CN114991516B - Combined reinforcing device and method for realizing prestress self-tensioning and secondary regulation - Google Patents
Combined reinforcing device and method for realizing prestress self-tensioning and secondary regulation Download PDFInfo
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- CN114991516B CN114991516B CN202210607503.XA CN202210607503A CN114991516B CN 114991516 B CN114991516 B CN 114991516B CN 202210607503 A CN202210607503 A CN 202210607503A CN 114991516 B CN114991516 B CN 114991516B
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention is suitable for the technical field of concrete structure reinforcement, and relates to a combined reinforcement device and a method for realizing prestress self-tensioning and secondary regulation, wherein the combined reinforcement device comprises the following steps: the tensioning assembly, the adjusting assembly and the prestressed tendon assembly; the tensioning assembly comprises a first sliding rail, a connecting rod, a first inclined rod and a second inclined rod, wherein both ends of the connecting rod are respectively provided with a first sliding block, the first sliding blocks are arranged on the first sliding rail and are in cross hinge connection with the second inclined rod, one ends of the first inclined rod and one end of the second inclined rod are respectively hinged with the connecting rod, and the other ends of the first inclined rod and the second inclined rod are respectively hinged with the second sliding blocks; the adjusting component comprises a second sliding rail, a second sliding block and an adjusting rod, and the adjusting rod penetrates through one second sliding block and is fixedly connected with the other second sliding block; the prestressed tendon assembly comprises an anchor and prestressed tendons, wherein the anchor is arranged on the connecting rod, and the prestressed tendons sequentially pass through the connecting rod at one side, the pore canal of the second sliding rail and finally are anchored on the anchor on the connecting rod at the other side through the anchor. The self-tensioning and secondary regulation of the prestressed tendons can be realized through the self-assembly, external tensioning equipment is not needed, and the advantages of two reinforcement modes of truss and external prestressing are exerted.
Description
Technical Field
The invention belongs to the technical field of concrete structure reinforcement, and particularly relates to a combined reinforcement device and method for realizing prestress self-tensioning and secondary regulation.
Background
Due to erosion of harmful substances in the external environment, aging of concrete, cracking, overload, improvement of design standards, and the like, various damages to the concrete structure operated for years can occur. Over time, structural damage is continuously accumulated, and the problems of insufficient bearing capacity, rigidity and the like of the concrete bridge occur in the service period. In order to ensure the safety and normal use of the structure, the damaged concrete structure needs to be reinforced.
At present, the concrete structure reinforcement method mainly comprises the methods of steel plate reinforcement, fiber composite material adhesion reinforcement, external prestress reinforcement, section reinforcement increase and the like. The single reinforcement method has poor reinforcement effect due to the problems of material performance, structural dead weight and the like. In recent years, the combined reinforcement concept provides a new idea for reinforcing a concrete structure, the combined reinforcement can fully exert the advantages of a plurality of reinforcement methods, and is gradually applied to the field of reinforcing the concrete structure, for example, if a bridge structure separate type steel-concrete combined truss reinforcement method is invented by a person, and in addition, an assembled prestress truss for reinforcement and a construction method thereof are proposed by a person, but the combined reinforcement device needs to use an external tensioning device when prestress tensioning is carried out, and meanwhile, secondary regulation and control are difficult to realize after prestress is lost or relaxed.
Therefore, how to provide a combined reinforcing device capable of realizing self-tensioning of prestress and secondary regulation of prestress tendons without an external tensioning device is a problem to be solved by the person skilled in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a combined reinforcing device for realizing self-tensioning and regulation of prestressing force, so as to solve the problem that the prior art cannot realize self-tensioning of prestressing force and the problem that the reinforcing efficiency is low due to secondary regulation of prestressing force; in addition, the invention also provides a combined reinforcement method for realizing the self-tensioning and secondary regulation of the prestress.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a combined reinforcement device for implementing self-tensioning and secondary regulation of prestressing force, comprising: the device comprises a tensioning assembly, an adjusting assembly and a prestressed tendon assembly, wherein the tensioning assembly is in driving connection with the adjusting assembly and is fixed on a concrete structure, and the prestressed tendon assembly is fixed on the tensioning assembly; the tensioning assembly comprises two first sliding rails which are arranged in parallel, a connecting rod which connects the two first sliding rails, a first inclined rod and a second inclined rod, wherein first sliding blocks are arranged at two ends of the connecting rod, and the first sliding blocks are arranged on the first sliding rails; the adjusting assembly comprises a second sliding rail, two second sliding blocks and an adjusting rod, wherein the second sliding rail is perpendicular to the first sliding rail, the two second sliding blocks are arranged on the second sliding rail, the adjusting rod penetrates through one second sliding block and is fixedly connected with the other second sliding block, the first inclined rod is hinged with the second inclined rod in a crossing manner, one end of each of the first inclined rod and the second inclined rod is hinged with the connecting rod, and the other end of each of the first inclined rod and the second inclined rod is hinged with the second sliding block; the prestress rib assembly comprises an anchor and prestress ribs, the anchor is arranged on the connecting rods, and the prestress ribs sequentially pass through the connecting rods on one side, the pore canal of the second sliding rail and the anchor finally anchored on the connecting rods on the other side through the anchor;
the adjusting assembly further comprises third sliding blocks, supporting rods and third inclined rods, each second sliding block is connected with one third sliding block through one supporting rod, and each first sliding block is connected with the third sliding block through one third inclined rod.
Further, the connecting rod comprises a supporting part and a working part, wherein the supporting part is fixed on the concrete structure, and the working part is arranged on the surface of the supporting part.
Further, the first sliding rail, the second sliding rail and the supporting part of the connecting rod are respectively provided with a strip hole for facilitating the movement of the first inclined rod, the second inclined rod and the third inclined rod.
Further, the operation part is provided with a bending part which is convenient for the anchoring of the prestressed tendons.
Further, the bending part is also provided with a through hole for the prestressed tendon to pass through.
Furthermore, the through hole of the operation part is also provided with a stiffening rib for guaranteeing the strength of the operation part.
Further, the supporting part is provided with a fixing hole for fixing.
Further, the prestress rib assembly further comprises a steering block which is symmetrical to the second sliding rail and fixed on the concrete structure, and a groove for keeping the prestress rib is formed in a partially concave mode.
In a second aspect, the present invention also provides a method applied to the above device, including the following steps:
s10, fixing two parallel first sliding rails on a concrete structure, and arranging first sliding blocks in the two first sliding rails, wherein the corresponding first sliding blocks in the two first sliding rails are connected through connecting rods;
s20, fixing a second sliding rail on a concrete structure and perpendicular to the first sliding rail, and loading two second sliding blocks and two third sliding blocks in the second sliding rail, wherein the second sliding blocks and the third sliding blocks are connected one by one through supporting rods, and the adjusting rods penetrate through pore channels of the two third sliding blocks and connect one end of each of the adjusting rods with one third sliding block through nuts;
s30, a first inclined rod and a second inclined rod are hinged in a crossed mode, one end of each of the first inclined rod and the second inclined rod is hinged to the connecting rod, the other end of each of the first inclined rod and the second inclined rod is hinged to the third sliding block, and two ends of the third inclined rod are respectively hinged to the first sliding block and the second sliding block;
s40, firstly anchoring one end of the prestressed tendon on one side of the connecting rod, sequentially passing through a through hole on the connecting rod, a steering block on one side, the second sliding rail and the steering block on the other side, and finally anchoring the other end of the prestressed tendon on the connecting rod on the other side;
s50, rotating the adjusting rods, under the action of the first inclined rods and the second inclined rods, the two connecting rods move away from one side of the second sliding rail, the prestressed tendons are stretched, and when the specified prestress is reached, the rotating of the adjusting rods is stopped, the connecting rods are fixed through bolts, so that stretching of the prestressed tendons is completed.
And S60, when the reinforcing device works together with the concrete structure for a period of time and prestress loss is caused by the phenomena of loosening of the prestress rib and the like, the fixing bolt is released, and the step S50 is repeated, so that secondary regulation and control of the prestress rib can be completed.
Compared with the prior art, the combined reinforcing device and method for realizing the self-tensioning and secondary regulation of the prestress have the following beneficial effects:
the truss system formed by the tensioning assembly and the adjusting assembly has the advantages that the structural rigidity can be effectively increased, the bearing capacity and the crack resistance of the structure are improved, the self-tensioning of prestress is realized, the tensioning assembly effectively guarantees the stability of prestress tensioning, meanwhile, the prestress tensioning is completed and fixed to form a stressed framework, the tensioning assembly, the adjusting assembly and the prestress rib assembly jointly act to realize the combined reinforcement of a concrete structure, the whole tensioning process does not need external tensioning equipment, the tensioning and secondary regulation of the prestress rib can be realized through the adjusting rod, the reinforcement efficiency of the whole device is greatly improved, the advantages of the truss system and the combined reinforcement mode of external prestress tensioning are fully exerted, and the truss system can be widely applied to the field of reinforcement of concrete structures.
Drawings
In order to more clearly illustrate the solution of the invention, a brief description will be given below of the drawings required for the description of the embodiments, it being apparent that the drawings in the following description are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top view of a combined reinforcement device for realizing prestressing self-tensioning and secondary regulation according to an embodiment of the present invention;
FIG. 2 is a top view of a portion of a tensioning assembly of a combined reinforcement device for achieving self-tensioning and secondary regulation of prestressing force according to an embodiment of the present invention;
FIG. 3 is a side view of a portion of a tensioning assembly of a combined reinforcement device for achieving self-tensioning and secondary regulation of prestressing force according to an embodiment of the present invention;
FIG. 4 is a side view of a portion of a tuning assembly of a combined reinforcement device for achieving self-tensioning and secondary tuning of prestressing force according to an embodiment of the present invention;
FIG. 5 is a top view of a portion of a regulating assembly of a combined reinforcement device for achieving self-tensioning and secondary regulation of prestressing force according to an embodiment of the present invention;
FIG. 6 is a side view of a diverter block of a tendon assembly for a combined reinforcement for self-tensioning and secondary steering of a tendon assembly in accordance with an embodiment of the present invention;
FIG. 7 is a flow chart of a combined reinforcement method for realizing prestress self-tensioning and secondary regulation according to an embodiment of the invention;
reference numerals: 10-stretching assembly; 101-a first slide rail; 102-connecting rods; 1021-a support; 1022-working section; 1023-through holes; 1024-stiffeners; 1025-fixing holes; 103-a first slider; 104-a first diagonal; 105-a second diagonal; 106-elongated holes; 20-an adjustment assembly; 201-a second slide rail; 202-a second slider; 203-adjusting the rod; 204-a third slider; 205-supporting rods; 206-a third diagonal; 30-a prestressed reinforcement assembly; 301-an anchor; 302-prestress rib; 303-steering block; 3031-groove; 40-concrete structure.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terms used in the specification are used herein for the purpose of describing particular embodiments only and are not intended to limit the present invention, for example, the orientations or positions indicated by the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientations or positions based on the drawings, which are merely for convenience of description and are not to be construed as limiting the present invention.
The terms "comprising" and "having" and any variations thereof in the description of the invention and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion; the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. In the description of the invention and the claims and the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
Furthermore, references herein to "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention provides a combined reinforcing device for realizing prestress self-tensioning and secondary regulation, which is used for reinforcing a concrete bridge, and comprises the following components: the device comprises a tensioning assembly, an adjusting assembly and a prestressed reinforcement assembly, wherein the tensioning assembly is in driving connection with the adjusting assembly and is fixed on a concrete structure; the tensioning assembly comprises two first sliding rails which are arranged in parallel, a connecting rod which connects the two first sliding rails, a first inclined rod and a second inclined rod, wherein first sliding blocks are arranged at two ends of the connecting rod, and the first sliding blocks are arranged on the first sliding rails; the adjusting component comprises a second sliding rail, two second sliding blocks and an adjusting rod, wherein the second sliding rail is perpendicular to the first sliding rail, the two second sliding blocks are arranged on the second sliding rail, the adjusting rod penetrates through one second sliding block and is fixedly connected with the other second sliding block, the first inclined rod is hinged with the second inclined rod in a crossing way, one end of each of the first inclined rod and the second inclined rod is hinged with the connecting rod, and the other end of each of the first inclined rod and the second inclined rod is hinged with the second sliding block; the prestressed tendon assembly comprises an anchor and prestressed tendons, the anchor is arranged on the connecting rods, and the prestressed tendons sequentially pass through the connecting rods on one side, the pore canal of the second sliding rail and finally are anchored on the anchor on the connecting rod on the other side through the anchor; the adjusting assembly further comprises third sliding blocks, supporting rods and third inclined rods, each second sliding block is connected with one third sliding block through one supporting rod, and each first sliding block is connected with the third sliding block through one third inclined rod.
The truss system formed by the tensioning assembly and the adjusting assembly has the advantages that the structural rigidity can be effectively increased, the bearing capacity and the crack resistance of the structure are improved, the self-tensioning of prestress is realized, the tensioning assembly can ensure the stability of prestress tensioning, meanwhile, the prestress tensioning is completed and fixed to form a stressed framework, the tensioning assembly, the adjusting assembly and the prestress rib assembly jointly act to realize the combined reinforcement of the concrete structure, the truss system can effectively tension and anchor the prestress rib, the tensioning process can realize the tensioning and secondary regulation of the prestress only by rotating the adjusting rod without external tensioning equipment, the reinforcing efficiency of the whole device is greatly improved, the advantages of the combined reinforcement mode of the truss system and the external prestress tensioning are fully exerted, and the truss system has wide application in the field of reinforcing the concrete structure.
In order to make the person skilled in the art better understand the solution of the present invention, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The invention provides a combined reinforcement device for realizing prestress self-tensioning and secondary regulation, which is used for reinforcing a concrete bridge, and is combined with figures 1, 2, 4 and 5, wherein the combined reinforcement device for external prestress tensioning and anchoring comprises: the tensioning assembly 10 and the adjusting assembly 20 are fixed on the concrete structure 40 through bolts, the prestressed tendon assembly 30 is fixed on the tensioning assembly 10, the tensioning assembly 10 is in driving connection with the adjusting assembly 20, the tensioning assembly 10 is used for tensioning the prestressed tendons, the adjusting assembly 20 is used for adjusting the tensioning degree of the prestressed tendons, and the prestressed tendon assembly 30 is used for fixing the prestressed tendons; the tensioning assembly 10 comprises two first slide rails 101 which are arranged in parallel in the horizontal direction, two connecting rods 102 which are connected with the two first slide rails 101, two first diagonal rods 104 and two second diagonal rods 105, wherein the connecting rods 102 support and limit the first slide rails 101, two ends of each connecting rod 102 are respectively provided with a first sliding block 103, the first sliding blocks 103 are arranged on the first slide rails 101, and the first sliding blocks 103 can generate certain displacement in the first slide rails 101 along the horizontal direction; the adjusting assembly 20 comprises a second sliding rail 201 which is perpendicular to the first sliding rail 101, the second sliding rail 201 is positioned in the middle of the first sliding rail 101, two second sliding blocks 202 and an adjusting rod 203 which are arranged on the second sliding rail 201, the adjusting rod 203 passes through one second sliding block 202 and is fixedly connected with the other second sliding block 202, and the relative distance between the two second sliding blocks 202 can be changed by rotating the adjusting rod 203, so that the two connecting rods 102 move to one side far away from the second sliding rail 201; the first inclined rod 104 is hinged with the second inclined rod 105 through a bolt in a crossed manner, the middle parts of the first inclined rod 104 and the second inclined rod 105 are sunken, the first inclined rod 104 and the second inclined rod 105 are convenient to hinge, one end of each of the first inclined rod 104 and the second inclined rod 105 is hinged with the connecting rod 102 through a bolt, the other end of each of the first inclined rod 104 and the second inclined rod 105 is hinged with the second sliding block 202 through a bolt, and the first sliding block 103 and the second sliding block 202 can generate certain displacement through rotating the adjusting rod 205; the prestress rib assembly 30 comprises an anchorage 301 and a prestress rib 302, wherein the anchorage 301 is arranged on the connecting rod 102, the anchorage 301 can anchor the prestress rib 302 and maintain the tension of the prestress rib 302, the prestress rib 302 sequentially passes through the connecting rod 102 on one side and a pore canal of the second sliding rail 201 through the anchorage 301 to finally reach the connecting rod 102 on the other side, the two connecting rods 102 can move towards one side far away from the second sliding rail 201 through rotating the adjusting rod 203, the prestress rib 302 is stretched, when the specified prestress is reached, the rotating is stopped, the adjusting rod 203 is screwed, the connecting rods 102 on the two sides are fixed through bolts, so that the prestress rib 302 is stretched, when the prestress rib 302 is relaxed, the operation is repeated, the secondary regulation and the secondary regulation of the prestress rib 302 can be realized, the whole combined fixing device has strong bearing capacity and anti-cracking performance, and good stretching and anchoring effects; the adjusting assembly 20 further comprises third sliding blocks 204, supporting rods 205 and third inclined rods 206, each second sliding block 202 is connected with one third sliding block 204 through one supporting rod 205, each first sliding block 103 is connected with the third sliding block 204 through one third inclined rod 206, and the third inclined rods 206 are used for further improving the stability of the whole device and the tensioning effect of the prestressed tendons.
In the present embodiment, as shown in fig. 1, the number of the third diagonal rods 206 is four; in other embodiments, the number of third diagonal rods 206 may be any other number.
Further, in this embodiment, referring to fig. 1 and 2, the connecting rod 102 includes a supporting portion 1021 and a working portion 1022, the supporting portion 1021 is fixed on the concrete structure 40, the working portion 1022 is disposed on a surface of the supporting portion 1021, the supporting portion 1021 is a bottom steel plate, the bottom steel plate directly contacts the concrete structure 40, the surface steel plate of the working portion 1022 is disposed on a surface of the bottom steel plate, which is not in contact with the concrete structure 40, the supporting portion 1021 supports the working portion 1022, and the working portion 1022 supports the first diagonal member 104 and the second diagonal member 105.
Further, in this embodiment, referring to fig. 1 and 2, the support portions 1021 of the first sliding rail 101, the second sliding rail 201, and the connecting rod 102 are respectively provided with a long hole 106 for facilitating movement of the first diagonal member 104, the second diagonal member 105, and the third diagonal member 206, and the first diagonal member 104, the second diagonal member 105, and the third diagonal member 206 can freely move in the long holes 106 to improve stability of the whole truss system after tensioning the tendon 302.
Further, in this embodiment, in combination with fig. 1, 2 and 3, the operation portion 1022 is provided with a bending portion for facilitating the anchoring of the tendon, the surface steel plate is bent towards the direction of the second sliding rail 201, and the bending portion is disposed at a position above the anchoring portion of the tendon 302.
Further, in this embodiment, in combination with fig. 1, fig. 2 and fig. 3, the bending portion is further provided with a through hole 1023 for the tendon 302 to pass through, and the through hole 1023 is matched with the anchor 301 to make the tendon 302 more convenient to anchor.
Further, in this embodiment, referring to fig. 1, 2 and 3, a stiffening rib 1024 for ensuring the strength of the working part 1022 is further provided at the through hole 1023 of the working part 1022, so as to further improve the stability and torsion resistance of the whole truss system.
Further, in this embodiment, referring to fig. 1, 2 and 3, the fixing hole 1025 for fixing is formed in the supporting portion 1021, and when the tendon 302 is tensioned, the rotation of the adjusting rod 203 is stopped, and the two connecting rods 102 are fixed to the concrete structure 40 by the screws and the fixing blocks 1025, so that the whole combined reinforcement device is kept stable.
Further, in this embodiment, as shown in fig. 6, in combination with fig. 1 and 6, the tendon assembly 30 further includes a turning block 303, where the turning block 303 is symmetrical with respect to the second sliding rail 201 and is fixed on the concrete structure 40, and a groove 3031 for maintaining the position of the tendon 302 is formed by partially recessing the turning block 303, so as to apply a force in the vertical direction to the concrete structure 40, and improve the tensioning effect of the tendon 302.
The working principle of the combined reinforcing device for realizing the prestress self-tensioning and secondary regulation provided by the embodiment of the invention is as follows:
the tensioning assembly 10 and the adjusting assembly 20 jointly form a truss system of the whole combined reinforcing device, the rotating adjusting rod 203 is used for realizing the relative distance change between the two second sliding blocks 202, simultaneously, the third sliding blocks 204 in the second sliding rail 201 are driven to generate certain vertical displacement, when the third inclined rod 206 moves vertically near one end of the second sliding rail 201, the third inclined rod 206 and the first inclined rod 104 and the second inclined rod 105 of the tensioning assembly 10 drive the connecting rod 102 in the tensioning assembly 10 to move together, so that the prestressed tendons 302 are tensioned, when the prestress of the prestressed tendons 302 meets the requirement, the rotating adjusting rod 203 is stopped, so that the prestressed tendons 302 can be tensioned without the aid of an external device, after the prestressed tendons are tensioned, the tensioning assembly 10 is fixed through bolts through fixing holes 1025 arranged on the connecting rod 102, the truss system becomes a stressed framework, the rigidity of the structure is enhanced, simultaneously, the prestress loss can be effectively reduced, the prestressed tendons 302 and the whole combined reinforcing system is formed by the whole combined reinforcing system together with the whole truss system, the concrete structure 40 bears the external load effect, the bearing capacity of the structure is effectively improved, and the subsequent prestressed tendons 302 can be relieved by repeating the operation of the tensioning assembly 10 for two times.
The combined reinforcement device for realizing the self-tensioning and secondary regulation of the prestress in the embodiment has the advantages that the structure is simple, the operation is convenient, the truss system formed by the tensioning assembly 10 and the regulating assembly 20 can effectively increase the structural rigidity, the bearing capacity and the crack resistance of the structure are improved, the self-tensioning of the prestress is realized, the tensioning assembly 10 can ensure the stability of the prestress during tensioning, meanwhile, the prestress tensioning is finished and fixed to form a stressed framework, the combined reinforcement of the concrete structure 40 is realized by the combined action of the tensioning assembly 10, the regulating assembly 20 and the prestress rib assembly 30, the truss system formed by combining the tensioning assembly 10, the regulating assembly 20 and the prestress rib assembly 30 can effectively tension and anchor the prestress rib 302, the tensioning process can realize the tensioning and secondary regulation of the prestress only by rotating the regulating rod 203 without using external tensioning equipment, the reinforcement efficiency of the whole device is greatly improved, the advantages of the combined reinforcement mode of the truss system and the external prestress tensioning are fully exerted, and the combined reinforcement method is widely applied to the reinforcement field of the concrete structure.
The embodiment of the invention also provides a combined reinforcement method for realizing the self-tensioning and secondary regulation of the prestress, as shown in fig. 7, comprising the following steps:
s10, fixing two parallel first sliding rails 101 on a concrete structure 40, respectively installing first sliding blocks 103 in the two first sliding rails 101, and connecting corresponding first sliding blocks 103 in the two first sliding rails 101 through connecting rods 102;
s20, fixing a second slide rail 201 on a concrete structure 40 and perpendicular to a first slide rail 101, wherein two second slide blocks 202 and two third slide blocks 204 are arranged in the second slide rail 201, the second slide blocks 202 and the third slide blocks 204 are connected one by one through support rods 205, and an adjusting rod 203 penetrates through the pore channels of the two second slide blocks 202 and one end of the adjusting rod is connected with one of the second slide blocks 202 through nuts;
s30, a first inclined rod 104 is hinged with a second inclined rod 105 in a crossing way, one end of each of the first inclined rod 104 and the second inclined rod 105 is hinged with a connecting rod 102, the other end of each of the first inclined rod 104 and the second inclined rod 105 is hinged with a third sliding block 204, and two ends of a third inclined rod 206 are respectively hinged with a first sliding block 103 and a second sliding block 202;
s40, one end of the prestressed tendon 302 is anchored on one side of the connecting rod 102, sequentially passes through a through hole 1023, one side steering block 303, a second sliding rail 201 and the other side steering block 303 on the connecting rod 102, and finally the other end of the prestressed tendon 302 is anchored on the other side of the connecting rod 102;
and S50, rotating the adjusting rod 203, under the action of the first inclined rod 104 and the second inclined rod 105, moving the two connecting rods 102 to the side far away from the second sliding rail 201, stretching the prestressed tendons 302, stopping rotating and tightening the adjusting rod 203 when the specified prestress is reached, and thus completing the stretching of the prestressed tendons 302.
And S60, when the reinforcing device works together with the concrete structure 40 for a period of time and prestress loss is caused by the phenomena of prestress rib relaxation and the like, the fixing bolt is released, and the step S50 is repeated, so that secondary regulation and control of the prestress rib can be completed.
Further, in this embodiment, before step S10, the method further includes manufacturing the concrete structure 40 and each structure of the combined fixing device in advance in a factory according to the design dimensions, polishing, positioning and drilling the surface of the concrete structure, determining the installation positions of the first sliding rail 101 and the second sliding rail 201 in the reinforced area of the concrete structure 40, and drilling holes by a drilling machine.
The combined strengthening device for self-tensioning and secondary regulation of prestress in the embodiment is simple in steps and convenient to operate, the truss system formed by the tensioning assembly 10, the adjusting assembly 20 and the prestress rib assembly 30 can effectively increase structural rigidity, bearing capacity and crack resistance of the structure are improved, self-tensioning of prestress is achieved, the tensioning assembly 10 can ensure stability of prestress tensioning, meanwhile, the prestress tensioning is completed and fixed to form a stressed framework, the truss system can effectively tension and anchor the prestress rib 302, external tensioning equipment is not needed in the tensioning process, the prestress tensioning and secondary regulation can be achieved only through rotating the adjusting rod 203, strengthening efficiency of the whole device is greatly improved, advantages of a combined strengthening mode of the truss system and external prestress tensioning are fully exerted, and the combined strengthening device has wide application in the field of concrete structure strengthening.
It is apparent that the above-described embodiments are merely preferred embodiments of the present invention, not all of which are shown in the drawings, which do not limit the scope of the invention. This invention may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the invention are directly or indirectly applied to other related technical fields, and are also within the scope of the invention.
Claims (9)
1. The utility model provides a realize prestressing force and stretch-draw and secondary regulation and control's combination reinforcing apparatus which characterized in that includes:
the device comprises a tensioning assembly, an adjusting assembly and a prestressed tendon assembly, wherein the tensioning assembly is in driving connection with the adjusting assembly and is fixed on a concrete structure, and the prestressed tendon assembly is fixed on the tensioning assembly;
the tensioning assembly comprises two first sliding rails which are arranged in parallel, a connecting rod which connects the two first sliding rails, a first inclined rod and a second inclined rod, wherein first sliding blocks are arranged at two ends of the connecting rod, and the first sliding blocks are arranged on the first sliding rails;
the adjusting assembly comprises a second sliding rail, two second sliding blocks and an adjusting rod, wherein the second sliding rail is perpendicular to the first sliding rail, the two second sliding blocks are arranged on the second sliding rail, the adjusting rod penetrates through one second sliding block and is fixedly connected with the other second sliding block, the first inclined rod is hinged with the second inclined rod in a crossing manner, one end of each of the first inclined rod and the second inclined rod is hinged with the connecting rod, and the other end of each of the first inclined rod and the second inclined rod is hinged with the second sliding block;
the prestress rib assembly comprises an anchor and prestress ribs, the anchor is arranged on the connecting rods, and the prestress ribs sequentially pass through the connecting rods on one side, the pore canal of the second sliding rail and the anchor finally anchored on the connecting rods on the other side through the anchor;
the adjusting assembly further comprises third sliding blocks, supporting rods and third inclined rods, each second sliding block is connected with one third sliding block through one supporting rod, and each first sliding block is connected with the third sliding block through one third inclined rod.
2. The combined reinforcing device for realizing prestress self-tensioning and secondary regulation according to claim 1, wherein the connecting rod comprises a supporting part and a working part, the supporting part is fixed on a concrete structure, and the working part is arranged on the surface of the supporting part.
3. The combined reinforcing device for realizing prestress self-tensioning and secondary regulation according to claim 2, wherein the first sliding rail, the second sliding rail and the supporting part of the connecting rod are respectively provided with a strip hole for facilitating movement of the first inclined rod, the second inclined rod and the third inclined rod.
4. The combined reinforcing device for realizing self-tensioning and secondary regulation and control of prestress according to claim 3, wherein the operation part is provided with a bending part which is convenient for anchoring the prestress rib.
5. The combined reinforcing device for realizing self-tensioning and secondary regulation and control of prestress according to claim 4, wherein the bending part is further provided with a through hole for the prestress rib to pass through.
6. The combined reinforcing device for realizing prestress self-tensioning and secondary regulation and control according to claim 5, wherein a stiffening rib for guaranteeing the strength of the working part is further arranged at the through hole of the working part.
7. The combined reinforcing device for realizing prestress self-tensioning and secondary regulation and control according to claim 6, wherein the supporting part is provided with a fixing hole for fixing.
8. The combined reinforcement device for realizing self-tensioning and secondary regulation of prestress according to claim 1, wherein the prestress rib assembly further comprises a turning block which is symmetrical with respect to the second slide rail and is fixed on a concrete structure, and the turning block is partially recessed to form a groove for maintaining the position of the prestress rib.
9. A method applied to the device of any one of claims 1 to 8, comprising the steps of:
s10, fixing two parallel first sliding rails on a concrete structure, and arranging first sliding blocks in the two first sliding rails, wherein the corresponding first sliding blocks in the two first sliding rails are connected through connecting rods;
s20, fixing a second sliding rail on a concrete structure and perpendicular to the first sliding rail, and loading two second sliding blocks and two third sliding blocks in the second sliding rail, wherein the second sliding blocks and the third sliding blocks are connected one by one through supporting rods, and the adjusting rods penetrate through pore channels of the two third sliding blocks and connect one end of each of the adjusting rods with one third sliding block through nuts;
s30, a first inclined rod and a second inclined rod are hinged in a crossed mode, one end of each of the first inclined rod and the second inclined rod is hinged to the connecting rod, the other end of each of the first inclined rod and the second inclined rod is hinged to the third sliding block, and two ends of the third inclined rod are respectively hinged to the first sliding block and the second sliding block;
s40, firstly anchoring one end of the prestressed tendon on one side of the connecting rod, sequentially passing through a through hole on the connecting rod, a steering block on one side, the second sliding rail and the steering block on the other side, and finally anchoring the other end of the prestressed tendon on the connecting rod on the other side;
s50, rotating the adjusting rod, under the action of the first inclined rod and the second inclined rod, both the connecting rods move to the side far away from the second sliding rail, the prestressed tendons are tensioned, and when the specified prestress is reached, the rotating of the adjusting rod is stopped, and the connecting rods are fixed through bolts, so that tensioning of the prestressed tendons is completed;
and S60, when the reinforcing device works together with the concrete structure for a period of time, if the prestress loss is caused by the loosening phenomenon of the prestress rib, the fixing bolt is released, and the step S50 is repeated, so that the secondary regulation and control of the prestress rib can be completed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607503.XA CN114991516B (en) | 2022-05-31 | 2022-05-31 | Combined reinforcing device and method for realizing prestress self-tensioning and secondary regulation |
| PCT/CN2022/098134 WO2023231073A1 (en) | 2022-05-31 | 2022-06-10 | Combined reinforcing device and method for achieving prestress self-tensioning and secondary regulation and control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210607503.XA CN114991516B (en) | 2022-05-31 | 2022-05-31 | Combined reinforcing device and method for realizing prestress self-tensioning and secondary regulation |
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| CN114991516A CN114991516A (en) | 2022-09-02 |
| CN114991516B true CN114991516B (en) | 2023-08-29 |
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| WO (1) | WO2023231073A1 (en) |
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| CN105862608B (en) * | 2016-05-20 | 2017-09-19 | 东南大学 | The automation tensioning system and method for a kind of pre-stress fibre plate reinforcing slab plate |
| CN112096108B (en) * | 2020-08-26 | 2021-07-23 | 河海大学 | Embedded external prestress implementation system and RC column reinforcing construction method thereof |
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| CN106522114A (en) * | 2016-10-28 | 2017-03-22 | 同济大学 | Concrete structure prestress reinforcing device adopting CFRP cloth |
| CN207905556U (en) * | 2017-12-25 | 2018-09-25 | 广东坚朗五金制品股份有限公司 | Sliding stay hinge device |
| CN108103965A (en) * | 2018-01-12 | 2018-06-01 | 长沙理工大学 | It is a kind of to reinforce with prestressing force Bailey beam and its construction method |
| CN108193607A (en) * | 2018-01-12 | 2018-06-22 | 长沙理工大学 | It is a kind of to reinforce with prefabricated PC truss and its construction method |
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| CN210947839U (en) * | 2019-06-06 | 2020-07-07 | 上海建工集团股份有限公司 | External prestressing force reinforced concrete beam structure |
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| WO2023231073A1 (en) | 2023-12-07 |
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