Box girder pushing and translation construction device suitable for old and new replacement of existing bridge structure

Abstract

The utility model discloses a box girder pushing and translating construction device suitable for old and new replacement of an existing bridge structure, which comprises steel frames arranged on a pile foundation bearing platform at equal intervals; the slideways are fixed on the steel frame at equal intervals, and the slideways are arranged at equal intervals in the length direction of the steel box girder bridge; the distribution beams are used for supporting the steel box girder bridge; the three-dimensional jacks are arranged at the bottoms of the distribution beams, and each slide way is correspondingly provided with a plurality of three-dimensional jacks, serves as a sliding device matched with the slide way, and is used for jacking and correcting the deviation of the steel box girder bridge; the pushing counter-force backs are arranged at one ends of the distribution beams and are arranged at equal intervals in the length direction of the steel box girder bridge; and the hydraulic pushing jacks are arranged between the pushing counter-force backs and the slideways and are used for pushing the distributive girder and shifting the steel box girder bridge to a specified position. According to the device, the timeliness of old bridge replacement and accurate alignment when a new bridge is moved in can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and in particular, it is a box girder jacking and horizontal movement construction device suitable for the replacement of old bridge structures. Background Technology

[0002] With the development of bridge construction technology, it is necessary to relocate and replace bridge structures under specific environments and conditions. However, whether it is jacking up steel box girders or pulling up old beams, a sliding track with high flatness is required as a temporary foundation structure for jacking and pulling. Therefore, the sliding track must not only meet the requirements of overall strength, but also the requirements of stability and deformation, to ensure that the sliding jacks do not become dislodged due to excessive deformation under stress during the entire relocation process. Generally, due to the need for normal traffic flow during the day, the time allotted for pulling and officially jacking the old beams is limited. Therefore, the pulling process must be error-free and fast and efficient. Upon completion of the jacking, it is crucial to ensure the beams are accurately lowered onto the new supports and connected within a specified time. To guarantee precise alignment and connection of the steel box girder after translation, the sliding device needs not only lifting and supporting capabilities but also precise horizontal correction capabilities. Furthermore, if the jacks directly contact the beam for support, the horizontal jacking jacks can only push the outer sliding jacks as reaction support, inevitably causing local shear stress concentration at the lifting point, which is detrimental to the stability of the sliding jacks. To overcome these difficulties, developing a fast, efficient, and precise box girder jacking and translation construction device is crucial. Utility Model Content

[0003] The purpose of this invention is to provide a box girder jacking and translation construction device suitable for the replacement of existing bridge structures. It uses a combination of pulling, jacking, and translation to replace old bridge structures, making the replacement process fast, efficient, and with high positioning accuracy.

[0004] The technical solution to achieve the purpose of this utility model is as follows:

[0005] A box girder jacking and translation construction device suitable for the replacement of existing bridge structures includes:

[0006] Steel frames are installed at equal intervals on the pile foundation abutments;

[0007] Multiple sliding tracks are fixed at equal intervals on the steel frame, and the multiple sliding tracks are arranged at equal intervals along the length of the steel box girder bridge.

[0008] Distribution beams are used to support steel box girder bridges;

[0009] Three-dimensional jacks are installed at the bottom of the distribution beam. Each slide rail is equipped with multiple three-dimensional jacks as sliding devices that cooperate with the slide rails, and are used for lifting and correcting the steel box girder bridge.

[0010] A plurality of pushing back forces are arranged at one end of the distribution beam and are arranged at equal intervals along the length direction of the steel box girder bridge.

[0011] The hydraulic pushing jack is arranged between the pushing back force and the slide way and is used for pushing the distribution beam to move the steel box girder bridge to a designated position.

[0012] Compared with the prior art, the utility model has the following remarkable advantages:

[0013] The hydraulic pushing jack is connected with the I-shaped steel distribution beam section steel structure bracket at the lower part of the new steel box girder, the hydraulic pushing jack is pushed and slides along with the new steel box girder, the piston rod one end is connected automatic counterforce shearing seat, through automatic counterforce shearing seat in the plug-in shearing block to provide counterforce for hydraulic pushing jack to realize the continuous pushing new steel beam sliding. The three-dimensional jack is installed between the I-shaped steel distribution beam and the double-spliced H-shaped steel slide way, the three-dimensional jack is directly used as the sliding device and can have the double effects of jacking and translation, the jacking and replacement before pushing and translation can be realized, the horizontal deviation of the steel box girder in the transverse and longitudinal bridge direction after translation can be corrected, the smooth butt joint of the new and old tracks can be realized, the normal traffic can be ensured, and the timeliness of bridge replacement can be ensured. The copper strip is arranged outside the three-dimensional jack, the distance between the copper strip and the counterforce slot plate is 5mm, on the one hand, the three-dimensional jack can avoid directly contacting the counterforce slot during the pushing process, and on the other hand, the friction force of the three-dimensional jack after contacting the slot can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the box girder pushing and translation construction device schematic view of bridge structure replacement of the utility model.

[0015] Figure 2 It is the distribution beam and sliding jack schematic view of steel box girder bridge structure lower part of the utility model.

[0016] Figure 3 It is the three-dimensional jack schematic view of the utility model.

[0017] Figure 4 It is the distribution beam and pushing jack schematic view of steel box girder bridge structure lower part of the utility model.

[0018] Figure 5 It is the pushing and translation sliding steel counterforce back and limiting schematic view of the utility model.

[0019] In the drawing: 1, I-shaped steel distribution beam; 2, thick rail steel plate; 3, three-dimensional jack; 4, hydraulic pushing jack; 5, steel column; 6, double-spliced H-shaped steel distribution beam; 7, double-spliced H-shaped steel slide way; 8, steel structure bracket; 9, copper strip; 10, counterforce slot steel plate; 11, pile cap; 12, tetrafluoroethylene plate; 13, mirror surface stainless steel plate; 14, automatic counterforce shearing seat; 15, plug-in shearing block. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] refer to Figures 1-5 This embodiment describes a box girder jacking and translation construction device suitable for the replacement of existing bridge structures. It includes an I-beam distribution beam 1, a sliding track, three-dimensional jacks 3, and hydraulic jacking jacks 4. The sliding track mainly consists of a lower steel column 5, a middle double-section H-beam distribution beam 6, and an upper double-section H-beam sliding rail 7. The steel column 5 and the double-section H-beam distribution beam 6 above it form a steel frame. The steel frame is erected on the pile foundation 11 at 2m intervals along the sliding track direction, and the double-section H-beam sliding rail 7 is erected on the upper part of the steel frame as the sliding rail beam for this bridge translation. The double-section H-beam distribution beam 6 is hoisted under the double-section H-beam slide rail 7 and connected by pre-embedded bolt holes or chemical bolts implanted at the bottom of the distribution beam. Multiple drooping steel structural brackets 8 are welded to one end of the H-beam distribution beam 1 to serve as jacking reaction forces. These steel structural brackets 8 are evenly spaced along the length of the steel box girder bridge, with one steel structural bracket 8 corresponding to each sliding track. Multiple sets of reaction force slotted steel plates 10 are installed on the double-section H-beam slide rail 7 as slide rails for the three-dimensional jacks 3. Two plates in each set are symmetrically fixed to the double-section H-beam slide rail 7. The sliding direction of the three-dimensional jacks 3 is parallel to the width direction of the steel box girder bridge. Thick track steel plates 2 are laid on the double-section H-beam slide rail 7. The three-dimensional jack 3 is directly installed on the bottom surface of the I-beam distribution beam 1 via the upper suspended steel components, serving as a sliding device. The hydraulic jack 4 is installed between the reaction slot steel plate 10 on the sliding track and the steel structure bracket 8 of the I-beam distribution beam 1. The bottom of the three-dimensional jack 3 is fitted with a PTFE plate 12, which forms an upward and downward sliding contact surface with the mirror stainless steel plate 13 laid on the thick track steel plate 2. Multiple sliding tracks are set according to actual engineering needs, and multiple three-dimensional jacks 3 are installed on each sliding track.

[0022] The three-dimensional jack 3 has jacking, built-in transverse (bridge length direction) deviation correction jack and longitudinal (bridge width direction) deviation correction jack, and displacement sensors are installed inside the jacking and transverse and longitudinal jacks of the three-dimensional jack 3. The hydraulic jacking jack 4 can be controlled in the counterforce clamping groove steel plate 10 during the jacking process, and the maximum longitudinal displacement deviation of the bridge is 2mm, when there is a transverse deviation of the steel box girder 1 meter before sliding into position, the deviation can be adjusted by the method of deviation pulling, after the bridge jacking is in position, the horizontal jacking on the sliding rail is used to adjust the transverse deviation as much as possible, if there is still deviation after the jacking is in position, the three-dimensional jack 3 can be used for micro-adjustment to ensure the accurate butt joint of the bridge. The copper strip 9 is arranged outside the three-dimensional jack 3, and the distance between the copper strip 9 and the counterforce clamping groove steel plate 10 welded on both sides of the double-spliced H-shaped steel sliding way 7 is 5mm (single-sided gap), on the one hand, it ensures that the three-dimensional jack 3 does not directly contact the counterforce clamping groove steel plate 10 during the jacking process, and on the other hand, it reduces the friction force of the three-dimensional jack 3 after contacting the counterforce clamping groove steel plate 10. The beam body accurate adjustment and positioning system of the device is composed of three-dimensional jacks 3, three-dimensional adjustment hydraulic servo control units and remote centralized synchronous adjustment consoles, which can realize the functions of multi-point synchronous jacking, floating, rotating, positioning and centering and landing of large steel box girder structure beam body, and realize the accurate butt joint and efficient assembly between large steel box girder structure beam bodies. The three-dimensional adjustment hydraulic servo control unit adopts a DDVC variable frequency speed regulating pump and a three-dimensional jack 3 to form a position closed loop, realizes multi-point force balance control, and can automatically adjust the jacking deviation of the beam body according to the signal input instruction of the detected deviation. The three-dimensional accurate adjustment device adopts distributed control, and the remote centralized synchronous adjustment console connects the three-dimensional adjustment hydraulic servo control unit through industrial Ethernet communication, so as to control the three-dimensional jack 3. The console and the three-dimensional adjustment hydraulic servo control unit are connected through industrial Ethernet communication.

[0023] The hydraulic pushing jack 4 is connected with the section steel bracket 8 of the I-shaped steel distribution beam 1 at the lower part of the steel box beam, and pushes and follows the new steel box beam to slide along the double-spliced H-shaped steel slide 7 in the width direction of the steel box beam. One end of the piston rod of the hydraulic pushing jack 4 is connected with the automatic counterforce shearing seat 14, and the hydraulic pushing jack 4 is provided with counterforce through the plug-shearing block 15 in the automatic counterforce shearing seat 14, so as to stop pushing after pushing for a period of time, and the plug-shearing block 15 is automatically retracted, and the automatic counterforce shearing seat 14 slides to the next counterforce clamping groove along with the piston rod, and then the plug-shearing block 15 is automatically extended to push for the next period of time, so as to realize continuous pushing of the new steel beam. The plug-shearing block 15 is symmetrically arranged in the automatic counterforce shearing seat 14, and the plug-shearing block 15 is driven to realize extension and retraction through the bidirectional motor or electric cylinder arranged in the automatic counterforce shearing seat 14. The counterforce clamping groove steel plate 10 is arranged at equal intervals, and the plug-shearing block 15 can be clamped into the counterforce clamping groove when the plug-shearing block 15 is extended, wherein the size of the counterforce clamping groove is slightly larger than the size of the plug-shearing block 15, so as to facilitate the insertion of the plug-shearing block 15. The counterforce clamping groove steel plate 10 serves as the counterforce back of the hydraulic pushing jack 4, and also serves as the limiting device for pushing translation. The hydraulic pushing jack 4 further comprises a hydraulic pump station and a computer control center. The hydraulic pump station further comprises a PLC controller, a real-time motion controller and a variable frequency speed regulating pump connected through a circuit. The hydraulic pump station is connected with the hydraulic pushing jack 4 through an oil pipe, and the PLC controller is connected with the computer control center through a data line. The displacement sensor is installed in the hydraulic pushing jack 4 and connected with the computer control center through a data line. The hydraulic pump station is provided with a pressure sensor and connected with the computer control center through a data line. The computer control center issues pushing instructions through a computer program and related buttons on the operation platform, drives the hydraulic pump station and the hydraulic pushing jack 4 to work, and monitors the synchronous error and the jacking and pushing pressure through a monitoring screen. When the deviation exceeds the set value, the automatic alarm stops the pushing.

[0024] The steel column 5 is a Φ630mm steel support, the double-spliced H-shaped steel slide 7 is a double-spliced 700mm H-shaped steel distribution beam, two Φ630mm steel supports and the double-spliced 700mm H-shaped steel distribution beam form a steel frame standing on the pile cap 11 every 2m along the translation direction. The double-spliced H-shaped steel slide 7 is paved with a 10mm thick track steel plate 2. The counterforce clamping groove steel plate 10 is 5cm thick.

[0025] Before the bridge pushing, the steel box girder bridge needs to be lifted off the original temporary pre-support, and then the whole structure is lifted by three-dimensional jacks 3 to be replaced to the sliding rail. After the hydraulic system is debugged, the old beam is pulled out, and at the same time, the old beam is pulled out, the synchronous displacement control system is connected to all hydraulic jacking jacks 4, and then the synchronous displacement instruction is sent to all hydraulic jacking jacks 4 to specify the fastest translation speed to move the bridge to the specified design point. At the same time, the hydraulic jacking jacks 4 can be controlled in the counterforce clamping groove steel plate 10 during the pushing process. After the translation is completed, the synchronous falling is rectified, and through the three-dimensional precise adjustment device and the intelligent three-dimensional adjustment hydraulic servo control unit of the three-dimensional jacks 3 and the remote centralized synchronous adjustment console, the precise rectification adjustment is made in the horizontal and vertical directions, the upper track of the steel box girder is smoothly connected, the overall stability of the structure is good, the horizontal movement process is stable and safe, the positioning precision is high, and the timeliness of the old bridge replacement is ensured.

Claims

1. A box girder pushing and translating construction device suitable for the old-for-new replacement of an existing bridge structure, characterized in that, The utility model relates to a steel box girder bridge lifting and rectifying device, including: a steel frame is arranged on a pile cap at equal intervals; a plurality of slides are fixed on the steel frame at equal intervals, and the plurality of slides are arranged at equal intervals along the length direction of the steel box girder bridge; a distribution beam is used for supporting the steel box girder bridge; a three-dimensional jack is arranged at the bottom of the distribution beam, a plurality of three-dimensional jacks are arranged corresponding to each slide, the three-dimensional jacks are used as a sliding device matched with the slide, and the three-dimensional jacks are used for jacking and rectifying the steel box girder bridge; a plurality of pushing back forces are arranged at one end of the distribution beam and are arranged at equal intervals along the length direction of the steel box girder bridge; a hydraulic pushing jack is arranged between the pushing back force and the slide and is used for pushing the distribution beam to move the steel box girder bridge to a specified position.

2. The box girder pushing translation construction device suitable for the old-for-new replacement of the existing bridge structure according to claim 1, characterized in that, The piston rod of the hydraulic pushing jack is connected with an automatic back force shearing seat, the automatic back force shearing seat is symmetrically provided with a plug-in shearing block, and the plug-in shearing block can be extended and retracted; a clamping groove is arranged on the slide at equal intervals, and the plug-in shearing block can be clamped into the clamping groove when the plug-in shearing block is extended.

3. The device for the incremental launching of the box girder of the existing bridge structure according to claim 2, characterized in that, The size of the clamping groove is larger than the size of the plug-in shearing block.

4. The device for the incremental launching of the box girder of the existing bridge structure according to claim 1, characterized in that, A plurality of groups of symmetrically fixed back force clamping groove steel plates are arranged on the steel frame and are used as the slide of the three-dimensional jack; a plurality of groups of track steel plates are arranged on the steel frame, a tetrafluoroethylene plate is arranged at the bottom of the three-dimensional jack, and the tetrafluoroethylene plate is in upper and lower sliding contact with a mirror surface stainless steel plate laid on the track steel plate.

5. The device for the incremental launching of the box girder of the existing bridge structure according to claim 1, characterized in that, A copper strip is arranged outside the three-dimensional jack.

6. The device for the incremental launching of the box girder of the existing bridge structure according to claim 5, characterized in that, The single-side gap between the copper strip and the slide is 5mm.

7. The device for the incremental launching of the box girder of the existing bridge structure according to claim 1, characterized in that, The steel frame comprises a steel column and a steel distribution beam, and the steel distribution beam is fixed on the steel column.

8. The device for the incremental launching of the box girder of the existing bridge structure according to claim 1, characterized in that, A hydraulic servo control unit and a remote centralized synchronous adjustment console are further arranged, the three-dimensional jack is connected with the hydraulic servo control unit, and the remote centralized synchronous adjustment console is connected with the hydraulic servo control unit through industrial Ethernet communication to control the three-dimensional jack.

9. The device for the incremental launching of the box girder of the existing bridge structure according to claim 1, characterized in that, A plurality of downward steel structure corbels are welded at one end of the distribution beam and are used as the pushing back force.

10. The box girder pushing translation construction device suitable for the old-for-new replacement of the existing bridge structure according to claim 1, characterized in that, The steel frame is erected on the pile cap every 2m along the translation direction.

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