Curved Girder Jacking Device and Its Construction Method

Abstract

The present invention provides a jacking device for a curved beam, which includes a jacking equipment installed within a frame structure, and a cross beam disposed on the top of the jacking equipment; the frame structure includes a front load conversion reaction seat and a rear load conversion reaction seat, and the front load conversion reaction seat and the rear load conversion reaction seat are fixedly connected by a connecting member, and the jacking equipment is installed between the front load conversion reaction seat and the rear load conversion reaction seat; in the use state, jacking equipment and frame structures are provided on both sides of the lower part of the curved beam, and the cross beam is installed on the jacking equipment on both sides. The present invention can match the offset of the curved beam during the jacking process, so that during the jacking construction of the curved section, the curved beam is always supported by the frame structure of the jacking device, can adapt to the change in the position of the web during the jacking process of the curved beam, and realizes the function of automatic deviation correction after the jacking at the designed mileage is completed. The overall structure is simplified, the control difficulty is reduced, and the construction efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of bridge foundation construction, and in particular to a curved beam jacking device and a construction method thereof. Background Art

[0002] Curved beams are often constructed by hoisting. When ramps or main beams cross existing roads or railways, if lifting equipment is used to hoist the beam structure under the bridge under construction, it will have an adverse impact on traffic. The walking top-pushing construction method is a top-pushing construction technology that can move or adjust the spatial position of ordinary and complex spatial structure beams. The top-pushing construction method is widely used in bridge construction due to its advantages such as less impact on existing lines, simple and light machinery and equipment, and no need for large lifting equipment.

[0003] For curved bridges, the existing jacking construction method is usually carried out by jacking along the bridge and correcting the deviation. For example, CN107841957 A discloses a large-tonnage steel box girder jacking device, jacking system and jacking method. The jacking device includes a jacking telescopic device, a horizontal push telescopic device and a correcting telescopic device. The jacking device, the horizontal push telescopic device and the correcting telescopic device are all installed on a sliding box body. The bottom of the sliding box body is provided with a sliding base for sliding. The two ends of the horizontal push telescopic device and the correcting telescopic device are respectively connected to the sliding box body and the sliding base, so that the sliding base and the sliding box body can move relative to each other. The three telescopic devices of the steel box girder jacking device are respectively arranged in three directions in the three-dimensional coordinate system. The steel box girder is pushed to move by the extension of the oil cylinder, and the steel box girder can be accurately jacked to the designed position as a whole. Correction can be achieved during the jacking process without the need for a slide beam. This structure and method are relatively convenient. However, the correction range of this structure is limited. When the position of the steel box girder exceeds the jacking range of the jacking device, the position of the jacking device still needs to be moved. At the same time, this solution is prone to the problem of unbalanced jacking force on the curved beam when jacking the curved beam. Summary of the invention

[0004] The present invention provides a curved beam pushing device and a construction method thereof, which solve the problems existing in the above-mentioned background technology and provide a curved beam pushing device based on permanent piers, which can match the offset of the curved beam during the pushing process, so that during the curved beam pushing construction process, the curved beam is always supported by the frame structure of the pushing device, can adapt to the change of the web position during the curved beam pushing process, and realize the function of automatic deviation correction after the designed mileage pushing is completed. The overall structure is simplified, the control difficulty is reduced, and the construction efficiency is high, while the problem of unbalanced force during the curved beam pushing is solved.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A curve girder jacking device, including a jacking device, which is installed within a frame structure, and a cross beam is arranged on the top of the jacking device; the frame structure includes a front load conversion reaction seat and a rear load conversion reaction seat, and the front load conversion reaction seat and the rear load conversion reaction seat are fixedly connected through a connecting member, and the jacking device is installed between the front load conversion reaction seat and the rear load conversion reaction seat; in the use state, jacking devices and frame structures are provided on both sides of the lower part of the curve girder, the cross beam is installed on the jacking devices on both sides, and when the jacking device does not act, the height of the upper end surface of the frame structure is higher than the height of the upper end surface of the cross beam.

[0006] In a preferred embodiment, both the front load conversion reaction seat and the rear load conversion reaction seat include two columns, the tops of the two columns are connected with a support seat, and multiple connecting members are respectively connected to the columns.

[0007] In a preferred embodiment, an extension structure for extending the upper end stress surface of the frame structure is provided on one side or both sides of the front load conversion reaction seat and the rear load conversion reaction seat.

[0008] In a preferred embodiment, an inclination sensor is arranged on the cross beam.

[0009] In a preferred embodiment, the jacking device includes a jacking oil cylinder for jacking up the steel box girder, a horizontal pushing oil cylinder for pushing the steel box girder to the target position, and a deviation correction oil cylinder.

[0010] In a preferred embodiment, multiple force sensors are installed on both sides of the upper end surface of the jacking oil cylinder in the jacking device.

[0011] The present invention also provides a curve girder jacking construction method, which is characterized by including the following steps:

[0012] S1. According to the distance between the permanent piers, the jacking device and the frame structure described in any one of claims 1-6 are respectively arranged and fixed on the permanent piers, the cross beam is horizontally arranged on the upper end surfaces of the two jacking devices, and when the jacking device does not act, the height of the upper end surface of the frame structure is higher than the height of the upper end surface of the cross beam, and the curve girder is placed on the upper end surface of the frame structure;

[0013] S2. The jacking device is jacked up so that the cross beam contacts the curve girder, and at this time, the curve girder, the cross beam and the frame structure are simultaneously stressed;

[0014] S3. The jacking device continues to jack up until the curve girder is completely separated from the frame structure, and at this time, the load stress conversion is completed;

[0015] S4. The jacking device jacks up the curve girder for one stroke;

[0016] S5. Load transfer reaction support stage: The jacking equipment descends, places the curved beam on the upper end face of the frame structure, and continues to descend until the curved beam is separated from the cross beam, completing the load transfer;

[0017] S6. Jacking equipment retraction stage: The jacking cylinders of the jacking equipment retract, and the cross beam returns to the initial stage under the action of the jacking equipment;

[0018] Repeat steps S2 - S6 to complete the jacking process of one design mileage of the curved beam;

[0019] S7. Determine the center point of the curved beam through measurement and monitoring, and use the deviation correction cylinders on the jacking equipment to make lateral adjustments to the cross beam 4 thereon to keep the jacking force of the curved beam balanced;

[0020] S8. Deviation correction stage: The jacking equipment continues to rise to the load transfer stage, and through the deviation correction cylinders of the jacking equipment, automatic deviation correction of the curved beam 1 is carried out for one stroke;

[0021] S9. Equipment falling stage: The jacking equipment descends until the curved beam is separated from the cross beam;

[0022] Repeat steps S7 - S9 to complete the repeated deviation correction of the curved beam and finally meet the design alignment requirements of the curved beam.

[0023] In the preferred solution, a guiding beam is provided at the port of the curved beam, and a quick connection method is adopted between the guiding beam and the curved beam.

[0024] In the preferred solution, the quick connection method specifically includes a guiding beam docking section and a box girder docking section; the guiding beam docking section includes a guiding beam connection part, the top of the guiding beam connection part is provided with a first guiding structure, the upper end of the guiding beam connection part is provided with a first tensioning structure below the first guiding structure, and the lower end of the guiding beam connection part is provided with a first positioning hole; the box girder docking section includes a box girder connection part, the top of the box girder connection part is provided with a second guiding structure corresponding to the first guiding structure for guiding, the upper end of the box girder connection part is provided with a second tensioning structure corresponding to the first tensioning structure for tensioning, and the lower end of the box girder connection part is provided with a second positioning hole corresponding to the first positioning hole.

[0025] In the preferred solution, both the guiding beam connection part and the box girder connection part include docking plates and rib plates connected to the docking plates, and corresponding docking holes are provided on the two docking plates;

[0026] The first guiding structure includes a first guiding seat fixedly connected to the top of the guiding beam connection part, and a conical structure hole is provided in the first guiding seat;

[0027] The second guiding structure includes a second guiding seat fixedly connected to the top of the box girder connection part, and a connection hole for connecting bolts is provided in the second guiding seat;

[0028] Both the first tension structure and the second tension structure include two spaced vertical plates connected to the docking plate. Cover plates are provided on the two vertical plates, and tension holes are coaxially provided on the cover plates and the docking plate respectively. The first positioning hole and the second positioning hole are respectively located on the docking plate, and the guide beam docking section and the box girder docking section are positioned by inserting a pin shaft.

[0029] Compared with the prior art, the present invention provides a jacking device for a curved beam and its construction method, which has the following beneficial effects:

[0030] 1. By combining the jacking equipment with the frame structure and the cross beam, during the jacking process, the offset of the curved beam can be matched, so that during the jacking construction of the curved section, the curved beam is always supported by the frame structure of the jacking device, the change in the web position during the jacking of the curved beam can be adapted, and the function of automatic deviation correction can be achieved after the jacking is completed at the designed mileage. The overall structure is simplified, the control difficulty is reduced, and the construction efficiency is high.

[0031] 2. The frame structure includes a front load conversion reaction seat and a rear load conversion reaction seat. The front load conversion reaction seat and the rear load conversion reaction seat are connected and fixed by a connecting piece, providing a firm and stable support for the curved beam and improving the stability of the jacking equipment during operation.

[0032] 3. On one side or both sides of the front load conversion reaction seat and the rear load conversion reaction seat, there is an extension structure for extending the upper force-bearing surface of the frame structure. The extension structure is used to increase the force-bearing surface of the upper end surface of the frame structure, so that the frame structure can support the curved beam more stably.

[0033] 4. By arranging an inclination sensor on the cross beam, it is convenient to detect the inclination condition of the curved beam in real time through the inclination sensor, thereby avoiding the frequent occurrence of rollover. By installing multiple force sensors on both sides of the upper end surface of the jacking cylinder, it is convenient to detect its force condition in real time through the force sensors. Brief Description of the Drawings

[0034] Figure 1 It is a jacking schematic diagram of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the jacking equipment of the present invention in the use state;

[0036] Figure 3 It is a front view structural schematic diagram of the frame structure of the present invention;

[0037] Figure 4 It is a side view structural schematic diagram of the frame structure of the present invention;

[0038] Figure 5 It is a side view structural schematic diagram of the connecting piece of the frame structure of the present invention;

[0039] Figure 6 Structural schematic diagram of the connecting guide beam and curved beam structure of the present invention;

[0040] Figure 7 Front view structural schematic diagram of the connection between the guide beam and the curved beam proposed by the present invention;

[0041] Figure 8 Side view structural schematic diagram of the connection between the guide beam and the curved beam of the present invention;

[0042] Figure 9 Structural schematic diagram of the installation of the jacking oil cylinder force sensor of the jacking equipment of the present invention.

[0043] In the figure: 1 curved beam, 2 jacking equipment, 3 frame structure, 4 cross beam, 5 guide beam, 6 guide beam docking section, 7 box girder docking section, 8 pin shaft, 31 front load conversion reaction seat, 32 rear load conversion reaction seat, 34 connecting piece, 311 column, 312 support seat, 61 guide beam connection part, 62 first guiding structure, 63 first tensioning structure, 64 first positioning hole, 611 docking plate, 612 rib plate, 613 docking hole, 621 first guiding seat, 622 tapered structure hole, 631 vertical plate, 632 cover plate, 633 tensioning hole, 71 box girder connection part, 72 second guiding structure, 73 second tensioning structure, 74 second positioning hole, 721 second guiding seat, 722 connection hole. Detailed implementation manners

[0044] Example 1:

[0045] See Figures 1-4, A curve girder jacking device, including a jacking device 2, the jacking device 2 is installed within a frame structure 3, a cross beam 4 is disposed on top of the jacking device 2; the frame structure 3 includes a front load conversion reaction seat 31 and a rear load conversion reaction seat 32, the front load conversion reaction seat 31 and the rear load conversion reaction seat 32 simultaneously support the curve girder 1, with stable structure. The front load conversion reaction seat 31 and the rear load conversion reaction seat 32 are connected and fixed through a connecting member 34, enhancing the structural strength of the frame structure 3. The jacking device 2 is installed between the front load conversion reaction seat 31 and the rear load conversion reaction seat 32, improving the stability during the operation of the jacking device; in the usage state, on both sides of the lower part of the curve girder 1 (curve curve girder), there are provided the jacking device 2 and the frame structure 3, and the cross beam 4 is placed on the jacking devices 2 on both sides. When the jacking device 2 is not operating, the height of the upper end surface of the frame structure 3 is higher than the height of the upper end surface of the cross beam 4. Through the above structure, during the jacking process, it can match the offset of the curve girder, enabling the curve girder to be always supported by the frame structure of the jacking device during the jacking construction process of the curve section, being able to adapt to the changes in the position of the web during the jacking of the curve curve girder, and realizing the function of automatic deviation correction after the jacking at the designed mileage is completed. The overall structure is simplified, the control difficulty is reduced, and the construction efficiency is high.

[0046] Through the combination of the jacking device 2 with the frame structure 3 and the cross beam 4, the walking type jacking operation of the curve girder 1 is realized, and during the jacking process, the curve girder 1 is always supported on the jacking device, which can greatly reduce the repeated deviation correction during the jacking process and make the operation smoother. When reaching a designed mileage position, overall deviation correction is carried out through the deviation correction oil cylinder of the jacking device 2, simplifying the process, reducing the control difficulty, and improving the construction efficiency.

[0047] The jacking device 2 jacks up the cross beam 4, and acts on the web of the curve girder through the cross beam 4. The purpose of this is: to be able to adapt to the changes in the position of the web during the jacking of the curve curve girder. Simply put, it means that we do not need to move the jacking device to adapt to the changes in the position of the web of the curve girder, thereby stably jacking and correcting the deviation of the curve curve girder.

[0048] Preferably, the jacking device 2 includes a jacking oil cylinder for jacking up the curve girder, a horizontal pushing oil cylinder for pushing the curve girder towards the target position, and a deviation correction oil cylinder. The jacking device 2 can adopt a jacking device disclosed in CN 107841957 A.

[0049] See Figure 4 , The front load conversion reaction seat 31 and the rear load conversion reaction seat 32 are welded into one body through the connecting member 34, and the cross beam 4 is horizontally fixed to the upper end surface of the jacking device 2.

[0050] See Figure 2, both the front load conversion reaction seat 31 and the rear load conversion reaction seat 32 include two columns 311. The tops of the two columns 311 are connected with a support seat 312, and multiple connecting members 34 are respectively connected to the columns 311. The frame structure 3 is stable and firm. The column 311 and the support seat 312 are welded into one piece, and the upper end surface of the support seat 312 contacts and supports the bottom of the support curve beam 1.

[0051] See Figure 2 , one side or both sides of the front load conversion reaction seat 31 and the rear load conversion reaction seat 32 are provided with an extension structure 33 for extending the upper force-bearing surface of the frame structure 3. The extension structure 33 is used to increase the force-bearing surface of the upper end surface of the frame structure 3, so that the frame structure 3 can more stably support the curve beam 1. The upper steel plate of the extension structure 33 is flush welded with the upper end surface of the support seat 312, and a support steel plate is provided at the bottom of the upper steel plate and welded and fixed to the column 311; or the steel plate on the upper end surface of the support seat 312 extends outwards, and a support steel plate is provided at the bottom of the upper end surface steel plate and welded and fixed to the column 311.

[0052] Among them, an inclination sensor is fixedly installed on the cross beam 4. Through the inclination sensor, the inclination condition of the cross beam 4 can be detected in real time, so as to detect the inclination condition of the curve beam 1.

[0053] In addition, a plurality of force sensors are installed on both sides of the upper end surface of the jacking oil cylinder in the jacking device 2. Through the force sensors, the force-bearing condition of the jacking device 2 can be detected in real time.

[0054] Installation and detection method of the force sensor of the jacking oil cylinder:

[0055] 1. Fix at least four L-shaped steel bars to the side surface of the output end of the jacking oil cylinder and arrange them along the circumference. The horizontal end of the L-shaped steel bar is 0.5 - 10 mm higher than the top surface of the jacking oil cylinder. Preferably 1 - 3 mm. A groove is provided on the top surface of the horizontal section of the L-shaped steel bar, and a resistance strain gauge is fixedly installed in the groove. The force change is detected through the deformation of the resistance strain gauge;

[0056] 2. During detection, the change is usually not large under static force and is difficult to detect. However, in the dynamic state of the jacking state, the resistance strain gauge will receive a set of waveform changes. By comparing the waveform amplitudes of the resistance strain gauges on the opposite sides, it can be determined whether it is in a balanced state. Usually, the waveform amplitude of the resistance strain gauge with a larger force is larger.

[0057] It should be noted that both the inclination sensor and the force sensor are electrically connected to the corresponding PLC main control machine.

[0058] Specifically, the cross beam 4 is one or more H-shaped steels. See Figure 3, the crossbeam 4 is formed by welding two H-shaped steels, with higher structural strength. To further improve the strength of the crossbeam 4, stiffening plates can be welded on both sides of the H-shaped steel to reinforce the H-shaped steel.

[0059] Specifically, the connecting member 34 is an H-shaped steel, making the connection between the front load transfer reaction seat 31 and the rear load transfer reaction seat 32 firm.

[0060] Embodiment 2:

[0061] A construction method for jacking a curved beam includes the following steps:

[0062] S1. According to the distance between the permanent piers, the jacking equipment and the frame structure are respectively arranged and fixed on the permanent piers. The crossbeam is horizontally arranged on the upper end faces of the two jacking equipment. When the jacking equipment 2 does not act, the height of the upper end face of the frame structure 3 is higher than the height of the upper end face of the crossbeam 4, and the curved beam 1 is placed on the upper end face of the frame structure 3;

[0063] S2. The jacking equipment 2 is jacked up to make the crossbeam 4 contact with the curved beam 1. At this time, the curved beam 1, the crossbeam 4, and the frame structure 3 are simultaneously stressed;

[0064] S3. The jacking equipment 2 continues to be jacked up until the curved beam 1 is completely separated from the frame structure 3. At this time, the force transfer of the load is completed;

[0065] S4. The jacking equipment 2 jacks the curved beam 1 for one stroke;

[0066] S5. Load transfer reaction seat stage: The jacking equipment 2 descends, places the curved beam 1 on the upper end face of the frame structure 3, and continues to descend until the curved beam 1 is completely separated from the crossbeam 4 to complete the load transfer;

[0067] S6. Jacking equipment retraction stage: The jacking cylinder of the jacking equipment 2 retracts, and the crossbeam 4 returns to the initial stage under the action of the jacking equipment 2;

[0068] Repeat steps S2 - S6 to complete the jacking process of one design mileage of the curved beam 1;

[0069] S7. Determine the center point of the curved beam 1 through measurement and monitoring, and use the deviation correction cylinder on the jacking equipment to horizontally adjust the crossbeam 4 thereon to keep the jacking force of the curved beam balanced;

[0070] S8. Deviation correction stage: The jacking equipment 2 continues to be jacked up to the load transfer stage, and automatically corrects the deviation of the curved beam 1 for one stroke through the deviation correction cylinder of the jacking equipment;

[0071] S9. Equipment falling stage: The jacking equipment 2 descends until the curved beam 1 is completely separated from the crossbeam 4;

[0072] Repeating steps S7 - S9 can complete the repeated rectification of the curved beam 1, and finally meet the design alignment requirements of the curved beam.

[0073] Embodiment 3:

[0074] Refer to Figures 5-7 , a guiding beam 5 is provided at the port of the curved beam 1. While it can play a supporting role, it can also overcome the unbalanced counterweight structure. A quick connection method is adopted between the guiding beam 5 and the curved beam 1, which specifically includes a guiding beam docking section 6 and a box girder docking section 7; the guiding beam docking section 6 includes a guiding beam connecting part 61, the guiding beam connecting part 61 is connected to the guiding beam 5, a first guiding structure 62 is provided at the top of the guiding beam connecting part 61, a first tensioning structure 63 is provided below the first guiding structure 62 at the upper end of the guiding beam connecting part 61, and a first positioning hole 64 is provided at the lower end of the guiding beam connecting part 61; the box girder docking section 7 includes a box girder connecting part 71, the box girder connecting part 71 is connected to the curved beam 1, a second guiding structure 72 corresponding to the first guiding structure 62 for guiding is provided at the top of the box girder connecting part 71, a second tensioning structure 73 corresponding to the first tensioning structure 63 for tensioning is provided at the upper end of the box girder connecting part 71, and a second positioning hole 74 corresponding to the first positioning hole 64 is provided at the lower end of the box girder connecting part 71. During installation, the first positioning hole 64 cooperates with the corresponding second positioning hole 74 to align the lower ends of the guiding beam docking section 6 and the box girder docking section 7; through the guiding and positioning of the first guiding structure 62 and the second guiding structure 72, the upper ends of the guiding beam docking section 6 and the box girder docking section 7 are aligned; the guiding beam docking section 6 and the box girder docking section 7 are tensioned through the first tensioning structure 63 and the second tensioning structure 73 to make the guiding beam docking section 6 and the box girder docking section 7 approach each other. After approaching, the guiding beam connecting part 61 and the box girder connecting part 71 are bolt - connected and fixed, thus completing the quick connection of the guiding beam docking section 6 and the box girder docking section 7.

[0075] Through the above - mentioned structure, the quick guiding and quick positioning connection of the guiding beam can be completed, solving the problem of difficult positioning during floating crane hoisting, and having the characteristics of high efficiency and simple control.

[0076] The first guiding structure 62 and the second guiding structure 72 can be a positioning and guiding structure with a concave part and a convex part in cooperation, or circular holes can be respectively provided on the first guiding structure 62 and the second guiding structure 72, and guiding is carried out by inserting a pin shaft into the circular holes. The first tensioning structure 63 and the second tensioning structure 73 can be circular holes provided on the guiding beam connecting part 61 and the box girder connecting part 71, and tensioning and approaching are carried out through long bolts; or steel bars can be inserted into the circular holes, and a tensioning device is used for tensioning to make the guiding beam docking section 6 and the box girder docking section 7 approach each other. Preferably, the first tensioning structure 63 and the second tensioning structure 73 are in four groups, and the first positioning hole 64 and the second positioning hole 74 are in two groups.

[0077] Refer to Figure 6, both the guide beam connection part 61 and the box girder connection part 71 include butt plates 611 and rib plates 612 connected to the butt plates 611. Corresponding butt holes 613 are provided on the two butt plates 611. The butt plates 611 are used for the guide beam docking section 6 and the box girder docking section 7 to approach and dock. The rib plates 612 strengthen the structural strength of the guide beam connection part 61 and the box girder connection part 71. The butt holes 613 are located between the rib plates 612, and there is space for installing bolts between the rib plates 612. When finally approaching, bolts are installed in the butt holes 613 on both sides of the butt plates 611 to connect and fix the guide beam docking section 6 and the box girder docking section 7.

[0078] See Figure 6 , the first guiding structure 62 includes a first guiding seat 621 fixedly connected to the top of the guide beam connection part 61. A tapered structure hole 622 is provided in the first guiding seat 621. The tapered structure hole 622 can be a tapered blind hole or a tapered through hole. The second guiding structure 72 includes a second guiding seat 721 fixedly connected to the top of the box girder connection part 71. The second guiding seat 721 is provided with a connection hole 722 for connecting bolts. By installing a tapered positioning pin in the connection hole 722, the tapered head of the positioning pin extends towards the tapered structure hole 622, so that during the installation process, the guide beam docking section 6 and the box girder docking section 7 are aligned. The provision of the tapered structure hole 622 enables the guide beam docking section 6 and the box girder docking section 7 to quickly guide and approach.

[0079] See Figure 6 , both the first tensioning structure 63 and the second tensioning structure 73 include two spaced-apart vertical plates 631 connected to the butt plate 611. A cover plate 632 is provided on the two vertical plates 631. Tensioning holes 633 are coaxially provided on the cover plate 632 and the butt plate 611 respectively. During use, a threaded steel bar is inserted into the tensioning hole 633, and the threaded steel bar is tensioned by a tensioning device, so that the guide beam docking section 6 and the box girder docking section 7 approach.

[0080] See Figure 6 , the first positioning hole 64 and the second positioning hole 74 are respectively located on the butt plate 611. The guide beam docking section 6 and the box girder docking section 7 are positioned by inserting a pin shaft 8, so that the guide beam docking section 6 and the box girder docking section 7 are completely aligned, facilitating the installation of bolts in the butt holes 613.

[0081] Specific working process and principle:

[0082] S1. Docking section welding stage: Weld the guide beam 5 and the guide beam docking section 6 in the factory;

[0083] S2. Connection section welding stage: Weld the curved beam 1 (segment beam) to be jacked on site with the guide beam docking section 6;

[0084] S3. Quick positioning stage: Pass the pin shaft 8 through the second positioning hole 74, and use the pointed part of the conical structure of the pin shaft 8 to quickly position with the first positioning hole 64;

[0085] S4. Quick guiding stage: Use a floating crane to align the welded guide beam docking section 6 with the welded box girder connecting section 4. Pass a positioning pin with a cone (such as the pin shaft 8) through the connecting hole 722, and then use the conical structure hole 622 and the first guiding structure 62 for quick guiding;

[0086] S5. Tensioning and positioning stage: Pass the threaded steel through the tensioning holes 633 of the first tensioning structure 63 and the second tensioning structure 73 for connection and positioning, and use the tensioning equipment to complete the tensioning;

[0087] S6. Full connection stage: Install bolts in the docking holes 613 of the docking plate 611 to connect the guide beam docking section 6 and the box girder docking section 7, and complete the quick connection of the guide beam 5 and the curved beam 1.

[0088] Through the guiding structure and the tensioning structure, the positioning holes can complete the quick guiding and quick positioning connection between the guide beam and the box girder, solve the problem of difficult positioning during the floating crane hoisting, and have the characteristics of high efficiency and simple control; through the first guiding structure and the second guiding structure, the conical structure hole is arranged in the first guiding seat, so that the guide beam docking section and the box girder docking section can quickly guide and approach; through the first tensioning structure and the second tensioning structure, insert the threaded steel into the tensioning hole, and use the tensioning equipment to tension the threaded steel, so that the guide beam docking section and the box girder docking section approach; the first positioning hole and the second positioning hole make the guide beam docking section and the box girder docking section completely aligned, which is convenient for installing bolts in the docking hole.

[0089] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A construction method for incremental launching of a curved beam, including an incremental launching device (2), characterized in that: The jacking equipment (2) is installed inside the frame structure (3), and the cross beam (4) is arranged on the top of the jacking equipment (2); the frame structure (3) includes a front load conversion reaction seat (31) and a rear load conversion reaction seat (32), and the front load conversion reaction seat (31) and the rear load conversion reaction seat (32) are connected and fixed by a connecting piece (34), and the jacking equipment (2) is installed between the front load conversion reaction seat (31) and the rear load conversion reaction seat (32); in the use state, jacking equipment (2) and frame structures (3) are arranged on both sides of the lower part of the curved beam (1), and the cross beam (4) is installed on the jacking equipment (2) on both sides; The method includes the following steps: S1. According to the distance between the permanent piers, the jacking equipment (2) and the frame structure (3) are respectively arranged and fixed on the permanent piers, the cross beam (4) is transversely arranged on the upper end surfaces of the two jacking equipment (2), when the jacking equipment (2) does not act, the height of the upper end surface of the frame structure (3) is higher than the height of the upper end surface of the cross beam (4), and the curved beam (1) is placed on the upper end surface of the frame structure (3); S2. The jacking equipment (2) is jacked up so that the cross beam (4) contacts the curved beam (1), and at this time, the curved beam (1), the cross beam (4) and the frame structure (3) are simultaneously stressed; S3. The jacking equipment (2) continues to be jacked up until the curved beam (1) is completely separated from the frame structure (3), and at this time, the force conversion of the load is completed; S4. The jacking equipment (2) jacks the curved beam (1) for one stroke; S5. Load conversion reaction seat stage: The jacking equipment (2) descends, places the curved beam (1) on the upper end surface of the frame structure (3), and continues to descend until the curved beam (1) is completely separated from the cross beam (4), and the load conversion is completed; S6. Jacking equipment retraction stage: The jacking cylinder of the jacking equipment (2) retracts, and the cross beam (4) returns to the initial stage under the action of the jacking equipment (2); Repeat steps S2 - S6 to complete the jacking process of one design mileage of the curved beam (1); S7. Determine the center point of the curved beam (1) through measurement and monitoring, and use the deviation correction cylinder on the jacking equipment (2) to horizontally adjust the cross beam (4) thereon to keep the jacking force of the curved beam (1) balanced; S8. Deviation correction stage: The jacking equipment (2) continues to be jacked up to the load conversion stage, and the curved beam (1) is automatically corrected for one stroke through the deviation correction cylinder of the jacking equipment; S9. Equipment falling stage: The jacking equipment (2) falls until the curved beam (1) is completely separated from the cross beam (4); Repeat steps S7 - S9 to complete the repeated deviation correction of the curved beam (1) and finally meet the design alignment requirements of the curved beam.

2. The incremental launching construction method of a curved beam according to claim 1, characterized in that: Both the front load conversion reaction seat (31) and the rear load conversion reaction seat (32) include two columns (311), the tops of the two columns (311) are connected with a support seat (312), and multiple connecting pieces (34) are respectively connected to the columns (311).

3. A method for jacking construction of a curved beam according to claim 1, characterized in that: One side or both sides of the front load conversion reaction seat (31) and the rear load conversion reaction seat (32) are provided with an extension structure (33) for extending the upper end stress surface of the frame structure (3).

4. A construction method for jacking a curved beam according to claim 1, characterized in that: An inclination sensor is provided on the cross beam (4).

5. A method for jacking construction of a curved beam according to claim 1, characterized in that: The pushing device (2) includes a jacking oil cylinder for jacking up the steel box girder, a horizontal pushing oil cylinder for pushing the steel box girder to the target position, and a deviation rectifying oil cylinder.

6. The incremental launching construction method for a curved girder according to claim 5, characterized in that: A plurality of force sensors are installed on both sides of the upper end surface of the jacking oil cylinder in the pushing device (2).

7. A method for jacking and launching construction of a curved beam according to claim 1, characterized in that: A guide beam (5) is provided at the port of the curved beam (1), and a quick connection method is adopted between the guide beam (5) and the curved beam (1).

8. A method for jacking construction of a curved beam according to claim 7, characterized in that: The quick connection method specifically includes a guide beam docking section (6) and a box girder docking section (7); the guide beam docking section (6) includes a guide beam connection part (61), a first guiding structure (62) is provided at the top of the guide beam connection part (61), a first tensioning structure (63) is provided below the first guiding structure (62) at the upper end of the guide beam connection part (61), and a first positioning hole (64) is provided at the lower end of the guide beam connection part (61); the box girder docking section (7) includes a box girder connection part (71), a second guiding structure (72) corresponding to the first guiding structure (62) for guiding is provided at the top of the box girder connection part (71), a second tensioning structure (73) corresponding to the first tensioning structure (63) for tensioning is provided at the upper end of the box girder connection part (71), and a second positioning hole (74) corresponding to the first positioning hole (64) is provided at the lower end of the box girder connection part (71).

9. A method for incremental launching construction of a curved beam according to claim 8, characterized in that: Both the guide beam connection part (61) and the box girder connection part (71) include a docking plate (611) and a rib plate (612) connected to the docking plate (611), and corresponding docking holes (613) are provided on the two docking plates (611). The first guiding structure (62) includes a first guiding seat (621) fixedly connected to the top of the guide beam connection part (61), and a conical structure hole (622) is provided in the first guiding seat (621). The second guiding structure (72) includes a second guiding seat (721) fixedly connected to the top of the box girder connection part (71), and a connection hole (722) for connecting bolts is provided in the second guiding seat (721). Both the first tensioning structure (63) and the second tensioning structure (73) include two spaced vertical plates (631) connected to the docking plate (611), a cover plate (632) is provided on the two vertical plates (631), and tensioning holes (633) are coaxially provided on the cover plate (632) and the docking plate (611) respectively; the first positioning hole (64) and the second positioning hole (74) are respectively located on the docking plate (611), and the guide beam docking section (6) and the box girder docking section (7) are positioned by inserting a pin shaft (8).

Images