Tunnel floor mudstone settlement monitoring device

Abstract

The utility model provides a kind of tunnel bottom mudstone settlement monitoring device, belong to tunnel construction geology safety monitoring technical field, including moisture content perception array, fiber grating displacement detection mechanism, sound wave detection mechanism, intelligent analysis terminal and early warning display platform;Moisture content perception array is laid on inverted arch layer of tunnel bottom;Fiber grating displacement detection mechanism is embedded in the inside of primary support structure of tunnel bottom;Sound wave detection mechanism is set on the surrounding rock layer of tunnel bottom;Intelligent analysis terminal includes respectively with the data input module of moisture content perception array, fiber grating displacement detection mechanism and sound wave detection mechanism connection, with data analysis comparison module of data input module connection and with early warning information transmission module of data analysis comparison module connection;Early warning display platform is connected with the early warning information transmission module.Utilize the utility model, can solve the problem of early warning lag in the monitoring of tunnel bottom mudstone settlement in prior art, using artificial inspection mode.

Description

Technical Field

[0001] This utility model relates to the field of geological safety monitoring technology in tunnel construction, and more specifically, to a monitoring device for mudstone settlement at the bottom of a tunnel. Background Technology

[0002] During tunnel construction, it is necessary to monitor tunnel settlement to ensure the safety of the geological conditions. Traditional settlement monitoring methods generally involve staff conducting inspections using total stations or hydrostatic levels to detect surface displacement, and manually sampling and measuring changes in the water content of mudstone. Based on experience, periodic early warning assessments are then conducted according to the changes in surface displacement and water content.

[0003] The existing settlement monitoring technologies mentioned above suffer from a problem of delayed early warning because they periodically detect and analyze surface displacement and water content. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a monitoring device for mudstone settlement at the bottom of tunnels, so as to solve the problem of delayed early warning in the prior art.

[0005] The tunnel bottom mudstone settlement monitoring device provided by this utility model includes a water content sensing array, a fiber optic grating displacement detection mechanism, an acoustic wave detection mechanism, an intelligent analysis terminal, and an early warning display platform; wherein...

[0006] The moisture content sensing array is deployed on the invert arch layer at the bottom of the tunnel;

[0007] The fiber optic grating displacement detection mechanism is embedded inside the initial support structure at the bottom of the tunnel;

[0008] The acoustic detection mechanism is installed on the surrounding rock layer at the bottom of the tunnel;

[0009] The intelligent analysis terminal includes a data input module connected to the moisture content sensing array, the fiber optic grating displacement detection mechanism, and the acoustic wave detection mechanism, a data analysis and comparison module connected to the data input module, and an early warning information transmission module connected to the data analysis and comparison module.

[0010] The early warning display platform is connected to the early warning information transmission module.

[0011] Furthermore, a preferred structure is that a micro grouting pipe assembly is provided at the arch foot of the tunnel bottom; a central control mechanism for the grouting pipe assembly is connected to the grouting control switch of the micro grouting pipe assembly; and the central control mechanism for the grouting pipe assembly is connected to the early warning information transmission module.

[0012] Furthermore, a preferred structure is that the micro-grouting tube assembly includes at least four nano-silicate grouting tubes.

[0013] Furthermore, a preferred structure is that a grouting pressure detection device is provided at the arch foot of the tunnel bottom; the grouting pressure detection device is connected to the central control mechanism of the grouting pipe assembly.

[0014] Furthermore, in a preferred configuration, the central control mechanism of the grouting pipe assembly includes a grouting analysis center module connected to the early warning information transmission module, a grouting pressure data acquisition module and a grouting command execution module respectively connected to the grouting analysis center module; the grouting pressure data acquisition module is connected to the grouting pressure detection element; and the grouting command execution module is connected to the grouting control switch of the micro grouting pipe assembly.

[0015] Furthermore, in a preferred configuration, the grouting pressure detection element is a grouting pressure gauge.

[0016] Furthermore, in a preferred configuration, the moisture content sensing array comprises 10-12 groups of capacitive moisture content sensors arranged at equal intervals; the spacing between adjacent capacitive moisture content sensors is 25-30 cm.

[0017] Furthermore, in a preferred configuration, the fiber optic grating displacement detection mechanism is a fiber optic grating displacement meter.

[0018] Furthermore, in a preferred configuration, the fiber optic grating displacement detection mechanism is fixed to the grating steel frame of the initial support structure via a magnetic base.

[0019] Furthermore, a preferred structure is that a polytetrafluoroethylene protective cover is provided on the outside of the fiber optic grating displacement detection mechanism.

[0020] As can be seen from the above technical solution, the tunnel bottom mudstone settlement monitoring device provided by this utility model collects water content data of the tunnel bottom invert layer, displacement data of the initial support structure, and wave velocity data of the tunnel bottom surrounding rock layer in real time by deploying a water content sensing array in the invert layer of the tunnel bottom, embedding a fiber optic grating displacement detection mechanism inside the initial support structure of the tunnel bottom, and setting an acoustic wave detection mechanism in the surrounding rock layer of the tunnel bottom. The device then transmits the real-time acquired water content data, displacement data, and wave velocity data to an intelligent analysis terminal. The intelligent analysis terminal's data analysis and comparison module then analyzes and compares the real-time acquired data... The system compares the moisture content data with a preset moisture content threshold, the real-time displacement data with a preset displacement threshold, and the real-time wave velocity data with a preset wave velocity threshold. When all three conditions are met simultaneously—moisture content data greater than or equal to the preset moisture content threshold, displacement data greater than or equal to the preset displacement threshold, and wave velocity data less than or equal to the preset wave velocity threshold—an early warning message is generated and transmitted to the early warning display platform via the early warning message transmission module of the intelligent analysis terminal. This provides timely settlement early warning reminders and significantly reduces monitoring costs compared to manual inspection methods, while also offering high early warning accuracy. Attached Figure Description

[0021] Other objects and results of this invention will become clearer and easier to understand with reference to the following description taken in conjunction with the accompanying drawings, and with a more comprehensive understanding of the invention.

[0022] Figure 1 This is a structural connection diagram of the tunnel bottom mudstone settlement monitoring device according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram illustrating the structural connection principle of the central control mechanism of the grouting pipe assembly according to an embodiment of the present invention.

[0024] Figure 3 This is a diagram showing the location of the tunnel bottom mudstone settlement monitoring device according to an embodiment of the present invention on the tunnel.

[0025] Figure 4 This is a schematic diagram of the structural arrangement of the moisture content sensing array according to an embodiment of the present invention.

[0026] In the attached diagram, 1-moisture content sensing array, 11-capacitive moisture content sensor, 2-fiber grating displacement detection mechanism, 3-acoustic wave detection mechanism, 4-intelligent analysis terminal, 41-data input module, 42-data analysis and comparison module, 43-early warning information transmission module, 5-early warning display platform, 61-invert arch layer, 62-initial support structure, 63-surrounding rock layer, 64-arch foot, 7-micro grouting pipe group, 8-grouting pipe group central control mechanism, 81-grouting analysis center module, 82-grouting pressure data acquisition module, 83-grouting command execution module, 9-grouting pressure detection component.

[0027] The same reference numerals in all the accompanying drawings indicate similar or corresponding features or functions. Detailed Implementation

[0028] In response to the aforementioned problem of delayed early warning in the existing manual inspection method for monitoring mudstone settlement at the tunnel bottom, a monitoring device for mudstone settlement at the tunnel bottom is proposed.

[0029] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] To illustrate the tunnel bottom mudstone settlement monitoring device provided by this utility model Figure 1 The structural connection principle of the tunnel bottom mudstone settlement monitoring device according to an embodiment of the present invention is shown; Figure 2 The structural connection principle of the grouting pipe assembly central control mechanism according to an embodiment of the present invention is shown; Figure 3 The location arrangement of the tunnel bottom mudstone settlement monitoring device according to an embodiment of the present invention is shown on the tunnel. Figure 4The structural arrangement of the moisture content sensing array according to an embodiment of the present invention is shown.

[0031] like Figures 1 to 4 As shown in the figure, the tunnel bottom mudstone settlement monitoring device provided by this utility model mainly includes a moisture content sensing array 1, a fiber optic grating displacement detection mechanism 2, an acoustic wave detection mechanism 3, an intelligent analysis terminal 4, and an early warning display platform 5; wherein,

[0032] The moisture content sensing array 1 is deployed on the invert arch layer 61 at the bottom of the tunnel;

[0033] The fiber optic grating displacement detection mechanism 2 is embedded inside the initial support structure 62 at the bottom of the tunnel;

[0034] The acoustic detection mechanism 3 is installed on the surrounding rock layer 63 at the bottom of the tunnel;

[0035] The intelligent analysis terminal 4 includes a data input module 41 connected to the moisture content sensing array 1, the fiber optic grating displacement detection mechanism 2, and the acoustic wave detection mechanism 3, a data analysis and comparison module 42 connected to the data input module 41, and an early warning information transmission module 43 connected to the data analysis and comparison module 42; the early warning display platform 5 is connected to the early warning information transmission module 43.

[0036] It should be noted that the acoustic wave detection mechanism 3 is preferably, but not limited to, an acoustic wave detector, used to obtain the surrounding rock wave velocity of the surrounding rock layer 63 in real time.

[0037] Specifically, the intelligent analysis terminal 4 can be an industrial control terminal, tablet computer, laptop computer, etc. Its data input module 41 can be a data interface, which can be connected to the water content sensing array 1, fiber optic grating displacement detection mechanism 2 and acoustic wave detection mechanism 3 through signals or networks to realize data transmission. The data analysis and comparison module 42 is used to compare the water content data of the invert arch layer 61 with the preset water content threshold, the wave velocity data of the surrounding rock with the preset wave velocity threshold, and the horizontal displacement data of the initial support structure 62 with the preset displacement threshold. According to the set early warning information generation conditions, that is, when the water content data is greater than or equal to the preset water content threshold, the displacement data is greater than or equal to the preset displacement threshold, and the wave velocity data is less than or equal to the preset wave velocity threshold, early warning information is generated. The information is transmitted to the early warning display platform 5 through the early warning information transmission module 43. The early warning information transmission module 43 can be an interface for connecting to the early warning display platform 5 by signal or network.

[0038] Among them, the early warning display platform 5 is preferably, but not limited to, an LED screen or an engineering cloud platform.

[0039] By deploying a water content sensing array 1 in the invert layer 61 at the tunnel bottom, embedding a fiber optic grating displacement detection mechanism 2 inside the initial support structure 62 at the tunnel bottom, and setting an acoustic wave detection mechanism 3 in the surrounding rock layer 63 at the tunnel bottom, the water content data of the invert layer 61, the displacement data of the initial support structure 62, and the wave velocity data of the surrounding rock layer 63 at the tunnel bottom are collected in real time. The water content data, displacement data, and wave velocity data acquired in real time are transmitted to the intelligent analysis terminal 4. In the data analysis and comparison module 42 of the intelligent analysis terminal 4, the real-time water content data is compared with the preset... The system compares the water content threshold, the real-time displacement data with the preset displacement threshold, and the real-time wave velocity data with the preset wave velocity threshold. When all three conditions are met simultaneously—water content data greater than or equal to the preset water content threshold, displacement data greater than or equal to the preset displacement threshold, and wave velocity data less than or equal to the preset wave velocity threshold—an early warning message is generated and transmitted to the early warning display platform 5 via the early warning message transmission module 43 of the intelligent analysis terminal 4. This provides a timely settlement early warning reminder and significantly reduces monitoring costs compared to manual inspection methods, while also offering high early warning accuracy.

[0040] As a preferred embodiment of this utility model, a miniature grouting pipe assembly 7 is provided at the arch foot 64 at the bottom of the tunnel; a grouting pipe assembly central control mechanism 8 is connected to the grouting control switch of the miniature grouting pipe assembly 7; the grouting pipe assembly central control mechanism 8 is connected to the early warning information transmission module 43.

[0041] Specifically, the miniature grouting pipe assembly 7 is used to grout the tunnel floor to reinforce it. A grouting control switch is installed on it to control the grouting process. This switch is an intelligent switch that can be signal-connected to the central control mechanism 8 of the grouting pipe assembly. When the early warning information transmission module 43 sends settlement early warning information to the central control mechanism 8, the central control mechanism 8 controls the grouting operation of the miniature grouting pipe assembly 7.

[0042] As a preferred embodiment of this utility model, the micro grouting pipe assembly 7 includes at least four nano-silicate grouting pipes.

[0043] It should be noted that in this utility model, the micro grouting pipe group 7 preferably includes at least four nano-silicate grouting pipes, and the number of nano-silicate grouting pipes can be set according to actual needs.

[0044] As a preferred embodiment of this utility model, a grouting pressure detection element 9 is provided at the arch foot 64 at the bottom of the tunnel; the grouting pressure detection element 9 is connected to the central control mechanism 8 of the grouting pipe group.

[0045] Specifically, by setting a grouting pressure detection device 9 at the arch foot 64 at the bottom of the tunnel, the grouting pressure at the bottom of the tunnel is detected in real time, and the obtained grouting pressure data is sent to the central control mechanism 8 of the grouting pipe group. The central control mechanism 8 of the grouting pipe group compares the real-time obtained grouting pressure data with the preset grouting pressure threshold. When the grouting pressure data reaches the preset grouting pressure threshold, the micro grouting pipe group 7 is controlled to stop the grouting work.

[0046] As a preferred embodiment of this utility model, the grouting pipe group central control mechanism 8 includes a grouting analysis center module 81 connected to the early warning information transmission module 43, a grouting pressure data acquisition module 82 and a grouting command execution module 83 respectively connected to the grouting analysis center module 81; the grouting pressure data acquisition module 82 is connected to the grouting pressure detection element 9; and the grouting command execution module 83 is connected to the grouting control switch of the micro grouting pipe group 7.

[0047] Specifically, the grouting analysis center module 81 is used to control the grouting work of the micro grouting pipe group 7 based on the acquired early warning information, and to acquire the grouting pressure data of the tunnel bottom in real time from the grouting pressure detection element 9 after the grouting work starts, and compare it with the preset grouting pressure threshold to control the timing of stopping grouting.

[0048] As a preferred embodiment of this utility model, the grouting pressure detection component 9 is a grouting pressure gauge.

[0049] It should be noted that in this utility model, the grouting pressure detection element 9 is preferably, but not limited to, a grouting pressure gauge.

[0050] As a preferred embodiment of this utility model, the moisture content sensing array 1 includes 10-12 groups of capacitive moisture content sensors 11 arranged at equal intervals; the spacing between adjacent capacitive moisture content sensors 11 is 25-30cm.

[0051] Specifically, the moisture content sensing array 1 preferably includes, but is not limited to, 10-12 groups of capacitive moisture content sensors 11 arranged at equal intervals. The spacing between adjacent capacitive moisture content sensors 11 is preferably 25-30 cm, the measurement range is preferably 0-35%, and the resolution is ±0.5%. It can have built-in self-cleaning electrodes to prevent mudstone particles from adhering.

[0052] As a preferred embodiment of this utility model, the fiber optic grating displacement detection mechanism 2 is a fiber optic grating displacement meter.

[0053] It should be noted that in this utility model, the fiber optic grating displacement detection mechanism 2 is preferably, but not limited to, a fiber optic grating displacement meter.

[0054] Specifically, the fiber optic displacement gauge is preferably set up in a cross arrangement at a 45° angle to the horizontal plane, with a measurement accuracy of ±0.02mm and a sampling frequency of ≥10Hz.

[0055] As a preferred embodiment of this utility model, the fiber optic grating displacement detection mechanism 2 is fixed to the grating steel frame of the initial support structure 62 by a magnetic base (not shown in the figure).

[0056] Specifically, the fiber optic grating displacement detection mechanism 2 can be fixed to the grid steel frame of the primary support structure 62 using a magnetic base, which is readily disassembled.

[0057] As a preferred embodiment of this utility model, a polytetrafluoroethylene protective cover (not shown in the figure) is provided on the outside of the fiber optic grating displacement detection mechanism 2.

[0058] Specifically, by wrapping the fiber optic grating displacement detection mechanism 2 with a polytetrafluoroethylene protective cover, the fiber optic grating displacement detection mechanism 2 can be made waterproof.

[0059] As can be seen from the above specific embodiments, the tunnel bottom mudstone settlement monitoring device provided by this utility model collects water content data of the tunnel bottom invert layer, displacement data of the initial support structure, and wave velocity data of the tunnel bottom surrounding rock layer in real time by deploying a water content sensing array in the invert layer, embedding a fiber optic grating displacement detection mechanism inside the initial support structure of the tunnel bottom, and setting an acoustic wave detection mechanism in the surrounding rock layer of the tunnel bottom. The device transmits the real-time water content data, displacement data, and wave velocity data to an intelligent analysis terminal in real time. In the data analysis and comparison module of the intelligent analysis terminal, the real-time water content data is compared with a preset water content threshold, the real-time displacement data is compared with a preset displacement threshold, and the real-time wave velocity data is compared with a preset wave velocity threshold. When the water content data is greater than or equal to the preset water content threshold, the displacement data is greater than or equal to the preset displacement threshold, and the wave velocity data is less than or equal to the preset wave velocity threshold, an early warning information is generated and transmitted to the early warning display platform through the early warning information transmission module of the intelligent analysis terminal, so as to provide a timely settlement early warning reminder. Compared with manual inspection, it greatly saves monitoring costs and has a high early warning accuracy.

[0060] The tunnel bottom mudstone settlement monitoring device according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the tunnel bottom mudstone settlement monitoring device proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A monitoring device for mudstone settlement at the bottom of a tunnel, characterized in that, It includes a moisture content sensing array, a fiber optic grating displacement detection mechanism, an acoustic wave detection mechanism, an intelligent analysis terminal, and an early warning display platform; among which, The moisture content sensing array is deployed on the invert arch layer at the bottom of the tunnel; The fiber optic grating displacement detection mechanism is embedded inside the initial support structure at the bottom of the tunnel; The acoustic detection mechanism is installed on the surrounding rock layer at the bottom of the tunnel; The intelligent analysis terminal includes a data input module connected to the moisture content sensing array, the fiber optic grating displacement detection mechanism, and the acoustic wave detection mechanism, a data analysis and comparison module connected to the data input module, and an early warning information transmission module connected to the data analysis and comparison module. The early warning display platform is connected to the early warning information transmission module.

2. The tunnel bottom mudstone settlement monitoring device according to claim 1, characterized in that, Miniature grouting pipe assemblies are installed at the arch foot of the tunnel bottom; A central control mechanism for the grouting pipe assembly is connected to the grouting control switch of the micro grouting pipe assembly. The central control mechanism of the grouting pipe group is connected to the early warning information transmission module.

3. The tunnel bottom mudstone settlement monitoring device according to claim 2, characterized in that, The micro-grouting pipe assembly includes at least four nano-silicate grouting pipes.

4. The tunnel bottom mudstone settlement monitoring device according to claim 2, characterized in that, Grouting pressure detection devices are installed at the arch foot of the tunnel bottom; The grouting pressure detection device is connected to the central control mechanism of the grouting pipe assembly.

5. The tunnel bottom mudstone settlement monitoring device according to claim 4, characterized in that, The grouting pipe group central control mechanism includes a grouting analysis center module connected to the early warning information transmission module, a grouting pressure data acquisition module and a grouting command execution module respectively connected to the grouting analysis center module; The grouting pressure data acquisition module is connected to the grouting pressure detection device; The grouting command execution module is connected to the grouting control switch of the micro grouting pipe group.

6. The tunnel bottom mudstone settlement monitoring device according to claim 4, characterized in that, The grouting pressure detection component is a grouting pressure gauge.

7. The tunnel bottom mudstone settlement monitoring device according to claim 1, characterized in that, The moisture content sensing array includes 10-12 groups of capacitive moisture content sensors arranged at equal intervals. The spacing between adjacent capacitive moisture content sensors is 25-30cm.

8. The tunnel bottom mudstone settlement monitoring device according to claim 1, characterized in that, The fiber optic grating displacement detection mechanism is a fiber optic grating displacement meter.

9. The tunnel bottom mudstone settlement monitoring device according to claim 1, characterized in that, The fiber optic grating displacement detection mechanism is fixed to the grating steel frame of the primary support structure by a magnetic base.

10. The tunnel bottom mudstone settlement monitoring device according to claim 1, characterized in that, The fiber optic grating displacement detection mechanism is covered with a polytetrafluoroethylene protective cover.

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