Settlement monitoring system based on Beidou reference positioning

Abstract

The utility model discloses a settlement monitoring system based on Beidou reference positioning. The settlement monitoring system comprises a Beidou remote displacement measurement module and a fiber bragg grating static leveling measurement module, the fiber bragg grating static leveling module is arranged at a settlement position to be monitored and is used for monitoring settlement; and the Beidou remote displacement measurement module is used for monitoring the real-time displacement of the fiber bragg grating static leveling measurement module. According to the scheme, the differential settlement information of each measuring point in the tunnel can be obtained in real time through the arrangement of the plurality of fiber bragg grating static level gauges, and the differential settlement information of the reference point can be dynamically monitored in real time by using the differential settlement monitoring based on Beidou reference positioning, so that the measurement error caused by the position change of the reference point can be eliminated, and the measurement accuracy is improved. The temperature error is reduced by arranging the heat preservation pipe and filling the anti-freezing solution, the accuracy of differential settlement monitoring is greatly guaranteed, and the tunnel operation safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of settlement monitoring, and particularly relates to a settlement monitoring system based on Beidou reference positioning. Background Art

[0002] During the construction and operation of tunnels, uneven settlement may occur due to various factors such as geological conditions, construction techniques, and material properties. This uneven settlement has a serious impact on the structural safety, service life, and operation safety of the tunnels.

[0003] How to accurately monitor the uneven settlement of tunnels to provide timely basis for maintenance and treatment becomes particularly important. Summary of the Invention

[0004] In order to solve the above technical deficiencies in the prior art, the utility model proposes a settlement monitoring system based on Beidou reference positioning.

[0005] The technical solution for achieving the purpose of the utility model is as follows:

[0006] A settlement monitoring system based on Beidou reference positioning includes a Beidou remote displacement measurement module and a fiber Bragg grating hydrostatic level measurement module;

[0007] The fiber Bragg grating hydrostatic level measurement module is arranged at the place where settlement is to be monitored for monitoring settlement;

[0008] The Beidou remote displacement measurement module is used for monitoring the real-time displacement of the fiber Bragg grating hydrostatic level measurement module.

[0009] Further, the fiber Bragg grating hydrostatic level measurement module includes fiber Bragg grating hydrostatic level gauges, liquid pipes, gas pipes, and fiber optic leads;

[0010] The multiple fiber Bragg grating hydrostatic level gauges are respectively connected through liquid pipes, gas pipes, and fiber optic leads.

[0011] Further, a heat preservation pipe is sleeved outside the liquid pipe and filled with antifreeze.

[0012] Further, the fiber Bragg grating hydrostatic level gauge is fixed by an L-shaped bracket.

[0013] Further, an adjusting screw is arranged between the fiber Bragg grating hydrostatic level gauge and the L-shaped bracket.

[0014] Further, the Beidou remote displacement measurement module includes a bracket and a Beidou remote displacement measurement device;

[0015] The Beidou remote displacement measurement device is arranged on the same vertical line as one of the fiber Bragg grating hydrostatic level gauges.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) Through the layout of multiple fiber Bragg grating static level gauges, the present utility model can obtain the differential settlement information of each measuring point in the tunnel in real time. At the same time, by using the uneven settlement monitoring based on Beidou reference positioning, the measurement errors caused by the change of the reference point position can be eliminated. By setting up heat preservation pipes and filling antifreeze, the temperature error can be reduced, which greatly ensures the accuracy of the uneven settlement monitoring.

[0018] (2) By using the uneven settlement monitoring based on Beidou reference positioning, the present utility model can monitor the uneven settlement information of each measuring point in real time and dynamically. The staff can issue early warnings through this data, which is convenient for the staff to carry out treatment in time and ensures the safe operation of the tunnel.

[0019] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the settlement monitoring system architecture based on Beidou reference positioning in the embodiment of the present utility model.

[0021] Figure 2 It is a schematic diagram of the layout of settlement monitoring points in the case of no intermediate pipe gallery in the embodiment of the present utility model.

[0022] Figure 3 It is a schematic diagram of the layout of settlement monitoring points in the case of having an intermediate pipe gallery in the embodiment of the present utility model. Specific Embodiments

[0023] It is easy to understand that according to the technical solution of the present utility model, without changing the essence of the present utility model, those of ordinary skill in the art can imagine various implementation manners of the present utility model. Therefore, the following specific embodiments and drawings are only illustrative descriptions of the technical solution of the present utility model, and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the present utility model. On the contrary, the purpose of providing these embodiments is to enable those skilled in the art to understand the present utility model more thoroughly. The following describes the preferred embodiments of the present utility model in detail with reference to the drawings, where the drawings form a part of this application and are used together with the embodiments of the present utility model to illustrate the innovative concept of the present invention.

[0024] Embodiment

[0025] Combined with Figure 1 , a settlement monitoring system based on Beidou reference positioning includes a Beidou remote displacement measurement module and a fiber Bragg grating static level measurement module;

[0026] The fiber Bragg grating static level measurement module is set at the settlement to be monitored, and is used to monitor the uneven settlement of the tunnel in real time;

[0027] The Beidou remote displacement measurement module is used to monitor the real-time displacement of the fiber Bragg grating static level measurement module, that is, the dynamic monitoring of the absolute position and vertical displacement of the fiber Bragg grating static level measurement module.

[0028] The fiber Bragg grating static level measurement module includes a fiber Bragg grating static level gauge 3, a liquid pipe 5, a gas pipe 7, and a fiber optic lead 8;

[0029] The multiple fiber Bragg grating static level gauges 3 are respectively connected by a liquid pipe 5, a gas pipe 7, and a fiber optic lead 8.

[0030] In this embodiment, a settlement monitoring reference point and multiple uneven settlement monitoring points are set at the settlement to be monitored, and multiple fiber Bragg grating static level gauges 3 are respectively arranged. Among them, the fiber Bragg grating static level gauge 3 is fixed to the settlement monitoring reference point and the uneven settlement monitoring points through an L-shaped bracket 4. The upper air end of the fiber Bragg grating static level gauge 3 is connected by a gas pipe 7, and the lower liquid end is connected by a liquid pipe 5. The multiple fiber Bragg grating static level gauges 3 are also network-connected through a fiber optic lead 8 for transmitting the data measured by the fiber Bragg grating static level gauge 3;

[0031] In addition, in this embodiment, a heat preservation pipe 6 is sleeved outside the liquid pipe 5 and filled with antifreeze to reduce the temperature error, so as to realize the real-time dynamic monitoring of the uneven settlement amount of each measuring point.

[0032] An adjusting screw 9 is arranged between the fiber Bragg grating static level gauge 3 and the L-shaped bracket 4, which is used for fine-tuning the height of the measuring point and enabling each sensor to be at the same elevation.

[0033] In this embodiment, the fiber Bragg grating static level gauge 3 has a measuring range of 100 mm, a measuring accuracy of 0.1 mm, and a size of φ89*273 mm. In areas prone to uneven settlement, such as areas with poor geological soils such as soft clay under the tunnel, and in areas with high requirements for settlement control, such as positions above the subway and under the elevated bridge, multiple uneven settlement monitoring points can be arranged on the inner wall of the tunnel side wall or the side wall of the intermediate pipe gallery.

[0034] The Beidou remote displacement measurement module includes a Beidou remote displacement measurement device 1 and a bracket 2;

[0035] The Beidou remote displacement measurement device 1 and one of the fiber Bragg grating static level 3 are arranged on the same vertical line. In this embodiment, the Beidou remote displacement measurement device 1 and the fiber Bragg grating static level 3 arranged at the settlement monitoring reference point are arranged on the same vertical line. The Beidou remote displacement measurement system and the fiber Bragg grating static level are arranged at the reference point for real-time monitoring of the reference point position information and settlement amount and can eliminate the uneven settlement monitoring error caused by the change of the reference point. Generally speaking, the reference point is set on the side wall of the structure where the underlying stratum is relatively stable, there is no obvious disturbance above the structure (such as crossing roads, rivers, etc.), and there is no sudden change in the structural form.

[0036] In this embodiment, the Beidou remote displacement measuring device 1 can select the Beidou remote displacement measuring system of model JMBD-1050, the integrated Beidou displacement stack of model MR3, the Beidou displacement monitoring integrated machine of model E-8s or the Beidou-3 integrated machine of model HGYT-02. The Beidou remote displacement measuring device 1 selected in this embodiment has a resolution of 1mm, an operating temperature of -40℃~85℃, a mechanical size of 195mm in diameter and 95mm in height. The Beidou remote displacement measurement module is generally arranged in an area where the underlying soil is good and relatively less prone to settlement. It can be arranged on the inner wall of the tunnel side wall or the side wall of the middle pipe gallery and fixed with a bracket 2. In this embodiment, an "L"-shaped bracket is used for fixing. One side of the "L"-shaped bracket is close to the wall and fixed by bolts, and the Beidou remote displacement measurement system is placed on the other side and fixed with a cable tie.

[0037] When the system is working, real-time settlement monitoring of the monitoring point can be achieved through the uneven settlement data collected by the fiber grating static level 3 of each measuring point and the dynamic data of the absolute position and vertical displacement of the fiber grating static level 3 of the reference point measured by the Beidou remote displacement measurement device 1. The measurement error caused by the change of the reference point position can be eliminated, and the temperature error can be reduced by setting an insulation tube and filling antifreeze liquid, thereby greatly ensuring the accuracy of uneven settlement monitoring.

[0038] like Figure 2 and Figure 3 As shown in the figure, it is a schematic diagram of the layout of settlement monitoring points of the settlement monitoring system based on Beidou reference positioning in this scheme with or without an intermediate pipeline corridor. The system can be deployed according to the actual situation on site to achieve efficient and accurate real-time monitoring of settlement.

[0039] The above embodiments illustrate and describe the basic principles and main features of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only explains the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A settlement monitoring system based on Beidou reference positioning, characterized in that: Including Beidou remote displacement measurement module and fiber grating static level measurement module; The fiber Bragg grating static level measurement module is arranged at the settlement to be monitored, and is used to monitor the settlement; The Beidou remote displacement measurement module is used to monitor the real-time displacement of the fiber grating static level measurement module.

2. The subsidence monitoring system based on Beidou reference positioning according to claim 1 is characterized in that: The fiber Bragg grating static level measurement module comprises a fiber Bragg grating static level (3), a liquid pipe (5), a ventilation pipe (7), and an optical fiber lead (8); The multiple fiber grating static level instruments (3) are connected respectively via a liquid pipe (5), a ventilation pipe (7), and an optical fiber lead wire (8).

3. The subsidence monitoring system based on Beidou reference positioning according to claim 2 is characterized in that: The liquid passage pipe (5) is sheathed with a heat preservation pipe (6) on the outside and filled with antifreeze liquid.

4. The subsidence monitoring system based on Beidou reference positioning according to claim 2 is characterized in that: The fiber grating static level (3) is fixed by an L-shaped bracket (4).

5. The settlement monitoring system based on Beidou reference positioning according to claim 4 is characterized in that: An adjusting screw (9) is arranged between the fiber optic Bragg grating static level (3) and the L-shaped bracket (4).

6. The settlement monitoring system based on Beidou reference positioning according to claim 2 is characterized in that: The Beidou remote displacement measurement module comprises a Beidou remote displacement measurement device (1) and a bracket (2); The Beidou remote displacement measurement device (1) and one of the fiber optic Bragg grating static levelers (3) are arranged on the same vertical line.

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