An ultrasonic detection method for monitoring local scour of an existing bridge

Abstract

The application discloses a kind of ultrasonic detection impending local scour of existing bridge crossing monitoring method, and the specific steps of the method include S1: according to the geological and hydrological investigation carried out in advance, determine monitoring point position, S2: install ultrasonic depth finder at the monitoring point determined and fix ultrasonic depth finder, S3: start ultrasonic depth finder, according to the frequency and mode of pre-set, continuously measure riverbed, measure water depth by emitting ultrasonic wave and receiving its echo, obtain the shape and change condition data of riverbed, S4: using data analysis software processes the data collected, generates riverbed section and scour trend chart;The ultrasonic detection impending local scour of existing bridge crossing monitoring method, solve the problem that the prior art method exists low efficiency, data is not accurate, cannot real-time monitoring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge hydrological monitoring, and particularly relates to an ultrasonic detection method for monitoring local scouring near an existing bridge. BACKGROUND

[0002] In bridge engineering, construction of bridge piers often causes scouring impact on the surrounding riverbed, especially when construction is carried out near an existing bridge, local scouring may lead to reduced stability of the bridge pier, and even safety accidents.

[0003] The existing method for monitoring local scouring near an existing bridge usually adopts direct observation of the riverbed by divers or water observation personnel, but this method is highly dangerous and risky, and manual direct observation is not continuous and accurate enough for data acquisition. The riverbed condition is recorded by using underwater photography equipment, which can obtain visual information, but it is difficult to monitor the scouring depth and range in real time. Hydrological measurement tools such as echo sounders and flowmeters are also used, but these methods usually need to be performed periodically and cannot achieve continuous monitoring, and the data processing is relatively cumbersome. Therefore, the existing method has problems such as low efficiency, inaccurate data, and inability to monitor in real time. SUMMARY

[0004] The present application aims to provide an ultrasonic detection method for monitoring local scouring near an existing bridge, which solves the problems of low efficiency, inaccurate data, and inability to monitor in real time in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: an ultrasonic detection method for monitoring local scouring near an existing bridge, the method comprising the following specific steps:

[0006] S1: determining the position of the monitoring point according to the pre-conducted geological and hydrological survey;

[0007] S2: installing an ultrasonic depth finder at the determined monitoring point and fixing the ultrasonic depth finder;

[0008] S3: starting the ultrasonic depth finder, continuously measuring the riverbed according to the preset frequency and mode, measuring the water depth by emitting ultrasonic waves and receiving their echoes, and obtaining the shape and change data of the riverbed;

[0009] S4: processing the collected data using data analysis software to generate a riverbed cross-section diagram and a scouring trend diagram.

[0010] Preferably, the selection of the monitoring point position in step S1 ensures that the monitoring point covers the key area where scouring may occur.

[0011] Preferably, the selection of the monitoring point position in step S1 should be based on the riverbed topography, water flow speed and direction, and the specific layout of the bridge pier.

[0012] Preferably, the fixing device is used to fix the ultrasonic depth finder in step S2 to prevent displacement and damage of the ultrasonic depth finder.

[0013] Preferably, after obtaining the shape and change data of the riverbed in step S3, the monitoring data is transmitted to the remote monitoring center in real time by using wireless transmission technology.

[0014] Preferably, the remote monitoring center is equipped with professional data processing software for receiving, storing and analyzing data.

[0015] Preferably, in step S4, the professional personnel of the remote monitoring center use data analysis software to process the collected data to generate riverbed cross-section graph and scouring trend graph to facilitate the analysis of the scouring development trend.

[0016] Preferably, according to the data analysis results, the severity and development trend of local scouring are evaluated, and if the scouring depth exceeds the safety threshold or has an accelerating trend, measures should be taken immediately to remedy.

[0017] From the above technical solution, the present application has the following beneficial effects:

[0018] The ultrasonic detection method for monitoring local scouring near existing bridges can continuously measure the riverbed according to the preset frequency and mode by starting the ultrasonic depth finder, measure the water depth by emitting ultrasonic waves and receiving their echoes, obtain the shape and change data of the riverbed, improve the real-time and accuracy of the monitoring, use data analysis software to process the collected data to generate riverbed cross-section graph and scouring trend graph, set fixed measuring points and continuous measuring point lines, can detailedly master the change of the riverbed shape, and timely find potential safety hazards; the use of wireless transmission module realizes the remote transmission and real-time monitoring of data, greatly improves the efficiency and safety of the monitoring work, solves the problems of high risk and high risk of direct observation of the riverbed by divers or water observation personnel, and the problem of insufficient continuity and accuracy of data acquisition by direct observation of artificial observation; although the use of underwater photography equipment can record the riverbed condition and obtain visual information, it is difficult to monitor the scouring depth and range in real time, and the use of hydrological measurement tools usually needs to be carried out regularly, cannot realize continuous monitoring, and the data processing is relatively cumbersome. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 The figure is a flowchart of the method of the present application;

[0020] Fig. 2 The figure is a plan view of the ultrasonic depth finder arranged on the monitoring point of the present application;

[0021] Fig. 3 The top view of the ultrasonic depth finder arranged on the monitoring point of the application.

[0022] In the figure: 1, existing pier; 2, newly built pier; 3, ultrasonic depth finder; 4, buoyancy connecting ring; 5, ultrasonic buoyancy support; 6, positioning and linking guide chain; 7, air pump and power distribution device. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0024] As shown in the figure, an ultrasonic detection method for monitoring local scouring of an existing bridge pier, the method specifically comprises the following steps: Figs. 1-3

[0025] S1: determining the position of the monitoring point according to the pre-conducted geological and hydrological investigation;

[0026] S2: installing the ultrasonic depth finding equipment at the determined monitoring point and fixing the ultrasonic depth finding equipment;

[0027] S3: starting the ultrasonic depth finding equipment, continuously measuring the riverbed according to the preset frequency and mode, measuring the water depth by emitting ultrasonic waves and receiving the echo, and obtaining the shape and change data of the riverbed;

[0028] S4: processing the collected data using data analysis software to generate the riverbed section graph and scouring trend graph.

[0029] In the specific implementation process, the ultrasonic depth finder 3 is installed at the key positions around the existing pier 1, and the devices should select the waterproof and weather-resistant models to meet the requirements of the underwater environment. The selection of the device installation position should be based on the riverbed topography, water flow speed and direction, and the specific layout of the pier. Usually, monitoring points are set at the upstream, downstream and both sides of the pier to ensure omnidirectional monitoring of local scouring and realize the construction of the monitoring system.

[0030] In the monitoring point arrangement and fixing step, the specific position of the monitoring point is determined according to the pre-conducted geological and hydrological investigation, and it is ensured that the monitoring point can cover the key areas where scouring may occur. Professional fixing devices such as anchoring systems or underwater supports are used to ensure the stability of the ultrasonic depth finder 3 under the action of water flow and prevent the displacement or damage of the equipment.

[0031] ​The ultrasonic depth finder 3 is started, and the riverbed is continuously measured according to the preset frequency and mode. The ultrasonic depth finder 3 measures the water depth by emitting ultrasonic waves and receiving their echoes, thereby obtaining the shape and changes of the riverbed. The monitoring data is transmitted in real time to the remote monitoring center by wireless transmission technology such as wireless network, satellite communication, etc. The monitoring center should be equipped with professional data processing software for receiving, storing and analyzing data, realizing the collection and transportation of data. The ultrasonic sounding instrument 3 and the ultrasonic buoyancy support 5 are connected with the existing bridge pier 1 through positioning and linking guide chain 6. The air pump and power distribution device 7 are installed beside the existing bridge pier 1 as power output. The ultrasonic buoyancy support 5 is arranged beside the ultrasonic sounding instrument 3. The ultrasonic buoyancy support 5 and the ultrasonic sounding instrument 3 surround the existing bridge pier 1. The ultrasonic buoyancy support 5 and the ultrasonic sounding instrument 3 surround the existing bridge pier 1 layer by layer outward through the buoyancy connecting ring 4. The size of the buoyancy connecting ring 4 is determined according to the size calculation of the measuring point. The number of measurement rings is determined according to the actual situation. The actual arrangement only has one ring of equipment.

[0032] The professional personnel of the monitoring center use data analysis software to process the collected data to generate riverbed cross-section graph and scouring trend graph for the engineering and technical personnel to evaluate and make decisions. According to the data analysis results, the severity and development trend of local scouring are evaluated. If it is found that the scouring depth exceeds the safety threshold or has an accelerating trend, measures should be taken immediately, such as adjusting the construction plan, strengthening the riverbed protection, etc. Countermeasures are taken for the problems found in the analyzed data.

[0033] Then a safety warning mechanism is established. When the monitoring data indicates that there may be scouring problems, the construction team is warned in time to start the emergency response program. The emergency response measures may include reinforcing the bridge pier, adjusting the construction method, limiting or stopping the construction, etc. to ensure the safety of construction and the quality of the project. The ultrasonic depth sounding equipment is regularly maintained and calibrated to ensure the accuracy and reliability of the monitoring data. For any equipment failure or data anomaly, troubleshooting and repair should be carried out in time to avoid monitoring interruption or data loss. The system is maintained and calibrated.

[0034] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for monitoring localized scour near existing bridges using ultrasonic detection, characterized in that, The method comprises the following steps: S1: According to the geological and hydrological survey in advance, determine the monitoring point position; S2: Install the ultrasonic depth finder at the determined monitoring point and fix it; S3: Start the ultrasonic depth finder, continuously measure the riverbed according to the preset frequency and mode, measure the water depth by emitting ultrasonic waves and receiving the echo, and obtain the shape and change data of the riverbed; S4: Use data analysis software to process the collected data to generate riverbed cross-section and erosion trend chart; The ultrasonic depth finder comprises an ultrasonic probe (3), the ultrasonic probe (3) and the ultrasonic buoyancy support (5) are connected with the existing bridge pier (1) through positioning and linking guide chain (6), the ultrasonic probe (3) is provided with ultrasonic buoyancy support (5) beside it, the ultrasonic buoyancy support (5) and the ultrasonic probe (3) surround the existing bridge pier (1), the ultrasonic buoyancy support (5) and the ultrasonic probe (3) surround the existing bridge pier (1) as the center layer by layer outward through the buoyancy connecting ring (4); and by inflating the buoyancy connecting ring (4) to expand or reduce its size, so as to adapt to the actual arrangement requirements at the monitoring point.

2. The method according to claim 1, wherein the method is characterized by: The selection of monitoring point position in step S1 ensures that the monitoring point can cover the key area where scouring may occur.

3. The method according to claim 1, wherein the method is characterized by: The selection of monitoring point position in step S1 should be based on the riverbed topography, water flow speed and direction, and the specific layout of the bridge pier.

4. The method according to claim 1, wherein the method is characterized by: In step S2, the ultrasonic depth finder is fixed by using a fixing device to prevent displacement and damage of the ultrasonic depth finder.

5. The method according to claim 1, wherein the method is characterized by: After obtaining the shape and change data of the riverbed in step S3, the monitoring data is transmitted to the remote monitoring center in real time by using wireless transmission technology.

6. The method according to claim 5, wherein the method is characterized by: The remote monitoring center is equipped with professional data processing software for receiving, storing and analyzing data.

7. The method according to claim 1, wherein the method is characterized by: In step S4, the professional personnel of the remote monitoring center use data analysis software to process the collected data to generate riverbed cross-section and erosion trend chart, so as to analyze the erosion development trend.

8. The method according to claim 7, wherein the method is characterized by: According to the data analysis results, the severity and development trend of local scouring are evaluated, if the scouring depth exceeds the safety threshold or has an accelerating trend, measures should be taken immediately to remedy.

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