CN115045205B - Simply supported bridge reinforcing structure based on counter-force frame traction and reinforcing method thereof - Google Patents
Simply supported bridge reinforcing structure based on counter-force frame traction and reinforcing method thereofInfo
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- CN115045205B CN115045205B CN202210724391.6A CN202210724391A CN115045205B CN 115045205 B CN115045205 B CN 115045205B CN 202210724391 A CN202210724391 A CN 202210724391A CN 115045205 B CN115045205 B CN 115045205B
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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
本发明涉及一种基于反力架牵引的简支桥梁加固结构及其加固方法，原有简支梁桥结构的两个桥台的台帽之间架设有桥梁板，加固结构包括加固顶板和反力架牵引装置，反力架牵引装置设置于地面，包括配重框架和设置在配重框架内的至少一组反力推杆部，反力推杆部包括滑轮轴组、静态横梁、推顶机构和动态横梁；该加固结构通过反力架将多组钢丝绳的水平牵引转化为对加固顶板向下的持续、稳定、均匀的拉力，给弓形加固波纹顶板提供弹性势能，为简支桥梁提供了稳定、安全的加固施工环境，从而实现了旧桥和危桥的加固提载，解决老旧简支桥梁的桥梁板下沉、中央开裂等问题。
The present invention relates to a simply supported bridge reinforcement structure based on reaction frame traction and a reinforcement method thereof, wherein a bridge plate is erected between the abutments of the two abutments of the original simply supported beam bridge structure, the reinforcement structure comprises a reinforcement top plate and a reaction frame traction device, the reaction frame traction device is arranged on the ground, comprises a counterweight frame and at least one group of reaction push rod parts arranged in the counterweight frame, the reaction push rod parts comprise a pulley shaft group, a static crossbeam, a push-up mechanism and a dynamic crossbeam; the reinforcement structure converts the horizontal traction of multiple groups of steel wire ropes into a continuous, stable and uniform downward pulling force on the reinforcement top plate through the reaction frame, provides elastic potential energy to the bow-shaped reinforced corrugated top plate, provides a stable and safe reinforcement construction environment for the simply supported bridge, thereby realizing the reinforcement and loading of old bridges and dangerous bridges, and solving the problems of bridge plate sinking and central cracking of old simply supported bridges.
Description
Technical Field
The invention relates to the technical field of girder bridge lifting reinforcement, in particular to a simple bridge reinforcing structure based on counter-force frame traction and a reinforcing method thereof.
Background
The simple girder bridge is a girder bridge with two ends respectively supported on the abutment as a main bearing structure, and belongs to a statically indeterminate structure. Is the earliest and most widely used bridge form of beam bridges. The beam bridge is suitable for various geological conditions, has simple structure, is easy to manufacture into standardized and assembled components, is convenient to manufacture and install, and is the most widely adopted beam bridge.
As traffic pressure is gradually increased and the service life of the existing bridge is continuously improved, a large number of old bridges and dangerous bridges appear in a large number of simply supported bridges on roads and local roads in China, and the defects of poor durability, cracks, single plates, surface defects, serious bridge deck pavement damage, freeze thawing damage, sinking bridge heads, wing wall outer drums, pier flushing, foundation hollowing and the like are found through investigation on different types of diseases of the bridge, the most common diseases are found, so that the driving comfort is reduced, the direct damage effect of vehicles on bridge structures is more serious, and serious accidents such as vehicle out of control, bridge collapse and the like are directly caused when serious.
Therefore, the maintenance and reinforcement of the simply supported girder bridge gradually become hot spots, the bridge groups needing reinforcement and bearing capacity improvement are increasingly increased, most of the reinforcement methods in the prior art only can unilaterally stabilize the bearing capacity of the bridge to the live load, and the bridge body is not helpful to resist dead weight and increase bearing capacity.
Disclosure of Invention
The invention provides a simple-support bridge reinforcing structure based on counter-force frame traction and a reinforcing method thereof, and solves the problems of high construction difficulty, low construction efficiency, poor reinforcing effect and the like of reinforcing engineering of a simple-support bridge in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the bridge plate is erected between the caps of the two bridge decks of the original simply supported girder bridge structure, and the reinforcing structure comprises a reinforcing top plate and a counter-force frame traction device;
the reinforced top plate is fixedly spanned between bridge decks at two sides or the side walls of the bridge decks, is bent upwards to form an arch structure, and provides an upward supporting force for the bridge plates;
a plurality of groups of connecting rings are arranged on the lower end surface of the reinforced top plate, and the connecting rings are connected with a counter-force frame traction device through traction ropes;
The reaction frame traction device is arranged on the ground and comprises a counterweight frame and at least one group of reaction push rod parts arranged in the counterweight frame, wherein the reaction push rod parts comprise pulley shaft groups, static cross beams, ejection mechanisms and dynamic cross beams;
the static cross beam is fixed in the counterweight frame, and at least one group of traction rope through holes are formed in the static cross beam;
The pulley shaft group comprises a pulley shaft and at least one group of fixed pulleys arranged on the pulley shaft, and the pulley shaft is arranged in a counterweight frame at one side of the static cross beam;
the ejection mechanism is connected with the static cross beam, the other end of the ejection mechanism is connected with the dynamic cross beam, and the static cross beam is parallel to the dynamic cross beam;
The dynamic cross beam is movably arranged in the counterweight frame, and can slide along the counterweight frame under the drive of the ejection mechanism;
One end of the traction rope is connected to the connecting ring, and the other end of the traction rope sequentially passes through the fixed pulley and the traction rope through hole and is fixedly connected with the dynamic cross beam.
Further, the counter weight frame includes two sets of parallel arrangement's longeron, all is equipped with the slide rail on two sets of longerons, and dynamic crossbeam can slide along the slide rail, and the balancing weight is connected at the both ends fixed of longeron.
Further, the counter force push rod parts are arranged in two groups, and the two groups of counter force push rod parts are symmetrically arranged in the counterweight frame.
Further, the counter force push rod parts are arranged in two groups, and the two groups of counter force push rod parts are sequentially arranged in the counterweight frame.
Further, the pulley shafts are arranged between the two groups of longitudinal beams, three groups of fixed pulleys are arranged on each pulley shaft, and each counter-force push rod part is connected with three traction ropes.
Further, the pushing mechanism is a jack, and each counter-force push rod part is provided with two groups of jacks.
Further, the reinforced top plate is a reinforced corrugated top plate.
Furthermore, a pressure-resistant block is arranged between the reinforced corrugated roof and the bridge plate, the whole pressure-resistant block is of a rectangular structure, the upper end face of the pressure-resistant block is horizontal and is tightly attached to the lower end face of the bridge plate, the lower end face of the pressure-resistant block is a cambered surface with a corrugated structure and is tightly attached to the upper end face of the reinforced corrugated roof, the pressure-resistant block is a quick-setting pressure-resistant block, a rubber pressure-resistant block or a concrete pressure-resistant block, and the height of a support replacement space formed at two ends of the reinforced corrugated roof and the bridge plate is not less than 0.5m.
A simple bridge reinforcement method based on counter-force frame traction comprises the following steps of;
the bridge plate of the original simply supported girder bridge leaves the bridge abutment through a crane or a jack;
A reinforced top plate is fixedly arranged between bridge decks at two sides in a crossing way, the reinforced top plate is bent upwards to form an arch structure, and the arch top of the reinforced top plate is higher than the plane where the lower end face of the original bridge plate is positioned;
A reaction frame traction device is arranged on the ground right below the reinforced top plate;
the plurality of groups of connecting rings at the lower end of the reinforced top plate are respectively connected with a traction rope, and the other end of the traction rope is fixedly connected with the dynamic cross beam after passing through the fixed pulley and the traction rope through hole in sequence;
Starting a pushing mechanism, wherein the pushing mechanism pushes the dynamic cross beam to slide in a direction away from the static cross beam, and the dynamic cross beam pulls a plurality of traction ropes to apply downward continuous uniform tension to the reinforced top plate, so that the vault of the reinforced top plate is equal to or lower than the plane where the lower end surface of the original bridge plate is positioned;
the upper end of the reinforced corrugated roof is provided with a pressure-resistant block which is then put back to the original bridge plate;
And starting the ejection mechanism, wherein the ejection mechanism recovers the dynamic cross beam to slide towards the direction close to the static cross beam, the plurality of traction ropes release tension, the reinforced top plate rebounds and arches upwards, and an upward supporting force is provided for the original bridge plate.
Further, the method for reinforcing the two abutment side walls comprises the steps of anchoring the abutment side walls by the reinforcing vertical plates or grouting the abutment side walls by the reinforcing vertical plates after the abutment side walls are anchored at intervals, and pouring the abutment side walls in the formed filling cavities.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the embodiment of the invention, the horizontal traction of a plurality of groups of steel wire ropes is converted into downward tension force on the reinforced corrugated roof by the reaction frame, the downward tension force is accurate and controllable, the tension force is continuous, stable and uniform, and a stable and safe reinforced construction environment is provided for simply supported bridges, so that the problems of reinforcing and carrying of old bridges and dangerous bridges, sinking of bridge slabs, central cracking and the like are solved.
2. According to the bridge reinforcing structure, the pressure-resistant blocks are used for transmitting the supporting force of the bridge plate with the larger flexible area, so that the problem of deformation of the reinforced corrugated roof and the bridge plate caused by point stress is solved, crack development of the bridge under the overload effect is prevented, and the service life of the reinforcing structure is prolonged.
3. According to the invention, the integral reinforcing structure for reinforcing the corrugated roof and the corrugated riser is arranged, the bridge abutment on two sides is reinforced by the corrugated riser and the concrete mortar, and the bridge plate is reinforced and lifted by the corrugated roof, so that the load of the old simply supported bridge is reduced in all directions, and the bridge reinforcing effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic overall construction of an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of a reaction frame traction device according to one embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view showing the structure of a pressure block according to an embodiment of the present invention;
in the figure, a bridge abutment, a 2-deck cap, a 3-bridge plate, a 4-reinforced corrugated roof and a 5-pressure-resistant block are arranged;
6-a reaction frame traction device, 601-a pulley shaft group, 602-a static cross beam, 603-a dynamic cross beam, 604-a longitudinal beam, 605-a balancing weight and 606-a jack;
7-steel wire rope.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
The applicant applied earlier patent number 202111506021.7 relates to a corrugated steel arch type reinforcing structure of a simply supported girder bridge and a reinforcing method thereof, wherein the corrugated steel arch type reinforcing structure is used for realizing the pull-down of a reinforced top plate by hoisting a load through a traction rope, and the method is easy to cause the conditions of uneven downward traction, uncontrollable traction and even unstable traction, so that the reinforced top plate is deformed, bent and other accidents.
In view of the above, the invention provides a simple bridge reinforcing structure based on the traction of a reaction frame and a reinforcing method thereof, wherein the horizontal traction is converted into continuous, stable and uniform pulling force downwards to a reinforced corrugated roof by the reaction frame, so as to provide a convenient and safe reinforcing construction environment for the simple bridge, thereby realizing the reinforcing and carrying of old bridges and dangerous bridges, and solving the problems of sinking, central cracking and the like of bridge slabs.
Example 1:
Referring to the simple bridge reinforcing structure based on the traction of the reaction frame shown in fig. 1, a bridge plate 3 is erected between the caps 2 of two bridge decks 1 of the original simple bridge structure, and the reinforcing structure comprises a reinforcing top plate and a reaction frame traction device 6;
The reinforced top plate is fixedly arranged between the bridge abutment 1 or the side walls of the bridge abutment at two sides in a crossing manner, and is bent upwards to form an arch structure, in the embodiment, the reinforced top plate is a reinforced corrugated top plate 4, the top of the reinforced corrugated top plate is provided with a pressure-resistant block 5, the structure of the pressure-resistant block 5 is shown in fig. 4, the pressure-resistant block 5 is pressed downwards by the bridge plate 3 to generate deformation, and the pressure-resistant block 5 provides an upward supporting force for the bridge plate 3, and in other embodiments, the reinforced top plate can also be a flat steel plate or a hollowed steel plate.
In this embodiment, the two ends of the reinforced corrugated roof 4 are bent vertically downwards to form a connecting end, and the connecting end is fixed between the side walls of the bridge abutment 1 at two sides by chemical anchors, and in other embodiments, the reinforced corrugated roof 4 can also be connected with the bridge abutment 1 at two sides by a pre-anchored bearing platform. Whichever connection mode, the cambered surface of the reinforced corrugated roof and two ends of the bridge plate form a support replacing space for workers to drill into the periodic replacement bridge support after the bridge reinforcing engineering is finished, so that the height of the support replacing space is not less than 0.5m.
In this embodiment, six groups of connecting rings are arranged on the lower end face of the center of the reinforced corrugated roof 4, the six groups of connecting rings are welded at the center of the reinforced corrugated roof 4 in two rows, and the connecting rings are connected with the reaction frame traction device 6 through traction ropes, in this embodiment, the traction ropes are steel wire ropes 7.
Referring to fig. 2 and 3, the reaction frame traction device 6 is disposed on the ground, and includes a counterweight frame and two groups of reaction push rod portions disposed in the counterweight frame, where the two groups of reaction push rod portions have identical structures and are sequentially disposed in the counterweight frame, and the reaction push rod portions include a pulley shaft group 601, a static beam 602, a pushing mechanism and a dynamic beam 603.
The counterweight frame comprises two groups of parallel longitudinal beams 604, sliding rails are arranged on opposite sides of the two groups of longitudinal beams 604, two ends of the longitudinal beams 604 are fixedly connected with a counterweight 605, in the embodiment, the counterweight 605 is a cement pier, the two groups of parallel longitudinal beams 604 penetrate through a plurality of cement piers at two ends of the cement piers, and in other embodiments, the counterweight can also be an object with a certain weight, such as a steel ingot or a water horse.
The static cross beam 602 is welded or bolted and fixed in two groups of longitudinal beams 604 which are arranged in parallel, the static cross beam 602 is a steel beam, and three groups of traction rope through holes which can pass through traction ropes are formed in the beam body of the static cross beam 602.
The dynamic cross beam 603 is arranged in a sliding rail of two sets of parallel arranged longitudinal beams 604, the dynamic cross beam 603 can slide in the two sets of parallel arranged longitudinal beams 604, and the static cross beam 602 is arranged in parallel with the dynamic cross beam 603.
In this embodiment, the pushing mechanism is a jack 606, two groups of jacks 606 are disposed on each counter-force push rod, the two groups of jacks 606 are disposed between the static beam 602 and the dynamic beam 603 and are arranged on two sides of the static beam 602, a base of the jack 606 is fixedly connected with one side of the static beam 602, a top of the jack 606 is fixedly connected with the dynamic beam 603, and the jack 606 can drive the dynamic beam 603 to move away from or approach the static beam 602 when pushing or retracting.
In this embodiment, the pulley shaft group 601 includes a pulley shaft and three fixed pulleys fixedly disposed on the pulley shaft, the pulley shaft is fixedly disposed in two parallel longitudinal beams 604, and the pulley shaft is located outside the static beam 602.
One end of each steel wire rope 7 is connected to the connecting ring of the reinforced corrugated roof 4, and the other end of each steel wire rope 7 sequentially bypasses the fixed pulley and the traction rope through hole and is finally fixedly connected with the dynamic cross beam 603. When six groups of jacks 606 of the two groups of counter-force push rod parts are started, the jacks 606 push the dynamic cross beam 603 to slide along the sliding rail in the direction away from the static cross beam 602, the sliding distance and the sliding speed of the dynamic cross beam 603 can be precisely controlled through the travel of the jacks 606, and then three steel wire ropes 7 are pulled to continuously and uniformly control the downward pulling force of the reinforced corrugated roof 4, so that the vault of the reinforced corrugated roof 4 is equal to or lower than the plane where the lower end face of the original bridge plate is located, and the prestress installation of the bridge plate and the placement of the pressure-resistant blocks can be further completed.
In this embodiment, the reinforced corrugated roof plate is formed by sequentially connecting a plurality of corrugated steel plates, the wall thickness interval of the corrugated steel plates is 2.5 mm-12 mm, the wave pitch is equal to or greater than 380mm, 140mm, 150mm, 50mm, 200mm, 55mm, 230mm, 64mm, 300mm, 110mm or 400mm, 150mm, and the steel plate material comprises Q345, Q235 or Q355.
The simple bridge reinforcement method based on the traction of the reaction frame comprises the following steps of;
Step 1, enabling a bridge plate of an original simply supported girder bridge to leave a bridge abutment through a crane or a jack;
Step 2, a reinforced corrugated roof is fixedly arranged between bridge decks at two sides in a crossing manner, specifically, two ends of the reinforced corrugated roof are vertically bent downwards to form a connecting end, and the connecting end is fixed between the side walls of the bridge decks at two sides through chemical anchor bolts;
step 3, arranging a counter-force frame traction device on the ground right below the reinforced corrugated roof;
Step 4, respectively connecting steel wire ropes on two rows of six groups of connecting rings in the middle of the lower end of the reinforced top plate, sequentially bypassing the fixed pulley and the traction rope through hole at the other end of the steel wire ropes, and finally fixedly connecting the steel wire ropes with the dynamic cross beam;
Step 5, starting the jack, wherein a push rod of the jack pushes the dynamic cross beam to slide along the sliding rail in a direction away from the static cross beam, and the dynamic cross beams of the two groups of counter-force push rod parts push six traction ropes to continuously and evenly pull the reinforced top plate downwards, so that the vault of the reinforced corrugated top plate slowly deforms downwards for a distance, and finally the vault is equal to or lower than the plane where the lower end face of the original bridge plate is located;
Step 6, arranging a pressure-resistant block at the upper end of the reinforced corrugated roof, leveling the bridge plate, slowly placing the bridge plate back to the abutment caps of the bridge abutments at the two sides through a crane or a jack, wherein the lower end face of the bridge plate is not contacted with the pressure-resistant block or slightly contacted with the pressure-resistant block;
and 7, starting the jack, retracting a push rod of the jack, sliding the dynamic cross beam in a direction close to the static cross beam, releasing tension by the plurality of traction ropes, reinforcing the top plate to rebound and arch upwards, and applying an upward supporting force to the original bridge plate through the pressure-resistant block.
Before the step 3, according to the specific condition of the bridge support, the support cushion stone base groove can be polished and leveled, the support cushion stone is placed, and then the rubber bridge support is placed.
According to the simple bridge reinforcing structure pulled by the reaction frame, six pulling ropes are used for providing continuous, stable and uniform downward pulling force for the reinforced corrugated roof and providing elastic potential energy for the arched reinforced corrugated roof, the elastic potential energy provides a pre-stress reinforcing environment for the bridge slab to be reinforced, the working efficiency and the construction quality of reinforcing construction are greatly improved by the reaction frame pulling device, the bearing capacity of old and old bridges is improved, and the bending resistance and shear resistance of the bridge are improved.
Example 2:
Unlike embodiment 1, this embodiment provides a simply supported bridge reinforcing structure based on the traction of the reaction frame and a reinforcing method thereof, wherein before reinforcing the bridge deck, reinforcing work is performed on the two abutment side walls.
The bridge abutment side wall reinforcing structure comprises two groups of reinforcing corrugated vertical plates and reinforcing corrugated top plates, the two groups of reinforcing corrugated vertical plates are respectively anchored on the side walls of the bridge abutment on two sides, grouting spaces are reserved between the reinforcing corrugated vertical plates and the bridge abutment side walls, grouting holes are formed in the reinforcing corrugated vertical plates, concrete mortar is poured in the grouting spaces, and the bridge abutment side walls are reinforced.
The method for reinforcing the simply supported bridge based on the traction of the reaction frame comprises the following steps:
Step 1, firstly, reinforcing two abutment side walls, anchoring the abutment side walls with gaps through reinforcing corrugated vertical plates, then grouting and pouring in a grouting space formed by the reinforcing corrugated vertical plates and the abutment side walls, and connecting and bearing corrugated angle steel at the upper ends of the reinforcing corrugated vertical plates through bolts, wherein in other embodiments, the reinforcing corrugated vertical plates can also be anchored tightly to the abutment side walls.
Step 2, after the pouring object is solidified, enabling a bridge plate of the original simply supported girder bridge to leave a bridge abutment through a crane or a jack;
Step 3, a reinforced corrugated roof is fixedly arranged between bridge decks at two sides in a crossing manner, specifically, two ends of the reinforced corrugated roof are vertically bent downwards to form a connecting end, and the connecting end is fixed between the side walls of the bridge decks at two sides through chemical anchor bolts;
step 4, arranging a counter-force frame traction device on the ground right below the reinforced corrugated roof;
step 5, respectively connecting steel wire ropes on two rows of six groups of connecting rings in the middle of the lower end of the reinforced top plate, sequentially bypassing the fixed pulley and the traction rope through hole at the other end of the steel wire ropes, and finally fixedly connecting the steel wire ropes with the dynamic cross beam;
Step 6, starting the jack, wherein a push rod of the jack pushes a dynamic cross beam to slide along a sliding rail in a direction away from a static cross beam, and the dynamic cross beams of the two groups of counter-force push rod parts drive six traction ropes to continuously and evenly pull a reinforced top plate downwards, so that a vault of the reinforced corrugated top plate slowly deforms downwards for a distance, and finally the vault is equal to or lower than a plane where the lower end face of the original bridge plate is located;
Step 7, arranging a pressure-resistant block at the upper end of the reinforced corrugated roof, leveling the bridge plate, slowly placing the bridge plate back to the abutment caps of the bridge abutments at the two sides through a crane or a jack, wherein the lower end face of the bridge plate is not contacted with the pressure-resistant block or slightly contacted with the pressure-resistant block;
And 8, starting the jack, retracting a push rod of the jack, sliding the dynamic cross beam in a direction close to the static cross beam, releasing tension by the plurality of traction ropes, reinforcing the top plate to rebound and arch upwards, and applying an upward supporting force to the original bridge plate through the pressure-resistant block.
Before the step 4, according to the specific condition of the bridge support, the support cushion stone base groove can be polished and leveled, the support cushion stone is placed, and then the rubber bridge support is placed.
In this embodiment, consolidate ripple riser and concrete mortar accomplish the reinforcement to both sides abutment, accomplish the reinforcement to the bridge slab through the reinforced ripple roof and carry the load, all-round load burden that has alleviateed old simple support girder bridge has improved the bridge reinforcement effect.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The bridge plate is erected between the caps of the two bridge decks of the original simply supported girder bridge structure, and the simple supported girder bridge structure is characterized in that the reinforcing structure comprises a reinforcing top plate and a counterforce frame traction device;
the reinforced top plate is fixedly arranged between bridge decks on two sides in a crossing way, is bent upwards to form an arch structure, and provides an upward supporting force for the bridge plates;
a plurality of groups of connecting rings are arranged on the lower end surface of the reinforced top plate, and the connecting rings are connected with a counter-force frame traction device through traction ropes;
The reaction frame traction device is arranged on the ground and comprises a counterweight frame and at least one group of reaction push rod parts arranged in the counterweight frame, wherein the reaction push rod parts comprise pulley shaft groups, static cross beams, ejection mechanisms and dynamic cross beams;
the static cross beam is fixed in the counterweight frame, and at least one group of traction rope through holes are formed in the static cross beam;
The pulley shaft group comprises a pulley shaft and at least one group of fixed pulleys arranged on the pulley shaft, and the pulley shaft is arranged in a counterweight frame at one side of the static cross beam;
the ejection mechanism is connected with the static cross beam, the other end of the ejection mechanism is connected with the dynamic cross beam, and the static cross beam is parallel to the dynamic cross beam;
The dynamic cross beam is movably arranged in the counterweight frame, and can slide along the counterweight frame under the drive of the ejection mechanism;
One end of the traction rope is connected to the connecting ring, and the other end of the traction rope sequentially passes through the fixed pulley and the traction rope through hole and is fixedly connected with the dynamic cross beam.
2. The simple bridge reinforcing structure based on the traction of the reaction frame according to claim 1, wherein the counterweight frame comprises two groups of longitudinal beams which are arranged in parallel, sliding rails are arranged on the two groups of longitudinal beams, the dynamic cross beam can slide along the sliding rails, and two ends of the longitudinal beams are fixedly connected with balancing weights.
3. The simple bridge reinforcing structure based on the traction of the reaction frame according to claim 2, wherein two groups of the reaction push rod parts are arranged, and the two groups of the reaction push rod parts are symmetrically arranged in the counterweight frame.
4. The bridge girder reinforcing structure based on the traction of the reaction frame according to claim 2, wherein the reaction push rod parts are arranged in two groups, and the two groups of reaction push rod parts are sequentially arranged in the counterweight frame.
5. The simple bridge reinforcing structure based on the traction of the reaction frame according to claim 3 or 4, wherein the pulley shafts are arranged between two groups of longitudinal beams, three groups of fixed pulleys are arranged on each pulley shaft, and each reaction push rod part is connected with three traction ropes.
6. The simply supported bridge reinforcing structure based on the traction of the reaction frame according to claim 5, wherein the pushing mechanism is a jack, and each reaction push rod part is provided with two groups of jacks.
7. The simply supported bridge reinforcement structure based on the traction of the reaction frame according to claim 6, wherein the reinforcement top plate is a reinforcement corrugated top plate.
8. The simple bridge reinforcing structure based on the traction of the reaction frame as claimed in claim 7, wherein a pressure-resistant block is arranged between the reinforced corrugated roof and the bridge plate, the pressure-resistant block is of a rectangular structure, the upper end face of the pressure-resistant block is horizontal and is tightly attached to the lower end face of the bridge plate, the lower end face of the pressure-resistant block is an arc face with a corrugated structure and is tightly attached to the upper end face of the reinforced corrugated roof, the pressure-resistant block is a rubber pressure-resistant block or a concrete pressure-resistant block, and the replacement space height of a support formed at two ends of the reinforced corrugated roof and the bridge plate is not less than 0.5m.
9. The method for reinforcing the simply supported bridge reinforcing structure based on the traction of the reaction frame according to claim 1, which is characterized by comprising the following steps of;
the bridge plate of the original simply supported girder bridge leaves the bridge abutment through a crane or a jack;
A reinforced top plate is fixedly arranged between bridge decks at two sides in a crossing way, the reinforced top plate is bent upwards to form an arch structure, and the arch top of the reinforced top plate is higher than the plane where the lower end face of the original bridge plate is positioned;
A reaction frame traction device is arranged on the ground right below the reinforced top plate;
the plurality of groups of connecting rings at the lower end of the reinforced top plate are respectively connected with a traction rope, and the other end of the traction rope is fixedly connected with the dynamic cross beam after passing through the fixed pulley and the traction rope through hole in sequence;
Starting a pushing mechanism, wherein the pushing mechanism pushes the dynamic cross beam to slide in a direction away from the static cross beam, and the dynamic cross beam pulls a plurality of traction ropes to apply downward continuous uniform tension to the reinforced top plate, so that the vault of the reinforced top plate is equal to or lower than the plane where the lower end surface of the original bridge plate is positioned;
the upper end of the reinforced corrugated roof is provided with a pressure-resistant block which is then put back to the original bridge plate;
And starting the ejection mechanism, wherein the ejection mechanism recovers the dynamic cross beam to slide towards the direction close to the static cross beam, the plurality of traction ropes release tension, the reinforced top plate rebounds and arches upwards, and an upward supporting force is provided for the original bridge plate.
10. The method for reinforcing a simply supported bridge based on traction of a reaction frame according to claim 9, further comprising reinforcing two abutment side walls, wherein the method for reinforcing two abutment side walls comprises grouting in a formed filling cavity after anchoring the abutment side walls at intervals by reinforcing vertical plates or anchoring the abutment side walls closely by the reinforcing vertical plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724391.6A CN115045205B (en) | 2022-06-24 | 2022-06-24 | Simply supported bridge reinforcing structure based on counter-force frame traction and reinforcing method thereof |
Applications Claiming Priority (1)
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| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN114277698A (en) * | 2021-12-10 | 2022-04-05 | 陕西省交通规划设计研究院有限公司 | Corrugated steel arch reinforcement structure of simply supported girder bridge and its reinforcement method |
| CN217710377U (en) * | 2022-06-24 | 2022-11-01 | 陕西省交通规划设计研究院有限公司 | Simply supported bridge reinforced structure based on reaction frame traction |
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| CN202766971U (en) * | 2011-12-26 | 2013-03-06 | 中铁七局集团有限公司 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
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| CN111172878B (en) * | 2019-12-31 | 2021-06-22 | 中铁十二局集团有限公司 | Intelligent preloading system for simulating construction load of arch bridge and construction method |
| CN212247920U (en) * | 2020-03-23 | 2020-12-29 | 衡水益通管业股份有限公司 | Ultrahigh filling corrugated steel arch structure |
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| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN114277698A (en) * | 2021-12-10 | 2022-04-05 | 陕西省交通规划设计研究院有限公司 | Corrugated steel arch reinforcement structure of simply supported girder bridge and its reinforcement method |
| CN217710377U (en) * | 2022-06-24 | 2022-11-01 | 陕西省交通规划设计研究院有限公司 | Simply supported bridge reinforced structure based on reaction frame traction |
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