A method for assisting on-site point finding in subway tunnel settlement monitoring

Abstract

The present invention provides a method for assisting on-site point location in subway tunnel settlement monitoring, comprising the following steps: affixing a QR code for a leveling point on the tunnel wall near pre-installed leveling points within the subway tunnel; planning the current subway tunnel settlement monitoring task through a software system; estimating the number of stations required between each leveling point and the approximate number of steps required for an observer to reach each station based on the plan; following prompts from the software system, the observer arrives near any leveling point with a QR code; scanning the QR code to obtain the location information of the leveling point, and comparing and confirming it with the leveling points planned by the software system. The present invention solves the problem of being unable to locate monitoring points or measuring the wrong monitoring points when manually carrying out subway tunnel settlement monitoring tasks using leveling technology.

Description

Technical Field

[0001] The present invention relates to the technical field of subway tunnel monitoring, and in particular to an auxiliary on-site point finding method for subway tunnel settlement monitoring. Background Art

[0002] During the construction of subway tunnel structures, uneven settlement is common due to their wide distribution, complex construction environment, and the pressure and loads on the sidewalls. Disturbance to the rock mass can also cause deformation in the subway tunnel, which can pose serious safety risks to the tunnel and surrounding structures. Therefore, regular settlement observations of subway tunnel structures are necessary. By comparing the height differences of monitoring points, deformation of the subway tunnel can be detected in a timely manner to maintain subway tunnel safety. Current subway tunnel structure observations are generally based on leveling technology. Benchmarks are buried along the subway tunnel route as monitoring points. Manual elevation measurements are performed point by point using a level rod. Subway tunnel settlement is determined by comparing the elevation differences between each point over time. However, due to the frequent changes in surveyors during measurement tasks, the work is labor-intensive and time-consuming. Different surveyors have different levels of familiarity with the pre-installed monitoring points. Furthermore, due to the dim tunnel monitoring environment, confined space, and small size of the monitoring points, it is very easy to miss or even mistakenly locate points during regular settlement monitoring.

[0003] The prior art CN114234914A discloses a method and system for monitoring settlement of a dark-bored tunnel. The method uses a plurality of prisms in combination with a total station, and sends settlement information back to a monitoring terminal, making monitoring more convenient and ensuring the safety of the subway line. However, the acquisition of the original monitoring data entirely depends on the monitoring terminal, and the position of the prism will change with the settlement of the tunnel, so the reliability of the data cannot be guaranteed. Summary of the Invention

[0004] To solve this problem, the present invention proposes a method for assisting on-site point location in subway tunnel settlement monitoring. This method solves the problem of being unable to locate monitoring points or measuring wrong monitoring points when manually carrying out subway tunnel settlement monitoring tasks using leveling technology. The specific technical solution is as follows:

[0005] A method for assisting on-site point finding in subway tunnel settlement monitoring includes the following steps:

[0006] S1. According to the pre-installed level monitoring points in the subway tunnel, a QR code of the level monitoring point is affixed to the tunnel wall near each level monitoring point;

[0007] S2. Plan the current subway tunnel settlement monitoring tasks through the software system according to the subway tunnel settlement monitoring specifications and requirements;

[0008] S3. Determine the location information based on the subway tunnel settlement monitoring plan of the software system and, in combination with subway tunnel settlement monitoring specifications and requirements, estimate the number of stations required between each leveling monitoring point and the approximate number of steps required for an observer to reach each station;

[0009] S4. When performing subway tunnel settlement monitoring tasks, the observer follows the software system prompts and the mobile phone pedometer function to advance the monitoring task along the route planned by the software system, and makes slight adjustments based on actual conditions until reaching the vicinity of any level monitoring point with a level monitoring point QR code;

[0010] S5. Scan the QR code of the level monitoring point to obtain the location information of the level monitoring point, and compare and confirm it with the level monitoring point planned by the software system. After confirming that the location is correct, continue to advance the monitoring task as planned. If the location is wrong, correct it and find the correct level monitoring point.

[0011] Furthermore, level monitoring points are set at fixed intervals within the subway tunnel monitoring area and are pre-buried in a uniform position in the subway tunnel in sequence along the direction of the subway tunnel structure.

[0012] Furthermore, the location information includes the number, name and interval between level monitoring points. The level monitoring point QR code contains the name, attributes and distance of the current level monitoring point and adjacent level monitoring points. The level monitoring point QR code of each level monitoring point is placed in a unified location within the subway tunnel.

[0013] Furthermore, the software system can be connected to the network for signal connection and store measurement data information, so that users can communicate with each other.

[0014] Furthermore, within the subway tunnel monitoring area, the distance between leveling monitoring point i and leveling monitoring point i+1 is set to S according to the current subway tunnel settlement monitoring task plan. Based on the subway tunnel settlement monitoring specifications and the sum of the front and rear sight distances of the measuring stations specified by the requirements, the required number of measuring stations N is calculated:

[0015] N=S / L

[0016] Assuming the average step length of the observers is C, we can calculate that each station requires a total of M steps:

[0017] M=L / C.

[0018] Furthermore, when the monitoring task is actually carried out, at least three observers, A, B, and C, are involved. A holds the rear ruler, B holds the front ruler, and C controls the observation instrument. The three observers all have software systems installed on their mobile phones, and they can communicate with each other through the software system.

[0019] A, B, and C start from the subway tunnel entrance at the same time. After arriving at the i-th leveling monitoring point, A holds up the rear ruler and scans the QR code of the leveling monitoring point near the leveling monitoring point. The point information is automatically input into the software system. The software system prompts B and C to the position of A, and A's position is used as the rear ruler position. At the same time, the software system prompts B and C to continue forward M / 2 steps. At this time, C sets up the observation instrument, and B continues to move forward M / 2 steps. After arriving, the front ruler is erected at the same position, and B's position is used as the front ruler position. After the three people arrive at their respective positions, they all report to the software system for contact and adjustment;

[0020] Among them: In order to ensure that the front and rear sight distances are equal at the observation instrument at M / 2 to meet the subway tunnel settlement monitoring standards and requirements, C immediately carried out the settlement monitoring task, read the data of the rear and front scales to obtain the elevation data corresponding to the station location, and then stored the data in the software system and operated the display to complete the measurement station. The observation of this measurement station is completed;

[0021] The software system then prompts A, who is the rear ruler, to become the front ruler in the next monitoring task, and B remains at the original position and automatically becomes the rear ruler in the next monitoring task. The software system then prompts A and C to carry the observation instrument to B's position first and start from B's position, then walk forward M / 2 steps. The software system prompts C to set up the observation instrument at his position, and A continues to walk forward M / 2 steps and then erects the front ruler at his position. After the three people arrive at their respective positions, they still report to the software system that they have arrived at their respective positions. C then performs the settlement monitoring task, reads the data of the rear ruler and the front ruler to obtain the elevation data corresponding to the station location, and after the reading is completed, the data is stored in the software system and the operation display station is completed. The monitoring is carried out alternately until the Nth station, and communication is carried out in the software system at any time. Finally, when the three people are about to reach the i+1th leveling monitoring point, they scan the QR code of the leveling monitoring point to obtain the point information of the leveling monitoring point and compare whether it is the i+1th leveling monitoring point. If correct, they erect the level ruler normally at the leveling monitoring point to perform the settlement monitoring task. If not, they make corrections according to the actual situation to reach the correct position.

[0022] Preferably, the observation instruments used by observers when performing settlement monitoring tasks are placed without obstruction and maintain line of sight, and the observation instruments used comply with the standards and requirements for subway tunnel settlement monitoring.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention sets a QR code containing detailed information of the point near each monitoring point. First, the system plans the subway tunnel monitoring plan to be executed to determine the points that need to be monitored for this measurement task. During the on-site measurement, according to the monitoring plan formulated by the system, the mobile phone pedometer software is used to interact with the system. The number of steps and distance during measurement are entered into the system. The system prompts the surveyor to advance the route and look for monitoring points. When arriving at a monitoring point, the surveyor scans the QR code with the mobile phone to obtain detailed information of the monitoring point and automatically enters it into the system to determine the accuracy of the monitoring point and ensure the validity of the original monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of the auxiliary on-site point-finding method used in subway tunnel settlement monitoring.

[0026] Figure 2 This is a schematic diagram of the QR code point information used in the method of assisting on-site point finding in subway tunnel settlement monitoring according to the present invention.

[0027] Figure 3 The figure is a schematic diagram of setting up leveling monitoring points for assisting on-site point finding method in subway tunnel settlement monitoring according to the present invention. DETAILED DESCRIPTION

[0028] The present invention is further illustrated below through the description of specific implementation methods, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not deviate from the basic idea of ​​the present invention, they are all within the scope of protection of the present invention.

[0029] The main idea of ​​the present invention is to post a QR code containing the point information near the settlement monitoring leveling point in the subway tunnel, pre-formulate the current subway tunnel settlement monitoring plan according to the subway tunnel settlement monitoring specifications and requirements, and use the software system to determine the points that need to be monitored during on-site measurement, and estimate the current monitoring task route and the step distance to the point. The monitoring points are searched in sequence using the mobile phone's pedometer function. When any monitoring point is reached, the surveyor scans the QR code with the mobile phone to identify the point and synchronize it with the system to judge and confirm the correctness of the point. This solves the problem of not being able to find the monitoring point or measuring the wrong monitoring point when manually carrying out the subway tunnel settlement monitoring task using leveling technology.

[0030] See Figures 1 to 3 , an embodiment provided by the present invention is as follows:

[0031] (1) According to the settlement monitoring leveling points laid out in advance in the subway tunnel, a point information QR code is attached to the tunnel wall near each leveling monitoring point. In this embodiment, the QR code of each monitoring point in the tunnel is placed on the side wall of the subway tunnel at the leveling monitoring point.

[0032] (2) In this embodiment, the tunnel level monitoring point 1 is posted with QR code information:

[0033] Level monitoring point: 1;

[0034] Attributes: Level monitoring point;

[0035] Position: The absolute mileage of the current position is 0.01 km;

[0036] Nearby points: Level monitoring point 2;

[0037] Location: On the right side of the current location, 300m away from leveling monitoring point 1;

[0038] Tunnel level monitoring point 2, with QR code information:

[0039] Level monitoring points: 2;

[0040] Attributes: Level monitoring point;

[0041] Position: The absolute mileage of the current position is 0.31 kilometers;

[0042] Nearby points: Level monitoring point 1;

[0043] Location: On the left side of the current location, 300m away from leveling monitoring point 2;

[0044] Nearby points: Level monitoring point 3;

[0045] Location: On the right side of the current location, 280m away from leveling monitoring point 2;

[0046] (2) According to the subway tunnel settlement monitoring specifications and requirements, the software system plans the current subway tunnel settlement monitoring interval to be 600m. The task planning sets the distance between leveling monitoring point 1 and leveling monitoring point 2 to be S = 300m. According to the subway tunnel settlement monitoring specifications, the sum of the front and rear sight distances of a measuring station is set to L < 75m. The subway tunnel settlement monitoring specifications stipulate that the station distance shall not exceed 75m. The required number of measuring stations N can be calculated as:

[0047] N=S / L=4

[0048] Assuming the average stride length of an adult is C = 0.65m, then we can calculate that a total of M steps are required for a station.

[0049] M=L / C≈115

[0050] (3) When actually performing the observation task, the specifications of the measuring instruments such as levels and level rods used by the three observers A, B and C all comply with the subway tunnel settlement monitoring specifications.

[0051] The observation task is carried out according to the path and number of steps planned by the system, and then the correctness of the leveling monitoring point is determined by scanning the QR code information. Observer A erects the rear ruler at the first leveling point, Observer B erects the front ruler, and Observer C controls the level and other observation instruments. The three communicate with each other through the software system in the mobile phone.

[0052] Three people, A, B, and C, set out simultaneously from the subway tunnel entrance. Upon reaching the first leveling point, Observer A scans a QR code near the point, automatically entering the point information into the system. The system then notifies Observers B and C that Observer A has reached the first leveling point and that Observer A will serve as the back ruler. Observers B and C are then instructed to move forward approximately 58 steps. Observer C sets up the level and other observation instruments, while Observer B continues forward 58 steps and, upon reaching their respective positions, erects the front ruler. Upon reaching their respective positions, Observers A, B, and C all report their positions to the system and make adjustments.

[0053] Observer C then conducts the settlement observation task. While operating the measuring instruments, there must be no obstructions and a clear line of sight must be maintained. He reads the front and rear scales to obtain the corresponding elevation data for the station location. This data is then stored in the system and displayed as completed. This completes the observation for the first station.

[0054] (4) The system then prompts Observer A, whose rear ruler becomes the front ruler in the second station task, and Observer B stays at the original position and becomes the rear ruler in the second station task. The system then prompts Observers A and C to carry equipment such as level rods and levels and walk to Observer B's position first. Starting from Observer B's position, they walk 58 steps forward. The system prompts Observer C to set up observation instruments such as levels on it. Observer A continues to walk 58 steps forward and then erects the front ruler at that position. After arriving at their respective positions, Observer A, B, and C still report to the system that they have arrived at their respective positions. Observer C then performs the settlement observation task. After the reading is completed, the data is stored in the system and the operation shows that the second station is completed. The observation is carried out alternately until the fourth station, and adjustments can be made at any time through the mobile phone system.

[0055] (5) When the three people are about to reach the second leveling point during the observation task, they scan the QR code to obtain the leveling monitoring point information and compare whether it is the second leveling point. If it is correct, they will erect the level rod normally on the leveling monitoring point to carry out the settlement observation task. If it is incorrect, they will make corrections based on the actual situation according to the QR code information of the second leveling monitoring point to reach the correct position.

[0056] The present invention sets a QR code containing detailed information of the point near each monitoring point. First, the system plans the subway tunnel monitoring plan to be executed to determine the points that need to be monitored for this measurement task. During the on-site measurement, according to the monitoring plan formulated by the system, the mobile phone pedometer software is used to interact with the system. The number of steps and distance during measurement are entered into the system. The system prompts the surveyor to advance the route and look for monitoring points. When arriving at a monitoring point, the surveyor scans the QR code with the mobile phone to obtain detailed information of the monitoring point and automatically enters it into the system to determine the accuracy of the monitoring point and ensure the validity of the original monitoring data.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A method for assisting on-site point finding in subway tunnel settlement monitoring, characterized in that: The following steps are involved: S1. According to the pre-installed level monitoring points in the subway tunnel, a QR code of the level monitoring point is affixed to the tunnel wall near each level monitoring point; S2. Plan the current subway tunnel settlement monitoring tasks through the software system according to the subway tunnel settlement monitoring specifications and requirements; S3. Determine the location information based on the subway tunnel settlement monitoring plan of the software system and, in combination with subway tunnel settlement monitoring specifications and requirements, estimate the number of stations required between each leveling monitoring point and the approximate number of steps required for an observer to reach each station; S4. When performing subway tunnel settlement monitoring tasks, the observer follows the software system prompts and the mobile phone pedometer function to advance the monitoring task along the route planned by the software system, and makes slight adjustments based on actual conditions until reaching the vicinity of any level monitoring point with a level monitoring point QR code; S5. Scan the QR code of the level monitoring point to obtain the location information of the level monitoring point, and compare and confirm it with the level monitoring point planned by the software system. After confirming that the location is correct, continue to advance the monitoring task as planned. If the location is wrong, correct it and find the correct level monitoring point.

2. The method for assisting on-site point finding in subway tunnel settlement monitoring according to claim 1, characterized in that: Level monitoring points are set at fixed intervals within the subway tunnel monitoring area and are pre-buried in uniform positions in the subway tunnel along the direction of the subway tunnel structure.

3. The auxiliary on-site point-finding method for subway tunnel settlement monitoring according to claim 1 is characterized in that: The location information includes the number, name and interval between level monitoring points. The level monitoring point QR code contains the name, attributes and distance of the current level monitoring point and adjacent level monitoring points. The level monitoring point QR code of each level monitoring point is placed in a unified position in the subway tunnel.

4. The method for assisting on-site point finding in subway tunnel settlement monitoring according to claim 1, characterized in that: The software system can connect signals to the network and store measurement data information, so that users can communicate with each other.

5. The method for assisting on-site point finding in subway tunnel settlement monitoring according to claim 1, characterized in that: In the subway tunnel monitoring area, according to the current subway tunnel settlement monitoring task plan, the distance between level monitoring point i and level monitoring point i+1 is set to S. According to the subway tunnel settlement monitoring specification and the sum of the front and rear sight distances of the measuring stations specified by the requirements, the required number of measuring stations N is calculated: N=S / L Assuming the average step length of the observers is C, we can calculate that each station requires a total of M steps: M=L / C.

6. The method for assisting on-site point finding in subway tunnel settlement monitoring according to claim 1, characterized in that: When actually carrying out the monitoring task, at least three observers, A, B, and C, are involved. A holds the rear ruler, B holds the front ruler, and C controls the observation instrument. All three observers have software systems installed on their mobile phones, and they can communicate with each other through the software system. A, B, and C start from the subway tunnel entrance at the same time. After arriving at the i-th leveling monitoring point, A holds up the rear ruler and scans the QR code of the leveling monitoring point near the leveling monitoring point. The point information is automatically input into the software system. The software system prompts B and C to the position of A, and A's position is used as the rear ruler position. At the same time, the software system prompts B and C to continue forward M / 2 steps. At this time, C sets up the observation instrument, and B continues to move forward M / 2 steps. After arriving, the front ruler is erected at the same position, and B's position is used as the front ruler position. After the three people arrive at their respective positions, they all report to the software system for contact and adjustment; Among them: In order to ensure that the front and rear sight distances are equal at the observation instrument at M / 2 to meet the subway tunnel settlement monitoring standards and requirements, C immediately carried out the settlement monitoring task, read the data of the rear and front scales to obtain the elevation data corresponding to the station location, and then stored the data in the software system and operated the display to complete the measurement station. The observation of this measurement station is completed; The software system then prompts A, who is the rear ruler, to become the front ruler in the next monitoring task, and B remains at the original position and automatically becomes the rear ruler in the next monitoring task. The software system then prompts A and C to carry the observation instrument to B's position first and start from B's position, then walk forward M / 2 steps. The software system prompts C to set up the observation instrument at his position, and A continues to walk forward M / 2 steps and then erects the front ruler at his position. After the three people arrive at their respective positions, they still report to the software system that they have arrived at their respective positions. C then performs the settlement monitoring task, reads the data of the rear ruler and the front ruler to obtain the elevation data corresponding to the station location, and after the reading is completed, the data is stored in the software system and the operation display station is completed. The monitoring is carried out alternately until the Nth station, and communication is carried out in the software system at any time. Finally, when the three people are about to reach the i+1th leveling monitoring point, they scan the QR code of the leveling monitoring point to obtain the point information of the leveling monitoring point and compare whether it is the i+1th leveling monitoring point. If correct, they erect the level ruler normally at the leveling monitoring point to perform the settlement monitoring task. If not, they make corrections according to the actual situation to reach the correct position.

7. The method for assisting on-site point finding in subway tunnel settlement monitoring according to claim 6, characterized in that: The observation instruments used by observers when performing settlement monitoring tasks are placed without obstruction and maintain line of sight. The observation instruments used comply with the standards and requirements for subway tunnel settlement monitoring.

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