CN111945719A - Quick-assembly type tension-compression composite anchor rod and construction method thereof - Google Patents
Quick-assembly type tension-compression composite anchor rod and construction method thereof Download PDFInfo
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- CN111945719A CN111945719A CN202010896606.3A CN202010896606A CN111945719A CN 111945719 A CN111945719 A CN 111945719A CN 202010896606 A CN202010896606 A CN 202010896606A CN 111945719 A CN111945719 A CN 111945719A
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 238000007906 compression Methods 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 110
- 239000010959 steel Substances 0.000 claims abstract description 110
- 230000001965 increasing effect Effects 0.000 claims abstract description 40
- 238000004873 anchoring Methods 0.000 claims abstract description 30
- 239000004519 grease Substances 0.000 claims abstract description 25
- 238000005260 corrosion Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 16
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 12
- 241001330002 Bambuseae Species 0.000 claims description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 12
- 239000011425 bamboo Substances 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 4
- 238000010923 batch production Methods 0.000 abstract 1
- 210000002435 tendon Anatomy 0.000 description 22
- 239000010410 layer Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 9
- 238000007667 floating Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000005336 cracking Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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Abstract
The invention discloses a quick-assembly type tension-compression composite anchor rod and a construction method thereof. When the system is used, a first cylindrical bearing plate, a friction increasing plate and a guide cap are sleeved on a tension anchoring section of finish-rolled deformed steel bar in sequence, a grease bar and an anticorrosive sleeve are sleeved on the pressure-bearing anchoring section, a water-swelling rubber pipe and a water stop pipe are sleeved outside the anticorrosive sleeve at the junction with a structural layer, a spiral steel bar is sleeved at the bottom of a bent steel bar of the structural layer, the bearing plate and a second cylindrical bearing plate are sleeved at the top of the bent steel bar, all components are assembled, no welding component is needed, all components can realize standardized batch production, and the quality of all components of the system can be effectively ensured; the method is more convenient and fast in construction, can greatly save the construction period, and can obviously improve the corrosion resistance of the finish-rolled deformed steel bar.
Description
Technical Field
The invention relates to a quick-assembly type tension-compression composite anchor rod and a construction method thereof, belonging to the technical field of building construction.
Background
Theoretical research and engineering application prove that the bearing capacity of the tension-compression composite anchor rod is obviously improved under the condition of the same anchoring length. Because a large number of permanent anti-floating anchor rods are used for underground engineering, the tension-compression composite anchor rod used as a permanent anchoring structure for permanent engineering can generate great economic and social benefits.
Because the anti-floating anchor rod is mostly constructed underwater, and permanent engineering, a reliable construction technology needs to be adopted to ensure the quality of the anchor rod, including reliable bearing capacity, good rod body corrosion resistance and the like. A tension-compression composite anchor rod (patent number: ZL201420450678.5) adopts no anticorrosion measures, and a pressure bearing plate adopts welding construction, so that the tension-compression composite anchor rod is only suitable for temporary anchoring engineering. Therefore, the tension-compression composite anchor rod which can be quickly installed and constructed, is convenient for the mass production of anchor rod body system components, has reliable quality and can simplify the construction process is researched and developed, and the tension-compression composite anchor rod has great significance for building engineering.
In addition, in the construction process of the conventional anchor rod, centering and guiding construction of the anchor rod (for example, steel bars) are extremely important, a guide cap is arranged at the end part of the anchor rod for guiding the anchor rod, the outer diameter of the conventional guide cap is mostly in a fixed size, and in the anchor rod drilling process, the diameter of the anchor rod is subjected to shaking of a drill rod, local collapse of the hole wall, deviation of the drill hole from the axial direction, small local drill hole diameter and other reasons, so that the anchor rod drilling is not equal in diameter, and phenomena such as local hole expansion or cable hole and inclined hole exist generally. Therefore, the following engineering accidents are easily caused in the process of drilling a hole below the anchor rod body by using the guide cap with the fixed diameter size: (1) the deviation of the anchor rod body from the axis causes the deviation of the axis of the steel bar and the axis of the anchor rod drilling hole, the stress of the anchor rod steel bar is seriously influenced, and great potential safety hazard is brought to engineering; (2) at the shrinkage cavity department, the direction cap diameter is greater than the drilling diameter, and the stock body of rod can't pass the shrinkage cavity section, leads to the stock body of rod can't put into the drilling, seriously influences the time limit for a project.
Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.
Disclosure of Invention
The invention aims to provide a quick-assembly type tension-compression composite anchor rod which has the advantages of simple structure, convenience in construction, capability of saving the construction period and good corrosion resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a compound stock is drawn and pressed to fast assembly formula, includes the stock body of rod, is provided with direction cap, first cylinder bearing plate, anticorrosive sleeve pipe and second cylinder bearing plate on the stock body of rod, and the stock body of rod forms bearing anchor section and tensile anchor section respectively in the upper and lower both sides of first cylinder bearing plate, still includes first friction increasing board and grease strip, be equipped with the external screw thread on the stock body of rod, first cylinder bearing plate with all be provided with on the first friction increasing board with the stock body of rod the interior screw that external screw thread cooperation was used, first cylinder bearing plate cover is established the design position of the stock body of rod, the grease strip is in twine in succession between first cylinder bearing plate to the second cylinder bearing plate the surface of the stock body of rod, the grease strip overcoat is equipped with anticorrosive sleeve pipe.
As a preferred aspect of the present invention, each of the first cylinder-type pressure-bearing plate and the second cylinder-type pressure-bearing plate includes a circular first pressure plate, a first internal screw tube, and a reinforcing rib plate connecting the first pressure plate and the first internal screw tube, and the bottom of the second cylinder-type pressure-bearing plate is sequentially provided with a pressure-bearing plate and a bent reinforcing bar.
As a preferable mode of the present invention, the first friction increasing plate includes a circular panel and a screw tube, the screw tube is screwed to the anchor rod body, the tension anchoring section is further provided with a second friction increasing plate, the second friction increasing plate includes a circular panel and a screw tube, the screw tube is screwed to the anchor rod body, and a plurality of bracket legs are provided on a side surface of the panel.
In a preferred form of the invention, the outer diameter of the pressure plate of the first cylindrical pressure bearing plate is 40-100mm smaller than the anchor bore diameter.
As a preferable mode of the present invention, the length of the first inner screw tube is such that the engaging bearing capacity of the first inner screw tube and the external thread of the anchor rod body is not lower than the tensile resistance of the anchor rod body.
As a preferable mode of the present invention, the outer diameter of the annular face plate is 40 to 100mm larger than the diameter of the anchor rod body, the anchor rod body is finish-rolled deformed steel bar, and the guide cap is screwed to the bottom of the anchor rod body.
As a preferred mode of the present invention, the guide cap includes a guide curved plate, a curved surface tapered strip, a rib plate, and a connecting cylinder, wherein an outer wall of the guide curved plate is curved hemispherical, the curved surface tapered strip is curved strip-shaped, the guide curved plate and the curved surface tapered strip are integrally connected to form a curved outer contour, the connecting cylinder is disposed in the guide curved plate, a fourth inner screw matched with the anchor rod is disposed on an inner wall of the connecting cylinder, and the connecting cylinder and the guide curved plate are connected by the rib plate.
As a preferable mode of the present invention, the support structure further includes a tendon tensioning bar, the first cylindrical bearing plate is provided with a first tendon passing hole, the support leg is provided with a second tendon passing hole, and the tendon tensioning bar is inserted into the first tendon passing hole and the second tendon passing hole and extends to the guide cap.
As a preferable mode of the present invention, the rib plate of the guide cap is provided with a connecting groove, an end portion of the tensile bar is inserted into the connecting groove, the number of the tensile bars is plural, and the plural tensile bars are uniformly arranged along the circumferential direction of the anchor rod body.
A construction method of a quick assembly type tension-compression composite anchor rod comprises the following construction steps:
A. assembling construction of pressure-bearing anchoring section part
Screwing the first cylinder type bearing plate into the finish-rolled deformed steel bar, enabling the pressing plate to face the top end of the finish-rolled deformed steel bar, and rotationally moving the first cylinder type bearing plate to a design position; taking the pressure plate as a starting point, and sequentially and continuously winding the grease strip on the surface of the finish-rolled deformed steel bar to the top end of the finish-rolled deformed steel bar until the position of the bearing plate below the second cylindrical bearing plate is finished; sleeving the anti-corrosion sleeve in the full-length range of the wound grease strip;
B. assembling construction of tension anchoring section component
Sequentially screwing the first friction increasing plate and the second friction increasing plate into a tensioned anchoring section of the finish-rolled deformed steel bar from the bottom end of the finish-rolled deformed steel bar, enabling the panel to point to the top of the finish-rolled deformed steel bar, screwing the first friction increasing plate and the second friction increasing plate, and moving to a design position according to a design interval;
C. assembly of guide cap
Sleeving the connecting cylinder of the guide cap into the bottom end of the finish-rolled deformed steel bar until the connecting cylinder is tightly stopped; finely adjusting the second friction-increasing plate and the first cylindrical bearing plate to enable the first rib penetrating hole and the second rib penetrating hole to correspond to the connecting groove of the guide cap, penetrating the tensioned steel bars from the first rib penetrating hole of the first cylindrical bearing plate, sequentially penetrating the tensioned steel bars to the second rib penetrating hole of the second friction-increasing plate, and stopping inserting the tensioned steel bars into the connecting groove;
D. anchor head part assembling construction
The guide cap is aligned with the center of the anchor rod drill hole and is lowered to the designed depth, and cement slurry is poured into the anchor rod drill hole; sequentially sleeving the water-swelling rubber tube and the water stop tube from the top end of the finish-rolled deformed steel bar at the position, corresponding to the hole opening of the anchor rod, on the ground; binding bottom steel bars, top steel bars, bent steel bars and the vertical stirrups of the structural layer; the spiral steel bar, the bearing plate and the second cylindrical bearing plate are sequentially sleeved from the top end of the finish-rolled deformed steel bar, so that the second cylindrical bearing plate presses against the bearing plate, the second pressure plate presses against the bent steel bar, and the spiral steel bar is fixed below the bearing plate in a centering manner;
E. pouring and pouring construction
And pouring concrete into the structural bottom plate to complete the whole construction process of the tension-compression composite anchor rod.
After the technical scheme of the invention is adopted, the construction of the quick-assembly tension-compression composite anchor rod has the following remarkable advantages: (1) the first cylindrical bearing plate is matched with the finish-rolled deformed steel bar for use, and can be quickly screwed to a designed position on the finish-rolled deformed steel bar to realize quick assembly; (2) the friction increasing plate and the finish rolling deformed steel bar are used in a matched mode, the design position of the tensioned anchoring section of the finish rolling deformed steel bar can be quickly screwed, and the effect of enhancing the bonding force of the finish rolling deformed steel bar and the cement paste is achieved; (3) the spiral steel bars can improve the local compression bearing capacity of the concrete at the bottom of the second cylindrical bearing plate; (4) the grease strip can be quickly wound on the finish-rolled deformed steel bar, and the corrosion resistance of the finish-rolled deformed steel bar of the pressure-bearing anchoring section is greatly improved by combining an anticorrosive sleeve; (5) all system components on the finish-rolled deformed steel bar are assembled and constructed, no welding component is needed, all components can be produced in a standardized and batch mode, the quality of all components of a system can be effectively guaranteed, construction is more convenient, and the construction period is greatly shortened; (6) in the junction of the anchor rod body and the structural layer outside the anti-corrosion sleeve, the water-swelling rubber pipe and the water stop pipe are sequentially sleeved, so that the anti-corrosion performance of the anchor rod is obviously improved.
Drawings
Fig. 1 is a sectional view showing the completion of construction according to a first embodiment of the present invention.
Fig. 2 is a sectional view of a first cylinder type pressure bearing plate of the present invention.
Fig. 3 is a plan view of the first cylinder type pressure bearing plate of the present invention.
Fig. 4 is a bottom view of the first cylinder type pressure bearing plate of the present invention.
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2 according to the present invention.
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 2 according to the present invention.
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 2 in accordance with the present invention.
Fig. 8 is a sectional view of a second cylinder type pressure bearing plate of the present invention.
Fig. 9 is a plan view of a second cylinder type pressure bearing plate of the present invention.
Fig. 10 is a bottom view of the second cylinder type pressure bearing plate of the present invention.
Fig. 11 is a cross-sectional view taken along line D-D of fig. 8 in accordance with the present invention.
Fig. 12 is an assembly construction drawing of the first cylinder type bearing plate node of the present invention.
Fig. 13 is a cross-sectional view E-E of fig. 12 in accordance with the present invention.
Fig. 14 is a sectional view F-F of fig. 12 in accordance with the present invention.
Fig. 15 is a sectional view taken along line G-G of fig. 12 in accordance with the present invention.
Fig. 16 is a sectional view taken along line H-H of fig. 12 in accordance with the present invention.
Fig. 17 is a sectional view of a first friction increasing plate according to the present invention.
FIG. 18 is a sectional view taken along line L-L of FIG. 17 in accordance with the present invention.
Fig. 19 is a cross-sectional view M-M of fig. 17 in accordance with the present invention.
Fig. 20 is a sectional view of a second friction increasing plate according to the present invention.
FIG. 21 is a cross-sectional view taken along line N-N of FIG. 20 in accordance with the present invention.
Fig. 22 is a connection diagram of the anchor rod body and the structural layer node according to the invention.
Fig. 23 is a cross-sectional view of a guide cap in accordance with the present invention engaging a bolt body.
FIG. 24 is a cross-sectional view taken at O-O of FIG. 23 in accordance with the present invention.
FIG. 25 is a cross-sectional view taken at P-P of FIG. 23 in accordance with the present invention.
FIG. 26 is a cross-sectional view taken at Q-Q of FIG. 23 in accordance with the present invention.
FIG. 27 is a cross-sectional view taken at R-R of FIG. 23 in accordance with the present invention.
Fig. 28 is a sectional view showing the completion of concrete construction of a structural layer according to a second embodiment of the present invention.
FIG. 29 is a sectional view of a second embodiment of the pre-stressed tension completion apparatus of the present invention.
In the figure:
100 first cylinder type bearing plate 101 first pressure plate 102 first inner screw cylinder
103 reinforcing rib 104 first inner screw 105 first rib penetrating hole
110 second cylinder type bearing plate 111 bearing plate 112 spiral reinforcing bar 113 second pressing plate
External screw thread at end of U-shaped cylinder 122 of 120 sealing cylinder 121
123U-shaped cover plate 124, second inner screw 125, through hole 126 and sealing ring
127 lower slurry discharging pipe 128 upper gas discharging pipe
130 simple jack 131 oil cylinder 132 oil jack 133 pressure disc
135 oil stop valve of 134 oil inlet pipe
200 finish rolling deformed steel bar 201 external thread 202 grease bar 203 anticorrosion sleeve
210 first friction increasing plate 211, panel 212, screw tube 213 and third internal screw
220 second friction-increasing plate 221 support leg 222 second reinforcement through hole 223 tension reinforcement
230 water stop pipe 231 wing plate 232 round pipe 233 water-swelling rubber pipe
240 cement slurry
300 guide cap 301 guide curved plate 302 curved surface reducing strip
303 rib plate 304 connecting cylinder 305 connecting groove 306 fourth internal screw
310 anchor bolt drilling
400 structural layer 401 bottom layer reinforcing steel bar 402 top layer reinforcing steel bar 403 bent reinforcing steel bar
404 vertical stirrup 405 concrete 406 cushion
Detailed Description
In order to further explain the technical solution of the present invention, the following detailed description is made with reference to the embodiments. Referring to fig. 1 to 27 (in the embodiment, the bolt body is finish-rolled deformed steel bar 200, and only one finish-rolled deformed steel bar 200 is illustrated as a rib body), a first embodiment of the present invention provides a quick-assembly tension-compression composite bolt, which includes: the finish-rolled deformed steel bar 200, the first cylinder type bearing plate 100, the first friction increasing plate 210, the second friction increasing plate 220, the grease bar 202, the corrosion-resistant sleeve 203, and the guide cap 300. The guide cap 300 is arranged at the lower end of the finish rolling deformed steel bar 200, the upper end of the finish rolling deformed steel bar 200 is provided with a structural layer 400, the structural layer 400 comprises a bottom reinforcing steel bar 401, a top reinforcing steel bar 402, vertical stirrups 404 arranged between the bottom reinforcing steel bar 401 and the top reinforcing steel bar 402 and bent-up reinforcing steel bars 403 arranged at the top layer, the bent-up reinforcing steel bars 403 are provided with bearing plates 111, and the bearing plates 111 are sleeved on the finish rolling deformed steel bar 200 and locked and pressed on the bent-up reinforcing steel bars 403 through second cylinder type bearing plates 110.
In the present invention, the surface of the finish-rolled deformed steel bar 200 has external threads 201, the inner walls of the first cylinder type bearing plate 100, the second cylinder type bearing plate 110, the first friction increasing plate 210, the second friction increasing plate 220, and the guide cap 300 are provided with internal threads used in cooperation with the external threads 201 of the finish-rolled deformed steel bar 200, and the first friction increasing plate 210 and the second friction increasing plate 220 are arranged at intervals of 2 to 4 m. Grease strip 202 is the felt of adsorbed grease, grease strip 202 twines in succession between first cylinder bearing plate 100 to bearing plate 111 the 200 surfaces of finish rolling screw-thread steel, grease strip 202 overcoat is equipped with anticorrosive sleeve 203, at the stock body of rod and structural layer 400 juncture anticorrosive sleeve 203 outside, the cover is equipped with in proper order meet water inflation rubber tube 233 and stagnant water pipe 230. Wherein water-swellable rubber tube 233 is made of a well-known water-swellable rubber material. In the present invention, a spiral reinforcing bar 112 is further provided under the pressure-bearing plate 111 under the second cylinder-type pressure-bearing plate 110.
Referring to fig. 2 to 29, a second embodiment of the present invention provides a prestressed tension-compression composite anti-floating anchor rod, which is different from the first embodiment in that: still including setting up the sealed section of thick bamboo 120 at the stock body of rod top, sealed section of thick bamboo 120 is the cylindric of the inside cavity that U type section of thick bamboo 121 and U type apron 123 spiro union become, and specifically the outer wall of U type section of thick bamboo 121 is equipped with end external screw 122, and the inner wall of U type apron 123 is equipped with the second internal screw 124 with end external screw 122 complex, and the cover is equipped with simple and easy jack 130 and second cylinder bearing plate 110 on the stock body of rod in the sealed section of thick bamboo 120, is equipped with pressure disc 133 on the oil top 132 of simple and easy jack 130, and pressure disc 133 corresponds second cylinder bearing plate 110 sets up, is connected with into oil pipe on simple and easy jack 130, advances oil pipe 134 and stretches out sealed section of thick bamboo 120, advances oil pipe 134 and stretches out the position of sealed section. The sealing cylinder 120 is provided with a lower slurry pipe 127 and an upper exhaust pipe 128 communicating with the outside.
In the first embodiment and the second embodiment of the present invention, the same structure is adopted if the following components are involved.
First cylinder bearing plate 100 comprises annular first clamp plate 101, first interior screw section of thick bamboo 102 and reinforcing plate 103, and first clamp plate 101 sets up in the axial one end of first interior screw section of thick bamboo 102 and sets up with first interior screw section of thick bamboo 102 is perpendicular, the inner wall of first interior screw section of thick bamboo 102 be provided with finish rolling screw-thread steel 200 the first interior screw 104 that external screw 201 cooperation was used, first cylinder bearing plate 100 first clamp plate 101 is fitted with a contraceptive ring and is equipped with first muscle hole 105. The second cylinder type pressure bearing plate 110 is composed of an annular second pressure plate 113, a first inner screw cylinder 102 and a reinforcing plate 103. Preferably, the outer diameter of the first pressure plate 101 of the first barrel pressure plate 100 is 40-100mm smaller than the anchor bore 310 diameter. Preferably, the length of the first inner screw tube 102 of the first barrel type bearing plate 100 is such that the engagement bearing capacity of the first inner screw 104 with the external thread 201 of the finish-rolled deformed steel bar 200 is not lower than the tensile resistance of the finish-rolled deformed steel bar 200. Preferably, the second presser plate 113 of the second cylinder-type pressure bearing plate 110 is not provided with the first bead penetrating holes 105. Preferably, the diameter of the first lacing holes 105 is 7-16 mm.
The first friction increasing plate 210 is composed of an annular panel 211 and a screw cylinder 212, the second friction increasing plate 220 is composed of an annular panel 211, a screw cylinder 212, a support leg 221 and a second rib penetrating hole 222, the panel 211 is arranged at one axial end of the screw cylinder 212 and is perpendicular to the screw cylinder 212, a third inner screw 213 matched with the external thread 201 of the finish-rolled threaded steel 200 is arranged on the inner wall of the screw cylinder 212, the support leg 221 is annularly arranged on the outer side of the panel 211, the second rib penetrating hole 222 is arranged in the support leg 221, and the number of the second rib penetrating holes 222 is matched with the number and the interval of the first rib penetrating holes 105 of the first cylinder type pressure bearing plate 100. Preferably, the diameter of the face plate 211 is 40 to 100mm larger than the diameter of the finish-rolled deformed steel bar 200. Preferably, the diameter of the second lacing holes 222 is 7-16 mm. Preferably, the width of the support leg 221 is 15-25 mm.
The water stop pipe 230 is composed of a circular pipe 232 and annular wing plates 231, and the wing plates 231 are arranged at two axial ends of the circular pipe 232 and perpendicular to the circular pipe 232.
Referring to fig. 23-27 (only four curved reducing bars 302 are illustrated), the present invention provides a self-reducing guide cap for an anchor rod, which comprises a guide curved plate 301, curved reducing bars 302, ribs 303, a connecting barrel 304 and a connecting groove 305. The outer wall of the guide curved plate 301 is in a curved hemispherical shape, the curved reducing strips 302 are curved strip shapes which are annularly arranged around the axial direction of the guide cap, the guide curved plate 301 and the curved reducing strips 302 are connected into a whole, the contour lines of the guide curved plate and the curved reducing strips 302 are in a curved shape, and the outer diameters of the contour lines are gradually increased along the top of the guide curved plate 301 towards the direction of the curved reducing strips 302. A connecting cylinder 304 is arranged in the middle of the inside of the guide curved plate 301, the connecting cylinder 304 is arranged along the center line of the guide curved plate 301, a fourth internal screw 306, specifically the fourth internal screw 306, which is used in cooperation with the external thread 201 on the surface of the finish-rolled deformed steel bar 200 is arranged on the inner wall of the connecting cylinder 304, the connecting cylinder 304 is connected with the guide curved plate 301 by the ribbed plate 303, and in the embodiment, 4 ribbed plates 303 are shown.
Preferably, the maximum outer diameter of the guiding curved plate 301 is 0.5-0.6 times of the diameter of the anchor hole 4, and the maximum outer diameter of the circumference of the curved reducing strip 302 is 1.0-1.4 times of the diameter of the anchor hole 10.
Preferably, the width of the curved surface variable diameter strip 302 is 30-100 mm.
Preferably, the rib 303 is annularly provided between the connecting cylinder 304 and the guide curved plate 301.
Preferably, the inside diameter of the connecting cylinder 304 corresponds to the outside diameter of the finish-rolled deformed steel bar 200, and the finish-rolled deformed steel bar 200 may be directly screwed into the connecting cylinder 304 and fastened.
Preferably, the rib 303 is provided with a connecting groove 305, and the inner diameter of the connecting groove 305 is 7-16 mm.
Preferably, the connecting slots 305 are matched with the number and the spacing of the first through-rib holes 105.
Preferably, the height of the connecting cylinder 304 is 50-200mm higher than the height of the rib plate 303.
Preferably, a tendon 223 is inserted and fixed into the connection groove 305, the second tendon passing hole 222 of the second friction-increasing plate 220, and the first tendon passing hole 105 of the first cylinder-type pressure-bearing plate 100. According to the self-reducing guide cap for the tension-compression composite anchor rod, the anchor rod body (finish-rolled deformed steel bar 200) can be directly screwed in the connecting cylinder 304, and the guide curved plate 301 can ensure that the finish-rolled deformed steel bar 200 has a reliable protective layer thickness in the process of placing the anchor rod drilling hole 310 below the anchor rod body; when the diameter of the anchor rod drilling hole 310 is changed within a certain range due to construction, the curved surface variable diameter strip 302 has good flexibility, and the outer diameter of the curved surface variable diameter strip 302 is larger than the maximum outer diameter of the guide curved plate 301, so that the curved surface variable diameter strip can be compressed or extended in the radial direction of the diameter of the anchor rod drilling hole 310, can be well adapted to the change of the diameter of the anchor rod drilling hole 310, and can always ensure that the finish-rolled deformed steel bar 200 is positioned in the middle of the anchor rod drilling hole 310. The invention has the characteristics of simple and reliable device, quick construction and strong adaptability. In the present invention, the tendon 223 sequentially passes through the first tendon passing hole 105 of the first cylindrical bearing plate 100 and the second tendon passing hole 222 of the second friction plate 220 and then is inserted into the connection groove 305 of the guide cap 300, and the grease bar 202 is sequentially wound around the outer surface of the finish-rolled deformed steel bar 200 between the first cylindrical bearing plate 100 and the bearing plate 111 under the second cylindrical bearing plate 110 and the corrosion-resistant sleeve 203 is sleeved thereon. Because the design standard period of the anti-floating anchor is not less than the building design standard period, generally not less than 50 years, in order to prevent the grout of the tensioned anchoring section from cracking due to tension and then causing corrosion of the body of the anchor rod and the like, so as to reduce the durability and even endanger the safety of the anchoring project, the invention also comprises a tension bar 223 arranged in the grout of the tensioned anchoring section, the invention directly arranges a first rib penetrating hole 105 on the first cylinder type bearing plate 100, arranges a second rib penetrating hole 222 on the second friction increasing plate 220, and the tension bar 223 penetrates through the first rib penetrating hole 105 and the second rib penetrating hole 222 and extends into a connecting groove 305 of the guide cap 300.
Preferably, the top end of the tension bar 223 is exposed out of the first presser plate 101 of the first barrel type bearing plate 100 by a height 2 to 4 times the diameter of the anchor bore 310.
Corresponding to a first implementation mode, the invention provides a construction method of a quick assembly type tension-compression composite anti-floating anchor rod, which comprises the following construction steps:
A. assembling construction of pressure-bearing anchoring section part
Screwing the first cylinder type pressure bearing plate 100 into the finish-rolled deformed steel bar 200 and rotationally moving the first cylinder type pressure bearing plate 100 to a design position with the first presser plate 101 facing the top end of the finish-rolled deformed steel bar 200; the grease bars 202 are sequentially and continuously wound on the surface of the finish-rolled deformed steel bar 200 toward the top end of the finish-rolled deformed steel bar 200 from the first presser plate 101 to the position of the pressure receiving plate 111 below the second cylinder-type pressure receiving plate 110; sleeving the anti-corrosion sleeve 203 in the full-length range of the wound grease strip 202;
B. assembling construction of tension anchoring section component
Sequentially screwing the first friction increasing plate 210 and the second friction increasing plate 220 into the tension anchoring section of the finish-rolled deformed steel bar 200 from the bottom end of the finish-rolled deformed steel bar 200, enabling the panel 211 to point to the top of the finish-rolled deformed steel bar 200, screwing the first friction increasing plate 210 and the second friction increasing plate 220, and moving to a design position according to a design interval;
C. assembly of guide cap
Sleeving the connecting cylinder 304 of the guide cap 300 into the bottom end of the finish-rolled deformed steel bar 200 until the connection cylinder is tightly stopped; fine-adjusting the second friction-increasing plate 220 and the first cylindrical bearing plate 100 such that the first tendon passing hole 105 and the second tendon passing hole 222 correspond to the connecting groove 305 of the guide cap 300, and the tendon 223 is inserted from the first tendon passing hole 105 of the first cylindrical bearing plate 100, sequentially inserted through the second tendon passing hole 222 of the second friction-increasing plate 220, and stopped by being tightly inserted into the connecting groove 305;
D. anchor head part assembling construction
The guide cap 300 is aligned with the center of the anchor rod drilling hole 310 and is lowered to a designed depth, and cement slurry 240 is poured into the anchor rod drilling hole 310; the water-swelling rubber tube 233 and the water stop tube 230 are sleeved in sequence from the top end of the finish-rolled deformed steel bar 200 at the position corresponding to the hole opening of the anchor rod drilling hole 310 on the ground; binding the bottom rebars 401, the top rebars 402, the bent rebars 403, and the vertical stirrups 95 of the structural layer 400; the spiral steel bar 112, the bearing plate 111 and the second cylindrical bearing plate 110 are sequentially sleeved from the top end of the finish-rolled deformed steel bar 200, so that the second cylindrical bearing plate 110 presses against the bearing plate 111, the bearing plate 111 presses against the bent steel bar 403, and the spiral steel bar 112 is fixed below the bearing plate 111 in a centering manner;
E. pouring and pouring construction
And pouring concrete 405 into the structural layer 400, thus completing the whole construction process of the tension-compression composite anti-floating anchor rod.
According to the rapidly-assembled tension-compression composite anchor rod and the construction method thereof, all parts are assembled, no welding part is needed, all parts can be produced in a standardized and batch mode, and the quality of all parts of a system can be effectively guaranteed; all components are assembled, assembled and constructed, so that the construction is more convenient and fast, and the construction period can be greatly shortened; the finish-rolled deformed steel bar is doubly protected by the grease strip and the anti-corrosion sleeve on the pressure-bearing anchoring section, and the tension steel bar is annularly arranged on the finish-rolled deformed steel bar on the tension anchoring section, so that the tensile bearing capacity of cement paste of the tension anchoring section is improved, the corrosion of the finish-rolled deformed steel bar caused by the cracking of the cement paste is avoided, the anti-corrosion performance of the finish-rolled deformed steel bar is obviously improved, and the anti-corrosion device can be well suitable for permanent anchoring projects such as anti-floating anchor rods and side slope support anchor rods.
Corresponding to a second implementation mode, the invention provides a construction method of a prestress tension-compression composite anti-floating anchor rod, which comprises the following construction steps:
A. assembling construction of pressure-bearing anchoring section part
Screwing the first cylinder type pressure bearing plate 100 into the finish-rolled deformed steel bar 200 and rotationally moving the first cylinder type pressure bearing plate 100 to a design position with the first presser plate 101 facing the top end of the finish-rolled deformed steel bar 200; taking the first pressing plate 101 as a starting point, sequentially and continuously winding the grease strips 202 on the surface of the anchor rod body towards the top direction of the anchor rod body, winding the grease strips 202 to the designed position of the second cylindrical bearing plate 110, and sleeving the anti-corrosion sleeve 203 outside the anchor rod body corresponding to the grease strips 202;
B. assembling construction of tension anchoring section component
Sequentially screwing the first friction increasing plate 210 and the second friction increasing plate 220 into the tension anchoring section of the finish-rolled deformed steel bar 200 from the bottom end of the finish-rolled deformed steel bar 200, pointing the face plate 211 to the top of the finish-rolled deformed steel bar 200, screwing the first friction increasing plate 210 and the second friction increasing plate 220, and moving to a design position according to a design interval;
C. assembly of guide cap
Sleeving the connecting cylinder 304 of the guide cap 300 into the bottom end of the finish-rolled deformed steel bar 200 until the connection cylinder is tightly stopped; fine-adjusting the second friction-increasing plate 220 and the first cylindrical bearing plate 100 such that the first tendon passing hole 105 and the second tendon passing hole 222 correspond to the connecting groove 305 of the guide cap 300, and the tendon 223 is inserted from the first tendon passing hole 105 of the first cylindrical bearing plate 100, sequentially inserted through the second tendon passing hole 222 of the second friction-increasing plate 220, and stopped by being tightly inserted into the connecting groove 305;
D. sealing cylinder assembling construction
Sleeving a sealing ring 126 and a U-shaped cylinder 121 on the top of the finish-rolled deformed steel bar 200 to a designed position, then sequentially installing a simple jack 130 and a second cylinder type bearing plate 110 at the bottom of the U-shaped cylinder 121, lowering an oil jack 132 of the simple jack 130 to the lowest position, pressing the second cylinder type bearing plate 110 against the oil jack 132, and sequentially connecting an oil inlet pipe 134 and a lower slurry pipe 127 of the simple jack 130 to the top surface of the exposed structural layer 400 through a connecting pipe arranged at an adapter port of the U-shaped cylinder 121; screwing the U-shaped cover plate 123 into the top of the U-shaped cylinder 121 to connect the upper exhaust pipe 128 to the top surface of the exposed structure;
E. construction of structural layer
Binding the steel bars in the structural layer 400, fixing the sealing barrel 120 by using the steel bars, and then pouring concrete 405 into the structural layer;
F. prestressed tension
After the concrete 405 of the structural layer 400 is cured to meet the design requirement, an oil pump is used for pressing hydraulic oil into the simple jack 130 through the oil inlet pipe 134, when the oil pressure reaches the pressure value calibrated by the design prestress, the oil stop valve 135 is closed, and meanwhile, cement slurry 240 (specifically, cement slurry with the water-cement ratio of 0.45-0.6) is injected into the sealing cylinder 123 through the lower slurry injection pipe 127 until the upper exhaust pipe 128 continuously overflows the cement slurry 240, and the grouting is stopped; when the strength maintenance of the cement slurry 240 meets the design requirements, the exposed lower grouting pipe 127, the exposed upper exhaust pipe 128 and the exposed oil inlet pipe 134 are removed.
The product form of the present invention is not limited to the embodiments, and any suitable changes or modifications of the similar ideas by anyone should be considered as not departing from the patent scope of the present invention.
Claims (10)
1. The utility model provides a compound stock is drawn to fast assembly formula, includes the stock body of rod, is provided with direction cap, first cylinder bearing plate, anticorrosive sleeve pipe and second cylinder bearing plate on the stock body of rod, and the stock body of rod forms pressure-bearing anchoring section and draw anchoring section, its characterized in that respectively in the upper and lower both sides of first cylinder bearing plate: still include first friction increasing plate and grease strip, be equipped with the external screw thread on the stock body of rod, first cylinder bearing plate with all be provided with on the first friction increasing plate with the stock body of rod the interior screw that external screw thread cooperation was used, first cylinder bearing plate cover is established the design position of the stock body of rod, the grease strip is in twine in succession between first cylinder bearing plate to the second cylinder bearing plate the surface of the stock body of rod, the grease strip overcoat is equipped with anticorrosive sleeve pipe.
2. A quick-assembly tension-compression composite anchor rod as claimed in claim 1, wherein: first cylinder bearing plate and second cylinder bearing plate all include annular first clamp plate, first interior screw section of thick bamboo and connect the first clamp plate and the reinforced floor of first interior screw section of thick bamboo, the bottom of second cylinder bearing plate has set gradually bearing plate and has bent up the reinforcing bar.
3. A quick-assembly tension-compression composite anchor rod as claimed in claim 2, wherein: the first friction increasing plate comprises a circular panel and a screw tube, the screw tube is screwed on the anchor rod body, a second friction increasing plate is further arranged on the tensioned anchoring section and comprises a circular panel and a screw tube, the screw tube is screwed on the anchor rod body, and a plurality of support legs are arranged on the side face of the panel.
4. A quick-assembly tension-compression composite anchor rod as claimed in claim 3, wherein: the outer diameter of the pressure plate of the first cylindrical pressure bearing plate is 40-100mm smaller than the anchor rod drilling diameter.
5. A quick-assembly tension-compression composite anchor rod as claimed in claim 4, wherein: the length of the first inner screw tube meets the requirement that the engaging bearing capacity of the first inner screw tube and the external thread of the anchor rod body is not lower than the tensile resistance of the anchor rod body.
6. A quick-assembly tension-compression composite anchor rod as claimed in claim 5, wherein: the outer diameter of the circular panel is 40-100mm larger than the diameter of the anchor rod body, the anchor rod body is made of finish-rolled deformed steel bar, and the guide cap is in threaded connection with the bottom of the anchor rod body.
7. A quick-assembly tension-compression composite anchor rod as claimed in claim 6, wherein: the guide cap comprises a guide curved plate, a curved surface reducing strip, a rib plate and a connecting cylinder, wherein the outer wall of the guide curved plate is semi-spherical, the curved surface reducing strip is in a curved surface strip shape, the guide curved plate and the curved surface reducing strip are connected into a whole and form a curved surface outline, the connecting cylinder is arranged in the guide curved plate, the inner wall of the connecting cylinder is provided with a fourth inner screw matched with the anchor rod for use, and the connecting cylinder is connected with the guide curved plate through the rib plate.
8. A quick-assembly tension-compression composite anchor rod as claimed in claim 7, wherein: the first cylinder type bearing plate is provided with a first rib penetrating hole, the support legs are provided with second rib penetrating holes, and the tension steel bar penetrates through the first rib penetrating hole and the second rib penetrating holes and extends to the guide cap.
9. A quick-assembly tension-compression composite anchor rod as claimed in claim 8, wherein: the rib plate of the guide cap is provided with a connecting groove, the end part of the tensile steel bar penetrates through the connecting groove, the number of the tensile steel bars is multiple, and the multiple tensile steel bars are uniformly distributed along the circumferential direction of the anchor rod body.
10. The construction method of the quick assembly type tension-compression composite anchor rod as claimed in claim 9, characterized by comprising the following construction steps:
A. assembling construction of pressure-bearing anchoring section part
Screwing the first cylinder type bearing plate into the finish-rolled deformed steel bar, enabling the pressing plate to face the top end of the finish-rolled deformed steel bar, and rotationally moving the first cylinder type bearing plate to a design position; taking the pressure plate as a starting point, and sequentially and continuously winding the grease strip on the surface of the finish-rolled deformed steel bar to the top end of the finish-rolled deformed steel bar until the position of the bearing plate below the second cylindrical bearing plate is finished; sleeving the anti-corrosion sleeve in the full-length range of the wound grease strip;
B. assembling construction of tension anchoring section component
Sequentially screwing the first friction increasing plate and the second friction increasing plate into a tensioned anchoring section of the finish-rolled deformed steel bar from the bottom end of the finish-rolled deformed steel bar, enabling the panel to point to the top of the finish-rolled deformed steel bar, screwing the first friction increasing plate and the second friction increasing plate, and moving to a design position according to a design interval;
C. assembly of guide cap
Sleeving the connecting cylinder of the guide cap into the bottom end of the finish-rolled deformed steel bar until the connecting cylinder is tightly stopped; finely adjusting the second friction-increasing plate and the first cylindrical bearing plate to enable the first rib penetrating hole and the second rib penetrating hole to correspond to the connecting groove of the guide cap, penetrating the tensioned steel bars from the first rib penetrating hole of the first cylindrical bearing plate, sequentially penetrating the tensioned steel bars to the second rib penetrating hole of the second friction-increasing plate, and stopping inserting the tensioned steel bars into the connecting groove;
D. anchor head part assembling construction
The guide cap is aligned with the center of the anchor rod drill hole and is lowered to the designed depth, and cement slurry is poured into the anchor rod drill hole; sequentially sleeving the water-swelling rubber tube and the water stop tube from the top end of the finish-rolled deformed steel bar at the position, corresponding to the hole opening of the anchor rod, on the ground; binding bottom steel bars, top steel bars, bent steel bars and the vertical stirrups of the structural layer; the spiral steel bar, the bearing plate and the second cylindrical bearing plate are sequentially sleeved from the top end of the finish-rolled deformed steel bar, so that the second cylindrical bearing plate presses against the bearing plate, the second pressure plate presses against the bent steel bar, and the spiral steel bar is fixed below the bearing plate in a centering manner;
E. pouring and pouring construction
And pouring concrete into the structural bottom plate to complete the whole construction process of the tension-compression composite anchor rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896606.3A CN111945719A (en) | 2020-08-31 | 2020-08-31 | Quick-assembly type tension-compression composite anchor rod and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896606.3A CN111945719A (en) | 2020-08-31 | 2020-08-31 | Quick-assembly type tension-compression composite anchor rod and construction method thereof |
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| CN111945719A true CN111945719A (en) | 2020-11-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202559345U (en) * | 2012-02-23 | 2012-11-28 | 山东同圆设计集团有限公司 | Bottom-expanded pre-stress anti-floating anchor rod |
| US20180002885A1 (en) * | 2016-07-04 | 2018-01-04 | PoweChina Huadong Engineering Corporation Limited | Rock anchor foundation structure suitable for mountain photovoltaic module and construction method of rock anchor foundation structure |
| CN109778852A (en) * | 2019-03-29 | 2019-05-21 | 华侨大学 | A kind of T-type connection sleeve and anchor pole for tension and compression composite anchor-rod |
| WO2020151347A1 (en) * | 2019-01-24 | 2020-07-30 | 深圳市地质环境研究院有限公司 | Prefabricated prestressed anchor structure |
| CN212452621U (en) * | 2020-08-31 | 2021-02-02 | 华侨大学 | Quick-assembly type tension-compression composite anchor rod |
-
2020
- 2020-08-31 CN CN202010896606.3A patent/CN111945719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202559345U (en) * | 2012-02-23 | 2012-11-28 | 山东同圆设计集团有限公司 | Bottom-expanded pre-stress anti-floating anchor rod |
| US20180002885A1 (en) * | 2016-07-04 | 2018-01-04 | PoweChina Huadong Engineering Corporation Limited | Rock anchor foundation structure suitable for mountain photovoltaic module and construction method of rock anchor foundation structure |
| WO2020151347A1 (en) * | 2019-01-24 | 2020-07-30 | 深圳市地质环境研究院有限公司 | Prefabricated prestressed anchor structure |
| CN109778852A (en) * | 2019-03-29 | 2019-05-21 | 华侨大学 | A kind of T-type connection sleeve and anchor pole for tension and compression composite anchor-rod |
| CN212452621U (en) * | 2020-08-31 | 2021-02-02 | 华侨大学 | Quick-assembly type tension-compression composite anchor rod |
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