A device for simulating the impact of a mudflow on a bridge pier

Abstract

The utility model belongs to bridge engineering experimental equipment technical field especially relates to a mud and stone flow impact pier simulation device, it includes water tank, angle adjusting device, mud and stone flow simulation device, pier module and data acquisition system, water tank includes inclined section and horizontal section, mud and stone flow simulation device installs on the inclined section, pier module installs on the horizontal section and pier module, the utility model discloses can adjust water tank angle, mud and stone flow impact force, flow rate and flow mode simultaneously, simulate the mud and stone flow flow path under different topographic conditions, control the flow rate, grain size distribution and impact force of mud and stone flow, adapt to a variety of experimental needs, and pier module adopts modular design, has the advantage that can quickly replace different shape pier model, be convenient for the study different shape pier's anti -impact performance, be applicable to mountainous area bridge engineering design, geological disaster prevention and control research and teaching experiment, can provide scientific experimental basis for pier anti -impact performance optimization and disaster prevention and mitigation strategy.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge engineering experimental equipment, and in particular relates to a debris flow impact pier simulation device. Background Technology

[0002] Debris flows are sudden geological disasters that pose a particularly serious threat to transportation infrastructure in mountainous areas, such as bridges. Current research methods on debris flow disasters largely rely on numerical simulations or field observations. However, due to the inherent variables in debris flow simulations or the safety risks on-site, these methods suffer from uncontrollable experimental conditions or difficulties in data acquisition.

[0003] This invention designs a debris flow impact bridge pier simulation device to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A debris flow impact pier simulation device includes a water tank, an angle adjustment device, a debris flow simulation device, a pier module, and a data acquisition system;

[0006] The water tank includes an inclined section and a horizontal section;

[0007] The angle adjustment device is located below the water tank, and the top of the angle adjustment device is connected to the inclined section;

[0008] The debris flow simulation device was installed on the inclined section;

[0009] The pier modules are installed on the horizontal section;

[0010] The data acquisition system includes sensors, data acquisition cards, and control devices. The sensors are installed on the water tank and bridge pier modules.

[0011] As a preferred embodiment, the angle adjustment device includes an electric push rod, the top of which is hinged to the bottom of the inclined section.

[0012] As a preferred embodiment, the debris flow simulation device includes a mud pump, a particle delivery device, and a flow regulating valve. The particle delivery device is connected to the mud pump, the mud pump is connected to the top of the inclined section, and the flow regulating valve is installed at the connection between the mud pump and the inclined section.

[0013] As a preferred embodiment, the pellet dispensing device includes a hopper for loading particulate matter.

[0014] As a preferred option, one or more fixed seats are installed on the horizontal section, and the pier modules are installed on the fixed seats.

[0015] As a preferred option, the pier module is cylindrical in shape.

[0016] As a preferred option, the pier module is square in shape.

[0017] As a preferred embodiment, the sensors include a pressure sensor and a flow velocity sensor. The pressure sensor is installed on the surface of the pier module, and the flow velocity sensor is installed on the inclined section. Both the pressure sensor and the flow velocity sensor are electrically connected to the data acquisition card.

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] 1. This utility model can simultaneously adjust the water tank angle, debris flow impact force, flow velocity and flow pattern to simulate the debris flow path under different terrain conditions, control the flow velocity, particle size distribution and impact force of the debris flow, adapt to various experimental needs, and the pier module adopts a modular design, which has the advantage of being able to quickly replace pier models of different shapes, making it convenient to study the impact resistance performance of piers of different shapes.

[0020] 2. This utility model records experimental data in real time through sensors and control devices, improving experimental accuracy and repeatability. The water tank structure facilitates intuitive observation of the debris flow process.

[0021] 3. This utility model is applicable to the design of bridge engineering in mountainous areas, research on geological disaster prevention and control, and teaching experiments. It can provide scientific experimental basis for optimizing the impact resistance performance of bridge piers and disaster prevention and mitigation strategies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the water tank of this utility model.

[0024] Figure 3 This is a top view of the horizontal section of this utility model.

[0025] Figure 4 This is a schematic diagram of the cylindrical bridge pier of this utility model.

[0026] Figure 5 This is a schematic diagram of the square bridge pier of this utility model.

[0027] The following are the labels in the diagram: 1. Water tank; 2. Angle adjustment device; 3. Debris flow simulation device; 4. Pier module; 5. Data acquisition system; 101. Inclined section; 102. Horizontal section; 103. Fixed base; 301. Mud pump; 302. Particle delivery device; 303. Flow regulating valve; 501. Pressure sensor; 502. Flow velocity sensor; 503. Data acquisition card; 504. Control device. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following embodiments or drawings are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0029] A debris flow impact pier simulation device, such as Figures 1 to 5 As shown, it includes a water tank 1, an angle adjustment device 2, a debris flow simulation device 3, a bridge pier module 4, and a data acquisition system 5;

[0030] The water tank 1 includes an inclined section 101 and a horizontal section 102. The water tank 1 is used to simulate a hillside where a debris flow occurs. The water tank 1 is made of transparent acrylic material, which makes it easy to observe the flow process of the debris flow.

[0031] Angle adjustment device 2 is located below water tank 1, and the top of angle adjustment device 2 is connected to inclined section 101. Angle adjustment device 2 is used to adjust the angle of water tank 1.

[0032] The debris flow simulation device 3 is installed on the inclined section 101. The debris flow simulation device 3 is used to generate and control the flow characteristics of debris flow.

[0033] The pier module 4 is installed on the horizontal section 102. Different shapes of pier modules 4 can be used according to the pier shape to be simulated.

[0034] The data acquisition system 5 includes a sensor, a data acquisition card 503, and a control device 504. The sensor is installed on the water tank 1 and the bridge pier module 4. The data acquisition card 503 transmits the sensor data to the control device 504, and the control device 504 records the experimental data.

[0035] like Figure 1 As shown, the angle adjustment device 2 includes an electric push rod. The top of the electric push rod is hinged to the bottom of the tilt section 101. The electric push rod extends and retracts to adjust the tilt angle of the water tank 1. For example, the tilt angle of the water tank 1 is set to 15°. After the electric push rod is locked, it can ensure that the angle of the water tank 1 is stable.

[0036] like Figure 1 As shown, the debris flow simulation device 3 includes a mud pump 301, a particle dispensing device 302, and a flow regulating valve 303. The particle dispensing device 302 is connected to the mud pump 301, and the mud pump 301 is connected to the top of the inclined section 101. The flow regulating valve 303 is installed at the connection between the mud pump 301 and the inclined section 101. The mud pump 301 and the flow regulating valve 303 work together to control the flow velocity and impact force of the debris flow. The flow velocity of the debris flow is 0.1 to 0.5 m / s. The particle dispensing device 302 includes a hopper for loading particulate matter. The particle type and particle size distribution, such as sand or gravel, are selected according to experimental requirements.

[0037] like Figures 1 to 5As shown, one or more fixed seats 103 are installed on the horizontal section 102, and the pier module 4 is installed on the fixed seat 103. When there is more than one fixed seat 103, the pier module 4 can be installed on different fixed seats 103 to set the distance between the pier module 4 and the bottom of the inclined section 101, simulating the distance between the pier and the hillside. The pier module 4 is installed on the fixed seat 103 by bolts and other fasteners to ensure the stability of the pier module 4 during the experiment.

[0038] The pier module 4 is cylindrical or square in shape. By replacing the pier module 4 with different shapes, the response of different pier shapes to the impact force of debris flow can be studied.

[0039] The sensors include a pressure sensor 501 and a flow velocity sensor 502. The pressure sensor 501 is installed on the surface of the pier module 4, and the flow velocity sensor 502 is installed on the inclined section 101. Both the pressure sensor 501 and the flow velocity sensor 502 are electrically connected to the data acquisition card 503, and the data acquisition card 503 is electrically connected to the control device 504.

[0040] Pressure sensor 501 and flow velocity sensor 502 are used to monitor parameters such as impact force and flow velocity of simulated debris flow in real time. Multiple pressure sensors 501 installed on the pier module 4 can monitor the impact force at different locations, while flow velocity sensors 502 installed on the inclined section 101 can monitor the flow velocity of the debris flow. Data acquisition card 503 converts the signals from pressure sensor 501 and flow velocity sensor 502 into digital signals, and then connects them to control device 504 via USB interface for real-time data transmission.

[0041] The control device 504 is a computer. The control device 504 records and analyzes experimental data in real time through supporting software. In addition, the control device 504 is also used to control the electric push rod, hopper, and flow regulating valve 303. The electric push rod controls the target tilt angle of the water tank 1, the hopper controls the amount and time of particle feeding, and the flow regulating valve 303 controls the flow rate and impact force of the debris flow to ensure that the flow rate is stable at the set value.

[0042] Experimental procedure:

[0043] 1. Device Setup:

[0044] Install water tank 1 and adjust it to the initial angle of 0°.

[0045] Connect the mud pump 301, the particle feeding device 302, and the flow regulating valve 303.

[0046] Install fixed bridge pier module 4.

[0047] Connect pressure sensor 501, flow rate sensor 502, data acquisition card 503 and control device 504.

[0048] 2. Parameter settings:

[0049] The target angle of the water tank 1 is set to 15° by the control device 504.

[0050] The speed of the mud pump 301, the amount of feed from the particle feeding device 302, and the opening degree of the flow regulating valve 303 are set.

[0051] Experimental parameters such as sampling frequency and recording time are set on the control device 504.

[0052] 3. Experiment Start-up:

[0053] Start mud pump 301 to generate debris flow.

[0054] Start the particle dispensing device 302 to dispense debris flow particles.

[0055] Real-time monitoring of parameters such as impact force and flow velocity, and recording of experimental data.

[0056] 4. Data Processing:

[0057] After the experiment, the data was exported to control device 504.

[0058] Analyze the data to generate charts such as impact force-time curves and flow velocity-time curves.

[0059] By comparing experimental results under different conditions such as the shape of pier module 4 and the angle of water tank 1, the impact resistance performance of the pier is evaluated.

[0060] Through the above-described embodiments, this invention can accurately simulate the impact of debris flows on bridge piers, providing reliable experimental data for bridge design and disaster prevention and mitigation.

[0061] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A debris flow impact pier simulation device, characterized in that: It includes a water tank (1), an angle adjustment device (2), a debris flow simulation device (3), a bridge pier module (4), and a data acquisition system (5); The water tank (1) includes an inclined section (101) and a horizontal section (102); The angle adjustment device (2) is located below the water tank (1), and the top of the angle adjustment device (2) is connected to the inclined section (101); The debris flow simulation device (3) is installed on the inclined section (101); The pier module (4) is installed on the horizontal section (102); The data acquisition system (5) includes a sensor, a data acquisition card (503) and a control device (504), with the sensor installed on the water tank (1) and the pier module (4).

2. The debris flow impact pier simulation device according to claim 1, characterized in that: The angle adjustment device (2) includes an electric push rod, the top of which is hinged to the bottom of the inclined section (101).

3. The debris flow impact pier simulation device according to claim 1, characterized in that: The debris flow simulation device (3) includes a mud pump (301), a particle dispensing device (302), and a flow regulating valve (303). The particle dispensing device (302) is connected to the mud pump (301), the mud pump (301) is connected to the top of the inclined section (101), and the flow regulating valve (303) is installed at the connection between the mud pump (301) and the inclined section (101).

4. The debris flow impact pier simulation device according to claim 3, characterized in that: The particle dispensing device (302) includes a hopper for loading particulate matter.

5. The debris flow impact pier simulation device according to claim 1, characterized in that: One or more fixed seats (103) are installed on the horizontal section (102), and the pier module (4) is installed on the fixed seat (103).

6. The debris flow impact pier simulation device according to claim 5, characterized in that: The pier module (4) is cylindrical in shape.

7. The debris flow impact pier simulation device according to claim 5, characterized in that: The pier module (4) is square in shape.

8. The debris flow impact pier simulation device according to claim 1, characterized in that: The sensors include a pressure sensor (501) and a flow velocity sensor (502). The pressure sensor (501) is installed on the surface of the pier module (4), and the flow velocity sensor (502) is installed on the inclined section (101). Both the pressure sensor (501) and the flow velocity sensor (502) are electrically connected to the data acquisition card (503).

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