Large-section aqueduct transverse seismic self-tuning damping system and installation method

Abstract

This invention discloses a self-tuning vibration reduction system and installation method for a large-section aqueduct under lateral earthquakes. The system includes a double-layered hollow perforated plate located within the aqueduct and a vertically sliding perforated plate placed between the double-layered hollow perforated plate. The double-layered hollow perforated plate is installed longitudinally within the aqueduct via a bottom connecting device and connected to the side of the aqueduct via a lateral stabilizing device to ensure its lateral stability. The vertically sliding perforated plate is inserted from top to bottom into the double-layered hollow steel plate. An intelligent lifting device is installed at the top of the aqueduct, and a water level monitoring device is installed on the inner side of the aqueduct wall. The intelligent lifting device is connected to the vertically sliding perforated plate and, based on the water depth measured by the water level monitoring device, adjusts the height and position of the vertically sliding perforated plate to change the water-passable position of the double-layered hollow perforated plate. This utilizes the aqueduct's own water volume for tuning and vibration reduction, thereby reducing the aqueduct's seismic response under lateral earthquakes.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance, and in particular to a transverse seismic self-tuning damping system for large-section aqueducts and its installation method. Background Technology

[0002] my country's water resources are unevenly distributed in time and space, necessitating the construction of large-scale water diversion and transportation projects for their redistribution. Aqueducts are a commonly used hydraulic structure, primarily supporting water diversion and transportation projects across rivers, roads, valleys, and other obstacles. However, my country is located between two major global seismic belts—the Circum-Pacific Seismic Belt and the Sea-Himalayan Seismic Belt—and aqueduct structures face severe earthquake threats. Improving the seismic performance of aqueduct structures through rational design is of significant positive importance for the safe operation of water diversion projects and the safety of drinking water for people's production and daily life. However, large-section aqueducts carry large volumes of water, and the water within the aqueduct may vibrate significantly during earthquakes. This vibration could amplify the seismic response of the entire aqueduct structure, threatening its safety. Furthermore, the water level in the aqueduct varies with seasonal factors, significantly altering the water vibration patterns. Therefore, the efficiency of passive damping designs using seismic isolation bearings and dampers may be significantly reduced. Summary of the Invention

[0003] The purpose of this invention is to provide a self-tuned damping system for lateral seismic events in large-section aqueducts and its installation method. An orifice plate is added along the water flow direction within the aqueduct. Under lateral seismic action, water flows through the holes in the orifice plate, forming a tuned liquid damper (TLD), which dissipates a portion of the seismic energy. Simultaneously, the self-tuned damping system can adjust the position of the holes in the orifice plate according to the water level and flow field characteristics under lateral seismic action within the aqueduct, achieving broad-spectrum tuned damping at different water heights. The system is simple, reliable, low-cost, and easy to replace.

[0004] This invention provides the following technical solution:

[0005] A large-section aqueduct lateral seismic self-tuning damping system includes a double-layer hollow perforated plate located within the aqueduct and a vertical sliding perforated plate placed between the double-layer hollow perforated plates. The double-layer hollow perforated plate is installed longitudinally within the aqueduct via a bottom connecting device and connected to the sides of the aqueduct via a lateral stabilizing device to ensure its lateral stability. The vertical sliding perforated plate is inserted from top to bottom into the double-layer hollow steel plate. An intelligent lifting device is installed at the top of the aqueduct, and a water level monitoring device is installed on the inner side of the aqueduct wall. The intelligent lifting device is connected to the vertical sliding perforated plate and, based on the water depth measured by the water level monitoring device, adjusts the height and position of the vertical sliding perforated plate accordingly, changing the water-passable position of the double-layer hollow perforated plate. This utilizes the aqueduct's own water volume for tuning and damping, reducing the aqueduct's seismic response under lateral earthquakes.

[0006] Preferably, holes need to be made at different locations in the double-layer hollow perforated plate;

[0007] Preferably, the vertically sliding perforated plate can slide vertically along the height of the double-layer hollow perforated plate, and the flow rate can be adjusted by the relative positional relationship between the holes on the vertically sliding perforated plate and the double-layer hollow perforated plate.

[0008] Preferably, the water level monitoring device can automatically monitor the water level in the ferry and feed the water level information back to the intelligent lifting device.

[0009] Preferably, the intelligent lifting device can adjust the position of the vertical sliding perforated plate according to the water level signal transmitted by the water level monitoring device, thereby achieving the purpose of controlling the water flow.

[0010] Preferably, the aqueduct type is selected from any one of the following: U-shaped prestressed concrete aqueduct, C-shaped prestressed concrete aqueduct, C-shaped steel aqueduct, etc., with a large cross-section opening.

[0011] The present invention also provides an installation method for the large-section aqueduct transverse seismic self-tuning damping system, which includes the following steps:

[0012] S1: The bottom connecting device is pre-embedded into the bottom surface of the large-section aqueduct;

[0013] S2: Fix the double-layer hollow perforated plate to the bottom connecting device;

[0014] S3: Insert the vertical sliding perforated plate into the double-layer hollow perforated plate, and connect the top of the vertical sliding perforated plate to the intelligent lifting device;

[0015] S4: Install the intelligent lifting device at the top of the aqueduct and connect the device controller and the liquid level detection device.

[0016] S5: The water level monitoring device is installed on the inner wall of the aqueduct to monitor the water level in real time and transmit the water level information to the intelligent lifting device.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Automatic tuning: By using the liquid level sensing device installed on the inner side of the tank wall, the height of the vertical sliding perforated plate can be automatically adjusted to control the flow of water, thereby achieving the purpose of adjusting the natural frequency of the structure.

[0019] 2. Simple and reliable, this system uses water for shock absorption, has a good shock absorption effect, and has a simple structure that is easy to install.

[0020] 3. Low price and easy replacement: The system has low technical cost and low manufacturing cost, and is easy to replace if damaged. Attached Figure Description

[0021] Figure 1a This is a schematic diagram of the structure at high water level according to an embodiment of the present invention.

[0022] Figure 1b This is a schematic diagram of the structure at low water levels according to an embodiment of the present invention.

[0023] Figure 2a A schematic diagram of a double-layer hollow perforated plate, a vertical sliding perforated plate, and an intelligent lifting device at high water levels, provided as an embodiment of the present invention.

[0024] Figure 2b A schematic diagram of a double-layer hollow perforated plate, a vertical sliding perforated plate, and an intelligent lifting device at low water levels, provided by an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of a vertical sliding perforated plate according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of a double-layer hollow perforated plate according to an embodiment of the present invention.

[0027] Figure 5a This is a horizontal schematic diagram of an embodiment of the present invention at high water levels.

[0028] Figure 5b This is a horizontal schematic diagram of an embodiment of the present invention at low water levels.

[0029] The numbers in the attached diagram are:

[0030] 1. Aqueduct; 2. Double-layer hollow perforated plate; 3. Vertical sliding perforated plate; 4. Bottom connecting device; 5. Lateral stabilizing device; 6. Intelligent lifting device; 7. Water level monitoring device. Detailed Implementation

[0031] The present invention will now be described in detail with reference to embodiments and accompanying drawings. However, it should be understood that the embodiments and drawings are for illustrative purposes only and do not constitute any limitation on the scope of protection of the present invention. All reasonable modifications and combinations included within the inventive spirit of the present invention fall within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figures 1a to 5b As shown, in this embodiment, the aqueduct type is selected as a U-shaped prestressed concrete aqueduct. A double-layer hollow perforated plate 2 is added in the aqueduct along the water flow direction. The double-layer hollow perforated plate 2 is installed in the aqueduct 1 in the forward direction through the bottom connecting device 4, and is connected to the side of the aqueduct 1 through the lateral stabilizing device 5 to ensure its lateral stability. The vertical sliding perforated plate 3 is placed in the double-layer hollow perforated plate 2. The intelligent lifting device 6 is connected to the vertical sliding perforated plate 3. The intelligent lifting device 6 adjusts the height position of the vertical sliding perforated plate 3 according to the water depth in the channel measured by the water level monitoring device 7. Both the intelligent lifting device 6 and the water level monitoring device 7 adopt existing technology. The position, number and size of the holes in the double-layer hollow perforated plate 2 and the vertical sliding perforated plate 3 can be arbitrarily designed as needed to adjust the water flow.

[0034] The present invention also provides an installation method for the large-section aqueduct transverse seismic self-tuning damping system, which includes the following steps:

[0035] S1: The bottom connecting device 4 is pre-embedded to the bottom surface of the large cross-section aqueduct 1;

[0036] S2: Fix the double-layer hollow perforated plate 2 to the bottom connecting device 4;

[0037] S3: Insert the vertical sliding perforated plate 3 into the double-layer hollow perforated plate, and connect the top of the vertical sliding perforated plate 3 to the intelligent lifting device 6;

[0038] S4: Install the intelligent lifting device 6 at the top of the aqueduct 1 and connect it to the device controller and the water level detection device 7.

[0039] S5: The water level monitoring device 7 is installed on the inner wall of the aqueduct 1 to monitor the water level of the aqueduct in real time and transmit the water level of the aqueduct to the intelligent lifting device.

[0040] The above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A transverse seismic self-tuning damping system for large-section aqueducts, characterized in that, It includes a double-layer hollow perforated plate (2) located in the aqueduct (1) and a vertical sliding perforated plate (3) placed in the interlayer of the double-layer hollow perforated plate (2). The vertical sliding perforated plate (3) is inserted into the double-layer hollow perforated plate (2) from top to bottom. The double-layer hollow perforated plate (2) is installed in the aqueduct (1) in the forward direction through the bottom connecting device (4) and is connected to the side of the aqueduct (1) through the lateral stabilizing device (5) to ensure its lateral stability. A smart lifting device (6) is installed on the top of the aqueduct (1), and a water level monitoring device (7) is installed on the inner side of the aqueduct wall (1). The smart lifting device (6) is connected to the vertical sliding perforated plate (3). According to the water depth in the channel measured by the water level monitoring device (7), the height position of the vertical sliding perforated plate (3) is adjusted according to the water depth, and the water passage position of the double-layer hollow perforated plate (2) is changed. The water volume of the aqueduct (1) itself is used to adjust and reduce the seismic response of the aqueduct under lateral earthquake. The double-layer hollow perforated plate (2) has holes at different positions; The vertical sliding perforated plate (3) slides vertically along the height in the double-layer hollow perforated plate (2). The flow rate is adjusted by the relative positional relationship between the holes on the vertical sliding perforated plate (3) and the double-layer hollow perforated plate (2). The type of aqueduct (1) is selected from any one of the following: U-shaped prestressed concrete aqueduct, C-shaped prestressed concrete aqueduct, C-shaped steel aqueduct with large cross-section opening.

2. The installation method of the large-section aqueduct transverse seismic self-tuning damping system according to claim 1, characterized in that, Includes the following steps: S1: The bottom connecting device (4) is pre-embedded into the bottom surface of the large-section aqueduct (1); S2: Fix the double-layer hollow perforated plate (2) to the bottom connecting device (4); S3: Insert the vertical sliding perforated plate (3) into the double-layer hollow perforated plate (2), and connect the top of the vertical sliding perforated plate (3) to the intelligent lifting device (6); S4: Install the intelligent lifting device (6) at the top of the aqueduct (1) and connect the device controller and the water level monitoring device (7). S5: The water level monitoring device (7) is installed on the inner wall of the aqueduct to monitor the water level of the aqueduct in real time and transmit the water level of the aqueduct to the intelligent lifting device (6).

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