Highway three-dimensional reconstruction and extension bridge installation equipment and construction method thereof

Abstract

The invention discloses highway three-dimensional reconstruction and extension bridge installation equipment and a construction method thereof.The equipment comprises a main beam structure, the front end of the main beam structure is supported on a pier column of a bridge through a front supporting leg, and the rear portion of the main beam structure is supported on a bridge deck precast beam of the bridge through a rear supporting leg and a middle supporting leg; the rotating turntable is arranged on the bridge deck precast beam and is used for rotating the steel cover beam, the main beam structure comprises two main beams which are arranged side by side, and two movable crown blocks are arranged on each main beam. The steel cover beams and the precast beams are transported and installed on the bridge deck of the bridge girder erection machine, occupied ground lanes are reduced, long-time traffic closing is avoided, and operation interference on existing traffic is reduced; the construction difficulty of high-altitude rotation of a large-span steel cover beam is large, a bridge deck rotation-double-main-beam lifting mode is adopted, potential safety hazards of suspended rotation of the large-tonnage steel cover beam are avoided, the requirement for a lifting appliance is reduced, meanwhile, the single-hook lifting weight of a bridge girder erection machine is reduced, and the construction safety risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge structure construction, and in particular to a highway stereoscopic reconstruction and expansion bridge installation device and a construction method thereof. Background Art

[0002] As traffic volume increases, urban areas often use three-dimensional reconstruction and expansion to meet the growing traffic demand. A common method is to use a portal frame structure as the main structure of a new bridge, and then erect upper prefabricated beams to form a new viaduct. The construction of three-dimensional reconstruction and expansion bridges on urban highways has high requirements for traffic maintenance, limited construction space, and high safety requirements. Therefore, the construction of large-span steel cap beams and prefabricated beams in portal frame structures is more difficult.

[0003] The conventional installation method for large-span steel cap beams is to use a modular vehicle to transport the steel cap beam to a designated location next to the pier, and then use the pier-side bracket lifting system to install the steel cap beam. However, modular vehicle transportation has high requirements for roads, and existing high-speed bridges also need to be inspected and reinforced to meet the requirements of modular vehicle transportation. During installation, the rotation next to the pier requires not only the removal of the median strip, but also the closure of the existing road. At the same time, the installation efficiency of the pier-side bracket lifting system is low, resulting in a long overall road occupation time during installation, affecting the requirements for maintaining the traffic of existing highways.

[0004] In order to reduce the impact on the existing traffic environment, an integrated bridge erection machine is often used to install the new bridge deck as a transportation channel for steel cap beams and prefabricated beams. However, it is difficult to install the steel cap beam at high altitude, the layout of the bridge erection machine is prone to interference, and the safety risk of installation on the bridge is high. Therefore, a feasible technical solution is urgently needed to solve the above problems.

[0005] For example, patent CN118441575A discloses a bridge-building machine and a construction method thereof, comprising a main beam, on which a front support leg, a front auxiliary support leg, a middle support leg and a rear support leg are sequentially arranged, the rear support leg and the front support leg are respectively arranged at two ends of the main beam, a bridge deck is arranged below the main beam, the rear support leg and the middle support leg are both arranged on the bridge deck, piers are sequentially arranged on the sides of the bridge deck, steel supporting piers are arranged on the piers, and the steel supporting piers are connected with lateral adjustment devices; an overhead crane is arranged at the upper end of the main beam, and the overhead crane is connected with a rotating hanger; the steel cap beam is rotated in the air by using the rotating hanger, and the high-altitude rotation of the steel cap beam is difficult to operate and has high safety risks. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a highway three-dimensional reconstruction and expansion bridge installation equipment and a construction method thereof, so as to achieve the purpose of rotating the steel cap beam on the bridge deck with simple operation and low safety risk.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A highway three-dimensional reconstruction and expansion bridge installation equipment includes a main beam structure, the front end of the main beam structure is supported on the pier of the bridge through a front support leg, the rear part of the main beam structure is supported on the precast bridge deck beam of the bridge through a rear support leg and a middle support leg, and also includes a rotating turntable arranged on the precast bridge deck beam for rotating the steel cap beam, the main beam structure includes two main beams arranged side by side, and each main beam is provided with two movable overhead cranes.

[0009] Each of the main beams comprises two guide beams arranged side by side and in parallel, and the overhead travelling crane is arranged on the two guide beams.

[0010] The front supporting legs are correspondingly provided with front auxiliary supporting legs, and the lower ends of the front supporting legs and the front auxiliary supporting legs are supported on the top of the pier column through a cross beam.

[0011] A crane which can move laterally is installed on the overhead crane.

[0012] A bridge deck beam transporter for transporting the beams is provided above the prefabricated beams of the bridge deck.

[0013] The rotating turntable comprises a chassis, a rotating ball and a rotating frame. The chassis is arranged on a prefabricated beam of a bridge deck. The chassis is provided with an annular groove, the rotating ball is arranged in the annular groove, and the rotating frame is arranged on the rotating ball.

[0014] The chassis is provided with a traverse roller which can be raised and lowered.

[0015] The transverse roller is arranged on the base through a group of jacks.

[0016] The group of jacks is located inside the circular groove, and the transverse roller is lower than the rotating frame when the jacks are not lifted.

[0017] A method for construction using the highway three-dimensional reconstruction and expansion bridge installation equipment comprises the following steps:

[0018] S1: Install the bridge erection machine on the new bridge;

[0019] S2: Move the main beam forward longitudinally, and move the front outrigger and the crossbeam to the front side of Pier N. The front auxiliary outrigger is supported by the crossbeam on one side of the steel cap beam at the top of Pier N-1.

[0020] S3: Move the middle outrigger forward to the precast beam on the top of Pier N-1, and move the front auxiliary outrigger and beam to Pier N;

[0021] S4: Move the main beam forward, and the front outriggers, front auxiliary outriggers and cross beams are supported to the N+1 pier in sequence;

[0022] S5: The beam transport vehicle transports the steel cap beam to the bridge deck below the tail of the first main beam of the bridge erecting machine;

[0023] S6: The first main beam crane lifts the steel cap beam and places it on the rotating turntable;

[0024] S7: Raise the middle leg and rotate the turntable 90° to complete the rotation of the steel cap beam;

[0025] S8: Combine the first main beam and the second main beam crane respectively, and lift the steel cap beam with the hanger and move it horizontally to the front of the middle leg to support the middle leg;

[0026] S9: The overhead crane hoists the steel cap beam to the top of Pier N, installs the steel cap beam of Pier N and temporarily fixes it;

[0027] S10: pour concrete at the connection between piers and beams to make permanent connection between piers and beams;

[0028] S11: transporting the precast beam to the bridge deck below the tail of the bridge erecting machine by means of a beam transport vehicle;

[0029] S12: The overhead crane lifts the precast beams and moves them horizontally to lower them one by one;

[0030] S13: Carry out the construction of precast beam end cross beams, wet joints, etc., and complete the bridge deck construction;

[0031] S14: After the joint reaches the designed strength, repeat steps S2-S13 to complete the bridge construction.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1. Meet the requirements of high-speed traffic protection: Use bridge erection machine to transport and install steel cap beams and prefabricated beams on the bridge deck to reduce the occupation of ground lanes, avoid long-term traffic closures, and reduce operational interference with existing traffic;

[0034] 2. Improve safety: The high-altitude rotation of large-span steel cap beams is difficult to construct. The bridge deck rotation-double main beam lifting method is adopted to avoid the safety hazards of large-tonnage steel cap beams suspended in the air, reduce the requirements for lifting equipment, and reduce the weight of the single hook of the bridge erection machine, thereby reducing the construction safety risks;

[0035] 3. Improve construction efficiency: Use double main beam construction to improve the efficiency of lateral displacement installation of prefabricated beams, while avoiding frequent changes in the position of the bridge erection machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following is a brief description of the contents and symbols in the drawings of this specification:

[0037] Figures 1 to 3 It is a schematic diagram of the installation of the bridge erecting machine of the present invention.

[0038] Figure 4 and Figure 5 This is a schematic diagram of lifting the steel cap beam according to the present invention.

[0039] Figure 6 and Figure 7 It is a schematic diagram of the rotation of the steel cap beam of the present invention.

[0040] Figure 8 It is a schematic diagram of the transverse movement of the steel cap beam of the present invention.

[0041] Fig. 9 and Fig.10 It is a schematic diagram of the lifting and installation of the double main beams of the present invention.

[0042] Fig.11 It is a schematic diagram of the structure of the rotating turntable of the present invention.

[0043] Fig.12 It is a schematic diagram of the tail beam feeding of the bridge erecting machine of the present invention.

[0044] Fig.13 This is a schematic diagram of the installation of the prefabricated beam of the present invention.

[0045] Fig.14 It is a schematic diagram of the installation section of the present invention. DETAILED DESCRIPTION

[0046] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0047] like Figures 1 to 14 As shown, the installation equipment for the steel cap beams and precast beams of the highway three-dimensional reconstruction and expansion bridge includes a main beam structure and a rotating turntable for rotating the steel cap beams, which is arranged on the erected precast beams of the bridge deck. The front end of the main beam structure is supported on the piers of the bridge through front legs, and the rear part of the main beam structure is supported on the precast beams of the bridge deck through rear legs and middle legs. The main beam structure includes two main beams arranged side by side, and each main beam is provided with two movable overhead cranes.

[0048] The front legs are provided with front auxiliary legs correspondingly, and the lower ends of the front legs and the front auxiliary legs are supported on the top of the pier column through cross beams, so the structure is stable and reliable.

[0049] Each of the main beams comprises two guide beams arranged side by side and in parallel. A crane is arranged on the two guide beams. A crane which can move laterally is installed on the crane to facilitate the lateral movement of the steel cap beam.

[0050] A deck beam transporter for transporting beams is installed above the precast beams of the bridge deck. The steel cap beam is lifted from the beam lifting station to the deck beam transporter, and then the beam to be installed is moved to the required position by the deck beam transporter, making the transportation efficient.

[0051] The rotating turntable comprises a chassis, a rotating ball and a rotating frame. The chassis is arranged on a prefabricated beam of a bridge deck. The chassis is provided with a circular groove, the rotating ball is arranged in the circular groove, and the rotating frame is arranged on the rotating ball.

[0052] The chassis is provided with a traverse roller that can be raised and lowered. Preferably, the traverse roller is arranged on the base through a set of jacks; a set of jacks is located inside the circular groove, and the traverse roller is lower than the rotating frame when the jacks are not lifted; after the rotating turntable supports the rotation of the steel cap beam, it can also support the lateral movement of the steel cap beam, which is safe and reliable.

[0053] The present invention has the following advantages: 1. It meets the requirements of high-speed traffic maintenance: the bridge erection machine is used to transport and install steel cap beams and prefabricated beams on the bridge deck, which reduces the occupation of ground lanes, avoids long-term traffic closures, and reduces operational interference with existing traffic; 2. It improves safety: the high-altitude rotation of large-span steel cap beams is difficult to construct, and the bridge deck rotation-double main beam lifting method is adopted to avoid the safety hazards of suspended rotation of large-tonnage steel cap beams, reduce the requirements for lifting equipment, and reduce the lifting weight of a single hook of the bridge erection machine, thereby reducing construction safety risks; 3. It improves construction efficiency: double main beam construction is adopted to improve the efficiency of lateral displacement and installation of prefabricated beams, and avoid frequent position changes of the bridge erection machine.

[0054] Preferred embodiments of the present invention are:

[0055] The equipment for installing steel cap beams and prefabricated beams for the three-dimensional reconstruction and expansion of the highway is a double-girder parallel bridge erection machine. The first and second main beams are composed of two guide beams, front auxiliary outriggers, front outriggers, middle outriggers, rear outriggers and two overhead cranes. The two guide beams are arranged in parallel, with the front outriggers and rear outriggers located at both ends of the guide beams. The front auxiliary outriggers and the front outriggers are supported on the piers through crossbeams, and the middle outriggers and rear outriggers are supported on the prefabricated beams of the bridge deck. When installing the large-span steel cap beam, the transport vehicle is transported from the bridge deck to the tail of the bridge erection machine. The first main beam overhead crane separately lifts the steel cap beam to the rotating turntable of the bridge deck. The turntable includes a rotating part and a transverse moving part. The rotating turntable rotates 90° to realize the rotation of the steel cap beam. The overhead cranes of the two main beams are combined to lift the steel cap beam after the rotation to form a two-main beam lifting method. After the turntable and the overhead crane are moved horizontally to a suitable position, they are lifted to the pier to be installed for installation. The precast beams are transported to the tail of the bridge erection machine by a beam transport vehicle, and the installation of the two precast beams is completed by the overhead cranes on the two main beams, thereby improving the installation efficiency.

[0056] like Figures 1 to 3 As shown, the bridge crane is installed:

[0057] The bridge erection machine is installed at the starting section of the new bridge. The bridge erection machine includes two main beams arranged in parallel. Each main beam is composed of two guide beams, front legs, front auxiliary legs, middle legs, rear legs and two overhead cranes. A crane is installed on each overhead crane, which can move horizontally on the overhead crane. The front and rear legs are located at both ends of the guide beam of the bridge erection machine. After the bridge erection machine is installed, it is ready to pass through the hole. The main beam moves forward to drive the front legs and the crossbeam to move forward to the cantilever force between the N pier and the N+1 pier. The front auxiliary legs are supported by the crossbeam on one side of the steel cap beam at the top of the N-1 pier. The middle legs are moved forward to the head of the precast beam of the N-1 pier. The front auxiliary legs and the crossbeam are moved forward to support the top of the N pier. The rear legs are retracted and the main beam is moved forward so that the front legs are supported on the N+1 pier through the crossbeam. The front auxiliary legs are moved forward and supported by the crossbeam to the N+1 pier to complete the bridge erection machine passing through the hole.

[0058] like Figures 4 to 11 As shown, the steel cap beam bridge deck is rotated and installed:

[0059] The steel cap beam is lifted from the beam lifting station to the bridge deck beam transporter, which transports the steel cap beam to the space between the front leg and the middle leg at the tail of the first main beam. The two overhead cranes of the first main beam are separated, and the steel cap beam is lifted to the rotating platform on the prefabricated beam by the crane on the overhead crane. The middle leg is raised, and the rotating platform is opened to rotate the steel cap beam 90° to complete the rotation.

[0060] After the steel cap beam is rotated, the two main beam cranes are merged respectively, and the lower part of the crane on the crane is merged into a hanger. The rotating platform moves the steel cap beam horizontally to the bottom of one end of the steel cap beam and reaches the bottom of the second main beam hanger. The two main beam hangers lift the steel cap beam and move it horizontally to the appropriate position. The double main beam lifts the steel cap beam to the top of Pier N, lowers the middle leg to support it on the prefabricated beam, and the crane lowers the steel cap beam together to complete the installation of the steel cap beam at Pier N.

[0061] The rotating turntable consists of a chassis, a rotating ball, a rotating frame, a jack and a transverse roller. When the jack is not lifted, the transverse roller is lower than the rotating frame, the steel cap beam is placed on the rotating frame, and the rotating frame is rotated 90° to complete the rotation of the steel cap beam. After the steel cap beam rotates, the jack lifts the transverse platform, and the roller moves the steel cap beam horizontally to the bottom of the two main beam hangers.

[0062] like Figure 12 to Figure 14 As shown, the prefabricated beams are hoisted and installed:

[0063] The precast beams are transported by beam transport vehicles to the tail of the two main beams of the bridge erection machine, and the cranes on the two main beams complete the installation of the precast beams. The steel cap beams and precast beams are transported and installed on the bridge deck to avoid occupying the high-speed road channel, reduce interference with existing traffic, and achieve the goal of high-speed construction.

[0064] The construction method of the present invention comprises the following steps:

[0065] S1: Install the bridge erection machine on the newly built bridge and prepare the crossing hole;

[0066] S2: Move the main beam forward longitudinally, and move the front outrigger and the crossbeam to the front side of Pier N. The front auxiliary outrigger is supported by the crossbeam on one side of the steel cap beam at the top of Pier N-1.

[0067] S3: Move the middle outrigger forward to the precast beam on the top of Pier N-1, and move the front auxiliary outrigger and beam to Pier N;

[0068] S4: Move the main beam forward, and the front outriggers, front auxiliary outriggers and cross beams are supported to the N+1 pier in sequence;

[0069] S5: The beam transport vehicle transports the steel cap beam to the bridge deck below the tail of the first main beam of the bridge erecting machine;

[0070] S6: The first main beam crane lifts the steel cap beam and places it on the rotating turntable;

[0071] S7: Raise the middle leg and rotate the turntable 90° to complete the rotation of the steel cap beam;

[0072] S8: Combine the first main beam and the second main beam crane respectively, and hoist the steel cap beam to the position 1m in front of the middle leg to support the middle leg (the middle leg is stressed);

[0073] S9: The overhead crane hoists the steel cap beam to the top of Pier N, installs the steel cap beam of Pier N and temporarily fixes it;

[0074] S10: pour concrete at the connection between piers and beams to make permanent connection between piers and beams;

[0075] S11: transporting the precast beam to the bridge deck below the tail of the bridge erecting machine by means of a beam transport vehicle;

[0076] S12: The overhead crane lifts the precast beams and moves them horizontally to lower them one by one;

[0077] S13: Carry out the construction of precast beam end cross beams, wet joints, etc., and complete the bridge deck construction;

[0078] S14: After the joint reaches the designed strength, repeat steps S2-S13 to complete the bridge construction.

[0079] The present invention solves the problems of great difficulty in installing and constructing large-span steel cap beams and prefabricated beams of portal frame structures in urban highway stereoscopic reconstruction and expansion projects, as well as high safety risks; the steel cap beams are rotated on the bridge deck, which is easy to operate and has low safety risks.

[0080] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0081] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A highway three-dimensional reconstruction and expansion bridge installation equipment, comprising a main beam structure, the front end of the main beam structure is supported on the pier of the bridge through the front legs, and the rear of the main beam structure is supported on the prefabricated bridge deck beam of the bridge through the rear legs and the middle legs, characterized in that: It also includes a rotating turntable arranged on the prefabricated beam of the bridge deck for rotating the steel cap beam. The main beam structure includes two main beams arranged side by side, and each main beam is provided with two movable overhead cranes.

2. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 1, characterized in that: Each of the main beams comprises two guide beams arranged side by side and in parallel, and the overhead travelling crane is arranged on the two guide beams.

3. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 1, characterized in that: The front supporting legs are correspondingly provided with front auxiliary supporting legs, and the lower ends of the front supporting legs and the front auxiliary supporting legs are supported on the top of the pier column through a cross beam.

4. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 1 or 2, characterized in that: A crane which can move laterally is installed on the overhead crane.

5. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 1, characterized in that: A bridge deck beam transporter for transporting the beams is provided above the prefabricated beams of the bridge deck.

6. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 1, characterized in that: The rotating turntable comprises a chassis, a rotating ball and a rotating frame. The chassis is arranged on a prefabricated beam of a bridge deck. The chassis is provided with an annular groove, the rotating ball is arranged in the annular groove, and the rotating frame is arranged on the rotating ball.

7. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 6, characterized in that: The chassis is provided with a traverse roller which can be raised and lowered.

8. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 7, characterized in that: The transverse roller is arranged on the base through a group of jacks.

9. The highway three-dimensional reconstruction and expansion bridge installation equipment as claimed in claim 8, characterized in that: The group of jacks is located inside the circular groove, and the transverse roller is lower than the rotating frame when the jacks are not lifted.

10. A method for construction using the highway stereoscopic reconstruction and expansion bridge installation equipment as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: Install the bridge erection machine on the new bridge; S2: Move the main beam forward longitudinally, and move the front outrigger and the crossbeam to the front side of Pier N. The front auxiliary outrigger is supported by the crossbeam on one side of the steel cap beam at the top of Pier N-1. S3: Move the middle outrigger forward to the precast beam on the top of Pier N-1, and move the front auxiliary outrigger and beam to Pier N; S4: Move the main beam forward, and the front outriggers, front auxiliary outriggers and cross beams are supported to the N+1 pier in sequence; S5: The beam transport vehicle transports the steel cap beam to the bridge deck below the tail of the first main beam of the bridge erecting machine; S6: The first main beam crane lifts the steel cap beam and places it on the rotating turntable; S7: Raise the middle leg and rotate the turntable 90° to complete the rotation of the steel cap beam; S8: Combine the first main beam and the second main beam crane respectively, and lift the steel cap beam with the hanger and move it horizontally to the front of the middle leg to support the middle leg; S9: The overhead crane hoists the steel cap beam to the top of Pier N, installs the steel cap beam of Pier N and temporarily fixes it; S10: pour concrete at the connection between piers and beams to make permanent connection between piers and beams; S11: transporting the precast beam to the bridge deck below the tail of the bridge erecting machine by means of a beam transport vehicle; S12: The overhead crane lifts the precast beams and moves them horizontally to lower them one by one; S13: Carry out the construction of precast beam end cross beams, wet joints, etc., and complete the bridge deck construction; S14: After the joint reaches the designed strength, repeat steps S2-S13 to complete the bridge construction.

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