CN113047879B - Extendable double-yielding anchor cable structure and use method thereof - Google Patents
Extendable double-yielding anchor cable structure and use method thereof Download PDFInfo
- Publication number
- CN113047879B CN113047879B CN202110285190.6A CN202110285190A CN113047879B CN 113047879 B CN113047879 B CN 113047879B CN 202110285190 A CN202110285190 A CN 202110285190A CN 113047879 B CN113047879 B CN 113047879B
- Authority
- CN
- China
- Prior art keywords
- yielding
- anchor cable
- anchor
- baffle
- energy absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 29
- 238000004873 anchoring Methods 0.000 claims abstract description 28
- 238000013016 damping Methods 0.000 claims description 36
- 238000010521 absorption reaction Methods 0.000 claims description 34
- 230000008093 supporting effect Effects 0.000 claims description 32
- 239000000872 buffer Substances 0.000 claims description 28
- 230000001681 protective effect Effects 0.000 claims description 24
- 230000003139 buffering effect Effects 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
- 239000011440 grout Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims 8
- 230000035939 shock Effects 0.000 claims 1
- 241001391944 Commicarpus scandens Species 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 27
- 239000010959 steel Substances 0.000 description 27
- 239000002184 metal Substances 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000002002 slurry Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an extensible dual-yielding anchor cable structure which comprises an anchoring end used for being fixed at the tail end of an anchor hole, a secondary yielding structure arranged in the anchor hole, a primary yielding structure arranged at an outlet of the anchor hole, a first anchor cable used for connecting the anchoring end with the secondary yielding structure, and a second anchor cable used for connecting the secondary yielding structure with the primary yielding structure, wherein the secondary yielding structure is used for yielding the first anchor cable, and the primary yielding structure is used for yielding the second anchor cable. The invention also provides a use method of the stretchable double yielding anchor cable structure. The invention provides an extensible dual-yielding anchor cable structure, which is characterized in that a first-stage yielding mechanism is used for respectively yielding a second anchor cable, and a second-stage yielding mechanism is used for yielding a first anchor cable, so that the tensile capacity of the first anchor cable and the second anchor cable is improved, and the problem that the anchor cable is easy to break due to large deformation of surrounding rock is solved.
Description
Technical Field
The invention relates to the technical field of roadway and underground engineering support, in particular to an extensible dual-yielding anchor cable structure and a using method thereof.
Background
With the continuous improvement of the rock-soil anchoring theory, technology, specification and construction mode, components such as anchor rods, cables and the like become indispensable important structures in the excavation and support process of tunnels, roadways, foundation pits and other underground space engineering gradually. However, with the development of various underground engineering to deep and more complex strata, the problem of large deformation of surrounding rocks is more and more, and due to the fact that the common anchor rod cable component is single in material and structure, although the supporting density is increased and higher pretightening force is applied, the supporting effect is reduced and the supporting structure is completely failed due to the fact that the common anchor rod cable component is difficult to adapt to the development of large deformation of the surrounding rocks in deep high-stress tunnels and tunnels.
The reason is that the deformation allowed by the traditional anchor rod cable structure is small, when deep surrounding rock is greatly deformed and the deformation exceeds the bearing range of the traditional anchor rod cable, the anchor rod cable is broken, and the supporting structure is invalid. Therefore, in the process of supporting underground engineering such as deep high-stress roadways and tunnels, the concept of releasing partial surrounding rock deformation and combining resistance needs to be carried out for targeted supporting, so that the supporting structure can adapt to partial deformation of the surrounding rock and can be guaranteed to have enough strength to play the best supporting effect on the surrounding rock.
The anchor cable is used as an important supporting structure and widely applied to the field of rock-soil anchoring, but in deep underground engineering, the disadvantage that the elongation is insufficient when the anchor cable is used for dealing with deep large-deformation surrounding rocks is fully reflected due to the low elongation of the anchor cable, so that the anchor cable structure is rarely considered by constructors in deep large-deformation roadways. Aiming at the characteristic of large deformation of surrounding rocks of the roadway, the yielding anchor cable which has better stretching performance, can carry out multistage yielding and ensures that the whole structure of the yielding anchor cable does not lose efficacy is sought, and the yielding anchor cable has important practical significance for supporting the large-deformation roadway.
Disclosure of Invention
The invention solves the technical problem that the traditional anchor cable is broken due to low elongation and poor yielding effect and cannot adapt to large deformation of surrounding rock in the prior art, and provides the extensible double yielding anchor cable structure which is simple in structure and reasonable in design.
The invention is realized by the following technical scheme:
the utility model provides a dual pressure anchor rope structure of letting that can extend, includes the anchor end that is used for fixing on the anchor eye is terminal, locates the second grade in the anchor eye and lets the pressure structure, locates the one-level of anchor eye exit and lets the pressure structure, is used for connecting the anchor end with the first anchor rope of the second grade structure of letting, and be used for connecting the second grade let the pressure structure with the second anchor rope of the one-level structure of letting, the second grade lets the pressure structure be used for right the first anchor rope lets the pressure, the one-level lets the pressure structure be used for right the second anchor rope lets the pressure.
As above a dual pressure anchor rope structure that lets that can extend, the second grade lets press the structure include with the anchor rope that first anchor rope is connected extends and lets presses the crash box, locates the anchor rope extends and lets press the crash box outside and with the closure flap that the second anchor rope is connected, and locate the anchor rope extend let press the crash box with between the closure flap and be used for providing the buffer gear of resistance when both relative movement, in the anchor hole the anchor rope extend let press the crash box with form closed area between the closure flap.
As above a dual anchor rope structure of stepping down that can extend, the anchor rope extend step down the energy-absorbing box include with anchor eye complex protective sleeve, locate in the protective sleeve and be used for with the fixed stop that first anchor rope is connected locates damping slide rail in the protective sleeve, with the gliding slide damper of damping slide rail cooperation, buffer gear is including being used for connecting slide damper with the connecting rod of closed stop to and both ends are connected respectively slide damper with the baffle supporting spring of fixed stop, closed stop toward keeping away from drive when protective sleeve direction removes slide damper is toward compressing baffle supporting spring direction removes.
As above, the anchor cable stretching yielding energy absorption box further comprises a sliding ring arranged between the sliding baffle and the fixed baffle and in sliding fit with the damping sliding rail, and the buffer mechanism further comprises a buffer yielding spring, wherein two ends of the buffer yielding spring are respectively connected with the sliding baffle and the sliding ring and encircle the connecting rod.
As above the extendable dual yielding anchor cable structure, the one-level yielding structure comprises a lower tray and an upper tray which are used for jacking and pressing surrounding rocks at the opening of the anchor hole, and a shock-absorbing compression spring arranged between the upper tray and the lower tray.
The extensible dual-yielding anchor cable structure comprises an upper tray, a lower tray and a primary yielding structure, wherein the primary yielding structure comprises an energy absorption ball arranged between the upper tray and the lower tray.
According to the extendable double yielding anchor cable structure, the side, close to the fixed baffle, of the sliding ring is provided with the buffering ring.
As above, the extensible dual-yielding anchor cable structure further comprises a grouting channel for injecting cement into the anchor cable extension yielding energy absorption box, wherein the grouting channel comprises a grouting pipeline arranged in the second anchor cable and a slurry channel arranged in the connecting rod, the grouting channel is arranged in the closed baffle and is used for communicating the grouting pipeline with a seepage channel of the slurry channel, and the seepage channel is arranged on the connecting rod and communicated with a plurality of slurry outlet holes of the slurry channel.
As above-mentioned double pressure anchor rope structure that lets that can extend, anchor end includes a plurality of stirring blade discs, be equipped with the blade disc hole on the stirring blade disc.
The invention also discloses a use method of the stretchable double yielding anchor cable structure, which comprises the following steps:
s1, drilling, namely drilling the surrounding rock by using a drilling machine so as to place an anchoring agent at the bottom of an anchor hole after the anchor hole is formed;
s2, mounting, namely mounting an extensible dual-yielding anchor cable structure on the anchor hole, and fully mixing and bonding the anchoring end head with an anchoring agent;
s3, yielding, namely tensioning the second anchor cable until the primary yielding structure and the secondary yielding structure reach the required yielding degree;
and S4, grouting and solidifying, namely injecting high-strength quick-setting cement into the grouting channel, and filling the inside of the anchor cable stretching yielding energy absorption box and the closed area.
Compared with the prior art, the invention has the following advantages:
the invention provides an extensible dual-yielding anchor cable structure, which is characterized in that a first-stage yielding mechanism is used for respectively yielding a second anchor cable, and a second-stage yielding mechanism is used for yielding a first anchor cable, so that the tensile capacity of the first anchor cable and the second anchor cable is improved, and the problem that the anchor cable is easy to break due to large deformation of surrounding rock is solved.
The invention provides a use method of an extensible dual-yielding anchor cable structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of an anchor eye in an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is an enlarged schematic view of a first-stage yielding structure according to the present invention;
FIG. 4 is an enlarged schematic view of a secondary yielding structure according to the present invention;
FIG. 5 is a schematic view of the AA side of the secondary yielding structure in FIG. 4;
fig. 6 is a schematic view of a BB surface of the secondary yielding structure in fig. 4;
fig. 7 is a schematic view of a CC surface of the secondary yielding structure in fig. 4;
FIG. 8 is a schematic view of a surface DD of the secondary yielding structure shown in FIG. 4;
FIG. 9 is a schematic view showing the internal structure of the closing shutter in FIG. 4;
FIG. 10 is a schematic view of the anchor cable structure after yielding is completed according to the embodiment of the invention.
Detailed Description
In order to make the technical solutions and the advantages of the technical problems solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the terms are used for distinguishing only when they do express the ordinal order in context.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a dual pressure anchor rope structure that lets that can extend, includes the anchor end 1 that is used for fixing on the anchor eye end, locates the second grade in the anchor eye and lets the pressure structure 200, locates the one-level of anchor eye exit and lets the pressure structure 100, is used for connecting anchor end 1 with the second grade lets the first anchor rope 3 of pressure structure 200, and is used for connecting the second grade lets the pressure structure 200 with the second anchor rope 19 of the one-level structure 100 that lets, the second grade lets the pressure structure 200 be used for right first anchor rope 3 lets the pressure, the one-level lets the pressure structure 100 be used for right second anchor rope 19 lets the pressure.
The embodiment of the invention provides an extensible dual-yielding anchor cable structure, which is characterized in that a first-stage yielding mechanism is used for yielding a second anchor cable, a second-stage yielding mechanism is used for yielding a first anchor cable, the tensile capacity of the first anchor cable and the tensile capacity of the second anchor cable are improved, and the problem that the anchor cables are easy to break due to large deformation of surrounding rocks is solved.
Further, as a preferred embodiment of the present invention but not limited thereto, the secondary yielding structure 200 includes an anchor cable extending yielding energy-absorbing box 4 connected to the first anchor cable 3, a closure plate 18 disposed outside the anchor cable extending yielding energy-absorbing box 4 and connected to the second anchor cable 19, and a buffer mechanism 201 disposed between the anchor cable extending yielding energy-absorbing box 4 and the closure plate 18 and used for providing resistance when the two move relatively, wherein a closed area 32 is formed between the anchor cable extending yielding energy-absorbing box 4 and the closure plate 18 in the anchor hole.
The anchor cable is extended to let and presses the energy-absorbing box lead to and seal between the baffle and be connected through buffer gear, and buffer gear makes seal the baffle and can extend to let to press the energy-absorbing box lead to the removal relatively the anchor cable, just so can reach through indirect increase anchor cable length and let and press the effect, has solved the relatively poor defect of anchor cable structure extensibility to a certain extent, can adapt to the country rock characteristics in deep large deformation tunnel more.
Further, as a preferred embodiment of this scheme but not limiting, the anchor cable extends and lets pressure energy-absorbing box 4 include with anchor eye complex protective sleeve 41, locate in protective sleeve 41 and be used for with the solid fixed stop 15 that first anchor cable 3 is connected, locate damping slide rail 10 in protective sleeve 41, with the gliding slide damper 5 of damping slide rail 10 cooperation, buffer 201 is including being used for connecting slide damper 5 with the connecting rod 17 of closure flap 18, and both ends are connected respectively slide damper 5 with the solid fixed stop 13 of solid fixed stop 15, closure flap 18 drives when moving towards keeping away from protective sleeve 41 slide damper 5 is towards compressing the removal of solid fixed stop 13 direction.
When the second anchor rope is tensioned, the second anchor rope pulls the sealing baffle, the sealing baffle pulls the sliding baffle through the connecting rod, the sliding baffle moves to cause the baffle supporting spring to be compressed, and the baffle supporting spring buffers at the moment to provide a yielding function.
Further, as a preferred embodiment of the present solution but not limited thereto, the anchor cable stretching yielding energy-absorbing box 4 further includes a sliding ring 11 disposed between the sliding baffle 5 and the fixed baffle 15 and in sliding fit with the damping slide rail 10, and the buffering mechanism 201 further includes a buffering yielding spring 7 having two ends connected to the sliding baffle 5 and the sliding ring 11 respectively and surrounding the connecting rod 17.
When the second anchor cable is tensioned, the sliding baffle continuously moves until the sliding circular ring is pressed on the fixed baffle, and at the moment, the buffering yielding spring is compressed to provide secondary buffering and secondary yielding.
Further, as a preferred embodiment of the present invention but not limited thereto, the primary pressure-yielding structure 100 comprises a lower tray 23 and an upper tray 27 for pressing against the surrounding rock at the opening of the anchor hole, and a shock-absorbing compression spring 24 disposed between the upper tray 27 and the lower tray 23.
Further, as a preferred embodiment of the present disclosure, but not limited thereto, the primary crush structure 100 further includes an energy absorbing ball 25 disposed between the upper tray 27 and the lower tray 23.
Further, as a preferred embodiment of the present invention, but not limited thereto, a buffering ring 12 is provided on a side of the sliding ring 11 close to the fixed baffle 15.
Further, as a preferred embodiment of the present invention, but not limited thereto, the present invention further includes a grouting channel 300 for injecting cement into the anchor cable extension yielding energy absorption box 4, wherein the grouting channel 300 includes a grouting pipe 20 disposed in the second anchor cable 19, a grout channel 172 disposed in the connecting rod 17, a seepage channel 181 disposed in the closed baffle 18 and used for communicating the grouting pipe 20 with the grout channel 172, and a plurality of grout outlet holes 171 disposed on the connecting rod 17 and communicating the grout channel 172.
Further, as a preferred embodiment of the present solution but not limited thereto, the anchoring end 1 includes a plurality of agitator blades 1111, and the agitator blades 1111 are provided with blade holes 1112. The rear end of the anchoring end 1 is connected with the first anchor cable 3, four stirring cutter discs 1111 are arranged on the anchoring end 1, and each stirring cutter disc 1111 is provided with a cutter disc hole 1112 for increasing the contact area between the anchoring agent 2 and the anchoring end 1, so that the anchoring agent 2 and the anchoring end 1 are fully mixed and bonded.
The connecting rod is a deformed steel bar, the shock-absorbing compression spring is a high-strength shock-absorbing compression spring, the energy-absorbing ball is an elastic resin energy-absorbing ball, the protective sleeve is a metal protective sleeve, the sliding baffle is a high-damping sliding baffle, the damping slide rail is a closed annular damping slide rail, the sliding baffle is a high-damping sliding baffle, the sliding ring is a high-damping sliding ring, and the buffering ring is a buffering plastic ring.
The main structure of the invention comprises an anchoring end 1, a first anchor cable 3, an anchor cable stretching yielding energy-absorbing box 4, four threaded steel rods 17 arranged side by side, a closed baffle 18, a second anchor cable 19, a liquid silica gel cushion plate 22, a lower tray 23, four high-strength shock-absorbing compression springs 24, an elastic resin energy-absorbing ball 25, an energy-absorbing ball base 26, a truncated cone-shaped upper tray 27, an anchor cable lock 28 and an anchor cable grout-stopping plug 29.
The first anchor cable 3 is formed by winding seven high-strength solid steel stranded wires 31, the front end of the first anchor cable 3 is connected with the anchoring end head 1, and the rear end of the first anchor cable sequentially penetrates through a metal protective sleeve 41, a high-damping sliding baffle 5, a baffle supporting spring upper base 9 and a baffle supporting spring lower base 14 in the anchor cable stretching yielding energy absorption box 4 and is connected with a fixed baffle 15 at the rear end of the inner wall of the anchor cable stretching yielding energy absorption box 4.
The anchor cable stretching yielding energy absorption box 4 is a two-stage yielding structure in the invention and comprises a metal protective sleeve 41, a closed annular damping slide rail 10 positioned on the inner wall of the metal protective sleeve 41, a high-damping sliding baffle plate 5, four threaded steel rods 17, a high-damping sliding ring 11, a buffering plastic ring 12, a fixed baffle plate 15, a buffering plastic cushion plate 16, four buffering yielding springs 7 and a baffle plate supporting spring 13. The high-damping sliding baffle 5 is positioned at the front end of the closed annular damping slide rail 10, four buffering yielding spring upper bases 6 are arranged on the high-damping sliding baffle 5, and each buffering yielding spring upper base 6 is connected with a threaded steel rod 17 and a buffering yielding spring 7 surrounding the outer side of the threaded steel rod 17; the high-damping sliding ring 11 and the buffer plastic ring 12 are connected into a whole, and the front end of the high-damping sliding ring 11 is provided with four buffer yielding spring lower bases 8 and is connected with the rear ends of the buffer yielding springs 7; the fixed baffle 15 is positioned at the tail end of the closed annular damping slide rail 10 and is fixed on the inner wall of the metal protective sleeve 41, a baffle supporting spring lower base 14 is welded at the center part of the front end of the fixed baffle 15, a baffle supporting spring 13 on the baffle supporting spring lower base 14 surrounds the outer side of the first anchor cable 3 and is connected with a baffle supporting spring upper base 9 positioned at the center part of the high-damping slide baffle 5 through a buffer plastic ring 12 and a ring hole 111 in the high-damping slide ring 11 in sequence; the buffer plastic cushion plate 16 is located between the fixed baffle 15 and the rear end of the inner wall of the metal protective sleeve 41, and is used for making certain friction force generated when the threaded steel rod 17 slides out, so that mechanical damage caused by the fact that no buffer structure exists when the threaded steel rod 17 slides out is prevented.
The front ends of the four threaded steel rods 17 sequentially penetrate through the metal protective sleeve 41, the buffer plastic base plate 16, the fixed baffle 15, the buffer plastic ring 12, the high-damping sliding ring 11 and the lower buffer yielding spring base 8 and are finally connected with the upper buffer yielding spring base 6 on the high-damping sliding baffle 5; the screw-thread steel rod 17 is of a hollow structure, a slurry channel 172 is arranged in the screw-thread steel rod, a plurality of slurry outlet holes 171 are formed in the surface of the screw-thread steel rod, and the rear end of the screw-thread steel rod 17 is connected with the closed baffle 18.
The front end of the sealing baffle plate 18 is connected with the four threaded steel rods 17 in a welding mode, the rear end of the sealing baffle plate 18 is connected with the second anchor cable 19 in a welding mode, a seepage channel 181 is arranged in the sealing baffle plate 18, the seepage channel 181 is respectively connected with a slurry channel 172 in the threaded steel rods 17 and a grouting steel pipe 20 in the second anchor cable 19, and the caliber of the channels is consistent.
The second anchor cable 19 is actually a grouting anchor cable, and specifically comprises 6 solid steel strands 191 wound on the outer side of the grouting steel pipe 20, and the tail end of the second anchor cable 19 is provided with an anchor cable grout stop plug 29 for preventing grout from overflowing.
The liquid silica gel pad 22 is sleeved outside the second anchor cable 19, is positioned between the lower tray 23 and the surrounding rock 30 and clings to the surface of the surrounding rock 30; the lower tray 23 is positioned at the rear end of the liquid silica gel cushion plate 22 and is connected with the circular truncated cone-shaped upper tray 27 through four high-strength shock-absorbing compression springs 24; grooves 231 and 261 capable of containing small volume parts of elastic resin energy absorption balls 25 are arranged in the energy absorption ball base 26 welded at the front ends of the lower tray 23 and the circular truncated cone-shaped upper tray 27. Wherein, the lower tray 23, the high-strength shock-absorbing compression spring 24, the elastic resin energy-absorbing ball 25, the energy-absorbing ball base 26 and the truncated cone-shaped upper tray 27 jointly form a first-stage yielding structure in the invention.
In the extendable dual yielding anchor cable structure disclosed by the embodiment of the invention, the stiffness coefficient k of the high-strength shock-absorbing compression spring 24 1 The stiffness coefficient k of the flap support spring 13 2 Stiffness coefficient k of buffer yielding spring 7 3 The relationship between them is: k is a radical of 1 ＞k 2 ＞k 3 。
The embodiment also discloses a use method of the extendable double yielding anchor cable structure, which comprises the following steps:
s1, drilling, namely drilling a hole in the surrounding rock 30 by using a drilling machine so as to place an anchoring agent 2 at the bottom of an anchor hole 21 after the anchor hole is formed;
s2, mounting, namely mounting an extensible dual-yielding anchor cable structure on the anchor hole, and fully mixing and bonding the anchoring end head with an anchoring agent;
s3, yielding, namely stretching the second anchor cable until the primary yielding structure and the secondary yielding structure reach the required yielding degree;
and S4, grouting and solidifying, namely injecting high-strength quick-setting cement into the grouting channel, and filling the inside of the anchor cable stretching yielding energy absorption box and the closed area.
Further, as a preferred embodiment of the present solution, but not limited thereto, the step S2 includes the following steps:
s21, inserting the assembled anchoring end head, the first anchor cable, the secondary yielding structure and the second anchor cable into an anchor hole and rotating the anchor hole to fully mix and bond the anchoring end head 1 and the anchoring agent 2;
s22, after the anchoring agent 2 is solidified, sequentially filling the liquid silica gel cushion plate 22, the yielding tray combination (the lower tray 23, the high-strength shock-absorbing compression spring 24 and the truncated cone-shaped upper tray 27), the elastic resin energy-absorbing ball 25 and the anchor cable lock 28.
Further, as a preferred embodiment of the present solution, but not limited thereto, the step S3 includes the following steps:
s31, the second anchor cable 19 is tensioned and presses the truncated cone-shaped upper tray 27, and the high-strength shock-absorbing compression spring 24 is deformed to a small extent and transmits the pressing force to the lower tray 23.
S32, when the pretightening force is further increased, the high-strength shock-absorbing compression spring 24 further generates elastic deformation and reaches 1/4 of the elastic deformation limit. At the moment, the deformed steel bar 17 in the anchor cable stretching yielding energy absorption box 4 drives the high-damping sliding baffle 5 to slide along the closed annular damping slide rail 10, so that the baffle supporting spring 13 is compressed and deformed, and the deformation amount is 1/3 of the deformation limit; at this time, the anchor cable is extended to allow the buffering plastic ring 12 in the energy absorption box 4 to contact with the fixed baffle 15 without being extruded.
Further, as a preferred embodiment of the present solution, but not limited thereto, the step S4 includes the following steps:
s41, after the primary yielding structure and the secondary yielding structure yield to the required degree, injecting a certain amount of high-strength quick-setting cement 31 into the grouting steel pipe 20 in the second anchor cable 19 and plugging the grouting steel pipe into an anchor cable grout stop plug 29;
s42, enabling the high-strength quick-setting cement 31 to sequentially pass through the grouting steel pipe 20, the seepage channel 181 in the closed baffle 18 and the grout channel 172 in the deformed steel bar 17, and flow into the anchor cable stretching yielding energy absorption box 4 and the closed area 32 through a plurality of grout outlet holes 171 arranged on the surface of the deformed steel bar 17;
s43, solidifying the high-strength quick-setting cement to enable the anchor cable to extend and yield the pressure absorption box 4, the deformed steel bar 17 and the closed baffle 18 to be finally solidified into a whole.
The working principle of the embodiment is as follows:
when surrounding rock 30 deforms, the overall axial tension of the anchor cable structure is gradually increased, the surrounding rock 30 squeezes the liquid silica gel pad 22 and transmits the pressure of the surrounding rock to the lower tray 23, so that the high-strength shock-absorbing compression spring 24 is further compressed and reaches 1/2 of the compression deformation limit, at the moment, the front end of the elastic resin energy-absorbing ball 25 is embedded into the groove 231 on the lower tray 23, and the rear end of the elastic resin energy-absorbing ball is embedded into the groove 261 on the energy-absorbing ball base 26. With the increase of the deformation amount of the surrounding rock 30, the high-strength shock-absorbing compression spring 24 is further compressed and reaches 2/3 of the compression deformation limit thereof to absorb the deformation energy generated by the surrounding rock 30, and meanwhile, the elastic resin energy-absorbing ball 25 also absorbs part of the energy released due to the deformation of the surrounding rock 30 in a compressed mode, so that the first-stage yielding structure in the invention completes the yielding process in the first stage.
Along with the further increase of the axial tension of the integral structure of the anchor cable, the primary yielding structure gives way, and the anchor cable extends to give way to the pressure absorption box 4 to play a role of yielding. The anchor cable is extended to let the deformed steel bar 17 in the pressure absorption box 4 drive the high-damping sliding baffle 5 to slide, and is connected with the baffle supporting spring 13 and the buffering pressure-yielding spring 7 to move together, so that the high-damping sliding ring 11 and the buffering plastic ring 12 which are positioned at the rear end of the buffering pressure-yielding spring 7 are contacted and extruded with the fixed baffle 15, and at the moment, the baffle supporting spring 13 and the buffering pressure-yielding spring 7 generate elastic deformation due to further extrusion acting force, and absorb partial energy released when the surrounding rock 30 is further deformed. When the buffering yielding spring 7 and the baffle plate supporting spring 13 respectively reach 1/2 and 2/3 of the limit of the compression deformation, high-strength quick-setting cement 31 is injected to fill the inner part of the anchor cable stretching yielding energy absorption box 4 and the closed area 32 so as to be solidified into a whole, so that part of components of the anchor cable stretching yielding energy absorption box 4 are prevented from being damaged due to excessive yielding, the shear strength of a yielding structure is increased, and the integral structure still has enough supporting rigidity when the integral structure is coordinated with surrounding rocks to deform.
The foregoing is illustrative of embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms set forth herein. Similar to the structure of the method of the present application, or several technical deductions or substitutions made on the premise of the conception of the present application, should be regarded as the protection scope of the present application.
Claims (7)
1. The utility model provides a dual pressure anchor rope structure that lets that can extend which characterized in that: the anchor structure comprises an anchor end (1) used for being fixed on the tail end of an anchor hole, a secondary yielding structure (200) arranged in the anchor hole, a primary yielding structure (100) arranged at the outlet of the anchor hole, a first anchor cable (3) used for connecting the anchor end (1) with the secondary yielding structure (200), and a second anchor cable (19) used for connecting the secondary yielding structure (200) with the primary yielding structure (100), wherein the secondary yielding structure (200) is used for yielding the first anchor cable (3), and the primary yielding structure (100) is used for yielding the second anchor cable (19);
the secondary yielding structure (200) comprises an anchor cable stretching yielding energy absorption box (4) connected with the first anchor cable (3), a sealing baffle plate (18) arranged outside the anchor cable stretching yielding energy absorption box (4) and connected with the second anchor cable (19), and a buffer mechanism (201) arranged between the anchor cable stretching yielding energy absorption box (4) and the sealing baffle plate (18) and used for providing resistance when the anchor cable stretching yielding energy absorption box and the sealing baffle plate move relatively, wherein a sealed area (32) is formed between the anchor cable stretching yielding energy absorption box (4) in the anchor hole and the sealing baffle plate (18);
the anchor cable stretching yielding energy absorption box (4) comprises a protective sleeve (41) matched with an anchor hole, a fixed baffle (15) arranged in the protective sleeve (41) and used for being connected with the first anchor cable (3), a damping slide rail (10) arranged in the protective sleeve (41), and a sliding baffle (5) matched with the damping slide rail (10) to slide, wherein the buffer mechanism (201) comprises a connecting rod (17) used for connecting the sliding baffle (5) with the closed baffle (18) and a baffle supporting spring (13) with two ends respectively connected with the sliding baffle (5) and the fixed baffle (15), and the closed baffle (18) drives the sliding baffle (5) to move towards the direction of compressing the baffle supporting spring (13) when moving towards the direction far away from the protective sleeve (41);
the anchor rope extends and lets presses energy-absorbing box (4) still including locating between slide damper (5) and fixed stop (15) and with damping slide rail (10) sliding fit's slip ring (11), buffer gear (201) still include both ends respectively with slide damper (5) with slip ring (11) are connected and are encircleed the buffering that connecting rod (17) set up lets pressure spring (7).
2. An extendable dual crush anchor cable construction according to claim 1, wherein: one-level lets presses structure (100) including being used for the top to press lower tray (23) and last tray (27) on anchor eye opening part country rock, and locate go up tray (27) with shock attenuation compression spring (24) between lower tray (23).
3. An extendable dual-yield anchor cable structure according to claim 2, wherein: the primary yielding structure (100) further comprises an energy absorption ball (25) arranged between the upper tray (27) and the lower tray (23).
4. An extendable dual-yield anchor cable structure according to claim 1, wherein: and a buffering circular ring (12) is arranged on one side of the sliding circular ring (11) close to the fixed baffle (15).
5. An extendable dual-yield anchor cable structure according to claim 1, wherein: still including being used for toward slip casting passageway (300) of pouring into cement in anchor rope extension lets presses energy-absorbing box (4), slip casting passageway (300) is including locating slip casting pipeline (20) in second anchor rope (19) locate thick liquid passageway (172) in connecting rod (17) are located in closure flap (18) and be used for the intercommunication slip casting pipeline (20) with seepage flow channel (181) of thick liquid passageway (172) and locate on connecting rod (17) and communicate through a plurality of grout outlet (171) of thick liquid passageway (172).
6. An extendable dual-yield anchor cable structure according to claim 2, wherein: anchor end (1) includes a plurality of stirring blade disc (1111), be equipped with blade disc hole (1112) on stirring blade disc (1111).
7. A use method of an extensible double-yielding anchor cable structure is characterized by comprising the following steps:
s1, drilling, namely drilling surrounding rocks by using a drilling machine to form anchor holes, and then placing an anchoring agent at the bottoms of the anchor holes;
s2, mounting, namely mounting an extensible double-yielding anchor cable structure on the anchor hole, and fully mixing and bonding the anchoring end head and the anchoring agent;
s3, yielding, namely stretching the second anchor cable until the primary yielding structure and the secondary yielding structure reach the required yielding degree;
s4, grouting and solidifying, namely injecting high-strength quick-setting cement into the grouting channel, and filling the inside of the anchor cable stretching yielding energy absorption box and the closed area;
the extensible dual-yielding anchor cable structure comprises an anchoring end (1) fixed at the tail end of an anchor hole, a secondary yielding structure (200) arranged in the anchor hole, a primary yielding structure (100) arranged at the outlet of the anchor hole, a first anchor cable (3) used for connecting the anchoring end (1) with the secondary yielding structure (200), and a second anchor cable (19) used for connecting the secondary yielding structure (200) with the primary yielding structure (100), wherein the secondary yielding structure (200) is used for yielding the first anchor cable (3), and the primary yielding structure (100) is used for yielding the second anchor cable (19);
the secondary yielding structure (200) comprises an anchor cable stretching yielding energy absorption box (4) connected with the first anchor cable (3), a sealing baffle plate (18) arranged outside the anchor cable stretching yielding energy absorption box (4) and connected with the second anchor cable (19), and a buffer mechanism (201) arranged between the anchor cable stretching yielding energy absorption box (4) and the sealing baffle plate (18) and used for providing resistance when the anchor cable stretching yielding energy absorption box and the sealing baffle plate move relatively, wherein a sealed area (32) is formed between the anchor cable stretching yielding energy absorption box (4) in the anchor hole and the sealing baffle plate (18);
the anchor cable stretching yielding energy absorption box (4) comprises a protective sleeve (41) matched with an anchor hole, a fixed baffle (15) arranged in the protective sleeve (41) and used for being connected with the first anchor cable (3), a damping slide rail (10) arranged in the protective sleeve (41), and a sliding baffle (5) matched with the damping slide rail (10) to slide, wherein the buffer mechanism (201) comprises a connecting rod (17) used for connecting the sliding baffle (5) with the closed baffle (18) and a baffle supporting spring (13) with two ends respectively connected with the sliding baffle (5) and the fixed baffle (15), and the closed baffle (18) drives the sliding baffle (5) to move towards the direction compressing the baffle supporting spring (13) when moving towards the direction far away from the protective sleeve (41);
the anchor cable stretching yielding energy absorption box (4) further comprises a sliding ring (11) which is arranged between the sliding baffle (5) and the fixed baffle (15) and is in sliding fit with the damping slide rail (10), and the buffer mechanism (201) further comprises a buffer yielding spring (7) of which two ends are respectively connected with the sliding baffle (5) and the sliding ring (11) and are arranged around the connecting rod (17);
the utility model provides a dual pressure anchor rope structure of letting extend still includes and is used for toward slip casting passageway (300) of pouring into cement in anchor rope extension lets pressure energy-absorbing box (4), slip casting passageway (300) are including locating slip casting pipeline (20) in second anchor rope (19) locate grout passageway (172) in connecting rod (17) are located in closure flap (18) and be used for the intercommunication slip casting pipeline (20) with seepage flow channel (181) of grout passageway (172), and locate on connecting rod (17) and communicate through a plurality of grout outlet (171) of grout passageway (172).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110285190.6A CN113047879B (en) | 2021-03-17 | 2021-03-17 | Extendable double-yielding anchor cable structure and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110285190.6A CN113047879B (en) | 2021-03-17 | 2021-03-17 | Extendable double-yielding anchor cable structure and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113047879A CN113047879A (en) | 2021-06-29 |
| CN113047879B true CN113047879B (en) | 2023-03-17 |
Family
ID=76512926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110285190.6A Active CN113047879B (en) | 2021-03-17 | 2021-03-17 | Extendable double-yielding anchor cable structure and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113047879B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114517702B (en) * | 2022-02-23 | 2023-01-20 | 中国矿业大学 | Circulating type energy-absorbing yielding large-deformation anchoring device and using method thereof |
| CN114352330B (en) * | 2022-03-18 | 2022-06-10 | 应急管理部国家自然灾害防治研究院 | A slip casting strut anchor rope equipment for preventing earthquake is strikeed to tunnel |
| CN116838396B (en) * | 2023-08-30 | 2023-11-07 | 北京科技大学 | Grouting supporting flexible anchor cable equipment for explosion-proof and impact-proof of high-gas mine tunnel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227967A (en) * | 2017-07-10 | 2017-10-03 | 中国矿业大学 | A kind of constant resistance and large deformation pressure-relieving achor bar or anchor cable |
| CN109538266B (en) * | 2019-01-25 | 2023-10-03 | 中国矿业大学 | Flexible anchor rod |
| CN209654064U (en) * | 2019-03-07 | 2019-11-19 | 湖南科技大学 | A kind of pressure-relieving achor bar for deep roadway with large deformation surrounding rock supporting |
| CN211448692U (en) * | 2019-12-09 | 2020-09-08 | 中交第一公路勘察设计研究院有限公司 | Multistage anti supporting construction that lets of high ground stress soft rock large deformation tunnel |
| CN111425231B (en) * | 2020-03-31 | 2021-03-26 | 中国矿业大学 | Long and short anchor cable coordinated energy absorption yielding device and construction method |
-
2021
- 2021-03-17 CN CN202110285190.6A patent/CN113047879B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113047879A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113047879B (en) | Extendable double-yielding anchor cable structure and use method thereof | |
| JP6915931B2 (en) | Tension / compression combination type yield energy absorption grout anchor and its working method to be applied to large deformation of surrounding rocks | |
| CN111456779B (en) | Impact-resistant energy-absorbing yielding anchor cable anchoring device and method thereof | |
| CN205422779U (en) | Side direction supports and to let pressure formula slip casting stock | |
| CN109356629A (en) | A kind of application method of large deformation release shock resistance anchor pole | |
| CN109184765A (en) | A kind of stable state allow pressure release can detachable hydraulic anchor pole and its method for protecting support | |
| CN203669901U (en) | Mining telescopic energy absorption and scour prevention viscous damping anchor rod | |
| CN109577325A (en) | A kind of pressure-bearing type expansion body anti-float anchor rod with the connection of intracapsular tree root shape | |
| CN109899097B (en) | Mechanical linkage anti-pulling anchor rod | |
| CN113250723A (en) | Monitoring and coupling integrated protection device for rock burst of deep mine | |
| CN113153394A (en) | Self-expansion reinforced anchoring type anchor rod structure and method for narrow coal pillar along hollow crossheading end | |
| CN113027503A (en) | Movable device for filling non-Newtonian fluid to resist impact force and construction method | |
| CN210396775U (en) | Yielding anchor rod capable of self-recovering deformation | |
| CN112282808A (en) | Large-mining-height rib-caving-prevention anchoring coal top injection device and using method thereof | |
| CN215518749U (en) | Extensible dual-yielding anchor cable structure | |
| CN212535724U (en) | Anchor rod locking device convenient to install and fix | |
| CN114352331A (en) | Anti-integrated energy-absorbing impact-resistant anchor rod and impact resistance method thereof | |
| CN110424388B (en) | Shock-resistant modular anchoring device | |
| CN114517702B (en) | Circulating type energy-absorbing yielding large-deformation anchoring device and using method thereof | |
| KR101449560B1 (en) | Sealing type land pressing plate and slope stabilization method using the same | |
| CN216588673U (en) | Anchoring and grouting double-sample anchor rod | |
| CN113236322A (en) | Sectional pressure relief type anchor rod supporting structure | |
| CN113914381A (en) | Shock insulation structure for immersed tube tunnel segment joint and construction method thereof | |
| CN202900297U (en) | Hollow grouting yielding anchor rod | |
| CN218373832U (en) | Sectional reaming pressure type anchor cable structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |