CN114351604A - Device for applying external prestress based on field relaxation and bridge reinforcing method - Google Patents
Device for applying external prestress based on field relaxation and bridge reinforcing method Download PDFInfo
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- CN114351604A CN114351604A CN202210189923.0A CN202210189923A CN114351604A CN 114351604 A CN114351604 A CN 114351604A CN 202210189923 A CN202210189923 A CN 202210189923A CN 114351604 A CN114351604 A CN 114351604A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 238000007493 shaping process Methods 0.000 claims abstract description 24
- 230000002787 reinforcement Effects 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 15
- 238000004146 energy storage Methods 0.000 claims abstract description 6
- 210000002435 tendon Anatomy 0.000 claims description 23
- 230000000712 assembly Effects 0.000 claims description 21
- 238000000429 assembly Methods 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910003460 diamond Inorganic materials 0.000 description 15
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- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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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
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Abstract
The invention discloses a device for applying external prestress based on field relaxation and a bridge reinforcing method. The device for applying external prestress based on-site tension releasing consists of an arch back piece, a shaping and tension releasing mechanism, a reinforcing force adjusting mechanism and a reinforcing mechanism. The production, the shaping and the energy storage of the bow back piece can be finished in a factory, so that the construction period can be effectively shortened, and the influence on traffic is reduced; the device carries out structural reinforcement by stretching on site, avoids a series of complex operations such as stretching prestress on site, can adapt to the scene with limited construction space, and avoids the problem that the stretching pretension on site occupies larger construction space; when the device for applying the external prestress based on the field relaxation is used for reinforcing a bridge, the dynamic regulation and control of the reinforcing effect are realized by adapting to the reinforcing requirements of different degrees through the field slow relaxation prestress.
Description
Technical Field
The invention relates to the field of reinforcing and maintaining of bridges and building structures, in particular to a device and a reinforcing method for applying external prestress based on field relaxation.
Background
In the long-term service process of the existing concrete bridge, the concrete bridge is influenced by natural environment, traffic flow, automobile load impact and the like, structure damage is inevitably caused, the bearing capacity performance is reduced, the durability of the bridge is reduced and even the bridge is invalid, and the reinforcing of the damaged bridge becomes a normal state for ensuring the normal operation of the bridge. In the existing bridge reinforcing method, short plates with long period and high reinforcing cost are commonly used. Therefore, it is necessary to develop a reinforcing method for rapid transformation and improvement of bridge bearing capacity.
Currently, common concrete reinforcement methods include: a cross-section enlarging method, a steel plate pasting method, a fiber composite pasting method, an in vitro prestressing method and the like. The reinforcing method of increasing the cross section is adopted to newly increase the hysteresis effect of stress and strain between the reinforcing layer and the original structural layer, so that the material waste is caused; the reinforcing method by sticking the steel plate or the fiber composite material can effectively improve the longitudinal stress of the concrete beam and inhibit the extension of cracks, thereby improving the bearing capacity of the structure, but has high requirements on the sticking flatness and cleanliness, the sticking material is easy to peel off from the surface of the reinforced structure, the economic cost is high, and the durability is poor; the external prestress reinforcing method can achieve the effects of improving beam body downwarping, closing part cracks and improving the total bearing capacity of the structure, but the construction process is complex, the reinforcing space is limited, the tensioning precision control is difficult to guarantee, and the prestress field tensioning and the like are required by means of a large jack, a construction platform and the like. Meanwhile, several commonly used reinforcement methods cannot realize dynamic regulation and control of reinforcement effect.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a device for applying external prestress based on field tension release, which can reinforce a building body.
The invention also provides a bridge reinforcing method with the device for applying the external prestress based on the field relaxation.
According to a first aspect of the invention, an apparatus for applying an extracorporeal pre-stress based on in-situ relaxation comprises:
an arch back piece formed by bending an elastic rod piece;
the shaping and opening mechanism is connected with the bow back piece and can shape and open the bow back piece;
the reinforcing force adjusting mechanism can be fixedly connected with a building body to be reinforced, and can be connected with the bow back piece so as to adjust the tension degree of the bow back piece;
the reinforcing mechanism is connected with the bow back piece, the reinforcing mechanism can be connected with two sides of the area to be reinforced, and the reinforcing mechanism can pull and draw the connecting points of the area to be reinforced close to the center direction along with the unfolding of the bow back piece.
The device for applying the external prestress based on the field relaxation has at least the following beneficial effects:
1. the production, the shaping and the energy storage of the bow back piece can be completed in a factory, so that the construction period can be effectively shortened, and the influence on traffic is reduced.
2. The device is structurally reinforced by stretching on site, so that a series of complex operations such as stretching prestress on site are avoided. Meanwhile, the method can be suitable for the scene with limited construction space, and the problem that the large construction space is occupied due to the fact that tensioning and pre-tightening are carried out on the site is avoided.
3. The device for applying the external prestress based on-site tension releasing is symmetrically arranged on two sides of the region to be reinforced, and the use space of the lower part of the region to be reinforced cannot be influenced.
4. After the device for applying the external prestress based on the field tension is used for reinforcing the bridge, the overall rigidity and the durability of a reinforcing area can be improved, the bearing capacity of the bridge is improved, local cracks are closed and the like under the traction action of the bow back piece.
5. The reinforcing of cracks with different degrees is carried out by slowly releasing and tensioning the prestress on site, and the dynamic regulation and control of the reinforcing effect are realized.
According to some embodiments of the invention, the shaping and releasing mechanism comprises a prestressed tendon and a telescopic adjusting component, the prestressed tendon is arranged on the inner side of the bow back piece, the prestressed tendon is parallel to the releasing and releasing direction of the bow back piece, two ends of the prestressed tendon are connected with the bow back piece through the telescopic adjusting component, and at least one telescopic adjusting component can adjust the extension length along the releasing and releasing direction of the bow back piece.
According to some embodiments of the invention, the telescopic adjusting assembly comprises a threaded anchor, a steering inner sleeve, a steering outer sleeve, a worm and a worm fixing piece, wherein a first connecting hole is formed in the inner side of the bow back piece, the steering outer sleeve is hinged to the first connecting hole, the steering inner sleeve is rotatably arranged in the steering outer sleeve, the threaded anchor is connected with one end of the prestressed tendon, the threaded anchor is in threaded connection with the inside of the steering inner sleeve, turbine teeth extending out of the steering outer sleeve are arranged on the steering inner sleeve, the worm and the turbine teeth are in meshing transmission, and the worm is rotatably mounted on the steering outer sleeve through the worm fixing piece.
According to some embodiments of the invention, the reinforcement means comprises two anchor rods, opposite ends of the two anchor rods being hingedly connected together in a hinge joint, the hinge joint being connected to the outer side of the bow back member, the other ends of the two anchor rods being hingably connected to one side of the area to be reinforced, respectively.
According to some embodiments of the present invention, the reinforcing mechanism includes a movable diamond frame and two connecting assemblies, one hinge joint of the movable diamond frame is connected to an outer side of the back bow member, each of the two connecting assemblies includes a sliding groove member and a sliding connecting member, the two sliding groove members are used to be fixedly mounted on two sides of a region to be reinforced, a sliding groove is formed on each sliding groove member, the sliding groove is arranged along a direction perpendicular to a tension direction of the back bow member, the sliding connecting member is arranged in the sliding groove, the sliding connecting member can slide along the sliding groove, the two hinge joints at two ends of the movable diamond frame are respectively hinged to the sliding connecting member, and the other hinge joint is used to be fixedly connected to a side of the region to be reinforced, which is far away from the back bow member.
According to some embodiments of the invention, the reinforcement means comprises two anchor rods, opposite ends of the two anchor rods being hingedly connected together in a hinge joint, the hinge joint being connected to the outer side of the bow back member, the other ends of the two anchor rods being hingably connected to one side of the area to be reinforced, respectively.
According to some embodiments of the invention, the reinforcement mechanism comprises a movable diamond-shaped frame, one of the hinge joints of which is connected to the outside of the back bow, and the other three hinge joints are fixedly connectable to the outside of the area to be reinforced.
According to the second aspect of the invention, the bridge reinforcing method comprises the following steps: the device for applying the external prestress based on the field relaxation is used for reinforcing the bridge through the following steps:
step S100: bending the elastic rod piece into the bow back piece in a factory, shaping and storing energy of the bow back piece through the shaping and releasing mechanism, and transporting the bow back piece to a construction site after the energy storage is finished;
step S200: fixedly connecting the reinforcing force adjusting mechanism with a positioning position and then connecting the reinforcing force adjusting mechanism with the arch back piece;
step S300: connecting the reinforcing mechanism to both sides of the region to be reinforced, and then connecting the reinforcing mechanism to the arch back piece;
step S400: adjusting the shaping and releasing mechanism to control the shaping and releasing mechanism to release the bow back piece, controlling the releasing and releasing degree of the bow back piece through the reinforcing force adjusting mechanism, and drawing the connecting points on two sides of the area to be reinforced close to the center direction along with the releasing and releasing of the bow back piece by the reinforcing mechanism so as to close the crack of the area to be reinforced.
The bridge reinforcing method provided by the embodiment of the invention at least has the following beneficial effects:
1. the production, the shaping and the energy storage of the bow back piece can be completed in a factory, so that the construction period can be effectively shortened, and the influence on traffic is reduced.
2. The device carries out structural reinforcement through the on-site tension prestress, and avoids a series of complex operations such as on-site tension prestress and the like. Meanwhile, the method can be suitable for the scene with limited construction space, and the problem that the large construction space is occupied due to the fact that tensioning and pre-tightening are carried out on the site is avoided.
3. The device for applying the external prestress based on-site tension releasing is symmetrically arranged on two sides of the region to be reinforced, and the use space of the lower part of the region to be reinforced cannot be influenced.
4. After the device for applying the external prestress based on the field tension is used for reinforcing the bridge, the overall rigidity and the durability of a reinforcing area can be improved, the bearing capacity of the bridge is improved, local cracks are closed and the like under the traction action of the bow back piece.
5. The reinforcing of cracks with different degrees is carried out by slowly releasing and tensioning the prestress on site, and the dynamic regulation and control of the reinforcing effect are realized.
According to some embodiments of the present invention, in step S100, the two ends of the tendon are connected to the telescoping adjustment assemblies and are connected to the inner sides of the two ends of the back bow member through the telescoping adjustment assemblies, and when the back bow member is expanded, the back bow member is expanded as at least one of the telescoping adjustment assemblies is extended.
According to some embodiments of the invention, in step S100, a steering inner sleeve is installed in a steering outer sleeve, the steering outer sleeve is hinged to a first connecting hole, a worm is meshed with turbine teeth of the steering inner sleeve, the worm is rotatably installed on the steering outer sleeve through a worm fixing piece, two ends of the prestressed tendon are connected with a threaded anchor, the threaded anchor is installed in the steering inner sleeve, the steering inner sleeve rotates along with the worm by adjusting rotation of the worm during tensioning, and the threaded anchor is driven to screw in or screw out of the steering inner sleeve during rotation of the steering inner sleeve, so that the arch back piece is tensioned.
According to some embodiments of the present invention, in step S200, a fixed connection seat is installed at a positioning position, a screw is rotatably installed on the fixed connection seat, a special-shaped nut seat is screwed on the screw, and the position of the special-shaped nut seat on the screw is adjusted by adjusting the rotation of the screw, so that both ends of the bow back member can be just connected with the corresponding special-shaped nut seats.
According to some embodiments of the present invention, in step S300, the hinge joints at the opposite ends of the two anchor rods are connected to the outer side of the back bow member, the other two ends of the two anchor rods are hinged to both sides of the region to be reinforced, when the back bow member is expanded, the back bow member pulls the connected hinge joints to move in the vertical expansion direction, and the hinge end points at the two ends generate a movement tendency to be close to each other in the central direction of the two, so that the crack of the region to be reinforced is closed.
According to some embodiments of the present invention, in step S300, one hinge joint of the movable diamond frame is connected to the outer side of the back member, two sliding groove members are fixedly installed on the left and right sides of the region to be reinforced, the two hinge joints at the two ends of the movable diamond frame are respectively hinged to the sliding connectors, the other hinge joint is fixedly connected to the side of the region to be reinforced away from the back member, when the back member is expanded, the back member pulls the connected hinge joints to move in the vertical expanding direction, and the two hinge joints at the two ends pull the sliding groove members to approach to each other in the central direction through the sliding connectors in the sliding grooves, so that the crack of the region to be reinforced is closed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic installation diagram of a device for applying external prestressing force based on field relaxation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a device for applying an external pre-stress based on field relaxation according to an embodiment of the present invention after reinforcement is completed;
FIG. 3 is a schematic structural view of an arch back piece and a tendon according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a telescoping adjustment assembly according to an embodiment of the invention;
FIG. 5 is a sectional view of the inner steering sleeve, the outer steering sleeve and the threaded anchor of an embodiment of the present invention installed;
FIG. 6 is a schematic structural diagram of a reinforcing force adjustment assembly according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a contoured nut seat in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of the installation of a device for applying an external prestressing force based on field relaxation according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of a second embodiment of the apparatus for applying external prestressing force based on field relaxation according to the present invention after reinforcement is completed.
Reference numerals:
100. an arch-back member; 110. a first connection hole; 120. a second connection hole; 130. a third connection hole;
200. a shaping and releasing mechanism; 210. prestressed tendons; 220. a telescopic adjustment assembly; 221. a threaded anchor; 222. an inner steering sleeve; 2221. a turbine tooth; 223. a steering outer sleeve; 2231. a truss bore; 2232. an anchoring hole; 224. a worm; 225. a worm mount;
300. a reinforcing force adjusting mechanism; 310. a reinforcement force adjustment assembly; 311. fixing the connecting seat; 312. a screw; 313. a special-shaped nut seat;
400. a reinforcement mechanism; 410. a movable diamond frame; 420. a connecting assembly; 421. a chute member; 422. a sliding connector; 430. an anchor rod; 440. a cross bar;
500. a building body to be reinforced; 510. and (4) cracking.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
An apparatus for applying an extracorporeal pre-stress based on in-situ relaxation according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
As shown in fig. 1 and 2, the apparatus for applying an external prestress based on field relaxation according to an embodiment of the present invention includes:
an arch back piece 100, the arch back piece 100 being formed by bending an elastic rod piece; in this embodiment, the bow member 100 is formed by bending an elastic rod made of a material having high elasticity and high rigidity, and the elastic rod is bent into the bow member 100 by a press machine in a factory.
A shaping and unfolding mechanism 200 connected to the arch back 100 for shaping and unfolding the arch back 100;
the reinforcing force adjusting mechanism 300 is used for fixedly connecting the reinforcing force adjusting mechanism 300 with the building 500 to be reinforced, and the reinforcing force adjusting mechanism 300 can be connected with the arch back piece 100 so as to adjust the tension degree of the arch back piece 100;
the reinforcing mechanism 400 is connected with the arch back piece 100, the reinforcing mechanism 400 can be connected with two sides of the area to be reinforced, and the reinforcing mechanism 400 can draw the connecting point of the area to be reinforced to be close to the center direction along with the unfolding of the arch back piece 100.
The invention also discloses a bridge reinforcing method, and the device for applying external prestress based on field tension is used for reinforcing the bridge through the following steps:
step S100: bending the elastic rod into an arch back piece 100 in a factory, and shaping the arch back piece 100 through a shaping and unfolding mechanism 200 to ensure that the arch back piece 100 keeps the shape, and transporting the arch back piece to a construction site after energy storage; the back bow 100 is now in equilibrium and is then transported to the site of the concrete beam bridge to be reinforced. The production, manufacture and shaping of the bow back piece 100 can be prefabricated in a factory, and a series of complex operations such as tensioning prestress on site are avoided, so that the construction period can be effectively shortened, and the influence on traffic is reduced.
Step S200: fixedly connecting the reinforcing force adjusting mechanism 300 with the positioning position of the area to be reinforced and then connecting the reinforcing force adjusting mechanism with the arch back piece 100; the positioning position is determined according to the field situation, and is a position for installing the reinforcing force adjusting mechanism 300, and is generally located at two sides in front of the crack 510 of the region to be reinforced, after the bow back member 100 is connected with the reinforcing force adjusting mechanism 300, the bow back member 100 is fixed on the building 500 to be reinforced, and then the tension degree of the bow back member 100 is adjusted by the reinforcing force adjusting mechanism 300.
Step S300: attaching the reinforcement mechanism 400 to both sides of the area to be reinforced, and then attaching the reinforcement mechanism 400 to the arch-back 100;
step S400: adjusting the shaping and releasing mechanism 200 to enable the shaping and releasing mechanism 200 to control the back of the bow 100 to release, controlling the releasing and releasing degree of the back of the bow 100 through the reinforcing force adjusting mechanism 300, and drawing the connecting points at two sides of the area to be reinforced to be close to the center direction along with the releasing and releasing of the back of the bow 100 by the reinforcing mechanism 400, so that the crack 510 of the area to be reinforced is closed.
The device for applying the external prestress based on-site tension releasing is symmetrically arranged on two sides of the region to be reinforced, and the use space of the lower part of the region to be reinforced cannot be influenced. After the device for applying the external prestress based on the field tension is used for reinforcing the bridge, the rigidity and the durability of a reinforcing area can be improved under the traction action of the bow back piece, and the bearing capacity of the bridge is improved. The reinforcing amount of the bridge is adjusted on site, the adjustment is flexible, the bridge can adapt to cracks of different degrees, and the arch back piece 100 can store certain prestress, so that after the cracks are expanded again, the secondary reinforcement can be realized by adjusting the tension degree of the arch back piece 100.
In some embodiments of the present invention, the sizing and releasing mechanism 200 includes a tendon 210 and a telescopic adjusting component 220, the tendon 210 is disposed inside the arch back 100, the tendon 210 is parallel to the releasing and releasing direction of the arch back 100, two ends of the tendon 210 are connected to the arch back 100 through the telescopic adjusting component 220, and at least one telescopic adjusting component 220 can adjust the extension length along the releasing and releasing direction of the arch back 100.
As shown in fig. 3 to 5, after the bow-back piece 100 is formed, the two ends of the tendon 210 are connected to the telescopic adjusting assemblies 220 and are connected to the inner sides of the two ends of the bow-back piece 100 through the telescopic adjusting assemblies 220, and when the bow-back piece 100 is opened, as at least one of the telescopic adjusting assemblies 220 extends, the total length of the tendon 210 plus the telescopic adjusting assembly 220 is increased, and the bow-back piece 100 is opened.
In a particular embodiment, the two telescoping adjustment assemblies 220 may be one that is adjustable for extension and the other one that is a fixed length connector, which makes the overall structure simpler. Another embodiment is where the length of both telescoping assemblies 220 can be adjusted so that the overall adjustment is wider and a greater range of adjustment can be made to the degree of expansion of the arch-back 100.
In a further embodiment of the present invention, the telescopic adjustment assembly 220 comprises a threaded anchor 221, a steering inner sleeve 222, a steering outer sleeve 223, a worm 224 and a worm fixing member 225, the inner side of the bow back member 100 is provided with the first connection hole 110, the steering outer sleeve 223 is hinged with the first connection hole 110, the steering inner sleeve 222 is rotatably arranged in the steering outer sleeve 223, the threaded anchor 221 is connected with one end of the prestressed tendon 210, the threaded anchor 221 is screwed in the barrel of the steering inner sleeve 222, the steering inner sleeve 222 is provided with a turbine tooth 2221 extending out of the steering outer sleeve 223, the worm 224 is in meshing transmission with the turbine tooth 2221, and the worm 224 is rotatably mounted on the steering outer sleeve 223 through the worm fixing member 225.
Specifically, the inner steering sleeve 222 is installed in the outer steering sleeve 223, the outer steering sleeve 223 is hinged to the first connection hole 110, the worm 224 is meshed with the turbine teeth 2221 of the inner steering sleeve 222, the worm 224 is rotatably installed on the outer steering sleeve 223 through the worm fixing piece 225, two ends of the prestressed tendon 210 are connected with the threaded anchor 221, then the threaded anchor 221 is installed in the inner steering sleeve 222, when the arch is expanded, the inner steering sleeve 222 rotates along with the rotation of the worm 224 through adjustment, the threaded anchor 221 is driven to screw in or screw out of the inner steering sleeve 222 in the rotating process of the inner steering sleeve 222, when the threaded anchor 221 is screwed out of the inner steering sleeve 222, the total length of the inner steering sleeve 210 and the telescopic adjustment assembly 220 is prolonged, and the arch back piece 100 is expanded.
Wherein, the outer steering sleeve 223 is provided with a truss hole 2231 corresponding to the first connection hole 110, and the truss hole 2231 is hinged to the first connection hole 110 by a pin. The inner steering sleeve 222 and the outer steering sleeve 223 are rotatably connected through a snap groove. Two anchoring holes 2232 are welded to the outer surface of the outer turning sleeve 223, and a worm fastener 225 is connected to the anchoring holes 2232 to rotatably mount the worm 224 to the outer turning sleeve 223.
In some embodiments of the present invention, the reinforcing force adjusting mechanism 300 includes two reinforcing force adjusting assemblies 310, two ends of the arch back 100 are connected to a corresponding one of the reinforcing force adjusting assemblies 310, the reinforcing force adjusting assemblies 310 can be fixedly connected to a positioning position of the building 500 to be reinforced, at least one of the reinforcing force adjusting assemblies 310 includes a fixed connection seat 311, a screw 312, and a special-shaped nut seat 313, the fixed connection seat 311 is used for being fixedly connected to the positioning position of the building 500 to be reinforced, the screw 312 is rotatably installed on the fixed connection seat 311, an axial direction of the screw 312 is the same as a releasing and expanding direction of the arch back 100, the special-shaped nut seat 313 is in threaded connection with the screw 312, and the special-shaped nut seat 313 can be connected to one end of the arch back 100. The building 500 to be reinforced may be a bridge, a tunnel, or the like, which is required to be reinforced due to the crack 510.
Referring to fig. 6 and 7, in this embodiment, the fixed connection seat 311 is installed at a positioning position, the screw 312 is rotatably installed on the fixed connection seat 311, the special-shaped nut seat 313 is threadedly connected to the screw 312, the second connection holes 120 are formed at two ends of the bow back 100, the sleeve column is arranged on the special-shaped nut seat 313, and the position of the special-shaped nut seat 313 on the screw 312 is adjusted by rotating the adjustment screw 312, so that the second connection holes 120 at two ends of the bow back 100 can be just sleeved on the sleeve column of the special-shaped nut seat 313.
Wherein, the locating position specifically is located the crack 510 top both sides of treating the reinforcement region, and fixed connection seat 311 specifically is foraminiferous channel-section steel, and fixed connection seat 311 is equipped with the guide way, and the guide way is in the same direction with putting of bow back spare 100, and screw rod 312 sets up in the guide way, and both ends and fixed connection seat 311 rotate to be connected, is equipped with a plurality of screws that are used for with locating position fixed connection on the fixed connection seat 311. During installation, the fixed connection seat 311 passes the screw hole with the foraminiferous steel bay through the crab-bolt, and in the anchor goes into the concrete layer, screws up with the nut, accomplishes fixed connection seat 311's fixed.
In some embodiments, the two stiffening assemblies 310 may be one stiffening assembly 310 adjustable and the other a conventional fastener capable of being fixed in place and attached to the end of the backrest 100, which makes the overall structure simpler. Another embodiment is that both of the reinforcing force adjustment assemblies 310 can be adjusted, such that the back arch member 100 can always be maintained to be symmetrically disposed about the center line of the region to be reinforced, such that the direction of the force applied to the reinforcing mechanism 400 is not changed, thereby preventing the anchor rod or the movable diamond from being distorted.
In some embodiments of the present invention, the reinforcement mechanism 400 includes two anchor rods 430, opposite ends of the two anchor rods 430 are hingedly connected together to form a hinge node, the hinge node is connected to the outside of the arch back member 100, and the other ends of the two anchor rods 430 are hingedly connected to one side of the region to be reinforced, respectively. When the bow back 100 is opened, the bow back 100 pulls the two connected anchor rods to rotate, and the hinged joints at the two ends generate a movement trend of closing towards the central direction of the two anchor rods, so that the crack 510 of the area to be reinforced is closed.
Further, after the reinforcement is completed, both ends of the cross bar 440 are connected to the two anchor rods 430, and specifically, the cross bar 440 is connected to the anchor rods 430 by connecting members such as bolts penetrating through the connecting holes of the cross bar 440 to form a tripod structure, thereby stabilizing the overall structure. When the reinforcement is needed again, the cross bar 440 is taken down first, the tension degree of the bow back member 100 is adjusted, and after the reinforcement is achieved again, the cross bar 440 is installed again.
In other embodiments of the present invention, the reinforcing mechanism 400 includes a movable diamond 410 and two connecting assemblies 420, one hinge joint of the movable diamond 410 is connected to the outside of the instep piece 100, each of the two connecting assemblies 420 includes a sliding groove piece 421 and a sliding connecting piece 422, the two sliding groove pieces 421 are used to be fixedly installed on the left and right sides of the area to be reinforced, a sliding groove is formed on the sliding groove piece 421, the sliding groove is arranged along a direction perpendicular to the opening direction of the instep piece 100, the sliding connecting piece 422 is arranged in the sliding groove, the sliding connecting pieces 422 can slide along the sliding groove, the two hinge joints at the two ends of the movable diamond 410 are respectively hinged to the sliding connecting pieces 422, and the other hinge joint is used to be fixedly connected to one side of the area to be reinforced, which is far away from the instep piece 100. One hinged node of the movable diamond frame 410 is connected with the bottom of the outer side of the bow back piece 100, two sliding connecting pieces 422 are fixedly installed on two sides of a region to be reinforced, the sliding groove is arranged along the opening direction perpendicular to the bow back piece 100, the sliding connecting pieces 422 are arranged in the sliding groove and can slide along the sliding groove, the two hinged nodes at two ends of the movable diamond frame 410 are respectively connected with the sliding connecting pieces 422, the other hinged node is fixedly connected with one side, far away from the bow back piece 100, of the region to be reinforced, when the bow back piece 100 is opened, the bow back piece 100 pulls the connected hinged nodes to move towards the vertical opening direction, the two hinged nodes at two ends pull the sliding groove to approach towards the central direction of the two through the sliding connecting pieces 422 in the sliding groove, and therefore a crack 510 of the region to be reinforced is closed.
Referring to fig. 1 and 2, the arch-back piece 100 is installed above the region to be reinforced, a third connecting hole 130 is formed in the outer side of the bottom of the arch-back piece 100, the third connecting hole 130 is hinged to a hinge joint of the movable diamond frame, two sliding grooves are formed in the left side and the right side of the region to be reinforced, and the two sliding grooves are symmetrically arranged with respect to the center line of the region to be reinforced. Two hinged joints at two ends of the movable diamond frame are connected with a sliding connecting piece 422 in the sliding groove. The other hinge joint is fixedly connected to the side of the region to be reinforced remote from the dorsal arch 100.
When the bow back piece 100 is put to open, the bottom of the bow back piece 100 can move upwards, the hinged nodes connected by pulling move towards the vertical opening direction, the movable traction diamond frame 410 deforms, the sliding connection pieces 422 connected by the two hinged nodes at the two ends are limited by the sliding grooves, horizontal opposite force can be generated, the force is transmitted to the area to be reinforced through the sliding groove pieces 421, the two sides of the area to be reinforced are driven to receive traction force, the two sides of the area to be reinforced are drawn close to each other in the central direction, and then the crack 510 of the area to be reinforced is closed.
Moreover, after the device completes the first reinforcement of the reinforced area, the bow back piece 100 can still store certain prestress, and after a period of time, along with the re-expansion of the crack, the reinforced area can be reinforced again by releasing the prestress stored in the bow back piece 100 again.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An apparatus for applying an external pre-stress based on field relaxation, comprising:
an arch back piece formed by bending an elastic rod piece;
the shaping and opening mechanism is connected with the bow back piece and can shape and open the bow back piece;
the reinforcing force adjusting mechanism can be fixedly connected with a building body to be reinforced, and can be connected with the bow back piece so as to adjust the tension degree of the bow back piece;
the reinforcing mechanism is connected with the bow back piece, the reinforcing mechanism can be connected with two sides of the area to be reinforced, and the reinforcing mechanism can pull and draw the connecting points of the area to be reinforced close to the center direction along with the unfolding of the bow back piece.
2. The device for applying extracorporeal pre-stress based on field relaxation of claim 1, wherein: the shaping and releasing mechanism comprises a prestressed tendon and a telescopic adjusting component, the prestressed tendon is arranged on the inner side of the bow back piece, the prestressed tendon is parallel to the releasing and releasing direction of the bow back piece, the two ends of the prestressed tendon are connected with the bow back piece through the telescopic adjusting component, and at least one telescopic adjusting component can be used for adjusting the extending length of the bow back piece in the releasing and releasing direction.
3. The device for applying extracorporeal pre-stress based on field relaxation of claim 2, wherein: the telescopic adjusting assembly comprises a threaded anchor, a steering inner sleeve, a steering outer sleeve, a worm and a worm fixing piece, a first connecting hole is formed in the inner side of the bow back piece, the steering outer sleeve is hinged to the first connecting hole, the steering inner sleeve rotates to be arranged in the steering outer sleeve, the threaded anchor is connected with one end of the prestressed rib, the threaded anchor is in threaded connection with the inner portion of the steering inner sleeve, the steering inner sleeve is provided with turbine teeth extending out of the steering outer sleeve, the worm is in meshing transmission with the turbine teeth, and the worm is installed on the steering outer sleeve in a rotating mode through the worm fixing piece.
4. The device for applying extracorporeal pre-stress based on field relaxation of claim 1, wherein: reinforcing power adjustment mechanism includes two reinforcing power adjustment assembly, the both ends of bow back of the body spare respectively with corresponding one reinforcing power adjustment assembly connects, reinforcing power adjustment assembly can with wait to consolidate the fixed position fixed connection of building body, at least one reinforcing power adjustment assembly includes fixed connection seat, screw rod, special-shaped nut seat, fixed connection seat be used for with fixed position fixed connection, the screw rod rotates to be installed on the fixed connection seat, the axial of screw rod with the bow back of the body spare put a direction syntropy, special-shaped nut seat threaded connection is in on the screw rod, special-shaped nut seat can with the one end of bow back of the body spare is connected.
5. The device for applying extracorporeal pre-stress based on field relaxation of claim 1, wherein: the reinforcing mechanism comprises two anchor rods, opposite ends of the two anchor rods are hinged together to form a hinged joint, the hinged joint is connected with the outer side of the bow back piece, and the other ends of the two anchor rods can be respectively hinged on one side of an area to be reinforced.
6. A bridge reinforcing method is characterized by comprising the following steps: the device for applying external prestress based on field relaxation of any one of claims 1 to 5, wherein the device for applying external prestress based on field relaxation is used for bridge reinforcement through the following steps:
step S100: bending the elastic rod piece into the bow back piece in a factory, shaping and storing energy for the bow back piece through the shaping and releasing mechanism, and transporting the bow back piece to a construction site after the energy storage is finished;
step S200: fixedly connecting the reinforcing force adjusting mechanism with a positioning position and then connecting the reinforcing force adjusting mechanism with the arch back piece;
step S300: connecting the reinforcing mechanism to both sides of the region to be reinforced, and then connecting the reinforcing mechanism to the arch back piece;
step S400: adjusting the shaping and releasing mechanism, controlling the bow back piece to release the bow back piece through the shaping and releasing mechanism, controlling the releasing and releasing degree of the bow back piece through the reinforcing force adjusting mechanism, and drawing the connecting points on two sides of the region to be reinforced to be close to the center direction along with the releasing and releasing of the bow back piece through the reinforcing mechanism so as to close the crack of the region to be reinforced.
7. The bridge reinforcing method according to claim 6, wherein: in step S100, both ends of the tendon are connected to the telescoping adjustment assemblies and connected to the inner sides of both ends of the back bow member through the telescoping adjustment assemblies, and the back bow member is expanded as at least one of the telescoping adjustment assemblies is extended when expanding.
8. The bridge reinforcing method according to claim 7, wherein: in the step S100, a steering inner sleeve is arranged in a steering outer sleeve, the steering outer sleeve is hinged with a first connecting hole, a worm is meshed with turbine teeth of the steering inner sleeve, the worm is rotatably arranged on the steering outer sleeve through a worm fixing piece, two ends of a prestressed tendon are connected with a threaded anchor, the threaded anchor is arranged in the steering inner sleeve, when the arch is unfolded, the steering inner sleeve rotates along with the worm by adjusting the rotation of the worm, and the threaded anchor is driven to be unscrewed out of the steering inner sleeve in the rotating process of the steering inner sleeve, so that the arch back piece is unfolded.
9. The bridge reinforcing method according to claim 6, wherein: in step S200, a fixed connection seat is installed at a positioning position, a screw rod is rotatably installed on the fixed connection seat, a special-shaped nut seat is screwed on the screw rod, and the position of the special-shaped nut seat on the screw rod is adjusted by adjusting the rotation of the screw rod, so that both ends of the bow back piece can be just connected with the corresponding special-shaped nut seat.
10. The bridge reinforcing method according to claim 6, wherein: in step S300, the hinge joints at the opposite ends of the two anchor rods are connected with the outer sides of the back bow member, the other ends of the two anchor rods are respectively hinged to one side of the region to be reinforced, when the back bow member is expanded, the back bow member pulls the connected hinge joints to move in the vertical expansion direction, and the hinge end points at the two ends generate a movement trend of closing towards the central direction of the two, so that the crack of the region to be reinforced is closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189923.0A CN114351604B (en) | 2022-02-28 | 2022-02-28 | Device based on in-situ release Zhang Shijia external prestress and bridge reinforcement method |
| PCT/CN2022/099215 WO2023159811A1 (en) | 2022-02-28 | 2022-06-16 | Device for applying external prestress on basis of on-site release, and bridge reinforcement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189923.0A CN114351604B (en) | 2022-02-28 | 2022-02-28 | Device based on in-situ release Zhang Shijia external prestress and bridge reinforcement method |
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| CN114351604A true CN114351604A (en) | 2022-04-15 |
| CN114351604B CN114351604B (en) | 2023-12-22 |
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| CN202210189923.0A Active CN114351604B (en) | 2022-02-28 | 2022-02-28 | Device based on in-situ release Zhang Shijia external prestress and bridge reinforcement method |
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| WO (1) | WO2023159811A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159811A1 (en) * | 2022-02-28 | 2023-08-31 | 长沙理工大学 | Device for applying external prestress on basis of on-site release, and bridge reinforcement method |
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