Construction device for overall quick dismantling of long-span prestressed tied-arch bridge by double-machine floating crane

Abstract

The application discloses a kind of double machine floating crane integral quick dismantling large-span prestressed tie-arch bridge construction device, including base, the outer wall of the base is provided with lifting seat, the outer wall of the lifting seat is provided with connecting frame, the outer wall of the connecting frame is provided with roof beam assembly, the outer wall of the lifting seat is provided with mechanical arm, and one end of the mechanical arm is provided with lifting and moving component;The roof beam assembly includes telescopic frame arranged on the outer wall of the connecting frame;The construction device is provided with a roof beam assembly, in use, first, start and control telescopic frame use to move the position of clamping seat, move it to the vicinity of bridge pier, start control and use large hydraulic cylinder to open clamping frame, surround bridge pier by clamping seat and clamping frame, control and use large hydraulic cylinder to move the position of clamping frame to clamp bridge pier, start and control small hydraulic cylinder use, by resisting block upward bridge part, eliminate the adhesion between two end supports and lower chord.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of navigation construction, in particular to a double-machine floating crane whole rapid dismantling large-span prestressed tied-arch bridge construction device. BACKGROUND

[0002] With the increase of urban population density, the safety of urban bridge demolition is particularly important. Common bridge demolition methods include cutting and lifting away method, pushing and translating method, and blasting demolition method. The cutting and lifting away method: the main truss is gradually dismantled from the middle of the bridge, and large machinery needs to operate on the bridge for a long time during the dismantling process. However, at this time, the overall structure of the bridge has been damaged, and its carrying capacity cannot be guaranteed. This construction method has great safety hazards, long construction period, high construction cost, and long-term occupation of the navigation channel by the construction ship, which seriously affects navigation. The pushing and translating method: the main truss is lifted using a jack at the pier position, and then the two main trusses are horizontally pushed towards the riverbank using a jack, and the main truss is broken and dismantled on the riverbank. This method has no effective control means for the horizontal displacement of the main truss in the transverse direction of the bridge, and once it is out of control, the accident loss will be immeasurable. The traditional blasting demolition method: explosives are loaded on the main truss and main pier, and the bridge is blown down into the water at one time, and the underwater blasting and dismantling is carried out. This method has a long dismantling period and high cost, and also seriously affects navigation. In order to protect the navigation requirements of the river, the continuous closure time should not exceed 24 hours, and the main bridge dismantling faces the problem of short continuous operation time. Considering the safety of demolition, demolition period, and influence on the channel period, the double-ship lifting and lifting method is adopted for the construction of the main bridge dismantling scheme to complete the dismantling of the existing tied-arch bridge

[0003] Therefore, it is necessary to design a double-machine floating crane whole rapid dismantling large-span prestressed tied-arch bridge construction device which can be quickly dismantled. SUMMARY

[0004] In view of the problems in the related art, the present application proposes a double-machine floating crane whole rapid dismantling large-span prestressed tied-arch bridge construction device to overcome the above technical problems existing in the prior art.

[0005] To this end, the specific technical solutions adopted by the present application are as follows: the double-machine floating crane whole rapid dismantling large-span prestressed tied-arch bridge construction device comprises a base, the outer wall of the base is provided with a lifting seat, the outer wall of the lifting seat is provided with a connecting frame, the outer wall of the connecting frame is provided with a top beam assembly, the outer wall of the lifting seat is provided with a mechanical arm, and one end of the mechanical arm is provided with a lifting and moving assembly.

[0006] Preferably, the roof beam assembly comprises a telescopic frame arranged on the outer wall of the connecting frame, the outer wall of the telescopic frame is fixedly connected with a clamping seat, the inner wall of the clamping seat is slidably connected with a clamping frame, and a large hydraulic cylinder is arranged between the clamping seat and the clamping frame. Through the arrangement of the roof beam assembly, in use, first, the telescopic frame is started and controlled for use to move the position of the clamping seat to the vicinity of the bridge pier seat, the large hydraulic cylinder is started and controlled for use to open the clamping frame, the bridge pier seat is surrounded by the cooperation of the clamping seat and the clamping frame, the position of the clamping frame is moved by controlling the use of the large hydraulic cylinder to clamp the bridge pier seat, the small hydraulic cylinder is started and controlled for use, the bridge part is upwardly clamped by the abutting block to eliminate the adhesion between the two end supports and the lower chord, the stress structure of the bridge is changed, and then the lifting and moving assembly is used for dismounting, so that the purpose of rapid dismounting is achieved, and the use effect of the device is improved, thereby providing convenience for the user.

[0007] Preferably, the clamping frame comprises a sliding seat slidably arranged on the inner wall of the clamping seat, the outer wall of the sliding seat is provided with clamping teeth, and the top of the sliding seat is provided with a small hydraulic cylinder, and one end of the small hydraulic cylinder is provided with an abutting block. Through the arrangement of the outer wall structure of the clamping frame, the purpose of facilitating auxiliary dismounting can be achieved.

[0008] Preferably, the lifting and moving assembly comprises a connecting seat arranged at the output end of the mechanical arm, a large hydraulic rod is arranged at the bottom of the connecting seat, and a fixing seat is arranged at one end of the large hydraulic rod. Through the arrangement of the lifting and moving assembly, the position of the dismounting bridge is fixed by the fixing rope through the cooperation of the use of the mechanical arm and the moving position, so that the purpose of dismounting is achieved by starting the mechanical arm, the use effect of the device is improved, and convenience is provided for the user.

[0009] Preferably, the number of fixing seats is two, a lifting ring is arranged at the bottom of each fixing seat, and a fixing rope is arranged on the inner wall of the lifting ring. Through the arrangement of the fixing rope, the purpose of conveniently binding and fixing the bridge can be achieved.

[0010] Preferably, a fixed cable is arranged at the end away from the connecting frame, and a drill rod is arranged at one end of the fixed cable. Through the arrangement of the fixed cable at the end away from the connecting frame and the arrangement of the drill rod at one end of the fixed cable, the opposite end of the roof beam assembly can be conveniently positioned, and better balanced use effect is provided for the use of the roof beam assembly.

[0011] Preferably, the base is provided with a track-type driving mechanism. Through the arrangement of the track-type driving mechanism on the base, the use position of the device can be conveniently moved.

[0012] The beneficial effects of the present application are: 1. The double-machine floating crane overall rapid dismantling long-span prestressed tied-arch bridge construction device, through the setting of the top beam assembly, in use, first, start and control the telescopic frame to move the position of the clamping seat to the vicinity of the bridge pier, start and control the use of the large hydraulic cylinder to open the clamping frame, surround the bridge pier through the cooperation of the clamping seat and the clamping frame, and control the use of the large hydraulic cylinder to move the position of the clamping frame to clamp the bridge pier, start and control the use of the small hydraulic cylinder, and move the bridge part upward through the abutting block to eliminate the bonding between the two end supports and the lower chord, change the bridge stress structure, and cooperate with the lifting and moving assembly to realize the purpose of rapid dismantling, thereby improving the use effect of the device and providing convenience for the user.

[0013] 2. The double-machine floating crane overall rapid dismantling long-span prestressed tied-arch bridge construction device, through the setting of the lifting and moving assembly, the cooperation of the moving position of the mechanical arm, and the fixing of the position of the bridge to be dismantled through the fixed rope, thereby starting the mechanical arm to achieve the purpose of dismantling, thereby improving the use effect of the device and providing convenience for the user. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 It is the front view of the present application;

[0016] Figure 2 It is the rear view of the present application;

[0017] Figure 3 It is the structural schematic view of the top beam assembly of the present application;

[0018] Figure 4 It is the structural schematic view of the lifting and moving assembly of the present application.

[0019] In the figure: 1, base; 2, top beam assembly; 201, telescopic frame; 202, clamping seat; 203, large hydraulic cylinder; 204, clamping frame; 3, lifting and moving assembly; 301, connecting seat; 302, large hydraulic rod; 303, fixed seat; 304, fixed rope; 4, mechanical arm; 5, lifting seat; 6, connecting frame; 7, fixed cable. DETAILED DESCRIPTION

[0020] To further illustrate the embodiments, the present application provides accompanying drawings, which are part of the disclosure of the present application, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the related description of the specification. Those skilled in the art should understand other possible implementations and advantages of the present application by referring to these contents. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] According to the embodiments of the present application, a double-machine floating crane overall rapid dismantling large-span prestressed tied arch bridge construction device is provided.

[0022] Embodiment one;

[0023] As Figures 1-4 shown, according to the double-machine floating crane overall rapid dismantling large-span prestressed tied arch bridge construction device of the embodiments of the present application, a base 1 is provided, the outer wall of the base 1 is provided with a lifting seat 5, the outer wall of the lifting seat 5 is provided with a connecting frame 6, the outer wall of the connecting frame 6 is provided with a top beam assembly 2, the outer wall of the lifting seat 5 is provided with a mechanical arm 4, one end of the mechanical arm 4 is provided with a lifting and moving assembly 3; the top beam assembly 2 comprises a telescopic frame 201 provided on the outer wall of the connecting frame 6, the outer wall of the telescopic frame 201 is fixedly connected with a clamping seat 202, the inner wall of the clamping seat 202 is slidably connected with a clamping frame 204, and a large hydraulic cylinder 203 is arranged between the clamping seat 202 and the clamping frame 204; the clamping frame 204 comprises a sliding seat slidably arranged on the inner wall of the clamping seat 202, the outer wall of the sliding seat is provided with clamping teeth, the top of the sliding seat is provided with a small hydraulic cylinder, and one end of the small hydraulic cylinder is provided with an abutting block; a fixed cable 7 is arranged at the end of the connecting frame 6 away from the base 1, and one end of the fixed cable 7 is provided with a drill rod; the base 1 is provided with a caterpillar drive mechanism.

[0024] In this embodiment, through the arrangement of the top beam assembly 2, in use, first, the telescopic frame 201 is started and controlled for use to move the position of the clamping seat 202 to the vicinity of the bridge pier, the large hydraulic cylinder 203 is started and controlled for use to open the clamping frame 204, the bridge pier is surrounded by the cooperation of the clamping seat 202 and the clamping frame 204, and the position of the clamping frame 204 is moved by controlling the use of the large hydraulic cylinder 203 to clamp the bridge pier, the small hydraulic cylinder is started and controlled for use, the abutting block is upwardly clamped to the bridge part to eliminate the bonding between the two end supports and the lower chord, the bridge stress structure is changed, and the lifting and moving assembly 3 is used for dismantling, so as to achieve the purpose of rapid dismantling and improve the use effect of the device, thereby providing convenience for the user.

[0025] In this embodiment, through the arrangement of the outer wall structure of the clamping frame 204, the purpose of facilitating auxiliary disassembly can be achieved.

[0026] In this embodiment, the end of the connecting frame 6 away from the fixed cable 7 is provided with a fixed cable 7, and the end of the fixed cable 7 is provided with a drill rod, which can be conveniently positioned from the opposite end of the roof beam assembly 2, and provides a better balanced use effect for the use of the roof beam assembly 2.

[0027] In this embodiment, the base 1 is provided with a track-type drive mechanism, which can facilitate the movement of the device to the use position.

[0028] Embodiment two;

[0029] Based on embodiment one, the preferred embodiment of the double-machine floating crane overall rapid dismantling large-span prestressed tied-arch bridge construction device provided by the application is shown in Figures 1-4 The lifting and moving assembly 3 includes a connecting seat 301 provided at the output end of the mechanical arm 4, a large hydraulic rod 302 is provided at the bottom of the connecting seat 301, and a fixed seat 303 is provided at one end of the large hydraulic rod 302; the number of fixed seats 303 is two, a lifting ring is provided at the bottom of the fixed seat 303, and a fixed rope 304 is provided at the inner wall of the lifting ring.

[0030] In this embodiment, the fixed rope 304 is used to fix the position of the bridge to be dismantled, and the mechanical arm 4 is started to achieve the purpose of dismantling, thereby improving the use effect of the device and providing convenience for the user.

[0031] In this embodiment, the fixed rope 304 is used to fix the position of the bridge to be dismantled, and the mechanical arm 4 is started to achieve the purpose of dismantling, thereby improving the use effect of the device and providing convenience for the user.

[0032] In order to facilitate the understanding of the above technical solutions of the application, the working principle or operation mode of the application in the actual process is described in detail.

[0033] In actual application, first, the track-type drive mechanism is opened to move the use position of the device, the lifting seat 5 is started to adjust the use height of the device as needed, and the position of the device is fixed by the fixed cable 7 and the drill rod. In use, first, the telescopic frame 201 is started and controlled to move the position of the clamping seat 202 to the vicinity of the bridge pier, the large hydraulic cylinder 203 is started and controlled to open the clamping frame 204, the bridge pier is surrounded by the cooperation of the clamping seat 202 and the clamping frame 204, and the position of the clamping frame 204 is moved to clamp the bridge pier by controlling the use of the large hydraulic cylinder 203, the small hydraulic cylinder is started and controlled, the bridge part is upwardly pushed by the abutting block, the adhesion between the two end supports and the lower chord is eliminated, the bridge stress structure is changed, the position of the lifting and moving assembly 3 is moved by cooperation with the mechanical arm 4, the position of the bridge to be dismantled is fixed by the fixed rope 304, and the mechanical arm 4 is started to achieve the purpose of dismantling, thereby achieving the purpose of rapid dismantling.

[0034] In summary, by means of the above technical scheme of the present application, the double-machine floating crane overall rapid dismantling large-span prestressed tied-arch bridge construction device, through the setting of the top beam assembly 2, in use, first, the telescopic support 201 is started and controlled to use to move the position of the clamping seat 202 to the vicinity of the bridge pier, the large hydraulic cylinder 203 is started and controlled to use to open the clamping frame 204, the bridge pier is surrounded by the cooperation of the clamping seat 202 and the clamping frame 204, and the position of the clamping frame 204 is moved to clamp the bridge pier by controlling the use of the large hydraulic cylinder 203, the small hydraulic cylinder is started and controlled to use, the bridge part is upwardly jacked by the abutting block, the adhesion between the two end supports and the lower chord is eliminated, the bridge stress structure is changed, and the dismantling is carried out in cooperation with the lifting and moving assembly 3, so that the purpose of rapid dismantling is achieved, the use effect of the device is improved, and convenience is provided for the user; through the setting of the lifting and moving assembly 3, the position is moved in cooperation with the use of the mechanical arm 4, the position of the bridge to be dismantled is fixed by the fixed rope 304, so that the purpose of dismantling is achieved by starting the mechanical arm 4, the use effect of the device is improved, and convenience is provided for the user.

[0035] In order to guarantee the river navigation requirement, the continuous closure time should not be more than 24 hours, and the main bridge dismantling faces the problem of short continuous operation time. In the existing city bridge large height difference reverse slope adjusting method, the jacks on the top of the multiple pier columns are connected with controllers, the bridge jacking in the jacking construction process is monitored by multiple displacement sensors to ensure that the jacking is synchronous, same angle and same rate, in the existing large-span truss concrete bridge overall dismantling construction process, the winch and the traction cable are used to slowly rotate to move the truss to the shore dismantling site, and the report that the river surface closure time of both sides of the main truss during dismantling is 5-6 hours. However, the present application adopts a thixotropic jacking device at the bridge support position before lifting, eliminates the adhesion between the two end supports and the lower chord, changes the bridge stress structure, the thixotropic hydraulic reaction speed of the jacking device is 0.5s, and the reaction pressure is 1Mpa. Meanwhile, the present application only needs to close the river once from hanging the lifting cable of the main bridge, lifting and moving to the lifting completion, and uses 0.45h. Considering the factors of dismantling safety, dismantling period and influence on the channel period, the main bridge dismantling scheme adopts the double-boat lifting method to carry out construction and complete the dismantling of the existing tied-arch bridge.

[0036] The present application adopts a thixotropic jacking device at the bridge support position before lifting, eliminates the adhesion between the two end supports and the lower chord, changes the bridge stress structure, the thixotropic hydraulic reaction speed of the jacking device is 0.5s, and the reaction pressure is 1Mpa. The pressure change can be sensed in real time to adjust the jacking height. From hanging the lifting cable of the main bridge, lifting and moving to the lifting completion, only needs to close the river once, and uses 0.45h.

[0037] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction device for the rapid dismantling of a large-span prestressed tied arch bridge using a dual-machine floating crane, comprising a base (1), characterized in that, The outer wall of the base (1) is provided with a lifting seat (5), the outer wall of the lifting seat (5) is provided with a connecting frame (6), the outer wall of the connecting frame (6) is provided with a top beam assembly (2), the outer wall of the lifting seat (5) is provided with a mechanical arm (4), and one end of the mechanical arm (4) is provided with a lifting and moving assembly (3). The top beam assembly (2) includes a telescopic frame (201) disposed on the outer wall of the connecting frame (6). A card seat (202) is fixedly connected to the outer wall of the telescopic frame (201). A card bracket (204) is slidably connected to the inner wall of the card seat (202). A large hydraulic cylinder (203) is disposed between the card seat (202) and the card bracket (204). The card bracket (204) includes a slide block slidably disposed on the inner wall of the card seat (202). The outer wall of the slide block has a locking tooth. A small hydraulic cylinder is disposed on the top of the slide block. A stop block is disposed at one end of the small hydraulic cylinder. In use, firstly, The telescopic frame (201) is activated and controlled to move the position of the bracket (202) to the vicinity of the bridge pier. The large hydraulic cylinder (203) is activated and controlled to open the bracket (204). The bracket (202) and the bracket (204) work together to surround the bridge pier. The large hydraulic cylinder (203) is controlled to move the position of the bracket (204) to lock the bridge pier. The small hydraulic cylinder is activated and controlled to push the bridge part upward by the abutment block to eliminate the adhesion between the two end supports and the lower chord, change the stress structure of the bridge, and then dismantle it in conjunction with the lifting assembly (3).

2. The construction device for rapid dismantling of large-span prestressed tied arch bridges using a dual-machine floating crane as described in claim 1, characterized in that... The lifting assembly (3) includes a connecting seat (301) provided at the output end of the robotic arm (4), a large hydraulic rod (302) provided at the bottom of the connecting seat (301), and a fixed seat (303) provided at one end of the large hydraulic rod (302).

3. The construction device for rapid dismantling of large-span prestressed tied arch bridges using a dual-machine floating crane as described in claim 2, characterized in that... There are two fixing seats (303), and the bottom of the fixing seat (303) is provided with a lifting ring, and the inner wall of the lifting ring is provided with a fixing rope (304).

4. The construction device for rapid dismantling of large-span prestressed tied arch bridges using a dual-machine floating crane as described in claim 3, characterized in that... A fixing cable (7) is provided at the far end of the connecting frame (6), and a drill rod is provided at one end of the fixing cable (7).

5. The construction device for rapid dismantling of large-span prestressed tied arch bridges using a dual-machine floating crane as described in claim 4, characterized in that... The base (1) is equipped with a tracked drive mechanism.

Images