CN209907233U - Carbon fiber plate reverse tension prestressed anchorage - Google Patents
Carbon fiber plate reverse tension prestressed anchorage Download PDFInfo
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- CN209907233U CN209907233U CN201920460492.0U CN201920460492U CN209907233U CN 209907233 U CN209907233 U CN 209907233U CN 201920460492 U CN201920460492 U CN 201920460492U CN 209907233 U CN209907233 U CN 209907233U
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Abstract
The utility model relates to a carbon fiber plate reverse tensioning prestressed anchorage device, which comprises a tensioning end tensioning component, a fixed end fixing component and a tensioning tool for assisting the tensioning of a carbon fiber plate, wherein the tensioning end tensioning component and the fixed end fixing component are fixedly arranged on concrete and used for clamping the carbon fiber plate; the tensioning end tensioning assembly comprises a tensioning end fixing plate fixedly arranged on concrete and a tensioning end clamp used for clamping the carbon fiber plate; the fixed end fixing component comprises a fixed end fixing plate fixedly arranged on concrete and a fixed end clamp used for clamping the carbon fiber plate; the tensioning tool comprises a tensioning screw, a tensioning thrust plate and a tensioning top plate; and a jack is arranged between the tension thrust plate and the tension top plate to push the tension end clamp to realize reverse tension of the carbon fiber plate. The utility model not only makes the reinforced concrete member evenly stressed and maintain the stress for a long time; and the concrete surface is not required to be grooved, so that the distance between the installed prestressed carbon plate and the concrete surface can be minimized, and the secondary damage to the concrete is avoided.
Description
Technical Field
The utility model relates to a building field, in particular to reverse stretch-draw prestressed anchorage utensil of carbon fiber plate that bridge traffic field used.
Background
The conventional anchorage device is a permanent anchorage device used in prestressed concrete, and is an anchorage tool, also called a prestressed anchorage device, used in post-tensioning structure or member to maintain the tension of prestressed tendons and transmit the tension to the interior of concrete.
With the rapid development of the transportation industry, all levels of highway bridges constructed in the past are still carrying increasing traffic loads and traffic flows on shoulders. Due to the limitations of early design, construction, maintenance and other technical conditions, the old bridge gradually generates diseases. Although the service life of a newly built bridge in recent years is short, due to the reasons that the demand of economic development is pulled, vehicles are overloaded, the overload operation of roads and bridges and the estimation of the design load of the bridge are insufficient, diseases are left after construction, a maintenance management time window is compressed, and the like, diseases such as premature cracking and the like also appear on part of the bridge. In the face of a huge number of problematic bridges, it is not reasonable to totally dismantle and rebuild, both from the standpoint of financial funds and guaranteed traffic capacity, and it is a necessary trend to pertinently reinforce the conditional bridges. The carbon fiber plate has the characteristics of light dead weight, corrosion resistance, fatigue resistance, high tensile strength and the like, and is very suitable for reinforcing concrete bridges. Traditional carbon fiber plate prestressing force ground tackle can only realize exerting the prestressing force to the concrete through the principle of both ends centre gripping carbon fiber plate cisoid stretch-draw. Due to high control requirements of the construction process, the technical levels of all construction units are uneven, the quality of products (such as anchor clamps, carbon fiber plates, structural adhesives and the like) of all parts of the prestressed system, particularly the quality of the prestressed system formed after mutual matching is difficult to control, and the reliable clamping force of the traditional anchor on the carbon fiber plates is difficult to guarantee. Under the condition that the carbon fiber plate reaches the design tensile strength and the normalized impact fatigue load in the service period during construction, the clamping force of the anchorage device must ensure that the plate does not slide, and meanwhile, the anchor bolt for fixing the anchorage device must not be sheared and damaged or the steel of the anchor bolt screw is sheared during the stress work, otherwise, the expected reinforcement effect cannot be realized, so that the resource waste and the bridge safety hidden danger are caused; in addition, the traditional anchorage device is stretched in the forward direction, so that enough construction space needs to be reserved at the stretching end, so that the effective prestressed coverage area is asymmetric, and the overall design work difficulty is increased; in addition, when the traditional anchorage device is installed, a groove needs to be formed in the surface of the concrete member, and the anchorage device is embedded into a part of the concrete member, so that the carbon fiber plate and the surface of the concrete can reach an ideal distance to ensure the transmission effect of the structural adhesive load, and secondary damage is generated on the foundation of the concrete member.
SUMMERY OF THE UTILITY MODEL
The utility model provides a carbon fiber plate reverse tension prestressed anchorage device for solving the problems, which not only makes the reinforced concrete member receive stress uniformly, but also maximizes the length range of the applied stress; and the concrete surface is not required to be grooved, so that the distance between the carbon plate and the concrete surface can be minimized, and the secondary damage to the concrete member is avoided.
To achieve the above object, the present invention is implemented as follows: a carbon fiber plate reverse tensioning pre-stress anchor comprises a tensioning end tensioning assembly, a fixed end fixing assembly and a tensioning tool, wherein the tensioning end tensioning assembly and the fixed end fixing assembly are fixedly arranged on concrete and used for clamping and tensioning a carbon fiber plate, and the tensioning tool is used for assisting in tensioning the carbon fiber plate;
the tensioning end tensioning assembly comprises a tensioning end fixing plate fixedly arranged on concrete and a tensioning end clamp used for clamping the carbon fiber plate, and the tensioning end clamp is arranged on the tensioning end fixing plate; the tensioning end clamp comprises a tensioning end clamp bottom plate and a tensioning end clamp cover plate which are buckled with each other, and a corrugated chute for placing the carbon fiber plate is vertically arranged in the middle of the tensioning end clamp bottom plate; the corrugated boss for compressing the carbon fiber plate is correspondingly arranged in the middle of the tension end clamp cover plate; a fixed screw is arranged on the tensioning end clamp cover plate, and the other end of the fixed screw is fixedly arranged on the tensioning end fixing plate after tensioning is finished;
the fixed end fixing assembly comprises a fixed end fixing plate fixedly arranged on concrete and a fixed end clamp used for clamping the carbon fiber plate, and the fixed end clamp is fixed by mutual complementation and occlusion of the male and female concave-convex grooves on the two outer sides and the male and female concave-convex grooves on the two inner sides of the fixed end fixing plate; the fixed end clamp comprises a fixed end clamp bottom plate and a fixed end clamp cover plate which are buckled together, wherein a corrugated chute for placing the carbon fiber plate is vertically arranged in the middle of the fixed end clamp bottom plate, and a corrugated boss which is used for preventing the carbon fiber plate from sliding when being compressed is correspondingly arranged in the middle of the fixed end clamp cover plate;
the tensioning tool comprises a tensioning screw, a tensioning thrust plate and a tensioning top plate; one end of the tensioning screw is in threaded connection with the tensioning end fixing plate, the tensioning thrust plate is installed at the other end of the tensioning screw, the tensioning top plate is installed at the front end of the tensioning end clamp, and a jack is placed between the tensioning thrust plate and the tensioning top plate to push the tensioning end clamp to achieve reverse tensioning of the carbon fiber plate.
The further optimization scheme is that the stretching end fixing plate and the fixed end fixing plate are fixed on the concrete through chemical anchor bolts, waist-shaped holes are formed in the stretching end fixing plate and the fixed end fixing plate, and the chemical anchor bolts penetrate through the waist-shaped holes and are fixed on the concrete.
The further optimization scheme is that the waist-shaped hole is internally provided with an eccentric inner sleeve and an eccentric outer sleeve which are matched with each other, and the chemical anchor bolts penetrate through the eccentric inner sleeve and the eccentric outer sleeve to realize that all the chemical anchor bolts are stressed simultaneously.
The further optimization scheme is that the tensioning top plate is of a T-shaped structure, bosses are arranged on the inner sides of two sides of the tensioning top plate, and grooves used for being buckled with the bosses on the tensioning top plate are formed in the front end and the upper end of the tensioning end clamp cover plate.
The further optimization scheme is that square slotted holes are formed in the front ends of the two sides of the tensioning end fixing plate, and square tensioning nuts which are convenient to disassemble and assemble and used for fixing the tensioning screws are installed in the square slotted holes.
The further optimization scheme is that fixing plate bosses for constructing a male concave-male groove and a female concave-male groove are arranged on the two inner sides of the fixing end fixing plate; bottom plate bosses for constructing a male concave-male groove and a female concave-male groove are arranged on the two outer sides of the bottom plate of the fixed end clamp; cover plate bosses for constructing a male concave groove and a female concave groove are arranged on the two outer sides of the fixed end clamp cover plate; the fixed end fixing plate is buckled with the fixed end clamp bottom plate and the fixed end clamp cover plate through the male and female concave grooves to realize self-locking of the fixed end clamp and the fixed end fixing plate.
The further optimization scheme is that screw holes are correspondingly formed in the two sides of the tensioning end clamp bottom plate and the tensioning end clamp cover plate, the tensioning end clamp bottom plate and the tensioning end clamp cover plate are fixed together through screw hole mounting screws, screw holes are correspondingly formed in the two sides of the fixed end clamp bottom plate and the fixed end clamp cover plate, and the fixed end clamp bottom plate and the fixed end clamp cover plate are fixed together through the screw hole mounting screws.
The further optimization scheme is that the eccentric inner sleeve comprises an inner sleeve body with an axial first screw rod through hole and a gasket arranged on the upper circumferential part of the inner sleeve body, and the circle center of the first screw rod channel deviates from the circle center of the gasket; the eccentric outer sleeve comprises an outer tube sleeve body with an axial second screw rod through hole and an adjusting gasket arranged on the upper portion of the outer tube sleeve body in the circumferential direction, a screw rod hole is formed in the adjusting gasket, a supporting platform for mounting the eccentric inner sleeve is radially arranged at the upper end of the outer tube sleeve body, the circle center of the screw rod hole deviates from the central point of the adjusting gasket, and the central axis of the second screw rod through hole deviates from the central axis of the outer tube sleeve body; the inner pipe sleeve body is sleeved in the second screw rod through hole of the outer pipe sleeve body, and the relative position of the eccentric outer sleeve and the eccentric inner sleeve is adjusted by rotating the eccentric outer sleeve and the eccentric inner sleeve so as to realize the transverse and longitudinal adjustment of the fixture mounting hole.
Compare prior art, the utility model has the advantages of it is following: the carbon fiber plate reverse tensioning prestressed anchorage device of the utility model not only ensures that the reinforced concrete member receives stress uniformly, but also maximizes the length range of the applied stress; the concrete surface is not required to be grooved, so that the distance between the carbon plate and the concrete surface can be minimized, and the secondary damage to a concrete member is avoided; the prestress anchorage device system after each accessory combination is ensured not to generate insufficient clamping force for causing the carbon fiber plate to penetrate out when the limit stress failure value of the carbon fiber plate is reached; the risk of uneven stress of the anchor bolt, which causes shearing or prying damage of the anchor bolt, can not be generated.
(1) The utility model discloses a reverse stretch-draw mode, the operation space is little reserved at the ground tackle both ends, and the length scope of exerting stress reaches the maximize to the concrete member.
(2) The utility model discloses an anchor clamps centre gripping carbon fiber plate need not to slot to the concrete, avoids causing the secondary destruction of concrete substrate, can realize that carbon fiber plate is from concrete surface 3-5mm, reaches the distance of ideal.
(3) The utility model discloses a chemistry crab-bolt and waist type hole cooperation installation when boring chemistry crab-bolt hole on the concrete member and meetting the reinforcing bar, can suitably shift and avoid destroying the reinforcing bar in the substrate.
(4) The utility model discloses the fixed plate and the stiff end anchor clamps of stiff end adopt auto-lock structure, easy operation and firm.
(5) The utility model discloses a stretch-draw frock cooperation stretch-draw, easy operation, simple to operate, and stretch-draw frock reuse, reduce the cost.
(6) The utility model discloses the chemistry crab-bolt of every fixed point all is furnished with eccentric adjusting collar, realizes ground tackle both ends coaxial line through rotatory eccentric adjusting collar, has realized simultaneously that all crab-bolts of same component receive the shear force simultaneously, and the shear force is unanimous basically.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 2 is a schematic view of the structure of the tension end fixing plate of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 3 is a schematic diagram of the structure of the bottom plate of the tension end clamp of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 4 is a schematic diagram of the cover plate structure of the tension end clamp of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 5 is a schematic view of the fixed end fixing plate structure of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 6 is a schematic diagram of the bottom plate structure of the fixed end clamp of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 7 is a schematic diagram of the fixed end clamp cover plate structure of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 8 is a schematic diagram of a structure of a top plate of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 9 is a schematic diagram of the structure of the eccentric inner sleeve of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 10 is a schematic view of the eccentric outer sleeve structure of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 11 is a schematic diagram of a square stretch-draw nut of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
Fig. 12 is a schematic structural view of a tension thrust plate of the carbon fiber plate reverse tension prestressed anchorage device of the present invention.
The symbols in the drawings illustrate that: 1. the tensioning device comprises a tensioning end tensioning assembly, 1-1, a tensioning end fixing plate, 1-1-1, a square groove hole, 1-2, a tensioning end clamp, 1-2-1, a tensioning end clamp bottom plate, 1-2-2, a tensioning end clamp cover plate, 1-2-3 and a fixing screw rod; 2. the device comprises a fixed end fixing assembly, 2-1 parts of a fixed end fixing plate, 2-1-1 parts of a fixing plate boss, 2-2 parts of a fixed end clamp, 2-2-1 parts of a fixed end clamp bottom plate, 2-2-1-1 parts of a bottom plate boss, 2-2-2 parts of a fixed end clamp cover plate, 2-2-2-1 parts of a cover plate boss, 3 parts of a tensioning tool, 3-1 parts of a tensioning screw rod, 3-2 parts of a tensioning thrust plate, 3-3 parts of a tensioning top plate; 4. a chemical anchor bolt; 5. a kidney-shaped hole 6, an eccentric inner sleeve 6-1, an inner pipe sleeve body 6-2 and a gasket; 7. 7-1 parts of an eccentric outer sleeve, 7-2 parts of an outer pipe sleeve body, 7-3 parts of an adjusting gasket, 7-4 parts of a screw hole and a supporting platform; 8. a square tensioning nut; 9. a hexagon socket head cap screw; 10. and a nut.
Detailed Description
The specific embodiment is as follows:
referring to fig. 1 to 12, a carbon fiber plate reverse tension prestressed anchorage device includes a tension end tension assembly 1 and a fixed end fixing assembly 2 fixedly installed on concrete for clamping and tensioning a carbon fiber plate, and a tension tool 3 for assisting in tensioning the carbon fiber plate; the tensioning end tensioning assembly 1 comprises a tensioning end fixing plate 1-1 fixedly mounted on concrete and a tensioning end clamp 1-2 used for clamping a carbon fiber plate, wherein the tensioning end clamp 1-2 is mounted on the tensioning end fixing plate 1-1; two sides of the tensioning end fixing plate 1-1 are respectively provided with 4 waist-shaped holes 5, and the chemical anchor bolts 4 penetrate through the waist-shaped holes 5 and are fixed on concrete. An eccentric inner sleeve 6 and an eccentric outer sleeve 7 which are matched with each other are arranged in the kidney-shaped hole 5, and the chemical anchor bolts 4 penetrate through the eccentric inner sleeve 6 and the eccentric outer sleeve 7 so as to realize the simultaneous stress of all the chemical anchor bolts and the adjustment of two ends of the anchor on the same central axis. The tensioning end clamp 1-2 comprises a tensioning end clamp bottom plate 1-2-1 and a tensioning end clamp cover plate 1-2-2 which are buckled with each other, and a corrugated chute for placing a carbon fiber plate is vertically arranged in the middle of the tensioning end clamp bottom plate 1-2-1; the corrugated boss for compressing the carbon fiber plate is correspondingly arranged in the middle of the tension end clamp cover plate 1-2-2; a fixed screw 1-2-3 is arranged on the tensioning end clamp cover plate 1-2-2, and the other end of the fixed screw 1-2-3 is fixedly arranged on the tensioning end fixed plate 1-1 and locked by a nut after tensioning is finished; carbon fiber plate glue is evenly coated on the corrugated chute of the bottom plate 1-2-1 of the tensioning end clamp and the corrugated boss of the cover plate 1-2-2 of the tensioning end clamp, one end of a carbon fiber (not shown) plate is placed into the chute, the cover plate of the tensioning end clamp is covered, and the clamping is locked by an inner hexagonal screw 9.
The fixed end fixing component 2 comprises a fixed end fixing plate 2-1 fixedly arranged on concrete and a fixed end clamp 2-2 used for clamping the carbon fiber plate, wherein the fixed end clamp 2-2 is fixed by mutual complementation and occlusion of the male and female concave-convex grooves on the two outer sides and the male and female concave-convex grooves on the two inner sides of the fixed end fixing plate 2-1; fixing plate bosses 2-1-1 for building male and female concave grooves are arranged on the two inner sides of the fixed end fixing plate 2-1; two sides of the fixed end fixing plate 2-1 are respectively provided with 4 waist-shaped holes 5, and the chemical anchor bolts 4 penetrate through the waist-shaped holes 5 and are fixed on concrete. An eccentric inner sleeve 6 and an eccentric outer sleeve 7 which are matched with each other are arranged in the kidney-shaped hole 5, and the chemical anchor bolts 4 penetrate through the eccentric inner sleeve 6 and the eccentric outer sleeve 7 so as to realize the simultaneous stress of all the chemical anchor bolts and the adjustment of two ends of the anchor on the same central axis. The fixed end clamp 2-2 comprises a fixed end clamp bottom plate 2-2-1 and a fixed end clamp cover plate 2-2-2 which are buckled together, wherein a corrugated chute for placing a carbon fiber plate is vertically arranged in the middle of the fixed end clamp bottom plate 2-2-1, and bottom plate bosses 2-2-1-1 for building male and female concave grooves are arranged on the two outer sides of the corrugated chute; the middle part of the fixed end clamp cover plate 2-2-2 is correspondingly provided with an anti-slip corrugated boss when the carbon fiber plate is pressed, and the two outer sides are provided with cover plate bosses 2-2-2-1 for building male and female concave grooves; carbon fiber plate glue is evenly smeared on the corrugated chute of the fixed end clamp bottom plate 2-2-1 and the corrugated boss of the fixed end clamp cover plate 2-2-2, the other end of the carbon fiber plate is placed into the chute, and the fixed end clamp cover plate is covered and locked by the hexagon socket head cap screw 9. The fixed end fixing plate 2-1, the fixed end clamp bottom plate 2-2-1 and the fixed end clamp cover plate 2-2-2 are buckled through a male-female concave groove to realize self-locking of the fixed end clamp 2-2 and the fixed end fixing plate 2-1.
The tensioning tool 3 comprises a tensioning screw 3-1, a tensioning thrust plate 3-2 and a tensioning top plate 3-3; one end of a tensioning screw rod 3-1 is connected with a square tensioning nut 8 in a tensioning end fixing plate 1-1, a tensioning thrust plate 3-2 is installed at the other end of the tensioning screw rod 3-1, a tensioning top plate 3-3 is installed at the front end of a tensioning end clamp 1-2, and a jack is arranged between the tensioning thrust plate 3-2 and the tensioning top plate 3-3 to push the tensioning end clamp 1-2 to realize reverse tensioning of the carbon fiber plate. The tensioning top plate 3-3 is of a T-shaped structure, bosses are arranged on the inner sides of two sides of the tensioning top plate, and grooves used for being buckled with the bosses on the tensioning top plate 3-3 are arranged at the front end and the upper end of the tensioning end clamp cover plate 1-2-2. The front ends of two sides of the tensioning end fixing plate 1-1 are provided with square slotted holes 1-1-1, square tensioning nuts 8 which are convenient to disassemble and assemble and used for fixing the tensioning screws 3-1 are installed in the square slotted holes 1-1-1, and the tensioning screws 3-1 are locked by the nuts 10 after installation.
As shown in FIGS. 3-7, screw holes are correspondingly formed on both sides of the tensioning end clamp base plate 1-2-1 and the tensioning end clamp cover plate 1-2-2, screw hole mounting screws are used for fixing the tensioning end clamp base plate 1-2-1 and the tensioning end clamp cover plate 1-2-2 together, screw holes are correspondingly formed on both sides of the fixed end clamp base plate 2-2-1 and the fixed end clamp cover plate 2-2-2, and screw hole mounting screws are used for fixing the fixed end clamp base plate 2-2-1 and the fixed end clamp cover plate 2-2-2 together.
As shown in fig. 9 and 10, the eccentric inner sleeve 6 includes an inner sleeve body 6-1 having an axial first screw through hole and a gasket 6-2 disposed circumferentially at an upper portion of the inner sleeve body 6-1, and a center of the first screw channel deviates from a center of the gasket 6-2; the eccentric outer sleeve 7 comprises an outer tube sleeve body 7-1 with an axial second screw rod through hole and an adjusting gasket 7-2 arranged on the upper portion of the outer tube sleeve body 7-1 in the circumferential direction, a screw rod hole 7-3 is formed in the adjusting gasket 7-2, a supporting platform 7-4 for installing the eccentric inner sleeve 6 is radially arranged at the upper end of the outer tube sleeve body 7-1, the circle center of the screw rod hole 7-3 deviates from the central point of the adjusting gasket 7-2, and the central axis of the second screw rod through hole deviates from the central axis of the outer tube sleeve body 7-1; the inner pipe sleeve body 6-1 is sleeved into the second screw rod through hole of the outer pipe sleeve body 7-1, and the relative position of the eccentric outer sleeve 7 and the eccentric inner sleeve 6 is adjusted by rotating to realize the adjustment of the fixture mounting hole in any direction. The inner tube sleeve body 6-1 and the gasket 6-2 of the utility model are integrally formed; the outer tube sleeve body 7-1 and the adjusting gasket 7-2 are integrally formed. The shape of the adjusting shim 7-2 is one of a triangle, a polygon and a circle, wherein a hexagon is preferred. The utility model discloses a set up first screw rod through-hole and second screw rod through-hole in the position of skew center, adjust its relative position in order to realize arbitrary orientation regulation fixture mounting hole through rotatory eccentric overcoat 7 and eccentric endotheca 6 to the installation problem when the screw rod of solution crab-bolt and mounting hole decentraction, and do when component or equipment receive the crab-bolt anchor three or more, let all crab-bolts can the equilibrium receive the scissors, guaranteed the stability of installation.
The specific implementation manner of the utility model is as follows: the utility model discloses the mounting method of the reverse stretch-draw prestressed anchorage utensil of carbon fiber plate is as follows:
(1) firstly, determining the position of an anchorage device and the length of a carbon fiber plate, and fixing a fixed end fixing plate 2-1 and a tensioning end fixing plate 1-1 on concrete by using a chemical anchor bolt 4 respectively; each chemical anchor bolt 4 is fixed and adjusted by an eccentric inner sleeve 6, an eccentric outer sleeve 7 and a screw cap.
(2) Then uniformly coating carbon fiber plate glue on an inner boss of a corrugated chute of the tensioning end clamp bottom plate 1-2-1 and a corrugated boss of the tensioning end clamp cover plate 1-2-2, putting one end of a carbon fiber plate into the chute, covering the tensioning end clamp cover plate, and locking by using screws; carbon fiber plate glue is evenly smeared on a boss in the corrugated chute of the fixed end clamp bottom plate 2-2-1 and a corrugated boss of the fixed end clamp cover plate 2-2-2, the other end of the carbon fiber plate is placed into the chute, and the fixed end clamp cover plate is covered and locked by screws.
(3) And placing the assembled tensioning end clamp 1-2 into a tensioning end fixing plate 1-1, installing a fixing screw 1-2-3 on a tensioning end clamp cover plate 1-2-2, and placing the fixing end clamp 2-2 into a fixing end fixing plate 2-1 for locking.
(4) One end of a tensioning screw rod 3-1 is installed on a tensioning end fixing plate 1-1 through a square tensioning nut 8, a tensioning thrust plate 3-2 is installed at the other end of the tensioning screw rod 3-1 and fixed through a nut, a tensioning top plate 3-3 is installed at the front end of a tensioning end clamp 1-2, a jack is placed between the tensioning thrust plate 3-2 and the tensioning top plate 3-3 to push the tensioning end clamp 1-2 to realize reverse tensioning of the carbon fiber plate, and the nut at one end of the fixing screw rod 1-2-3 is locked on the tensioning end fixing plate 1-1 after tensioning to a set value.
(5) And (4) removing the jack and the tensioning tool 3. And removing redundant carbon fiber plate glue, installing a carbon fiber plate pressing strip and coating an anticorrosive coating.
The utility model discloses the reverse stretch-draw prestressed anchorage utensil of carbon fiber plate's operation process as follows:
1. and (6) positioning and paying off. And (5) accurately releasing the position to be polished according to a drawing, and popping out the line by using an ink fountain. It is proposed to eject the beam body centerline first.
2. Polishing: removing oxide layer and oil stain on the surface of the concrete, and surface decoration.
3. And (5) repairing and leveling. And leveling the uneven place by using leveling glue, and polishing to ensure that the surface is smooth, clean and free of dust so as to ensure that the anchorage device is installed more smoothly.
4. The fixed plate of tensioning end and the fixed plate of stiff end are installed to the bridge bottom surface with the crab-bolt, and usable eccentric adjusting collar adjusts the skew of crab-bolt when installing the fixed plate, guarantees that all crab-bolts reach the atress simultaneously.
5. Pre-tensioning:
(1) the drawing instrument is arranged on a support at the stretching end, and a hollow steel pipe or a steel bar penetrates through the drawing instrument in the middle to prevent the drawing instrument from falling off, so that the safety protection effect is realized;
(2) and when the pre-tensioning is carried out to 20-25KN, after the tensioning is stopped, checking whether each fastener is safe and reliable.
(3) After the inspection is finished, after the nuts of the two end fixing supports are locked, the unloading pulling force begins to paint the carbon plate glue, and the thickness of the glue can be increased according to the distance between the concrete base material surface and the carbon fiber plate.
After the gluing is finished, the carbon fiber plate is stretched step by step, and the next step is stretched after 3-5 minutes of interval of every step. And after tensioning is finished, wiping off redundant carbon plate glue overflowing from two sides of the carbon fiber plate, properly locking the pressing plate, and removing the drawing instrument and the tensioning tool.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a carbon fiber plate reversal stretch-draw prestressed anchorage utensil which characterized in that: the device comprises a stretching end stretching component (1) and a fixed end fixing component (2) which are fixedly arranged on concrete and used for clamping and stretching a carbon fiber plate, and a stretching tool (3) for assisting in stretching the carbon fiber plate;
the tensioning end tensioning assembly (1) comprises a tensioning end fixing plate (1-1) fixedly mounted on concrete and a tensioning end clamp (1-2) used for clamping a carbon fiber plate, wherein the tensioning end clamp (1-2) is mounted on the tensioning end fixing plate (1-1); the tensioning end clamp (1-2) comprises a tensioning end clamp bottom plate (1-2-1) and a tensioning end clamp cover plate (1-2-2) which are buckled with each other, and a corrugated chute for placing a carbon fiber plate is vertically arranged in the middle of the tensioning end clamp bottom plate (1-2-1); the corrugated boss for compressing the carbon fiber plate is correspondingly arranged in the middle of the tension end clamp cover plate (1-2-2); a fixed screw (1-2-3) is arranged on the tensioning end clamp cover plate (1-2-2), and the other end of the fixed screw (1-2-3) is fixedly arranged on the tensioning end fixing plate (1-1) after tensioning is finished;
the fixed end fixing component (2) comprises a fixed end fixing plate (2-1) fixedly arranged on concrete and a fixed end clamp (2-2) used for clamping the carbon fiber plate, wherein the fixed end clamp (2-2) is occluded and fixed through a male-female concave-convex groove formed in two outer sides of the fixed end fixing plate and a male-female concave groove formed in two inner sides of the fixed end fixing plate (2-1); the fixed end clamp (2-2) comprises a fixed end clamp bottom plate (2-2-1) and a fixed end clamp cover plate (2-2-2) which are buckled together, a corrugated chute for placing the carbon fiber plate is vertically arranged in the middle of the fixed end clamp bottom plate (2-2-1), and a corrugated boss which is prevented from sliding when the carbon fiber plate is compressed is correspondingly arranged in the middle of the fixed end clamp cover plate (2-2-2);
the tensioning tool (3) comprises a tensioning screw (3-1), a tensioning thrust plate (3-2) and a tensioning top plate (3-3); one end of a tensioning screw rod (3-1) is connected with a tensioning end fixing plate (1-1) in an installing mode, the other end of the tensioning screw rod (3-1) is connected with a tensioning thrust plate (3-2) in an installing mode, a tensioning top plate (3-3) is installed at the front end of a tensioning end clamp (1-2), and a jack is placed between the tensioning thrust plate (3-2) and the tensioning top plate (3-3) to push the tensioning end clamp (1-2) to achieve reverse tensioning of the carbon fiber plate.
2. The carbon fiber plate reverse tension prestressed anchorage of claim 1, characterized in that: the stretching end fixing plate (1-1) and the fixed end fixing plate (2-1) are fixed on concrete through chemical anchor bolts (4), waist-shaped holes (5) are formed in the stretching end fixing plate (1-1) and the fixed end fixing plate (2-1), and the chemical anchor bolts (4) penetrate through the waist-shaped holes (5) and are fixed on the concrete.
3. The carbon fiber plate reverse tension prestressed anchorage of claim 2, characterized in that: be equipped with eccentric endotheca (6) and eccentric overcoat (7) of mutually supporting in waist type hole (5), chemical crab-bolt (4) pass eccentric endotheca (6) and eccentric overcoat (7) in order to realize all chemical crab-bolts atress simultaneously.
4. The carbon fiber plate reverse tension prestressed anchorage of claim 1 or 3, characterized in that: the tensioning top plate (3-3) is of a T-shaped structure, bosses are arranged on the inner sides of two sides of the tensioning top plate, and grooves used for being buckled with the bosses on the tensioning top plate (3-3) are formed in the front end and the upper end of the tensioning end clamp cover plate (1-2-2).
5. The carbon fiber plate reverse tension prestressed anchorage of claim 1, characterized in that: the front ends of two sides of the tensioning end fixing plate (1-1) are provided with square slotted holes, and square tensioning nuts (8) which are convenient to disassemble and assemble and used for fixing the tensioning screws (3-1) are installed in the square slotted holes.
6. The carbon fiber plate reverse tension prestressed anchorage of claim 1, characterized in that: fixing plate bosses (2-1-1) for building male and female concave-convex grooves are arranged on the two inner sides of the fixed end fixing plate (2-1); bottom plate bosses (2-2-1-1) for building the male and female concave-convex grooves are arranged on the two outer sides of the fixed end clamp bottom plate (2-2-1); cover plate bosses (2-2-2-1) for building the male and female concave-convex grooves are arranged on the two outer sides of the fixed end clamp cover plate (2-2-2); the fixed end fixing plate (2-1), the fixed end clamp bottom plate (2-2-1) and the fixed end clamp cover plate (2-2-2) are buckled through a male-female concave groove to realize self-locking of the fixed end clamp (2-2) and the fixed end fixing plate (2-1).
7. The carbon fiber plate reverse tension prestressed anchorage of claim 1 or 6, wherein: screw holes are correspondingly formed in the two sides of the tensioning end clamp base plate (1-2-1) and the tensioning end clamp cover plate (1-2-2), the tensioning end clamp base plate (1-2-1) and the tensioning end clamp cover plate (1-2-2) are fixed together through screw hole mounting screws, screw holes are correspondingly formed in the two sides of the fixed end clamp base plate (2-2-1) and the fixed end clamp cover plate (2-2-2), and the fixed end clamp base plate (2-2-1) and the fixed end clamp cover plate (2-2-2) are fixed together through screw hole mounting screws.
8. The carbon fiber plate reverse tension prestressed anchorage of claim 3, characterized in that: the eccentric inner sleeve (6) comprises an inner tube sleeve body (6-1) with an axial first screw rod through hole and a gasket (6-2) arranged on the upper circumferential direction of the inner tube sleeve body (6-1), and the circle center of the first screw rod channel deviates from the circle center of the gasket (6-2); the eccentric outer sleeve (7) comprises an outer tube sleeve body (7-1) with an axial second screw rod through hole and an adjusting gasket (7-2) arranged on the upper portion of the outer tube sleeve body (7-1) in the circumferential direction, a screw rod hole (7-3) is formed in the adjusting gasket (7-2), a supporting platform (7-4) for mounting the eccentric inner sleeve (6) is radially arranged at the upper end of the outer tube sleeve body (7-1), the circle center of the screw rod hole (7-3) deviates from the central point of the adjusting gasket (7-2), and the central axis of the second screw rod through hole deviates from the central axis of the outer tube sleeve body (7-1); the inner pipe sleeve body (6-1) is sleeved in a second screw rod through hole of the outer pipe sleeve body (7-1), and the relative position of the eccentric outer sleeve (7) and the eccentric inner sleeve (6) is adjusted by rotating to realize the transverse and longitudinal adjustment of the fixture mounting hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920460492.0U CN209907233U (en) | 2019-04-04 | 2019-04-04 | Carbon fiber plate reverse tension prestressed anchorage |
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| CN201920460492.0U CN209907233U (en) | 2019-04-04 | 2019-04-04 | Carbon fiber plate reverse tension prestressed anchorage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881591A (en) * | 2019-04-04 | 2019-06-14 | 徐慧云 | The reversed stretch-draw prestressing force anchorage of carbon fiber board |
| CN111472286A (en) * | 2020-04-23 | 2020-07-31 | 中交路桥建设有限公司 | Suspension type anchor pulling device and application construction method thereof |
| CN117449608A (en) * | 2023-12-26 | 2024-01-26 | 福建理工大学 | A self-leveling carbon fiber board prestressing force tensioning equipment for cambered surface structure |
-
2019
- 2019-04-04 CN CN201920460492.0U patent/CN209907233U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881591A (en) * | 2019-04-04 | 2019-06-14 | 徐慧云 | The reversed stretch-draw prestressing force anchorage of carbon fiber board |
| CN111472286A (en) * | 2020-04-23 | 2020-07-31 | 中交路桥建设有限公司 | Suspension type anchor pulling device and application construction method thereof |
| CN117449608A (en) * | 2023-12-26 | 2024-01-26 | 福建理工大学 | A self-leveling carbon fiber board prestressing force tensioning equipment for cambered surface structure |
| CN117449608B (en) * | 2023-12-26 | 2024-03-12 | 福建理工大学 | A self-leveling carbon fiber board prestressing force tensioning equipment for cambered surface structure |
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Effective date of registration: 20210412 Address after: 210017 room e08-2-2708, Suning Huigu, 268 Jiqingmen street, Gulou District, Nanjing City, Jiangsu Province Patentee after: Nanjing Mankate science and Technology Co.,Ltd. Address before: Room 1401, unit 1, building 4, 128 Jiangdong Middle Road, Jianye District, Nanjing City, Jiangsu Province, 210000 Patentee before: Xu Huiyun |