CN113774932A - Novel prefabricated anchor head pressure type anchor cable structure and construction method thereof - Google Patents
Novel prefabricated anchor head pressure type anchor cable structure and construction method thereof Download PDFInfo
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- CN113774932A CN113774932A CN202111140082.6A CN202111140082A CN113774932A CN 113774932 A CN113774932 A CN 113774932A CN 202111140082 A CN202111140082 A CN 202111140082A CN 113774932 A CN113774932 A CN 113774932A
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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
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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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Abstract
The invention discloses a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof, wherein the novel prefabricated anchor head pressure type anchor cable structure comprises an anchor cable structure fixedly arranged in an anchor hole, the anchor cable structure comprises an anchor head, an anchor body and an anchor tail which are arranged in the anchor hole from inside to outside, and the anchor tail extends out of the anchor hole; the anchor head comprises a pressure-bearing assembly, and the pressure-bearing assembly is fixedly connected with the anchor body; one end of the pressure-bearing component, which is far away from the anchor body, is fixedly connected with a guide cap, and an inner cavity of the guide cap is provided with an anti-pulling component; the anchor body comprises a plurality of steel cables which are arranged in an annular shape, a grouting pipe is arranged at the center of the annular shape, the grouting pipe is spliced with the guide cap and communicated with the inner cavity of the guide cap, and the steel cables are fixedly connected with the guide cap; the anchor tail comprises an anchoring mechanism arranged outside the anchor hole, and the anchoring mechanism is fixedly connected with the steel strand. The anchor cable has the advantages of being strong in structure compactness and pulling resistance, effectively reinforcing the geological stability of the side slope, improving the construction safety and the engineering service life, and effectively protecting the personal safety of a user.
Description
Technical Field
The invention relates to the technical field of building supporting engineering, in particular to a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof.
Background
The anchor cable is a rod-shaped member mainly bearing tensile force, and is characterized by that it utilizes drilling to fix the steel strand or high-strength steel wire in the deep stable stratum, and makes the surface of the reinforced body produce prestress by means of tension so as to attain the goal of stabilizing reinforced body and limiting its deformation. In geotechnical engineering construction, the prestressed anchoring technology has become the most common geotechnical body reinforcing measure, and the prestressed anchor cable can actively reinforce the geotechnical body, effectively increase the rock mass stability safety coefficient, and ensure the safety of engineering construction and operation period.
At present, certain achievements have been achieved on the stability of a road side slope in geotechnical engineering, but the stability of the road side slope in Guangxi regions is not enough to be treated, which is mainly reflected in that Guangxi belongs to mountain and hilly basin landforms, the relief degree is large, the annual rainfall is concentrated, landslides are easy to occur in the excavation of the cutting side slope and the construction process of a highway, the construction engineering and human lives and properties in the region are threatened, and therefore an anchoring device with stronger anchoring performance is needed to improve the stability of the high side slope.
Disclosure of Invention
The invention aims to provide a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a novel prefabricated anchor head pressure type anchor cable structure which comprises an anchor cable structure fixedly installed in an anchor hole, wherein the anchor cable structure comprises an anchor head, an anchor body and an anchor tail which are arranged in the anchor hole from inside to outside;
the anchor head comprises a pressure-bearing assembly, and the pressure-bearing assembly is fixedly connected with the anchor body; one end of the pressure-bearing assembly, which is far away from the anchor body, is fixedly connected with a guide cap, and an inner cavity of the guide cap is provided with an anti-pulling assembly;
the anchor body comprises a plurality of steel cables which are arranged in an annular shape, a grouting pipe is arranged at the center of the annular shape, the grouting pipe is spliced with the guide cap and communicated with the inner cavity of the guide cap, and the steel cables are fixedly connected with the guide cap;
the anchor tail comprises an anchoring mechanism arranged outside the anchor hole, and the anchoring mechanism is fixedly connected with the steel strand.
Preferably, the anti-pulling assembly comprises a plurality of communicating grooves formed in the side wall of the guide cap, and the communicating grooves are communicated with the inner cavity of the guide cap; anti-pulling teeth are arranged in the communicating groove, one end, away from the pressure-bearing component, of each anti-pulling tooth is hinged with the communicating groove through a hinged shaft, and a non-return component is arranged at any end of each hinged shaft; and one side of the anti-pulling tooth, which faces the center of the guide cap, is fixedly connected with an ejection spring between the guide cap, and the end head of one end of the anti-pulling tooth, which is close to the pressure-bearing component, is in limit connection with the communicating groove through a limiting rod.
Preferably, the non-return assembly comprises a non-return gear, the non-return gear is fixedly connected with one end of the hinge shaft, and the non-return gear is coaxial with the hinge shaft; the non-return gear is in limit connection with a non-return elastic sheet, and one end, far away from the non-return gear, of the non-return elastic sheet is fixedly connected with the guide cap.
Preferably, the slip casting pipe includes the body, the body orientation the one end of direction cap with direction cap sliding connection and intercommunication the direction cap inner chamber, the body is located one end rigid coupling in the direction cap has the seal subassembly, seal the subassembly with the gag lever post butt.
Preferably, the sealing assembly comprises a base fixedly connected with the pipe body, one end of the base, far away from the pipe body, is slidably connected with a sealing cover, and the sealing cover is abutted to the limiting rod.
Preferably, the pressure-bearing assembly comprises a mounting plate fixedly connected with the guide cap, the steel cable and the grouting pipe penetrate through the mounting plate, the steel cable is fixedly connected with the mounting plate, and the grouting pipe is slidably connected with the mounting plate; the mounting panel is kept away from the one end of direction cap has the bearing plate through a plurality of connecting rod rigid couplings, the bearing plate is kept away from the one end rigid coupling of direction cap has the spiral muscle.
Preferably, the anchor body is further provided with a reinforcing assembly, the reinforcing assembly comprises a stringing ring and a fixing ring, the stringing ring and the fixing ring are arranged in a staggered mode at intervals, and the steel strand and the grouting pipe penetrate through the fixing ring and the stringing ring; the reinforcing assembly further comprises a protective sleeve, one end of the protective sleeve is fixedly connected with the pressure bearing plate, the other end of the protective sleeve extends out of the anchor hole, and the stringing ring and the fixing ring are both arranged in the protective sleeve; the outer wall of the protective sleeve is fixedly connected with a plurality of positioning frames at equal intervals in the circumferential direction.
A novel construction method of a prefabricated anchor head pressure type anchor cable structure comprises the following construction steps:
s1, cleaning a field and positioning and drawing lines;
s2, manufacturing and assembling anchor cables;
s3, constructing anchor holes;
s4, installing an anchor cable;
s5, grouting;
s6, applying prestress and checking;
and S7, constructing anchor cable frame beams.
Preferably, in step S3, the anchor hole has a depth that is greater than or equal to 50cm longer than the anchor line; and cleaning the anchor hole after the anchor hole is constructed.
Preferably, in step S5, secondary hole cleaning is performed before grouting; and completing grouting once, and starting grouting from the bottom until cement slurry naturally flows out of the anchor hole.
The invention discloses the following technical effects: the invention discloses a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof.A anchor cable device is firmly fixed in an anchor hole through an anchor head, an anchor body and an anchor tail which are fixedly connected in sequence, so that the stability of a road side slope is improved, and the occurrence frequency of geological disasters such as landslide, landslide and the like is reduced; the anti-pulling assembly is arranged on the anchor head, so that the anchoring degree of the anchor head in the anchor hole is improved, the anti-pulling capacity of the anchor cable is improved, and the improvement degree of the anchor cable on the stability of the high side slope of the road is enhanced; the anti-pulling assembly in the anchor head is assembled in advance, so that the assembly efficiency of the anchor cable device is improved, and the construction progress is effectively shortened. The anchor cable has the advantages of being strong in structure compactness and pulling resistance, effectively reinforcing the geological stability of the side slope, improving the construction safety and the engineering service life, and effectively protecting the personal safety of a user.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 without creative efforts.
FIG. 1 is a three-dimensional view of the novel prefabricated anchor head pressure type anchor cable structure of the present invention;
FIG. 2 is an installation diagram of the novel prefabricated anchor head pressure type anchor cable structure of the present invention;
FIG. 3 is a schematic view of the anchor head of the present invention;
FIG. 4 is a schematic view of a positioning frame according to the present invention;
FIG. 5 is a schematic view of a wire loop configuration of the present invention;
FIG. 6 is a schematic view of a retaining ring according to the present invention;
FIG. 7 is a schematic view of the closure assembly of the present invention;
FIG. 8 is an enlarged view of a portion of FIG. 3;
FIG. 9 is a partial enlarged view of B in FIG. 3;
FIG. 10 is an enlarged view of a portion C of FIG. 7;
wherein, 1, an anchor head; 2. an anchor body; 3. anchoring the tail; 4. an anchor eye; 11. a pressure-bearing assembly; 12. a guide cap; 13. an anti-plucking component; 111. mounting a plate; 112. a connecting rod; 113. a pressure bearing plate; 114. a spiral rib; 131. a communicating groove; 132. anti-tooth pulling; 133. hinging a shaft; 134. ejecting a spring; 135. a limiting rod; 136. a check assembly; 137. a reinforcing block; 1361. a non-return gear; 1362. a non-return spring sheet; 21. a steel wire rope; 22. a grouting pipe; 23. a reinforcement assembly; 24. connecting a screw rod; 221. a pipe body; 222. a seal assembly; 231. a stringing ring; 232. a fixing ring; 233. protecting the sleeve; 234. a positioning frame; 2221. a base; 2222. sealing the cover; 2223. a slide hole; 2224. a slide bar; 2225. a locking hole; 2226. blocking the ball; 2227. a locking spring; 2228. a gasket is provided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-10, the invention provides a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof, comprising an anchor cable structure fixedly installed in an anchor hole 4, wherein the anchor cable structure comprises an anchor head 1, an anchor body 2 and an anchor tail 3 which are arranged in the anchor hole 4 from inside to outside, the anchor head 1, the anchor body 2 and the anchor tail 3 are fixedly connected in sequence, and the anchor tail 3 extends out of the anchor hole 4;
the anchor head 1 comprises a pressure-bearing component 11, and the pressure-bearing component 11 is fixedly connected with the anchor body 2; one end of the pressure-bearing component 11, which is far away from the anchor body 2, is fixedly connected with a guide cap 12, and an inner cavity of the guide cap 12 is provided with an anti-pulling component 13;
the anchor body 2 comprises a plurality of steel cables 21, the steel cables 21 are arranged in a ring shape, a grouting pipe 22 is arranged at the center of the ring shape, the grouting pipe 22 is inserted into the guide cap 12 and communicated with the inner cavity of the guide cap 12, and the steel cables 21 are fixedly connected with the guide cap 12;
the anchor tail 3 comprises an anchoring mechanism arranged outside the anchor hole 4, and the anchoring mechanism is fixedly connected with the steel strand 21.
The invention discloses a novel prefabricated anchor head pressure type anchor cable structure and a construction method thereof.A anchor cable device is firmly fixed in an anchor hole 4 through an anchor head 1, an anchor body 2 and an anchor tail 3 which are fixedly connected in sequence, so that the stability of a road side slope is improved, and the occurrence frequency of geological disasters such as landslide, landslide and the like is reduced; the anti-pulling assembly 13 is arranged on the anchor head 1, so that the anchoring degree of the anchor head 1 in the anchor hole 4 is improved, the anti-pulling capacity of the anchor cable is improved, and the lifting degree of the anchor cable to the stability of a high slope of a road is enhanced; the uplift assembly 13 in the anchor head 1 is assembled in advance, so that the assembly efficiency of the anchor cable device is improved, and the construction progress is effectively shortened.
In a further optimized scheme, the anti-pulling assembly 13 comprises a plurality of communicating grooves 131 formed in the side wall of the guide cap 12, and the communicating grooves 131 are communicated with the inner cavity of the guide cap 12; an anti-pulling tooth 132 is arranged in the communication groove 131, one end, far away from the pressure-bearing component 11, of the anti-pulling tooth 132 is hinged with the communication groove 131 through a hinge shaft 133, and a check component 136 is arranged at any end of the hinge shaft 133; an ejection spring 134 is fixedly connected between one side of the anti-pulling tooth 132 facing the center of the guide cap 12 and the guide cap 12, and the end of one end of the anti-pulling tooth 132 close to the pressure-bearing component 11 is in limit connection with the communicating groove 131 through a limiting rod 135; the non-return component 136 comprises a non-return gear 1361, the non-return gear 1361 is fixedly connected with one end of the hinge shaft 133, and the non-return gear 1361 is coaxial with the hinge shaft 133; the non-return gear 1361 is in limited connection with a non-return elastic sheet 1362, and one end of the non-return elastic sheet 1362 far away from the non-return gear 1361 is fixedly connected with the guide cap 12. In the initial state, the limiting rod 135 clamps the top end of the anti-pulling tooth 132, the pop-up spring 134 is compressed, and the anti-pulling tooth 132 is retracted into the communication groove 131, so that the anchor cable device is not prevented from penetrating into the anchor hole 4; after the anchor cable is positioned in the anchor hole 4, the limiting rod 135 deflects under the pressure of the grouting pipe 22, so that the top end of the anti-pulling tooth 132 hooked by the limiting rod 135 is loosened, the anti-pulling tooth 132 is popped out from the communicating groove 131 under the action of the pop-out spring 134, the top end of the anti-pulling tooth 132 props against the hole wall of the anchor hole 4, and when the anchor head 1 is subjected to an outward acting force, the anti-pulling tooth 132 props against the side wall of the anchor hole 4, so that the anti-pulling force of the anchor head 1 is enhanced; the anti-pulling elastic sheet 1362 is obliquely arranged and is inclined towards the top end direction of the anti-pulling teeth 132, when the anti-pulling teeth 132 are ejected, the hinge shaft 133 drives the anti-pulling gear 1361 to rotate, the rotating direction is the same as the inclined direction of the anti-pulling elastic sheet 1362, so that the rotation of the anti-pulling gear 1361 is not hindered, but when the anti-pulling gear 1361 has a reverse rotating trend, the anti-pulling elastic sheet 1362 abuts against the tooth surface of the anti-pulling gear 1361, the anti-pulling gear 1361 cannot rotate, the anti-pulling teeth 132 cannot be pressed back into the communication groove 131, the anti-pulling teeth 132 are prevented from being pressed back into the communication groove 131 by cement filler during grouting, and the anti-pulling performance of the anchor head 1 is reduced.
Further, a reinforcing block 137 is fixed in the inner cavity of the guide cap 12, one end of the ejection spring 134, which is far away from the anti-pulling tooth 132, is fixedly connected with the reinforcing block 137, and the fixed end of the non-return elastic sheet 1362 is also fixed on the reinforcing block 137; meanwhile, the reinforcing block 137 can adjust the balance weight of the guide cap 12, and the passing property of the guide cap 12 when entering the anchor hole 4 is improved.
Furthermore, the top end of the anti-pulling tooth 132 is provided with an oblique tip, so that the anti-pulling tooth 132 can be conveniently inserted into the side wall of the anchor hole 4, and the anti-pulling performance of the anchor head 1 is improved; meanwhile, the limiting point of the limiting rod 135 and the anti-pulling tooth 132 is in a hook shape, the tip of the anti-pulling tooth 132 is hooked, the anti-pulling tooth 132 is prevented from popping up before anchoring, and only when the limiting rod 135 is stressed to deflect, the limiting rod 135 can release the anti-pulling tooth 132, so that the anti-pulling tooth 132 pops up.
In a further optimized scheme, the grouting pipe 22 comprises a pipe body 221, one end of the pipe body 221 facing the guide cap 12 is connected with the guide cap 12 in a sliding manner and communicated with the inner cavity of the guide cap 12, one end of the pipe body 221 located in the guide cap 12 is fixedly connected with a sealing assembly 222, and the sealing assembly 222 is abutted against the limiting rod 135; the sealing assembly 222 includes a base 2221 fixedly connected to the tube 221, one end of the base 2221 away from the tube 221 is slidably connected to a sealing cover 2222, and the sealing cover 2222 is abutted to the limiting rod 135. In an initial state, the sealing cover 2222 is tightly attached to the base 2221, so that when the anchor cable is lowered into the anchor hole 4, soil in the anchor hole 4 is prevented from blocking the grouting pipe 22, and a subsequent grouting procedure is prevented from being influenced; the sealing cover 2222 abuts against the limiting rod 135, when secondary hole cleaning is needed after the anchor head 1 is installed in place, high-pressure air needs to be injected into the grouting pipe 22, the high-pressure air finally acts on the sealing cover 2222, the sealing cover 2222 is pushed away from the base 2221, the compressed air flows out, and secondary hole cleaning is conducted on the anchor hole 4; meanwhile, when the sealing cover 2222 is pushed, one end of the limiting rod 135 is pushed, the middle part of the limiting rod 135 is provided with a hinge shaft which is hinged with the inner cavity of the guide cap 12, when the limiting rod 135 props against one end of the sealing cover 2222 to deflect, the other end of the limiting rod 135 does not hook the anti-pulling tooth 132 any longer, the anti-pulling tooth 132 pops out of the communicating groove 131 under the action of the popping spring 134, and the unfolding of the anti-pulling tooth 132 is completed. Meanwhile, the sealing cover 2222 can also diffuse high-pressure air during secondary hole cleaning and cement slurry during grouting, so that the high-pressure air and the cement slurry impacting on the sealing cover 2222 are dispersed all around, the distribution of the high-pressure air and the cement slurry is more uniform, and the effects of secondary hole cleaning and grouting are improved.
Further, a plurality of locking holes 2225 are circumferentially and equidistantly formed in the base 2221, a groove corresponding to the locking hole 2225 is formed in the inner side wall of the sealing cover 2222, a clamping ball 2226 is slidably connected in the locking hole 2225, a clavicle spring is connected to the hole bottoms of the clamping ball 2226 and the locking hole 2225, when the sealing cover 2222 is assembled with the base 2221, the locking hole 2225 is opposite to the groove, the locking ball 2226 is pushed into the groove by the locking spring 2227, so that the sealing cover 2222 and the base 2221 are clamped, and the sealing cover 2222 cannot be separated without the action of external force; the base 2221 is further provided with a plurality of sliding holes 2223, a plurality of sliding rods 2224 are fixed at positions of the sealing cover 2222 corresponding to the sliding holes 2223, the sliding rods 2224 are slidably connected with the sliding holes 2223, but the sliding rods 2224 do not slip out of the sliding holes 2223, when the sealing cover 2222 is pushed by high-pressure air, the sealing cover 2222 slides to the stroke range of the sliding rods 2224 and is then clamped by the sliding holes 2223, so that the sealing cover 2222 is prevented from being washed off by the high-pressure air and subsequent cement slurry; a sealing gasket 2228 is disposed between the cover 2222 and the base 2221, so that the cover 2222 and the base 2221 form a sealed environment, and when high-pressure air is injected, the pressure in the tube 221 rises, and the cover 2222 can be ejected.
According to a further optimized scheme, the pressure-bearing assembly 11 comprises a mounting plate 111 fixedly connected with the guide cap 12, a steel cable 21 and a grouting pipe 22 penetrate through the mounting plate 111, the steel cable 21 is fixedly connected with the mounting plate 111, and the grouting pipe 22 is connected with the mounting plate 111 in a sliding manner; one end of the mounting plate 111 far away from the guide cap 12 is fixedly connected with a bearing plate 113 through a plurality of connecting rods 112, and one end of the bearing plate 113 far away from the guide cap 12 is fixedly connected with a spiral rib 114.
According to a further optimized scheme, the anchor body 2 is further provided with a reinforcing assembly 23, the reinforcing assembly 23 comprises a stringing ring 231 and a fixing ring 232, the stringing ring 231 and the fixing ring 232 are arranged in a staggered mode at intervals, and the steel strand 21 and the grouting pipe 22 penetrate through the fixing ring 232 and the stringing ring 231; the reinforcing assembly 23 further comprises a protective sleeve 233, one end of the protective sleeve 233 is fixedly connected with the pressure-bearing plate 113, the other end of the protective sleeve 233 extends out of the anchor hole 4, and the stringing ring 231 and the fixing ring 232 are both arranged in the protective sleeve 233; the outer wall of the protection sleeve 233 is fixedly connected with a plurality of positioning frames 234 at equal intervals along the circumferential direction. The fixing ring 232 is a closed template provided with a through hole, and the through hole is arranged corresponding to the steel strand 21 and the grouting pipe 22; the diameters of the stringing ring 231 and the fixing ring 232 are equal, and corresponding through holes are also formed, the difference between the diameters of the stringing ring 231 and the fixing ring 232 is that the through holes corresponding to the stringing ring 231 and the steel strand 21 are U-shaped holes, the outlet of the U-shaped hole penetrates through the outer edge of the stringing ring 231, the stringing ring 231 and the fixing ring 232 are arranged at intervals when the steel strand rope is used, and the interval between the adjacent stringing ring 231 and the fixing ring 232 is 1m-2 m; when the grouting pipe 22 is installed, the grouting pipe 22 penetrates through a through hole between the stringing ring 231 and the fixing ring 232, the steel strand 21 is the same as the grouting pipe 22 when penetrating through the fixing ring 232, the steel strand 21 is pressed from the U-shaped inlet through the U-shaped hole of the stringing ring 231, and the steel strand 21 is fixed at a certain position by the mutual matching of the steel strand and the grouting pipe, so that the steel strand 21 is prevented from collapsing; the protective sleeve 233 and the bearing plate 113 form a closed space, which is sleeved outside the steel strand 21, the stringing ring 231 and the fixing ring 232 to prevent the steel strand from being solidified and keep a free state, the concrete grout in the anchor hole 4 is filled between the side wall of the anchor hole 4 and the outer wall of the protective sleeve 233, so that the anchor cable device of the anchor hole 4 is ensured to be firmly fixed, the anchor cable formed by the steel strand 21 cannot be solidified and lose free movement, the tensile strength of the anchor cable structure is improved, and the protective sleeve 233 is just positioned at the center of the anchor hole 4 due to the fact that a plurality of positioning frames are arranged at equal intervals in the circumferential direction outside the protective sleeve.
Further, a protective sleeve made of an anti-corrosion material is sleeved outside the steel strand 21, and anti-rust grease is filled between the steel strand 21 and the protective sleeve; when the anti-rust anchor is installed, the outer side of the steel cable 21 is coated with anti-rust grease, and then the steel cable 21 penetrates into the protective sleeve, so that the steel cable 21 is prevented from being corroded by rust in the anchor hole 4, and the anchoring effect is reduced.
Further, the stringing ring 231 and the fixing ring 232 are fixedly installed by the connecting screw 24, and the top end of the connecting screw 24 is fixedly connected with the guide cap 12.
Further, a plurality of positioning frames 234 are also fixedly connected to the outer wall of the guide cap 12 at equal intervals in the circumferential direction for positioning the guide cap 12.
A novel construction method of a prefabricated anchor head 1 pressure type anchor cable structure comprises the following construction steps:
s1, cleaning a field and positioning and drawing lines; according to the requirements of the specification JTGF90-2015, the installation positions and the arrangement intervals of the anchor cables are determined according to the geological conditions and the climate of a construction site, then sundries and floating soil on the construction site are cleaned, then line drawing is clearly and accurately carried out, the positions of the anchor holes 4 are marked, and the position deviation of the anchor holes 4 is not more than 50 mm;
s2, manufacturing and assembling anchor cables; the manufacturing process of the anchor cable comprises the steps of blanking the steel strand 21 according to the depth of the anchor hole 4, cutting by using a mechanical cutting machine, forbidding gas cutting and electric welding cutting, preventing the property change of the steel strand 21 caused by high temperature, and reserving a margin of 1.5-2 m for blanking the steel strand 21; grouping steel cables 21 according to the designed strength of the anchor cable; then, coating rust-proof grease on the steel strand 21 and penetrating the steel strand into the protective sleeve; manufacturing a fixing ring 232 and a stringing ring 231, removing rust on the surfaces of the fixing ring 232 and the stringing ring 231, coating antirust paint, sequentially installing a grouting pipe 22 and a steel strand 21 with the fixing ring 232 and the stringing ring 231, and finally installing an anchor head 1;
s3, constructing an anchor hole 4; constructing an anchor hole 4 on a construction site with a well-drawn line, aligning a drill bit of a drilling machine to the position of the anchor hole 4, adjusting the angle of the drill bit, then starting drilling, wherein the depth of the drilled hole is 0.5m longer than the designed depth, the drilling machine adopts a ZSL-100 type anchor rod machine, adopts pneumatic dry drilling, and continuously operates for 1-2 min after the drilled hole is positioned, so that the tail end of the anchor hole 4 is prevented from collapsing; after drilling, discharging the residue soil in the anchor hole 4 in the process of withdrawing the anchor rod, then inserting a high-pressure air pipe into the bottom end of the anchor hole 4, then cleaning the hole for the first time by using high-pressure air, and blowing the floating soil and residue in the hole out of the anchor hole 4;
s4, installing an anchor cable; the assembled anchor cable is lowered into the anchor hole 4 from the anchor head 1 until the end part of the guide cap 12 reaches the bottom of the anchor hole 4; the interval from the assembly of the anchor cable to the anchor dropping does not exceed 24 h;
s5, grouting; injecting high-pressure air again through the grouting pipe 22 before grouting, performing secondary hole cleaning on the anchor hole 4, and blowing out the floating soil and the slag soil brought in during anchoring out of the anchor hole 4; injecting the mixed cement slurry into the anchor hole 4 through the grouting pipe 22, and starting grouting from the bottom to inject the cement slurry from bottom to top until clean cement slurry flows out from the inlet of the anchor hole 4; the grouting is required to be completed once and cannot be injected for multiple times, and the grouting pipe 22 is gradually withdrawn during grouting; when cement paste settlement occurs after the first grouting, the cement paste needs to be timely injected; curing the grouted cement paste according to the requirements, wherein the curing time is not less than 7 days;
s6, applying prestress and checking; when the hardness of the cement paste reaches over 75% of the designed hardness, the anchor cable is pulled through a through type hydraulic jack, the pulling forces are 80%, 100% and 120% of the designed bearing force respectively, the pulling force is maintained for 5min, and the extension length of the steel strand 21 is recorded; then, the construction party and the supervision party check and accept;
s7, constructing anchor cable frame beams; and applying an anchor tail 3 for construction of the anchor cable with qualified prestress acceptance, abutting the anchor tail 3 with the top surface of the anchor hole 4, constructing an anchor cable frame beam according to design requirements, combining the anchor cable, dispersing the pulling force of a single point, and improving the integral tensile resistance of the side slope.
The using method comprises the following steps:
and determining the installation position and the arrangement interval of the anchor cables according to the standard requirements and the geological conditions and climate of the construction site, cleaning sundries and floating soil on the construction site, clearly and accurately drawing lines, and marking the positions of the anchor holes 4.
The anchor cable is assembled in the inner field, the steel cable 21 is blanked, the grouting pipe 22 is blanked, the wire stringing ring 231, the fixing ring 232, the protecting sleeve 233 and the positioning frame 234 are manufactured and processed, and then the anchor head 1 and the anchor body 2 are assembled according to the drawing.
The anchor hole 4 is constructed by drilling, the depth of the anchor hole 4 is about 50cm greater than the design depth, and hole cleaning is carried out for the first time after construction is completed.
The assembled anchor cable is lowered into the anchor hole 4 from the anchor head 1 until the end part of the guide cap 12 reaches the bottom of the anchor hole 4; the interval between the assembly of the anchor cable and the anchor lowering does not exceed 24 h.
After the anchor cable is installed, hole cleaning is performed for the second time, high-pressure air pushes the sealing cover 2222, the sealing cover 2222 pushes one end of the limiting rod 135, the middle of the limiting rod 135 is provided with a hinge shaft which is hinged with the inner cavity of the guide cap 12, when the limiting rod 135 abuts against one end of the sealing cover 2222 to deflect, the other end of the limiting rod 135 does not hook the anti-pulling tooth 132 any more, the anti-pulling tooth 132 pops out of the communicating groove 131 under the action of the popping spring 134, and unfolding of the anti-pulling tooth 132 is completed; then grouting is carried out, the grouting is required to be finished at one time and cannot be injected for multiple times, and the grouting pipe 22 is gradually retracted during grouting; when cement paste settlement occurs after the first grouting, the cement paste needs to be timely injected; and curing the grouted cement paste according to the requirements, wherein the curing time is not less than 7 days.
When the hardness of the cement paste reaches over 75% of the designed hardness, the anchor cable is drawn through the passing hydraulic jack, prestress is applied to the anchor cable, and then the anchor cable is checked and accepted.
And applying an anchor tail 3 for construction of the anchor cable with qualified prestress acceptance, abutting the anchor tail 3 with the top surface of the anchor hole 4, constructing an anchor cable frame beam according to design requirements, combining the anchor cable, dispersing the pulling force of a single point, and improving the integral tensile resistance of the side slope.
The anchor cable has the advantages of being strong in structure compactness and pulling resistance, effectively reinforcing the geological stability of the side slope, improving the construction safety and the engineering service life, and effectively protecting the personal safety of a user.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a novel prefabricated anchor head pressure type anchor rope structure, includes the anchor rope structure of fixed mounting in anchor eye (4), its characterized in that: the anchor cable structure comprises an anchor head (1), an anchor body (2) and an anchor tail (3) which are arranged in the anchor hole (4) from inside to outside, the anchor head (1), the anchor body (2) and the anchor tail (3) are fixedly connected in sequence, and the anchor tail (3) extends out of the anchor hole (4);
the anchor head (1) comprises a pressure-bearing assembly (11), and the pressure-bearing assembly (11) is fixedly connected with the anchor body (2); one end of the pressure-bearing component (11) far away from the anchor body (2) is fixedly connected with a guide cap (12), and an anti-pulling component (13) is arranged in an inner cavity of the guide cap (12);
the anchor body (2) comprises a plurality of steel cables (21), the steel cables (21) are annularly arranged, a grouting pipe (22) is arranged at the center of the ring, the grouting pipe (22) is spliced with the guide cap (12) and communicated with the inner cavity of the guide cap (12), and the steel cables (21) are fixedly connected with the guide cap (12);
the anchor tail (3) comprises an anchoring mechanism arranged outside the anchor hole (4), and the anchoring mechanism is fixedly connected with the steel strand (21).
2. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 1, wherein: the anti-pulling assembly (13) comprises a plurality of communicating grooves (131) formed in the side wall of the guide cap (12), and the communicating grooves (131) are communicated with the inner cavity of the guide cap (12); an anti-pulling tooth (132) is arranged in the communication groove (131), one end, far away from the pressure-bearing component (11), of the anti-pulling tooth (132) is hinged to the communication groove (131) through a hinge shaft (133), and a check component (136) is arranged at any end of the hinge shaft (133); one side of the anti-pulling teeth (132) facing the center of the guide cap (12) and the guide cap (12) are fixedly connected with an ejection spring (134), and the end head of one end, close to the pressure bearing assembly (11), of the anti-pulling teeth (132) is in limit connection with the communication groove (131) through a limiting rod (135).
3. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 2, wherein: the non-return component (136) comprises a non-return gear (1361), the non-return gear (1361) is fixedly connected with one end of the hinge shaft (133), and the non-return gear (1361) is coaxial with the hinge shaft (133); the check gear (1361) is in limit connection with a check spring piece (1362), and one end, far away from the check gear (1361), of the check spring piece (1362) is fixedly connected with the guide cap (12).
4. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 2, wherein: slip casting pipe (22) include body (221), body (221) orientation the one end of direction cap (12) with direction cap (12) sliding connection and intercommunication direction cap (12) inner chamber, body (221) are located one end rigid coupling in direction cap (12) has seal assembly (222), seal assembly (222) with gag lever post (135) butt.
5. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 4, wherein: the sealing assembly (222) comprises a base (2221) fixedly connected with the pipe body (221), one end, far away from the pipe body (221), of the base (2221) is connected with a sealing cover (2222) in a sliding mode, and the sealing cover (2222) is abutted to the limiting rod (135).
6. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 1, wherein: the pressure-bearing assembly (11) comprises a mounting plate (111) fixedly connected with the guide cap (12), the steel cable (21) and the grouting pipe (22) penetrate through the mounting plate (111), the steel cable (21) is fixedly connected with the mounting plate (111), and the grouting pipe (22) is connected with the mounting plate (111) in a sliding manner; mounting panel (111) are kept away from the one end of direction cap (12) has pressure-bearing plate (113) through a plurality of connecting rods (112) rigid coupling, pressure-bearing plate (113) are kept away from the one end rigid coupling of direction cap (12) has spiral muscle (114).
7. The novel pre-fabricated anchor head pressure type anchor cable structure of claim 6, wherein: the anchor body (2) is further provided with a reinforcing assembly (23), the reinforcing assembly (23) comprises a stringing ring (231) and a fixing ring (232), the stringing ring (231) and the fixing ring (232) are arranged in a staggered mode at intervals, and the steel strand (21) and the grouting pipe (22) penetrate through the fixing ring (232) and the stringing ring (231); the reinforcing assembly (23) further comprises a protective sleeve (233), one end of the protective sleeve (233) is fixedly connected with the pressure bearing plate (113), the other end of the protective sleeve (233) extends out of the anchor hole (4), and the stringing ring (231) and the fixing ring (232) are both arranged in the protective sleeve (233); the outer wall of the protective sleeve (233) is fixedly connected with a plurality of positioning frames (234) at equal intervals in the circumferential direction.
8. A construction method of a novel prefabricated anchor head pressure type anchor cable structure, the novel prefabricated anchor head pressure type anchor cable knot according to any one of claims 1 to 7, which is characterized by comprising the following construction steps:
s1, cleaning a field and positioning and drawing lines;
s2, manufacturing and assembling anchor cables;
s3, constructing anchor holes (4);
s4, installing an anchor cable;
s5, grouting;
s6, applying prestress and checking;
and S7, constructing anchor cable frame beams.
9. The construction method of the novel prefabricated anchor head pressure type anchor cable structure according to claim 8, wherein: in the step S3, the depth of the anchor hole (4) is longer than the anchor line by more than 50 cm; and cleaning the anchor hole (4) after construction.
10. The construction method of the novel prefabricated anchor head pressure type anchor cable structure according to claim 8, wherein: in the step S5, secondary hole cleaning is carried out before grouting; and completing grouting once, and starting grouting from the bottom until cement slurry naturally flows out of the anchor hole (4).
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| CN202111140082.6A CN113774932B (en) | 2021-09-28 | 2021-09-28 | Novel prefabricated anchor head pressure type anchor cable structure and construction method thereof |
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| GB331945A (en) * | 1929-04-19 | 1930-07-17 | Callenders Cable & Const Co | Improvements connected with the production of foundations for poles and the like |
| JP2000064759A (en) * | 1998-08-24 | 2000-02-29 | Nittoc Constr Co Ltd | Anchor method, ground improving method, and enlarged excavating equipment used therefor |
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|---|---|
| CN113774932B (en) | 2023-03-24 |
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