Distributed tunnel supporting structure internal force monitoring device

Abstract

The utility model discloses a distributed tunnel supporting structure internal force monitoring device which comprises a fixed seat and a threaded rod. According to the distributed tunnel supporting structure internal force monitoring device, a monitoring assembly comprises symmetrically-arranged fixing seats, twelve mounting holes are circumferentially formed in the opposite sides of each fixing seat, threaded rods penetrate through the four corresponding mounting holes formed in the circumference in pairs, and first nuts are in threaded connection with the two sides, corresponding to the fixing seats, of the threaded rods; mounting seats are arranged on the outer sides of the threaded rods, the threaded rods of the upper monitoring assembly penetrate through the corresponding mounting holes in the fixing seats at the top of the lower monitoring assembly, third nuts are in threaded connection with the two sides, corresponding to the fixing seats, of the threaded rods, and the fixing seats are matched with the threaded rods and the first nuts to form a mounting foundation; and a fiber bragg grating surface strain gauge is mounted on the outer circumference of the foundation, so that a circumferential distributed internal force monitoring effect can be formed, and multi-point monitoring on a bearing column of a tunnel supporting structure is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel support monitoring technical field, concretely is a kind of distributed tunnel support structure internal force monitoring device. BACKGROUND

[0002] In the tunnel construction process, the tunnel is assisted and supported by support structure, if the support structure is subjected to greater bearing capacity in the use process of support structure, the deformation and displacement of support structure will be caused;If the strength and rigidity of support structure are insufficient, it will lead to the fracture of support structure, even serious accidents such as collapse.Therefore, the internal force monitoring of support structure is needed, the working state of support structure itself is understood in time, dynamic monitoring is carried out in the construction process, timely alarm is given in the case of foreknowledge of possible dangerous situation, so that corresponding emergency measures are taken.

[0003] The internal force monitoring of the prior art is usually carried out by fiber grating surface strain gauge, the fiber grating surface strain gauge is directly installed on the bearing column of support structure, so as to monitor the internal force, but only one fiber grating surface strain gauge is used to monitor the internal force, only one monitoring point can be formed, and the detection length range is fixed, so the monitoring is not comprehensive enough, therefore a kind of distributed tunnel support structure internal force monitoring device is proposed to facilitate the comprehensive internal force monitoring of tunnel support structure. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of distributed tunnel support structure internal force monitoring device to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A distributed tunnel support structure internal force monitoring device includes a monitoring component, wherein the monitoring component is provided with multiple components, the monitoring component includes a symmetrically arranged fixing seat, and the opposite sides of the fixing seat are circumferentially provided with twelve mounting holes, wherein four circumferentially provided corresponding mounting holes are penetrated by threaded rods in pairs, and the threaded rods are threadedly connected to the first nuts on both sides of the corresponding fixing seats, and the outer sides of the threaded rods are provided with mounting seats, and the mounting seats are fitted and adapted to the extension of the fixing seats, and the corresponding mounting holes on the mounting seats are fixedly connected with fixing ears, and the fixing ears are penetrated by the first fixing bolts, and the fixing ears are provided with a first fixing bolt for the first fixing bolt. A circular hole is passed through the mounting base, a first fixing bolt also passes through the corresponding mounting hole and a second nut is threadedly connected to the end thereof, a fiber Bragg grating surface strain gauge is installed on the mounting base, the fiber Bragg grating surface strain gauges are connected together through a sensing optical fiber, the two free ends of the sensing optical fiber are connected to a BOTDR demodulator, and the BOTDR demodulator is used to receive real-time parameters transmitted by the sensing optical fiber. As for the specific connection circuit and relationship between the BOTDR demodulator and the sensing optical fiber, existing technologies can be used; the fiber Bragg grating surface strain gauge is used to sense the real-time deformation and / or displacement of the bearing column of the tunnel support structure.

[0007] As a further solution of the present invention: the monitoring components are superimposed and installed on the outside of the bearing columns of the tunnel support structure, two adjacent monitoring components are staggered and the threaded rods are staggered at forty-five degrees from the center of the circle.

[0008] As a further solution of the present invention: the threaded rod of the upper monitoring assembly passes through the corresponding mounting hole on the fixing seat at the top of the lower monitoring assembly, and the third nut is threadedly connected to both sides of the threaded rod corresponding to the fixing seat.

[0009] As a further solution of the present invention: fixing buckles are provided on the outer sides of the fixing sections at both ends of the fiber grating surface strain gauge, and second fixing bolts are passed through both ends of the fixing buckles. Circular holes for the second fixing bolts to pass through are symmetrically provided on both sides of the fixing buckles. The second fixing bolts are inserted into the mounting base and threadedly connected to the mounting base. The mounting base is provided with threaded holes for the second fixing bolts to be threadedly connected.

[0010] As a further solution of the present invention: both ends of the fixing buckle are symmetrically fixedly connected with positioning pins, and positioning holes corresponding to the positioning pins are opened on the mounting seat. Through the setting of the positioning holes and positioning pins, the fixing buckle can be conveniently positioned during installation and misalignment after installation can be avoided.

[0011] As a further solution of the present invention: a deformation groove is provided on the head of the fixing seat, and a throat clamp is covered on the outside of the deformation groove. The fixing seat is composed of two symmetrically arranged semicircular components. The splicing seams of the fixing seats of adjacent monitoring components are vertically staggered. The splicing seams are vertically staggered, so that the fixing seat of the lower monitoring component located in the upper monitoring component is cross-pierced by the corresponding threaded rod, so that all the fixing seats are conveniently combined to form a whole, thereby improving the structural stability of the device after assembly.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model forms an installation base by means of a fixing seat, a threaded rod and a first nut, and a fiber Bragg grating surface strain gauge is installed on the outer circumference of the base, thereby forming a circumferential distributed internal force monitoring effect, which facilitates multi-point monitoring of the bearing columns of the tunnel support structure.

[0014] 2. The utility model controls the fixed position of the corresponding fixing seat by adjusting the position of the third nut on the threaded rod, thereby controlling the overlap of two adjacent monitoring components, thereby facilitating the use of internal force monitoring of the bearing columns of tunnel support structures of different lengths, and further forming more fiber grating surface strain gauge distributions, forming more monitoring points on the bearing columns of the tunnel support structure.

[0015] 3. The utility model positions the fixing buckle by the cooperation of the positioning pin and the positioning hole, and locks the fixing buckle on the mounting base by the second fixing bolt, so that the fiber grating surface strain gauge can be fixedly installed conveniently.

[0016] 4. The fixing seat of the utility model can be split into two halves, so that it can be conveniently combined with the bearing column of the tunnel support structure. The deformation groove is squeezed and locked by the throat clamp, so that the deformation groove section on the fixing seat is squeezed and fixed to the bearing column of the tunnel support structure, so that the device can be conveniently fixed and assembled and installed on the bearing column of the tunnel support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Fig. 1 The figure is a structural diagram of a distributed tunnel support structure internal force monitoring device.

[0018] Fig. 2 This is a diagram showing the combination of monitoring components in a distributed tunnel support structure internal force monitoring device.

[0019] Fig. 3 This is an enlarged view of A in a distributed tunnel support structure internal force monitoring device.

[0020] Fig. 4 This is a separate display diagram of the monitoring components in a distributed tunnel support structure internal force monitoring device.

[0021] Fig. 5 It is a local structure explosion display diagram of a distributed tunnel support structure internal force monitoring device.

[0022] In the figure: 1, monitoring assembly; 2, load-bearing column of tunnel support structure; 3, fixing seat; 4, mounting hole; 5, threaded rod; 6, first nut; 7, mounting seat; 8, fixing lug; 9, first fixing bolt; 10, second nut; 11, fiber grating surface strain gauge; 12, third nut; 13, fixing buckle; 14, second fixing bolt; 15, positioning pin; 16, positioning hole; 17, deformation groove; 18, hose clamp. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figs. 1-5 In the embodiments of the utility model, a distributed tunnel support structure internal force monitoring device comprises monitoring assemblies 1, the monitoring assemblies 1 are provided in plurality, the monitoring assemblies 1 comprise fixing seats 3 arranged symmetrically, twelve mounting holes 4 are circumferentially provided on the opposite edges of the fixing seat 3, two threaded rods 5 are penetrated through the corresponding mounting holes 4 circumferentially provided in pairs, the threaded rods 5 are threadedly connected with first nuts 6 on the two sides of the fixing seat 3 correspondingly, the outer sides of the threaded rods 5 are provided with mounting seats 7, the mounting seats 7 are in external extension adhesion and adaptation with the fixing seat 3, fixing lugs 8 are fixedly connected on the mounting seats 7 corresponding to the mounting holes 4, first fixing bolts 9 are penetrated through the fixing lugs 8, circular holes for the penetration of the first fixing bolts 9 are formed on the fixing lugs 8, the first fixing bolts 9 are simultaneously penetrated through the corresponding mounting holes 4 and are threadedly connected with second nuts 10 at the end portions, fiber grating surface strain gauges 11 are mounted on the mounting seats 7, the fiber grating surface strain gauges 11 are connected together through sensing optical fibers, the two free ends of the sensing optical fibers are connected with a BOTDR demodulator, the BOTDR demodulator is used for receiving real-time parameters transmitted by the sensing optical fiber, and the specific connection circuit and relationship between the BOTDR demodulator and the sensing optical fiber can be obtained by using the prior art; the fiber grating surface strain gauges 11 are used for sensing the real-time deformation and / or displacement of the load-bearing column 2 of the tunnel support structure.

[0025] The fixing seat 3, the threaded rod 5 and the first nut 6 form an installation base, the fiber grating surface strain gauges 11 are circumferentially mounted on the outer side of the base, so that the circumferential distributed internal force monitoring effect can be formed, and the load-bearing column 2 of the tunnel support structure can be conveniently monitored at multiple points.

[0026] The monitoring components 1 are superimposed and installed on the outside of the bearing columns 2 of the tunnel support structure. Two adjacent monitoring components 1 are staggered and the threaded rods 5 are staggered at 45 degrees from the center of the circle.

[0027] The threaded rod 5 of the upper monitoring component 1 passes through the corresponding mounting hole 4 on the fixing base 3 at the top of the lower monitoring component 1 , and third nuts 12 are threadedly connected on both sides of the threaded rod 5 corresponding to the fixing base 3 .

[0028] By adjusting the position of the third nut 12 on the threaded rod 5, the fixed position of the corresponding fixing seat 3 is controlled, thereby controlling the overlap amount of two adjacent monitoring components 1, thereby facilitating the internal force monitoring of the bearing columns 2 of tunnel support structures of different lengths, and at the same time further forming more fiber grating surface strain gauges 11 distribution, forming more monitoring points on the bearing columns 2 of the tunnel support structure.

[0029] The outer sides of the fixed sections at both ends of the fiber Bragg grating surface strain gauge 11 are buckled with fixing buckles 13, and second fixing bolts 14 are passed through both ends of the fixing buckles 13. Circular holes for the second fixing bolts 14 to pass through are symmetrically opened on both sides of the fixing buckles 13. The second fixing bolts 14 are inserted into the mounting base 7 and threadedly connected to the mounting base 7. The mounting base 7 is provided with a threaded hole for the second fixing bolts 14 to be threadedly connected.

[0030] Both ends of the fixing buckle 13 are symmetrically fixedly connected with positioning pins 15, and a positioning hole 16 is opened on the mounting seat 7 corresponding to the positioning pin 15. Through the setting of the positioning hole 16 and the positioning pin 15, the fixing buckle 13 can be conveniently positioned during installation and avoid misalignment after installation.

[0031] The fixing buckle 13 is positioned by the cooperation of the positioning pin 15 and the positioning hole 16 , and the fixing buckle 13 is locked on the mounting base 7 by the second fixing bolt 14 , so that the fiber Bragg grating surface strain gauge 11 can be conveniently fixed and installed.

[0032] A deformation groove 17 is provided on the head of the fixing seat 3, and a throat clamp 18 is covered on the outside of the deformation groove 17. The fixing seat 3 is composed of two symmetrically arranged semicircular components. The splicing seams of the fixing seats 3 of adjacent monitoring components 1 are vertically staggered. The splicing seams are vertically staggered, so that the fixing seat 3 of the lower monitoring component 1 located in the upper monitoring component 1 is cross-pierced by the corresponding threaded rod 5, so that all the fixing seats 3 are combined to form a whole, thereby improving the structural stability of the device after assembly.

[0033] The fixed seat 3 can be split into two halves, so that it can be conveniently combined on the load-bearing column 2 of the tunnel support structure, the locking deformation groove 17 is extruded by the throat clamp 18, so that the deformation groove 17 on the fixed seat 3 is extruded and fixed with the load-bearing column 2 of the tunnel support structure, so that the device can be conveniently fixed, combined and installed on the load-bearing column 2 of the tunnel support structure.

[0034] The working principle of the utility model is:

[0035] In use, the fixed seat 3 is combined on the load-bearing column 2 of the tunnel support structure, at this time, the threaded rod 5 is installed in the corresponding installation hole 4 and is fixedly installed through the first nut 6, the spacing of the fixed seat 3 is controlled, the third nut 12 is correspondingly locked, the overlapping length of the fixed seat 3 is controlled, at this time, the installation seat 7 is fixed through the fixed lug 8 by fixing through the throat clamp 18, the first fixed bolt 9 is threadedly connected with the second nut 10 after penetrating through the installation hole 4 and the fixed lug 8, the fixed installation of the installation seat 7 is completed, the installation seat 7 of the adjacent two monitoring assemblies 1 is installed in a staggered manner, at this time, the fiber grating surface strain gauge 11 is placed corresponding to the two installation seats 7, the fixed buckle 13 is placed corresponding to the installation seat 7 through the cooperation of the positioning pin 15 and the positioning hole 16, and is locked and fixed through the second fixed bolt 14, so that the installation, combination and fixation of the fiber grating surface strain gauge 11 are completed. The fiber grating surface strain gauge 11 senses the change of the load-bearing column 2 of the tunnel support structure, and whether the support structure has an abnormality can be known in time, and the structure is simple and reliable.

[0036] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A distributed tunnel support structure internal force monitoring device, comprising a monitoring component (1), characterized in that: The monitoring assembly (1) is provided with a plurality of monitoring assemblies, comprising a symmetrically arranged fixing seat (3), wherein the fixing seat (3) has twelve mounting holes (4) formed on opposite sides thereof, wherein threaded rods (5) are passed through in pairs in the corresponding mounting holes (4) arranged on the four circumferences, and the threaded rods (5) are threadedly connected to first nuts (6) on both sides of the fixing seat (3) corresponding to the threaded rods (5), and mounting seats (7) are provided on the outer sides of the threaded rods (5), and the mounting seats (7) are fitted and adapted to the extension of the fixing seat (3), and a fixing ear (8) is fixedly connected to the corresponding mounting hole (4) on the mounting seat (7), and a first fixing bolt (9) is passed through the fixing ear (8), and the first fixing bolt (9) simultaneously passes through the corresponding mounting hole (4) and is threadedly connected to a second nut (10) at the end thereof, and a fiber Bragg grating surface strain gauge (11) is installed on the mounting seat (7).

2. A distributed tunnel support structure internal force monitoring device according to claim 1, characterized in that: The monitoring components (1) are superimposed and installed on the outside of the bearing columns (2) of the tunnel support structure, two adjacent monitoring components (1) are staggered, and the threaded rods (5) are staggered at forty-five degrees about the center of the circle.

3. A distributed tunnel support structure internal force monitoring device according to claim 2, characterized in that: The threaded rod (5) of the upper monitoring assembly (1) passes through the corresponding mounting hole (4) on the fixing seat (3) at the top of the lower monitoring assembly (1), and third nuts (12) are threadedly connected on both sides of the threaded rod (5) corresponding to the fixing seat (3).

4. A distributed tunnel support structure internal force monitoring device according to claim 1, characterized in that: The outer sides of the fixed sections at both ends of the fiber Bragg grating surface strain gauge (11) are provided with fixing buckles (13), and second fixing bolts (14) are passed through both ends of the fixing buckles (13). The second fixing bolts (14) are inserted into the mounting seat (7) and are threadedly connected to the mounting seat (7).

5. A distributed tunnel support structure internal force monitoring device according to claim 4, characterized in that: Both ends of the fixing buckle (13) are symmetrically fixedly connected with positioning pins (15), and positioning holes (16) are opened on the mounting seat (7) corresponding to the positioning pins (15).

6. A distributed tunnel support structure internal force monitoring device according to claim 1, characterized in that: The head of the fixing seat (3) is provided with a deformation groove (17), and the outer side of the deformation groove (17) is covered with a throat clamp (18). The fixing seat (3) is composed of two symmetrically arranged semicircular components, and the splicing seams of the fixing seats (3) of adjacent monitoring components (1) are vertically staggered.

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