CN112942145A - Prestressed anchoring device for concrete bridge and construction method thereof - Google Patents
Prestressed anchoring device for concrete bridge and construction method thereof Download PDFInfo
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- CN112942145A CN112942145A CN202110144634.4A CN202110144634A CN112942145A CN 112942145 A CN112942145 A CN 112942145A CN 202110144634 A CN202110144634 A CN 202110144634A CN 112942145 A CN112942145 A CN 112942145A
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- rectangular frame
- tensioning
- cloth
- carbon fiber
- top plate
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- 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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/12—Pavings made of prefabricated single units made of units with bituminous binders or from bituminous material, e.g. asphalt mats
Abstract
The invention relates to a prestressed anchoring device for a concrete bridge and a construction method thereof, wherein the anchoring device comprises a rectangular frame, a fixing part, a tensioning part and carbon fiber cloth which is positioned between the fixing part and the tensioning part and clings to the construction surface of the bridge; waist-shaped through holes are formed in the two side edges of the rectangular frame along the length direction of the rectangular frame, the tensioning part is positioned on the inner side of the rectangular frame and is arranged in a sliding mode along the length direction of the rectangular frame through the waist-shaped through holes, and the fixing part is anchored on a bridge construction surface on the length extension line of the rectangular frame; the construction method comprises the steps of firstly anchoring the fixed part, arranging a jack between the tensioning part and the rectangular frame, pushing the tensioning part by the jack to tension the carbon fiber cloth, and fixing the tensioning part on the bridge installation surface after the carbon fiber cloth is tensioned in place; and after the carbon fiber cloth is adhered, the fixing part, the rectangular frame and the tensioning part are detached. The invention can effectively solve the problems that the existing carbon fiber cloth tensioning anchor is complex in structure and troublesome in construction, and the tensile strength and the construction efficiency of the carbon fiber cloth are difficult to ensure.
Description
Technical Field
The invention relates to the technical field of concrete bridge reinforcement, in particular to a prestressed anchoring device for a concrete bridge and a construction method thereof.
Background
On one hand, because the design standard is lower, except that the bridge built according to the design standard published in 1972 and 1982 of the ministry of transportation can basically meet the recent traffic, the bridge built before, particularly in the later 50 s and 60 s, mostly bears the vehicle load exceeding the design load for a long time; on the other hand, due to the problems in the aspects of bridge design, construction, maintenance, management, surrounding environment and the like and the unexpected disasters suffered by the bridge in the using process, such as earthquake, flood, unexpected impact and the like, the existing reinforced concrete bridge has insufficient bearing capacity, the technical condition is rapidly reduced, or the phenomena of aging, damage, cracks and the like occur, so that the dangerous bridge is increased, and the influence on driving is increased. The bridge becomes a neck for road traffic, the smoothness of the whole line is seriously influenced, and the bridge also becomes a place with multiple traffic accidents.
The reinforced concrete bridge cracks more generally, the reinforced concrete bridge is reinforced by the carbon fiber cloth, the reinforced concrete bridge is widely applied to civil engineering, and the reinforced carbon fiber cloth has the advantages of high strength, high efficiency, convenience and quickness in construction, high construction efficiency, no increase of the self weight and the section size of the structure, wide application range, corrosion resistance and the like. The carbon fiber cloth is adhered to the outer surface of the concrete, so that the original structural form is not damaged, the bending strength, the shearing strength and the compressive strength of the section of the concrete member can be improved, and in addition, a certain constraint effect on the generation and the development of cracks can be realized. When pasting, carbon cloth need guarantee steadily, accurate, even, make carbon cloth wrinkle not, do not fold, guarantee that the exhibition is extended smoothly, but current carbon cloth stretch-draw ground tackle structure is comparatively complicated, and the construction is troublesome, is difficult to guarantee carbon cloth tensile strength and bridge reinforcement work high-efficiently. Therefore, it is necessary to design a new technical solution to comprehensively solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a prestressed anchoring device for a concrete bridge and a construction method thereof, which can effectively solve the problems that the existing carbon fiber cloth tensioning anchor is complex in structure and troublesome in construction, and the tensile strength of the carbon fiber cloth is difficult to ensure to be fully utilized and the construction efficiency is low.
In order to solve the technical problems, the invention adopts the following technical scheme:
a prestressed anchorage device for a concrete bridge comprises a frame assembly, a fixing part, a tensioning part and carbon fiber cloth, wherein the frame assembly, the fixing part and the tensioning part are arranged on a bridge construction surface;
the frame assembly is a rectangular frame, waist-shaped through holes are formed in the two side edges of the rectangular frame along the length direction of the rectangular frame, and the tensioning part is located on the inner side of the rectangular frame and is arranged in a sliding mode along the length direction of the rectangular frame through the waist-shaped through holes; the fixed part is anchored on a bridge construction surface on the length extension line of the rectangular frame;
the fixed part and the tensioning part both comprise clamping assemblies, each clamping assembly comprises two cloth clamping shafts and a fixed base, the two cloth clamping shafts are spliced along the axial direction to form a cylinder, and the end parts of the carbon fiber cloth are clamped at the joint of the two cloth clamping shafts; the fixed base is positioned at two ends of the two cloth clamping shafts, clamps the spliced two cloth clamping shafts and limits the circumferential rotation of the two cloth clamping shafts, and anchor holes for anchoring on a bridge construction surface are formed in the fixed base;
the tensioning part also comprises a tensioning top plate, the tensioning top plate is arranged on one side, close to the fixed part, of the clamping assembly of the tensioning part, a jack is arranged between the tensioning top plate and the inner side of the rectangular frame, the jack works to push the tensioning top plate to move in the direction far away from the fixed part, and the tensioning top plate drives the clamping assembly of the tensioning part to move along the length direction of the rectangular frame until the carbon fiber cloth is tensioned in place; and the fastening anchor bolt penetrates through the anchor hole of the tensioning part fixing base to anchor the tensioning part clamping assembly tensioned in place to the bridge construction surface.
Preferably, four corners of the rectangular frame, which are close to one side of the bridge construction surface, are provided with supporting legs for anchoring the bridge, the supporting legs support the rectangular frame, and gaps are formed between the bridge construction surface and the rectangular frame; two cloth clamping shafts of the tensioning part are positioned in the gap, two ends of each cloth clamping shaft extend out of the rectangular frame, and two ends of each cloth clamping shaft are sleeved into the fixing base respectively and are fixed on the bridge construction surface through the fixing bases.
Preferably, set up the balanced through-hole that uses with waist type through-hole cooperation along rectangular frame's width direction in the stretch-draw roof, in the balanced through-hole interpolation establish balanced axle, balanced axle both ends extend to corresponding waist type through-hole, the balanced axle drives the stretch-draw roof along rectangular frame length direction motion.
Preferably, the fixed base comprises a base body and anchoring wing plates arranged on two sides of the base body and used for connecting a bridge construction surface, and the anchoring holes are formed in the anchoring wing plates; the base body is provided with a square through hole at the joint of the two cloth clamping shafts, the two cloth clamping shafts are consistent in shape, square limiting blocks are arranged at the two ends of the two cloth clamping shafts, and the two cloth clamping shafts are spliced to form a square limiting block which is accommodated in the square through hole.
Preferably, the square limiting block is further provided with a connecting hole, and a connecting bolt for connecting the two cloth clamping shafts is inserted into the connecting hole.
Preferably, the tensioning top plate and one face, in contact with the jack, of the rectangular frame are provided with grooves for preventing the jack from shifting.
Preferably, one side of the tensioning top plate, which is far away from the jack, is provided with a fixing device, the fixing device comprises a fixing screw rod, the axial direction of the fixing screw rod is consistent with the length direction of the rectangular frame, one end of the fixing screw rod is fixed on the tensioning top plate, the other end of the fixing screw rod penetrates through the rectangular frame, and the end part of the fixing screw rod is in threaded connection with a flange nut.
The construction method of the prestressed anchoring device for the concrete bridge comprises the following steps:
s1, pretreating a bridge construction surface, clamping one end of carbon fiber cloth between two cloth clamping shafts of a fixing part, rotating at least one circle along the circumferential direction of the cloth clamping shafts to fix the carbon fiber cloth on the cloth clamping shafts, then installing fixing bases at two ends of the cloth clamping shafts, and anchoring the fixing bases on the bridge construction surface;
s2, clamping the other end of the carbon fiber cloth between two cloth clamping shafts of the tensioning part, rotating at least one circle along the circumferential direction of the cloth clamping shafts to fix the carbon fiber cloth on the cloth clamping shafts, then installing fixed bases at two ends of the cloth clamping shafts, placing a tensioning top plate on the fixed bases, and finally installing a rectangular frame on the assembled clamping assembly and the tensioning top plate;
s3, straightening the carbon fiber cloth, anchoring the rectangular frame assembled in the step S2 on a bridge construction surface, and then installing a jack between the tensioning top plate close to the fixed part side and the rectangular frame, wherein the jack works to push the tensioning top plate to move in a direction away from the fixed part, and the tensioning top plate drives a clamping assembly of the tensioning part to move so as to tension the carbon fiber cloth;
and S4, after the carbon fiber cloth is tensioned in place, anchoring the fixed base of the tensioning part to the construction surface of the bridge, brushing glue on the carbon cloth after tensioning is finished, and then detaching the fixed part, the rectangular frame and the tensioning top plate.
The prestressed anchoring device for the concrete bridge is provided with the frame assembly, the fixing part and the tensioning part, the carbon fiber cloth is fixed between the tensioning part and the fixing part, two cloth clamping shafts spliced into a cylinder are arranged for clamping the carbon fiber cloth, and the two cloth clamping shafts are clamped through the fixing base, so that the carbon fiber cloth can be effectively fixed while the simple structure is ensured; during the use, earlier with carbon cloth one end around establishing at the clamp cloth of fixed part epaxial, and fix at the bridge construction face through unable adjustment base, later with the carbon cloth other end around establishing at the clamp cloth of movable part epaxial, and installation unable adjustment base, at last through set up the jack between stretch-draw roof and frame subassembly, utilize the jack to promote stretch-draw roof along rectangular frame length direction motion, until carbon cloth by stretch-draw target in place, fix the movable part at the bridge construction face and can realize carbon cloth's tensioning, and then accomplish carbon cloth's the work of laying, the maximum strength effect of effective performance carbon cloth.
For the bridge construction surface with low flatness, if surface contact is adopted, unstable connection can be caused.
In order to better match with the rectangular frame, the tensioning top plate is internally provided with the balance through hole, the balance shaft is inserted in the balance through hole and is positioned in the waist-shaped through hole of the rectangular frame to drive the tensioning top plate to move along the length direction of the rectangular frame, and the structure has the advantages of simple manufacture, strong detachability and great convenience for disassembly after construction. Equally, set up square through hole on unable adjustment base's the base body to pressing from both sides cloth axle both ends and setting up square stopper, when two are pressed from both sides the concatenation of cloth axle, square stopper holds in square through hole, utilizes square through hole to restrict to press from both sides cloth axle when pressing from both sides tightly and follow its circumferential direction, has effectively fixed the carbon cloth who presss from both sides tightly in pressing from both sides the cloth axle, prepares for follow-up stretch-draw and paste.
Finally, in order to improve the connection stability and accuracy of the two spliced cloth clamping shafts, the two cloth clamping shafts are aligned and fastened through the connecting bolts by arranging the connecting holes in the square limiting blocks of the cloth clamping shafts, so that the clamping degree of the carbon fiber cloth is further improved; in addition, in order to prevent the jack from shifting when in use, grooves are formed in the tensioning top plate and the rectangular frame, so that the construction stability and safety can be effectively guaranteed. In order to further improve the balance and stability of the tensioning top plate, a fixing screw rod and a flange nut are further arranged on one side of the tensioning top plate, which is far away from the jack, so that the tensioning top plate is prevented from shifting and the stability of a tensioning process is improved.
Drawings
FIG. 1 is a schematic structural view of a prestressed anchorage device for concrete bridges according to the present invention;
FIG. 2 is a schematic view of the construction of the frame assembly and tension section of the present invention;
FIG. 3 is a schematic view of the clamping assembly of the present invention;
fig. 4 is a schematic structural view of the tensioned top panel according to the present invention.
In the figure: 1. a rectangular frame; 11. a waist-shaped through hole; 12. supporting legs; 13. a gap; 2. a tension section; 21. tensioning the top plate; 211. a balance through hole; 212. a balance shaft; 22. fixing the screw rod; 221. a flange nut; 3. carbon fiber cloth; 4. a fixed part; 5. a clamping assembly; 51. a cloth clamping shaft; 511. a square limiting block; 512. connecting holes; 513. a connecting bolt; 52. a base body; 521. a square through hole; 522. anchoring the wing plate; 523. an anchor eye; 6. and (4) a groove.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.
Example 1
The technical solution adopted in this embodiment is shown in fig. 1 to 4, and is a prestressed anchoring device for a concrete bridge, which includes a frame assembly installed at the bottom of the bridge, a fixing portion 4, a tensioning portion 2, and a carbon fiber cloth 3 located between the fixing portion 4 and the tensioning portion 2 and closely attached to the construction surface of the bridge.
Specifically, the fixing part 4 and the tensioning part 2 both comprise a clamping assembly 5 as shown in fig. 3, the clamping assembly 5 comprises two cloth clamping shafts 51 and a fixing base, the two cloth clamping shafts 51 are arranged on the cloth clamping shafts 51 and are spliced along the axial direction to form a cylinder, and the end part of the carbon fiber cloth 3 is clamped at the joint of the two cloth clamping shafts 51; the fixed base is positioned at two ends of the two cloth clamping shafts 51, clamps the spliced two cloth clamping shafts 51 and limits the circumferential rotation of the two cloth clamping shafts 51, and is also provided with an anchor hole 523 for anchoring on a bridge construction surface; the fixed base comprises a base body 52 and anchoring wing plates 522 which are arranged on two sides of the base body 52 and used for connecting a bridge construction surface, wherein anchor holes 523 are formed in the anchoring wing plates 522; a square through hole 521 is formed at the joint of the base body 52 and the two cloth clamping shafts 51, the two cloth clamping shafts 51 are identical in shape, square limiting blocks 511 are arranged at two ends of each cloth clamping shaft 51, and the two cloth clamping shafts 51 are spliced to form the rear limiting blocks 511 which are accommodated in the square through hole 521; the square limiting block 511 is also provided with a connecting hole 512, and a connecting bolt 513 for connecting the two cloth clamping shafts 51 is inserted into the connecting hole 512; the fixed part is when the construction, earlier press from both sides between the cloth axle with the carbon cloth centre gripping at two, later rotate double-layered cloth axle a week after the concatenation half, insert connecting bolt 513 simultaneously and locate in connecting hole 512, connecting bolt and connecting hole cooperation are used not only can aim at double-layered cloth axle, can also realize the fastening to two double-layered cloth axles, here connecting bolt's both ends do not all exceed connecting hole both ends face, later insert unable adjustment base's square through-hole alignment square stopper, and insert anchor hole 523 on the anchor pterygoid lamina 522 through the chemistry crab-bolt, install whole fixed part at the bridge construction face.
As shown in fig. 2, the frame assembly of the present embodiment is a rectangular frame 1, waist-shaped through holes 11 are formed at two side edges of the rectangular frame 1 along the length direction thereof, and the tensioning portion 2 is located at the inner side of the rectangular frame 1 and is slidably disposed along the length direction of the rectangular frame 1 through the waist-shaped through holes 11; the fixing part 4 is anchored on the bridge construction surface on the length extension line of the rectangular frame 1; in order to avoid the problem of instable installation caused by uneven bridge construction surface, in the embodiment, supporting legs 12 for anchoring the bridge are arranged at four corners of one side, close to the bridge construction surface, of the rectangular frame 1, the supporting legs 12 support the rectangular frame 1, and gaps 13 are formed between the bridge construction surface and the rectangular frame 1; two cloth clamping shafts 51 of the tensioning part 2 are positioned in the gap 13, two ends of the two cloth clamping shafts 51 extend out of the rectangular frame 1, two ends of the cloth clamping shafts 51 are respectively sleeved into the fixed base and are fixed on the bridge construction surface through the fixed base; therefore, the problem of uneven construction surface can be effectively solved, and the contact between the rectangular frame and the bridge construction surface is more stable and accurate due to the point contact of the four corners.
With reference to fig. 1 and 4, the tensioning portion 2 further includes a tensioning top plate 21, a balance through hole 211 matched with the waist-shaped through hole 11 is formed in the tensioning top plate 21 along the width direction of the rectangular frame 1, a balance shaft 212 is inserted into the balance through hole 211, two ends of the balance shaft 212 extend into the corresponding waist-shaped through hole 11, and the balance shaft 212 drives the tensioning top plate 21 to move along the length direction of the rectangular frame 1; the tensioning top plate 21 is specifically installed on an anchoring wing plate 522 on one side, close to the fixing portion 4, of the tensioning portion fixing base and can be inserted or directly prevented from being inserted through bolts, a jack is installed between the tensioning top plate 21 and the inner side of the rectangular frame 1, grooves 6 for preventing the jack from moving are formed in the tensioning top plate 21 and one face, contacting with the jack, of the rectangular frame 1, the jack works to push the tensioning top plate 21 to move towards the direction far away from the fixing portion 4, and the tensioning top plate 21 drives the clamping assembly 5 of the tensioning portion 2 to move along the length direction of the rectangular frame 1 until the carbon fiber cloth 3 is tensioned to a set value; and the chemical anchor bolt penetrates through the anchor hole 523 of the fixed base of the tensioning part 2 to anchor the clamping component 5 of the tensioning part 2 tensioned in place to the bridge construction surface. In addition, in order to prevent the displacement of the tensioning top plate and improve the tensioning stability, a fixing screw 22 with the axial direction consistent with the length direction of the rectangular frame is arranged on one side, away from the jack, of the tensioning top plate 21, one end of the fixing screw 22 is fixed on the tensioning top plate 21, the other end of the fixing screw penetrates through the rectangular frame, a flange nut 221 is screwed at the end part of the fixing screw, a through hole slightly larger than the fixing screw is formed in the rectangular frame, the fixing screw also slides in the through hole, and the fixing screw can be screwed through the flange nut, so that the.
The prestressed anchorage device for concrete bridge of this embodiment, simple structure, convenient to use, each part all can be dismantled the connection, and the dismantlement work after portable and the construction adopts the clamp cloth axle to carry out the centre gripping of large tracts of land to carbon cloth simultaneously, effectively solves the problem that current carbon cloth stretch-draw ground tackle structure is complicated, the construction is troublesome and be difficult to guarantee carbon cloth tensile strength and efficiency of construction low.
Example 2
The embodiment is a construction method of the prestressed anchoring device for the concrete bridge in embodiment 1, and the method includes the following steps:
s1, pretreating a bridge construction surface, clamping one end of carbon fiber cloth between two cloth clamping shafts of a fixing part, rotating the cloth clamping shafts for half a circle in the circumferential direction to fix the carbon fiber cloth on the cloth clamping shafts, then installing fixing bases at two ends of the cloth clamping shafts, and anchoring the fixing bases on the bridge construction surface through chemical anchor bolts;
s2, clamping the other end of the carbon fiber cloth between two cloth clamping shafts of the tensioning part, rotating the carbon fiber cloth for half a circle along the circumferential direction of the cloth clamping shafts to fix the carbon fiber cloth on the cloth clamping shafts, then installing fixed bases at two ends of the cloth clamping shafts, placing a tensioning top plate on an anchoring wing plate of the fixed bases, and finally installing a rectangular frame on the assembled clamping assembly and the tensioning top plate;
s3, straightening the carbon fiber cloth, anchoring the rectangular frame assembled in the step S2 on a bridge construction surface, and then installing a jack between the tensioning top plate close to the fixed part side and the rectangular frame, wherein the jack works to push the tensioning top plate to move in a direction away from the fixed part, and the tensioning top plate drives a clamping assembly of the tensioning part to move so as to tension the carbon fiber cloth;
s4, after the carbon fiber cloth is tensioned in place, the flange nut is screwed down, the fixing base of the tensioning portion is anchored on the bridge construction surface, the carbon cloth is brushed with glue after tensioning is finished, and then the fixing portion, the rectangular frame and the tensioning top plate are detached.
The construction method of the embodiment stretches the clamped carbon fiber cloth, and ensures that the carbon fiber cloth is kept in a pre-stressed state with a set value so as to exert the maximum strength effect; in addition, the length of the two ends of the carbon fiber cloth clamped by the cloth clamping shaft is shorter, so that the waste of the carbon fiber cloth can be effectively avoided; and finally, all the used parts can be detached after the carbon fiber cloth is adhered, so that the recycling degree is high, and a large amount of construction cost can be saved.
The present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent changes and substitutions without departing from the principle of the present invention after learning the content of the present invention, and these equivalent changes and substitutions should be considered as belonging to the protection scope of the present invention.
Claims (8)
1. The utility model provides a prestressed anchorage device for concrete bridge which characterized in that: the device comprises a frame component, a fixing part, a tensioning part and carbon fiber cloth, wherein the frame component, the fixing part and the tensioning part are arranged on a bridge construction surface;
the frame assembly is a rectangular frame, waist-shaped through holes are formed in the two side edges of the rectangular frame along the length direction of the rectangular frame, and the tensioning part is located on the inner side of the rectangular frame and is arranged in a sliding mode along the length direction of the rectangular frame through the waist-shaped through holes; the fixed part is anchored on a bridge construction surface on the length extension line of the rectangular frame;
the fixed part and the tensioning part both comprise clamping assemblies, each clamping assembly comprises two cloth clamping shafts and a fixed base, the two cloth clamping shafts are spliced along the axial direction to form a cylinder, and the end parts of the carbon fiber cloth are clamped at the joint of the two cloth clamping shafts; the fixed base is positioned at two ends of the two cloth clamping shafts, clamps the spliced two cloth clamping shafts and limits the circumferential rotation of the two cloth clamping shafts, and anchor holes for anchoring on a bridge construction surface are formed in the fixed base;
the tensioning part also comprises a tensioning top plate, the tensioning top plate is arranged on one side, close to the fixed part, of the clamping assembly of the tensioning part, a jack is arranged between the tensioning top plate and the inner side of the rectangular frame, the jack works to push the tensioning top plate to move in the direction far away from the fixed part, and the tensioning top plate drives the clamping assembly of the tensioning part to move along the length direction of the rectangular frame until the carbon fiber cloth is tensioned in place; and the fastening anchor bolt penetrates through the anchor hole of the tensioning part fixing base to anchor the tensioning part clamping assembly tensioned in place to the bridge construction surface.
2. The prestressed anchoring apparatus for concrete bridges of claim 1, wherein: supporting legs for anchoring the bridge are arranged at four corners of one side of the rectangular frame, which is close to the bridge construction surface, and the supporting legs support the rectangular frame, so that a gap is formed between the bridge construction surface and the rectangular frame; two cloth clamping shafts of the tensioning part are positioned in the gap, two ends of each cloth clamping shaft extend out of the rectangular frame, and two ends of each cloth clamping shaft are sleeved into the fixing base respectively and are fixed on the bridge construction surface through the fixing bases.
3. The prestressed anchoring apparatus for concrete bridges of claim 1, wherein: set up the balanced through-hole that uses with waist type through-hole cooperation along rectangular frame's width direction in the stretch-draw roof, in the balanced through-hole interpolation establish balanced axle, balanced axle both ends extend to the waist type through-hole that corresponds, the balanced axle drives the stretch-draw roof along rectangular frame length direction motion.
4. The prestressed anchoring apparatus for concrete bridges of claim 1, wherein: the fixed base comprises a base body and anchoring wing plates arranged on two sides of the base body and used for connecting a bridge construction surface, and the anchor holes are formed in the anchoring wing plates; the base body is provided with a square through hole at the joint of the two cloth clamping shafts, the two cloth clamping shafts are consistent in shape, square limiting blocks are arranged at the two ends of the two cloth clamping shafts, and the two cloth clamping shafts are spliced to form a square limiting block which is accommodated in the square through hole.
5. The prestressed anchoring apparatus for concrete bridges of claim 4, wherein: the square limiting block is further provided with a connecting hole, and a connecting bolt for connecting the two cloth clamping shafts is inserted into the connecting hole.
6. The prestressed anchoring apparatus for concrete bridges of claim 1, wherein: and grooves for preventing the jack from moving are formed in the tensioning top plate and one surface of the rectangular frame, which is in contact with the jack.
7. The prestressed anchoring apparatus for concrete bridges of claim 1, wherein: one side of the tensioning top plate, which is far away from the jack, is provided with a fixing device, the fixing device comprises a fixing screw rod, the axial direction of the fixing screw rod is consistent with the length direction of the rectangular frame, one end of the fixing screw rod is fixed on the tensioning top plate, the other end of the fixing screw rod penetrates through the rectangular frame, and the end part of the fixing screw rod is in threaded connection with a flange nut.
8. A construction method of the pre-stressed anchoring device for the concrete bridge according to claim 1, characterized by comprising the following steps:
s1, pretreating a bridge construction surface, clamping one end of carbon fiber cloth between two cloth clamping shafts of a fixing part, rotating at least one circle along the circumferential direction of the cloth clamping shafts to fix the carbon fiber cloth on the cloth clamping shafts, and finally installing fixing bases at two ends of the cloth clamping shafts and anchoring the fixing bases on the bridge construction surface;
s2, clamping the other end of the carbon fiber cloth between two cloth clamping shafts of the tensioning part, rotating at least one circle along the circumferential direction of the cloth clamping shafts to fix the carbon fiber cloth on the cloth clamping shafts, then installing fixed bases at two ends of the cloth clamping shafts, installing a tensioning top plate on the fixed bases, and finally installing a rectangular frame on the assembled clamping assembly and the tensioning top plate;
s3, straightening the carbon fiber cloth, anchoring the rectangular frame assembled in the step S2 on a bridge construction surface, and then installing a jack between the tensioning top plate close to the fixed part side and the rectangular frame, wherein the jack works to push the tensioning top plate to move in a direction away from the fixed part, and the tensioning top plate drives a clamping assembly of the tensioning part to move so as to tension the carbon fiber cloth;
and S4, after the carbon fiber cloth is tensioned in place, anchoring the fixed base of the tensioning part to the construction surface of the bridge, brushing glue on the carbon cloth after tensioning is finished, and then detaching the fixed part, the rectangular frame and the tensioning top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110144634.4A CN112942145A (en) | 2021-02-02 | 2021-02-02 | Prestressed anchoring device for concrete bridge and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110144634.4A CN112942145A (en) | 2021-02-02 | 2021-02-02 | Prestressed anchoring device for concrete bridge and construction method thereof |
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| Publication Number | Publication Date |
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| CN112942145A true CN112942145A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110144634.4A Pending CN112942145A (en) | 2021-02-02 | 2021-02-02 | Prestressed anchoring device for concrete bridge and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134824A (en) * | 2021-08-25 | 2022-03-04 | 江苏泊翔结构加固工程有限公司 | Bridge prestressing force carbon cloth tension anchor |
| CN114182981A (en) * | 2022-01-21 | 2022-03-15 | 江苏易鼎电力科技有限公司 | Novel carbon-fibre composite section bar anchor |
-
2021
- 2021-02-02 CN CN202110144634.4A patent/CN112942145A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134824A (en) * | 2021-08-25 | 2022-03-04 | 江苏泊翔结构加固工程有限公司 | Bridge prestressing force carbon cloth tension anchor |
| CN114134824B (en) * | 2021-08-25 | 2024-02-27 | 江苏泊翔结构加固工程有限公司 | Bridge prestress carbon fiber cloth stretching anchoring device |
| CN114182981A (en) * | 2022-01-21 | 2022-03-15 | 江苏易鼎电力科技有限公司 | Novel carbon-fibre composite section bar anchor |
| CN114182981B (en) * | 2022-01-21 | 2023-01-31 | 江苏易鼎电力科技有限公司 | Carbon-fibre composite section bar anchor |
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