Device for bridge prepressing
By designing a device for bridge prepression, using water pumps and hose systems to achieve accurate prepression, and releasing the river water after prepression is completed, the problems of time-consuming and labor-intensive and heavy burden on the traditional sandbag prepression method are solved, and the effects of accurate prepression and rapid operation are achieved.
Patent Information
- Application Number
- CN202421830155.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In bridge construction, the traditional sandbag prepression method is time-consuming and labor-intensive, and the sandbag shape is not fixed, it is difficult to load and unload, and it is easy to collapse. The crane needs to lift a large amount of water when lifting the sandbag, which increases the burden on the crane.
A device for pre-pressing of bridges is designed, including a box, a water pump, a water inlet hose and a water outlet hose. By setting up a water inlet pipe head and a filter in the river channel under the bridge, the water pump is used to pump the water to the required amount, and accurately pre-pressure is achieved, and after the pre-pressure is completed, the water is put back to the river channel to reduce the burden on the crane.
It realizes precise control of pre-pressure weight, reduces the burden on the crane, fast collection and release, reasonable structure, easy to operate, strong practicality, and energy saving and consumption reduction.
Smart Images
Figure CN222575285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bridge preloading tool, in particular to a device used for bridge preloading. Background Art
[0002] In the construction process of continuous box girder bridges, the stability and deformation of the cast-in-place support are key parameters for bridge construction stability and safety. In order to ensure that the support meets the construction technical requirements, it is necessary to test the stability of the support through pre-compression tests to basically eliminate the inelastic deformation of the support.
[0003] The preloading weight is configured according to 1.2 times the weight of the support bearing after pouring. The preloading is implemented at three levels: 50%, 75% and 100% of the preloading amount. After each level of settlement is stable, the next level of loading is carried out. During the loading process, the elastic and inelastic deformation of the support and foundation under the design constant load is observed to obtain relevant test data, and the support structure is adjusted in time through the test data. The traditional preloading method is generally sandbag preloading, which requires a large number of sandbags to be lifted by a crane, which is not only time-consuming and labor-intensive, but also difficult to load and unload due to the lack of a fixed shape of sandbags. Sandbags are prone to collapse when stacked too high. Utility Model Content
[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a device for prestressing a bridge. A plurality of the devices are arranged on a box-girder bridge that needs prestressing. The ends of the water inlet hoses provided with the plurality of the devices are placed in a river channel under the bridge according to the weight required for prestressing. The water pump is turned on to draw water from the river channel to the required amount. After the prestressing is completed, the water in the box can be returned to the river channel. This achieves not only accurate prestressing weight, but also the fact that a crane does not need to lift the water in the box when lifting the device, thereby reducing the burden on the crane and allowing quick retraction and release.
[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0006] A device for prestressing a bridge comprises a box body, which is a rectangular structure. A closed cavity is arranged in the box body. A water pump with a water outlet end penetrating the cavity is arranged at the upper end of one side wall of the box body. The water inlet end of the water pump is connected to one end of a water inlet hose. The water inlet hose is coiled on the side wall of the box body. A water outlet pipe with one end penetrating the cavity is arranged at the lower end of one side wall of the box body. The other end of the water outlet pipe is connected to one end of the water outlet hose. The water outlet hose is coiled on the side wall of the box body. A valve is arranged on the water outlet pipe. A support frame is arranged at the center position of the top of the box body. Two through grooves are arranged on the support frame at intervals. Overflow outlets penetrating the cavity are respectively arranged on opposite sides of the top of the box body.
[0007] The device for bridge preloading is provided with a water inlet pipe head at the other end of the water inlet hose, and a filter screen is provided at the pipe mouth of the water inlet pipe head.
[0008] The device for bridge preloading is also provided with a hook A at the upper end of one side wall of the box body, and the water inlet hose is coiled on the hook A.
[0009] The device for bridge preloading is also provided with a hook B at the lower end of one side wall of the box body, and the water outlet hose is coiled on the hook B.
[0010] The device for bridge prestressing is also provided with a transparent observation window penetrating the top and bottom of the box body on one side wall of the box body, and a scale is provided on the transparent observation window.
[0011] The device for bridge prestressing is provided with a base at the bottom of the box body, wheels are provided at the four corners of the bottom of the base, and a rotating shaft is passed between two corresponding wheels.
[0012] The device for preloading a bridge is provided with a wheel seat between each wheel and the base.
[0013] The device for bridge preloading is provided with hooks at the four corners of the top of the box body.
[0014] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0015] The device for preloading a bridge described in the utility model is achieved by arranging a plurality of the devices on a box-girder bridge that needs preloading, placing the ends of the water inlet hoses of the plurality of the devices in the river channel according to the weight required for preloading, turning on the water pump to draw water from the river channel to the required amount, and returning the water in the box to the river channel after the preloading is completed, thereby achieving not only accurate preloading weight but also no need for a crane to lift the water in the box when lifting the device, thereby reducing the burden on the crane and enabling rapid retraction and release. The utility model has the advantages of reasonable structure, easy operation, strong practicality, energy saving and consumption reduction, full use of the on-site environment, and outstanding innovation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the utility model when in use.
[0018] In the figure: 1. overflow port; 2. cavity; 3. through groove; 4. support frame; 5. water inlet hose; 6. hook A; 7. water inlet pipe head; 8. water pump; 9. valve; 10. wheel; 11. water outlet pipe; 12. base; 13. water outlet hose; 14. transparent observation window; 15. hook B; 16. rotating shaft; 17. wheel seat; 18 box; 19. hook. DETAILED DESCRIPTION
[0019] The present invention can be explained in more detail through the following embodiments. The present invention is not limited to the following embodiments. The purpose of disclosing the present invention is to protect all changes and improvements within the scope of the present invention.
[0020] Combined with Figure 1 The device for prestressing a bridge comprises a box body 18, which is a rectangular structure. A closed cavity 2 is arranged in the box body 18. A water pump 8 with a water outlet end penetrating the cavity 2 is arranged at the upper end of one side wall of the box body 18. The water inlet end of the water pump 8 is connected to one end of a water inlet hose 5. A hook A6 is also arranged at the upper end of one side wall of the box body 18. The water inlet hose 5 is coiled on the hook A6. A water inlet pipe head 7 is arranged at the other end of the water inlet hose 5. A filter is arranged at the pipe mouth of the water inlet pipe head 7. A water outlet pipe 11 with one end penetrating the cavity 2 is arranged at the lower end of one side wall of the box body 18. The other end of the water outlet pipe 11 is connected to one end of a water outlet hose 13. A valve 9 is arranged on the water outlet pipe 11. A hook B15 is also provided at the end, and a water outlet hose 13 is coiled on the hook B15. A support frame 4 is provided at the center position of the top of the box body 18, and two through grooves 3 are provided on the support frame 4 at intervals. Overflow ports 1 that pass through the cavity 2 are respectively provided on the opposite sides of the top of the box body 18. A transparent observation window 14 that passes through the top and bottom of the box body 18 is also provided on one side wall of the box body 18, and a scale is provided on the transparent observation window 14. A base 12 is provided at the bottom of the box body 18, and wheels 10 are provided at the four corners of the bottom of the base 12. A rotating shaft 16 is passed between the corresponding two wheels 10, and a wheel seat 17 is provided between each wheel 10 and the base 12. Hooks 19 are provided at the four corners of the top of the box body 18.
[0021] To implement the bridge preloading device of the utility model, the water pump 8 is connected to the switch and the power supply respectively. When in use, the four hooks 19 are hooked with cables, and the device is hooked and hoisted to the continuous box girder bridge that needs preloading by a crane. Figure 2, multiple devices can be arranged side by side as needed. When the required preloading weight is still not reached after a layer is fully laid, another device can be placed on top of two adjacent devices arranged side by side, so that the two rotating shafts 16 provided in the upper device are respectively stuck in the two adjacent through grooves 3 between the two adjacent devices, and the three devices form a stable triangular structure. After another device is arranged on the top between each two adjacent devices of the first layer, a third layer of devices can be added on top of the second layer of devices according to the required preloading weight. When the required number of devices reaches the requirement, all valves 9 of the multiple devices are closed, the water inlet hoses 5 provided in the multiple devices are unfolded and the water inlet pipe heads 7 provided at the other ends of the multiple devices are placed in a continuous In the river channel under the box girder bridge, the filter screen provided at the mouth of the water inlet pipe head 7 can effectively prevent the suction of sand and stones, and multiple water pumps 8 provided in the device are turned on. The pre-compression weight is calculated according to the dead weight of the device and the water storage volume in the cavity 2 displayed on the transparent observation window 14 until the required pre-compression weight is reached, and the multiple water pumps 8 are turned off, and the multiple water inlet hoses 5 are respectively coiled up; after the pre-compression is completed, the ends of the multiple water outlet hoses 13 are extended out of the continuous box girder bridge, and the multiple valves 9 are opened to discharge the river water sucked into the multiple cavities 2 into the river channel again. The empty device has the effect of being easily lifted off, and the device can be used many times. Since the bottom of the box 18 of the device is provided with wheels 10, it can also be pushed manually if there is a flat road surface.
[0022] The parts not described in detail in this utility model are prior art.
Claims
1. A device for preloading a bridge, characterized by: The invention comprises a box body (18), which is a rectangular structure. A sealed cavity (2) is provided in the box body (18). A water pump (8) whose water outlet end passes through the cavity (2) is provided at the upper end of a side wall of the box body (18). The water inlet end of the water pump (8) is connected to one end of a water inlet hose (5). The water inlet hose (5) is coiled on the side wall of the box body (18). A water outlet pipe (11) whose one end passes through the cavity (2) is provided at the lower end of a side wall of the box body (18). The other end of the water outlet pipe (11) is connected to one end of a water outlet hose (13). The water outlet hose (13) is coiled on the side wall of the box body (18). A valve (9) is provided on the water outlet pipe (11). A support frame (4) is provided at the center position of the top of the box body (18). Two through grooves (3) are provided at intervals on the support frame (4). Overflow ports (1) passing through the cavity (2) are provided on opposite sides of the top of the box body (18).
2. The device for bridge preloading according to claim 1 is characterized in that: A water inlet pipe head (7) is provided at the other end of the water inlet hose (5), and a filter screen is provided at the pipe mouth of the water inlet pipe head (7).
3. The device for bridge preloading according to claim 1 is characterized in that: A hook A (6) is also provided at the upper end of one side wall of the box body (18), and the water inlet hose (5) is coiled on the hook A (6).
4. The device for bridge preloading according to claim 1 is characterized in that: A hook B (15) is also provided at the lower end of one side wall of the box body (18), and the water outlet hose (13) is coiled on the hook B (15).
5. The device for bridge preloading according to claim 1 is characterized in that: A transparent observation window (14) is also provided on one side wall of the box body (18) and passes through the top and bottom of the box body (18), and a scale is provided on the transparent observation window (14).
6. The device for bridge preloading according to claim 1 is characterized in that: A base (12) is provided at the bottom of the box body (18), wheels (10) are provided at the four corners of the bottom of the base (12), and a rotating shaft (16) is passed between two corresponding wheels (10).
7. The device for bridge preloading according to claim 6 is characterized in that: A wheel seat (17) is provided between each wheel (10) and the base (12).
8. The device for bridge preloading according to claim 1 is characterized in that: Hooks (19) are provided at the four corners of the top of the box body (18).