Mechanical descending equipment and bridge demolition construction method

Abstract

The invention belongs to the technical field of bridge demolition construction, and relates to mechanical descending equipment and a bridge demolition construction method. The equipment comprises an SPMT module vehicle, a tool bracket and a plurality of descending supports, the tool support comprises a plurality of parallel bearing beams and a plurality of parallel supporting beams, the two ends of the bottom face of each bearing beam are each connected with an outer stand column, a plurality of inner stand columns are arranged between the two outer stand columns, the top ends of the inner stand columns are connected with the bearing beams, the bottom ends of the inner stand columns are detachably connected with the SPMT module vehicle, and each outer stand column and each inner stand column comprise a plurality of steel barrels which are vertically and detachably connected. The bottom face of the supporting beam is pressed on and perpendicular to all the bearing beams. The top end of the descending support is detachably connected with the outer stand column, and the bottom end is detachably connected with the ground. When the bridge is disassembled, the cut-off beam body is transported outwards, the descending support and the SPMT module vehicle are used for alternately supporting the beam body so as to disassemble the lower-layer steel barrels of the inner stand columns and the outer stand columns in turn, automatic descending of the beam body is achieved step by step, the defects of existing bridge disassembling are overcome, and rapid and safe bridge disassembling construction is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge demolition construction, and in particular relates to a mechanized lowering equipment and a bridge demolition construction method. Background Art

[0002] With the advancement of economic and social development and urbanization, some old highway bridges need to be demolished due to insufficient traffic capacity, insufficient bearing capacity, existing plans not meeting traffic needs, and approaching the end of their service life.

[0003] Currently, the main methods for bridge demolition construction include mechanical crushing demolition, blasting demolition, static cutting demolition, and multi-method combined demolition. Mechanical crushing demolition is simple and direct, suitable for low-height ground bridges, but it has problems such as low efficiency and high noise pollution. Blasting demolition is suitable for construction environments with simple surroundings, no impact on the safety of surrounding buildings, and low environmental protection requirements, but it has problems such as high noise, high dust pollution, and blasting safety risks. Static cutting generally uses a rope saw to cut concrete after erecting a full-length scaffolding, and then hoisting and transporting the concrete in sections. However, it has problems such as the heavy workload of scaffolding erection, long construction period, and long-term road occupation, which greatly affects the traffic on the road under the bridge. In addition, the cut beams usually need to be lowered using lifting equipment such as truck cranes or gantry cranes, requiring the cooperation of large cranes. Due to the surrounding environment, especially urban bridge demolition projects, the heavy traffic on the road under the bridge and the complex high-voltage cable pipelines have limited the operation of cranes, increasing the construction difficulty and reducing construction efficiency and safety. Summary of the Invention

[0004] In response to the shortcomings in related technologies, the present invention provides a mechanized lowering equipment and a bridge demolition construction method, aiming to solve the problems of low construction efficiency, heavy workload, and significant impact on under-bridge traffic and surrounding environment in existing bridge demolition methods, and to improve the efficiency and safety of bridge demolition construction.

[0005] The present invention provides a mechanized lowering equipment, comprising an SPMT module vehicle, a tooling bracket and a plurality of lowering supports; wherein the tooling bracket comprises: Multiple load-bearing beams are arranged in parallel; each load-bearing beam is connected to an outer column at both ends of its bottom surface in the longitudinal direction, the distance between the two outer columns is greater than the width of the SPMT module vehicle, and multiple inner columns are arranged between the two outer columns, the top ends of the inner columns are connected to the load-bearing beam, and the bottom ends of the inner columns are detachably connected to the SPMT module vehicle; each outer column and inner column includes multiple steel drums that are detachably connected vertically; Multiple support beams are arranged in parallel; the bottom surface of each support beam is pressed against the top surface of all the load-bearing beams and is perpendicular to the load-bearing beams, and the top surfaces of all the support beams are used to support the components; The multiple lowering supports correspond one to one with the multiple external columns on the tooling bracket. The top end of the lowering support is detachably connected to the bottom end of the external column, and the bottom end of the lowering support is detachably connected to the ground.

[0006] In some embodiments, the SPMT module vehicle includes a vehicle body and a power unit connected to one end of the vehicle body, wherein the vehicle body includes a plurality of module units connected to each other.

[0007] In some embodiments, two adjacent outer columns, two adjacent inner columns, and adjacent outer columns and inner columns on the tooling bracket are detachably connected by a plurality of parallel connection structures spaced apart from top to bottom.

[0008] In some embodiments, the parallel connection structure includes a bolted plate and two connecting plates. The connecting plate is welded to the side wall of the outer column or the inner column. Both ends of the bolted plate are detachably connected to the two connecting plates by bolts.

[0009] In some embodiments, the outer pillars and the inner pillars are of equal height, and the height of the lowering support is between the minimum vehicle height before the SPMT module vehicle is lifted and the maximum vehicle height after the vehicle is lifted.

[0010] The present invention also provides a bridge demolition construction method, which is carried out using the aforementioned mechanized lowering equipment and includes the following steps: S1. Demolition of bridge ancillary structures; S2. Prepare three sets of mechanized lowering equipment, which includes assembling three SPMT modular vehicles, assembling three sets of tooling brackets, and connecting the inner columns of the three sets of tooling brackets to the three SPMT modular vehicles respectively; S3. Two SPMT modular vehicles drive into the bridge section to be demolished at the head end of the bridge, and another SPMT modular vehicle drives into the next bridge section to be demolished. Then, the three SPMT modular vehicles are lifted so that the top surfaces of the support beams on the three sets of tooling brackets are pressed against the bottom surface of the bridge beam body. S4. Cutting the beams on the bridge to be demolished by cutting; cutting off the upper and lower ends of the bridge pier on the side of the bridge to be demolished away from the next bridge to be demolished, hoisting the bridge pier onto a flatbed truck and transporting it to a designated site for crushing and slag removal; S5. The two SPMT modules under the bridge to be demolished carry the cut beams and move them a preset distance away from the next bridge to be demolished. Then, they transport the beams to a temporary site along a predetermined route. S6. In the temporary site, install a lowering support on the ground corresponding to each outer column of the two sets of tooling supports. Use the lowering support and the SPMT modular vehicle to alternately support the tooling supports and the beams thereon, so as to alternately remove the lower steel drums of the inner columns and the lower steel drums of the outer columns, and then gradually lower the beams on the SPMT modular vehicle to the preset height. S7. Two SPMT modular vehicles transport the lowered beam to a designated site. The designated site is provided with support piers. After placing the beam on the support piers, the two SPMT modular vehicles leave the designated site. The beam is then crushed and slag removed. S8, the two SPMT modular vehicles respectively drive into the next bridge to be demolished and the next bridge to be demolished, and repeat steps S4 to S7 until the beams on all bridge spans are cut, transported, crushed and slag removed; S9. Destroy the bridge pier at the rear end of the bridge on site; or cut off the lower end of the bridge pier at the rear end of the bridge, lift the bridge pier onto a flatbed truck and transport it to a designated site for crushing and slag removal.

[0011] In some embodiments, step S1 also includes setting a protective device at the bridge auxiliary structure to be demolished; step S4 also includes setting a protective device at the position of the bridge beam to be cut; the protective device includes a pipe rack and a dense mesh, the pipe rack includes a bottom frame, two side frames and a plurality of rack pipes, the bottom frame, the side frames and the rack pipes are all connected by multiple steel pipes, the bottom frame is arranged below the beam, the two side frames are respectively located on both sides outside the beam in the width direction, the bottom of the side frame is connected to the bottom frame, the top of the side frame is higher than the top surface of the bridge guardrail, multiple rack pipes are arranged near the guardrails on both sides of the bridge, the lower part of the rack pipes is fixed on the bridge deck, and the upper part of the rack pipes is connected to the side frames; the dense mesh is laid on the bottom frame and the two side frames.

[0012] In some embodiments, in step S2, assembling the tooling bracket includes: Connecting the plurality of steel drums in sequence by bolts to form a plurality of inner columns and a plurality of outer columns respectively; Place an outer column at both ends of the length direction of the bottom surface of each load-bearing beam, and place multiple inner columns between the two outer columns. Fully weld the uppermost steel drums of the outer columns and inner columns to the load-bearing beam; Place each support beam on top of all the bearing beams, making sure the support beams are perpendicular to the bearing beams.

[0013] In some embodiments, in step S3, after the roof of the SPMT module vehicle is raised so that the support beams on the tooling bracket are pressed against the bottom surface of the beam body, it is checked whether each support beam is in full contact with the bottom surface of the beam body. If there is a gap between the support beam and the bottom surface of the beam body, a thin steel plate or a solid wood board is used to fill and compact it.

[0014] In some embodiments, step S6 further includes the following steps: S61. Connect the bottoms of all lowered supports to the ground with anchor bolts; S62. Lower the SPMT modular vehicle so that each outer column of the tooling bracket is pressed onto the lowering support, and connect the lowest steel drum of the outer column to the lowering support with bolts; S63. Release the connection between the lowest steel drum on the inner column and the steel drum on the upper layer; lower the SPMT module vehicle to make space between the lowest steel drum on the inner column and the steel drum on the upper layer; S64, the SPMT module car drives away from the area where the tooling bracket is located; the connection between the lowest steel drum on the inner column of the SPMT module car and the SPMT module car is released, and the steel drum on the SPMT module car is lifted away; the SPMT module car returns to its position in step S62; S65. The SPMT modular vehicle is lifted until it contacts the inner column; the connection between the lowest steel drum on the outer column and the upper steel drum is released; the SPMT modular vehicle continues to lift to clear the space between the lowest steel drum on the outer column and the upper steel drum; S66, the SPMT module vehicle carries the tooling bracket and the beam on it away from the area where the lowering support is located; the connection between the lowest steel drum on the outer column and the lowering support is released, and the steel drum on the lowering support is lifted away; S67. The SPMT modular vehicle is lowered, and the amount of the height reduction does not exceed the height of one layer of steel drums. It is determined whether the beam on the SPMT modular vehicle has been lowered to the preset height. If so, step S7 is executed. If not, the SPMT modular vehicle returns to its position in step S62, and steps S62 to S67 are continued until the beam on the SPMT modular vehicle is lowered to the preset height.

[0015] Based on the above technical solution, the mechanized lowering equipment and bridge demolition construction method in the embodiment of the present invention transport the cut beam to a temporary site, and use the lowering support and SPMT modular vehicle to alternately support the beam to gradually realize the autonomous lowering of the beam, thereby solving the problems of large workload, low construction efficiency, and great impact on traffic under the bridge and the surrounding environment in existing bridge demolition, and realizing rapid and safe bridge demolition construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 A schematic diagram of the mechanized lowering equipment of the present invention; Figure 2 is a basic flow chart of the bridge demolition construction method of the present invention; Figure 3 Schematic diagram of the protective device in step S1 of the bridge demolition construction method of the present invention; Figure 4This is a schematic diagram after step S3 is completed in the bridge demolition construction method of the present invention; Figure 5 Schematic diagram of the beam cutting line and the bridge pier cutting line in step S4 of the bridge demolition construction method of the present invention; Figure 6 This is a schematic diagram of the bridge demolition construction method of the present invention, in which the beam body after cutting in step S5 is moved a preset distance away from the collapse direction of the next bridge to be demolished; Figure 7 This is a flow chart of step S6 in the bridge demolition construction method of the present invention; Figure 8 This is a schematic diagram after step S62 is completed in the bridge demolition construction method of the present invention; Figure 9 This is a schematic diagram after step S63 is completed in the bridge demolition construction method of the present invention; Figure 10 This is a process diagram of step S64 in the bridge demolition construction method of the present invention; Figure 11 This is a schematic diagram after step S64 is completed in the bridge demolition construction method of the present invention; Figure 12 This is a schematic diagram after step S65 is completed in the bridge demolition construction method of the present invention; Figure 13 This is a process diagram of step S66 in the bridge demolition construction method of the present invention.

[0017] In the figure: 10. SPMT modular vehicle; 11. Power unit; 12. Module unit; 20. Tooling bracket; 21. Load-bearing beam; 22. Support beam; 23. External column; 24. Internal column; 25. Steel drum; 26. Flat structure; 30. Lowering support; 40. Bridge; 41. Beam; 42. Bridge pier; 50. Protective device; 51. Pipe rack; 511. Bottom frame; 512. Side frame; 513. Pipe rack; 52. Fine mesh. DETAILED DESCRIPTION

[0018] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "top", "bottom", "inside", "outside", "left", "right", "front", "back", "vertical", "horizontal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0021] refer to Figure 1 、 Figure 7-13 As shown, the present invention provides a mechanized lowering equipment that can be used to transport and lower large components such as bridge beams 40 and 41. The mechanized lowering equipment includes an SPMT module vehicle 10, a tooling support 20, and a plurality of lowering supports 30.

[0022] The SPMT modular vehicle 10, also known as a self-propelled modular transporter or self-propelled hydraulic flatbed, can be used to transport heavy, large, tall, and special-shaped components. It offers advantages such as flexibility, easy loading and unloading, and a large load capacity. It can move forward, backward, turn on the spot, move horizontally, and lift and lower. Specifically, the SPMT modular vehicle 10 comprises a vehicle body and a power unit 11 connected to one end of the vehicle body. The vehicle body comprises multiple interconnected modular units 12. The power unit 11 (PPU) provides power for the operation of the SPMT modular vehicle 10. The modular units 12 are connected to each other via data cables, ensuring synchronization in command reception and execution between the various modular units 12.

[0023] The tooling bracket 20 is detachably connected to the SPMT module vehicle 10. The tooling bracket 20 includes a plurality of parallel and spaced load-bearing beams 21 and a plurality of parallel and spaced support beams 22. The load-bearing beams 21 can be five-piece I-beams, and the support beams 22 can be three-piece I-beams.

[0024] Each load-bearing beam 21 has an outer column 23 connected to each end of its bottom surface along its length. A plurality of inner columns 24 are spaced apart along the length of the load-bearing beam 21 between the two outer columns 23. The top ends of the inner columns 24 are connected to the bottom surface of the load-bearing beam 21, and the bottom ends of the inner columns 24 are detachably connected to the SPMT modular vehicle 10. Furthermore, when the inner columns 24 are connected to the SPMT modular vehicle 10, the length of the load-bearing beam 21 is perpendicular to the width of the SPMT modular vehicle 10. The length of the load-bearing beam 21 is greater than the width of the SPMT modular vehicle 10, and the distance between the two outer columns 23 of the load-bearing beam 21 is greater than the width of the SPMT modular vehicle 10. Consequently, the outer columns 23 are located outside the SPMT modular vehicle 10 and are not directly connected to it. Thus, the provision of the inner columns 24 enables the detachable installation of the tooling bracket 20 on the SPMT modular vehicle 10.

[0025] Each outer column 23 and each inner column 24 includes multiple steel barrels 25 that are vertically detachably connected, thereby making the lengths of the outer columns 23 and the inner columns 24 adjustable; it can be understood that the uppermost steel barrels 25 of the outer columns 23 and the inner columns 24 are connected to the bottom surface of the load-bearing beam 21, and the lowermost steel barrels 25 of the inner columns 24 are detachably connected to the SPMT module vehicle 10.

[0026] The bottom surface of each support beam 22 is pressed against the top surfaces of all the load-bearing beams 21, and the length direction of the support beam 22 is perpendicular to the length direction of the load-bearing beam 21, that is, the support beam 22 is supported on the load-bearing beam 21, and the top surfaces of all the support beams 22 are used to support the components.

[0027] Multiple lowering supports 30 are arranged in one-to-one correspondence with multiple external columns 23 on the tooling bracket 20. The top end of the lowering support 30 is detachably connected to the bottom end of the external column 23, and the bottom end of the lowering support 30 is detachably connected to the ground. It is further explained that when the mechanized lowering equipment is used to transport large components such as bridge 40 beams 41 at the construction site, the tooling bracket 20 is first installed on the SPMT module vehicle 10, and then the SPMT module vehicle 10 carries the tooling bracket 20 and drives under the component to be transported. The SPMT module vehicle 10 jacks up to support the component. After the component is separated from its original support, the SPMT module vehicle 10 can directly carry the component away and transfer it to a temporary site. In this way, the component can be quickly and conveniently transferred out of the construction site, avoiding long-term occupation and causing a greater impact on the traffic or environment of the construction site. In addition, there is no need to set up a full-height bracket or use traditional large-scale lifting equipment at the construction site, which reduces the investment in mechanical equipment, reduces the difficulty of construction, and improves construction efficiency and safety. A plurality of lowering supports 3 are arranged in advance in the temporary site. 0, the position of the lowering support 30 corresponds one-to-one to the outer column 23 on the tooling bracket 20, the SPMT module vehicle 10 first lowers its height to allow the tooling bracket 20 and the beam 41 thereon to completely fall on the lowering support 30, remove the lowest steel barrel 25 of the inner column 24, and then the SPMT module vehicle 10 jacks up to support the tooling bracket 20 and the beam 41 thereon so that it is separated from the lowering support 30, and remove the lowest steel barrel 25 of the outer column 23. In this way, the lowering support 30 and the height-liftable SPMT module vehicle 10 are used to alternately support the beam 22 to take turns removing the lower steel barrel 25 of the inner column 24 and the lower steel barrel 25 of the outer column 23, thereby gradually realizing the lowering of the component. The component is lowered each time by a height equal to the height of a steel barrel 25 until the component height is reduced to a preset height, so as to improve the safety and convenience of the subsequent transportation of the component.

[0028] In the above-mentioned exemplary embodiment, the combined arrangement of the SPMT modular vehicle 10, the tooling bracket 20 and the lowering support 30 enables the mechanized lowering equipment to have flexible transportation and autonomous lowering functions, thereby being able to be used for the transportation and lowering of large components such as the beam 40 41 of a bridge, thereby reducing the difficulty of construction and improving construction efficiency and safety.

[0029] refer to Figure 1As shown, in some embodiments, a plurality of parallel joints 26 are arranged spaced apart from each other on the fixture support 20 to achieve a detachable connection between two adjacent outer columns 23, between two adjacent inner columns 24, and between adjacent outer columns 23 and inner columns 24. Specifically, these parallel joints 26 are located in both directions parallel and perpendicular to the load-bearing beam 21, and each parallel joint 26 is connected between two steel drums 25. The provision of the parallel joints 26 enhances the overall structural strength of the fixture support 20, providing the entire fixture support 20 with a strong load-bearing capacity. Furthermore, the parallel joints 26 include a bolting plate and two connecting plates. The connecting plates are welded to the side walls of the outer columns 23 or inner columns 24, i.e., the side walls of the steel drum 25. The ends of the bolting plates are detachably connected to the two connecting plates by bolts, thereby achieving a detachable connection between the parallel joints 26 and the inner and outer columns 24 and 23.

[0030] refer to Figure 1 As shown, in some embodiments, the outer columns 23 and inner columns 24 are of equal height. The height of each steel drum 25 can be 50 cm, but is not limited to this, and can be flexibly adjusted based on actual needs. The height of the lowering support 30 is between the minimum vehicle height of the SPMT modular vehicle 10 before jacking and the maximum vehicle height after jacking, so that the lowering support 30 and the SPMT modular vehicle 10 can alternately support the beam 41. The height of the lowering support 30 can be 100 cm, but is not limited to this, and can be flexibly adjusted based on site conditions and actual needs.

[0031] refer to Figures 1-13 As shown, the present invention also provides a method for dismantling a bridge 40, which is performed using the aforementioned mechanized lowering equipment and includes the following steps: S1. Remove 40 auxiliary structures of the bridge, such as signboards, railings, handrails, drainage pipes, etc.

[0032] S2. Prepare three sets of mechanized lowering equipment, which includes assembling three SPMT modular vehicles 10, assembling three sets of tooling brackets 20, and connecting the inner columns 24 of the three sets of tooling brackets 20 to the three SPMT modular vehicles 10 respectively; steps S1 and S2 can be performed simultaneously.

[0033] S3. Two SPMT modular vehicles 10 drive into the bridge section to be demolished at the first end of the bridge 40 and are arranged along the length direction of the bridge 40. Another SPMT modular vehicle 10 drives into the next bridge section to be demolished on the bridge 40. That is, the bridge 40 is demolished from one end to the other in the length direction. Then, the three SPMT modular vehicles 10 are lifted so that the top surfaces of the support beams 22 on the three sets of tooling brackets 20 are pressed against the bottom surface of the beam body 41 of the bridge 40.

[0034] S4. Cut the beam 41 on the bridge to be demolished. Sever the upper and lower ends of the bridge pier 42 on the side of the bridge to be demolished that faces away from the next bridge to be demolished. It should be noted that when cutting the bottom end of the bridge pier 42, the cutting line must be close to the ground to avoid leaving a certain height of the bridge pier 42. The severed bridge pier 42 is hoisted onto a flatbed truck and transported to a designated site for crushing and slag removal. Because the beam 41 to be cut is supported by two SPMT modular vehicles 10 and their tooling supports 20, the cutting of the beam 41 and the bridge pier 42 can be carried out simultaneously, improving construction efficiency.

[0035] S5. The two SPMT modular vehicles 10 under the bridge to be demolished carry the cut beam 41 and move a preset distance, such as 50 cm, in the length direction away from the next bridge 40 to be demolished, so that the cut beam 41 is smoothly separated from the remaining part of the bridge 40. Then, the two SPMT modular vehicles 10 transport the beam 41 to the temporary site along the predetermined route.

[0036] S6. In the temporary site, a lowering support 30 is set on the ground corresponding to each outer column 23 of the two sets of tooling supports 20. The lowering support 30 and the SPMT modular vehicle 10 are used to alternately support the tooling supports 20 and the beam 41 thereon, so as to alternately remove the lower steel drums 25 of the inner columns 24 and the lower steel drums 25 of the outer columns 23, and then gradually lower the beam 41 on the SPMT modular vehicle 10 to a preset height, thereby achieving the lowering of the beam 41, thereby reducing the clearance height of the beam 41 and improving the safety and convenience of the subsequent transportation of the beam 41.

[0037] It should be noted that the ground of the temporary site needs to be treated in advance; if the temporary site is a hard ground, the ground needs to be leveled and compacted; if the temporary site is a soft soil ground, the ground needs to be leveled and compacted, gravel laid, and concrete poured in turn for hardening treatment.

[0038] S7. Two SPMT modular vehicles 10 transport the lowered beam 41 to a designated site. The designated site is provided with buttresses, typically two buttresses, with the distance between the two buttresses being less than the length of the beam 41 but greater than the outermost width of the two SPMT modular vehicles 10. The SPMT modular vehicle 10 is used to carry the beam 41 above the two buttresses. The SPMT modular vehicle 10 is lowered to place the beam 41 on the buttresses. The two SPMT modular vehicles 10 then detach from the beam 41 and drive away from the designated site. The beam 41 is crushed and slag removed within the designated site.

[0039] S8. Two SPMT modular vehicles 10 respectively drive to the next and next spans of bridge 40 to be demolished, and repeat steps S4-S7 until the beams 41 on all spans of bridge 40 are cut, transported, crushed, and slag removed. The three SPMT modular vehicles 10 provide a cyclical relay system for the demolition of bridge 40, shortening construction time and ensuring the safety of the next span while the beams 41 are being cut.

[0040] S9. After the cutting of all the bridge collapse upper beams 41 of the bridge 40 is completed, the bridge pier 42 at the rear end of the bridge 40 can be demolished on site. The reason is that the last bridge pier 42 is located at one end of the bridge, and demolishing it on site will not have a great impact on traffic or the environment, and the amount of construction waste generated will not be large; or the lower end of the bridge pier 42 at the rear end of the bridge 40 can be cut off, and the bridge pier 42 can be hoisted onto a flatbed truck and transported to a designated site for crushing and slag removal.

[0041] It should be noted that crushing the beam 41 and the bridge pier 42 at a designated site can avoid problems such as long-term road occupation, large-scale accumulation of construction waste, and environmental and noise pollution caused by crushing at the bridge 40 demolition site, and it is also convenient for accurate classification and rapid processing of crushed construction waste; when crushing, a protective net must be set up around the designated site to avoid splashing of sand and gravel, and a sprinkler truck must be equipped to sprinkle water during crushing to reduce environmental pollution and ensure green and safe construction.

[0042] The above-mentioned schematic embodiment realizes the step-by-step demolition of the auxiliary structure of the bridge 40, the beam body 41 and the bridge pier 42; by using mechanized lowering equipment, the cut beam body 41 is quickly transported to a temporary site for autonomous lowering, and then transported to a designated site for crushing and slag removal, thereby avoiding long-term occupation of the road and causing a significant impact on the traffic under the bridge and the surrounding environment, and avoiding the crushing and accumulation of large amounts of construction waste at the demolition site of the urban bridge 40, generating environmental and noise pollution, etc., improving construction efficiency and construction safety, reducing construction difficulty and construction risks, and realizing rapid demolition and green and safe construction of the bridge 40.

[0043] refer to Figure 3As shown, in some embodiments, step S1 also includes setting a protective device 50 at the auxiliary structure of the bridge 40 to be demolished; and step S4 also includes setting a protective device 50 at the position to be cut of the beam 41 of the bridge 40. The protective device 50 includes a pipe rack 51 and a dense mesh 52; the pipe rack 51 includes a bottom frame 511, two side frames 512 and a plurality of rack pipes 513. The bottom frame 511, the side frames 512 and the rack pipes 513 are all connected by a plurality of steel pipes. The bottom frame 511 is arranged below the beam 41, and the two side frames 512 are respectively located on both sides of the beam 41 in the width direction. The bottom of the side frame 512 is connected to the bottom frame 511, and the top of the side frame 512 is higher than the bridge. On the top surface of the guardrail of bridge 40, multiple pipes 513 are deployed near the guardrails on both sides of the bridge 40. The lower portions of the pipes 513 are fixed to the bridge deck, and the upper portions of the pipes 513 are connected to the side frames 512. A fine-mesh net 52 is laid on the bottom frame 511 and the two side frames 512. The distance between the side frames 512 and the sides of the beam 41 can be set to 50 cm, and the tops of the side frames 512 can be raised 50 cm above the top surface of the guardrail, thereby ensuring that the fine-mesh net 52 reliably envelops the area to be constructed. This exemplary embodiment includes protective devices 50 below and on both sides of the beam 41, effectively reducing dust pollution, flying debris, and sparks during the removal of auxiliary structures of bridge 40 and the cutting of the beam 41, thereby improving safety during construction.

[0044] refer to Figure 1 、 Figure 2 As shown, in some embodiments, in step S2, the assembly of the SPMT modular vehicle 10 includes assembling a plurality of module units 12 into a vehicle body, and assembling the vehicle body and the power unit 11. The plurality of module units 12 are also connected into a whole through data lines to ensure the synchronization of instruction reception and execution.

[0045] In step S2, the assembly of the fixture support 20 includes sequentially connecting multiple steel drums 25 with bolts to form multiple inner columns 24 and multiple outer columns 23; placing an outer column 23 at both ends of the lengthwise bottom surface of each load-bearing beam 21, and placing multiple inner columns 24 between the two outer columns 23; fully welding the topmost steel drums 25 of the outer columns 23 and the topmost steel drums 25 of the inner columns 24 to the load-bearing beam 21, with the weld leg size controlled to be ≥6mm; and placing each support beam 22 on the top surface of all load-bearing beams 21, with the support beam 22 perpendicular to the load-bearing beam 21. Furthermore, multiple top-down parallel joint structures 26 are used to connect adjacent outer columns 23, adjacent inner columns 24, and adjacent outer columns 23 and inner columns 24, further enhancing the overall structural strength and load-bearing capacity of the fixture support 20.

[0046] refer to Figure 1 、 Figure 2 、 Figure 4As shown, in some embodiments, in step S3, after the SPMT module vehicle 10 is lifted so that the support beam 22 on the tooling bracket 20 is pressed against the bottom surface of the beam body 41, it is checked whether each support beam 22 is in full contact with the bottom surface of the beam body 41. If there is a gap between the support beam 22 and the bottom surface of the beam body 41, a thin steel plate or a solid wood board is used to fill and compact it to ensure the stability and safety of the beam body 41 when it is supported, transported and lowered by mechanized lowering equipment.

[0047] refer to Figure 1 、 Figure 7-13 As shown, in some embodiments, in step S6, the following steps are further included: S61. Connect the bottoms of all lowered supports 30 to the ground of a designated site through anchor bolts to improve the stability of the lowered supports 30.

[0048] S62. The SPMT module vehicle 10 is lowered so that each outer column 23 of the tooling bracket 20 is pressed against the lowering support 30, and the lowest steel barrel 25 of the outer column 23 is connected to the lowering support 30 by bolts to ensure construction safety.

[0049] S63, release the connection between the lowest steel drum 25 of the inner column 24 and the upper steel drum 25; the SPMT module vehicle 10 lowers its height to empty the space between the lowest steel drum 25 of the inner column 24 and the upper steel drum 25, that is, to create a gap between the two layers of steel drums 25.

[0050] S64. The SPMT module cart 10 carries the steel drum 25 on the lowermost layer of the inner column 24 thereon and drives away from the area where the tooling bracket 20 is currently located; the connection between the steel drum 25 on the lowermost layer of the inner column 24 on the SPMT module cart 10 and the SPMT module cart 10 is released, and all the steel drums 25 on the SPMT module cart 10 are lifted away; then, the SPMT module cart 10 drives back to its position in step S62.

[0051] S65: The SPMT module vehicle 10 is lifted until it is pressed against the inner column 24. The lowest steel drum 25 on the inner column 24 is connected to the SPMT module vehicle 10 by bolts to ensure construction safety. The connection between the lowest steel drum 25 on the outer column 23 and the upper steel drum 25 is released. The SPMT module vehicle 10 is further lifted to remove air from the space between the lowest steel drum 25 on the outer column 23 and the upper steel drum 25, that is, to create a gap between the two layers of steel drums 25.

[0052] S66, the SPMT module vehicle 10 carries the existing tooling support 20 and the beam 41 thereon and drives away from the area where the lowering support 30 is located; the connection between the lowest steel drum 25 of the outer column 23 and the lowering support 30 is released, and the steel drum 25 on all the lowering supports 30 are lifted away.

[0053] S67: The SPMT modular vehicle 10 is lowered, and the amount of the height reduction does not exceed the height of one layer of steel drums 25. It is determined whether the beam 41 on the SPMT modular vehicle 10 has been lowered to the preset height. If so, step S7 is executed to transport the lowered beam 41 to the designated site. If not, the SPMT modular vehicle 10 returns to its position in step S62, and steps S62 to S67 are continued until the beam 41 on the SPMT modular vehicle 10 is lowered to the preset height.

[0054] The above-mentioned illustrative embodiment refines the steps of lowering the beam body 41 using mechanized lowering equipment, realizes the layer-by-layer lowering of the beam body 41, and the amount of each lowering is equivalent to the height of the steel drum 25. It can also ensure the stability of the beam body 41 and the tooling bracket 20 during the lowering process, avoid the possibility of the beam body 41 or the steel drum 25 slipping during the lowering process, and ensure construction safety.

[0055] Through the description of multiple embodiments of the mechanized lowering equipment and the bridge 40 demolition construction method of the present invention, it can be seen that the present invention has at least one or more of the following advantages: 1) The mechanized lowering equipment is cleverly designed, highly practical, and reusable, with flexible transportation and autonomous lowering capabilities. When used in the demolition of large components such as the beam 41 of bridge 40, the mechanized lowering equipment can replace traditional large-scale lifting equipment, effectively reducing the impact of the complex surrounding environment on the demolition of bridge 40, reducing the investment in mechanical equipment, lowering the difficulty of construction, improving construction efficiency, and enhancing construction safety and reliability.

[0056] 2) By using mechanized lowering equipment to carry out the demolition of Bridge 40, the cut beam 41 is quickly transported to a temporary site for autonomous lowering, and then transported to a designated site for crushing and slag removal. This greatly reduces the impact of the demolition of Bridge 40 on traffic under the bridge and the surrounding environment, significantly reduces the construction difficulty and construction risks, improves the efficiency of the demolition of Bridge 40, reduces the workload and construction period, and makes the demolition of Bridge 40 safer, more environmentally friendly and more efficient, which has high promotion value.

[0057] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons of ordinary skill in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should be included in the scope of the technical solutions for which protection is sought.

Claims

1. A mechanized lowering equipment, characterized in that: It includes an SPMT module vehicle, a tooling bracket and a plurality of lowering supports; wherein the tooling bracket includes: Multiple load-bearing beams arranged in parallel; each load-bearing beam is connected to an outer column at both ends of the length direction of the bottom surface, the distance between the two outer columns is greater than the width of the SPMT module vehicle, and multiple inner columns are arranged between the two outer columns, the top ends of the inner columns are connected to the load-bearing beam, and the bottom ends of the inner columns are detachably connected to the SPMT module vehicle; each of the outer columns and inner columns includes multiple steel drums that are detachably connected vertically; Multiple support beams arranged in parallel; the bottom surface of each support beam is pressed against the top surface of all the load-bearing beams and is perpendicular to the load-bearing beams, and the top surfaces of all the support beams are used to support the components; The plurality of lowering supports correspond one to one with the plurality of external columns on the tooling bracket, the top end of the lowering support is detachably connected to the bottom end of the external column, and the bottom end of the lowering support is detachably connected to the ground.

2. The mechanized lowering equipment according to claim 1, characterized in that: The SPMT modular vehicle includes a vehicle body and a power unit connected to one end of the vehicle body. The vehicle body includes a plurality of module units connected to each other.

3. The mechanized lowering equipment according to claim 1, characterized in that: Two adjacent outer columns, two adjacent inner columns, and adjacent outer columns and inner columns on the tooling bracket are all detachably connected through a plurality of parallel connection structures spaced apart from top to bottom.

4. The mechanized lowering equipment according to claim 3, characterized in that: The flat connection structure includes a bolted plate and two connecting plates. The connecting plate is welded to the side wall of the outer column or the inner column. Both ends of the bolted plate are detachably connected to the two connecting plates by bolts.

5. The mechanized lowering equipment according to claim 1, characterized in that: The outer pillars and the inner pillars have the same height, and the height of the lowering support is between the minimum vehicle body height before the SPMT module vehicle is lifted and the maximum vehicle body height after the vehicle is lifted.

6. A bridge demolition construction method, characterized in that: The method is carried out using the mechanized lowering equipment according to any one of claims 1 to 5, comprising the following steps: S1. Demolition of bridge ancillary structures; S2. Preparing three sets of the mechanized lowering equipment, which includes assembling three SPMT modular vehicles, assembling three sets of tooling brackets, and connecting the inner columns of the three sets of tooling brackets to the three SPMT modular vehicles respectively; S3. Two SPMT modular vehicles drive into the bridge section to be demolished at the head end of the bridge, and another SPMT modular vehicle drives into the next bridge section to be demolished. Then, the three SPMT modular vehicles are lifted so that the top surfaces of the support beams on the three sets of tooling brackets are pressed against the bottom surface of the bridge beam body. S4. Cutting the beams on the bridge to be demolished by cutting; cutting off the upper and lower ends of the bridge pier on the side of the bridge to be demolished away from the next bridge to be demolished, hoisting the bridge pier onto a flatbed truck and transporting it to a designated site for crushing and slag removal; S5. The two SPMT modules under the bridge to be demolished carry the cut beams and move them a preset distance away from the next bridge to be demolished. Then, they transport the beams to a temporary site along a predetermined route. S6. In the temporary site, a lowering support is installed on the ground corresponding to each outer column of the two sets of tooling supports. The lowering support and the SPMT modular vehicle are used to alternately support the tooling supports and the beams thereon, so as to alternately remove the lower steel drums of the inner columns and the lower steel drums of the outer columns, thereby gradually lowering the beams on the SPMT modular vehicle to a preset height. S7. Two SPMT modular vehicles transport the lowered beam to a designated site. The designated site is provided with support piers. After placing the beam on the support piers, the two SPMT modular vehicles leave the designated site. The beam is then crushed and slag removed. S8, the two SPMT modular vehicles respectively drive into the next bridge to be demolished and the next bridge to be demolished, and repeat steps S4 to S7 until the beams on all bridge spans are cut, transported, crushed and slag removed; S9. Destroy the bridge pier at the rear end of the bridge on site; or cut off the lower end of the bridge pier at the rear end of the bridge, lift the bridge pier onto a flatbed truck and transport it to a designated site for crushing and slag removal.

7. The bridge demolition construction method according to claim 6, characterized in that: Step S1 also includes setting a protective device at the bridge auxiliary structure to be demolished; step S4 also includes setting a protective device at the position to be cut of the bridge beam; the protective device includes a pipe rack and a dense mesh, the pipe rack includes a bottom frame, two side frames and a plurality of rack pipes, the bottom frame, side frames and rack pipes are all connected by a plurality of steel pipes, the bottom frame is arranged below the beam, the two side frames are respectively located on both sides outside the beam in the width direction, the bottom of the side frame is connected to the bottom frame, the top of the side frame is higher than the top surface of the guardrail of the bridge, a plurality of rack pipes are arranged near the guardrails on both sides of the bridge, the lower part of the rack pipe is fixed on the bridge deck, and the upper part of the rack pipe is connected to the side frame; the dense mesh is laid on the bottom frame and the two side frames.

8. The bridge demolition construction method according to claim 6, characterized in that: In step S2, the assembly of the tooling bracket includes: Connecting the plurality of steel drums in sequence by bolts to form a plurality of inner columns and a plurality of outer columns respectively; An outer column is placed at both ends of the bottom surface of each load-bearing beam in the longitudinal direction, and a plurality of inner columns are placed between the two outer columns, and the uppermost steel barrels of the outer columns and the inner columns are fully welded to the load-bearing beam by welding; Each of the support beams is placed on the top surface of all the load-bearing beams, and the support beams are perpendicular to the load-bearing beams.

9. The bridge demolition construction method according to claim 6, characterized in that: In step S3, after the roof of the SPMT module is raised so that the support beams on the tooling bracket are pressed against the bottom surface of the beam body, check whether each of the support beams is in full contact with the bottom surface of the beam body. If there is a gap between the support beams and the bottom surface of the beam body, use thin steel plates or solid wood boards to fill and compact them.

10. The bridge demolition construction method according to claim 6, characterized in that: In step S6, the following steps are also included: S61, connecting the bottoms of all the lowering supports to the ground through anchor bolts; S62: The SPMT modular vehicle is lowered so that each outer column of the tooling bracket is pressed against the lowering support, and the lowest steel drum of the outer column is connected to the lowering support by bolts; S63, releasing the connection between the lowest steel drum on the inner column and the upper steel drum; lowering the SPMT module vehicle to remove the space between the lowest steel drum on the inner column and the upper steel drum; S64, the SPMT module vehicle drives away from the area where the tooling support is located; the connection between the lowest steel drum on the inner column of the SPMT module vehicle and the SPMT module vehicle is released, and the steel drum on the SPMT module vehicle is lifted away; the SPMT module vehicle returns to its position in step S62; S65, the SPMT module vehicle is lifted until it is pressed against the inner column; the connection between the lowest steel drum of the outer column and the steel drum above it is released; the SPMT module vehicle is further lifted to clear the space between the lowest steel drum of the outer column and the steel drum above it; S66. The SPMT module vehicle carries the tooling bracket and the beam thereon and moves away from the area where the lowering support is located; the connection between the lowest steel drum on the outer column and the lowering support is released, and the steel drum on the lowering support is lifted away; S67: The SPMT modular vehicle is lowered, and the amount of the height reduction does not exceed the height of one layer of steel drums. It is determined whether the beam on the SPMT modular vehicle has been lowered to the preset height. If so, step S7 is executed. If not, the SPMT modular vehicle returns to its position in step S62, and steps S62 to S67 are continued until the beam on the SPMT modular vehicle is lowered to the preset height.

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