CN116254832A - Prestressed anchor cable device and use method - Google Patents
Prestressed anchor cable device and use method Download PDFInfo
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- CN116254832A CN116254832A CN202310073773.1A CN202310073773A CN116254832A CN 116254832 A CN116254832 A CN 116254832A CN 202310073773 A CN202310073773 A CN 202310073773A CN 116254832 A CN116254832 A CN 116254832A
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- 238000004873 anchoring Methods 0.000 claims description 19
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- 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
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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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
Abstract
The embodiment of the application discloses a prestressed anchorage cable device and application method thereof, and the prestressed anchorage cable device provided by the embodiment of the application includes: the hydraulic expansion device comprises an anchor rope, a hydraulic expansion device and a stress compensation system, wherein one end of the anchor rope is fixed inside a side slope rock body, the hydraulic expansion device is connected to the other end of the fixed anchor rope, when the stress of the anchor rope is reduced, the internal hydraulic pressure of the hydraulic expansion device is reduced, the stress compensation system comprises hydraulic oil and a hydraulic energy accumulator, the hydraulic oil is arranged inside the hydraulic energy accumulator, the hydraulic energy accumulator is communicated with the hydraulic expansion device, and the hydraulic pressure of the hydraulic expansion device is positively correlated with the stress received by the anchor rope. In a specific application scene, the hydraulic expansion device is communicated with the stress compensation system, the stress compensation system is consistent with the internal hydraulic pressure of the hydraulic expansion device, and when the tension of the anchor cable is reduced, the stress compensation system can supplement oil pressure to the hydraulic expansion device through the hydraulic energy accumulator, so that the hydraulic expansion device is stretched and deformed, and the tension of the prestressed anchor cable is increased.
Description
Technical Field
The embodiment of the application relates to the technical field of mining engineering, in particular to a prestressed anchor cable device and a using method.
Background
In the field of geotechnical engineering, the reinforcement of a side slope by adopting the prestressed anchor cable is one of common and reliable reinforcement modes, the prestressed anchor cable has high flexibility and good shock resistance and ductility, and can deeply reinforce a rock-soil body, actively control the deformation of the rock body, adjust the stress state of the soil body and be beneficial to the stability of the rock body, so that the prestressed anchor cable has great significance on the stability and construction safety of the rock-soil side slope, however, under the long-term influence of external conditions such as rock deformation, temperature change, blasting vibration and the like, the anchoring force of the traditional prestressed anchor cable is reduced to a certain extent, and the anchoring effect is seriously influenced;
particularly for the slope of the strip mine in the alpine region of China, under the coupling action condition of freeze thawing cycle and blasting vibration, the slope rock mass anchored by the prestressed anchor cable is adopted, and the anchor cable prestress is reduced, even the anchor failure is caused due to the fact that the anchor cable is subjected to the action of joint frost heaving in the rock in the alpine region, the blasting dynamic load in the construction process, the creep action of the rock under the long-term anchoring and the like, so that disasters such as landslide and the like are induced, and at present, the problem of anchor cable prestress loss caused by the relaxation of steel strands is approximately divided into two types: the prestress loss of the anchor cable is compensated by means of overstretching or spring storage elastic energy storage and secondary acting, but the two modes have inherent defects: on the one hand, the elastic energy storage device has limited energy storage capacity, for example, the energy storage capacity is limited by the stroke of a second anchor disc spring at the anchor head, the anchoring force still has stress loss after a long time, and the energy is difficult to supplement; on the other hand, the secondary tensioning generally cannot achieve timely stress compensation, construction cost can be increased, and the secondary tensioning of the anchor cable in the area with steep anchoring position and difficult arrival of personnel has a certain degree of danger.
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 pre-stressed anchor line arrangement.
A second aspect of the invention provides a method of use.
In view of this, a first aspect according to an embodiment of the present application proposes a pre-stressed anchor cable device comprising:
one end of the anchor cable is used for being fixed in the slope rock mass;
the hydraulic expansion device is connected with the other end of the anchor cable;
the stress compensation system comprises hydraulic oil and a hydraulic accumulator, wherein the hydraulic oil is arranged in the hydraulic accumulator, and the hydraulic accumulator is communicated with the hydraulic telescopic device;
the hydraulic pressure of the hydraulic telescopic device is positively correlated with the stress born by the anchor cable.
In a possible embodiment, the hydraulic telescopic comprises:
the fixing part is used for clinging to the slope rock mass, and adopts a tubular structure with an opening at one side;
a moving part, wherein the moving part is hollow, is arranged in the fixed part and is connected with the fixed part in a sliding way;
one side of the moving part extends out of the fixing part through an opening on the fixing part;
an anchor cable hole is formed in one end, extending out of the fixed part, of the moving part;
and an anchor rope hole is formed in one end, close to the slope rock mass, of the fixing part.
In a possible embodiment, the hydraulic telescopic comprises:
an oil injection cavity, wherein the fixed part and the moving part are enclosed to form the oil injection cavity;
the oiling cavity is communicated with the stress compensation system.
In one possible embodiment, the cable comprises one or more cable lines, the cable line of each unit comprising a plurality of unbonded steel strands.
In a possible embodiment, the hydraulic telescopic further comprises:
the first anchor disc is arranged on one side of the moving part extending out of the fixed part, and a plurality of holes through which the anchor cables can pass are formed in the first anchor disc;
the fixing piece is fixedly connected to one end of the anchor rope penetrating through the first anchor disc.
In one possible embodiment, the hydraulic jack further comprises:
the second anchor disc is arranged between the fixed part and the slope rock body, and a plurality of holes through which the anchor cables can pass are formed in the second anchor disc.
In one possible embodiment, the stress compensation system further comprises:
the hydraulic servo valve is communicated with the hydraulic telescopic device;
one end of the conduit is communicated with the hydraulic valve, and the other end of the conduit is communicated with the hydraulic accumulator;
and the oil supply valve is arranged on the hydraulic energy accumulator.
In one possible embodiment, the stress compensation system further comprises:
and the pressure monitoring assembly is used for monitoring the pressure inside the hydraulic accumulator and the hydraulic telescopic device.
According to a second aspect of embodiments of the present application, a method of use is provided, comprising
The anchor cable is arranged on a side rock slope body to be fixed;
communicating the hydraulic jack with the stress compensation system;
the pressure of the hydraulic telescopic device and the pressure of the stress compensation system reach balance;
and controlling the hydraulic expansion device and the stress compensation system to carry out oil pressure change based on the tension change of the anchor cable.
In a possible embodiment, the pre-stressed anchor cable is arranged on a side rock slope to be fixed, and comprises:
an anchor hole is drilled, the anchor hole penetrates through the sliding surface of the Bian Yanpo body and extends into the stable rock mass;
one end of the anchor cable extends into the anchor hole, and the other end of the anchor cable penetrates through the hydraulic telescopic device and extends out of the hydraulic telescopic device;
grouting and reinforcing the anchoring holes;
and (5) applying prestress to the anchor cable.
Compared with the prior art, the invention at least comprises the following beneficial effects: the prestressed anchor cable device provided by the embodiment of the application comprises: the anchor cable, the hydraulic telescopic device and the stress compensation system are characterized in that one end of the anchor cable is used for extending into a side slope rock mass to be fixed, and concrete is poured to form an anchoring section and fixed with the rock mass. The hydraulic expansion device is connected to the other end of the fixed anchor cable, when the stress of the anchor cable is reduced, the internal hydraulic pressure of the hydraulic expansion device is reduced, the stress compensation system comprises hydraulic oil and a hydraulic energy accumulator, the hydraulic oil is arranged inside the hydraulic energy accumulator, the hydraulic energy accumulator is communicated with the hydraulic expansion device, and the hydraulic pressure of the hydraulic expansion device is positively correlated with the stress born by the anchor cable. In a specific application scene, the pre-stress anchor cable device is arranged on a rock-soil slope to be anchored, pre-stress is applied to the anchor cable, the surface mine slope in a alpine region in engineering is subjected to coupling action of freeze thawing cycle and blasting vibration throughout the year, and the pre-stress of the anchor cable is lost due to long-term influence of external conditions such as rock deformation, temperature change, blasting vibration and the like. In order to compensate the prestress loss of the anchor cable caused by the factors, firstly, geological survey and mechanical calculation or numerical simulation research are carried out on the side slope, and a side slope anchoring scheme is designed, wherein the side slope anchoring scheme comprises anchor cable reinforcing depth, anchoring section length, laying meshes and number, anchor cable model selection, single-hole anchor cable number determination, single Kong Maogu force determination and the like. Secondly, in the anchor cable installation process, anchor cables are installed in each anchor cable installation hole according to design requirements, the anchoring length is ensured, grouting is carried out on an anchoring section, and the rock surface at the orifice of the anchor cable hole is leveled, or a construction concrete base is prepared for subsequent installation and pre-stressing. And thirdly, after the strength of the anchoring section meets the design requirement, installing and applying prestress outside the slope, and sequentially penetrating the anchor cable through the anchor disc and the hydraulic telescopic device and out of the anchor head. Then, apply the pulling force to many anchor ropes sequentially with the jack, make its prestressing force all reach the target value, then apply the required prestressing force to the anchor rope and stretch into the one end of hydraulic jack to lock, ensure stretching locking back device gas tightness is good, at this moment, hydraulic jack displacement compression is the lowest, hydraulic jack is linked together with stress compensating system afterwards, stress compensating system keeps unanimous with hydraulic jack's inside hydraulic pressure, when the pulling force of anchor rope reduces, the withstanding that hydraulic jack received reduces, inside hydraulic pressure reduces, then stress compensating system accessible hydraulic accumulator supplements oil pressure for hydraulic jack, make its elongation deformation, increase the pulling force of prestressing force anchor rope, this application embodiment has realized the stress compensating function through hydraulic jack and stress compensating system, and the self-adaptation effect according to the thermal expansion and contraction effect under the temperature variation.
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 a pre-stressed anchor line device according to one embodiment of the present application;
fig. 2 is a schematic application scenario diagram of a prestressed anchor cable device according to an embodiment provided in the present application;
fig. 3 is an enlarged partial schematic view of a pre-stressed anchor line device according to one embodiment of the disclosure;
fig. 4 is a schematic step flow diagram of a method of controlling a pre-stressed anchor line device according to one embodiment provided herein;
fig. 5 is a schematic step flow diagram of the pre-stressed anchor cable according to an embodiment provided herein, being arranged on a side rock slope to be fixed.
The correspondence between the reference numerals and the component names in fig. 1 is:
100. an anchor cable; 200. a hydraulic retractor; 300. a stress compensation system;
210. a fixing part; 220. a moving part; 230. an oil filling cavity; 240. a first anchor disc; 250. a fixing member; 260. a second anchor disc;
310. hydraulic oil; 320. a hydraulic accumulator; 330. a hydraulic servo valve; 340. a conduit; 350. an oil supply valve.
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, a prestressed anchor cable device is provided, including: the anchor cable 100, one end of the anchor cable 100 is used for being fixed in the slope rock mass; a hydraulic retractor 200, wherein the hydraulic retractor 200 is connected to the other end of the anchor line 100; a stress compensation system 300, wherein the stress compensation system 300 comprises hydraulic oil 310 and a hydraulic accumulator 320, wherein the hydraulic oil 310 is arranged inside the hydraulic accumulator 320, and the hydraulic accumulator 320 is communicated with the hydraulic telescopic device 200; the hydraulic pressure of the hydraulic telescopic device 200 is positively correlated with the stress to which the anchor cable 100 is subjected.
The prestressed anchor cable device provided by the embodiment of the application comprises: the anchor cable 100, the hydraulic expansion device 200 and the stress compensation system 300, wherein one end of the anchor cable 100 is used for extending into a slope rock mass to be fixed, the hydraulic expansion device 200 is connected with the other end of the anchor cable 100, when the stress of the anchor cable 100 is reduced, the hydraulic pressure in the hydraulic expansion device 200 is reduced, the stress compensation system 300 comprises hydraulic oil 310 and a hydraulic energy accumulator 320, the hydraulic oil 310 is arranged in the hydraulic energy accumulator 320, the hydraulic energy accumulator 320 is communicated with the hydraulic expansion device 200, the hydraulic pressure of the hydraulic expansion device 200 is positively correlated with the stress suffered by the anchor cable 100, in a specific application scene, the prestress anchor cable device is arranged on a rock slope to be anchored, prestress is applied to the anchor cable 100, the anchor cable 100 is positioned on an open-pit slope in a high and cold area in engineering, the anchor cable 100 is in coupling effect of freeze thawing cycle and blasting vibration throughout the year, and loss is caused by long-term influence of external conditions such as rock mass deformation, temperature change and blasting vibration, in order to compensate the prestress loss of the anchor cable 100 caused by the factors, firstly, the position to be anchored and the depth thereof are calculated by geological survey of the side slope, then, the anchor cable 100 body is slowly put into the hole by adopting manpower, the length of the steel strand exposed outside the outlet of the steel ruler is calculated, the length of the anchor cable 100 in the hole (the error is controlled within 50 mm) is calculated, the anchoring length is ensured, the anchor cable 100 passes through the hydraulic expansion joint 200 and passes out of the hydraulic expansion joint 200 after the anchoring length is deeply finished, the hydraulic expansion joint 200 is fixedly connected with the side slope by adopting concrete, the anchoring section is grouted, the pulling force is applied to the anchor cable 100 by adopting a jack after the installation and connection work is finished, the prestress of the anchor cable 100 reaches the target value, and then, one end of the anchor cable 100 which stretches into the hydraulic expansion joint 200 is locked after the required prestress is applied to the anchor cable 100, the device after tensioning and locking is guaranteed to be good in air tightness, at the moment, the displacement of the hydraulic expansion joint 200 is compressed to the lowest, then the hydraulic expansion joint 200 is communicated with the stress compensation system 300, the stress compensation system 300 is consistent with the internal hydraulic pressure of the hydraulic expansion joint 200, when the tension of the anchor cable 100 is reduced, the resisting force borne by the hydraulic expansion joint 200 is reduced, the internal hydraulic pressure is reduced, the hydraulic expansion joint 200 can be supplemented with oil pressure through the hydraulic energy accumulator 320 by the stress compensation system 300, so that the hydraulic expansion joint 200 is subjected to elongation deformation, the tension of the prestressed anchor cable is increased, the prestress of the anchor cable 100 can be automatically compensated when the prestress of the anchor cable 100 is damaged under various engineering problems, the hydraulic expansion joint is particularly suitable for reinforcing the freeze-thawing rock-soil slope in alpine regions, the problem of secondary tensioning of the anchor cable 100 by personnel in the prior art is solved, and the potential safety hazards of the personnel in the construction process are reduced.
As shown in fig. 1-3, in some examples, the hydraulic jack 200 includes: a fixing portion 210, wherein one side of the fixing portion 210 is used for being clung to a slope rock mass, and the fixing portion 210 adopts a tubular structure with a single-side opening; a moving part 220, wherein the moving part 220 is hollow, the moving part 220 is arranged in the fixed part 210, and the moving part 220 is connected with the fixed part 210 in a sliding way; one side of the moving part 220 extends out of the fixing part 210 through an opening on the fixing part 210; one end of the moving part 220 extending out of the fixed part 210 is provided with an anchor cable 100 hole; and an anchor cable 100 hole is formed in one end, close to the slope rock mass, of the fixing part 210.
In this solution, the hydraulic jack 200 includes a fixing portion 210 and a moving portion 220, one side of the fixing portion 210 is used for being closely attached to a side rock slope, the moving portion 220 is slidably connected to the fixing portion 210, when the anchor cable 100 is fixed, one end of the anchor cable 100 passes through an anchor cable 100 hole of the fixing portion 210 and is movably connected with the anchor cable 100, one end of the anchor cable 100 passes through an anchor cable 100 hole of the moving portion 220 after passing through the fixing portion 210 and is fixedly connected with the moving portion 220, when the prestressed anchor cable device is put into use, the moving amount of the moving portion 220 relative to the fixing portion 210 is compressed to the minimum, the prestress of the anchor cable 100 resists the hydraulic pressure of the hydraulic jack 200, when the tension on the anchor cable 100 is reduced, the resistance of the anchor cable 100 to the moving portion 220 is reduced, the hydraulic pressure inside the hydraulic jack 200 acts on the moving portion 220, the moving amount of the moving portion 220 relative to the fixing portion 210 is increased, the tension is applied to the anchor cable 100 again, and the stress borne by the anchor cable 100 is kept not lower than the required value.
As shown in fig. 1-3, in some examples, the hydraulic jack 200 includes: the oil filling cavity 230 encloses the fixed portion 210 and the moving portion 220 to form the oil filling cavity 230, and the oil filling cavity 230 is communicated with the stress compensation system 300.
In this technical solution, the hydraulic jack 200 further includes an oil injection cavity 230, the oil injection cavity 230 is formed by enclosing a fixed portion 210 and a moving portion 220, the oil injection cavity 230 is communicated with a stress compensation system 300, in the actual use process, hydraulic oil 310 is injected into the oil injection cavity 230 after the anchor cable 100 is fixed, the hydraulic oil 310 and the hydraulic cavity realize the internal hydraulic pressure of the hydraulic jack 200, when the stress of the anchor cable 100 is reduced to be lower than the hydraulic pressure, the hydraulic pressure provided by the hydraulic oil 310 acts on the moving portion 220, and meanwhile, the stress compensation system 300 supplements the hydraulic oil 310 to the oil injection cavity 230, so as to maintain the hydraulic pressure in the oil injection cavity 230 constant.
As shown in fig. 1-3, in some examples, the cable bolt includes one or more cable bolts and the cable bolt of each cell includes a number of unbonded steel strands.
In the technical scheme, the pressure dispersion type anchor cable 100 is adopted and consists of one or more anchor cables 100, each unit anchor cable 100 is respectively composed of a plurality of unbonded steel strands, the steel strands adopt phi j15.24mm and phi j12.7mm high-strength low-relaxation unbonded prestressed steel strands, and one wire loop is arranged on each steel strand every 1.0-1.5 m along the axial direction of the anchor cable 100, so that the thickness of a protective layer of the anchor cable 100 is ensured to be not less than 20mm.
As shown in fig. 1-3, in some examples, the hydraulic jack 200 further includes: the first anchor disc 240, the first anchor disc 240 is disposed on one side of the moving part 220 extending out of the fixed part 210, and a plurality of holes for the anchor cable to pass through are formed in the first anchor disc 240; a fixing member 250, the fixing member 210 is fixedly connected to one end of the anchor cable 100 passing through the first anchor disc 240.
In this technical solution, the hydraulic jack 200 further includes a first anchor disc 240 and a fixing member 250, where after the anchor cable 100 is connected in series with the fixing portion 210 and the moving portion 220, the anchor cable 100 passes through the first anchor disc 240, after prestressing is applied to the anchor cable 100, one end of the anchor cable 100 extending out of the first anchor disc 240 is locked by the fixing member 250, stability of the anchor cable 100 after prestressing is applied can be ensured by setting the fixing member 250, retraction of the anchor cable 100 can be avoided, the first anchor disc 240 is set between the moving portion 220 and the fixing member 250, stress area of the moving portion 220 is enlarged, damage of the moving portion 220 caused by excessive stress is avoided, meanwhile, unbonded stranded wires of each unit anchor cable 100 can be further kept to be tightly twisted, loosening is avoided, and stability of this embodiment is further improved.
As shown in fig. 1-3, in some examples, the hydraulic jack 200 further includes: the second anchor disc 260 is arranged between the fixing part 210 and the slope rock mass, and a plurality of holes for the anchor cable to pass through are arranged on the second anchor disc 260.
In this technical scheme, add second anchor plate 260 between side slope rock mass and fixed part 210, increase the area of force, scatter side slope rock mass atress, avoid side slope rock mass to receive the too concentrated pressure and cause caving in, further promote the life of this embodiment.
As shown in fig. 1-3, in some examples, the stress compensation system 300 further includes: a hydraulic servo valve 330, said hydraulic servo valve 330 being in communication with said hydraulic jack 200; a conduit 340, one end of the conduit 340 being in communication with the hydraulic valve, the other end of the conduit 340 being in communication with the hydraulic accumulator; an oil supply valve 350, said oil supply valve 350 being arranged on said hydraulic accumulator.
In this solution, the stress compensation system 300 includes a hydraulic servo valve 330, a conduit 340, an oil supply valve 350, and further includes hydraulic oil 310 and a hydraulic accumulator 320, where the stress compensation system 300 is communicated with the hydraulic expander 200 through the hydraulic servo valve 330, and when the hydraulic pressure in the hydraulic expander 200 decreases, the hydraulic servo valve 330 is started to convey the hydraulic oil 310 in the hydraulic accumulator 320 to the hydraulic expander 200 through the conduit 340, so as to supplement the hydraulic pressure for the hydraulic expander 200, and meanwhile, the oil supply valve 350 is provided at the tail of the hydraulic accumulator 320, so as to supply the hydraulic oil 310 to the inside of the hydraulic accumulator 320.
As shown in fig. 1-3, in some examples, the stress compensation system 300 further includes: a pressure monitoring assembly for monitoring the pressure inside the hydraulic accumulator and hydraulic jack 200.
In this technical scheme, add pressure monitoring subassembly, carry out oil pressure monitoring to hydraulic pressure expansion bend 200 and energy storage ware, through big data connection with oil pressure monitoring signal data networking transmission to high in the clouds and data center, realize the long-range on-line monitoring to the device, the application of this technique ensures that oil pressure numerical value changes can carry out the secondary and supplements for the device remains higher stress bearing capacity throughout long-term use, not only, when monitoring finds that the inside oil pressure of hydraulic pressure expansion bend 200 is unusual to rise, it is possible that the prestressed anchorage cable is elongated by the deformation of joint rock mass, timely side slope to unusual data department carries out disaster prevention survey this moment, avoid causing property and personnel loss.
As shown in fig. 4, a second aspect according to an embodiment of the present application proposes a use method, applied to any one of the prestressed anchor cable devices described above, including:
step 110: the prestress anchor cable is arranged on a side rock slope body to be fixed;
step 120: communicating the hydraulic jack with the stress compensation system;
step 130: the pressure of the hydraulic telescopic device and the pressure of the stress compensation system reach balance;
step 140: and controlling the hydraulic expansion device and the stress compensation system to carry out oil pressure change based on the tension change of the anchor cable.
It will be appreciated that in the process of step 120, the jack is used to sequentially apply the pulling force to the anchor cable to achieve the target value, then the anchor cable and the hydraulic jack are fixedly connected, at this time, the displacement of the hydraulic jack is compressed to the minimum, the internal oil pressure and the tension of the anchor cable against the hydraulic jack are balanced, and when the tension of the anchor cable is reduced, the stress compensation device supplements the oil pressure to the hydraulic jack to elongate and deform the hydraulic jack and increase the tension of the prestressed anchor cable.
It will be appreciated that after the pre-stressed anchor cable installation is completed during step 130, an operator may inject a quantity of hydraulic oil into the hydraulic telescoping device via the automatic servo system of the stress compensation system to cause a small amount of elongation deformation to test the reliability and stability of the stress compensation mechanism.
As shown in fig. 5, in some examples, the pre-stressed anchor cable is disposed on a side rock slope to be fixed, and includes:
step 111: an anchor hole is drilled, the anchor hole penetrates through the sliding surface of the Bian Yanpo body and extends into the stable rock mass;
step 112: one end of the anchor cable extends into the anchor hole;
step 113: grouting and reinforcing the anchoring holes;
step 114: the other end passes through the hydraulic telescopic device and out of the hydraulic telescopic device.
In the technical scheme, the hydraulic expansion joint is fixedly connected with the side slope by adopting concrete, grouting is carried out on the anchoring section, cement mortar is adopted for grouting, the construction mix proportion is determined after test comparison selection, the actual grouting amount is generally larger than the theoretical grouting amount, or the anchor exhaust hole is not exhausted any more and the orifice slurry overflows from the thick slurry to serve as the standard for finishing grouting.
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 pre-stressed anchor cable assembly, comprising:
one end of the anchor cable is used for being fixed in the slope rock mass;
the hydraulic expansion device is connected with the other end of the anchor cable;
the stress compensation system comprises hydraulic oil and a hydraulic accumulator, wherein the hydraulic oil is arranged in the hydraulic accumulator, and the hydraulic accumulator is communicated with the hydraulic telescopic device;
the hydraulic pressure of the hydraulic telescopic device is positively correlated with the stress born by the anchor cable.
2. The pre-stressed anchor cable assembly of claim 1, wherein the hydraulic jack comprises:
the fixing part is used for clinging to the slope rock mass, and adopts a tubular structure with an opening at one side;
a moving part, wherein the moving part is hollow, is arranged in the fixed part and is connected with the fixed part in a sliding way;
one side of the moving part extends out of the fixing part through an opening on the fixing part;
an anchor cable hole is formed in one end, extending out of the fixed part, of the moving part;
and an anchor rope hole is formed in one end, close to the slope rock mass, of the fixing part.
3. The pre-stressed anchor cable assembly of claim 2, wherein the hydraulic jack comprises:
an oil injection cavity, wherein the fixed part and the moving part are enclosed to form the oil injection cavity;
the oiling cavity is communicated with the stress compensation system.
4. The pre-stressed anchor cable assembly of claim 1, wherein:
the anchor cable comprises one or more anchor cables, and each anchor cable of each unit comprises a plurality of unbonded steel strands.
5. The pre-stressed anchor cable assembly of claim 2, wherein the hydraulic jack further comprises:
the first anchor disc is arranged on one side of the moving part extending out of the fixed part, and a plurality of holes through which the anchor cables can pass are formed in the first anchor disc;
the fixing piece is fixedly connected to one end of the anchor rope penetrating through the first anchor disc.
6. The pre-stressed anchor cable assembly of claim 5, wherein the hydraulic jack further comprises:
the second anchor disc is arranged between the fixed part and the slope rock body, and a plurality of holes through which the anchor cables can pass are formed in the second anchor disc.
7. The pre-stressed anchor cable assembly of claim 1, wherein the stress compensation system further comprises:
the hydraulic servo valve is communicated with the hydraulic telescopic device;
one end of the conduit is communicated with the hydraulic valve, and the other end of the conduit is communicated with the hydraulic accumulator;
and the oil supply valve is arranged on the hydraulic energy accumulator.
8. The pre-stressed anchor cable assembly of claim 7, wherein the stress compensation system further comprises:
and the pressure monitoring assembly is used for monitoring the pressure inside the hydraulic accumulator and the hydraulic telescopic device.
9. A method of use for the pre-stressed anchor line arrangement of any one of claims 1 to 8, comprising:
the prestressed anchor cable is arranged on a side rock slope body to be fixed;
communicating the hydraulic jack with the stress compensation system;
the pressure of the hydraulic telescopic device and the pressure of the stress compensation system reach balance;
and controlling the hydraulic expansion device and the stress compensation system to carry out oil pressure change based on the tension change of the anchor cable.
10. The method of claim 9, wherein the pre-stressed anchor cable is disposed on a side rock slope to be secured, comprising:
an anchor hole is drilled, the anchor hole penetrates through the sliding surface of the Bian Yanpo body and extends into the stable rock mass;
one end of the anchor cable extends into the anchor hole, and the other end of the anchor cable penetrates through the hydraulic telescopic device and extends out of the hydraulic telescopic device;
grouting and reinforcing the anchoring holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073773.1A CN116254832A (en) | 2023-02-03 | 2023-02-03 | Prestressed anchor cable device and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310073773.1A CN116254832A (en) | 2023-02-03 | 2023-02-03 | Prestressed anchor cable device and use method |
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| Publication Number | Publication Date |
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| CN116254832A true CN116254832A (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310073773.1A Pending CN116254832A (en) | 2023-02-03 | 2023-02-03 | Prestressed anchor cable device and use method |
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| CN (1) | CN116254832A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020015986A (en) * | 1999-01-26 | 2002-03-02 | 블럼버그, 마빈 | High Speed Typing Apparatus and Method |
| CN101266473A (en) * | 2008-04-22 | 2008-09-17 | 中国水利水电第七工程局成都水电建设工程有限公司 | Anchorage cable stretching automatic monitoring system and control method |
| CN203160240U (en) * | 2013-03-29 | 2013-08-28 | 许年春 | Prestress self-generated and self-adjusted anchor cable anchoring device |
| CN214363507U (en) * | 2020-12-29 | 2021-10-08 | 北京市地质工程公司 | Anchor rod tension real-time monitoring and automatic compensation system and anchor rod supporting system |
-
2023
- 2023-02-03 CN CN202310073773.1A patent/CN116254832A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020015986A (en) * | 1999-01-26 | 2002-03-02 | 블럼버그, 마빈 | High Speed Typing Apparatus and Method |
| CN101266473A (en) * | 2008-04-22 | 2008-09-17 | 中国水利水电第七工程局成都水电建设工程有限公司 | Anchorage cable stretching automatic monitoring system and control method |
| CN203160240U (en) * | 2013-03-29 | 2013-08-28 | 许年春 | Prestress self-generated and self-adjusted anchor cable anchoring device |
| CN214363507U (en) * | 2020-12-29 | 2021-10-08 | 北京市地质工程公司 | Anchor rod tension real-time monitoring and automatic compensation system and anchor rod supporting system |
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