Overwater cast-in-place simply supported beam dismantling device

Abstract

The utility model discloses an overwater cast-in-place simply supported beam dismantling device which is suitable for the field of bridge dismantling. Comprising a buoyancy tank platform for providing overwater operation support and transportation in the overwater cast-in-place simply supported beam dismantling process, an SPMT module transport vehicle capable of adjusting the height of a vehicle body, a bracket with the bottom capable of allowing the SPMT module transport vehicle to enter, and a hydraulic lifting device with the height capable of being increased to a preset height so that the to-be-dismantled cast-in-place simply supported beam can be separated from a support. Compared with an existing blasting device or a floating crane dismantling device, the device has the advantages that modular design and assembly are efficient, the device can be repeatedly used for other bridge engineering, the construction cost is low, the whole beam body is dismantled through hydraulic synchronous jacking, chippings are prevented from polluting water, and environmental protection and construction safety are both achieved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology on water, specifically to a device for dismantling a cast-in-place simply supported beam on water. Background Technology

[0002] With the rapid development of my country's transportation industry, some old bridges can no longer meet new transportation demands due to limitations in design standards, construction techniques, and building materials. More and more bridges are facing demolition or reconstruction. Among these, simply supported beam bridges are the most widely used type of beam bridge. Their structural characteristic of being simply supported at both ends by piers necessitates the simultaneous control of jacking force and horizontal displacement during demolition, placing extremely high demands on the structural stability of the construction equipment.

[0003] Currently, the dismantling of simply supported beams on water mainly relies on two types of devices: 1. Blasting and breaking devices, which break the beam through drilling and blasting, but the transmission of the shock wave is uncontrollable and can easily damage the original piers that need to be preserved. The debris falling into the water causes excessive suspended solids in the water. 2. Floating crane dismantling devices, which are limited by their integral steel structure frame, take a long time to transport and assemble, and have a large swing amplitude during hoisting, which cannot meet the stability requirements of overall dismantling. Segmented cutting requires the installation of temporary support frames at the bottom of the beam, and the concrete and metal debris during cutting can also pollute the water.

[0004] In summary, a device for dismantling simply supported beams cast in place on water needs to be proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a device for dismantling cast-in-place simply supported beams on water, so as to solve the problems mentioned in the background art, such as the easy damage to the original bridge piers that need to be preserved, the long time consumption of transportation and assembly, and the pollution of water bodies.

[0006] To achieve the above objectives, this utility model provides a device for dismantling a cast-in-place simply supported beam on water, including a floating platform, a bracket, a hydraulic lifting device, and an SPMT module transport vehicle.

[0007] The floating platform is used to provide operational support for the dismantling process of cast-in-place simply supported beams on water, as well as to transport the dismantled cast-in-place simply supported beams.

[0008] The SPMT module transport vehicle is height adjustable.

[0009] The bracket includes a bracket platform and support legs. The support legs are positioned below the bracket platform, and their upper ends are fixedly connected to the bottom of the bracket platform. The support legs include a first support leg and a second support leg, which are spaced apart below the bracket platform, with a reserved bottom space between them to accommodate the dimensions of the SPMT module transport vehicle. When the SPMT module transport vehicle is positioned within this bottom space, the lower ends of the first and second support legs can be disengaged from the surface of the support platform by adjusting the vehicle's height.

[0010] The hydraulic lifting device is detachably installed above the bracket platform, and the lifting height of the hydraulic lifting device can be adjusted to detach the cast-in-place simply supported beam to be demolished from the support.

[0011] Preferably, the floating platform comprises multiple modular steel floating boxes, which are connected by bolts to form the floating platform. Its overall strength and stability meet the anti-overturning stability and load-bearing requirements when the hydraulic lifting device lifts the cast-in-place simply supported beam.

[0012] Preferably, the lower end of the support leg of the bracket that contacts the floating platform is provided with a lower connecting hole, the upper surface of the bracket platform that contacts the hydraulic lifting device is provided with an upper connecting hole, the floating platform and the bracket are fixedly connected to the lower connecting hole by bolts, and the hydraulic lifting device and the bracket are fixedly connected to the upper connecting hole by bolts.

[0013] Preferably, there are two brackets, namely a first bracket and a second bracket. The first bracket and the second bracket have the same structure and are symmetrically distributed on both sides of the floating platform.

[0014] Preferably, the number of hydraulic lifting devices is eight, of which four hydraulic lifting devices are arranged at the four corners of the first bracket corresponding to the bracket platform, and the remaining four hydraulic lifting devices are arranged at the four corners of the second bracket corresponding to the bracket platform.

[0015] Preferably, each of the eight hydraulic lifting devices is provided with a support plate at its top, and the shape of the top surface of the support plate matches the outline of the bottom surface of the cast-in-place simply supported beam.

[0016] This utility model has the following advantages over the prior art:

[0017] 1. By combining pontoons, brackets, hydraulic lifting devices and SPMT modular transport vehicles, the entire process of dismantling simply supported beams can be mechanized, avoiding the high-risk operations of traditional blasting or floating crane segmented cutting, effectively shortening the construction period and improving operational safety.

[0018] 2. The hydraulic lifting device works synchronously to prevent cracking or structural deformation of the beam due to uneven stress during dismantling and transportation. Combined with the support plate set on the top, it effectively improves the safety during dismantling and transportation.

[0019] 3. The application of modular steel pontoons and SPMT modular transport vehicles enables this utility model to adapt to various construction environments, can be reused in other bridge projects, improve equipment utilization, and reduce construction costs.

[0020] 4. By jacking up and dismantling the cast-in-place simply supported beam as a whole, the dust and noise pollution and damage to the original bridge piers generated by blasting are avoided. It also avoids water pollution caused by concrete or metal debris generated by traditional processes, which is environmentally friendly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure for dismantling a cast-in-place simply supported beam using this utility model;

[0023] Figure 3 This is a schematic diagram illustrating the state of a cast-in-place simply supported beam using the jacking method of this utility model;

[0024] Figure 4 This is a schematic diagram showing the state of the cast-in-place simply supported beam after it has been lifted using this utility model and then fallen back down.

[0025] Figure 5 This is a schematic diagram of the structure of the transfer dock during the transfer of cast-in-place simply supported beams using this utility model;

[0026] Figure 6 This is a schematic diagram of the SPMT module transport vehicle used in this utility model for transporting cast-in-place simply supported beams.

[0027] Figure 7 This is a schematic diagram of placing a cast-in-place simply supported beam onto a temporary support using this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1—Floating box; 11—Modular steel floating box; 2—Bracket;

[0030] 21—Bracket platform; 22—Supporting leg; 23—First supporting leg;

[0031] 24—Second support leg; 25—First bracket; 26—Second bracket;

[0032] 27—Lower connecting hole; 28—Upper connecting hole; 3—Hydraulic lifting device;

[0033] 4—SPMT module transport vehicle; 5—cast-in-place simply supported beam; 61—temporary support pier;

[0034] 62—Original bridge pier; 7—Transfer wharf; 8—Supporting plate;

[0035] 9—Bottom space; 10—Support. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] like Figures 1 to 7 As shown, this utility model provides a device for dismantling a cast-in-place simply supported beam on water. The dismantling device includes a floating platform 1, a bracket 2, a hydraulic lifting device 3, and a Self-Propelled Modular Transporter 4 (hereinafter referred to as "SPMT modular transporter"). The floating platform 1 is used to provide operational support for the dismantling process of the cast-in-place simply supported beam on water, and to transport the dismantled cast-in-place simply supported beam. The SPMT modular transporter 4 is an existing product, which has the function of adjusting the vehicle height. The bracket 2 includes a bracket platform 21 and support legs 22. The support legs 22 are located below the bracket platform 21, and the upper end of the support legs 22 is fixedly connected to the bottom of the bracket platform 21. The support legs 22 include a first support leg 23 and a second support leg 24. The first support leg 23 and the second support leg 24 are spaced apart below the bracket platform 21, and a bottom space 9 adapted to the body size of the SPMT modular transporter 4 is reserved between the first support leg 23 and the second support leg 24. When the SPMT module transport vehicle 4 is located in the bottom space 9, the SPMT module transport vehicle can adjust its height to detach the lower ends of the first support leg 23 and the second support leg 24 from the surface of the support platform. In this embodiment, the support platform is a floating platform 1. If this device is used in other scenarios, the support platform can be the ground, the surface of a ship, or other platforms used to support the support bracket 2. The hydraulic lifting device 3 is detachably installed above the bracket platform 21, and the lifting height of the hydraulic lifting device 3 can be adjusted to detach the cast-in-place simply supported beam 5 to be dismantled from the support 10.

[0038] SPMT module transport vehicles can be either semi-drive or trailer-mounted. The semi-drive type is partially axle-driven, while the trailer-mounted type is towed by a tractor unit; both are highly economical. The hydraulic lifting device can be a telescopic cylinder hydraulic lift with a multi-stage telescopic structure and a travel range of 5-20m, or a scissor lift platform, which is highly mobile and adaptable to various working environments. With the hydraulic lifting device 3 mounted on the bracket 2, the cast-in-place simply supported beam 5 to be dismantled can be lifted away from the original support 10, allowing for the complete dismantling of the cast-in-place simply supported beam 5, avoiding water pollution caused by concrete or metal debris.

[0039] like Figure 1 As shown, the floating platform 1 comprises multiple modular steel floating boxes 11, which are connected by bolts to form the floating platform 1. The overall strength and stability of the floating platform 1 meet the anti-overturning stability and load-bearing requirements when the hydraulic lifting device 3 lifts the cast-in-place simply supported beam 5. By using modular steel floating boxes 11 to splice the floating platform 1, the working platform can adapt to various construction environments and can be reused in other bridge construction processes.

[0040] like Figure 3 As shown, the lower end of the support leg 22 of the bracket 2 that contacts the floating platform 1 is provided with a lower connecting hole 27, and the upper surface of the bracket platform 21 of the bracket 2 that contacts the hydraulic lifting device 3 is provided with an upper connecting hole 28. The floating platform 1 and the bracket 2 are fixedly connected to the lower connecting hole 27 by bolts, and the hydraulic lifting device 3 and the bracket 2 are fixedly connected to the upper connecting hole 28 by bolts.

[0041] The bracket 2 is fixed to the floating platform 1 by means of bolts and connecting holes for detachable connection. The hydraulic lifting device is fixed to the bracket platform 21 of the bracket 2. This not only makes it convenient for the SPMT module transport vehicle to transport the bracket 2 and its upper structure together, improving work efficiency, but also facilitates the initial transportation of the device and saves transportation costs.

[0042] like Figure 2 As shown, there are two brackets 2, namely the first bracket 25 and the second bracket 26. The first bracket 25 and the second bracket 26 have the same structure and are symmetrically distributed on both sides of the floating platform 1. The symmetrical distribution of the first bracket 25 and the second bracket 26 on both sides of the floating platform 1 not only provides stable support but also ensures the balance and stability of the floating platform 1 on the water surface.

[0043] In this embodiment, there are eight hydraulic lifting devices 3. Four hydraulic lifting devices 3 are located at the four corners of the first bracket 25 corresponding to the bracket platform 21, and the remaining four hydraulic lifting devices 3 are located at the four corners of the second bracket 26 corresponding to the bracket platform 21. The hydraulic lifting devices 3 are evenly distributed on the first bracket 25 and the second bracket 26, and are lifted synchronously during operation. This ensures that the cast-in-place simply supported beam 5 is subjected to uniform stress during lifting, dismantling, and transportation, avoiding beam cracking or structural deformation due to uneven stress, and improving the safety of the operation process.

[0044] In this embodiment, each of the eight hydraulic lifting devices 3 is equipped with a support plate 8 at its top. The top surface shape of the support plate 8 matches the bottom contour of the cast-in-place simply supported beam 5. The use of the support plate 8 increases the support area of ​​the hydraulic lifting device 3 on the cast-in-place simply supported beam 5 during lifting, reduces the probability of beam displacement and breakage during transportation, and improves the safety of the operation.

[0045] In this embodiment, the floating platform 1 is moved on the water by tugboat towing. The floating platform 1 primarily moves between the transfer wharf 7 and the bridge site where the cast-in-place simply supported beam to be dismantled is located. The tugboat and the floating platform 1 are detachably connected by a buffer chain. Tugboat towing technology is adaptable to various complex environments such as narrow waters, shallows, and open seas, and its maneuverability is also suitable for floating operation platforms that require repositioning. Towing the floating platform 1 by tugboat avoids traditional hoisting and transfer processes, reducing transportation complexity and time costs. Both ends of the buffer chain are equipped with shackles, which connect the tugboat and the floating platform 1 respectively, enhancing the flexibility and convenience during operation.

[0046] like Figure 5 As shown, the modular steel pontoons 11, after forming the pontoon platform 1, are fixedly attached to one side of the transfer wharf 7. The brackets 2 and hydraulic lifting devices 3 are transported and assisted in the installation on the transfer wharf 7. After the dismantling device is assembled, it is towed by a tugboat to the space between the two original piers 62 supporting the cast-in-place simply supported beam 5 to be dismantled. Temporary supports 61 are provided on the transfer wharf 7 to support the cast-in-place simply supported beam 5 after dismantling, providing support for its dismantling. The temporary supports 61 can be height-adjustable steel supports with a rubber pad layer on top. By placing the temporary supports 61 within the transfer wharf 7, the distance from water to land for dismantling and transfer is shortened, thereby reducing operating costs and improving work efficiency.

[0047] In this embodiment, the demolition device is used, and the steps for demolishing the cast-in-place simply supported beam are as follows:

[0048] Step 1, such as Figure 1 As shown, based on the actual construction area size and load-bearing requirements, modular steel pontoons 11 are assembled into a pontoon platform 1. The pontoon platform 1 serves as a support on the water, and a bracket 2 and a hydraulic lifting device 3 are installed. Figure 2 As shown, the entire structure is towed by a tugboat to the area between the two original piers 62 supporting the cast-in-place simply supported beam 5 to be dismantled. After anchoring and positioning, the centerline of the floating platform 1 should be aligned with the axis of the cast-in-place simply supported beam 5, with an error not exceeding 100mm.

[0049] Step 2: Control the hydraulic lifting device 3 to synchronously lift at a speed not exceeding 50mm / min. Figure 3 As shown, ensure that all supports of the cast-in-place simply supported beam 5 are released simultaneously, so that the beam is completely separated from the support 10.

[0050] Step 3: Use tugboats to tow the floating platform 1, bracket 2, hydraulic lifting device 3, and cast-in-place simply supported beam 5 laterally along the bridge.

[0051] Step 4, as follows Figure 4 As shown, the hydraulic lifting device 3 is operated to lower the cast-in-place simply supported beam 5 to the bearing height.

[0052] Step 5, as follows Figure 5 As shown, the floating platform 1, bracket 2, hydraulic lifting device and cast-in-place simply supported beam 5 are towed to the transfer terminal 7 by tugboat. After docking, the floating platform 1 is fixed to the transfer terminal 7 by cable.

[0053] Step Six, as Figure 6 As shown, the SPMT module transport vehicle 4 moves to the bottom of the bracket 2, disconnects the bracket 2 from the floating platform 1, and separates the bracket 2 from the floating platform 1 by adjusting the height of the SPMT module transport vehicle 4. Then, the bracket 2, the hydraulic lifting device 3, and the cast-in-place simply supported beam 5 are transferred as a whole to the land.

[0054] Step 7, as follows Figure 7 As shown, the cast-in-place simply supported beam 5 is placed on the temporary support 61 by controlling the hydraulic lifting device 3 and adjusting the height of the temporary support 61. After removing the bracket 2, hydraulic lifting device 3 and SPMT module transport vehicle 4, the bridge is dismantled.

[0055] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A device for removing a cast-in-place simple supported beam on water, characterized in that, The invention relates to a floating platform (1) for providing working support for the demolition of cast-in-place simple supported beam (5) and transporting the demolished cast-in-place simple supported beam (5). SPMT module transport vehicle (4) capable of adjusting the height of the vehicle body. A bracket (2) comprising a bracket platform (21) and support legs (22) arranged below the bracket platform (21) and fixedly connected to the bottom of the bracket platform (21) at the upper end of the support legs (22), the support legs (22) comprising first support legs (23) and second support legs (24) arranged below the bracket platform (21) at intervals, a bottom space (9) being reserved between the first support legs (23) and the second support legs (24), the bottom space (9) being adapted to the size of the vehicle body of the SPMT module transport vehicle (4) and allowing the first support legs (23) and the second support legs (24) to be separated from the surface of the bearing platform when the SPMT module transport vehicle (4) is located in the bottom space (9) by adjusting the height of the vehicle body. A hydraulic lifting device (3) detachably mounted above the bracket platform (21) and capable of adjusting the lifting height to separate the cast-in-place simple supported beam (5) to be demolished from the support (10). The floating platform (1) comprises a plurality of modular steel pontoons (11) connected by bolts to form the floating platform (1).

2. The device for removing cast-in-situ simple supported beam over water according to claim 1, characterized in that: The lower end of the support legs (22) in contact with the floating platform (1) is provided with a lower connecting hole (27), and the upper surface of the bracket platform (21) in contact with the hydraulic lifting device (3) is provided with an upper connecting hole (28), the floating platform (1) and the bracket (2) are fixedly connected by bolts and the lower connecting hole (27), and the hydraulic lifting device (3) and the bracket (2) are fixedly connected by bolts and the upper connecting hole (28).

3. The device for removing cast-in-situ simple supported beam over water according to claim 2, characterized in that: The number of brackets (2) is two, the two brackets (2) are a first bracket (25) and a second bracket (26), the first bracket (25) and the second bracket (26) have the same structure, and the first bracket (25) and the second bracket (26) are distributed on both sides of the floating platform (1).

4. The device for removing cast-in-situ simple supported beam over water according to claim 1, characterized in that: The number of hydraulic lifting devices (3) is eight, four of which are arranged on the four corners of the bracket platform (21) corresponding to the first bracket (25), and the remaining four are arranged on the four corners of the bracket platform (21) corresponding to the second bracket (26).

5. The device for removing cast-in-situ simple supported beam over water according to claim 4, characterized in that: The top end of each of the eight hydraulic lifting devices (3) is provided with a supporting plate (8), and the top surface of the supporting plate (8) is matched with the bottom surface profile of the cast-in-place simple supported beam (5).

6. The device for removing cast-in-situ simple supported beam over water according to claim 5, characterized in that: ​

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