Tunnel vault settlement monitoring device and system

Abstract

The utility model discloses a tunnel vault settlement monitoring device and system, and the system comprises a plurality of monitoring devices which are sequentially arranged at intervals along the extension direction of a tunnel. The monitoring device comprises a bidirectional laser range finder and two reflecting plates. The bidirectional laser range finder is hoisted at a monitoring point of a tunnel vault, and the two laser range finding probes respectively point to the reflecting plates at two reference points of the tunnel ground. The two laser ranging probes emit laser beams to the two reflecting plates respectively. And under the action of the reflecting plate, laser emitted by the laser ranging probe is reflected back to the laser ranging probe and is received by an induction end arranged on the laser ranging probe, so that the distance between the laser ranging probe and the reflecting plate, namely the distance between a monitoring point and a reference point, is measured. The distance between the monitoring point and the tunnel ground can be accurately calculated by combining the distance between the monitoring point and the reference point measured by the two laser ranging probes, and then the settlement amount of the vault at the monitoring point is determined.

Description

Technical Field

[0001] The utility model relates to the technical field of elevation measurement, in particular to a tunnel vault settlement monitoring device and system. Background Art

[0002] For the measurement of tunnel vault settlement, the current common practice is to set up monitoring points at the tunnel vault and arch waist, use the total station to collect the coordinate data of the monitoring points, calculate the elevation of the monitoring points at the vault and the horizontal distance between the monitoring points at the arch waist, and compare and analyze the differences between the current data and the first data to obtain the vault settlement.

[0003] This method has certain requirements on the degree of standardization of data collection technicians' operation, data collection operation surface, on-site lighting and other objective conditions. The specification requires fixed personnel in the data collection link of monitoring, in order to minimize the impact of human operation on the accuracy of monitoring data. However, it is difficult to ensure that the same technician collects data at a fixed time in long-term and high-frequency monitoring work.

[0004] To this end, the patent with announcement number CN206223144U discloses a monitoring device for tunnel vault settlement based on ultrasonic rangefinders, which automatically measures the monitoring points at the top of the tunnel through ultrasonic rangefinders set on the inner walls of both sides of the tunnel, thereby realizing the automatic measurement of tunnel vault settlement. However, the measurement accuracy of the ultrasonic rangefinder is low, and when the ultrasonic rangefinders on both sides measure at the same time, there may be interference between them, further reducing the measurement accuracy. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model proposes a tunnel vault settlement monitoring device and system, which can ensure the measurement accuracy of tunnel settlement. The specific technical solution is as follows:

[0006] In a first aspect, a tunnel vault settlement monitoring device is provided. In a first implementable manner of the first aspect, the device comprises:

[0007] Two reflective plates are arranged at two reference points at the bottom of the tunnel in a sequentially spaced manner along the extension direction of the tunnel;

[0008] The bidirectional laser rangefinder is arranged at a monitoring point between the two reflecting plates and comprises two laser rangefinder probes, wherein the two laser rangefinder probes are respectively matched with the two reflecting plates.

[0009] In combination with the first implementable manner of the first aspect, in a second implementable manner of the first aspect, the bidirectional laser rangefinder includes a mounting base, and the two laser rangefinder probes are arranged on both sides of the mounting base and are rotatably connected to the mounting base.

[0010] In combination with the second implementable manner of the first aspect, in a third implementable manner of the first aspect, the mounting base includes:

[0011] A fixed plate, fixed by bolts at the monitoring point located at the top of the vault;

[0012] A base, located below the fixed plate and fixedly connected to the fixed plate via a connecting rod;

[0013] Two universal joints are respectively arranged on both sides of the base, with one end fixedly connected to the base and the other end fixedly connected to the laser ranging probe.

[0014] In combination with the first implementable manner of the first aspect, in a fourth implementable manner of the first aspect, the bidirectional laser rangefinder is provided with a trigger switch, and the trigger switch is configured to trigger the bidirectional laser rangefinder to perform distance measurement according to a set detection time.

[0015] In the second aspect, a tunnel vault settlement monitoring system is provided. In a first implementable manner of the second aspect, the system comprises: a plurality of tunnel vault settlement monitoring devices as described in any of the above, all of the bidirectional laser rangefinders are respectively arranged at monitoring points arranged in sequence along the extension direction of the tunnel, and the two reflective plates matched with the bidirectional laser rangefinders are respectively arranged at reference points on both sides of the bidirectional laser rangefinders.

[0016] In combination with the first implementable manner of the second aspect, in a second implementable manner of the second aspect, the reflective plate is provided with two reflective inclined surfaces, and the two reflective inclined surfaces are respectively adapted to the laser ranging probes of two adjacent bidirectional laser rangefinders.

[0017] Beneficial effect: The tunnel vault settlement monitoring device and system of the utility model can ensure the measurement accuracy by setting up a bidirectional laser rangefinder, and the two laser ranging probes of the bidirectional laser rangefinder measure in different directions respectively, and will not interfere with each other, thereby further ensuring the measurement accuracy of tunnel settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A schematic diagram of the structure of a tunnel vault settlement monitoring device provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of a bidirectional laser rangefinder provided in one embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of a tunnel vault settlement monitoring system provided by an embodiment of the utility model;

[0022] Reference numerals:

[0023] 1-reflection plate, 2-bidirectional laser rangefinder, 3-laser rangefinder probe, 4-mounting base, 5-fixed plate, 6-base, 7-connecting rod, 8-universal joint. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0025] Embodiment 1

[0026] like Figure 1 The structural schematic diagram of the tunnel vault settlement monitoring device shown in FIG. 1 includes:

[0027] Two reflective plates 1 are arranged at two reference points at the bottom of the tunnel in a sequentially spaced manner along the tunnel extension direction;

[0028] The bidirectional laser rangefinder 2 is arranged at a monitoring point between the two reflecting plates 1 and comprises two laser rangefinder probes 3 , and the two laser rangefinder probes 3 are respectively matched with the two reflecting plates 1 .

[0029] Specifically, the monitoring device includes a bidirectional laser rangefinder 2 and two reflectors 1. The bidirectional laser rangefinder 2 can be hoisted at a monitoring point located on the tunnel vault, and the two laser rangefinder probes 3 are respectively pointed to the reflectors 1 at two reference points on the tunnel ground. The two laser rangefinder probes 3 can respectively emit laser beams to the two reflectors 1 located at different positions. Under the action of the reflector 1, the laser emitted by the laser rangefinder probe 3 can be reflected back to the laser rangefinder probe 3 and received by the sensing end provided by the laser rangefinder probe 3. The laser rangefinder probe 3 can determine the distance between the laser rangefinder probe 3 and the reflector 1, that is, the distance between the monitoring point and the reference point, according to the time of emitting the laser and the time of receiving the reflected laser. Combined with the distance between the monitoring point and the reference point measured by the two laser rangefinder probes 3, the distance between the monitoring point and the tunnel ground can be accurately calculated, and then the settlement of the vault at the monitoring point can be determined.

[0030] It should be understood that since the dust in the tunnel is generally deposited in the middle or bottom of the tunnel, hoisting the bidirectional laser rangefinder 2 at the top of the tunnel can prevent a large amount of dust from being deposited on the laser ranging probe 3 and affecting the ranging accuracy of the laser ranging probe 3.

[0031] It should also be understood that in this embodiment, a mounting hole can be opened on the tunnel floor, the reflector 1 can be fixedly installed in the mounting hole, and a transparent protective cover is used to cover the opening of the mounting hole to prevent dust from entering the mounting hole and being deposited on the reflector 1, affecting the laser ranging. At the same time, it can avoid the formation of depressions on the tunnel floor that affect normal driving. The protective cover can be made of tempered glass, and its top surface can be flush with the tunnel floor or slightly lower than the tunnel floor.

[0032] In this embodiment, optionally, Figure 2 As shown, the bidirectional laser rangefinder 2 includes a mounting base 4 , and the two laser rangefinder probes 3 are arranged on both sides of the mounting base 4 and are rotatably connected to the mounting base 4 .

[0033] Specifically, the bidirectional laser rangefinder 2 includes a mounting base 4 and two laser rangefinder probes 3. The two laser rangefinder probes 3 are respectively arranged on both sides of the mounting base 4 and point to two different directions to avoid mutual interference. The laser rangefinder probe 3 can be rotatably connected to the mounting base 4 to adjust the ranging direction of the laser rangefinder probe 3 so that the laser beam emitted by the laser rangefinder probe 3 can be reflected back to the laser rangefinder probe 3 under the action of the reflector 1, thereby realizing distance measurement.

[0034] In this embodiment, optionally, the mounting base 4 includes:

[0035] A fixed plate 5 is fixed at a monitoring point located at the top of the vault by bolts;

[0036] A base 6 is located below the fixed plate 5 and is fixedly connected to the fixed plate 5 via a connecting rod 7;

[0037] Two universal joints 8 are respectively arranged on both sides of the base 6 , and one end is fixedly connected to the base 6 , and the other end is fixedly connected to the laser ranging probe 3 .

[0038] Specifically, the mounting base 4 includes a fixed plate 5, a base 6 and two universal joints 8. The fixed plate 5 is provided with a plurality of bolts, which can be fixed to the arch at the monitoring point by bolts. The base 6 is located below the fixed plate 5 and is fixed to the fixed plate 5 by a connecting rod 7. One end of the connecting rod 7 is fixed to the fixed plate 5, and the other end is fixed to the base 6. The two universal joints 8 are respectively fixed to both sides of the base 6 and are respectively connected to the two laser ranging probes 3. The universal joints 8 can be used to arbitrarily adjust the posture of the two laser ranging probes 3 so that the laser beam emitted by the laser ranging probe 3 can be reflected back to the laser ranging probe 3 under the action of the reflector 1, thereby realizing distance measurement.

[0039] Embodiment 2

[0040] The second embodiment is substantially the same as the first embodiment, and the main difference is that the bidirectional laser rangefinder 2 is provided with a trigger switch, and the trigger switch is configured to trigger the bidirectional laser rangefinder 2 to perform distance measurement according to a set detection time.

[0041] Specifically, an existing vehicle driving trajectory monitoring system can be set up in the tunnel, and the driving trajectory of all vehicles in the tunnel can be monitored in real time through the vehicle driving trajectory monitoring system. The time for each vehicle to travel to the reference point corresponding to the monitoring device can be predicted through the corresponding driving trajectory. In this way, combined with the time for all vehicles in the tunnel to travel to the reference point, the monitoring device can be planned to measure the distance during the detection time period when no vehicle travels to the reference point. When the time reaches the planned detection time, the trigger switch can trigger the bidirectional laser rangefinder 2 to measure the distance, thereby preventing the vehicle from blocking the laser beam and ensuring the effectiveness of the laser distance measurement.

[0042] Implementation Three

[0043] like Figure 3 The schematic diagram of the tunnel vault settlement monitoring system shown in the figure comprises: a plurality of the above-mentioned tunnel vault settlement monitoring devices, all of the bidirectional laser rangefinders 2 are respectively arranged at monitoring points arranged in sequence along the extension direction of the tunnel, and the two reflecting plates 1 matched with the bidirectional laser rangefinders 2 are respectively arranged at reference points on both sides of the bidirectional laser rangefinders 2.

[0044] Specifically, the monitoring system includes a plurality of monitoring devices, all of which are arranged in sequence and at intervals along the tunnel extension direction. The settlement of the tunnel vault at different monitoring points can be monitored by each monitoring device.

[0045] In this embodiment, the reflector 1 is optionally provided with two reflective bevels, and the two reflective bevels are respectively adapted to the laser ranging probes 3 of two adjacent bidirectional laser rangefinders 2. Specifically, the reflector 1 can be provided in a triangular pyramid shape, so that the same reference point has two reflective bevels, and the two reflective bevels can respectively cooperate with the laser ranging probes 3 of the two bidirectional laser rangefinders 2 located in front of and behind the reference point where the reflector 1 is located. In this way, the settlement monitoring of two monitoring points can be realized through three reference points, reducing the number of reference points set, and further reducing the number of installation holes.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A tunnel vault settlement monitoring device, characterized in that: include: Two reflective plates are arranged at two reference points at the bottom of the tunnel in a sequentially spaced manner along the tunnel extension direction; The bidirectional laser rangefinder is arranged at a monitoring point between the two reflecting plates and comprises two laser rangefinder probes, wherein the two laser rangefinder probes are respectively matched with the two reflecting plates.

2. The tunnel vault settlement monitoring device according to claim 1, characterized in that: The bidirectional laser rangefinder comprises a mounting base, and the two laser rangefinder probes are arranged on both sides of the mounting base and are rotatably connected to the mounting base.

3. The tunnel vault settlement monitoring device according to claim 2, characterized in that: The mounting base comprises: A fixed plate, fixed by bolts at the monitoring point located at the top of the vault; A base, located below the fixed plate and fixedly connected to the fixed plate via a connecting rod; Two universal joints are respectively arranged on both sides of the base, with one end fixedly connected to the base and the other end fixedly connected to the laser ranging probe.

4. The tunnel vault settlement monitoring device according to claim 1, characterized in that: The bidirectional laser rangefinder is provided with a trigger switch, and the trigger switch is configured to trigger the bidirectional laser rangefinder to perform distance measurement according to a set detection time.

5. A tunnel vault settlement monitoring system, characterized in that: include: A plurality of tunnel vault settlement monitoring devices as described in any one of claims 1 to 4, wherein all the bidirectional laser rangefinders are respectively arranged at monitoring points spaced in sequence along the extension direction of the tunnel, and the two reflecting plates matched with the bidirectional laser rangefinders are respectively arranged at reference points on both sides of the bidirectional laser rangefinders.

6. The tunnel vault settlement monitoring system according to claim 5, characterized in that: The reflective plate is provided with two reflective inclined surfaces, and the two reflective inclined surfaces are respectively matched with the laser distance measuring probes of two adjacent bidirectional laser distance measuring instruments.

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