Device and method for measuring local scour of water-blocking building under torrent condition

Abstract

The invention discloses a device and method for measuring local scour of a water-blocking building under a torrent condition, and the device comprises a fixed assembly, a telescopic support, a measuring probe, a sensor, a data collector and a remote monitoring center, and the fixed assembly is fixed at the pier top or pier body of a pier; the top ends of the telescopic supports are fixedly connected to the bottom end of the fixing assembly. The multiple measuring probes are in one-to-one correspondence with the multiple telescopic supports, and the top ends of the measuring probes are fixedly connected with the bottom ends of the telescopic supports. A sensor is fixed at the bottom end of the measuring probe; the processor is used for receiving and processing data acquired by the sensor; and the data collector is connected with the remote monitoring center through a wireless network. Under the conditions of torrent flow and high sand content, high-frequency and high-precision measurement of the depth of the scour pit can be realized, the limitation of a traditional optical and ultrasonic method is overcome, and reliable data support is provided for bridge safety assessment and scour mechanism research.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a local scour measuring device for a water-blocking building under rapid flow conditions and a measuring method thereof. Background Art

[0002] Bridge engineering is an important part of modern engineering infrastructure construction, especially the construction of river and sea bridges, which is of great significance to national economic development and regional connectivity; however, with the continuous expansion of the scale and increasing complexity of bridge engineering, the safety of bridges has become increasingly prominent. Among them, the local scouring problem around the piers poses a serious threat to the safety of bridges.

[0003] Local scour refers to the phenomenon that water scours the riverbed around bridge piers, which may expose the bridge pier foundation and even cause the bridge to tilt or collapse in severe cases. Even if the scour depth does not exceed the foundation burial depth, the change in scour depth and the shape of the scour pit will significantly affect the structural dynamic characteristics of the bridge. Local scour of bridges is mainly caused by the interaction between water flow and sediment around piles, especially around pile group foundations, where the scour mechanism is particularly complex. Therefore, accurate monitoring and prediction of the development of local scour is crucial to ensure bridge safety.

[0004] In the prior art, the research on scouring problems under slow flow conditions (flow intensity is usually less than 1) is relatively mature. However, under rapid flow conditions, due to the high water velocity, not only the scouring effect of the water flow on the riverbed is aggravated, but also the movement of silt and other sediments is significantly increased. This high-speed water flow can carry more silt particles, resulting in a sharp increase in the amount of suspended sediments, which in turn makes the water body extremely turbid or even opaque. In this case, traditional optical methods and ultrasonic equipment are often unable to effectively measure the depth of scouring pits, which seriously restricts the understanding and prediction of the scouring process under rapid flow conditions. The time-varying process of scouring pits formed in the riverbed is a topic that needs to be discussed in various scouring studies; under rapid flow conditions, due to the high water velocity, the movement of sand and other sediments increases significantly, and the amount of suspended sediments in the water also increases, causing the water body to become opaque, which makes traditional optical methods and ultrasonic equipment unable to be effectively used to measure the depth of scouring pits during sediment scouring.

[0005] Therefore, there is an urgent need for an efficient and accurate measuring device and a measuring method under rapid flow conditions to ensure the safety and stability of the bridge structure. Summary of the invention

[0006] The purpose of the present invention is to provide a local scour measurement device for water-blocking buildings under rapid flow conditions and a measurement method thereof, which can achieve high-frequency and high-precision measurement of scour pit depth under rapid flow and high sand content conditions, overcome the limitations of traditional optical and ultrasonic methods, and provide reliable data support for bridge safety assessment and scour mechanism research.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A local scour measurement device for water-blocking buildings under rapid flow conditions, comprising:

[0009] A fixing assembly, wherein the fixing assembly is fixed to the pier top or pier body of the bridge pier;

[0010] A telescopic bracket, wherein the top ends of the plurality of telescopic brackets are fixedly connected to the bottom ends of the fixed components;

[0011] Measuring probes, wherein a plurality of the measuring probes correspond to a plurality of the telescopic brackets one by one, and a top end of the measuring probe is fixedly connected to a bottom end of the telescopic bracket;

[0012] A sensor, wherein the sensor is fixed at the bottom end of the measuring probe;

[0013] A data collector, used for receiving and processing the data collected by the sensor, the sensor is connected to the data collector via a signal transmission line, and the data collector is fixed on the fixing device;

[0014] A remote monitoring center, wherein the data collector is connected to the remote monitoring center via a wireless network.

[0015] Furthermore, the fixing assembly includes an upper fixing ring and a lower fixing ring, the upper fixing ring and the lower fixing ring are fixedly connected by a plurality of connecting rods, and the plurality of connecting rods correspond one-to-one to the plurality of telescopic brackets, the bottom end of the connecting rod passes through the lower fixing ring and is fixedly connected to the top of the telescopic bracket, and the data collector is fixed to the top of the lower fixing ring.

[0016] Furthermore, the upper fixing ring and the lower fixing ring are each composed of two semicircular rings, and the two semicircular rings are fixed to the pier top or pier body of the pier by bolts and nuts, and the upper fixing ring and the lower fixing ring are locked to the pier top or pier body of the pier.

[0017] Furthermore, the telescopic bracket includes an inner rod, an outer rod, a threaded rod and a motor, the inner rod and the outer rod are both hollow, the motor is fixed to the top end of the inner rod, the output end of the motor is fixedly connected to the top end of the threaded rod, an outer wall of the threaded rod is provided with an external thread, and an inner wall of the outer rod is provided with an internal thread matching the external thread, the top end of the inner rod is fixedly connected to the bottom end of the connecting rod, the bottom end of the outer rod is fixedly connected to the top end of the measuring probe, and the outer rod slides up and down axially outside the inner rod.

[0018] Furthermore, the measuring probe is made of stainless steel, has a diameter of 5-10 mm, and a length of 0.5-2 m.

[0019] Furthermore, the adjustment range of the telescopic bracket is 0.5-20m.

[0020] A method for measuring the local scour of a water-blocking building under rapid flow conditions is also disclosed, comprising:

[0021] S1: directly extending the measuring probe into the riverbed portion where the scouring pit is formed, recording the corresponding position as position 1, and then moving the measuring probe to a position above the water surface;

[0022] S2: The measuring probe is positioned directly above each scouring point at different time periods. When the measuring probe touches the riverbed, the current position is recorded as position 2. The height difference between position 1 and position 2 is calculated as the depth of the scouring pit.

[0023] S3: Automatically measure the position and collect data at regular intervals to achieve high-frequency measurement.

[0024] The present invention discloses the following technical effects: the present invention discloses a local scour measurement device for water-blocking buildings under rapid flow conditions and a measurement method thereof, which can realize high-frequency and high-precision measurement of scour pit depth under rapid flow and high sand content conditions, overcome the limitation that traditional equipment cannot be used in silt environments, and measure values ​​by abutting the measuring probe against the riverbed, so that the data is more accurate, and can respond to environmental changes faster and more accurately, provide accurate data in time, and help to take more effective protection and governance measures later. The real-time data transmission and processing system improves the efficiency and accuracy of data processing, making scour monitoring more scientific and systematic, and the ability to fully cover the monitoring area enables the technology to be more widely used in hydrogeological research of different scales and types, providing strong technical support for water conservancy projects; multiple measuring probes can better capture tiny and rapid riverbed changes, providing data support for in-depth research on scour mechanisms;

[0025] The local scour (high frequency) measurement technology for water-blocking structures under rapid flow conditions proposed in the present invention breaks through the limitations of traditional measurement methods in complex water flow environments, and significantly improves the accuracy and efficiency of scour monitoring through high-frequency and high-precision measurement means. This innovation not only provides a strong guarantee for the safety of water conservancy projects such as bridges, but also opens up a new way for in-depth research on scour mechanisms. It provides the necessary technical support for understanding and predicting the scour process and its mechanism. The practical application value and theoretical research significance of this technology are very significant, and it is expected to have a far-reaching impact in the field of water conservancy projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 : A structural schematic diagram of a local scour measurement device for water-blocking buildings under rapid flow conditions of the present invention;

[0028] Figure 2 : Schematic diagram of the structure of the lower fixing ring of the present invention;

[0029] Figure 3 : Schematic diagram of the upper fixing ring structure of the present invention;

[0030] Figure 4 : Schematic diagram of the implementation structure of the measuring device of the present invention on the bridge pier;

[0031] Specifically, 1. measuring probe; 2. connecting rod; 3. data acquisition device; 4. signal transmission line; 5. lower fixing ring; 6. telescopic bracket; 7. upper fixing ring; 8. bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The specific embodiments are as follows:

[0035] like Figures 1 to 4As shown; the present invention discloses a local scour measuring device for water-blocking buildings under rapid flow conditions, including a fixing component, the fixing component is fixed on the pier top or pier body of the bridge pier;

[0036] Telescopic brackets 6, the top ends of the plurality of telescopic brackets 6 are fixedly connected to the bottom ends of the fixed components;

[0037] Measuring probes 1, wherein the plurality of measuring probes 1 correspond one to one with the plurality of telescopic brackets 6, and the top of the measuring probe 1 is fixedly connected to the bottom of the telescopic bracket 6;

[0038] A sensor is fixed at the bottom end of the measuring probe 1;

[0039] The data collector 3 is used to receive and process the data collected by the sensor. The sensor is connected to the data collector 3 via a signal transmission line 4. The data collector 3 is fixed on the fixing device.

[0040] The remote monitoring center, the data collector 3 is connected with the remote monitoring center via a wireless network.

[0041] The present invention adopts a telescopic bracket 6 design, which has strong adaptability and can be used for measurements at different water depths; the fixing device has a stable structure and can perform reliable measurements under rapid flow conditions; it has high-frequency measurement capabilities, and multiple measuring probes 1 are arranged, which can monitor the changes in the riverbed in real time within a certain range, obtain the rapid change process of the riverbed, and provide accurate data for scour research. The data processing and transmission functions are perfect, supporting real-time remote monitoring and analysis, which is conducive to timely detection of problems and taking measures; the design is flexible, and the number and arrangement of the measuring probes 1 can be adjusted according to different measurement requirements, and it is suitable for various complex scour situations.

[0042] In this embodiment, the data collector 3 has a built-in high-performance microprocessor and a large-capacity memory, which can process and store the measured data in real time. The data collector 3 has a high-frequency sampling capability and can collect data in a short time (such as multiple times per second) to achieve continuous monitoring of the flushing process. In addition, the data collected by the sensor is transmitted to the data collector 3 through the signal transmission line 4. The data collector 3 also has a wireless transmission function, which can transmit the data to the remote monitoring center in real time, supporting real-time data analysis and early warning.

[0043] In this embodiment, the outer side of the signal transmission line 4 is wrapped with a waterproof layer to ensure reliable operation in an underwater environment. The signal transmission line 4 is made of anti-interference materials to ensure the stability and accuracy of signal transmission in a complex water flow environment.

[0044] In this embodiment, the sensor can be a remote sensing sensor, a laser radar sensor, or an ultrasonic sensor; and can achieve a spatial resolution of 1 mm. In specific cases, the accuracy of the sensor at the bottom of the measuring probe 1 is adjusted as needed to ensure high measurement accuracy, so that the measuring device can capture tiny changes in the riverbed and provide more detailed and accurate data for studying the scouring process.

[0045] In this embodiment, the measurement probes 1 are arranged in number and position according to local measurement requirements to ensure the measurement range and accuracy.

[0046] In this embodiment, the fixing assembly includes an upper fixing ring 7 and a lower fixing ring 5, and the upper fixing ring 7 and the lower fixing ring 5 are fixedly connected by a plurality of connecting rods 2, and the plurality of connecting rods 2 correspond one by one to a plurality of telescopic brackets 6, the bottom end of the connecting rod 2 passes through the lower fixing ring 5 and is fixedly connected to the top of the telescopic bracket 6, the top end of the connecting rod 2 is fixedly connected to the bottom end of the upper fixing ring 7, the connecting rod 2 is fixedly connected to the lower fixing ring 5, and the data collector 3 is fixed to the top of the lower fixing ring 5.

[0047] In this embodiment, the upper fixing ring 7 and the lower fixing ring 5 are both composed of two semicircular rings, and the two semicircular rings are fixed to the pier top or pier body of the bridge pier by bolts 8 and nuts to ensure that they do not deviate left or right or up or down when the measuring probe 1 moves up and down, thereby ensuring the accuracy of the measurement.

[0048] The two fixing rings of the present invention are fixed to the building to be tested (such as a bridge pier), and the shape of the center hole of the fixing ring of the present invention can be designed into a corresponding shape according to the building, so as to facilitate fixing.

[0049] In this embodiment, the telescopic bracket 6 includes an inner rod, an outer rod, a threaded rod and a motor. The inner rod and the outer rod are hollow inside. The motor is fixed at the top of the inner rod, and the output end of the motor is fixedly connected to the top of the threaded rod. An external thread is provided on the outer wall of the threaded rod, and an internal thread matching the external thread is provided on the inner wall of the outer rod. The top of the inner rod is fixedly connected to the bottom end of the connecting rod 2, and the bottom end of the outer rod is fixedly connected to the top of the measuring probe 1. The outer rod slides up and down along the axial direction on the outside of the inner rod.

[0050] In this embodiment, the inner rod and the connecting rod 2 of the telescopic bracket 6 can be integrated into one, the top end of the inner rod is fixedly connected to the bottom end of the upper fixing ring 7, the outer rod passes through the lower fixing ring 5, and is slidably connected to the lower fixing ring 5. The telescopic bracket 6 is doubly restricted by the two fixing rings of the upper fixing ring 7 and the lower fixing ring 5 to prevent the inner rod and the outer rod from shaking left and right during telescoping when they are too thin, thereby improving the stability of the measurement.

[0051] The present invention provides a motor to drive the threaded rod to rotate, and the threaded rod rotates to control the outer rod to slide up and down during the rotation process, thereby driving the measuring probe 1 to move up and down to achieve measurement of different water depths.

[0052] In this embodiment, the measuring probe 1 is made of stainless steel, with a diameter of 8 mm and a length of 1.3 m.

[0053] In this embodiment, the measuring probe 1 is a slender rod structure, which is used to be inserted into the area to be measured for measurement. The measuring probe 1 is made of anti-corrosion materials such as stainless steel to be suitable for long-term use in underwater environments. Due to its slender structure, an upper fixing ring 7 and a lower fixing ring 5 are provided to perform double fixing restrictions on its overall measuring structure to ensure that the measuring probe will not shake left and right, thereby ensuring the accuracy and stability of the measurement results and improving the accuracy of the measurement results.

[0054] In this embodiment, the connecting rod 2 is made of a rigid material, has a stable structure, and is not easy to break, thereby ensuring the stability of the measuring probe 1 .

[0055] In this embodiment, the adjustment range of the telescopic bracket 6 is 0.5-20m.

[0056] The telescopic bracket 6 of the present invention is used to support and adjust the height of the measuring probe 1, so that it can be adapted to different water depth measurement requirements and can perform effective measurement from shallow water areas to deep water areas.

[0057] A method for measuring the local scour of a water-blocking building under rapid flow conditions is also disclosed, comprising:

[0058] S1: directly extend the measuring probe 1 into the riverbed portion where the scour pit is formed at the upper position, record the corresponding position as position 1, and then move the measuring probe 1 to a position above the water surface;

[0059] S2: The measuring probe 1 is positioned directly above each scouring point at different time periods. When the measuring probe 1 touches the riverbed, the current position is recorded as position 2. The height difference between position 1 and position 2 is calculated as the depth of the scouring pit.

[0060] S3: Automatically measure the position and collect data at regular intervals to achieve high-frequency measurement.

[0061] In this embodiment, the measuring probe 1 frequently and continuously monitors the changes in the depth of the scouring pit and collects data. By analyzing the changing trends of these data, it is possible to quickly determine whether the scouring pit has reached a state of equilibrium. It can also capture the rapidly changing riverbed morphology, providing dynamic information that cannot be obtained by traditional measurement methods.

[0062] In this embodiment, at the end of the test, in order to verify the accuracy of the measurement data, the present invention also includes an important data verification step: as the water body is gradually drained, the researchers use high-precision optical scanning equipment to make a final measurement of the bottom of the riverbed. This method can provide a detailed three-dimensional image of the riverbed morphology, which is compared with the data collected by the device of the present invention, and the measurement results are basically consistent.

[0063] In this embodiment, when the measurement object is a circular bridge pier, the following arrangement can be adopted: the upper fixing ring 7 and the lower fixing ring 5 are fixed on the top of the bridge pier, and the outer periphery of the circular bridge pier is divided into 8 equal parts. The measuring probes 1 are arranged on these 8 equally divided lines, and 4 measuring probes 1 are arranged on each line. This arrangement can fully cover the scouring area around the bridge pier and provide detailed scouring data. The prefabricated holes on the lower fixing ring 5 are designed as follows: Figure 2 As shown, this design allows the position and number of the measuring probes 1 to be flexibly adjusted to meet different measurement requirements.

[0064] During the actual measurement process, the measuring probe 1 moves vertically and measures directly above each predetermined scour point. This precise positioning method ensures the accuracy and comparability of the measurement data. By performing high-frequency measurements at different locations and time points, the present invention can fully understand the spatial distribution characteristics of scour and its changes over time. This detailed data collection is of great significance for in-depth research on local scour mechanisms and the formulation of effective protective measures.

[0065] Specific test process:

[0066] The upper fixing ring and the lower fixing ring are installed on the circular pier, and the periphery of the circular pier is divided into 8 sectors. The angle of each sector is 45 degrees. Four measuring probes are installed on the radial line of each sector, for a total of 32 measuring probes. The measuring probes are evenly distributed along the radial direction. The first probe is 0.1D away from the pier surface (D is the pier diameter), and the last probe is 1.0D away from the pier surface.

[0067] In this embodiment, the specific parameters of the measuring probe are as follows:

[0068] It is made of stainless steel, with a diameter of 8mm and a length of 1.5m. A high-precision contact sensor is installed at the lower end of the measuring probe, with an accuracy of up to 0.1mm.

[0069] The measurement process is as follows:

[0070] First, before the test begins, the initial positions of all measuring probes 1 are recorded. Then, the water flow is started to simulate rapid conditions (flow velocity greater than 1 m / s). A comprehensive measurement is performed every 10 minutes. All probes are simultaneously lowered until they touch the riverbed surface. The position change of each probe is recorded by the data logger 4. The measurement is continued for 24 hours or until the scouring depth becomes stable.

[0071] The data processing steps are as follows:

[0072] The scour depth of each measuring point, i.e., the difference between the current position and the initial position, is calculated, a graph of the scour depth changing with time is plotted, and a three-dimensional model of the scour pit around the bridge pier is generated to show the spatial distribution of the scour.

[0073] The verification steps are as follows:

[0074] After the test, the tank was slowly drained and a high-precision laser scanner was used to perform a 3D scan of the scour pit. The scan results were compared with the measured data to verify the measurement accuracy.

[0075] Results analysis includes:

[0076] Determine the maximum scour depth and its location, analyze the trend of scour depth over time, and evaluate the scour differences at different locations of the bridge pier.

[0077] In the present invention, by arranging multiple measuring probes around the circular bridge pier, comprehensive coverage of the entire scouring area is achieved. High-frequency measurements can capture rapid changes in the scouring process, while high-precision sensors ensure the accuracy of the measurement data. This measurement method provides reliable data support for studying the scouring mechanism around bridge piers under rapid conditions.

[0078] The working principle of the local scour measurement device and the measurement method of the rapid flow condition water-blocking building of the present invention is as follows: first, the device is fixed on the building to be measured (bridge pier) through the lower fixing ring 3 and the upper fixing ring 7, and then the length of the telescopic bracket 6 is adjusted so that the measuring probe 1 can reach the predetermined measuring position. Before the measurement starts, the initial position (position 1) of the measuring probe 1 is recorded. During the measurement process, the high-precision sensor at the lower end of the measuring probe 1 continuously detects the height change of the riverbed surface, and transmits the data to the data acquisition device 4 through the signal transmission line 5. The data acquisition device 4 processes and stores the received data in real time, calculates the height difference between the current position (position 2) and the initial position, which is the depth of the scour pit. The data acquisition device 4 can perform high-frequency data acquisition, and records data every extremely short time interval (such as a few seconds or tens of seconds), so as to capture the rapid change process of the riverbed. If necessary, the data acquisition device 4 can wirelessly transmit the processed data to the remote monitoring center to realize real-time monitoring and analysis.

[0079] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A local scour measurement device for water-blocking buildings under rapid flow conditions, characterized in that: include A fixing assembly, wherein the fixing assembly is fixed to the pier top or pier body of the bridge pier; A telescopic bracket, wherein the top ends of the plurality of telescopic brackets are fixedly connected to the bottom ends of the fixed components; Measuring probes, wherein a plurality of the measuring probes correspond to a plurality of the telescopic brackets one by one, and a top end of the measuring probe is fixedly connected to a bottom end of the telescopic bracket; A sensor, wherein the sensor is fixed at the bottom end of the measuring probe; A data collector, the sensor is connected to the data collector via a signal transmission line, and the data collector is fixed on the fixing device; A remote monitoring center, wherein the data collector is connected to the remote monitoring center via a wireless network.

2. A local scour measurement device for water-blocking buildings under rapid flow conditions according to claim 1, characterized in that: The fixing assembly includes an upper fixing ring and a lower fixing ring, the upper fixing ring and the lower fixing ring are fixedly connected by a plurality of connecting rods, and the plurality of connecting rods correspond one-to-one to the plurality of telescopic brackets, the bottom end of the connecting rod passes through the lower fixing ring and is fixedly connected to the top end of the telescopic bracket, and the data collector is fixed on the top end of the lower fixing ring.

3. A local scour measurement device for water-blocking buildings under rapid flow conditions according to claim 2, characterized in that: The upper fixing ring and the lower fixing ring are both composed of two semicircular rings, and the two semicircular rings are fixed to the pier top or pier body of the pier by bolts and nuts.

4. A local scour measurement device for water-blocking buildings under rapid flow conditions according to claim 2, characterized in that: The telescopic bracket includes an inner rod, an outer rod, a threaded rod and a motor. The inner rod and the outer rod are both hollow. The motor is fixed to the top of the inner rod. The output end of the motor is fixedly connected to the top of the threaded rod. An outer wall of the threaded rod is provided with an outer thread. An inner wall of the outer rod is provided with an inner thread matching the outer thread. The top of the inner rod is fixedly connected to the bottom end of the connecting rod. The bottom end of the outer rod is fixedly connected to the top of the measuring probe. The outer rod slides up and down along the axial direction outside the inner rod.

5. The local scour measurement device for water-blocking buildings under rapid flow conditions according to claim 1, characterized in that: The measuring probe is made of stainless steel, has a diameter of 5-10 mm and a length of 0.5-2 m.

6. A local scour measurement device for water-blocking buildings under rapid flow conditions according to claim 4, characterized in that: The adjustment range of the telescopic bracket is 0.5-20m.

7. A method for measuring the local scour measurement device for water-blocking buildings under rapid flow conditions according to any one of claims 1 to 6, characterized in that: include S1: directly extending the measuring probe into the riverbed portion where the scour pit is formed, recording the corresponding position as position 1, and then moving the measuring probe to a position above the water surface; S2: The measuring probe is positioned directly above each scouring point at different time periods, and automatically measures at regular intervals. When the measuring probe touches the riverbed, the current position is recorded as position 2, and the height difference between position 1 and position 2 is calculated as the depth of the scouring pit; S3: Collect data.

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