Construction device and method for lifting, rectifying and replacing support of curved bridge

Abstract

The application discloses a kind of curve bridge jacking deviation replacement support construction device and method, device includes: limiting device, hoisting device and jacking deviation device;Limiting device is installed at bridge expansion joint position;Hoisting device includes fixing device, connecting piece, hanger, walking rod, sling and tray;The hanger is connected with fixing device by connecting piece, walking rod assembly is slidably connected with hanger, the both ends of sling are connected with walking rod assembly and tray respectively, and fixing device is connected with pier column;Jacking deviation device is set at the top of pier column and is located on both sides of support, and jacking deviation device includes transverse jack, vertical jack, base and sliding assembly;Sliding assembly and transverse jack are connected with base, and the output end of transverse jack is located on the side close to sliding assembly, and the top of sliding assembly is connected with vertical jack, and the application solves the problems of bridge lateral slip overrun accident in jacking deviation process, difficult support hoisting and installation and small construction difficulty of the top of pier column.

Description

Technical Field

[0001] This invention relates to the field of bridge maintenance and correction technology, specifically to a construction device and method for jacking up and correcting the bearings of a curved bridge and replacing them. Background Technology

[0002] The slippage problem of curved beam bridges has always been a problem in my country's bridge construction. Although it is not uncommon, it has not received much attention because it does not directly endanger the safety of the bridge in most cases. It is only in recent years, with the continuous increase in traffic volume and the improvement of safety requirements, that this problem has attracted enough attention.

[0003] Aside from inherent design and construction problems in some curved girder bridges, girder misalignment is more often caused by factors during bridge operation. During bridge use, adverse factors such as environmental factors (temperature differences, etc.), traffic volume (overloading and high traffic volume), and accidental events (earthquakes, impacts) can cause lateral displacement of the girder. However, due to the stress characteristics and support arrangement of curved girder bridges, the lateral displacement cannot be fully recovered after the external factors disappear, resulting in irreversible residual displacement. Therefore, under long-term repeated loading, the lateral displacement accumulates, leading to significant lateral deviation of the bridge, support detachment or shear failure, expansion joint jamming, and in certain situations, even girder overturning accidents.

[0004] During the jacking and correction process of bridges, accidents of excessive lateral slippage of the beam body often occur, and the replacement of bearings is very difficult to hoist and install. The narrow space at the top of the pier also causes great difficulties for construction operations. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a construction device and method for jacking up and correcting the bearings of curved bridges.

[0006] A construction device for jacking up and correcting bearing replacement of a curved bridge includes: a limiting device, a hoisting device, and a jacking and correcting device.

[0007] The limiting device is installed at the bridge deck expansion joint;

[0008] The hoisting device includes a fixing device, a connector, a hanger, a traveling rod assembly, slings, and a tray; the hanger is connected to the fixing device via the connector, the traveling rod assembly is slidably connected to the hanger, the two ends of the slings are respectively connected to the traveling rod assembly and the tray, and the fixing device is connected to the pier.

[0009] The lifting and correction device is installed on the top of the pier and on both sides of the old support. The lifting and correction device includes a horizontal jack, a vertical jack, a base and a sliding component. The sliding component and the horizontal jack are both connected to the base. The output end of the horizontal jack is located on the side close to the sliding component. The top of the sliding component is connected to the vertical jack.

[0010] Furthermore, the limiting device includes a limiting rod and an anchor bolt. One end of the limiting rod is fixed to the crossbeam span on the side of the correction by the anchor bolt, and the other end of the limiting rod extends to the crossbeam span on the side of the non-correction.

[0011] Furthermore, the fixing device is a clamp.

[0012] Furthermore, the connector consists of two pairs of ear supports, which are symmetrically arranged on the clamp.

[0013] Furthermore, the hanger includes two pairs of vertical rods, multiple horizontal rods, and a pair of longitudinal rods; the pairs of vertical rods are respectively connected to two pairs of lugs, the pairs of vertical rods are connected to the pairs of longitudinal rods, and the pairs of longitudinal rods are connected to each other by multiple horizontal rods; the traveling rod assembly includes traveling rods and connecting rods, both longitudinal rods are provided with traveling rods inside, the traveling rods are slidably connected to the inner wall of the longitudinal rods, the two traveling rods are connected to each other by multiple connecting rods, and the connecting rods are connected to the slings.

[0014] Furthermore, the bottom of the longitudinal rod is provided with an opening, and a gear is provided at the opening. The gear is connected to the longitudinal rod through a fixed rod, and the bottom of the traveling rod is provided with teeth, which mesh with the gear.

[0015] Furthermore, the sliding assembly consists of two layers of PTFE plates, with grease applied between the two PTFE plates.

[0016] A construction method for a curved bridge jacking, correction, and bearing replacement construction device based on any one of the above-mentioned methods includes the following steps:

[0017] S1: At least two sets of limiting devices are installed at the bridge deck expansion joint of the correction beam span. One end of the limiting rod is fixed to the correction side beam span by anchor bolts, and the other end of the limiting rod extends to the non-correction side beam span.

[0018] S2: Install a lifting and correction device on the top surface of the pier column. The lifting and correction device is installed on both sides of the support. The beam span is corrected by adjusting the direction of the base and the lifting distance of the horizontal jack and the vertical jack.

[0019] S3: Weld connectors on both sides of the fixing device, and weld the hanger to the connectors for fixation. After the lifting and correction device corrects and resets the beam, conduct a trial lift. If the trial lift is normal, carry out the formal lifting. Remove the old support through the lifting device. After the new support is lifted, leveled and positioned, remove the lifting device. Depressurize the horizontal jacks and vertical jacks and lower the beam.

[0020] Furthermore, in step S2, the parameters for synchronous jacking of the single pier beam structure are determined based on the beam's deflection limit, structural characteristics, and overall jacking height. Vertical jacks are used for trial jacking. After the trial jacking is successful, the vertical jacks are used for tiered jacking. After each jacking, the operation of the machine and equipment is stopped and checked. Once everything is normal, the jacking is continued until the total jacking height is reached.

[0021] Furthermore, after the vertical jacks reach the required total lifting height in step S2, the horizontal jacks are used for trial jacking. After the trial jacking is successful, the formal jacking is carried out. The horizontal jacks are used for horizontal and vertical jacking in stages. After each jacking, the jacks are stopped, and the horizontal jacks are locked with pressure. The operation of each machine and equipment is observed, and any abnormalities are observed in the pier and beam. After everything is normal, the jacking continues until the total displacement is reached.

[0022] The technical solution of this invention has the following advantages:

[0023] 1. The technical solution provided by this invention uses a limiting device set on the bridge deck to prevent the beam from shifting beyond the limit. The lifting and correction device uses jacks to lift and move the beam back to its original position. After the beam is back to its original position, a hoisting device is installed to replace the supports. After the supports are installed, the hoisting device is removed, and finally the beam is lowered. The whole process is convenient and quick, the construction method has a high safety factor, and the impact range is small.

[0024] 2. The curved bridge jacking and correction bearing replacement construction device provided by the present invention has a compact structure and can be fully utilized in the narrow space at the top of the pier.

[0025] 3. The curved bridge jacking and correction bearing replacement construction device provided by the present invention can be adapted to more bridge structures of different specifications through the sliding connection between the walking rod assembly and the hanger. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the construction device for lifting, correcting, and replacing bearings of a curved beam bridge provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the hoisting device structure;

[0029] Figure 3 This is a side view of the hoisting device structure;

[0030] Figure 4 This is a front view of the hoisting device structure;

[0031] Figure 5 This is a schematic diagram of the lifting and correction device structure;

[0032] Figure 6 This is a side view of the lifting and correction device structure;

[0033] Figure 7 Diagram showing the lateral displacement of the vertical jacks in the lifting and correction device;

[0034] Figure 8 This is a schematic diagram of the construction method of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Limiting device; 11-Limiting rod; 12-Anchor bolt;

[0037] 2-Lifting device; 21-Clamping clamp; 22-Ear support;

[0038] 23-Hanging frame; 24-Traveling pole; 25-Sling;

[0039] 26-Pallet; 27-Gear; 3-Lifting and straightening device;

[0040] 31-Horizontal jack; 32-Vertical jack; 33-Base;

[0041] 34 - PTFE sheet; 41 - Expansion joint; 42 - Old support;

[0042] 43-New support. Detailed Implementation

[0043] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Please participate Figures 1 to 7 A construction device for jacking up and correcting the bearings of a curved bridge, comprising: a limiting device 1, a hoisting device 2, and a jacking and correcting device 3.

[0048] The limiting device 1 is installed at the bridge deck expansion joint 41;

[0049] The hoisting device 2 includes a fixing device, a connector, a hanger 23, a traveling rod assembly, a sling 25, and a tray 26; the hanger 23 is connected to the fixing device through the connector, the traveling rod assembly is slidably connected to the hanger 23, the two ends of the sling 25 are respectively connected to the traveling rod assembly and the tray 26, and the fixing device is connected to the pier column.

[0050] The lifting and correction device 3 is installed on the top of the pier and located on both sides of the old support 42. The lifting and correction device 3 includes a horizontal jack 31, a vertical jack 32, a base 33 and a sliding component. The sliding component and the horizontal jack 31 are both connected to the base 33. The output end of the horizontal jack 31 is located on the side close to the sliding component. The top of the sliding component is connected to the vertical jack 32.

[0051] In this embodiment, the limiting device 1 includes a limiting rod 11 and an anchor bolt 12. The limiting rod 11 is a square steel tube with a fixed end and a free end at both ends. The fixed end has four holes and is fixed to the beam span on the side of the correction by the anchor bolt 12. The free end extends to the beam span on the side of the non-correction, thereby restricting the lateral movement range of the corrected beam to a controllable range and preventing the beam from slipping.

[0052] In this embodiment, the fixing device is a clamp 21, which is made of two U-shaped steel plates. The maximum static friction generated by clamping the clamp 21 with the bridge pier can effectively overcome the weight of the hoisting device 2.

[0053] In this embodiment, the connector consists of two pairs of ear supports 22. Along the bridge direction, two ear supports 22 are welded to each side of the clamp 21. The ear supports have a T-shaped structure and the ear supports 22 have the advantages of low cost and good connection and support performance.

[0054] In this embodiment, the hanger 23 is a square steel tube structure, including two pairs of vertical rods, multiple horizontal rods, and a pair of longitudinal rods. The pairs of vertical rods are welded to two pairs of lugs 22, and stiffening ribs are provided between the vertical rods and the lugs 22 for reinforcement. The pairs of vertical rods are connected to the pairs of longitudinal rods, and the pairs of longitudinal rods are connected by multiple horizontal rods. An angle steel is used to make a diagonal brace at the front end of the longitudinal rod, which is supported on the lugs 22 to ensure the stability of the hanger 23. The traveling rod assembly includes a traveling rod 24 and a connecting rod. The traveling rod 24 is made of steel tube, and its cross-sectional dimension is one size smaller than that of the longitudinal rod of the hanger 23. The two longitudinal rods are equipped with traveling rods 24 inside, and the traveling rods 24 are slidably connected to the inner wall of the longitudinal rods. The two traveling rods 24 are connected by multiple connecting rods, and the connecting rods are connected to the slings 25. This design is to be suitable for various application scenarios. The extension length of the traveling rod 24 can be adjusted according to the specific bridge structure to prevent unnecessary damage caused by collision with the pier when transporting new supports. Lifting equipment can be installed at the position of the sling 25 and the connecting rod, so that the new support 43 can be lifted more directly and quickly.

[0055] In this embodiment, the bottom of the longitudinal rod is provided with an opening, and a gear 27 is provided at the opening. The gear 27 is connected to the longitudinal rod through a fixed rod. The bottom of the traveling rod 24 is provided with teeth, which mesh with the gear 27. Under the action of the gear 27, the extension length of the traveling rod 24 can be accurately and precisely controlled. Alternatively, other power devices such as motors can be connected to the gears to adjust the extension length of the traveling rod 24 more efficiently and quickly.

[0056] In this embodiment, the sliding component consists of two layers of PTFE plates 34. The function of the two layers of PTFE plates 34 is to provide a sliding surface when the beam is laterally corrected. Applying grease between the two layers of PTFE plates 34 can further reduce friction. PTFE plates have excellent chemical stability, corrosion resistance and low friction performance, making them suitable for the application scenarios of this invention. Common greases such as silicone grease can be selected as the grease.

[0057] Please see Figure 8 The present invention also includes a construction method based on the above-mentioned curved bridge jacking, correction and bearing replacement construction device. These detailed embodiments can be selected and ordered according to different needs of beam jacking and correction construction. The construction method includes the following steps:

[0058] S1: First, prepare for construction by removing debris, mud, and other blockages from the expansion joint 41. Drill holes on the bridge deck on the side of the correction. Install at least two sets of limiting devices at each of the bridge deck expansion joints 41 of the correction beam span. One end of the limiting rod 11 is fixed to the beam span on the side of the correction by anchor bolts 12, and the other end of the limiting rod 11 extends to the beam span on the side of the non-correction. This restricts the lateral movement of the correction beam to a controllable range and prevents the beam from slipping.

[0059] S2: Install the lifting and correction device 3 on the top surface of the pier column. The lifting and correction device 3 is installed on both sides of the support. The correction direction is determined by adjusting the direction of the base 33, and the lifting distance of the horizontal jack 31 and the vertical jack 32 is adjusted to correct the horizontal and longitudinal displacement of the beam span.

[0060] S3: Install hoisting device 2, install fixing device on the upper part of the pier, weld connecting parts on both sides of the fixing device, and weld the hanger 23 to the connecting parts for fixing. After installation, perform a trial hoisting. If there are no problems with the trial hoisting, proceed with the formal hoisting. After the jacking and correction device 3 corrects and resets the beam, use hoisting device 2 to remove the old support 42. After the new support 43 is hoisted, leveled and positioned, remove hoisting device 2, release the pressure of the horizontal jack 31 and the vertical jack 32 and lower the beam.

[0061] In step S2, the parameters for synchronous jacking of the single pier beam structure are determined based on the beam's deflection limit, structural characteristics, and overall jacking height. Vertical jack 32 is used for trial jacking. After the trial jacking is successful, vertical jack 32 is used for jacking in stages. During the jacking process, the jacking force and jacking speed are controlled by monitoring data. Each jacking is stopped after 2mm, paused for 1-2 minutes, and the operation of the machine and equipment is checked, such as the force on the jacks and the extension of the pistons. After everything is normal, the jacking is continued until the total jacking height is reached.

[0062] In step S2, after the vertical jack 32 reaches the required total lifting height, the horizontal jack 31 performs a trial jacking. After the trial jacking is successful, the formal jacking is carried out. The horizontal jack 31 performs horizontal and vertical jacking in stages, stopping after every 2mm of jacking. The horizontal jack 31 is then locked with pressure, and the operation of each machine and equipment is observed. Any abnormalities are observed in the pier and beam. Once everything is normal, the jacking continues until the total displacement is reached.

[0063] The above-mentioned construction method and device for jacking, correcting and replacing bearings achieve the purpose of correcting lateral slippage and replacing bearings damaged by shear and other factors on curved bridges. This construction method has a high safety factor, a small impact range, and is simple, convenient and quick to operate.

[0064] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A curve bridge jacking deviation correction support replacement construction device, characterized in that, The device comprises a limiting device (1), a hoisting device (2) and a jacking and deviation rectifying device (3). The limiting device (1) is installed at the position of the bridge expansion joint (41). The hoisting device (2) comprises a fixing device, a connecting piece, a hanger (23), a walking rod assembly, a sling (25) and a tray (26); the hanger (23) is connected with the fixing device through the connecting piece, the walking rod assembly is slidingly connected with the hanger (23), the two ends of the sling (25) are connected with the walking rod assembly and the tray (26) respectively, and the fixing device is connected with the pier column. The jacking and deviation rectifying device (3) is arranged at the top of the pier column and located on both sides of the old support (42), and comprises a transverse jack (31), a vertical jack (32), a base (33) and a sliding assembly; the sliding assembly and the transverse jack (31) are connected with the base (33), the output end of the transverse jack (31) is located on the side close to the sliding assembly, and the top of the sliding assembly is connected with the vertical jack (32). The limiting device (1) comprises a limiting rod (11) and an anchor bolt (12), one end of the limiting rod (11) is fixed to the deviation rectifying side beam span through the anchor bolt (12), and the other end of the limiting rod (11) extends to the side beam span without deviation rectification.

2. The apparatus of claim 1, wherein, The fixing device is a hoop (21).

3. The apparatus of claim 1, wherein, 4. The device according to claim 3, wherein the connecting piece is two pairs of ear supports (22), and the two pairs of ear supports (22) are symmetrically arranged on the hoop (21). The hanger (23) comprises two pairs of vertical rods, a plurality of horizontal rods and a pair of longitudinal rods; the two pairs of vertical rods are connected with the two pairs of ear supports (22) respectively, the two pairs of longitudinal rods are connected on the two pairs of vertical rods, and the two pairs of longitudinal rods are connected through the plurality of horizontal rods; the walking rod assembly comprises a walking rod (24) and a connecting rod, the two longitudinal rods are internally provided with the walking rod (24), the walking rod (24) is slidingly connected with the inner wall of the longitudinal rod, the two walking rods (24) are connected through the plurality of connecting rods, and the connecting rod is connected with the sling (25).

5. The apparatus of claim 4, wherein, The longitudinal rod is provided with an opening at the bottom, the opening is provided with a gear (27), the gear (27) is connected with the longitudinal rod through a fixing rod, the walking rod (24) is provided with a gear tooth at the bottom, and the gear tooth is in meshing connection with the gear (27).

6. The apparatus of claim 5, wherein, The sliding assembly is two layers of Teflon plates (34), and lubricating grease is applied between the two layers of Teflon plates (34).

7. The apparatus of claim 1, wherein, The device comprises the following steps:

8. A construction method of the curve bridge jacking deviation replacement support construction device based on any one of claims 1-7, characterized in that, S1: at least two sets of limiting devices are arranged at the bridge expansion joint (41) of the deviation rectifying beam span, one end of the limiting rod (11) is fixed to the deviation rectifying side beam span through the anchor bolt (12), and the other end of the limiting rod (11) extends to the side beam span without deviation rectification; S2: the jacking and deviation rectifying device (3) is arranged on the top surface of the pier column, the jacking and deviation rectifying device (3) is installed on both sides of the old support (42), the beam span is rectified in the horizontal and vertical directions by adjusting the direction of the base (33) and the jacking distance of the transverse jack (31) and the vertical jack (32). ​ S3: install hoisting device (2), install fixing device on the upper part of the pier column, weld connecting pieces on both sides of the fixing device, weld the lifting frame (23) on the connecting pieces to fix, after the beam body is corrected and reset by the jacking and rectifying device (3), test hoisting is performed, after the test hoisting is normal, formal hoisting is performed, the old support (42) is removed through the hoisting device (2), after the new support (43) is hoisted, leveled and positioned, the hoisting device (2) is removed, the transverse jack (31) and the vertical jack (32) are depressurized and the beam is lowered.

9. The method of claim 8, wherein, In step S2, the parameters of the single-pier beam structure synchronous jacking are determined according to the deflection limit value of the beam body, the structural characteristics of the beam body and the total jacking height, the vertical jack (32) is tested, after the test jacking is qualified, the vertical jack (32) is jacked in stages, after each jacking, the machine and equipment operation are stopped and checked, after everything is normal, the beam body is jacked in sequence until the total jacking height is reached.

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