of geotechnical engineering reinforcement, and particularly relates to a jacking pipe type deformation assembly for an anchor rope and an anchor rod and an application method thereof.
Background
The anchor cable and the anchor rod are commonly used supporting equipment in projects such as mines, tunnels, water conservancy and hydropower. Under the conditions of overlarge deformation of rock mass, rock burst or earthquake and the like, the traditional anchoring structure allows the deformation to be smaller, so that the damage is easy to occur, and the instability damage accident of underground engineering is caused. Thus, scholars have proposed a number of large deformation anchor lines and bolts that provide high support resistance while being subjected to large deformations.
The existing large-deformation anchor cable has the problems of complex structure, high cost and difficulty in applying prestress. The patent CN215256268U provided by the inventor of the application utilizes plastic deformation of metal to provide stable supporting resistance and yielding deformation of the large-deformation anchor cable, but the large-deformation anchor cable needs reaming in a rock mass in the installation process, has high construction difficulty, has a complex structure and is high in manufacturing and application cost.
Disclosure of Invention
In view of the above, the invention aims to provide a pipe jacking type deformation assembly for an anchor rope and an anchor rod and an application method thereof, and solves the problems of complex structure, high reaming construction difficulty and high cost of the conventional device.
The invention is realized by adopting the following scheme: a push pipe type deformation assembly for anchor cables and anchor rods comprises a constraint ring and a shrinkage tube; the assembly is integrally arranged on the outer side of a rock body, the anchor cable tray or the anchor rod tray is abutted against the rock body corresponding to the anchor holes, the inner side of the constraint ring is abutted against the outer side of the tray corresponding to the anchor holes, and the inner end of the shrinkage tube is inserted into the constraint ring corresponding to the anchor holes; the outer end of the anchor cable steel strand or the anchor rod body sequentially passes through the tray, the constraint ring and the shrinkage tube, and an anchor cable anchor or an anchor rod nut is connected to the outer side;
the constraint ring is of an annular structure, the inner diameter of the constraint ring is gradually reduced from the outer side to the inner side, and after the constraint ring is reduced to the minimum inner diameter, the inner diameter is kept unchanged or is slightly enlarged;
the shrinkage tube is a hollow tube, the outer diameter of the main body of the shrinkage tube is larger than the minimum inner diameter of the constraint ring, and the radial rigidity of the shrinkage tube is smaller than that of the constraint ring;
when the constraint ring and the shrinkage tube are coaxially extruded with each other, the radial deformation of the constraint ring is small, the shrinkage tube generates remarkable radial shrinkage deformation, the outer diameter of the main body of the shrinkage tube is equal to the minimum inner diameter of the constraint ring, and meanwhile, the two parts generate relative sliding;
after the inner end of the shrinkage tube is inserted into the constraint ring, the shrinkage tube still has a certain length at the outer side of the constraint ring, and the length is the maximum relative sliding amount of the shrinkage tube and the constraint ring and the maximum deformation capacity of the jacking pipe type deformation assembly.
Furthermore, the inner end of the shrinkage tube is provided with a shrinkage opening, so that the inner end of the shrinkage tube can be conveniently inserted into the constraint ring, and the problem that the central lines of the shrinkage tube and the constraint ring are not coaxial can be prevented.
Further, the shrinkage rate of the section of the shrinkage tube is between 1 and 36 percent in the process of passing through the constraint ring, the bearing capacity cannot be fully exerted if the shrinkage rate of the section is too small, and the shrinkage tube is unstable in crushing stress if the shrinkage rate of the section is too large; the cross-sectional shrinkage is the percentage of the shrinkage of the cross-sectional area of the shrink tube to the original cross-sectional area.
Further, the constraint ring and the tray are integrally formed; the constraint ring and the tray are combined into a whole, or the periphery of the constraint ring is enlarged to ensure that the constraint ring has the function of constraining the rock mass by the tray, so that the number of components can be reduced.
Furthermore, the outer surface of the shrinkage tube and the inner surface of the constraint ring are coated with lubricating materials, so that the contact relation between the shrinkage tube and the constraint ring can be improved, and the resistance of the shrinkage tube and the constraint ring when sliding occurs is more stable.
Further, the outer surface of the shrinkage tube is provided with a soft coating layer, the outer diameter of the soft coating layer is equal to or larger than the outer diameter of the anchor or the nut, and sprayed concrete of the anchor or the nut in post-extrusion construction in the assembly deformation process is prevented.
Further, the outer surface of the shrinkage tube is provided with scale marks and/or annular color marks; the relative slippage between the shrinkage tube and the constraint ring is convenient to observe, so that the deformation degree of the rock mass is identified.
The application method of the pipe-jacking type deformation assembly for the anchor cable and the anchor rod is characterized by comprising the following steps of:
step 1: drilling an anchor hole in a rock mass to be supported, wherein the diameter of the anchor hole is larger than that of an anchor cable steel strand (anchor rod body), rotationally pushing the anchor cable steel strand (anchor rod body) into the anchor hole, and fixing the inner end of the anchor cable steel strand (anchor rod body) in the anchor hole through an anchoring agent;
step 2: the method comprises the steps of sequentially sleeving a tray, a constraint ring, a shrinkage tube and an anchor (nut) on an anchor cable steel strand (anchor rod body), and pressing the components on the surface of a rock body through the anchor (nut) to enable the tray to prop against the rock body, the constraint ring to prop against the tray, the shrinkage tube to prop against the constraint ring and the anchor (nut) to prop against the shrinkage tube;
step 3: the anchor (nut) is tightened by applying a prestressing force by means of a tensioning device as required.
Furthermore, when the pipe-jacking type deformation assembly is used for an anchor rope (anchor rod) of underground engineering, the length of the shrinkage pipe is designed according to the deformation condition of a rock mass at a construction section behind the current section, so that the length of the shrinkage pipe is approximately equal to or slightly larger than the deformation amount of the rock mass, and the length of an exposed structure after the deformation of the rock mass is prevented from greatly obstructing subsequent construction.
Further, when the pipe jacking type deformation assembly is used for an anchor cable of an underground engineering, the construction of spraying concrete on the surface of a tunnel is usually carried out after the steps are completed, if the concrete cannot completely cover the pipe jacking type high-strength deformation assembly, and the subsequent rock mass deformation cannot squeeze a shrinkage tube into the outer surface of the sprayed concrete, in order to prevent the exposed section of the anchor cable from invading a line, a stretching device is used for stretching a steel strand and squeezing the shrinkage tube after the rock mass deformation is basically stopped, the shrinkage tube is forced to squeeze into a constraint ring, so that the outer end face of the shrinkage tube is positioned in the outer surface of the sprayed concrete, and redundant anchor cable steel strands are cut off.
Compared with the prior art, the invention has the following beneficial effects: the design is reasonable, and the pipe jacking type deformation assembly can effectively realize stable high-strength constant-resistance yielding; the structure is simple, and the manufacturing cost is low; the deformation assembly is integrally arranged on the outer side of the rock body, reaming construction is not needed, construction procedures are greatly simplified, and the labor intensity of an engineering site is reduced; the deformation degree of the deformation assembly (namely the sliding deformation amount between the constraint ring and the shrinkage tube) is clear, the deformation amount of the anchor cable (anchor rod) can be observed in real time, and the deformation of the rock mass can be calculated, so that the danger is warned; the deformation can be forced by external force intervention to prevent the redundant exposed structure from interfering with other procedures.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention after installation for an anchor cable;
fig. 2 is a schematic cross-sectional view of the cable of the present invention after a deformation;
FIG. 3 is a schematic cross-sectional view of the combination of the confinement rings and the tray of the present invention;
FIG. 4 is a schematic cross-sectional view of the present invention after installation for a bolt;
FIG. 5 is a schematic view of a shrink tube of the present invention with a simple shrink fit;
FIG. 6 is a schematic view of the shrink tube of the present invention without a shrink wrap;
FIG. 7 is a schematic cross-sectional view of the confinement ring of the invention with the inside diameter in two lines;
FIG. 8 is a schematic cross-sectional view of the confinement ring of the invention with the inside diameter taken in three lines;
FIG. 9 is a schematic cross-sectional view of the inner diameter of the confinement ring of the invention in the form of an arc;
fig. 10 is a plot of tension versus displacement under laboratory tension as the present invention is applied to a cable bolt.
In the figure: 1-constraint ring, 2-shrink tube, 3-tray, 4-anchor, 5-nut, 6-anchor cable steel strand, 7-anchor rod, 8-rock mass and 9-soft coating.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1-10, a push pipe type deformation assembly for anchor cables and anchor rods comprises a constraint ring 1 and a shrinkage tube 2, and is matched with the existing anchor cables or anchor rods for application; the whole assembly is arranged at the outer side of the rock mass 8, the anchor cable tray or the anchor rod tray 3 is abutted against the rock mass 8 corresponding to the anchor holes, the inner side of the constraint ring is abutted against the outer side of the tray corresponding to the anchor holes, and the inner end of the shrinkage tube is inserted into the constraint ring corresponding to the anchor holes; the outer end of the anchor cable steel strand 6 or the anchor rod body 7 sequentially passes through the tray, the constraint ring and the shrinkage tube, and the outer side is connected with the anchor cable anchorage 4 or the anchor rod nut 5;
the constraint ring is of an annular structure, the inner diameter of the constraint ring is gradually reduced from the outer side to the inner side, and after the constraint ring is reduced to the minimum inner diameter, the inner diameter is kept unchanged or is slightly enlarged; the inner ring surface of the constraint ring can be an arc line, can be a double folding line with the diameter gradually reduced from outside to inside and then unchanged or slightly enlarged, can be a triple folding line with the diameter gradually reduced from outside to inside and then unchanged and then gradually enlarged, and can realize that the inner diameter of the constraint ring gradually reduces from outside to inside and then keeps unchanged or slightly enlarged after the inner diameter is reduced to the minimum inner diameter;
the shrinkage tube is a hollow tube, the outer diameter of the main body of the shrinkage tube is larger than the minimum inner diameter of the constraint ring, and the radial rigidity of the shrinkage tube is smaller than that of the constraint ring;
one preferable shape of the constraint ring is a circular ring, and the preferable shape of the shrinkage tube is a hollow circular tube; however, it should be noted that the constraint ring may also be an elliptical ring, a polygonal ring, or other structures, and the corresponding shrink tube may also be an elliptical tube, a polygonal tube, or other structures;
when the constraint ring and the shrinkage tube are coaxially extruded with each other, the radial deformation of the constraint ring is small, the shrinkage tube generates remarkable radial shrinkage deformation, the outer diameter of the main body of the shrinkage tube is equal to the minimum inner diameter of the constraint ring, and meanwhile, the two parts generate relative sliding;
after the inner end of the shrinkage tube is inserted into the constraint ring, the shrinkage tube still has a certain length at the outer side of the constraint ring, and the length is the maximum relative sliding amount of the shrinkage tube and the constraint ring and the maximum deformation capacity of the jacking pipe type deformation assembly.
In this embodiment, the inner end of the shrink tube is provided with a shrink mouth, so that the inner end of the shrink tube can be conveniently inserted into the constraint ring, and the problem that the center lines of the shrink tube and the constraint ring are not coaxial can be prevented.
In the embodiment, the shrinkage rate of the section of the shrinkage tube is between 1% and 36% in the process of passing through the constraint ring, the bearing capacity cannot be fully exerted if the shrinkage rate of the section is too small, and the shrinkage tube is unstable in crushing stress if the shrinkage rate of the section is too large; the cross-sectional shrinkage is the percentage of the shrinkage of the cross-sectional area of the shrink tube to the original cross-sectional area.
In this embodiment, the outer surface of the shrink tube and the inner surface of the constraint ring are coated with a lubricating material, so that the contact relationship between the outer surface of the shrink tube and the inner surface of the constraint ring can be improved, and the resistance between the outer surface of the shrink tube and the inner surface of the constraint ring when slip occurs is more stable.
As shown in fig. 1, the outer surface of the shrinkage tube is provided with a soft coating layer 9, and the outer diameter of the soft coating layer is equal to or larger than the outer diameter of the anchor or the nut, so that sprayed concrete of the anchor or the nut in the post-extrusion construction in the assembly deformation process is prevented. When the shrinkage tube deforms into the confinement ring, the soft coating is separated from the shrinkage tube and remains outside the confinement ring.
As shown in fig. 3, the restraining ring and the tray are integrally formed, i.e. the restraining ring and the tray are combined into a whole, or the periphery of the restraining ring is enlarged to enable the restraining ring to have the function of restraining the rock mass by the tray.
In addition, in order to identify the deformation degree of the rock mass, the outer surface of the shrinkage tube can be provided with scale marks and/or annular color marks; the relative slippage between the shrink tube and the confinement rings is convenient to observe.
In addition, the outer surface of the shrinkage tube and the inner ring surface of the constraint ring can be provided with a rust-proof layer.
In addition, the shrink tube and the anchor can be integrally formed.
In addition, the pipe-jacking type high-strength deformation assembly can further comprise a relative displacement monitoring unit and a wireless communication unit between the shrinkage pipe and the constraint ring, and can send relative displacement of the shrinkage pipe and the constraint ring to the remote terminal, and early warning is sent when deformation accumulation is large or greatly increased in a short time.
An application method of a pipe-jacking deformation assembly for an anchor rope and an anchor rod comprises the following steps:
step 1: drilling an anchor hole in a rock mass to be supported, wherein the diameter of the anchor hole is larger than that of an anchor cable steel strand (anchor rod body), rotationally pushing the anchor cable steel strand (anchor rod body) into the anchor hole, and fixing the inner end of the anchor cable steel strand (anchor rod body) in the anchor hole through an anchoring agent;
step 2: the method comprises the steps of sequentially sleeving a tray, a constraint ring, a shrinkage tube and an anchor (nut) on an anchor cable steel strand (anchor rod body), and pressing the components on the surface of a rock body through the anchor (nut) to enable the tray to prop against the rock body, the constraint ring to prop against the tray, the shrinkage tube to prop against the constraint ring and the anchor (nut) to prop against the shrinkage tube;
step 3: the anchor (nut) is tightened by applying a prestressing force by means of a tensioning device as required.
When the pipe-jacking type deformation assembly is used for an anchor rope (anchor rod) of underground engineering, the length of the shrinkage pipe is designed according to the deformation condition of a rock mass at a construction section behind the current section, so that the length of the shrinkage pipe is approximately equal to or slightly larger than the deformation amount of the rock mass, and the length of an exposed structure after deformation of the rock mass is prevented from greatly obstructing subsequent construction.
When the pipe jacking type deformation assembly is used for an anchor cable of underground engineering, the construction of spraying concrete on the surface of a tunnel is usually carried out after the steps are finished, if the concrete cannot completely cover the pipe jacking type high-strength deformation assembly, and the subsequent rock mass deformation cannot squeeze a contraction pipe into the outer surface of the sprayed concrete, in order to prevent the exposed section of the anchor cable from invading a line, a steel strand is tensioned and the contraction pipe is squeezed through a tensioning device after the rock mass deformation is basically stopped, the contraction pipe is forced to squeeze into a constraint ring, the outer end surface of the contraction pipe is positioned into the outer surface of the sprayed concrete, and the redundant anchor cable steel strand is cut off
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, the orientation or positional relationship indicated by the terms used to indicate positional relationships such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. applied to any of the above-described technical aspects of the present disclosure are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present patent, and do not indicate or imply that the device or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present patent, and the terms used to indicate shapes applied to any of the above-described technical aspects of the present disclosure include shapes that are approximated, similar or close thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (9)
1. The push pipe type deformation assembly for the anchor cable and the anchor rod is characterized in that; comprises a constraint ring and a shrinkage tube; the assembly is integrally arranged on the outer side of a rock body, the anchor cable tray or the anchor rod tray is abutted against the rock body corresponding to the anchor holes, the inner side of the constraint ring is abutted against the outer side of the tray corresponding to the anchor holes, and the inner end of the shrinkage tube is inserted into the constraint ring corresponding to the anchor holes; the outer end of the anchor cable steel strand or the anchor rod body sequentially passes through the tray, the constraint ring and the shrinkage tube, and an anchor cable anchor or an anchor rod nut is connected to the outer side;
the constraint ring is of an annular structure, the inner diameter of the constraint ring is gradually reduced from the outer side to the inner side, and after the constraint ring is reduced to the minimum inner diameter, the inner diameter is kept unchanged or is slightly enlarged;
the shrinkage tube is a hollow tube, the outer diameter of the main body of the shrinkage tube is larger than the minimum inner diameter of the constraint ring, and the radial rigidity of the shrinkage tube is smaller than that of the constraint ring;
when the constraint ring and the shrinkage tube are coaxially extruded with each other, the radial deformation of the constraint ring is small, the shrinkage tube generates remarkable radial shrinkage deformation, the outer diameter of the main body of the shrinkage tube is equal to the minimum inner diameter of the constraint ring, and meanwhile, the two parts generate relative sliding;
after the inner end of the shrinkage tube is inserted into the constraint ring, the shrinkage tube still has a certain length outside the constraint ring, wherein the length is the maximum relative sliding amount of the shrinkage tube and the constraint ring and the maximum deformation capacity of the jacking pipe type deformation assembly;
the section shrinkage rate of the shrinkage tube is between 1% and 36% in the process of passing through the constraint ring.
2. The push-to-tube deformation assembly for anchor cables and bolts according to claim 1, wherein the inner end of the shrink tube is provided with a shrinkage opening to facilitate insertion of the inner end of the shrink tube into the confinement ring and to prevent the problem of misalignment of the centerlines of the shrink tube and the confinement ring.
3. The push-to-tube deformation assembly for anchor lines and bolts according to claim 1, wherein the confinement rings and the tray are integrally formed.
4. The push-to-tube deformation assembly for anchor lines and bolts according to claim 1, wherein the outer surface of the shrink tube and the inner surface of the confinement ring are coated with a lubricating material.
5. The push-to-tube deformation assembly for anchor lines and bolts according to claim 1, wherein the outer surface of the shrink tube is provided with a soft coating layer having an outer diameter equal to or larger than the outer diameter of the anchor or nut.
6. The push-to-tube deformation assembly for anchor lines and bolts according to claim 1, wherein the outer surface of the shrink tube is provided with scale marks and/or annular color marks.
7. A method of using the push-to-pipe deformation assembly for anchor cables and bolts of claim 1, comprising the steps of:
step 1: drilling an anchor hole in a rock mass to be supported, wherein the diameter of the anchor hole is larger than that of an anchor cable steel strand or an anchor rod body, rotationally pushing the anchor cable steel strand or the anchor rod body into the anchor hole, and fixing the inner end of the anchor cable steel strand or the anchor rod body into the anchor hole through an anchoring agent;
step 2: the method comprises the steps of sequentially sleeving a tray, a constraint ring, a shrinkage tube and an anchor on an anchor cable steel strand or an anchor rod body, and pressing the components on the surface of a rock body through the anchor to enable the tray to prop against the rock body, the constraint ring to prop against the tray, the shrinkage tube to prop against the constraint ring and the anchor to prop against the shrinkage tube;
step 3: the anchor is tightened by applying a pre-stress through the tensioning device as required.
8. The method of claim 7, wherein when the push-tube deformation assembly is used in an anchor cable or an anchor rod for underground works, the length of the shrinkage tube is designed according to the deformation of the rock mass at a stage after the current section, so that the length of the shrinkage tube is approximately equal to or slightly greater than the deformation of the rock mass.
9. The method of claim 8, wherein when the push-tube deformation assembly is used in an anchor cable for underground works, the steel strand is stretched by a stretching device and the shrinkage tube is extruded after the deformation of the rock mass is substantially stopped, the shrinkage tube is forcibly extruded into the confinement ring so that the outer end surface thereof is positioned within the outer surface of the sprayed concrete, and the redundant anchor cable steel strand is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210640774.5A CN114991839B (en) | 2022-06-08 | 2022-06-08 | Push pipe type deformation assembly for anchor cable and anchor rod and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210640774.5A CN114991839B (en) | 2022-06-08 | 2022-06-08 | Push pipe type deformation assembly for anchor cable and anchor rod and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114991839A CN114991839A (en) | 2022-09-02 |
| CN114991839B true CN114991839B (en) | 2024-02-20 |
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| CN202210640774.5A Active CN114991839B (en) | 2022-06-08 | 2022-06-08 | Push pipe type deformation assembly for anchor cable and anchor rod and application method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2124999U (en) * | 1992-04-02 | 1992-12-16 | 中国矿业大学 | High resistance extending anchor end fastener |
| CN2709524Y (en) * | 2004-03-27 | 2005-07-13 | 柳州欧维姆机械股份有限公司 | Autoregulation stress cable |
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| CN101225745A (en) * | 2008-02-18 | 2008-07-23 | 山西晋城无烟煤矿业集团有限责任公司 | Novel anchor cable for changing direction |
| CN203809024U (en) * | 2014-02-10 | 2014-09-03 | 扬州中矿矿业技术发展有限公司 | Novel tail fastening device for threaded anchor rod |
| CN104653208A (en) * | 2015-01-19 | 2015-05-27 | 中国矿业大学 | Simple micro-added resistance large-deformation anchorage device and method |
| CN109209457A (en) * | 2018-10-26 | 2019-01-15 | 辽宁工程技术大学 | A kind of energy-absorbing erosion control anchor cable and its application method |
| CN109281694A (en) * | 2018-10-22 | 2019-01-29 | 山东建筑大学 | Can the self-locking of real-time display anchor pole or anchor cable axle power allow pressure pallet and operating method |
| CN113944492A (en) * | 2021-10-14 | 2022-01-18 | 中铁隧道集团二处有限公司 | Expansion shell type yielding anchor cable and construction method thereof |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2124999U (en) * | 1992-04-02 | 1992-12-16 | 中国矿业大学 | High resistance extending anchor end fastener |
| CN2709524Y (en) * | 2004-03-27 | 2005-07-13 | 柳州欧维姆机械股份有限公司 | Autoregulation stress cable |
| CN200952401Y (en) * | 2006-09-27 | 2007-09-26 | 郑州宇建预应力有限公司 | Mine anchor |
| CN101225745A (en) * | 2008-02-18 | 2008-07-23 | 山西晋城无烟煤矿业集团有限责任公司 | Novel anchor cable for changing direction |
| CN203809024U (en) * | 2014-02-10 | 2014-09-03 | 扬州中矿矿业技术发展有限公司 | Novel tail fastening device for threaded anchor rod |
| CN104653208A (en) * | 2015-01-19 | 2015-05-27 | 中国矿业大学 | Simple micro-added resistance large-deformation anchorage device and method |
| CN109281694A (en) * | 2018-10-22 | 2019-01-29 | 山东建筑大学 | Can the self-locking of real-time display anchor pole or anchor cable axle power allow pressure pallet and operating method |
| CN109209457A (en) * | 2018-10-26 | 2019-01-15 | 辽宁工程技术大学 | A kind of energy-absorbing erosion control anchor cable and its application method |
| CN113944492A (en) * | 2021-10-14 | 2022-01-18 | 中铁隧道集团二处有限公司 | Expansion shell type yielding anchor cable and construction method thereof |
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| CN114991839A (en) | 2022-09-02 |
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