Bridge active bearing mounting device and mounting method thereof

Abstract

The invention provides a bridge active bearing installation device and an installation method thereof.The bridge active bearing installation device comprises a bearing platform, new pile foundations are arranged on the two sides of the bearing platform, a staddle device is arranged at the tops of the new pile foundations, reaction frames are arranged on the staddle device, a plurality of steel bars are arranged between the two reaction frames, and the staddle device comprises a movable bearing platform; a lifting positioning device and two mounting boxes are arranged on the bearing platform, the lifting positioning device comprises two rotary tables, and a plurality of arc-shaped grooves are formed in the rotary tables. Compared with rear-mounted counter-force pre-pressing, the device adopts front-mounted pre-stress of the counter-force frame, so that the poured expanded bearing platform is stable in structure, clear in force transmission path, visible and controllable in pressure applying condition, and the condition of pressure loss is not easy to occur. The bearing frame device can conduct horizontal and longitudinal movement adjustment and lifting adjustment, and the bearing frame device can clamp and convey the reaction frame and the multiple steel bars, so that when the bearing frame device is used for installing the reaction frame and the multiple steel bars, the bearing frame device can make the reaction frame and the multiple steel bars be accurately installed in a butt joint mode.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to an active load-bearing installation device for a bridge and an installation method thereof. Background Art

[0002] The bridge reinforcement and reconstruction construction generally adopts the post-installation method, that is, a gap is reserved directly above the newly added pile foundation to isolate it from the pedestal. After the expanded pedestal is poured, a jack is used to apply a reaction force in the reserved gap between the newly added pile foundation and the pedestal to achieve active bearing of the newly added pile foundation. The post-installed active bearing system usually has the problems of poor structural stability and weak durability. The post-installed active bearing system applies the reaction force and then pours the reserved gap concrete. The reserved gap concrete is difficult to pour densely, and the later shrinkage creep will cause the loss of construction reaction force; the connection between the newly added pile foundation and the pedestal is poor in integrity and is prone to stress concentration, which poses certain quality risks in the later stage.

[0003] At the same time, some people solve this problem by installing a reaction frame. The reaction frame structure requires the steel bars to be manually installed on the casing first, and then the reaction frame is installed on the pier, and the reaction frame is connected to the steel bars. However, the space at the bottom of the bearing platform is small, and it is difficult to manually install the steel bars, which is time-consuming and labor-intensive. Not only do the steel bars not need to be inserted one by one into the reserved holes in the casing, but the construction time is also long; the steel bars are difficult to position, and it is difficult for multiple steel bars to accurately penetrate the casing. At the same time, during the connection process between the existing reaction frame and the steel bars, the reaction frame and the steel bars are difficult to adjust to each other, and the steel bars are difficult to pass through the reserved holes on the reaction frame, which makes the installation process of the reaction frame and the steel bars very difficult, affecting the project progress and installation quality. For this reason, we propose a bridge active load-bearing installation device and an installation method thereof to solve the above problems. Summary of the invention

[0004] The present invention provides a bridge active load-bearing installation device and an installation method thereof, which solve the problems that a post-type active load-bearing system usually has poor structural stability and weak durability; the connection integrity between the post-added pile foundation and the pedestal is poor, and stress concentration is easily generated, and there are certain quality risk hazards in the later stage.

[0005] Another problem solved by the present invention is that the space at the bottom of the bearing platform is small, manual installation of steel bars is difficult and time-consuming; the installation of a single steel bar is time-consuming; the steel bar cannot be accurately positioned when installed on the casing; when the reaction frame and the steel bar are connected to the holes, it is difficult to adjust each other, making the installation of the reaction frame difficult.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a bridge active load-bearing installation device and an installation method thereof, including a bearing platform, new pile foundations are arranged on both sides of the bearing platform, a bearing frame device is arranged on the top of the new pile foundation, a reaction frame is arranged on the bearing frame device, a plurality of steel bars are arranged between the two reaction frames, the bearing frame device includes a movable bearing platform, a lifting and positioning device and two installation boxes are arranged on the bearing platform, the lifting and positioning device includes two rotating turntables, and a plurality of arc grooves are arranged on the turntables.

[0007] In a preferred solution, a plurality of pile foundations are provided at the bottom of the bearing platform, casings are provided on the pile foundations, steel bars penetrate through the through holes on the casings, and the steel bars are located at the bottom of the bearing platform.

[0008] In the preferred scheme, the reaction frame includes a diagonal brace, a cross bar is provided at the bottom of the diagonal brace, a distribution beam is provided at the bottom of the cross bar, a cross beam is provided at one end of the cross bar, a plurality of second through holes are provided on the cross beam, steel bars pass through the second through holes, a plurality of anchor bars are provided at one end of the diagonal brace, and the anchor bars are connected to the bearing platform.

[0009] In the preferred solution, the support device includes a moving platform, a longitudinal groove is provided on the new pile foundation, both ends of the moving platform are against the longitudinal groove, a first threaded hole is provided on the moving platform, a second screw rod is provided on the first threaded hole, a second motor is provided at one end of the second screw rod, and a slide groove is provided on the top of the moving platform.

[0010] In the preferred solution, side grooves are provided at the four corners of the base, a second threaded hole is provided on the base, a plurality of outer sleeves are provided on the top of the base, and the driving device includes a first screw rod, the first screw rod is connected to the second threaded hole, a first screw rod is provided at one end of the first screw rod, and the first screw rod is installed on the moving platform.

[0011] In a preferred solution, the lifting and positioning device includes a plurality of inner cylinders, the inner cylinders abut against the outer cylinders, and the lifting and positioning device includes two side platforms, the side platforms are rotatably connected to the turntable, and a cylinder is provided between the side platforms and the turntable.

[0012] In the preferred solution, one end of one of the turntables is provided with a round chamfer, one end of the arc groove is provided with a thumb cylinder, the other end of the arc groove is provided with a second thumb cylinder, the second thumb cylinder is provided with a push cylinder, and the push cylinder is installed on the turntable.

[0013] In the preferred solution, a second jack is provided on the installation box, one end of the second jack is connected to the rotating shaft at the bottom of the lifting fork frame, both ends of the installation box are against the side grooves, a plurality of first jacks are provided on the supporting platform, and a plurality of support pads are installed at the bottom of the reaction frame.

[0014] A method for installing an active load-bearing installation device for a bridge, characterized by: S1, assembling a reaction frame: connecting a distribution beam, a crossbar and a crossbeam, and installing a plurality of anchor bars on the diagonal brace; S2. Use a crane to lift the support device to the top of the new pile foundation, and use the crane to place multiple steel bars on the top of the lifting and positioning device; S3, steel bar clamping: open multiple thumb cylinders and the second thumb cylinder, and after each steel bar is placed in the arc groove, the thumb cylinder and the second thumb cylinder clamp multiple steel bars; S4, positioning of the steel bar group: the second thumb cylinder is released, the push cylinder moves back and then the second thumb cylinder is clamped, the thumb cylinder is opened, and the push cylinder moves forward to move the steel bar group forward until the steel bar moves to the vicinity of the casing, the horizontal and longitudinal positions of the cap are driven, the horizontal and longitudinal positions of the steel bar group are adjusted, the lifting fork frame is driven, and the height of the steel bar group is adjusted; S5, steel bar group installation: drive the driving device to make the steel bar group pass through the casing; S6. The reaction frame is installed on the lifting and positioning device: open the two turntables, and the crane lifts the reaction frame between the two opened turntables, and drives the cylinder close to the side of the bearing platform to slowly close the corresponding turntable, so that the turntable pushes the distribution beam against the side platform, so that the reaction frame is connected to the lifting and positioning device; S7. Installation of reaction frame: adjusting the horizontal and longitudinal position of the cap, adjusting the horizontal and longitudinal position height of the cap, and driving the driving device so that the steel bar passes through the second through hole on the beam; S8, pre-stressing the load-bearing platform: drive the first jack to make the reaction frame reach the expected force, install multiple pads at the bottom of the reaction frame, and lower the lifting and positioning device; S9. Outsourcing casting of new cap: Outsourcing casting of new cap includes bearing platform, reaction frame and some supports. After casting is completed, remove the uncast supports at the bottom and remove the frame device.

[0015] The beneficial effects of the present invention are as follows: the structure of the device is stable and the force is clear: compared with the post-type reaction force preloading, the device adopts the front-type preloading of the reaction force frame to make the expanded platform structure after pouring stable, the force transmission path is clear, the pressure application is visible and controllable, and pressure loss is not easy to occur.

[0016] The device is stressed as a whole and has good durability: the device has been pre-loaded with design pressure before the new concrete is poured. The new pile foundation is normally connected to the expanded cap and intertwined with each other. After the expanded cap is poured, the device is fully poured in the expanded cap concrete to isolate the device from the external environment and has good durability.

[0017] This device makes full use of the advantages of different materials: the main compression connection points of the upper diagonal brace of this device are connected by anchor bars drilled in the cap concrete, making full use of the compressive properties of concrete. The horizontal tension of this device is connected by steel bars of fine-rolled threaded steel, making full use of the tensile properties of steel to avoid the concrete structure being damaged by the tensile force of the concrete embedded bars.

[0018] The support device can be adjusted for horizontal and longitudinal movement, the lifting and positioning device can be adjusted for lifting, and the support device can clamp and transport the reaction frame and multiple steel bars, so that when the support device installs the reaction frame and multiple steel bars, the support device can accurately dock and install them.

[0019] The push cylinder, thumb cylinder and second thumb cylinder on the lifting and positioning device are used together to enable the overall structure to clamp the steel bars and transport the steel bars at the same time, so that multiple steel bars can be accurately positioned and sent into the reserved holes of the casing. If there are many longitudinal reserved holes in the casing, the turntable can be turned 90°, and the turntable will show multiple steel bars installed in a vertical row. The lifting and positioning device can adapt to the horizontal reserved holes or longitudinal reserved holes of the casing to adjust the installation method, further speeding up the construction progress.

[0020] The two turntables of the lifting and positioning device can be flipped relative to the side platform. When one of the side platforms is opened and the other side platform is closed, the reaction frame can be installed on the lifting and positioning device, and the closed side platform can be slowly flipped so that the side platform pushes the distribution beam of the reaction frame, so that one side of the distribution beam rests on the side platform, and the other side of the distribution beam rests on the end of the flipped side platform, thereby realizing the positioning of the reaction frame.

[0021] The turntable on one side of the distribution beam can be opened so that multiple first jacks can be set at the bottom of the corresponding turntable to load prestress at the bottom of the lifting and positioning device. After the overall device is installed, the other turntable can be opened to add supports at the bottom of the cross bar. After lowering the height of the lifting and positioning device, the newly cast expanded platform is not connected to the frame device, so that the frame device can be reused, which has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments; Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a top view of the local structure of the present invention; Figure 3 is an axonometric view of the support device of the present invention; Figure 4 is a front view of the support device of the present invention; Figure 5 It is an axonometric view of a local structure of the present invention; Figure 6 is an axonometric view of the lifting and positioning device of the present invention; Figure 7 is a front view of the lifting and positioning device of the present invention; Figure 8 The present invention Figure 7 A magnified view of center A; Fig. 9 It is a front view of the reaction frame of the present invention resting against the lifting and positioning device; Fig.10 The present invention Fig. 9 Magnified view of middle B; Fig.11 It is a front view of a plurality of support pads installed at the bottom of the reaction frame of the present invention; Fig.12 It is an axonometric view of a local structure of the present invention; In the figure: a support frame device 1; a reaction frame 2; a diagonal brace 201; an anchor bar 202; a distribution beam 203; a cross bar 204; a cross beam 205; a moving platform 3; a first threaded hole 301; a slide groove 302; a bearing platform 4; a side groove 401; a second threaded hole 402; an outer sleeve 403; a lifting and positioning device 5; an inner cylinder 501; a lifting fork frame 502; a side platform 503; a turntable 504; a round chamfer 5041; an arc groove 505; a cylinder 506; a push cylinder 507; an installation box 6; a driving device 7; a first motor 701; a first screw rod 702; a first jack 8; a second jack 9; a thumb cylinder 10; a steel bar 11; a pile foundation 12; a new pile foundation 13; a bearing platform 14; a casing 15; and a support pad 16. DETAILED DESCRIPTION

[0023] Embodiment 1: like Figure 1-12 In the invention, a bridge active bearing installation device and an installation method thereof are provided, including a bearing platform 14, new pile foundations 13 are arranged on both sides of the bearing platform 14, a bearing frame device 1 is arranged on the top of the new pile foundation 13, a reaction frame 2 is arranged on the bearing frame device 1, a plurality of steel bars 11 are arranged between the two reaction frames 2, the bearing frame device 1 includes a movable cap 4, a lifting and positioning device 5 and two installation boxes 6 are arranged on the cap 4, the lifting and positioning device 5 includes two rotating turntables 504, and a plurality of arc grooves 505 are arranged on the turntables 504. With this structure, the structure of the device is stable and the force is clear: compared with the post-type reaction preloading, the device adopts the front-type preloading of the reaction frame 2 to make the expanded cap structure after pouring stable, the force transmission path is clear, the pressure application situation is visible and controllable, and the pressure loss situation is not easy to occur.

[0024] The device is stressed as a whole and has good durability: the device has been pre-loaded with design pressure before the new concrete is poured. The new pile foundation 13 is normally connected to the expanded cap and interlaced with each other. After the expanded cap is poured, the device has good integrity. After the device is installed, it is poured entirely in the expanded cap concrete to isolate the device from the external environment and has good durability.

[0025] The device makes full use of the advantages of different materials: the main compression connection point of the upper diagonal brace of the device is connected by the anchor bar 202 drilled in the cap concrete, making full use of the compressive properties of concrete. The horizontal tension of the device is connected by the steel bar 11 of the precision-rolled threaded steel bar, making full use of the tensile properties of the steel material to avoid the concrete anchor bar being tensile and damaging the concrete structure.

[0026] The support device 1 can be adjusted for horizontal and longitudinal movement, the lifting and positioning device 5 can be adjusted for lifting, and the support device 1 can clamp and transport the reaction frame 2 and multiple steel bars 11, so that when the support device 1 installs the reaction frame 2 and multiple steel bars 11, the support device 1 can accurately dock and install them.

[0027] The push cylinder 507, thumb cylinder 10 and second thumb cylinder on the lifting and positioning device 5 are used in cooperation, so that the overall structure can clamp the steel bar 11 and convey the steel bar 11 at the same time, so that multiple steel bars 11 can be accurately positioned and delivered into the reserved holes of the casing 15. If there are many longitudinal reserved holes of the casing 15, the turntable 504 can be turned over 90 degrees, and the turntable 504 presents multiple steel bars 11 installed in a longitudinal row. The lifting and positioning device 5 can adapt to the transverse reserved holes or longitudinal reserved holes of the casing 15 to adjust the installation method, further speeding up the construction progress.

[0028] The two turntables 504 of the lifting and positioning device 5 can be flipped relative to the side platform 503. When one of the side platforms 503 is opened and the other side platform 503 is closed, the reaction frame 2 can be installed on the lifting and positioning device 5, and the closed side platform 503 can be slowly flipped so that the side platform 503 pushes the distribution beam 203 of the reaction frame 2, so that one side of the distribution beam 203 rests on the side platform 503, and the other side of the distribution beam 203 rests on the end of the flipped side platform 503, thereby realizing the positioning of the reaction frame 2.

[0029] The turntable 504 on one side of the distribution beam 203 can be opened so that a plurality of first jacks 8 can be arranged at the bottom of the corresponding turntable 504 so that prestress can be loaded at the bottom of the lifting and positioning device 5. After the installation of the entire device is completed, the other turntable 504 can be opened so that a support pad 16 can be added to the bottom of the cross bar 204. After the height of the lifting and positioning device 5 is lowered, the newly cast expanded platform is not connected to the support device 1, so that the support device 1 can be reused.

[0030] In the preferred solution, a plurality of pile foundations 12 are provided at the bottom of the bearing platform 14, a casing 15 is provided on the pile foundation 12, and a steel bar 11 passes through the through hole on the casing 15, and the steel bar 11 is located at the bottom of the bearing platform 14. With this structure, the connection point where the upper diagonal brace of the reaction frame 2 is mainly subjected to pressure is connected by the anchor bar 202 bored in the concrete of the bearing platform, making full use of the pressure resistance of the concrete. The horizontal tension of the device is connected by the steel bar 11 of the finely rolled threaded steel bar, making full use of the tensile property of the steel material, and avoiding the concrete structure being damaged by the tensile force of the concrete embedded steel bar.

[0031] In the preferred solution, the reaction frame 2 includes a diagonal brace 201, a cross bar 204 is provided at the bottom of the diagonal brace 201, a distribution beam 203 is provided at the bottom of the cross bar 204, a cross beam 205 is provided at one end of the cross bar 204, a plurality of second through holes are provided on the cross beam 205, the steel bar 11 passes through the second through holes, and a plurality of anchor bars 202 are provided at one end of the diagonal brace 201, and the anchor bars 202 are connected to the bearing platform 14. With this structure, the device has a stable structure and clear force: compared with the post-type reaction preloading, the device adopts the front-type preloading of the reaction frame 2 to make the expanded platform structure after pouring stable, the force transmission path is clear, the pressure applied can be seen and controlled, and it is not easy to have pressure loss.

[0032] The device is stressed as a whole and has good durability: the device has been pre-loaded with design pressure before the new concrete is poured. The new pile foundation 13 is normally connected to the expanded cap and interlaced with each other. After the expanded cap is poured, the device has good integrity. After the device is installed, it is poured entirely in the expanded cap concrete to isolate the device from the external environment and has good durability.

[0033] In a preferred solution, the support device 1 includes a moving platform 3, a longitudinal groove is provided on the new pile foundation 13, two ends of the moving platform 3 abut against the longitudinal groove, a first threaded hole 301 is provided on the moving platform 3, a second screw rod is provided on the first threaded hole 301, a second motor is provided at one end of the second screw rod, and a slide groove 302 is provided on the top of the moving platform 3. With this structure, a longitudinal groove is provided on the new pile foundation 13, and two ends of the moving platform 3 abut against the longitudinal groove. The second motor is driven to rotate the second screw rod, so that the moving platform 3 slides relative to the new pile foundation 13 to adjust the longitudinal position of the moving platform 3.

[0034] In the preferred solution, side grooves 401 are provided at the four corners of the support platform 4, a second threaded hole 402 is provided on the support platform 4, a plurality of outer sleeves 403 are provided on the top of the support platform 4, and the driving device 7 includes a first screw rod 702, the first screw rod 702 is connected to the second threaded hole 402, a first screw rod 702 is provided at one end of the first screw rod 702, and the first screw rod 702 is installed on the moving platform 3. According to this structure, the first motor 701 of the driving device 7 is driven to rotate the first screw rod 702 to move the support platform 4 to adjust the horizontal position of the lifting and positioning device 5.

[0035] In a preferred solution, the lifting and positioning device 5 includes a plurality of inner cylinders 501, the inner cylinders 501 abut against the outer cylinder 403, and the lifting and positioning device 5 includes two side platforms 503, the side platforms 503 are rotatably connected to the turntable 504, and a cylinder 506 is provided between the side platforms 503 and the turntable 504. With this structure, the second jack 9 on the installation box 6 is driven to lift the lifting fork frame 502 to adjust the height of the top of the lifting and positioning device 5.

[0036] The push cylinder 507, thumb cylinder 10 and second thumb cylinder on the lifting and positioning device 5 are used in cooperation, so that the overall structure can clamp the steel bar 11 and convey the steel bar 11 at the same time, so that multiple steel bars 11 can be accurately positioned and delivered into the reserved holes of the casing 15. If there are many longitudinal reserved holes of the casing 15, the turntable 504 can be turned over 90 degrees, and the turntable 504 presents multiple steel bars 11 installed in a longitudinal row. The lifting and positioning device 5 can adapt to the transverse reserved holes or longitudinal reserved holes of the casing 15 to adjust the installation method, further speeding up the construction progress.

[0037] In the preferred solution, one end of one of the turntables 504 is provided with a round chamfer 5041, one end of the arc groove 505 is provided with a thumb cylinder 10, and the other end of the arc groove 505 is provided with a second thumb cylinder, and the second thumb cylinder is provided with a push cylinder 507, and the push cylinder 507 is installed on the turntable 504. According to this structure, a connected cylindrical groove is provided at the bottom of the arc groove 505, and the push cylinder 507 is installed on the cylindrical groove. One end of the push cylinder 507 is connected to the second thumb cylinder, and the bottom of the second thumb cylinder is located in the cylindrical groove, and the top of the second thumb cylinder is located on the arc groove 505. The push cylinder 507 is driven to slide the second thumb cylinder relative to the arc groove 505. The thumb cylinder 10 is fixed relative to the arc groove 505. The steel bar 11 abuts against the arc groove 505. The second thumb cylinder has the same structure as the thumb cylinder 10.

[0038] Clamping the steel bars 11: Open the multiple thumb cylinders 10 and the second thumb cylinder, and after each steel bar 11 is placed in the arc groove 505, the thumb cylinder 10 and the second thumb cylinder clamp the multiple steel bars 11; Positioning of the steel bar 11 group: the second thumb cylinder is loosened, the push cylinder 507 moves back, and then the second thumb cylinder is clamped, the thumb cylinder 10 is opened, and the push cylinder 507 moves forward to move the steel bar 11 group forward until the steel bar 11 moves to the vicinity of the casing 15. The overall structure can transport and position multiple steel bars 11.

[0039] The push cylinder 507, thumb cylinder 10 and second thumb cylinder on the lifting and positioning device 5 are used in cooperation, so that the overall structure can clamp the steel bar 11 and convey the steel bar 11 at the same time, so that multiple steel bars 11 can be accurately positioned and delivered into the reserved holes of the casing 15. If there are many longitudinal reserved holes of the casing 15, the turntable 504 can be turned over 90 degrees, and the turntable 504 presents multiple steel bars 11 installed in a longitudinal row. The lifting and positioning device 5 can adapt to the transverse reserved holes or longitudinal reserved holes of the casing 15 to adjust the installation method, further speeding up the construction progress.

[0040] In the preferred solution, the second jack 9 is provided on the installation box 6, one end of the second jack 9 is connected to the rotating shaft at the bottom of the lifting fork frame 502, the two ends of the installation box 6 are against the side groove 401, the support platform 4 is provided with multiple first jacks 8, and multiple support pads 16 are installed at the bottom of the reaction frame 2. With this structure, the turntable 504 on one side of the distribution beam 203 can be opened, so that multiple first jacks 8 can be set at the bottom of the corresponding turntable 504, so that prestress can be loaded at the bottom of the lifting and positioning device 5. After the installation of the entire device is completed, the other turntable 504 can be opened, so that the support pad 16 can be added to the bottom of the crossbar 204, and after the height of the lifting and positioning device 5 is lowered, the newly cast enlarged platform is not connected to the support device 1, so that the support device 1 can be reused.

[0041] Embodiment 2: Further description in conjunction with Example 1: A method for installing a bridge active load-bearing installation device, characterized in that: S1, assembling the reaction frame 2: connecting the distribution beam 203, the cross bar 204 and the cross beam 205, and installing a plurality of anchor bars 202 on the diagonal brace 201; S2, hoist the support device 1 to the top of the new pile foundation 13 by a crane, and place multiple steel bars 11 on the top of the lifting and positioning device 5 by a crane; S3, clamping the steel bars 11: opening the plurality of thumb cylinders 10 and the second thumb cylinder, and after each steel bar 11 is placed in the arc groove 505, the thumb cylinder 10 and the second thumb cylinder clamp the plurality of steel bars 11; S4, positioning of the steel bar group 11: the second thumb cylinder is released, the push cylinder 507 is moved back and then the second thumb cylinder is clamped, the thumb cylinder 10 is opened, and the push cylinder 507 is moved forward to move the steel bar group 11 forward until the steel bar 11 moves to the vicinity of the casing 15, the horizontal and longitudinal positions of the cap 4 are driven, the horizontal and longitudinal positions of the steel bar group 11 are adjusted, and the lifting fork frame 502 is driven to adjust the height of the steel bar group 11; S5, installation of the steel bar group 11: driving the driving device 7 to allow the steel bar group 11 to penetrate the casing 15; S6. The reaction frame 2 is installed on the lifting and positioning device 5: the two turntables 504 are opened, and the crane lifts the reaction frame 2 between the two opened turntables 504, and drives the cylinder 506 close to the side of the bearing platform 14 to slowly close the corresponding turntable 504, so that the turntable 504 pushes the distribution beam 203 against the side platform 503, so that the reaction frame 2 is connected to the lifting and positioning device 5; S7, installation of the reaction frame 2: adjusting the horizontal and longitudinal positions of the cap 4, adjusting the horizontal and longitudinal heights of the cap 4, and driving the driving device 7 to allow the steel bar 11 to pass through the second through hole on the beam 205; S8, pre-stressing the bearing platform 14: driving the first jack 8 to make the reaction frame 2 reach the expected force, installing multiple support pads 16 at the bottom of the reaction frame 2, and lowering the lifting and positioning device 5; S9. Outsourcing the casting of the new cap: The outsourcing casting of the new cap includes the bearing platform 14, the reaction frame 2 and part of the support pads 16. After the casting is completed, the support pads 16 that have not been cast at the bottom are removed and the frame device 1 is removed.

[0042] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A bridge active load-bearing installation device, characterized in that: The invention comprises a bearing platform (14), new pile foundations (13) are arranged on both sides of the bearing platform (14), a bearing frame device (1) is arranged on the top of the new pile foundation (13), a reaction frame (2) is arranged on the bearing frame device (1), a plurality of steel bars (11) are arranged between the two reaction frames (2), the bearing frame device (1) comprises a movable bearing platform (4), a lifting and positioning device (5) and two installation boxes (6) are arranged on the bearing platform (4), the lifting and positioning device (5) comprises two rotating turntables (504), and a plurality of arc grooves (505) are arranged on the turntable (504).

2. According to claim 1, a bridge active load-bearing installation device is characterized by: A plurality of pile foundations (12) are provided at the bottom of the bearing platform (14), a casing (15) is provided on the pile foundation (12), a steel bar (11) passes through a through hole on the casing (15), and the steel bar (11) is located at the bottom of the bearing platform (14).

3. According to claim 1, the active load-bearing installation device for a bridge is characterized by: The reaction frame (2) comprises an oblique brace (201), a cross bar (204) is provided at the bottom of the oblique brace (201), a distribution beam (203) is provided at the bottom of the cross bar (204), a cross beam (205) is provided at one end of the cross bar (204), a plurality of second through holes are provided on the cross beam (205), the steel bars (11) pass through the second through holes, a plurality of anchor bars (202) are provided at one end of the oblique brace (201), and the anchor bars (202) are connected to the bearing platform (14).

4. According to claim 1, the active load-bearing installation device for a bridge is characterized by: The support frame device (1) comprises a moving platform (3), a longitudinal groove is provided on the new pile foundation (13), two ends of the moving platform (3) are against the longitudinal groove, a first threaded hole (301) is provided on the moving platform (3), a second screw rod is provided on the first threaded hole (301), a second motor is provided at one end of the second screw rod, and a slide groove (302) is provided on the top of the moving platform (3).

5. According to claim 1, the active load-bearing installation device for a bridge is characterized by: Side grooves (401) are provided at the four corners of the support platform (4), a second threaded hole (402) is provided on the support platform (4), a plurality of outer sleeves (403) are provided on the top of the support platform (4), and the driving device (7) comprises a first screw rod (702), the first screw rod (702) is connected to the second threaded hole (402), a first screw rod (702) is provided at one end of the first screw rod (702), and the first screw rod (702) is installed on the moving platform (3).

6. According to claim 1, the active load-bearing installation device for a bridge is characterized by: The lifting and positioning device (5) comprises a plurality of inner cylinders (501), the inner cylinders (501) being against the outer cylinder (403), and the lifting and positioning device (5) comprises two side platforms (503), the side platforms (503) being rotatably connected to the rotating table (504), and a cylinder (506) being provided between the side platforms (503) and the rotating table (504).

7. According to claim 6, a bridge active load-bearing installation device is characterized in that: A turntable (504) is provided with a round chamfer (5041) at one end, a thumb cylinder (10) is provided at one end of the arc groove (505), a second thumb cylinder is provided at the other end of the arc groove (505), a push cylinder (507) is provided on the second thumb cylinder, and the push cylinder (507) is mounted on the turntable (504).

8. According to claim 1, the active load-bearing installation device for a bridge is characterized by: A second jack (9) is provided on the installation box (6), one end of the second jack (9) is connected to the rotating shaft at the bottom of the lifting fork frame (502), both ends of the installation box (6) are against the side groove (401), a plurality of first jacks (8) are provided on the support platform (4), and a plurality of support pads (16) are installed at the bottom of the reaction frame (2).

9. A method for installing a bridge active load-bearing installation device according to any one of claims 1 to 8, characterized in that: S1, assembly of reaction frame (2): connecting distribution beam (203), cross bar (204) and cross beam (205), and installing multiple anchor bars (202) on the diagonal brace (201); S2, hoisting the support device (1) to the top of the new pile foundation (13) by a crane, and placing a plurality of steel bars (11) on the top of the lifting and positioning device (5) by a crane; S3, clamping the steel bars (11): opening the plurality of thumb cylinders (10) and the second thumb cylinder, and after each steel bar (11) is placed in the arc-shaped groove (505), the thumb cylinder (10) and the second thumb cylinder clamp the plurality of steel bars (11); S4, positioning of the steel bar (11) group: the second thumb cylinder is released, the push cylinder (507) is moved back, and then the second thumb cylinder is clamped, the thumb cylinder (10) is opened, and the push cylinder (507) is moved forward to move the steel bar (11) group forward until the steel bar (11) moves to the vicinity of the casing (15), the horizontal and longitudinal positions of the bearing platform (4) are driven, the horizontal and longitudinal positions of the steel bar (11) group are adjusted, and the lifting fork frame (502) is driven to adjust the height of the steel bar (11) group; S5, installation of the steel bar (11) group: driving the driving device (7) to allow the steel bar (11) group to penetrate the casing (15); S6. The reaction frame (2) is installed on the lifting and positioning device (5): the two turntables (504) are opened, and the crane lifts the reaction frame (2) between the two opened turntables (504), and drives the cylinder (506) close to the side of the bearing platform (14) to slowly close the corresponding turntable (504), so that the turntable (504) pushes the distribution beam (203) against the side platform (503), so that the reaction frame (2) is connected to the lifting and positioning device (5); S7, installation of the reaction frame (2): adjusting the horizontal and longitudinal positions of the cap (4), adjusting the horizontal and longitudinal heights of the cap (4), and driving the driving device (7) to allow the steel bar (11) to pass through the second through hole on the crossbeam (205); S8, pre-stressing the bearing platform (14): driving the first jack (8) to make the reaction frame (2) reach the expected force, installing a plurality of support pads (16) at the bottom of the reaction frame (2), and lowering the lifting and positioning device (5); S9. Outsourcing the casting of the new cap: The outsourcing casting of the new cap includes the bearing platform (14), the reaction frame (2) and part of the support pad (16). After the casting is completed, the support pad (16) that has not been cast at the bottom is removed and the frame device (1) is removed.

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