Early warning system for stratum deformation in parallel stacking construction process of overcrossing existing pipeline

Abstract

The invention belongs to the technical field of ground plane laser measurement, and particularly relates to a stratum deformation early warning system in the parallel stacking construction process of an overpass existing pipeline, which comprises an acquisition module, a cloud processing center and an early warning response module, the collection module completes data collection through a laser monitoring device arranged at the construction position of the existing pipeline parallel stacking construction tunnel, and the collection module sends collected monitoring data to the cloud processing center; the cloud processing center calculates the feedback monitoring data to judge whether formation deformation occurs, if the formation deformation occurs, whether an early warning threshold value is reached is judged, and if the early warning threshold value is reached, an early warning notification is sent to an early warning response module; and after the early warning prompt module obtains the early warning notification, emergency early warning is carried out through the cloud processing center and the laser monitoring device. Whether the stratum deforms or not is measured through laser, the measurement result is accurate, and early warning prompt is safer.

Description

Technical Field

[0001] The invention belongs to the technical field of ground plane laser measurement, and in particular relates to a stratum deformation early warning system during parallel stacking construction of an existing pipeline. Background Art

[0002] During the construction of subway rail transit, especially during the parallel overlapping construction across the existing pipeline, it is necessary to monitor the deformation of the stratum in real time. When the stratum deformation occurs, it is possible to issue an early warning in time to ensure the safety of construction. A stratum deformation early warning system is required. For example, a Chinese patent with patent number CN108151699A discloses a double-hole tunnel stratum deformation prediction method, which includes the following steps: differential processing of the excavated tunnel to obtain multiple micro-excavation units, and based on the random medium theory, calculating the surface settlement value caused by the micro-excavation unit according to the buried depth of the micro-excavation unit; determining the gap parameter of the excavated tunnel based on the finite element method, and integrating all the micro-excavation units contained in the excavated tunnel in combination with the gap parameter to obtain the surface settlement value caused by the excavation of the tunnel; summing up the surface settlement values ​​caused by all the excavated tunnels to obtain the surface settlement value caused by the excavation of the double-hole tunnel. In actual operation, the existing technology cannot accurately collect the specific data of each micro-excavation unit, and the final surface settlement value data has poor accuracy. For this reason, we propose a stratum deformation early warning system during the parallel overlapping construction across the existing pipeline. Summary of the invention

[0003] The purpose of the present invention is to provide a stratum deformation early warning system during the parallel stacking construction process across the existing pipeline. By setting up the stratum deformation early warning system, it is possible to monitor in real time whether stratum deformation occurs during the parallel stacking construction process across the existing pipeline. By using a laser monitoring device for monitoring, the monitoring result is made more accurate to ensure the safety of the construction. In addition, by using a cloud processing center for cloud computing and completing data processing, the data calculation rate is greatly improved, and the data processing accuracy is further enhanced. At the same time, when stratum deformation occurs, an early warning response can be made quickly to further ensure the safety of the construction.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A stratum deformation early warning system during parallel stacking construction over an existing pipeline includes a collection module, a cloud processing center, and an early warning response module.

[0006] The acquisition module completes data acquisition through a laser monitoring device set up at the construction site of the existing pipeline parallel stacking construction tunnel, and the acquisition module sends the collected monitoring data to the cloud processing center;

[0007] The cloud processing center calculates the feedback monitoring data to determine whether formation deformation occurs. If formation deformation occurs, it determines whether the warning threshold is reached. If the warning threshold is reached, a warning notification is sent to the warning response module.

[0008] After the early warning prompt module obtains the early warning notification, it simultaneously issues an emergency warning through the cloud processing center and the laser monitoring device.

[0009] Preferably, the laser monitoring device includes several groups of surface monitoring components and several groups of tunnel internal monitoring components. The surface monitoring components are arranged on the ground surface of the existing parallel pipeline stacking construction tunnel, and the tunnel internal monitoring components are arranged inside the existing parallel pipeline stacking construction tunnel.

[0010] Preferably, the surface monitoring assembly comprises a first rod and a second rod arranged on the ground surface of the existing pipeline parallel stacking construction tunnel, a first laser rangefinder is obliquely arranged on the first rod, and the acute angle between the first laser rangefinder and the vertical perpendicular line is α 1， The height of the second rod is greater than that of the first rod. A first sampling plate is obliquely arranged on the second rod. The acute angle between the first sampling plate and the vertical line is β 1， The first laser rangefinder measures the distance between the first sampling plates in real time.

[0011] Preferably, the tunnel internal monitoring component includes a third rod and a fourth rod, the upper end of the third rod is provided with an inclined second laser rangefinder and a vertically upward third laser rangefinder, the fourth rod is provided with an inclined second sampling plate, and a horizontally placed third sampling plate is installed on the top of the tunnel, the angle between the second laser rangefinder and the vertical perpendicular is α2, the acute angle between the second sampling plate and the vertical perpendicular is β2, the second laser rangefinder is used to measure the distance between the second sampling plate, and the third laser rangefinder 8 is used to measure the distance between the third sampling plate.

[0012] Preferably, the laser monitoring device further comprises an early warning horn installed on the upper part of the first rod and the upper part of the third rod.

[0013] Preferably, the monitoring data includes the real-time indication of the first laser rangefinder, the real-time indication of the second laser rangefinder and the real-time indication of the third laser rangefinder.

[0014] Preferably, wireless communication modules are installed on the upper portion of the first rod and the upper portion of the third rod.

[0015] Preferably, the cloud processing center performs cloud computing on the real-time indications of the first laser rangefinder, the second laser rangefinder and the third laser rangefinder, constructs a mathematical model of soil layer settlement through Lagrange interpolation, and outputs the deformation degree of the maximum deformation point of the soil layer, and then determines whether the warning threshold is reached based on the deformation degree of the maximum deformation point.

[0016] Preferably, after the early warning prompt module obtains the early warning notification, it simultaneously sends an emergency warning to the construction supervision platform through the cloud processing center and issues an emergency warning through the early warning speaker.

[0017] Preferably, the cloud processing center is based on a network computing model, completes data computing and storage through virtualization technology, and provides data resources to users.

[0018] The technical effects achieved by the present invention are:

[0019] In the present invention, by setting up a stratum deformation early warning system, it is possible to monitor in real time whether stratum deformation occurs during the parallel stacking construction process across the existing pipeline. By using a laser monitoring device for monitoring, the monitoring result is made more accurate to ensure the safety of the construction. Moreover, by using a cloud processing center for cloud computing and completing data processing, the data calculation rate is greatly improved, and the data processing accuracy is further enhanced. At the same time, when stratum deformation occurs, an early warning response can be made quickly to further ensure the safety of the construction.

[0020] In the present invention, the initial acquisition point of the first laser rangefinder 3 is point O, and the line segment OP is the initial measurement length L1=OP of the first laser rangefinder 3. When stratum deformation occurs, since the first rod 1 is installed in the middle part just above the tunnel, at this time, the first rod 1 sinks with the stratum, and the sinking height of the first rod 1 carrying the first laser rangefinder 3 is set to h1=OO1. At this time, the first laser rangefinder 3 sinks from the initial acquisition point O to point O1. At this time, the first laser rangefinder 3 measures the distance L2 from the first sampling plate 4 again, as shown in the figure, L2=O1P1; the straight line MO1 is the perpendicular line through point O, the straight line PN is the perpendicular line through point P, and the intersection of the straight line PN and the line segment O1P1 is point T. Since the acute angle between the first laser rangefinder 3 and the vertical perpendicular line is α1, ∠P1TP=∠OO1T=α1, and since the acute angle between the first sampling plate 4 and the vertical perpendicular line is β 1， Therefore ∠P1PT=β 1，Line segment TO1=L1=OP, h1=OO1=PT, therefore in triangle PP1T, PT / sin∠PP1T=P1T / sin∠P1PT; deduction yields h1 / sin(π-α1-β1)=(L2-L1) / sinβ1; h1={sin(π-α1-β1)(L2-L1)} / sinβ1; in summary, by setting up a simple laser ranging device, real-time monitoring of whether the stratum is deformed can be completed. Due to the high accuracy of the laser rangefinder, the accuracy of the device is further improved when measuring whether the stratum is deformed, and the cost of the device is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a system block diagram of a stratum deformation early warning system in a parallel stacking construction process of the present invention that crosses over an existing pipeline;

[0022] Figure 2 It is an operation flow chart of a stratum deformation early warning system in a parallel stacking construction process of the present invention that crosses over an existing pipeline;

[0023] Figure 3 It is a front view of a surface monitoring component in a stratum deformation early warning system in a parallel stacking construction process over an existing pipeline according to the present invention;

[0024] Figure 4 It is a schematic diagram of the operation of the surface monitoring component in the ground deformation early warning system during the parallel stacking construction process of the present invention that crosses over the existing pipeline;

[0025] Figure 5 It is a schematic diagram of the overall structure of the second rod in a stratum deformation early warning system in a parallel stacking construction process of the present invention that crosses over an existing pipeline;

[0026] Figure 6 It is a schematic diagram of the overall structure of the first rod in a stratum deformation early warning system in a parallel stacking construction process of the present invention that crosses over an existing pipeline;

[0027] Figure 7 It is a front view of a tunnel internal monitoring component in a ground deformation early warning system during parallel stacking construction over an existing pipeline according to the present invention;

[0028] Figure 8 It is a schematic diagram of the operation of the tunnel internal monitoring component in the stratum deformation early warning system during the parallel stacking construction process of the present invention over the existing pipeline;

[0029] Fig. 9 The present invention Figure 8 Enlarged view of point A in the middle.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. First pole; 2. Second pole; 3. First laser rangefinder; 4. First sampling plate; 5. Third pole; 6. Fourth pole; 7. Second laser rangefinder; 8. Third laser rangefinder; 9. Second sampling plate; 10. Third sampling plate; 11. Early warning horn. DETAILED DESCRIPTION

[0032] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0033] like Figure 1 As shown, a stratum deformation early warning system during parallel stacking construction over an existing pipeline includes a collection module, a cloud processing center, and an early warning response module.

[0034] The acquisition module completes data acquisition through a laser monitoring device installed at the construction site of the existing pipeline parallel stacking construction tunnel. The acquisition module sends the collected monitoring data to the cloud processing center;

[0035] The cloud processing center calculates the feedback monitoring data to determine whether the formation deformation occurs. If the formation deformation occurs, it determines whether the warning threshold is reached. If the warning threshold is reached, a warning notification is sent to the warning response module.

[0036] After the early warning prompt module receives the early warning notification, it will issue an emergency warning through the cloud processing center and the laser monitoring device at the same time.

[0037] like Figure 2 As shown, in the present invention, by setting up a stratum deformation early warning system, it is possible to monitor in real time whether stratum deformation occurs during the parallel stacking construction across the existing pipeline. By using a laser monitoring device for monitoring, the monitoring result is made more accurate to ensure the safety of the construction. Moreover, by using a cloud processing center for cloud computing and completing data processing, the data calculation rate is greatly improved, and the data processing accuracy is further enhanced. At the same time, when stratum deformation occurs, an early warning response can be made quickly to further ensure the safety of the construction.

[0038] The laser monitoring device includes several groups of surface monitoring components and several groups of tunnel internal monitoring components. The surface monitoring components are arranged on the ground surface of the existing parallel pipeline stacking construction tunnel, and the tunnel internal monitoring components are arranged inside the existing parallel pipeline stacking construction tunnel.

[0039] In the present invention, a laser monitoring component is set up, and the laser monitoring component disclosed in this embodiment includes two parts, one part is set on the ground surface of the existing parallel pipeline stacking construction tunnel, and the surface monitoring component of this part monitors in real time whether the ground surface is sinking, and the other part is set inside the existing parallel pipeline stacking construction tunnel, so as to complete the monitoring of whether the soil layer inside the tunnel is deformed and whether it sinks. In summary, the present invention can not only monitor whether the ground deformation and ground sinking occur on the surface, but also monitor whether the ground inside the tunnel is deformed or sinking.

[0040] The surface monitoring assembly includes a first pole 1 and a second pole 2 arranged on the ground surface of the existing pipeline parallel stacking construction tunnel. A first laser rangefinder 3 is inclined on the first pole 1. The acute angle between the first laser rangefinder 3 and the vertical perpendicular line is α 1， The height of the second rod 2 is greater than that of the first rod 1. A first sampling plate 4 is obliquely arranged on the second rod 2. The acute angle between the first sampling plate 4 and the vertical line is β 1， The first laser rangefinder 3 measures the distance between the first sampling plate 4 in real time.

[0041] In actual use, Figure 3-6 As shown, the initial acquisition point of the first laser rangefinder 3 is point O, and the line segment OP is the initial measurement length L1=OP of the first laser rangefinder 3. When stratum deformation occurs, since the first rod 1 is installed in the middle of the tunnel directly above, the first rod 1 sinks with the stratum, and the sinking height of the first rod 1 carrying the first laser rangefinder 3 is set to h1=OO1. At this time, the first laser rangefinder 3 sinks from the initial acquisition point O to point O1. At this time, the first laser rangefinder 3 measures the distance L2 from the first sampling plate 4 again, as shown in the figure, L2=O1P1; the straight line MO1 is the perpendicular line through point O, the straight line PN is the perpendicular line through point P, and the intersection of the straight line PN and the line segment O1P1 is point T. Since the acute angle between the first laser rangefinder 3 and the vertical perpendicular line is α1, ∠P1TP=∠OO1T=α1, and since the acute angle between the first sampling plate 4 and the vertical perpendicular line is β 1， Therefore ∠P1PT=β 1， Line segment TO1=L1=OP, h1=OO1=PT, therefore in triangle PP1T, PT / sin∠PP1T=P1T / sin∠P1PT; by deduction, we can obtain h1 / sin(π-α1-β1)=(L2-L1) / sinβ1; h1={sin(π-α1-β1)(L2-L1)} / sinβ1.

[0042] In summary, by setting up a simple laser ranging device, real-time monitoring of whether the stratum is deformed can be completed. Since the laser rangefinder has high accuracy, the accuracy of this device is further improved when measuring whether the stratum is deformed, and the cost of this device is lower.

[0043] The tunnel internal monitoring component includes a third rod 5 and a fourth rod 6. An inclined second laser rangefinder 7 and a vertically upward third laser rangefinder 8 are provided on the upper end of the third rod 5. An inclined second sampling plate 9 is provided on the fourth rod 6. A horizontally placed third sampling plate 10 is installed on the top of the tunnel. The angle between the second laser rangefinder 7 and the vertical perpendicular is α2, and the acute angle between the second sampling plate 9 and the vertical perpendicular is β2. The second laser rangefinder 7 is used to measure the distance from the second sampling plate 9, and the third laser rangefinder 8 is used to measure the distance from the third sampling plate 10.

[0044] In actual use, Figures 7 to 9 As shown, when the top wall of the tunnel inner wall has ground subsidence deformation, the third laser rangefinder 8 is directly used to measure the distance between the third sampling plates 10 for real-time measurement. For example, in the initial state, the third laser rangefinder 8 is used to measure the distance between the third sampling plates 10 as L3. When the top wall has ground subsidence deformation, the third laser rangefinder 8 is used to measure the distance between the third sampling plates 10 as L4. Then, the height h3 of the top wall of the tunnel where the ground subsidence deformation occurs is L3-L4.

[0045] However, in actual use, the bottom wall of the tunnel may also experience ground subsidence and deformation. At this time, the third laser rangefinder 8 is used to measure the distance between the third sampling plates 10. The distance L4 increases, and the height of the ground subsidence and deformation of the bottom wall of the tunnel is h3=L4-L3. At this time, the same calculation method as the first laser rangefinder 3 is used. The second laser rangefinder 7 measures the distance between the second sampling plates 9 in the initial state as L5. After the ground subsidence and deformation of the internal bottom wall occurs, the second laser rangefinder 7 measures the distance between the second sampling plates 9 in the initial state as L6. Using the same algorithm as above, it is deduced that the bottom wall of the tunnel may also experience ground subsidence and deformation at a height of h2={sin(π-α2-β2)(L6-L5)} / sinβ2. At this time, if h2=h3, it means that only the bottom wall of the tunnel has ground deformation and collapse. Otherwise, it means that both the top wall and the bottom wall of the tunnel have ground deformation and collapse.

[0046] The laser monitoring device also includes an early warning horn 11 installed on the upper part of the first pole 1 and the upper part of the third pole 5; a wireless communication module is installed on the upper part of the first pole 1 and the upper part of the third pole 5; it should be supplemented that a wireless communication module is also installed on the upper part of the first pole 1 and the upper part of the third pole 5, and the monitoring data is sent to the cloud processing center through the wireless communication module, and it is also used to receive signals from the cloud processing center to control the early warning horn 11 to issue an emergency warning prompt.

[0047] The monitoring data includes the real-time indications of the first laser rangefinder 3, the real-time indications of the second laser rangefinder 7 and the real-time indications of the third laser rangefinder 8; the cloud processing center performs cloud computing on the real-time indications of the first laser rangefinder 3, the real-time indications of the second laser rangefinder 7 and the real-time indications of the third laser rangefinder 8, and constructs a mathematical model of soil layer settlement through Lagrange interpolation, and outputs the deformation degree of the maximum deformation point of the soil layer, and judges whether the warning threshold is reached according to the deformation degree of the maximum deformation point; after the early warning prompt module obtains the early warning notification, it sends an emergency warning to the construction supervision platform through the cloud processing center, and sends an emergency warning through the early warning speaker 11.

[0048] In actual use, the wireless communication module sends the real-time indications of the first laser rangefinder 3, the second laser rangefinder 7 and the third laser rangefinder 8 to the cloud processing center. The cloud processing center completes the calculation through the above algorithm to determine whether the stratum deformation and subsidence occur, and sets the warning threshold to 15mm. When the stratum deformation and subsidence exceed 15mm, the early warning prompt module obtains the early warning notification and sends an emergency warning to the construction supervision platform through the cloud processing center, and sends an emergency warning through the early warning speaker 11.

[0049] It should be noted that the present invention sets a plurality of laser monitoring devices at the same cross-section of the entire tunnel, each laser monitoring device is in place at a sampling point, and finally obtains data of multiple sampling points of the same cross-section, and completes Lagrangian interpolation of the sampling points to complete mathematical modeling, so as to clearly and intuitively check whether deformation and subsidence occur in the tunnel stratum.

[0050] The cloud processing center is based on a network computing model. It uses virtualization technology to complete data computing and storage and provide data resources to users.

[0051] like Figure 1-9 As shown, the working principle of the present invention is: firstly, multiple laser monitoring devices are set, the surface monitoring component is set on the ground surface of the existing pipeline parallel stacking construction tunnel, and the tunnel internal monitoring component is set inside the existing pipeline parallel stacking construction tunnel; then the acquisition module completes data acquisition through the laser monitoring device set at the construction site of the existing pipeline parallel stacking construction tunnel, and the collected data includes the real-time indication of the first laser rangefinder 3, the real-time indication of the second laser rangefinder 7 and the real-time indication of the third laser rangefinder 8. The acquisition module sends the collected monitoring data to the cloud processing center; the cloud processing center completes the data calculation, and the specific calculation process is as follows: Figure 4As shown, the initial acquisition point of the first laser rangefinder 3 is point O, and the line segment OP is the initial measurement length L1=OP of the first laser rangefinder 3. When stratum deformation occurs, since the first rod 1 is installed in the middle of the tunnel directly above, the first rod 1 sinks with the stratum, and the sinking height of the first rod 1 carrying the first laser rangefinder 3 is set to h1=OO1. At this time, the first laser rangefinder 3 sinks from the initial acquisition point O to point O1. At this time, the first laser rangefinder 3 measures the distance L2 from the first sampling plate 4 again, as shown in the figure, L2=O1P1; the straight line MO1 is the perpendicular line through point O, the straight line PN is the perpendicular line through point P, and the intersection of the straight line PN and the line segment O1P1 is point T. Since the acute angle between the first laser rangefinder 3 and the vertical perpendicular line is α1, ∠P1TP=∠OO1T=α1, and since the acute angle between the first sampling plate 4 and the vertical perpendicular line is β 1， Therefore ∠P1PT=β 1， Line segment TO1=L1=OP, h1=OO1=PT, so in triangle PP1T, PT / sin∠PP1T=P1T / sin∠P1PT; it can be deduced that h1 / sin(π-α1-β1)=(L2-L1) / sinβ1; h1={sin(π-α1-β1)(L2-L1)} / sinβ1; if the bottom wall of the tunnel also sinks and deforms, the third laser rangefinder 8 is used to measure the distance between the third sampling plate 10. The distance L4 increases, and the height of the bottom wall of the tunnel where the ground sinks and deforms is h3=L4-L3; at this time, the same calculation method as the first laser rangefinder 3 is used. The second laser rangefinder 7 measures the distance between the second sampling plate 9 in the initial state as L5. After the bottom wall of the tunnel sinks and deforms, the second laser rangefinder The distance between the distance measured by the rangefinder 7 and the second sampling plate 9 in the initial state is L6. Using the same algorithm as above, it is deduced that at this time, the bottom wall of the tunnel will also have a stratum subsidence deformation height h2={sin(π-α2-β2)(L6-L5)} / sinβ2; if h2=h3 at this time, it means that only the bottom wall of the tunnel has stratum deformation and collapse, otherwise it means that both the top wall and the bottom wall of the tunnel have stratum deformation and collapse; finally, the monitoring of whether the tunnel stratum has deformation and subsidence is completed. The cloud processing center completes the calculation through the above algorithm to determine whether the stratum deformation and subsidence occurs, and sets the warning threshold to 15mm. When the stratum deformation and subsidence exceeds 15mm, the early warning prompt module obtains the early warning notification, and at the same time sends an emergency warning to the construction supervision platform through the cloud processing center, and at the same time issues an emergency warning through the early warning speaker 11.

[0052] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A stratum deformation early warning system during parallel stacking construction over an existing pipeline, characterized by: Including collection module, cloud processing center and early warning response module, The acquisition module completes data acquisition through a laser monitoring device set up at the construction site of the existing pipeline parallel stacking construction tunnel, and the acquisition module sends the collected monitoring data to the cloud processing center; The cloud processing center calculates the feedback monitoring data to determine whether formation deformation occurs. If formation deformation occurs, it determines whether the warning threshold is reached. If the warning threshold is reached, a warning notification is sent to the warning response module. After the early warning prompt module obtains the early warning notification, it simultaneously issues an emergency warning through the cloud processing center and the laser monitoring device.

2. According to claim 1, a stratum deformation early warning system during parallel stacking construction over an existing pipeline is characterized by: The laser monitoring device includes several groups of surface monitoring components and several groups of tunnel internal monitoring components. The surface monitoring components are arranged on the ground surface of the existing parallel pipeline stacking construction tunnel, and the tunnel internal monitoring components are arranged inside the existing parallel pipeline stacking construction tunnel.

3. According to claim 1, a stratum deformation early warning system during parallel stacking construction over an existing pipeline is characterized by: The surface monitoring assembly comprises a first rod (1) and a second rod (2) arranged on the ground surface of the existing pipeline parallel stacking construction tunnel, a first laser rangefinder (3) is obliquely arranged on the first rod (1), and the acute angle between the first laser rangefinder (3) and the vertical perpendicular line is α 1， The height of the second rod (2) is greater than that of the first rod (1), and a first sampling plate (4) is obliquely provided on the second rod (2), and the acute angle between the first sampling plate (4) and the vertical line is β 1， The first laser distance meter (3) measures the distance between the first sampling plate (4) in real time.

4. The stratum deformation early warning system during the parallel stacking construction process over the existing pipeline according to claim 3 is characterized by: The tunnel internal monitoring assembly comprises a third rod (5) and a fourth rod (6); an inclined second laser rangefinder (7) and a vertically upward third laser rangefinder (8) are provided at the upper end of the third rod (5); an inclined second sampling plate (9) is provided on the fourth rod (6); a horizontally placed third sampling plate (10) is installed on the top of the tunnel; an angle between the second laser rangefinder (7) and a vertical perpendicular line is α2; an acute angle between the second sampling plate (9) and the vertical perpendicular line is β2; the second laser rangefinder (7) is used to measure the distance between the second sampling plate (9); and the third laser rangefinder (8) is used to measure the distance between the third sampling plate (10).

5. The stratum deformation early warning system during the parallel stacking construction process over the existing pipeline according to claim 4 is characterized by: The laser monitoring device further comprises an early warning horn (11) installed on the upper part of the first rod (1) and the upper part of the third rod (5).

6. The ground deformation early warning system during parallel stacking construction over an existing pipeline according to claim 5, characterized in that: The monitoring data includes the real-time indication of the first laser rangefinder (3), the real-time indication of the second laser rangefinder (7) and the real-time indication of the third laser rangefinder (8).

7. The stratum deformation early warning system during parallel stacking construction over an existing pipeline according to claim 6 is characterized by: Wireless communication modules are installed on the upper part of the first rod (1) and the upper part of the third rod (5).

8. The ground deformation early warning system during parallel stacking construction over an existing pipeline according to claim 7, characterized in that: The cloud processing center performs cloud computing on the real-time indication of the first laser rangefinder (3), the real-time indication of the second laser rangefinder (7), and the real-time indication of the third laser rangefinder (8), and constructs a mathematical model of soil layer settlement through Lagrange interpolation, and outputs the deformation degree of the maximum deformation point of the soil layer, and then determines whether the warning threshold is reached based on the deformation degree of the maximum deformation point.

9. The system for early warning of ground deformation during parallel stacking construction over an existing pipeline according to claim 8, characterized in that: After the early warning prompt module obtains the early warning notification, it simultaneously sends an emergency warning to the construction supervision platform through the cloud processing center and simultaneously issues an emergency warning through the early warning speaker (11).

10. The stratum deformation early warning system during parallel stacking construction over an existing pipeline according to claim 9, characterized in that: The cloud processing center is based on a network computing model, completes data computing and storage through virtualization technology, and provides data resources to users.

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