CN116220771A - Unidirectional non-return prestressed anchor head and application method thereof - Google Patents
Unidirectional non-return prestressed anchor head and application method thereof Download PDFInfo
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- CN116220771A CN116220771A CN202310073792.4A CN202310073792A CN116220771A CN 116220771 A CN116220771 A CN 116220771A CN 202310073792 A CN202310073792 A CN 202310073792A CN 116220771 A CN116220771 A CN 116220771A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 42
- 230000001502 supplementing effect Effects 0.000 claims abstract description 6
- 238000004873 anchoring Methods 0.000 claims description 13
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 11
- 238000010257 thawing Methods 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 6
- 239000000806 elastomer Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000005422 blasting Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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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
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The embodiment of the application discloses one-way non-return prestressed anchor head and a using method thereof, wherein an anchor disc is used for being connected with one end of an anchor rope, a stress compensation device is connected with the anchor disc and used for supplementing the stress of the anchor rope, the number of one-way non-return parts is consistent with that of first elastic bodies, the stress compensation device is connected with the anchor disc through the one-way non-return parts, after the installation connection work is completed, the anchor rope is subjected to the required prestress, the stress compensation device locks the anchor disc, at the moment, elastic bodies in the stress compensation device are compressed to be the shortest, when the stress of the anchor rope is reduced, the stress compensation device is stretched under the elastic force of the first elastic bodies, so that the anchor rope is stretched and deformed, and when the tension of the anchor rope is increased, the stress compensation device is prevented from compressing due to the one-way non-return parts, and the additional rock mass expansion force does not cause the compression deformation of the first elastic bodies, so that the prestress of the anchor rope is reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of mining engineering, in particular to a unidirectional non-return prestressed anchor head and a use method thereof.
Background
Under the long-term influence of external conditions such as rock mass deformation, temperature change, blasting vibration and the like, the anchoring force of the traditional prestressed anchor cable is generally gradually reduced, so that the anchoring effect is influenced. In particular to the rock side slope of the strip mine in the alpine region of China, under the coupling action condition of freeze thawing cycle and blasting vibration throughout the year, the internal joint frost heaving action, mining blasting dynamic load, rock creep action and the like of the rock in the alpine region can lead to the reduction of the prestress of the anchor cable and even the failure of anchoring, thereby inducing disasters such as landslide and the like. The prestressed anchorage cable process has been developed and applied for decades, and many scholars and engineers have studied and improved it. For the problem of anchor cable prestress loss caused by loosening of the steel stranded wires, the existing solution is to perform overstretching and secondary tensioning on the anchor cable, namely, compensate the anchor cable prestress loss in a mode of improving the initial tension or performing secondary work on the anchor cable. Both of these approaches have inherent drawbacks: the requirements of the initial tension of the anchor cable on the strength of the anchor cable and the strength of the anchoring section are high, so that the construction cost is greatly increased; the secondary tensioning generally cannot realize timely stress compensation, the construction period is prolonged, and the secondary tensioning of the anchor cable is dangerous to a certain extent in the areas with steep anchoring positions and difficult arrival of personnel.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the present invention provides a one-way non-return pre-stressed anchor head.
A second aspect of the invention provides a method of use.
In view of this, there is provided according to a first aspect of an embodiment of the present application a one-way non-return pre-stressed anchor head comprising:
the anchor disc is used for connecting one end of the anchor cable;
the stress compensation device is connected to the anchor disc and used for supplementing the stress of the anchor cable;
the stress compensation device comprises a plurality of first elastic bodies;
the number of the unidirectional check pieces corresponds to that of the first elastic bodies, and the stress compensation device is connected with the anchor disc through the unidirectional check pieces.
In one possible embodiment, the anchor disc comprises:
the one-way non-return piece is arranged on one side of the top plate, which is far away from the slope rock mass to be fixed;
the first positioning holes are formed in the top disc in a central symmetry mode, and the number of the first positioning holes corresponds to that of the unidirectional non-return pieces;
the positions of the plurality of one-way check pieces correspond to the plurality of first positioning holes respectively.
In a possible embodiment, the anchor disc further comprises:
the first positioning piece is arranged at the center of the top disc and is used for fixedly connecting one end of the anchor cable, which is far away from the slope rock mass;
the second locating holes are formed in the first locating piece, and the number of the second locating holes corresponds to the number of the units of the anchor cable.
In a possible embodiment, the stress compensation means further comprises:
the ball screw comprises screws and screw nuts, and the number of the ball screws corresponds to that of the first positioning holes;
one end of the screw rod passes through the corresponding first positioning hole and can be connected with the corresponding one-way check piece in a one-way rotation way;
the other end of the screw rod is fixedly connected with a side slope rock mass to be fixed;
the screw rod nut is rotatably connected with the screw rod, and is arranged between the slope rock mass to be fixed and the one-way non-return piece;
the first elastic body is arranged between the slope rock mass to be fixed and the screw nut, and is sleeved on the screw rod.
In a possible embodiment, the stress compensation means further comprises:
the chassis is fixedly connected between the Bian Yanpo body and the screw rod;
the second locating piece is fixedly connected between the screw rod and the bottom plate.
In a possible embodiment, the stress compensation means further comprises:
the third locating piece is arranged at the center of the chassis and is used for being connected with the anchor cable in a sliding mode.
In a possible embodiment, the stress compensation means further comprises:
the input end of the stress monitoring device is arranged between the chassis and the slope rock mass.
In a possible embodiment, the stress compensation means further comprises:
the second elastic body is arranged between the top disc and the bottom disc, and the second elastic body is sleeved outside the anchor cable.
In a possible embodiment, the stress compensation means further comprises:
the telescopic sleeve is arranged between the top disc and the bottom disc, and is sleeved outside the first elastic body and the second elastic body.
According to a second aspect of embodiments of the present application, there is provided a method of use, including:
connecting the free end of the anchor cable after anchoring into a unidirectional non-return prestress anchor head in series;
connecting the anchor cable with the anchor disc;
sequentially applying drawing force to each unit anchor cable;
a compressive stress compensation device;
secondarily applying drawing force to each unit anchor cable;
the first elastic body releases pressure when the tension of the anchor cable is reduced, so that the anchor cable is stretched and deformed, and the unidirectional non-return piece prevents the first elastic body from releasing pressure when the tension of the anchor cable is increased.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the unidirectional non-return prestressed anchor head provided by the embodiment of the application comprises an anchor disc, a stress compensation device and unidirectional non-return pieces, wherein the anchor disc is used for connecting one end of an anchor rope, the stress compensation device is connected with the anchor disc and used for supplementing the stress of the anchor rope, the number of the unidirectional non-return pieces is consistent with that of the first elastic bodies, the stress compensation device is connected with the anchor disc through the unidirectional non-return pieces, in the concrete use process, an anchor hole is firstly formed in a slope rock body, one end of the anchor rope is made to penetrate into the anchor hole, then grouting is carried out on an anchor section, after the strength of the anchor section reaches the standard, the free end of the anchor rope exposed out of the anchor hole is connected with the stress compensation device and the anchor disc in series, the anchor rope penetrates through the middle of the anchor disc, a jack is used for sequentially applying drawing force to the anchor rope after the installation and connection work is completed, so that the prestress of the anchor rope reaches a target value, then the anchor rope is locked with the anchor disc after the needed prestress is applied, at the moment, the elastic body in the stress compensation device is compressed to the shortest, the elasticity of the first elastic body and the anchor disc pressure (namely the anchor rope tension) which the elastic body resists reach balance, when the anchor rope is reduced due to factors such as the internal joint frost heave effect, the mining blasting dynamic load, the rock creep effect and the like of the rock mass in the alpine region, the stress compensation device can stretch and release the elasticity of the first elastic body to lead the anchor rope to be elongated and deformed, the tensile force of the anchor rope is supplemented, when the frost heave deformation occurs to the rock mass of the slope under the frost heave effect, the stress compensation device is prevented from further compression due to the unidirectional check piece, the additional rock mass frost heave force can not lead the compression deformation of the first elastic body to further reduce the anchor rope prestress, and the prestress compensation mode of simply storing elasticity energy is compared with the overstretching and the like, the invention greatly reduces the requirements on the strength of the anchor cable and the strength of the anchoring section, fundamentally avoids the condition that the prestress of the cold region frozen-thawing rock mass is greatly reduced under the periodical freezing-thawing circulation effect, and compared with the secondary tensioning mode of the anchor cable prestress, the device provided by the invention is simple to operate and only needs one-time installation and construction, the cost is greatly reduced, the invention not only reduces the influence of the freezing-thawing effect in the alpine region on the prestress of the anchor cable, but also utilizes the periodical frost-thawing force of the cold region jointed rock mass to carry out secondary stress compensation and change the damage into treasures, so that the reliability, the economy, the durability and the like of the prestress anchor cable in the cold region frozen-thawing rock-soil slope anchoring engineering are improved, and the actual engineering requirements are met.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a block diagram of one-way backstop prestressed anchor head according to one embodiment of the present application;
FIG. 2 is a block diagram of a first positioning member according to one embodiment of the present application;
FIG. 3 is a schematic illustration of an application of a one-way backstop pre-stressed anchor head according to one embodiment provided herein;
fig. 4 is a schematic step flow diagram of a method of use of an embodiment provided herein.
The correspondence between the reference numerals and the component names in fig. 1-2 is:
100. an anchor disc; 200. a stress compensation device; 300. a one-way check member;
110. a top plate; 120. a first positioning hole; 130. a first positioning member; 140. a second positioning hole;
210. a first elastomer; 220. a ball screw; 230. a chassis; 240. a second positioning member; 250. a third positioning member; 260. and a second elastomer.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1-3, according to a first aspect of an embodiment of the present application, there is provided a unidirectional non-return prestressed anchor head device, including: the anchor disc 100, the anchor disc 100 is used for connecting one end of the anchor cable; the stress compensation device 200 is connected to the anchor disc 100 and is used for supplementing the stress of the anchor cable; the stress compensation means 200 comprises a number of first elastic bodies 210; the number of the one-way check members 300 corresponds to that of the first elastic body 210, and the stress compensating means 200 is connected to the anchor disc 100 through the one-way check members 300.
The unidirectional stress-stopping prestress anchor head provided by the embodiment of the application comprises an anchor disc 100, a stress compensation device 200 and a unidirectional stress-stopping piece 300, wherein the anchor disc 100 is used for connecting one end of an anchor rope, the stress compensation device 200 is connected to the anchor disc 100 and used for supplementing the stress of the anchor rope, the number of the unidirectional stress-stopping pieces 300 is consistent with that of the first elastic bodies 210, the stress compensation device 200 is connected with the anchor disc 100 through the unidirectional stress-stopping piece 300, in the concrete use process, firstly, an anchor hole is formed in a slope rock body, one end of the anchor rope is penetrated into the anchor hole, then the anchor section is grouted, after the strength of the anchor section reaches the standard, the free end of the anchor rope exposed out of the anchor hole is connected with the stress compensation device 200 and the anchor disc 100 in series, the anchor rope passes through the middle of the anchor disc 100, after the installation connection work is completed, a jack is used for sequentially applying a drawing force to the anchor rope, the pre-stress of the anchor cable reaches the target value, the anchor cable is locked with the anchor disc 100 after the required pre-stress is applied to the anchor cable, at this time, the elastic body in the stress compensation device 200 is compressed to the shortest, the elastic force of the first elastic body 210 and the pressure of the anchor disc 100 (namely the anchor cable tension) which resists the elastic body reach balance, when the anchor cable is reduced by the factors such as the joint frost heave effect, the mining blasting dynamic load, the rock creep effect and the like in the rock mass in the alpine region, the stress compensation device 200 can stretch and release the elastic force of the first elastic body 210 to stretch and deform the anchor cable to supplement the tensile force of the anchor cable, and when the frost heave effect occurs to the slope rock mass, the stress compensation device 200 is prevented from further compression by the unidirectional check piece, the additional rock mass frost heave force does not cause the compression deformation of the first elastic body 210 to further reduce the anchor cable pre-stress, compared with the pre-stress compensation mode of simply storing elastic energy such as overstretching, the invention greatly reduces the requirements on the strength of the anchor cable and the strength of the anchoring section, fundamentally avoids the condition that the pre-stress of the cold region freeze-thawing rock mass is greatly reduced under the periodical freeze-thawing circulation effect, and compared with the secondary tensioning mode of the anchor cable pre-stress, the device provided by the invention is simple to operate, only needs to be installed and constructed once, and greatly reduces the cost.
As shown in fig. 1-3, anchor disc 100 includes: the top plate 110, the unidirectional non-return element 300 is arranged on one side of the top plate 110 away from the slope rock mass to be fixed; the number of the first positioning holes 120 corresponds to that of the unidirectional non-return pieces 300, and a plurality of the first positioning holes 120 are formed in the top plate 110 in a central symmetry manner; the positions of the plurality of one-way check members 300 correspond to the plurality of first positioning holes 120, respectively.
In this technical solution, the anchor disc 100 includes a top disc 110 and a first positioning hole 120, wherein a unidirectional non-return element 300 is disposed on a side of the top disc 110 away from a slope rock mass to be fixed; the number of the first positioning holes 120 corresponds to that of the unidirectional check pieces 300, a plurality of first positioning holes 120 are formed in the top plate 110 in a central symmetry manner, the unidirectional check pieces 300 are arranged at the positions of the first positioning holes 120, the parts, connected with the anchor plate 100, of the stress compensation device 200 penetrate through the top plate 110 through the first positioning holes 120, meanwhile, the connecting pieces penetrate through the unidirectional check pieces 300 and can be connected with the unidirectional check pieces 300 in a unidirectional rotation manner, and therefore the unidirectional check function of the prestress anchor head is achieved.
As shown in fig. 1-3, anchor disc 100 further includes: the first positioning piece 130 is arranged at the center of the top plate 110, and the first positioning piece 130 is used for fixedly connecting one end of the anchor cable far away from the slope rock mass; the second positioning holes 140, the second positioning holes 140 are formed in the first positioning piece 130, and the number of the second positioning holes 140 corresponds to the number of the units of the anchor cable.
In the technical scheme, the pressure dispersion type anchor cable is adopted and consists of a plurality of unit anchor cables, each unit anchor cable is respectively formed by two unbonded steel strands anchored in a steel supporting body, the steel strands are symmetrically anchored on the steel supporting body through compression springs and compression sleeves, the anchor cable of each unit extends into a second positioning hole 140 respectively, after the drawing operation of the anchor cable is finished, the anchor cable and a first positioning piece 130 are fixedly connected, and the anchor cable and a top disc 110 are connected through the first positioning piece 130, so that the positioning of the free section of the anchor cable is realized.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the ball screw 220, the ball screw 220 includes a screw and a screw nut, the number of the ball screw 220 corresponds to the first positioning hole 120; one end of the screw rod passes through the corresponding first positioning hole 120 and is connected with the corresponding one-way check member 300 in a one-way rotation manner; the other end of the screw rod is fixedly connected with the side slope rock mass to be fixed; the screw nut is rotatably connected with the screw rod and is arranged between the slope rock mass to be fixed and the one-way check piece 300; the first elastic body 210 is arranged between the slope rock mass to be fixed and the screw nut, and the first elastic body 210 is sleeved outside the screw.
In this technical scheme, the stress compensation device 200 further includes a ball screw 220, the ball screw 220 includes a screw and a screw nut, where the screw is a connecting piece of the stress compensation piece and the top disc 110, one end of the screw passes through the first positioning hole 120 respectively and can be connected to the unidirectional check piece in a unidirectional rotation way, the screw nut is disposed on the screw, the first elastic body 210 is disposed between the screw nut and the slope rock, when the stress of the anchor cable decreases, the tension of the anchor cable to the top disc 110 decreases, the elasticity of the first elastic body 210 and the tension of the anchor cable lose balance, the elasticity of the first elastic body 210 acts on the screw nut, the screw nut drives the screw to rotate, the screw drives the anchor disc 100 to elongate and deform the anchor cable, thereby realizing that the anchor cable supplements the tensile force, when the stress of the anchor cable increases, the anchor disc 100 squeezes the ball nut, and the screw cannot rotate in the opposite direction due to the limit of the unidirectional check piece, so as to realize the function that the anchor head cannot be deformed by extrusion.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the chassis 230, the chassis 230 is fixedly connected between the Bian Yanpo body and the screw; the second positioning piece 240, the second positioning piece 240 is fixedly connected between the screw and the bottom plate.
In this technical scheme, stress compensation device 200 still includes chassis 230, is equipped with second setting element 240 on the chassis 230, and in practical application in-process, chassis 230 hugs closely the side slope rock mass, compares the screw rod direct with side slope rock mass contact, adds chassis 230 and can make this embodiment more stable, adopts second setting element 240 to connect screw rod and chassis 230 simultaneously, avoids anchor head in-process of use, and the screw rod to take place the skew because of reasons such as extrusion, improves the stability of this embodiment.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the third positioning piece 250, the third positioning piece 250 is arranged at the center of the chassis 230, and the third positioning piece 250 is used for being connected with the anchor cable in a sliding way.
In this technical solution, the third positioning member 250 is used for slidably connecting the anchor cable, and limits the anchor cable of each unit while avoiding locking the exposed section of the anchor cable, so as to avoid the anchor cable from being deviated or loose.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the input end of the stress monitoring device is arranged between the chassis 230 and the side slope rock mass.
In this technical scheme, add stress monitoring device, stress monitoring device's input sets up in chassis 230 between the side slope rock mass, is the anchor rope to the pulling force of side slope rock mass promptly, and when stress monitoring device survey numerical value was less than the threshold value, and can inspect maintenance to this anchor head, and this stress monitoring device has reduced the corresponding time of anchor head trouble on the one hand, on the other hand can omit the inspection to the anchor head that monitors the numerical value normal when regularly patrolling and examining, practices thrift the manpower.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the second elastic body 260, the second elastic body 260 is disposed between the top plate 110 and the bottom plate 230, and the second elastic body 260 is sleeved outside the anchor cable.
In this technical solution, the second elastic bottom is sleeved on the anchor cable, so as to further enhance the compensation effect of the stress compensation device 200 and improve the usability of the embodiment of the application.
As shown in fig. 1-3, the stress compensation device 200 further comprises: the telescopic sleeve is arranged between the top plate 110 and the bottom plate 230, and is sleeved outside the first elastic body 210 and the second elastic body 260.
In this technical solution, the stress compensation device 200 is additionally provided with a telescopic sleeve, the telescopic sleeve is sleeved on the first elastic body 210 and the second elastic body 260, the telescopic sleeve can avoid the first elastic body 210 and the second elastic body 260 from shifting when the stress compensation device 200 is extruded, and meanwhile, the first elastic body 210 and the second elastic body 260 can be protected, and corrosion and abrasion of the first elastic body 210 and the second elastic body 260 can be delayed.
As shown in fig. 4, a second aspect of the embodiment of the present application proposes a use method, applied to any one of the above-mentioned unidirectional non-return prestressed anchor heads, including:
step 101: connecting the free end of the anchor cable after anchoring into a unidirectional non-return prestress anchor head in series;
step 102: connecting the anchor cable with the anchor disc;
step 103: sequentially applying drawing force to each unit anchor cable;
step 104: a compressive stress compensation device;
step 105: secondarily applying drawing force to each unit anchor cable;
step 106: the first elastic body releases pressure when the tension of the anchor cable is reduced, so that the anchor cable is stretched and deformed, and the unidirectional non-return piece prevents the first elastic body from releasing pressure when the tension of the anchor cable is increased.
According to the second aspect of the embodiment of the application, a use method is provided, in a specific operation process, firstly, after the anchoring section at the bottom of an anchoring hole meets the strength requirement and before the anchor cable is subjected to prestress, a unidirectional non-return prestress anchor head device is connected in series to the free end of the anchor cable, the limit bolts at the outer sides of the unidirectional non-return parts of the anchor disc are not screwed in place, a jack is used for sequentially applying a drawing force to the anchor cable, so that the anchor cable reaches a target value, at the moment, a first elastomer in the stress compensation device is compressed to the shortest, elastic potential energy stored in the first elastomer reaches the maximum value, the elasticity of the first elastomer and the anchor disc pressure (namely the anchor cable tension) resisted by the first elastomer are balanced, the prestress of the anchor cable is hardly lost in the process of the compression stress compensation device, so that the anchor cable is secondarily applied with the drawing force after the compression stress compensation device is completed, the anchor cable is installed in place synchronously, at the moment, the total elongation of the stress compensation device is zero, and if the anchor cable prestress of the anchor cable is reduced, the stress compensation device releases elastic potential energy to the elongation, and the tension of the anchor cable is increased.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A unidirectional non-return prestressed anchor head, comprising:
the anchor disc is used for connecting one end of the anchor cable;
the stress compensation device is connected to the anchor disc and used for supplementing the stress of the anchor cable;
the stress compensation device comprises a plurality of first elastic bodies;
the number of the unidirectional check pieces corresponds to that of the first elastic bodies, and the stress compensation device is connected with the anchor disc through the unidirectional check pieces.
2. The one-way non-return pre-stressed anchor head of claim 1, wherein the anchor disc comprises:
the one-way non-return piece is arranged on one side of the top plate, which is far away from the slope rock mass to be fixed;
the first positioning holes are formed in the top disc in a central symmetry mode, and the number of the first positioning holes corresponds to that of the unidirectional non-return pieces;
the positions of the plurality of one-way check pieces correspond to the plurality of first positioning holes respectively.
3. The one-way non-return pre-stressed anchor head of claim 2, wherein the anchor disc further comprises:
the first positioning piece is arranged at the center of the top disc and is used for fixedly connecting one end of the anchor cable, which is far away from the slope rock mass;
the second locating holes are formed in the first locating piece, and the number of the second locating holes corresponds to the number of the units of the anchor cable.
4. The one-way non-return pre-stressed anchor head of claim 2, wherein the stress compensation means further comprises:
the ball screw comprises screws and screw nuts, and the number of the ball screws corresponds to that of the first positioning holes;
one end of the screw rod passes through the corresponding first positioning hole and can be connected with the corresponding one-way check piece in a one-way rotation way;
the other end of the screw rod is fixedly connected with a side slope rock mass to be fixed;
the screw rod nut is rotatably connected with the screw rod, and is arranged between the slope rock mass to be fixed and the one-way non-return piece;
the first elastic body is arranged between the slope rock mass to be fixed and the screw nut, and is sleeved on the screw rod.
5. The one-way check pre-stressed anchor of claim 4, wherein the stress compensation means further comprises:
the chassis is fixedly connected between the Bian Yanpo body and the screw rod;
the second locating piece is fixedly connected between the screw rod and the bottom plate.
6. The one-way check pre-stressed anchor of claim 5, wherein the stress compensation means further comprises:
the third locating piece is arranged at the center of the chassis and is used for being connected with the anchor cable in a sliding mode.
7. The one-way check pre-stressed anchor of claim 5, wherein the stress compensation means further comprises:
the input end of the stress monitoring device is arranged between the chassis and the slope rock mass.
8. The one-way check pre-stressed anchor of claim 5, wherein the stress compensation means further comprises:
the second elastic body is arranged between the top disc and the bottom disc, and the second elastic body is sleeved outside the anchor cable.
9. The one-way non-return pre-stressed anchor head of claim 8, wherein the stress compensation means further comprises:
the telescopic sleeve is arranged between the top disc and the bottom disc, and is sleeved outside the first elastic body and the second elastic body.
10. A method of use applied to a one-way non-return pre-stressed anchor as claimed in any one of claims 1 to 9, comprising:
connecting the free end of the anchor cable after anchoring into a unidirectional non-return prestress anchor head in series;
connecting the anchor cable with the anchor disc;
sequentially applying drawing force to each unit anchor cable;
a compressive stress compensation device;
secondarily applying drawing force to each unit anchor cable;
the first elastic body releases pressure when the tension of the anchor cable is reduced, so that the anchor cable is stretched and deformed, and the unidirectional non-return piece prevents the first elastic body from releasing pressure when the tension of the anchor cable is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073792.4A CN116220771A (en) | 2023-02-03 | 2023-02-03 | Unidirectional non-return prestressed anchor head and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073792.4A CN116220771A (en) | 2023-02-03 | 2023-02-03 | Unidirectional non-return prestressed anchor head and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116220771A true CN116220771A (en) | 2023-06-06 |
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ID=86574322
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310073792.4A Pending CN116220771A (en) | 2023-02-03 | 2023-02-03 | Unidirectional non-return prestressed anchor head and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116220771A (en) |
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2023
- 2023-02-03 CN CN202310073792.4A patent/CN116220771A/en active Pending
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