CN111945720A - Self-reducing guide cap and tension-compression composite anchor rod adopting same - Google Patents
Self-reducing guide cap and tension-compression composite anchor rod adopting same Download PDFInfo
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- CN111945720A CN111945720A CN202010896654.2A CN202010896654A CN111945720A CN 111945720 A CN111945720 A CN 111945720A CN 202010896654 A CN202010896654 A CN 202010896654A CN 111945720 A CN111945720 A CN 111945720A
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- 238000007906 compression Methods 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 238000004873 anchoring Methods 0.000 claims description 17
- 239000004519 grease Substances 0.000 claims description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 34
- 238000005553 drilling Methods 0.000 abstract description 23
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000004904 shortening Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 16
- 210000002435 tendon Anatomy 0.000 description 16
- 239000004568 cement Substances 0.000 description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 10
- 235000017491 Bambusa tulda Nutrition 0.000 description 10
- 241001330002 Bambuseae Species 0.000 description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 10
- 239000011425 bamboo Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000007667 floating Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003433 contraceptive agent Substances 0.000 description 1
- 230000002254 contraceptive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects 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
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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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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a self-reducing guide cap for an anchor rod, which comprises a guide curved plate, a curved surface reducing strip, a rib plate and a connecting cylinder. The guide curved plate is in a curved hemispherical shape, the curved reducing strips are in a curved strip shape, the guide curved plate and the curved reducing strips are connected into a whole, the contour line of the guide curved plate is in a curved shape, a connecting cylinder is arranged in the middle of the guide cap, a fourth inner screw matched with a finish-rolled deformed steel bar surface rib is arranged on the inner wall of the connecting cylinder, and the connecting cylinder is connected with the guide curved plate through the rib plates. The device has the characteristics of simplicity, reliability, quick construction, adaptability to the condition of uneven diameter of the anchor rod drilling hole and guarantee of good centering capability of the anchor rod body. The invention also provides a permanent tension-compression composite anchor rod adopting the guide cap, which has the advantages of quick construction and capability of shortening the construction period, and the anchor rod body has the remarkable advantage of good corrosion resistance.
Description
Technical Field
The invention relates to a self-reducing guide cap and a tension-compression composite anchor rod adopting the same, and belongs to the technical field of building construction.
Background
The anchor rod can provide the uplift resistance by depending on the bonding effect between the anchor rod and the anchoring ground, and the anchor rod is widely applied to engineering construction such as foundation pits, side slopes, water conservancy and building uplift resistance because of the obvious advantages of convenient construction, high uplift resistance and the like.
After the anchor rod is stressed, the force transmission path of the structure is as follows in sequence: the outer end passes power roof beam and transmits power for the anchor head, and the anchor head transmits power for the reinforcing bar of anchor section through the stock free segment, and the rethread reinforcing bar is with the adhesive effect of grout and ground layer with the transmission for stable ground layer of power. In the process of force transmission, the transmission of the bonding force of the reinforcing steel bar and cement paste is an important link, and the centering, the inclination, the deviation and other construction factors of the reinforcing steel bar directly influence the uplift bearing capacity of the anchor rod, so that the centering and the guiding construction of the reinforcing steel bar are extremely important in the anchor rod construction process.
The anchor rod (for example, for the reinforcing bar) centering and the direction construction of current anchor rod are extremely important in the work progress, in order to lead to the anchor rod, can set up the direction cap at the tip of anchor rod, the external diameter of current direction cap is fixed dimension mostly, generally is less than anchor rod drilling diameter, because anchor rod drilling in-process, anchor rod drilling diameter receives the drilling rod shake, the local collapse of pore wall, the drilling is deviated the axial, local drilling diameter reason such as small partially, lead to the anchor rod drilling not uniform diameter, phenomenons such as local reaming or cable hole, inclined hole ubiquitous. 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. (3) At the reaming position, the guide cap leads the anchor rod body to deviate from the axis seriously due to sinking, and even clings to the hole wall, thus leading the uplift bearing capacity to be reduced seriously and causing great potential safety hazard.
Therefore, the problem of engineering can be effectively solved by researching and developing the guide cap which can actively change the diameter within a certain anchor rod drilling diameter variation range. Accordingly, the present inventors have made extensive studies on the above problems
The scheme is generated.
Disclosure of Invention
The invention aims to provide a self-reducing guide cap which is simple and reliable in structure and can adapt to the diameter change of an anchor rod drill hole, has the capability of adapting to the diameter change of the anchor rod drill hole, can actively change the diameter of the guide cap according to the diameter of the anchor rod drill hole and effectively ensures the centering of an anchor rod reinforcing steel bar; the invention also aims to provide a tension-compression composite anchor rod adopting the guide cap, which has the advantages of quick construction, capability of shortening the construction period and suitability for permanent anchoring engineering.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an active self-reducing guide cap for stock, includes direction curved plate, curved surface reducing strip, floor and connecting cylinder, the direction curved plate is curved surface hemisphere shape, curved surface reducing strip is for encircling the curved surface strip form of establishing around the guide cap axial, the direction curved plate with curved surface reducing strip links into an integrated entity, and its outline line is the curvilinear figure, the external diameter of outline line is followed direction curved plate top to curved surface reducing strip direction crescent is provided with the connecting cylinder in the middle of the guide cap, and the connecting cylinder inner wall is provided with the fourth internal screw that cooperatees and use with finish rolling screw-thread steel surface external screw thread, the connecting cylinder with direction curved plate adopts the floor is connected.
In a preferred embodiment of the present invention, the maximum diameter of the guide curved plate is 0.5 to 0.6 times of the diameter of the anchor hole, and the maximum diameter of the curved tapered strip is 1.0 to 1.4 times of the diameter of the anchor hole.
In a preferred embodiment of the present invention, the width of the curved surface variable diameter bars is 30 to 100 mm.
In a preferred aspect of the present invention, the rib ring is provided between the connecting cylinder and the guide curved plate.
In a preferred embodiment of the present invention, the rib plate is provided with a connecting groove, and the inner diameter of the connecting groove is 7 to 16 mm. .
In a preferred embodiment of the present invention, the height of the connecting tube is 50 to 200mm higher than the height of the rib.
After the technical scheme is adopted, the finish-rolled deformed steel bar of the anchor rod can be directly screwed into the connecting cylinder of the guide cap, and the guide curved plate can ensure that the finish-rolled deformed steel bar has reliable protective layer thickness in the process of placing the anchor rod below the rod body of the anchor rod and drilling; when the diameter of the anchor rod drilled hole changes within a certain range due to construction, the curved surface reducing strip has good flexibility, and the outer diameter of the curved surface reducing strip is larger than the maximum outer diameter of the guide curved plate, so that the curved surface reducing strip can be compressed in the radial direction of the diameter of the anchor rod drilled hole, can well adapt to the change of the diameter of the anchor rod drilled hole, and always ensures that finish-rolled deformed steel bars are positioned in the middle of the anchor rod drilled hole; the connecting groove can be inserted with reinforcing bars, so that the tensile strength of the cement paste is enhanced, and the durability is improved. The invention has the characteristics of simple and reliable device, quick construction and strong adaptability.
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 (9)
1. From reducing direction cap, its characterized in that: the anchor rod guiding device comprises a guiding curved plate, curved surface reducing strips, rib plates and connecting cylinders, wherein the outer wall of the guiding curved plate is in a curved surface hemispherical shape, the curved surface reducing strips are in a curved surface strip shape, the guiding curved plate and the curved surface reducing strips are connected into a whole and form a curved surface outline, the connecting cylinders are arranged in the guiding curved plate, fourth inner threads matched with an anchor rod body are arranged on the inner wall of each connecting cylinder, and the connecting cylinders are connected with the guiding curved plate through the rib plates.
2. The self-reducing guide cap of claim 1, wherein: the curved surface reducing strips are multiple and are uniformly distributed along the circumferential direction of the guide curved plate.
3. The self-reducing guide cap of claim 1, wherein: the number of the ribbed plates is multiple, and the ribbed plates are uniformly distributed along the circumferential direction of the inner wall of the guide curved plate.
4. The self-reducing guide cap of claim 1, wherein: the outer diameter of the spherical outer contour is gradually increased from the guide curved plate to the curved surface reducing strip, the maximum outer diameter of the guide curved plate is 0.5-0.6 times of the diameter of the anchor rod drill hole, and the maximum diameter of the circumference where the outer wall of the curved surface reducing strip is located is 1.0-1.4 times of the diameter of the anchor rod drill hole.
5. The self-reducing guide cap of claim 1, wherein: the finish-rolled deformed steel bar can be directly screwed into the connecting cylinder.
6. The utility model provides a compound stock of permanent tension-compression, includes the stock body of rod, and the cover is established and is equipped with first cylinder bearing plate and direction cap on the body, and the stock body of rod forms pressure-bearing anchoring section and tensile anchoring section, its characterized in that from top to bottom in the both sides of first cylinder bearing plate: 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 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, the connecting cylinder is arranged in the guide curved plate, the inner wall of the connecting cylinder is provided with a fourth screw matched with the anchor rod body for use, and the connecting cylinder and the guide curved plate are connected through the rib plate.
7. A permanent tension-compression composite anchor rod as claimed in claim 6, wherein: still be equipped with first cylinder bearing plate, grease strip, anticorrosive sleeve pipe, bearing plate and second cylinder bearing plate on the stock body of rod of pressure-bearing anchor section scope, be equipped with the external screw thread on the stock body of rod, first cylinder bearing plate with second cylinder bearing plate all be provided with the stock body of rod the internal 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 winding in succession of grease strip is in 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.
8. A permanent tension-compression composite anchor rod as claimed in claim 7, wherein: the first friction increasing plate and the second friction increasing plate are further arranged between the guide cap and the first cylinder type bearing plate, the first cylinder type bearing plate is provided with a first rib penetrating hole, a support leg is arranged on the side face of the second friction increasing plate, a second rib penetrating hole is formed in the support leg, and the tension reinforcing steel bar penetrates through the first rib penetrating hole and the second rib penetrating hole and extends to the guide cap.
9. A permanent tension-compression composite anchor rod as claimed in claim 8, wherein: the ribbed slab is provided with connecting grooves in which the tension bars are inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896654.2A CN111945720A (en) | 2020-08-31 | 2020-08-31 | Self-reducing guide cap and tension-compression composite anchor rod adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010896654.2A CN111945720A (en) | 2020-08-31 | 2020-08-31 | Self-reducing guide cap and tension-compression composite anchor rod adopting same |
Publications (1)
| Publication Number | Publication Date |
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| CN111945720A true CN111945720A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010896654.2A Pending CN111945720A (en) | 2020-08-31 | 2020-08-31 | Self-reducing guide cap and tension-compression composite anchor rod adopting same |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853552A (en) * | 2019-03-29 | 2019-06-07 | 华侨大学 | Assembled entirety bearing plate and the tension and compression composite anchor-rod for using the bearing plate |
| CN209958353U (en) * | 2019-03-29 | 2020-01-17 | 华侨大学 | A assembled direction cap for stock |
| 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 |
| CN213233441U (en) * | 2020-08-31 | 2021-05-18 | 华侨大学 | Self-reducing guide cap and tension-compression composite anchor rod adopting same |
-
2020
- 2020-08-31 CN CN202010896654.2A patent/CN111945720A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109853552A (en) * | 2019-03-29 | 2019-06-07 | 华侨大学 | Assembled entirety bearing plate and the tension and compression composite anchor-rod for using the bearing plate |
| CN209958353U (en) * | 2019-03-29 | 2020-01-17 | 华侨大学 | A assembled direction cap for stock |
| CN213233441U (en) * | 2020-08-31 | 2021-05-18 | 华侨大学 | Self-reducing guide cap and tension-compression composite anchor rod adopting same |
Non-Patent Citations (1)
| Title |
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| 涂兵雄: ""新型拉压复合型锚杆锚固性能研究:Ⅰ简化理论"", 岩土工程学报, 31 December 2018 (2018-12-31) * |
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