CN111945719B - A fast-assembly tension-compression composite anchor rod and construction method thereof - Google Patents
A fast-assembly tension-compression composite anchor rod and construction method thereof Download PDFInfo
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- CN111945719B CN111945719B CN202010896606.3A CN202010896606A CN111945719B CN 111945719 B CN111945719 B CN 111945719B CN 202010896606 A CN202010896606 A CN 202010896606A CN 111945719 B CN111945719 B CN 111945719B
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000007906 compression Methods 0.000 title claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 128
- 239000010959 steel Substances 0.000 claims abstract description 128
- 230000001965 increasing effect Effects 0.000 claims abstract description 47
- 238000004873 anchoring Methods 0.000 claims abstract description 27
- 239000004519 grease Substances 0.000 claims abstract description 26
- 238000005260 corrosion Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 235000012149 noodles Nutrition 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 52
- 238000003466 welding Methods 0.000 abstract description 4
- 238000010923 batch production Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 35
- 239000010410 layer Substances 0.000 description 27
- 238000003825 pressing Methods 0.000 description 21
- 238000005553 drilling Methods 0.000 description 20
- 238000013461 design Methods 0.000 description 17
- 239000003921 oil Substances 0.000 description 17
- 238000007667 floating Methods 0.000 description 11
- 238000007789 sealing Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005452 bending Methods 0.000 description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 210000002435 tendon Anatomy 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a quick assembly type pull-press composite anchor rod and a construction method thereof, comprises finish rolling screw thread steel, a first cylinder bearing plate, a friction increasing plate, grease strips, an anti-corrosion sleeve, a water-swelling rubber tube, a water stopping tube and a guide cap. When the system is used, the tension anchoring section of the finish rolling screw steel is sequentially sleeved with the first cylinder bearing plate, the friction increasing plate and the guide cap, the pressure anchoring section is sleeved with the grease strip and the anti-corrosion sleeve, the anti-corrosion sleeve at the junction with the structural layer is sleeved with the water-swelling rubber pipe and the water-stop pipe, the bottom of the bent steel bar of the structural layer is sleeved with the spiral steel bar and the top of the bent steel bar of the structural layer is sleeved with the bearing plate and the second cylinder bearing plate, all the parts are assembled, no welding parts exist, standardized batch production can be realized for all the parts, the quality of all the parts of the system can be effectively ensured, the construction is more convenient, the construction period can be greatly saved, and the anti-corrosion performance of the finish rolling screw steel can be remarkably improved.
Description
Technical Field
The invention relates to a quick assembly type pull-press composite anchor rod and a construction method thereof, and belongs to the technical field of building construction.
Background
Proved by theoretical research and engineering application, the tensile-compression composite anchor rod (patent number: ZL 201420450678.5) has obviously improved bearing capacity under the condition of the same anchoring length. Because a large number of permanent anti-floating anchors are used for underground engineering, the application of the tension-compression composite anchor rod 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 is permanently engineered, reliable construction technology is needed to ensure the quality of the anchor rod, and the anti-floating anchor rod comprises reliable bearing capacity, good rod body corrosion resistance and the like. A pull-press composite anchor rod (patent number: ZL 201420450678.5) does not adopt an anti-corrosion measure, and a pressure bearing plate adopts welding construction, so that the pull-press composite anchor rod is only suitable for temporary anchoring engineering. Therefore, the pulling and pressing composite anchor rod which can be quickly installed and constructed and is convenient for mass production of the anchor rod system components is developed, has reliable quality, can simplify the construction process and has great significance for constructional engineering.
In addition, in the construction process of the existing anchor rod, the centering and guiding construction of the anchor rod (such as a steel bar) is extremely important, a guide cap is arranged at the end part of the anchor rod for guiding the anchor rod, and the outer diameter of the existing guide cap is mostly of a fixed size. Therefore, in the process of drilling holes in the lower part of the anchor rod body by using the guide cap with the fixed diameter, engineering accidents are easy to occur, namely (1) the anchor rod body deviates from the axis, so that the axis of the reinforcing steel bar deviates from the axis of the drilling holes of the anchor rod, the stress of the reinforcing steel bar of the anchor rod is seriously influenced, and a large potential safety hazard is brought to the engineering, and (2) the diameter of the guide cap is larger than that of the drilling holes in the shrinkage hole, so that the anchor rod body cannot pass through the shrinkage hole section, and the construction period is seriously influenced.
In view of this, the present inventors have conducted intensive studies on the above problems, and have produced the present invention.
Disclosure of Invention
The invention aims to provide a quick assembly type pulling and pressing composite anchor rod, which has the advantages of simple structure, convenient construction, construction period saving and good corrosion resistance.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a compound stock is pressed to quick assembled formula draws, includes the stock body, is provided with direction cap, first barrel bearing plate, anticorrosive sleeve pipe and second barrel bearing plate on the stock body, and the stock body forms pressure-bearing anchor section and draws anchor section respectively in the upper and lower both sides of first barrel bearing plate, still includes first friction increasing plate and grease strip, be equipped with the external screw thread on the stock body, first barrel bearing plate with all be provided with on the first friction increasing plate with the internal screw that the external screw thread cooperation of stock body was used, first barrel bearing plate cover is established the design position of stock body, the grease strip is in between first barrel bearing plate to the second barrel bearing plate twine in succession the surface of stock body, the grease strip overcoat is equipped with anticorrosive sleeve pipe.
As a preferable mode of the invention, the first cylinder bearing plate and the second cylinder bearing plate comprise annular first pressing plates, first inner screw cylinders and reinforcing rib plates for connecting the first pressing plates and the first inner screw cylinders, and the bottoms of the second cylinder bearing plates are sequentially provided with the bearing plates and bent reinforcing bars.
As a preferable mode of the invention, the first friction increasing plate comprises a circular panel and a screw cylinder, the screw cylinder is in threaded connection with the anchor rod body, the tension anchoring section is also provided with a second friction increasing plate, the second friction increasing plate comprises a circular panel and a screw cylinder, the screw cylinder is in threaded connection with the anchor rod body, and the side surface of the panel is provided with a plurality of support legs.
As a preferred mode of the present invention, the outer diameter of the platen of the first barrel type bearing plate is 40-100mm smaller than the anchor rod drilling diameter.
As a preferable mode of the invention, the length of the first inner screw cylinder meets the condition that the engagement bearing capacity of the first inner screw cylinder 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 invention, the outer diameter of the annular panel is 40-100mm larger than the diameter of the anchor rod body, the anchor rod body is made of finish-rolled screw steel, and the guide cap is in threaded connection with the bottom of the anchor rod body.
As a preferable mode of the invention, the guide cap comprises a guide curved plate, a curved diameter-changing strip, a rib plate and a connecting cylinder, wherein the outer wall of the guide curved plate is in a curved hemispherical shape, the curved diameter-changing strip is in a curved surface strip shape, the guide curved plate and the curved diameter-changing strip are connected into a whole to form a curved outer contour, the connecting cylinder is arranged in the guide curved plate, a fourth inner screw matched with an anchor rod is arranged on the inner wall of the connecting cylinder, and the connecting cylinder is connected with the guide curved plate by adopting the rib plate.
As a preferable mode of the invention, the invention further comprises a tension steel bar, wherein a first bar penetrating hole is formed in the first cylinder type bearing plate, a second bar penetrating hole is formed in the bracket leg, and the tension steel bar is penetrated in the first bar penetrating hole and the second bar penetrating hole and extends to the guide cap.
In a preferred mode of the invention, the rib plate of the guide cap is provided with a connecting groove, the end parts of the tension steel bars are arranged in the connecting groove in a penetrating way, the tension steel bars are distributed uniformly along the circumferential direction of the anchor rod body.
A construction method of a quick assembly type pull-press composite anchor rod comprises the following construction steps:
A. pressure-bearing anchoring section component assembly construction
Screwing the first cylindrical bearing plate onto the finish rolling deformed steel bar, and enabling the pressing plate to face the top end of the finish rolling deformed steel bar, and rotationally moving the first cylindrical bearing plate to a design position; taking the pressing plate as a starting point, sequentially and continuously winding the grease strips on the surface of the finish rolling deformed steel bar to the top end of the finish rolling deformed steel bar until reaching the position of the bearing plate under the second cylinder bearing plate;
B. tension anchor section component assembly construction
The first friction increasing plate and the second friction increasing plate are screwed into the tension anchoring section of the finish rolling screw steel in sequence from the bottom end of the finish rolling screw steel, the panel points to the top of the finish rolling screw steel, and the first friction increasing plate and the second friction increasing plate are screwed and moved to the design position according to the design interval;
C. Assembly of a guide cap
The second friction increasing plate and the first cylinder bearing plate are finely adjusted so that the first rib penetrating holes and the second rib penetrating holes correspond to the connecting grooves of the guide caps, the tension steel bars penetrate through the first rib penetrating holes of the first cylinder bearing plate and sequentially penetrate through the second rib penetrating holes of the second friction increasing plate until the tension steel bars are inserted into the connecting grooves;
D. Anchor head component assembly construction
The guide cap is aligned with the center of the anchor rod drilling hole and lowered to the designed depth, cement slurry is poured into the anchor rod drilling hole, the water-swelling rubber tube and the water stop tube are sleeved in sequence from the top end of the finish rolling threaded steel at the position corresponding to the anchor rod drilling hole opening on the ground, the bottom layer steel bar, the top layer steel bar, the bending steel bar and the vertical stirrup of the binding structure layer are sleeved in sequence from the top end of the finish rolling threaded steel, the spiral steel bar, the bearing plate and the second cylinder bearing plate are sleeved in sequence, so that the second cylinder bearing plate is pressed against the bearing plate, the second pressure plate is pressed against the bending steel bar, and the spiral steel bar is centered and fixed below the bearing plate;
E. pouring and pouring construction
And pouring concrete into the structural bottom plate to finish the whole construction process of the pull-press composite anchor rod.
After the technical scheme is adopted, the quick assembly type tension-compression composite anchor rod has the remarkable advantages that (1) the first cylinder type bearing plate is matched with the finish rolling threaded steel for use, the quick assembly can be realized by being quickly screwed to the design position on the finish rolling threaded steel, (2) the friction increasing plate and the finish rolling threaded steel are matched for use, the quick screw connection can be realized by being quickly screwed from the tension anchoring section design position of the finish rolling threaded steel, the effect of enhancing the binding force between the finish rolling threaded steel and cement paste is realized, (3) the local compression bearing capacity of concrete at the bottom of the second cylinder type bearing plate can be improved by the spiral reinforcing steel, (4) the grease strip can be quickly wound on the finish rolling threaded steel, the corrosion resistance of the finish rolling threaded steel of the pressure bearing anchoring section is greatly improved by combining with the corrosion protection sleeve, the whole assembly type construction is realized without any welding part, the standardized mass production can be realized by all parts, the quality of all parts of the system can be effectively ensured, meanwhile, the construction period is more convenient and the construction period is greatly saved, (6) the corrosion protection sleeve is sleeved on the outer side of the anchor rod body and the structure layer in sequence, and the corrosion protection sleeve is provided with the corrosion protection sleeve, and the corrosion protection performance is remarkably improved.
Drawings
Fig. 1 is a cross-sectional view of a construction completion according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view of a first barrel bearing plate of the present invention.
Fig. 3 is a top view of the first cylindrical bearing plate of the present invention.
Fig. 4 is a bottom view of the first cylindrical bearing plate of the present invention.
Fig. 5 is a cross-sectional view A-A of fig. 2 in accordance with the present invention.
Fig. 6 is a cross-sectional view of the B-B of fig. 2 in accordance with the present invention.
FIG. 7 is a cross-sectional view of the C-C of FIG. 2 in accordance with the present invention.
Fig. 8 is a cross-sectional view of a second barrel bearing plate of the present invention.
Fig. 9 is a plan view of a second barrel bearing plate of the present invention.
Fig. 10 is a bottom view of the second cylindrical bearing plate of the present invention.
FIG. 11 is a section view of the D-D of FIG. 8 according to the present invention.
Fig. 12 is an assembly construction view of a first barrel-type bearing plate joint of the present invention.
Fig. 13 is a cross-sectional view of fig. 12, E-E, in accordance with the present invention.
Fig. 14 is a cross-sectional view of the F-F of fig. 12 in accordance with the present invention.
Fig. 15 is a sectional view of the G-G of fig. 12 in accordance with the present invention.
Fig. 16 is a section H-H of fig. 12 according to the present invention.
Fig. 17 is a cross-sectional view of a first friction increasing plate of the present invention.
FIG. 18 is a cross-sectional L-L view of FIG. 17 in accordance with the present invention.
Fig. 19 is a cross-sectional view of the M-M of fig. 17 in accordance with the present invention.
FIG. 20 is a cross-sectional view of a second friction enhancing plate of the present invention.
Fig. 21 is an N-N cross-sectional view of fig. 20 in accordance with the present invention.
FIG. 22 is a diagram of a joint connection between a shank and a structural layer according to the present invention.
Fig. 23 is a cross-sectional view of the guide cap mated with the shank of the anchor in accordance with the present invention.
FIG. 24 is a cross-sectional view of the invention at O-O of FIG. 23.
FIG. 25 is a cross-sectional view at P-P of FIG. 23 in accordance with the present invention.
FIG. 26 is a cross-sectional view of the invention at Q-Q of FIG. 23.
FIG. 27 is a cross-sectional view taken at R-R of FIG. 23 in accordance with the present invention.
Fig. 28 is a cross-sectional view showing the construction completion of a structural layer concrete according to the second embodiment of the present invention.
Fig. 29 is a cross-sectional view showing the completion of the prestress tensioning according to the second embodiment of the present invention.
In the figure:
100 first barrel bearing plate 101 first press plate 102 first inner screw barrel
103 Reinforcing rib 104 first inner screw 105 first rib penetrating hole
110 Second cylindrical bearing plate 111 bearing plate 112 spiral reinforcing steel 113 second pressing plate
120 Seal cylinder 121U type cylinder 122 end external screw
123U type apron 124 second internal screw 125 perforation 126 sealing washer
127 Lower grouting pipe 128 upper exhaust pipe
130 Simple jack 131 oil cylinder 132 oil jack 133 pressure disc
134 Oil inlet pipe 135 oil stop valve
200 Finish rolling deformed steel bar 201 external screw thread 202 grease strip 203 anticorrosion sleeve
210 First friction increasing plate 211 panel 212 screw cylinder 213 third inner screw
220 Second friction increasing plate 221 support leg 222 second through hole 223 tension steel bar
230 Water stop pipe 231 wing plate 232 round pipe 233 water expansion rubber pipe
240 Cement paste
300 Guide cap 301 guide curved plate 302 curved surface reducing strip
303 Rib plate 304 connecting barrel 305 connecting groove 306 fourth inner screw
310 Anchor rod drilling
Steel bar 403 bending steel bar at top layer of steel bar 402 at bottom layer of 400 structural layer 401
404 Vertical stirrup 405 concrete 406 cushion layer
Detailed Description
In order to further explain the technical scheme of the present invention, the following is described in detail with reference to examples. Referring to fig. 1 to 27 (in the example, the bolt body is a finish-rolled screw steel 200, and only one finish-rolled screw steel 200 is used as a tendon for illustration), a first embodiment of the present invention provides a quick-assembly type pull-press composite bolt, which includes a finish-rolled screw steel 200, a first barrel bearing plate 100, a first friction increasing plate 210, a second friction increasing plate 220, a grease strip 202, a corrosion protection sleeve 203, and a guide cap 300. The guide cap 300 is arranged at the lower end of the finish rolling deformed steel bar 200, and a structural layer 400 is arranged at the upper end of the finish rolling deformed steel bar 200, wherein the structural layer 400 comprises a bottom layer steel bar 401, a top layer steel bar 402, a vertical stirrup 404 arranged between the bottom layer steel bar 401 and the top layer steel bar 402 and a bending steel bar 403 positioned on the top layer, a bearing plate 111 is arranged on the bending steel bar 403, and the bearing plate 111 is sleeved on the finish rolling deformed steel bar 200 and is locked and pressed on the bending steel bar 403 through a second cylinder bearing plate 110.
In the present invention, the surface of the finish rolling screw thread steel 200 is provided with external threads 201, the inner walls of the first cylinder bearing plate 100, the second cylinder bearing plate 110, the first friction increasing plate 210, the second friction increasing plate 220 and the guide cap 300 are respectively provided with internal threads matched with the external threads 201 of the finish rolling screw thread steel 200, and the first friction increasing plate 210 and the second friction increasing plate 220 are distributed at a distance of 2-4 m. Grease strip 202 is a felt belt for absorbing grease, grease strip 202 is continuously wound on the surface of finish rolling deformed steel bar 200 between first cylinder bearing plate 100 and bearing plate 111, anti-corrosion sleeve 203 is sleeved outside grease strip 202, and water-swelling rubber tube 233 and water-stop tube 230 are sleeved outside anti-corrosion sleeve 203 at the junction of the anchor rod body and structural layer 400 in sequence. Wherein water-swellable rubber tube 233 is made of a known water-swellable rubber material. In the present invention, a spiral reinforcing bar 112 is further provided under the bearing plate 111 under the second cylinder bearing plate 110.
Referring to fig. 2 to 29, a second embodiment of the present invention provides a prestressed pulling-pressing composite anti-floating anchor, which is different from the first embodiment in that the prestressed pulling-pressing composite anti-floating anchor further includes a sealing cylinder 120 disposed at the top of the anchor rod body, the sealing cylinder 120 is a cylindrical shape with an inner cavity formed by screwing a U-shaped cylinder 121 and a U-shaped cover plate 123, specifically, an outer end screw 122 is disposed on the outer wall of the U-shaped cylinder 121, a second inner screw 124 matched with the outer end screw 122 is disposed on the inner wall of the U-shaped cover plate 123, a simple jack 130 and a second cylinder bearing plate 110 are sleeved on the anchor rod body in the sealing cylinder 120, a pressure disc 133 is disposed on an oil top 132 of the simple jack 130, the pressure disc 133 is disposed corresponding to the second cylinder bearing plate 110, an oil inlet pipe 134 is connected to the simple jack 130, the oil inlet pipe 134 extends out of the sealing cylinder 120, and an oil stop valve 135 is disposed at a position where the oil inlet pipe 134 extends out of the sealing cylinder 120. The sealing cylinder 120 is provided with a lower grouting 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.
The first barrel bearing plate 100 is composed of a circular first pressing plate 101, a first inner screw barrel 102 and a reinforcing plate 103, the first pressing plate 101 is arranged at one axial end of the first inner screw barrel 102 and is perpendicular to the first inner screw barrel 102, first inner screws 104 matched with external threads 201 of the finish rolling screw steel 200 are arranged on the inner wall of the first inner screw barrel 102, and first rib penetrating holes 105 are formed in the first pressing plate 101 of the first barrel bearing plate 100 in a surrounding mode. The second cylinder bearing plate 110 is composed of an annular second pressing plate 113, a first inner screw cylinder 102 and a reinforcing plate 103. Preferably, the outer diameter of the first pressing plate 101 of the first cylinder type bearing plate 100 is 40-100mm smaller than the diameter of the anchor drilling 310. Preferably, the length of the first inner screw cylinder 102 of the first cylinder bearing plate 100 satisfies that the engagement bearing capacity of the first inner screw 104 with the external thread 201 of the finish rolling screw steel 200 is not lower than the tensile resistance of the finish rolling screw steel 200. Preferably, the second pressing plate 113 of the second cylindrical bearing plate 110 is not provided with the first reinforcement hole 105. Preferably, the diameter of the first tendon passing hole 105 is 7-16mm.
The first friction increasing plate 210 is composed of a circular panel 211 and a screw cylinder 212, the second friction increasing plate 220 is composed of a circular panel 211, a screw cylinder 212, support legs 221 and second rib penetrating holes 222, the panel 211 is arranged at one end of the screw cylinder 212 along the axial direction and is perpendicular to the screw cylinder 212, third inner screws 213 matched with the outer threads 201 of the finish rolling screw steel 200 are arranged on the inner wall of the screw cylinder 212, the support legs 221 are annularly arranged on the outer side of the panel 211, the support legs 221 are provided with the second rib penetrating holes 222, and the number of the second rib penetrating holes 222 is matched with the number and the distance of the first rib penetrating holes 105 of the first cylinder bearing plate 100. Preferably, the diameter of the panel 211 is 40-100mm larger than the diameter of the finish rolled screw steel 200. Preferably, the diameter of the second tendon passing hole 222 is 7-16mm. Preferably, the width of the bracket legs 221 is 15-25mm.
The water stop pipe 230 is composed of a circular pipe 232 and annular wing plates 231, wherein the wing plates 231 are arranged at two axial ends of the circular pipe 232 and are perpendicular to the circular pipe 232.
Referring to fig. 23-27 (only four curved reducing bars 302 are shown), the invention provides a self-reducing guide cap for an anchor rod, which comprises a guide curved plate 301, curved reducing bars 302, rib plates 303, a connecting cylinder 304 and a connecting groove 305. The outer wall of the guiding curved plate 301 is in a curved hemispherical shape, the curved reducing bar 302 is in a curved bar shape which is axially and annularly arranged around the guiding cap, the guiding curved plate 301 and the curved reducing bar 302 are connected into a whole, the contour line of the guiding curved plate is in a curve shape, and the outer diameter of the contour line is gradually increased along the top of the guiding curved plate 301 towards the direction of the curved reducing bar 302. The middle in the guiding curved plate 301 is provided with a connecting cylinder 304, the connecting cylinder 304 is arranged along the central line of the guiding curved plate 301, the inner wall of the connecting cylinder 304 is provided with a fourth inner screw 306, in particular a fourth inner screw 306, which is matched with the external screw thread 201 on the surface of the finish rolling deformed steel bar 200, the connecting cylinder 304 is connected with the guiding curved plate 301 by adopting the rib plates 303, and in the embodiment, 4 rib plates 303 are displayed.
Preferably, the maximum outer diameter of the guiding curved plate 301 is 0.5-0.6 times of the diameter of the anchor rod drilling hole 4, and the maximum outer diameter of the circumferential edge where the curved variable diameter strip 302 is located is 1.0-1.4 times of the diameter of the anchor rod drilling hole 10.
Preferably, the width of the curved reducing bar 302 is 30-100mm.
Preferably, the rib 303 is disposed between the connecting cylinder 304 and the guide curved plate 301.
Preferably, the inner diameter of the connecting cylinder 304 corresponds to the outer 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 thereto.
Preferably, the rib 303 is provided with a connecting groove 305, and the inner diameter of the connecting groove 305 is 7-16mm.
Preferably, the connecting grooves 305 are matched with the number and the spacing of the first tendon passing holes 105.
Preferably, the height of the connecting cylinder 304 is 50-200mm higher than the height of the rib 303.
Preferably, tension bars 223 are fixedly installed in the connecting grooves 305, the second bar penetrating holes 222 of the second friction increasing plate 220, and the first bar penetrating holes 105 of the first cylinder bearing plate 100. The self-reducing guide cap for the tension-compression composite anchor rod is characterized in that an anchor rod body (finish rolling threaded steel 200) can be directly screwed in a connecting cylinder 304, a guide curved plate 301 can ensure that the finish rolling threaded steel 200 has reliable protective layer thickness in the process of placing an anchor rod drilling hole 310 under the anchor rod body, when the diameter of the anchor rod drilling hole 310 changes within a certain range due to construction, the curved surface reducing strip 302 has good flexibility, the outer diameter of the curved surface reducing strip 302 is larger than the maximum outer diameter of the guide curved plate 301, the curved surface reducing strip 302 can be compressed or stretched in the radial direction of the diameter of the anchor rod drilling hole 310, the diameter change of the anchor rod drilling hole 310 can be well adapted, and the finish rolling threaded steel 200 is always ensured to be positioned in the middle position 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 tension bar 223 is inserted into the connecting groove 305 of the guide cap 300 after sequentially passing through the first reinforcement penetrating hole 105 of the first barrel-type bearing plate 100 and the second reinforcement penetrating hole 222 of the second friction increasing plate 220, and the outer surface of the finish-rolled deformed steel bar 200 between the first barrel-type bearing plate 100 and the bearing plate 111 under the second barrel-type bearing plate 110 is sequentially wound with the grease strip 202 and sleeved with the anti-corrosive sleeve 203. Because the design reference period of the anti-floating anchor rod is not lower than the design reference period of a building, and is generally not lower than 50 years, in order to prevent the tensile anchoring section grouting body from being cracked due to tension, and then the anchor rod body is corroded, and the like, and even endanger the safety of anchoring engineering, the anti-floating anchor rod further comprises a tensile steel bar 223 arranged in the tensile anchoring section grouting body, the first drum-type bearing plate 100 is directly provided with a first steel bar penetrating hole 105, the second friction increasing plate 220 is provided with a second steel bar penetrating hole 222, and the tensile steel bar 223 is penetrated in the first steel bar penetrating hole 105 and the second steel bar 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 to the first pressing plate 101 of the first cylinder type bearing plate 100 by 2-4 times the diameter of the anchor rod drilling hole 310.
Corresponding to the first embodiment, the invention provides a construction method of a quick assembly type pull-press composite anti-floating anchor rod, which comprises the following construction steps:
A. pressure-bearing anchoring section component assembly construction
The first cylinder bearing plate 100 is screwed into the finish rolling screw steel 200, the first pressing plate 101 faces the top end of the finish rolling screw steel 200, and the first cylinder bearing plate 100 is rotated and moved to a designed position, the grease strip 202 is wound onto the top end of the finish rolling screw steel 200 continuously on the surface of the finish rolling screw steel 200 in sequence by taking the position of the first pressing plate 101 as a starting point, and the grease strip 202 is wound onto the position of the bearing plate 111 below the second cylinder bearing plate 110, and the anti-corrosion sleeve 203 is sleeved in the whole length range of the winding of the grease strip 202;
B. tension anchor section component assembly construction
Sequentially screwing the first friction increasing plate 210 and the second friction increasing plate 220 into the tension anchoring section of the finish rolling screw steel 200 from the bottom end of the finish rolling screw steel 200, leading the panel 211 to point to the top of the finish rolling screw steel 200, screwing the first friction increasing plate 210 and the second friction increasing plate 220, and moving to the design position according to the design interval;
C. Assembly of a guide cap
Finely adjusting the second friction increasing plate 220 and the first cylinder bearing plate 100 so that the first rib penetrating holes 105 and the second rib penetrating holes 222 correspond to the connecting grooves 305 of the guide cap 300, penetrating the tension steel bar 223 from the first rib penetrating holes 105 of the first cylinder bearing plate 100, penetrating the second rib penetrating holes 222 of the second friction increasing plate 220 in sequence, and stopping the insertion into the connecting grooves 305;
D. Anchor head component assembly construction
The guide cap 300 is aligned with the center of the anchor rod drilling hole 310 and lowered to a designed depth, cement paste 240 is poured into the anchor rod drilling hole 310, the water-swelling rubber tube 233 and the water-stopping tube 230 are sleeved in sequence from the top end of the finish rolling screw steel 200 at the position corresponding to the hole opening of the anchor rod drilling hole 310 on the ground, the bottom layer steel bar 401, the top layer steel bar 402, the bending steel bar 403 and the vertical stirrup 95 of the structural layer 400 are bound, the spiral steel bar 112, the pressure bearing plate 111 and the second barrel type pressure bearing plate 110 are sleeved in sequence from the top end of the finish rolling screw steel 200, the second barrel type pressure bearing plate 110 is pressed against the pressure bearing plate 111, the pressure bearing plate 111 is propped against the bending steel bar 403, and the spiral steel bar 112 is centered and fixed below the pressure bearing plate 111;
E. pouring and pouring construction
And pouring concrete 405 into the structural layer 400 to complete the whole construction process of the pulling and pressing composite anti-floating anchor.
The quick assembled tension-compression composite anchor rod and the construction method thereof have the advantages that all parts are assembled, no welding parts are needed, standardized mass production of all parts can be realized, the quality of all parts of a system can be effectively guaranteed, the assembly and the assembly construction are more convenient, the construction period can be greatly saved, grease strips and anti-corrosion sleeves are adopted to form double protection on finish rolling screw thread steel on a pressure bearing anchoring section, tension steel bars are arranged on a tension anchoring section in a surrounding mode of the finish rolling screw thread steel, the tensile bearing capacity of cement paste of the tension anchoring section is improved, corrosion of the finish rolling screw thread steel caused by cement paste cracking is avoided, the anti-corrosion performance of the finish rolling screw thread steel is remarkably improved, and the quick assembled tension-compression composite anchor rod can be well suitable for permanent anchoring projects such as anti-floating anchor rods and side slope support anchor rods.
Corresponding to a second embodiment, the invention provides a construction method of a prestress tension-compression composite anti-floating anchor rod, which comprises the following construction steps:
A. pressure-bearing anchoring section component assembly construction
Screwing the first cylindrical bearing plate 100 onto the finish rolling deformed steel bar 200, and rotating the first bearing plate 101 toward the top end of the finish rolling deformed steel bar 200 to move the first cylindrical bearing plate 100 to a design position; taking the position of the first pressing plate 101 as a starting point, sequentially and continuously winding the grease strips 202 towards the top direction of the anchor rod body on the surface of the anchor rod body, winding the grease strips 202 to the design position of the second cylinder type bearing plate 110, and sleeving the anti-corrosion sleeve 203 outside the anchor rod body corresponding to the grease strips 202;
B. tension anchor section component assembly construction
Sequentially screwing the first friction increasing plate 210 and the second friction increasing plate 220 into a tension anchoring section of the finish rolling screw steel 200 from the bottom end of the finish rolling screw steel 200, enabling the panel 211 to point to the top of the finish rolling screw steel 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 a guide cap
Finely adjusting the second friction increasing plate 220 and the first cylinder bearing plate 100 so that the first rib penetrating holes 105 and the second rib penetrating holes 222 correspond to the connecting grooves 305 of the guide cap 300, penetrating the tension steel bar 223 from the first rib penetrating holes 105 of the first cylinder bearing plate 100, penetrating the second rib penetrating holes 222 of the second friction increasing plate 220 in sequence, and stopping the insertion into the connecting grooves 305;
D. sealing cylinder assembly construction
Sleeving a sealing ring 126 and a U-shaped barrel 121 on the top of finish-rolled screw steel 200 to a designed position, sequentially loading a simple jack 130 and a second barrel-type bearing plate 110 on the bottom of the U-shaped barrel 121, lowering an oil top 132 of the simple jack 130 to the lowest position, pressing the oil top 132 by the second barrel-type bearing plate 110, sequentially connecting an oil inlet pipe 134 and a lower grouting pipe 127 of the simple jack 130 to the top surface of an exposed structure layer 400 through a connecting port arranged on the U-shaped barrel 121, screwing a U-shaped cover plate 123 into the top of the U-shaped barrel 121, and connecting an upper exhaust pipe 128 to the top surface of the exposed structure;
E. Construction of structural layer
Binding the reinforcing steel bars in the structural layer 400, fixing the sealing cylinder 120 with the reinforcing steel bars, and then pouring concrete 405 into the structural layer;
F. prestress tensioning
After the concrete 405 of the structural layer 400 is cured to the design requirement, hydraulic oil is pumped into the simple jack 130 through the oil inlet pipe 134 by adopting an oil pump, when the oil pressure reaches the pressure value calibrated by the design prestress, the oil stop valve 135 is closed, meanwhile, cement slurry 240 (cement slurry with the cement ratio of 0.45-0.6 can be adopted) is injected into the sealing cylinder 123 through the lower grouting pipe 127 until the upper exhaust pipe 128 continuously overflows the cement slurry 240, and when the cement slurry 240 is cured to the design requirement, the exposed lower grouting pipe 127, the upper exhaust pipe 128 and the oil inlet pipe 134 are removed.
The product form of the present invention is not limited to the embodiments described herein, and any suitable variations or modifications of the similar concept should be regarded as not departing from the scope of the invention.
Claims (7)
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| CN106436748A (en) * | 2016-07-04 | 2017-02-22 | 中国电建集团华东勘测设计研究院有限公司 | Rock anchor foundation structure applicable to mountain photovoltaic assembly and construction method thereof |
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