CN107059664B - Rotary self-locking tensioning anchoring device for prestressed fiber cloth - Google Patents
Rotary self-locking tensioning anchoring device for prestressed fiber cloth Download PDFInfo
- Publication number
- CN107059664B CN107059664B CN201710465990.XA CN201710465990A CN107059664B CN 107059664 B CN107059664 B CN 107059664B CN 201710465990 A CN201710465990 A CN 201710465990A CN 107059664 B CN107059664 B CN 107059664B
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- Prior art keywords
- anchor
- fiber cloth
- anchor rod
- clamping piece
- column
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- 239000000835 fiber Substances 0.000 title claims abstract description 63
- 239000004744 fabric Substances 0.000 title claims abstract description 60
- 238000004873 anchoring Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000011150 reinforced concrete Substances 0.000 claims description 26
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 10
- 239000004567 concrete Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a rotary self-locking tensioning anchoring device for prestressed fiber cloth, which comprises two anchor rods, two clamping pieces, two anchor heads, four unidirectional bearings for maintaining prestress, eight wedges and fiber cloth. The two anchor rods and the clamping piece which are wound with the fiber cloth are driven to rotate by pulling the force spanner on the anchor rods, so that the fiber cloth is stretched. The device of the invention avoids the treatment of a corner chamfer and the friction loss of a corner of the fiber cloth in the application process for reinforcing the square column. The bending phenomenon of the screw rod when the tension force is large in the process of applying force by the clip type anchorage is avoided. The device has the advantages of small required operation space, simple structure, convenient operation and low cost.
Description
Technical Field
The invention belongs to the field of structural reinforcement of bridge engineering, constructional engineering and the like, and particularly relates to a prestressed fiber cloth rotary self-locking tensioning anchoring device for reinforcing reinforced concrete pier columns.
Background
The fiber composite reinforced material has the characteristics of high unidirectional tensile strength, light weight, high elastic modulus, small volume, corrosion resistance and the like, and the section and load increase of the original structural member are not large after the reinforcement, so that the fiber composite reinforced material is widely applied to reinforcement of a concrete structure. In practical application, prestress is applied to the circumferential fiber material, and the prestress fiber material constrains the reinforced concrete column to enable the core concrete to be effectively laterally constrained on the premise of improving the utilization rate of the material. Because the application of the prestress of the fiber material is limited by the anchorage devices, the mature anchorage devices in the market at present are few, and the clamping effect is not ideal.
Disclosure of Invention
The invention aims to solve the problems of stretching and anchoring of prestressed fiber cloth in the stretching process, and further provides a rotary self-locking stretching and anchoring device for the prestressed fiber cloth.
In order to achieve the above object, the technical scheme of the present invention is as follows: the rotary self-locking tensioning anchoring device for the prestressed fiber cloth comprises two anchor rods, two clamping pieces, two anchor heads, four unidirectional bearings for maintaining prestress, eight wedge blocks and the fiber cloth; the anchor rod consists of anchor rod ends at two ends, a hexagon nut and an anchor body, wherein the anchor rod ends at two ends are respectively provided with an anchor rod U-shaped groove, and the two ends of the anchor body are provided with clamping piece mounting holes; the two ends of the clamping piece are correspondingly provided with clamping piece mounting holes, and screws penetrate through the corresponding clamping piece mounting holes to fixedly connect the clamping piece and the anchor rod; the anchor head is provided with two mounting holes, each mounting hole consists of a small hole and a large hole, the diameters and the depths of the small holes and the large holes are consistent with those of the anchor rod end head connected with the anchor head and the unidirectional bearing, and an anchor head U-shaped groove is formed in the large hole.
The end part of the fiber cloth is clamped between the anchor rod and the clamping piece and is wound for 1-2 circles. The four unidirectional bearings are respectively placed in the big holes of the two anchor heads, the directions of the unidirectional bearings are simultaneously noted, and the U-shaped grooves of the unidirectional bearings on the unidirectional bearings are aligned with the U-shaped grooves of the anchor heads on the anchor heads and placed into wedge blocks; wrapping fiber cloths with two ends wound between the anchor rods and the clamping pieces on the positions to be reinforced of the reinforced concrete pier column, penetrating the anchor rod ends at the two ends of the anchor rods into small holes of anchor heads, aligning the U-shaped grooves of the anchor rod ends with the unidirectional bearing notches of the unidirectional bearings, and placing wedge blocks; and (3) placing the stressing spanner at the hexagon nut of the anchor rod, and pulling the stressing spanner to drive the two anchor rods and the clamping pieces which are wound with the fiber cloth to rotate, so that the tensile stress in the fiber cloth is gradually increased until the fiber cloth is loaded to the required control stress.
The anchor head selects an L-shaped flat plate clung to the surface of the square column or an arc plate clung to the surface of the column according to the square column or the column of the reinforced concrete pier column to be reinforced.
Compared with the prior art, the invention has the advantages that: (1) For reinforcing rectangular columns, the placement of the device at a corner of the column avoids the frictional loss of the fiber cloth at a corner during application while reducing the handling of one corner during reinforcement. (2) The bending phenomenon of the screw rod when the tension force is large in the process of applying force by the clip type anchorage is avoided. (3) The device has the advantages of small required operation space, simple structure, convenient operation and low cost.
Drawings
Fig. 1 is a schematic installation diagram of a prestressed fiber cloth rotary self-locking tensioning and anchoring device in the case that the reinforced concrete pier column to be reinforced is a square column in embodiment 1 of the present invention.
Fig. 2 is a plan view showing the installation of the prestressed fiber cloth rotary self-locking type tensioning and anchoring device in the case that the reinforced concrete pier column to be reinforced is a square column in embodiment 1 of the present invention.
Fig. 3 is a schematic installation diagram of the prestressed fiber cloth rotary self-locking tensioning and anchoring device in the case that the reinforced concrete pier column to be reinforced is a cylinder in embodiment 2 of the present invention.
Fig. 4 is a plan view showing the installation of the prestressed fiber cloth rotary self-locking type tensioning and anchoring device in the case that the reinforced concrete pier column to be reinforced is a cylinder in embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of an anchor head, a one-way bearing, and a wedge in an embodiment of the present invention.
FIG. 6 is a schematic view of the structure of the anchors and clips according to the embodiment of the present invention.
The marks in the figure: 1-anchor rod; 11-anchor rod ends; 12-hex nuts; 13-anchor body; 131-clip mounting holes; 111-anchor bar U-shaped groove; 2-clamping pieces; 21-a screw; 3-anchor heads; 31-small holes; 32-macropores; 321-anchor head U-shaped grooves; 4-a one-way bearing; 41-a one-way bearing gap; 42-a one-way bearing U-shaped groove; 5-wedge block; 6-fiber cloth; 7-reinforced concrete square columns; 8-reinforced concrete cylinder.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
example 1:
as shown in fig. 1, 2, 5 and 6, in this embodiment, the reinforced concrete square column 7 is used as a reinforcing object, and is reinforced by a prestressed fiber cloth rotary self-locking tensioning anchoring device, and the width of the fiber cloth 6 is 150mm. The method comprises the following steps:
the rotary self-locking tensioning anchoring device for the prestressed fiber cloth comprises two anchor rods 1, two clamping pieces 2, two anchor heads 3, four unidirectional bearings 4 for maintaining prestress, eight wedges 5 and fiber cloth 6.
The anchor rod 1 consists of anchor rod end heads 11 at two ends, a hexagon nut 12 and an anchor body 13, wherein the anchor rod end heads 11 at two ends are respectively provided with an anchor rod U-shaped groove 111, and two ends of the anchor body 13 are provided with clamping piece mounting holes 131; the two ends of the clamping piece 2 are correspondingly provided with clamping piece mounting holes 131, and screws 21 penetrate through the corresponding clamping piece mounting holes 131 to fixedly connect the clamping piece 2 with the anchor rod 1.
Two mounting holes are formed in the middle of the anchor head 3, and each mounting hole consists of a small hole 31 and a large hole 32. The diameters and depths of the small holes 31 and the large holes 32 are consistent with the diameters and depths of the anchor rod end 11 and the one-way bearing 4 connected with the anchor head 3. An anchor head U-shaped notch 321 is formed in the large hole 32.
The anchor head 3 is an L-shaped flat plate which is tightly attached to the surface of the reinforced concrete square column 7.
The concrete reinforcement steps are as follows:
(1) Determining the reinforcement position on the reinforced concrete square column 7; and (3) popping out a position range which is required to be wrapped by the prestressed carbon fiber cloth on the surface of the ink line by using the ink line. Three corners of the reinforced concrete square column 7 are polished and chamfered by a polisher.
(2) And polishing, hole repairing and the like are carried out on the surface of the reinforced concrete square column 7. Uniformly brushing an epoxy adhesive layer on the surface of the range where the reinforced concrete square column 7 needs to be wrapped by the prestressed fiber cloth.
(3) The blanking length of the fiber cloth 6 is determined and cut. The blanking length of the fibre cloth 6 = 1 times the perimeter of the Zhou Changjia anchor rod of the column at the wrapping location.
(4) One end of the fiber cloth 6 is clamped between the anchor rod 1 and the clamping piece 2, and the screw 21 is screwed in the clamping piece mounting hole 131 to fix the anchor rod 1 and the clamping piece 2. The fiber cloth 6 is wound for 1 circle along the anchor rod 1 and the clamping piece 2 in a circumferential direction, and the fiber cloth 6 is tightly wrapped between the anchor rod 1 and the clamping piece 2 in the winding process. And repeating the steps of clamping and circumferential winding of the anchor rod 1 and the clamping piece 2 on the other end of the fiber cloth 6 to finish the connection of the fiber cloth 6 and an anchorage device.
(5) The four unidirectional bearings 4 are placed in the reserved large holes 32 of the two anchor heads 3 respectively, the direction of the unidirectional bearings 4 is noted, and the unidirectional bearing U-shaped grooves 42 on the unidirectional bearings 4 are aligned with the anchor head U-shaped grooves 321 on the anchor heads and placed into the wedge blocks 5.
(6) The fiber cloth 6 with two ends wound between the anchor rod 1 and the clamping piece 2 is wrapped at the position where reinforcement is needed by the reinforced concrete square column 7, the anchor rod ends 11 at the two ends of the anchor rod 1 are respectively penetrated into the small holes 31 of the anchor head 3, and the anchor rod U-shaped groove 111 on the anchor rod ends 11 is aligned with the unidirectional bearing notch 41 on the unidirectional bearing 4 and is placed into the wedge block 5.
(7) And (3) placing a force spanner at the hexagon nut 12 of the anchor rod 1, and pulling the force spanner to drive the two anchor rods 1 and the clamping pieces 2 wound with the fiber cloth 6 to rotate, so that the tensile stress in the fiber cloth 6 is gradually increased until the required control stress is loaded, namely, the reinforcement of the reinforced concrete square column 7 is completed.
Example 2:
as shown in fig. 3 to 6, in this embodiment, the reinforced concrete cylinder 8 is used as a reinforcing object, and is reinforced by using a prestressed fiber cloth rotary self-locking tensioning anchoring device, and the width of the fiber cloth 6 is 150mm. The method comprises the following steps:
the rotary self-locking tensioning anchoring device for the prestressed fiber cloth comprises two anchor rods 1, two clamping pieces 2, two anchor heads 3, four unidirectional bearings 4 for maintaining prestress, eight wedges 5 and fiber cloth 6.
The anchor rod 1 consists of anchor rod end heads 11 at two ends, a hexagon nut 12 and an anchor body 13, wherein the anchor rod end heads 11 at two ends are respectively provided with an anchor rod U-shaped groove 111, and two ends of the anchor body 13 are provided with clamping piece mounting holes 131; the two ends of the clamping piece 2 are correspondingly provided with clamping piece mounting holes 131, and screws 21 penetrate through the corresponding clamping piece mounting holes 131 to fixedly connect the clamping piece 2 with the anchor rod 1.
Two mounting holes are formed in the middle of the anchor head 3, and each mounting hole consists of a small hole 31 and a large hole 32. The diameters and depths of the small holes 31 and the large holes 32 are consistent with the diameters and depths of the anchor rod end 11 and the one-way bearing 4 connected with the anchor head 3. An anchor head U-shaped notch 321 is formed in the large hole 32.
The anchor head 3 is an arc plate which is tightly attached to the surface of the reinforced concrete cylinder 8.
The concrete reinforcement steps are as follows:
(1) And polishing, hole repairing and the like are carried out on the surface of the reinforced concrete cylinder 8. And uniformly brushing an epoxy adhesive layer on the surface of the reinforced concrete cylinder 8 in the range where the prestressed fiber cloth is required to be wrapped.
(2) The blanking length of the fiber cloth 6 is determined and cut. The blanking length of the fibre cloth 6 = 2 times the perimeter of the Zhou Changjia anchor rod of the column at the wrapping location.
(3) One end of the fiber cloth 6 is clamped between the anchor rod 1 and the clamping piece 2, and the screw 21 is screwed in the clamping piece mounting hole 131 to fix the anchor rod 1 and the clamping piece 2. The fiber cloth 6 is wound for 2 circles along the anchor rod 1 and the clamping piece 2 in a circumferential direction, and the fiber cloth 6 is tightly wrapped between the anchor rod 1 and the clamping piece 2 in the winding process. And repeating the steps of clamping and circumferential winding of the anchor rod 1 and the clamping piece 2 on the other end of the fiber cloth 6 to finish the connection of the fiber cloth 6 and an anchorage device.
(4) The four unidirectional bearings 4 are placed in the reserved large holes 32 of the two anchor heads 3 respectively, the direction of the unidirectional bearings 4 is noted, and the unidirectional bearing U-shaped grooves 42 on the unidirectional bearings 4 are aligned with the anchor head U-shaped grooves 321 on the anchor heads and placed into the wedge blocks 5.
(5) The fiber cloth 6 with two ends wound between the anchor rod 1 and the clamping piece 2 is wrapped at the position where the reinforced concrete column 8 needs to be reinforced, the anchor rod ends 11 at the two ends of the anchor rod 1 are respectively penetrated into the small holes 31 of the anchor head 3, and the anchor rod U-shaped groove 111 on the anchor rod ends 11 is aligned with the unidirectional bearing notch 41 on the unidirectional bearing 4 and is placed into the wedge block 5.
(6) And (3) placing a force spanner at the hexagon nut 12 of the anchor rod 1, and pulling the force spanner to drive the two anchor rods 1 and the clamping pieces 2 wound with the fiber cloth 6 to rotate, so that the tensile stress in the fiber cloth 6 is gradually increased until the required control stress is loaded, namely, the reinforcement of the reinforced concrete cylinder 8 is completed.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make modifications or additions to the described embodiments or substitutions in a similar manner without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (1)
1. The rotary self-locking tensioning anchoring device for the prestressed fiber cloth is characterized by comprising two anchor rods (1), two clamping pieces (2), two anchor heads (3), four unidirectional bearings (4) for maintaining prestress, eight wedge blocks (5) and fiber cloth (6); the anchor rod (1) consists of anchor rod end heads (11) at two ends, a hexagonal nut (12) and an anchor body (13), wherein the anchor rod end heads (11) at two ends are respectively provided with an anchor rod U-shaped groove (111), and two ends of the anchor body (13) are provided with clamping piece mounting holes (131); two ends of the clamping piece (2) are correspondingly provided with clamping piece mounting holes (131), and screws (21) penetrate through the corresponding clamping piece mounting holes (131) to fixedly connect the clamping piece (2) with the anchor rod (1); the anchor head (3) is provided with two mounting holes, each mounting hole consists of a small hole (31) and a large hole (32), the diameters and depths of the small holes (31) and the large holes (32) are consistent with those of an anchor rod end (11) and a one-way bearing (4) which are connected with the anchor head (3), and an anchor head U-shaped groove (321) is formed in the large hole (32);
the end part of the fiber cloth (6) is clamped between the anchor rod (1) and the clamping piece (2) and is wound for 1-2 circles; the four unidirectional bearings (4) are respectively placed in the large holes (32) of the two anchor heads (3) while paying attention to the direction of the unidirectional bearings (4), and the unidirectional bearing U-shaped grooves (42) on the unidirectional bearings (4) are aligned with the anchor head U-shaped grooves (321) on the anchor heads (3) and placed in the wedge blocks (5); wrapping fiber cloths (6) with two ends wound between the anchor rod (1) and the clamping pieces (2) at positions required to be reinforced by the reinforced concrete pier column to be reinforced, penetrating anchor rod ends (11) at the two ends of the anchor rod (1) into small holes (31) of the anchor head (3), aligning anchor rod U-shaped grooves (111) on the anchor rod ends (11) with unidirectional bearing notches (41) on the unidirectional bearings (4), and placing the wedge blocks (5); the method comprises the steps of placing a force spanner at a hexagon nut (12) of an anchor rod (1), and pulling the force spanner to drive the two anchor rods (1) and clamping pieces (2) wound with fiber cloth (6) to rotate, so that the tensile stress in the fiber cloth (6) is gradually increased until the fiber cloth is loaded to required control stress;
the anchor head (3) respectively selects an L-shaped flat plate clung to the surface of the square column or an arc plate clung to the surface of the column according to the square column or the column of the reinforced concrete pier column to be reinforced;
the blanking length of the fiber cloth (6) is equal to 1-2 times of the perimeter of the anchor rod (1) of the Zhou Changjia column at the wrapping position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710465990.XA CN107059664B (en) | 2017-06-19 | 2017-06-19 | Rotary self-locking tensioning anchoring device for prestressed fiber cloth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710465990.XA CN107059664B (en) | 2017-06-19 | 2017-06-19 | Rotary self-locking tensioning anchoring device for prestressed fiber cloth |
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| Publication Number | Publication Date |
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| CN107059664A CN107059664A (en) | 2017-08-18 |
| CN107059664B true CN107059664B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710465990.XA Active CN107059664B (en) | 2017-06-19 | 2017-06-19 | Rotary self-locking tensioning anchoring device for prestressed fiber cloth |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794849B (en) * | 2017-11-05 | 2024-02-06 | 桂林理工大学 | Construction method for reinforcing column by adopting prestressed fiber cloth of detachable tensioning anchorage |
| CN109098095B (en) * | 2018-10-19 | 2023-12-19 | 佛山科学技术学院 | Auxiliary equipment for preventing reinforcing steel bar stress loss for beam making |
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2017
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Application publication date: 20170818 Assignee: Guangxi hanximing Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2023980046009 Denomination of invention: Rotating self-locking tensioning and anchoring device for prestressed fiber cloth Granted publication date: 20230811 License type: Common License Record date: 20231108 |