Seasonal water level coping construction technology and device in river-crossing bridge lower foundation construction

Abstract

The invention relates to the technical field of bridge construction, and discloses a seasonal water level coping device in river-crossing bridge lower foundation construction, which comprises a pier and an overwater bearing platform on one side of the pier, the side of the overwater bearing platform close to the pier is fixedly connected to the pier, and the side of the overwater bearing platform away from the pier is provided with a river pier platform. The overwater bearing platform is located in the center of the river abutment and fixedly connected with the river abutment, a water seepage grid is arranged on the side, close to the river abutment, of the overwater bearing platform, and a buffering supporting plate is arranged on the side, perpendicular to the river abutment, of the overwater bearing platform. In order to prevent the bridge pier structure from being not completely solidified and limited and reduce water flow impact on the two sides, buffer structures can be built on the two sides of the bottom of the pier abutment, and the buffer supporting plate shakes back and forth through the buffer assembly on one side along with seasonal tide water flow velocity change in a river, so that impact on the bottom of the bridge pier is reduced; and therefore, the overall buffering prevention effect of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a construction process and device for coping with seasonal water levels in the construction of the lower foundation of a river-spanning bridge. Background Art

[0002] The substructure construction of river-crossing bridges is a key link in bridge construction, and its construction quality directly affects the overall stability and safety of the bridge. Through drilling, geophysical exploration and other means, the riverbed geological structure, water level changes, flow velocity and other parameters are clarified to provide a basis for foundation design. According to the geological conditions and bridge load, the foundation type is selected, and a construction plan (such as cofferdam method and pile-driving technology) is formulated. Construction access roads and temporary docks are built, hydropower lines are erected, and cofferdam materials and mechanical equipment (such as drilling rigs and cranes) are prepared. During the bridge construction process, water level changes (such as floods, tides, and seasonal fluctuations) may have a significant impact on foundation construction, structural safety and construction progress. For example, the construction access road is set up with a water-crossing pavement combined with the green construction concept, and environmental protection is taken into account in flood prevention and rescue, ensuring the dual goals of project safety and ecological compliance. It will also combine scientific and technological means to use intelligent detection and other instruments to take early precautions against seasonal water level changes.

[0003] However, the seasonal water level response devices in the construction of the lower foundation of the above-mentioned river-crossing bridges are mostly water level monitoring mechanisms. On the one hand, during the real-time construction flooding stage, the river flow rate cannot be slowed down, which can easily affect the construction of the bridge piers. On the other hand, the subsequent use environment of the lower part of the bridge cannot be guaranteed. The long-term water flow impact on the bottom surface of the bridge is prone to erosion. For this reason, we propose a seasonal water level response construction process and device for the construction of the lower foundation of the river-crossing bridge. Summary of the Invention

[0004] (1) Technical problems solved In response to the deficiencies in the existing technology, the present invention provides a construction process and device for seasonal water level response in the construction of the lower foundation of a river-crossing bridge, which solves the problem that the existing river flow velocity affects the construction of bridge piers and erodes the surface of the bridge piers in the later stage.

[0005] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a seasonal water level response device in the construction of the lower foundation of a river-crossing bridge, including a bridge pier and an above-water platform on one side of the bridge pier, the above-water platform close to the bridge pier is fixedly connected to the bridge pier, the above-water platform is installed with a river pier platform on the side away from the bridge pier, and the side of the river pier platform close to the above-water platform is fixedly connected to the above-water platform, the above-water platform is located at the center of the river pier platform and is fixedly connected to the river pier platform, the above-water platform is provided with a seepage grid on the side close to the river pier platform, and the seepage grid is placed inside one side of the above-water platform, a buffer support plate is provided on the side of the above-water platform perpendicular to the river pier platform, and the side of the buffer support plate close to the river pier platform is movably connected to the river pier platform, five groups of flow limiting plates are installed on the side of the buffer support plate close to the above-water platform, and the side of the flow limiting plate close to the above-water platform is fixedly connected to the buffer support plate, and a support rod is provided on the side of the buffer support plate perpendicular to the river pier platform.

[0006] Preferably, a U-shaped bracket is installed on the side of the support rod close to the buffer support plate, and the side of the U-shaped bracket close to the support rod is fixedly connected to the support rod, the side of the buffer support plate close to the U-shaped bracket is fixedly connected to the docking rod, the side of the docking rod away from the buffer support plate is inserted into the U-shaped bracket and is slidably connected to the U-shaped bracket, the side of the docking rod close to the support rod is fixedly connected to the buffer part, and the side of the buffer part away from the docking rod is fixedly connected to the support rod.

[0007] Preferably, a second mounting member is provided in parallel on the side of the U-shaped bracket close to the river pier, and the side of the second mounting member close to the support rod is fixedly connected to the support rod, the U-shaped bracket and the second mounting member are respectively placed at the upper and lower ends of the support rod, the side of the second mounting member close to the buffer support plate is fixedly connected to a rotating member, the side of the rotating member close to the buffer support plate is installed with a first mounting member, and the side of the first mounting member away from the flow limiting plate is fixedly connected to the rotating member, and the side of the first mounting member close to the buffer support plate is fixedly connected to the buffer support plate.

[0008] Preferably, the seepage grid is provided with a steel support frame 1 on the side close to the water pedestal, and the steel support frame 1 is placed inside the water pedestal and fixedly connected to the water pedestal, the river pier is provided with a steel support frame 2 on the side away from the water pedestal, and the steel support frame 2 is placed inside the river pier and fixedly connected to the river pier, the buffer support plate is fixedly connected with a water baffle on the side away from the docking rod, the river pier is provided with a slope 2 on the side close to the water baffle, and the water baffle is fixedly connected to the slope 2 on the side close to the river pier.

[0009] Preferably, the side of the river pier perpendicular to the water-based platform is provided with a slope used in conjunction with a seepage grid, the side of the support rod close to the river pier is fixedly connected to a ground pile, and the side of the ground pile away from the support rod is inserted and connected to the interior of the river pier, the side of the pier away from the water-based platform is fixedly connected to the abutment, the side of the abutment close to the pier is fixedly connected to the bridge pile, one end of the bridge pile is fixedly connected to the bridge abutment, and the other end of the bridge pile is fixedly connected to the pier.

[0010] Preferably, the side of the river pier away from the water pedestal is fixedly connected to the launching pedestal, the side of the launching pedestal away from the river pier is fixedly connected to the riverbed pedestal, the side of the riverbed pedestal close to the river pier is provided with a support pile, one end of the support pile is fixedly connected to one side of the river pier, and the other end of the support pile is fixedly connected to the riverbed pedestal, the side of the riverbed pedestal close to the launching pedestal is fixedly connected to a cofferdam, and the side of the launching pedestal close to the riverbed pedestal passes through the cofferdam and is fixedly connected to the riverbed pedestal.

[0011] Preferably, a construction process for coping with seasonal water levels in the construction of the lower foundation of a river-crossing bridge includes bridge piers, water pedestals, river piers, buffer support plates, and lower pedestals.

[0012] The bridge piers are used to support the upper part of the bridge during construction and use, and include bridge piles and abutments. The bridge piles are located in the middle of the two opposite sides of the piers, and are used to connect the support components on both sides and limit the position. The abutments are located at the top of the piers and the piles, and are used to connect the lower part of the bridge with the upper part of the bridge and fix it in place. The above-water pier is used to isolate the river surface from the lower part of the bridge during construction and use, and includes a seepage grid and a steel support frame. The seepage grid is located at the bottom of the above-water pier and is in the shape of a groove, and is used to reduce the impact of the river surface on the load-bearing components and slow down the flow rate. The steel support frame is located inside the above-water pier and on one side of the seepage grid, and is used to strengthen the pier and prevent the bottom groove from being eroded. The river pier is used to keep the bottom of the pier horizontal with the river surface during construction and use, and includes slope 1, slope 2, and steel support frame 2. Slope 1 and slope 2 are both located at the side of the river pier, on a gentle slope adjacent to the water, and are used for draining water from the pier and passing water from the river surface. The steel support frame 2 is located on the inner bottom side of the river pier, and is used to strengthen the pier and prevent the bottom from being eroded. The buffer support plate is used to slow down the flow rate of river water on both sides of the platform during construction and use, and mainly includes a flow limiting plate and a water barrier. The flow limiting plate is located on one side of the buffer support plate and is placed on the buffer support plate to reduce the water pressure on the buffer support plate and evacuate the impact of water flow. The water barrier is located at the bottom of the buffer support plate and the top of the second slope to isolate the water surface and slow down the water flow pressure at the bottom of the support plate. The launching pedestal is used for the compression-resistant load-bearing structure of the riverbed during construction, and mainly includes a riverbed pedestal and support piles. The riverbed pedestal is located at the bottom of the launching pedestal, and is used to connect the load-bearing structure in the river and intersect with the riverbed. The support piles are located at the four corners of the riverbed pedestal, and the top ends are fixedly connected to the river piers, and are used to assist in supporting the load-bearing and connecting and fixing the upper and lower structures in the river.

[0013] In summary, the technical effects and advantages of the present invention are as follows: 1. In the present invention, a buffer support plate 4 is provided on one side of the above-water platform 2 perpendicular to the river pier 3, wherein five sets of flow-limiting plates 401 are installed on the side of the buffer support plate 4 close to the above-water platform 2. During the foundation construction process, in order to prevent the pier 1 structure from being completely solidified and limited, and to reduce the impact of water flow on both sides, a buffer structure can be built on both sides of the pier bottom. As the flow rate of the seasonal tidal flow in the river changes, the buffer support plate 4 swings back and forth through the buffer assembly on one side, reducing the impact on the bottom of the pier 1, thereby improving the overall buffering and prevention effect of the device.

[0014] 2. In the present invention, a seepage grid 201 is provided on the side of the water platform 2 close to the river pier 3, and the seepage grid 201 is placed inside one side of the water platform 2. Due to seasonal water level changes, when the water flow brought in by the buffer support plate 4 on one side of the middle part of the device flows through the water platform 2, a part of the water flow can be discharged through the seepage grid 201 on the bottom side, reducing the impact of the water pressure in the middle of the device and effectively slowing down the water flow rate, thereby improving the overall practical use effect of the device.

[0015] 3. In the present invention, a steel support frame 1 202 is provided on the side of the seepage grid 201 close to the water base 2, and a steel support frame 2 303 is provided on the side of the river pier 3 away from the water base 2. Since the bottom of the water base 2 is in the shape of a grid groove, the surface of the structure is easily corroded and worn under the impact of long-term water level changes. By reinforcing and installing a steel grid assembly on one side of the grid structure, it can provide a certain supporting effect while also effectively preventing the erosion of the concrete surface, thereby improving the overall practical effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a seasonal water level response device for the construction of the lower foundation of a river-crossing bridge according to the present invention; Figure 2 This is a schematic diagram of the axial structure of the buffer support plate of the present invention; Figure 3 It is a schematic diagram of the axial structure of the water bearing platform and the river pier of the present invention; Figure 4 It is a schematic diagram of the front cross-sectional structure of the water-based platform and the river pier of the present invention; Figure 5 This is a schematic diagram of the axial structure of the support rod of the present invention; Figure 6 This is a schematic diagram of the axial structure of the steel bar support frame assembly of the present invention; Figure 7 It is a schematic diagram of the downward-axis structure of the above-water platform of the present invention.

[0017] In the figure: 1. Bridge pier; 101. Bridge pile; 102. Bridge abutment; 2. Water bearing platform; 201. Seepage grid; 202. Steel support frame 1; 3. River pier; 301. Slope 1; 302. Slope 2; 303. Steel support frame 2; 4. Buffer support plate; 401. Flow limiting plate; 402. Water-blocking plate; 403. Docking rod; 404. Mounting part 1; 5. Support rod; 501. Embedded pile; 502. U-shaped bracket; 503. Buffer part; 504. Mounting part 2; 505. Rotating part; 6. Launching platform; 601. Cofferdam; 602. Riverbed bearing platform; 603. Support pile. DETAILED DESCRIPTION

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

[0019] refer to Figure 1-Figure 7 The seasonal water level response device for the lower foundation construction of a river-crossing bridge shown in the figure includes a pier 1 and an above-water platform 2 on one side of the pier 1, the side of the above-water platform 2 close to the pier 1 is fixedly connected to the pier 1, the side of the above-water platform 2 away from the pier 1 is installed with a river pier platform 3, and the side of the river pier platform 3 close to the above-water platform 2 is fixedly connected to the above-water platform 2, the above-water platform 2 is located at the center of the river pier platform 3 and is fixedly connected to the river pier platform 3, a seepage grid 201 is provided on the side of the above-water platform 2 close to the river pier platform 3, and the seepage grid 201 is placed inside one side of the above-water platform 2, a buffer support plate 4 is provided on one side of the above-water platform 2 perpendicular to the river pier platform 3, and the side of the buffer support plate 4 close to the river pier platform 3 is movably connected to the river pier platform 3, and the buffer support plate 4 close to the above-water platform Five groups of flow limiting plates 401 are installed on one side of the platform 2, and the side of the flow limiting plate 401 away from the water support platform 2 is fixedly connected to the buffer support plate 4, and the side of the buffer support plate 4 perpendicular to the river pier 3 is provided with a support rod 5, and a U-shaped bracket 502 is installed on the side of the support rod 5 close to the buffer support plate 4, and the side of the U-shaped bracket 502 close to the support rod 5 is fixedly connected to the support rod 5, and the side of the buffer support plate 4 close to the U-shaped bracket 502 is fixedly connected to the support rod 5, and the side of the buffer support plate 4 close to the U-shaped bracket 502 is fixedly connected to the docking rod 403, and the side of the docking rod 403 away from the buffer support plate 4 is inserted into the U-shaped bracket 502 and is slidably connected to the U-shaped bracket 502, and the side of the docking rod 403 close to the support rod 5 is fixedly connected to the buffer part 503, and the side of the buffer part 503 away from the docking rod 403 is fixedly connected to the support rod 5.

[0020] Among them, the U-shaped bracket 502 is parallel to the side of the river pier 3 with a mounting part 2 504, and the side of the mounting part 2 504 close to the support rod 5 is fixedly connected to the support rod 5, the U-shaped bracket 502 and the mounting part 2 504 are respectively placed at the upper and lower ends of the support rod 5, the side of the mounting part 2 504 close to the buffer support plate 4 is fixedly connected with a rotating part 505, the side of the rotating part 505 close to the buffer support plate 4 is installed with a mounting part 1 404, and the mounting part 1 404 is away from the flow limiting part. One side of the plate 401 is fixedly connected to the rotating part 505, and the side of the mounting part 404 close to the buffer support plate 4 is fixedly connected to the buffer support plate 4. The side of the seepage grid 201 close to the water base 2 is provided with a steel support frame 202, and the steel support frame 202 is placed inside the water base 2 and fixedly connected to the water base 2. The side of the river pier 3 away from the water base 2 is provided with a steel support frame 2 303, and the steel support frame 2 303 is placed inside the river pier 3 and fixedly connected to the river pier 3.

[0021] Among them, the side of the buffer support plate 4 away from the docking rod 403 is fixedly connected to the baffle 402, the side of the river pier 3 close to the baffle 402 is provided with a slope 2 302, and the side of the baffle 402 close to the river pier 3 is fixedly connected to the slope 2 302, the side of the river pier 3 perpendicular to the water-supporting platform 2 is provided with a slope 1 301 used in conjunction with the seepage grid 201, the side of the support rod 5 close to the river pier 3 is fixedly connected to the embedded pile 501, and the side of the embedded pile 501 away from the support rod 5 is inserted into the interior of the river pier 3, the side of the pier 1 away from the water-supporting platform 2 is fixedly connected to the abutment 102, the side of the abutment 102 close to the pier 1 is fixedly connected to the bridge pile 101, and the bridge pile 1 One end of 01 is fixedly connected to the abutment 102, and the other end of the bridge pile 101 is fixedly connected to the bridge pier 1, the side of the river pier platform 3 away from the water platform 2 is fixedly connected to the launching platform 6, the side of the launching platform 6 away from the river pier platform 3 is fixedly connected to the riverbed platform 602, and the side of the riverbed platform 602 close to the river pier platform 3 is provided with a supporting pile 603, one end of the supporting pile 603 is fixedly connected to one side of the river pier platform 3, and the other end of the supporting pile 603 is fixedly connected to the riverbed platform 602, the side of the riverbed platform 602 close to the launching platform 6 is fixedly connected to the cofferdam 601, and the side of the launching platform 6 close to the riverbed platform 602 passes through the cofferdam 601 and is fixedly connected to the riverbed platform 602.

[0022] Among them, a construction process for coping with seasonal water levels in the construction of the lower foundation of a river-crossing bridge includes a bridge pier 1, an above-water pedestal 2, a river pier 3, a buffer support plate 4, and a lower water pedestal 6.

[0023] Pier 1 is used to support the upper part of the bridge during construction and use, and includes piles 101 and abutments 102. Piles 101 are located in the middle of the two opposite sides of the piers 1, and are used to connect the supporting components on both sides and limit the position. Abutments 102 are located at the top of the piers 1 and piles 101, and are used to connect the lower part of the bridge with the upper part of the bridge and are fixed in use. The water-supported platform 2 is used to isolate the river surface from the lower part of the bridge during construction and use. It includes a seepage grid 201 and a steel support frame 202. The seepage grid 201 is located at the bottom of the water-supported platform 2 and is in the shape of a groove. It is used to reduce the impact of the river surface on the load-bearing components and slow down the flow rate. The steel support frame 202 is located inside the water-supported platform 2 and on one side of the seepage grid 201. It is used to strengthen the platform and prevent the bottom groove from being eroded. River pier platform 3 is used to keep the bottom of the pier platform level with the river surface during construction and use. It includes slope 1 301, slope 2 302, and steel support frame 2 303. Slope 1 301 and slope 2 302 are both located on the side of river pier platform 3, on the gentle slope adjacent to the water, and are used for draining water from the platform and passing water from the river surface. Steel support frame 2 303 is located on the inner bottom side of river pier platform 3, and is used to strengthen the platform and prevent the bottom from being eroded. The buffer support plate 4 is used to slow down the flow rate of river water on both sides of the platform during construction. It mainly includes a flow limiting plate 401 and a water barrier 402. The flow limiting plate 401 is located on one side of the buffer support plate 4 and is placed on the buffer support plate 4 to reduce the water pressure on the buffer support plate 4 and evacuate the impact of water flow. The water barrier 402 is located at the bottom of the buffer support plate 4 and the top of the slope 2 302 to isolate the water surface and slow down the water flow pressure at the bottom of the support plate; The launching pedestal 6 is used for the compression-resistant load-bearing structure of the riverbed during construction and use, and mainly includes a riverbed pedestal 602 and support piles 603. The riverbed pedestal 602 is located at the bottom of the launching pedestal 6, and is used to connect the load-bearing structure in the river and intersect with the riverbed. The support piles 603 are located at the four corners of the riverbed pedestal 602, and the top is fixedly connected to the river pier 3, and is used to assist in supporting the load-bearing and connecting and fixing the upper and lower structures in the river.

[0024] Working principle of the present invention: First, the launch platform 6 structure is built on the riverbed foundation piles, and the riverbed platform 602 is fixedly connected to the side of the launch platform 6 away from the river pier platform 3. A support pile 603 is provided on the side of the riverbed platform 602 close to the river pier platform 3. One end of the support pile 603 is fixedly connected to one side of the river pier platform 3, and the other end of the support pile 603 is fixedly connected to the riverbed platform 602. The side of the riverbed platform 602 close to the launch platform 6 is fixedly connected to the cofferdam 601, and the side of the launch platform 6 close to the riverbed platform 602 passes through the cofferdam 601 and is fixedly connected to the riverbed platform 602. The river pier platform 3 is installed on the top of the launch platform 6, and the side of the river pier platform 3 away from the water platform 2 is provided with a steel support frame 2 303, and the steel support frame The second 303 is placed inside the river pier platform 3 and is fixedly connected to the river pier platform 3. The water-based platform 2 is fixedly connected to the top of the river pier platform 3. A seepage grid 201 is provided on the side of the water-based platform 2 close to the river pier platform 3, and the seepage grid 201 is placed inside one side of the water-based platform 2. Due to seasonal water level changes, when the water flow brought in by the buffer support plate 4 on one side of the middle of the device flows through the water-based platform 2, a part of the water flow can be drained through the seepage grid 201 on the bottom side, reducing the impact of the water pressure in the middle of the device, and can also effectively slow down the water flow rate, thereby improving the actual use effect of the entire device. A buffer support plate 4 is provided on one side of the water-based platform 2 perpendicular to the river pier platform 3, and the side of the buffer support plate 4 close to the river pier platform 3 is movably connected to the river pier platform 3; Secondly, five sets of flow limiting plates 401 are installed on the side of the buffer support plate 4 close to the water platform 2, and the side of the flow limiting plate 401 away from the water platform 2 is fixedly connected to the buffer support plate 4, and a support rod 5 is provided on the side of the buffer support plate 4 perpendicular to the river pier 3. A U-shaped bracket 502 is installed on the side of the support rod 5 close to the buffer support plate 4, and the side of the U-shaped bracket 502 close to the support rod 5 is fixedly connected to the support rod 5. A docking rod 403 is fixedly connected to the side of the buffer support plate 4 close to the U-shaped bracket 502, and the docking rod 403 is inserted into the U-shaped bracket 5 on the side away from the buffer support plate 4. 02 and is slidably connected to the U-shaped bracket 502. A buffer member 503 is fixedly connected to the side of the docking rod 403 close to the support rod 5, and the side of the buffer member 503 away from the docking rod 403 is fixedly connected to the support rod 5. During the foundation construction process, in order to prevent the pier 1 structure from being completely solidified and limited, and to reduce the impact of water flow on both sides, a buffer structure can be built on both sides of the bottom of the pier. As the flow rate of the seasonal tidal flow in the river changes, the buffer support plate 4 swings back and forth through the buffer component on one side, reducing the impact on the bottom of the pier 1, thereby improving the overall buffering prevention effect of the device; Then, a steel support frame 202 is provided on the side of the seepage grid 201 close to the water platform 2, and a steel support frame 303 is provided on the side of the river pier 3 away from the water platform 2. Since the bottom of the water platform 2 is in the shape of a grid groove, the surface of the structure is easily corroded and worn under the impact of long-term water level changes. By reinforcing and installing a steel grid assembly on one side of the grid structure, it can play a certain supporting effect while also effectively preventing the erosion of the concrete surface. The top of the water platform 2 is fixedly connected to the bridge pier 1.

[0025] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device that performs control such as a computer.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A seasonal water level response device for the construction of the lower foundation of a river-crossing bridge, comprising a bridge pier (1) and an above-water platform (2) on one side of the bridge pier (1), characterized in that: The side of the above-water platform (2) close to the bridge pier (1) is fixedly connected to the bridge pier (1), the side of the above-water platform (2) away from the bridge pier (1) is installed with a river pier platform (3), and the side of the river pier platform (3) close to the above-water platform (2) is fixedly connected to the above-water platform (2), the above-water platform (2) is located at the center of the river pier platform (3) and is fixedly connected to the river pier platform (3), the side of the above-water platform (2) close to the river pier platform (3) is provided with a seepage grid (201), and the seepage grid (201) is placed on the above-water platform Inside one side of the pedestal (2), a buffer support plate (4) is provided on a side of the above-water pedestal (2) perpendicular to the river pier (3), and a side of the buffer support plate (4) close to the river pier (3) is movably connected to the river pier (3), and five groups of flow limiting plates (401) are installed on a side of the buffer support plate (4) close to the above-water pedestal (2), and a side of the flow limiting plates (401) away from the above-water pedestal (2) is fixedly connected to the buffer support plate (4), and a support rod (5) is provided on a side of the buffer support plate (4) perpendicular to the river pier (3).

2. The seasonal water level response device during the construction of the lower foundation of a river-crossing bridge according to claim 1 is characterized by: A U-shaped bracket (502) is installed on the side of the support rod (5) close to the buffer support plate (4), and the side of the U-shaped bracket (502) close to the support rod (5) is fixedly connected to the support rod (5); a docking rod (403) is fixedly connected to the side of the buffer support plate (4) close to the U-shaped bracket (502); a side of the docking rod (403) away from the buffer support plate (4) is inserted into the U-shaped bracket (502) and is slidably connected to the U-shaped bracket (502); a buffer member (503) is fixedly connected to the side of the docking rod (403) close to the support rod (5), and a side of the buffer member (503) away from the docking rod (403) is fixedly connected to the support rod (5).

3. The seasonal water level response device during the construction of the lower foundation of a river-crossing bridge according to claim 2 is characterized by: The U-shaped bracket (502) is provided with a second mounting member (504) in parallel on a side close to the river pier (3), and the second mounting member (504) is fixedly connected to the support rod (5) on a side close to the support rod (5). The U-shaped bracket (502) and the second mounting member (504) are respectively placed at the upper and lower ends of the support rod (5). The second mounting member (504) is fixedly connected to a rotating member (505) on a side close to the buffer support plate (4). The first mounting member (404) is provided with a side close to the buffer support plate (4). The side of the first mounting member (404) away from the flow limiting plate (401) is fixedly connected to the rotating member (505). The side of the first mounting member (404) close to the buffer support plate (4) is fixedly connected to the buffer support plate (4).

4. The seasonal water level response device during the construction of the lower foundation of a river-crossing bridge according to claim 1 is characterized by: The seepage grid (201) is provided with a first steel support frame (202) on a side close to the water bearing platform (2), and the first steel support frame (202) is placed inside the water bearing platform (2) and fixedly connected to the water bearing platform (2). The river pier (3) is provided with a second steel support frame (303) on a side away from the water bearing platform (2), and the second steel support frame (303) is placed inside the river pier (3) and fixedly connected to the river pier (3).

5. The seasonal water level response device during the construction of the lower foundation of a river-crossing bridge according to claim 1 is characterized by: The side of the buffer support plate (4) away from the docking rod (403) is fixedly connected to a water barrier plate (402), and the side of the river pier (3) close to the water barrier plate (402) is provided with a second slope (302), and the side of the water barrier plate (402) close to the river pier (3) is fixedly connected to the second slope (302).

6. The seasonal water level response device during construction of the lower foundation of a river-crossing bridge according to claim 1, characterized in that: A slope (301) used in conjunction with a seepage grid (201) is provided on one side of the river pier (3) perpendicular to the water bearing platform (2); a ground-embedded pile (501) is fixedly connected to the side of the support rod (5) close to the river pier (3); and the ground-embedded pile (501) is inserted and connected to the interior of the river pier (3) on the side away from the support rod (5).

7. The seasonal water level response device during construction of the lower foundation of a river-crossing bridge according to claim 1, characterized in that: The side of the bridge pier (1) away from the water-supported platform (2) is fixedly connected to a bridge abutment (102), and the side of the bridge abutment (102) close to the bridge pier (1) is fixedly connected to a bridge pile (101), one end of the bridge pile (101) is fixedly connected to the bridge abutment (102), and the other end of the bridge pile (101) is fixedly connected to the bridge pier (1).

8. The seasonal water level response device during construction of the lower foundation of a river-crossing bridge according to claim 1, characterized in that: The side of the river pier (3) away from the water bearing platform (2) is fixedly connected to the water bearing platform (6), the side of the water bearing platform (6) away from the river pier (3) is fixedly connected to the riverbed bearing platform (602), and the side of the riverbed bearing platform (602) close to the river pier (3) is provided with a support pile (603).

9. The seasonal water level response device during construction of the lower foundation of a river-crossing bridge according to claim 8, characterized in that: One end of the support pile (603) is fixedly connected to one side of the river pier (3), and the other end of the support pile (603) is fixedly connected to the riverbed support (602). The side of the riverbed support (602) close to the launch support (6) is fixedly connected to the cofferdam (601), and the side of the launch support (6) close to the riverbed support (602) passes through the cofferdam (601) and is fixedly connected to the riverbed support (602).

10. A construction process for seasonal water level response in the construction of the lower foundation of a river-crossing bridge, characterized in that: It includes a bridge pier (1), an above-water pedestal (2), a river pier (3), a buffer support plate (4), and a lower water pedestal (6); The bridge pier (1) is used to support the upper part of the bridge during construction and use, and includes a bridge pile (101) and an abutment (102). The bridge pile (101) is located in the middle position of the opposite side of the two groups of bridge piers (1) and is used to connect the supporting components on both sides and limit the position. The abutment (102) is located at the top position of the bridge pier (1) and the bridge pile (101) and is used to connect the lower part of the bridge and the upper part of the bridge and is fixed in use. The above-water bearing platform (2) is used to isolate the river surface from the lower part of the bridge during construction and use, and comprises a seepage grid (201) and a steel support frame (202). The seepage grid (201) is located at the bottom of the above-water bearing platform (2) and is in the shape of a groove, and is used to reduce the impact of the river surface on the load-bearing components and slow down the flow rate. The steel support frame (202) is located inside the above-water bearing platform (2) and on one side of the seepage grid (201), and is used to strengthen the bearing platform and prevent the bottom groove from being eroded; The river pier (3) is used to keep the bottom of the pier horizontal with the river surface during construction and use, and includes slope one (301), slope two (302), and steel support frame two (303). Slope one (301) and slope two (302) are both located at the side of the river pier (3) and the gentle slope adjacent to the water, and are used for drainage of the pier and water passing through the river surface. The steel support frame two (303) is located at the inner bottom side of the river pier (3) and is used to strengthen the pier and prevent the bottom from being eroded; The buffer support plate (4) is used to slow down the flow rate of river water on both sides of the platform during construction and use, and mainly includes a flow limiting plate (401) and a water barrier (402). The flow limiting plate (401) is located on one side of the buffer support plate (4) and is placed on the buffer support plate (4) to reduce the water pressure of the buffer support plate (4) and evacuate the impact of water flow. The water barrier (402) is located at the bottom of the buffer support plate (4) and the top of the second slope (302) to isolate the water surface and slow down the water flow pressure at the bottom of the support plate. The launching platform (6) is used for the compression-resistant load-bearing structure of the riverbed during construction and use, and mainly includes a riverbed platform (602) and support piles (603). The riverbed platform (602) is located at the bottom of the launching platform (6) and is used to connect the load-bearing structure in the river and intersect with the riverbed. The support piles (603) are located at the four corners of the riverbed platform (602) and the top ends are fixedly connected to the river pier (3) to assist in supporting the load-bearing and connecting and fixing the upper and lower structures in the river.

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