CN212903153U - Tunnel vault warp automatic monitoring device - Google Patents

Abstract

The application provides a tunnel vault warp automatic monitoring device. The method comprises the following steps: a plurality of inclinometer bars, a plurality of hinge pieces, cables, and a data acquisition system; the hinge pieces are sequentially arranged at the arch crown part along the axial direction of the tunnel, and the hinge pieces are fixed on the primary support layer of the tunnel; an inclinometry rod piece is arranged between every two adjacent hinge pieces, a cable is arranged inside each inclinometry rod piece, and the cables are connected with a data acquisition system. A chain-shaped inclination measuring system is formed by the inclination measuring rod piece, the hinge piece, the cable and the data acquisition system, so that the deformation of the vault at different measuring points is automatically measured; the test point redistribution requirement can be met along with the advancing of the tunnel face, and the equipment can be recycled. The method has the outstanding advantages of high measurement precision, low equipment cost, convenience in field operation and the like.

Description

Tunnel vault warp automatic monitoring device

Technical Field

The utility model relates to a ground deformation monitoring technology field, concretely relates to tunnel vault warp automatic monitoring device.

Background

In recent years, the construction strength of infrastructure in China is gradually increased, and tunnel engineering is increasingly increased. The tunnel monitoring can provide reliable information for the evaluation of the tunnel construction safety and the stability of the tunnel supporting structure. At present, tunnel deformation monitoring methods mainly comprise various convergence meters, measurement of horizontal convergence and vault settlement of a tunnel by matching a precise level with a hanging ruler, displacement monitoring by using a total station and a reflecting prism, and the like. None of the above methods can achieve real-time automatic measurement.

Practice has shown that tunnel deformation damage occurs mainly near the face of the tunnel and is most severe in the form of vault collapse. The vault part can go through the settlement deformation accumulation stage before the collapse is formed, and the timely mastering of the vault settlement deformation development condition has important significance for guaranteeing the safe construction of the tunnel.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present application is directed to provide an automatic monitoring device for tunnel vault deformation.

And a chain-shaped inclination measuring system arranged at the vault along the axial direction of the tunnel is utilized to automatically measure the vault deformation of different measuring points.

An embodiment of an aspect of the present application provides an automatic monitoring device for tunnel vault deformation, including: a plurality of inclinometer bars, a plurality of hinge pieces, cables, and a data acquisition system; the hinge pieces are sequentially arranged at the arch crown part along the axial direction of the tunnel, and the hinge pieces are fixed on the primary support layer of the tunnel; an inclinometry rod piece is arranged between every two adjacent hinge pieces, a cable is arranged inside each inclinometry rod piece, and the cables are connected with a data acquisition system.

Preferably, the hinge part is connected with the elastic hanging part and fixed on the primary support layer of the tunnel.

In any one of the above embodiments, preferably, one end of the elastic hanging piece is connected with the tunnel primary support layer by an anchor, and the other end of the elastic hanging piece is welded with the hinge piece.

In any one of the above embodiments, preferably, the elastic suspension is a spring.

In any one of the above embodiments, preferably, each of the inclinometer bar members is fixedly connected with one end of the hinge member through a rotating shaft, and the inclinometer bar members and the hinge member are relatively rotated through the rotating shaft.

In any one of the above embodiments, preferably, the rotating shaft is a screw, and one end of the screw is fastened by a nut.

In any of the above embodiments, preferably, the inclinometer bar is provided with a built-in sensor, and the sensor is a servo accelerometer inclinometer connected to a cable inside the inclinometer bar.

In any one of the above embodiments, preferably, the inclinometer bar member is made of a stainless steel bar, and the length of the inclinometer bar member is 1 to 2 meters.

In any of the above embodiments, preferably, the cables in two adjacent inclinometer bars are connected by a cable connector.

Preferably, in any one of the above embodiments, the data acquisition system is fixed at the lining trolley position.

The embodiment of the application provides a tunnel vault warp automatic monitoring device, compares in prior art and has following advantage at least:

1. according to the automatic monitoring device, the chain-shaped inclination measuring system is formed by the inclination measuring rod piece, the hinge piece, the cable and the data acquisition system, so that the vault deformation of different measuring points can be automatically measured; the test point redistribution requirement can be met along with the advancing of the tunnel face, and the equipment can be recycled. The method has the outstanding advantages of high measurement precision, low equipment cost, convenience in field operation and the like.

2. The hinge part of this application is fixed on the tunnel just props up the layer through connecting the elasticity pendant, and the impact effect of tunnel excavation blasting to monitoring system can effectively be alleviateed to the elasticity pendant.

3. When the hinge piece is fixed with the inclinometer rod piece, the rotating shaft is adopted, so that the inclinometer rod piece and the hinge piece can rotate relatively, the hinge piece is smooth and free of friction, the measurement error is reduced, and the measurement accuracy is improved.

4. The data acquisition system is fixed in lining trolley position department in this application, can walk along with the construction progress, realizes measureing automatically different measurement station vault deflection.

Drawings

Fig. 1 is a schematic structural diagram of an automatic monitoring device for tunnel vault deformation according to an embodiment of the present application.

Fig. 2 is a schematic partial composition diagram of an elastic hanging member and a hinge member according to an embodiment of the present application.

Figure 3 is a schematic top cross-sectional view of a hinge according to an embodiment of the present application.

In the figure:

1. a tunnel primary support layer; 2. an elastic hanging piece; 3. a hinge member; 4. a inclinometer bar;

5. a cable; 6. a data acquisition system; 7. a cable connector; 8. a screw; 9. and (4) a nut.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.

Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.

As shown in fig. 1, an embodiment of the present application provides an automatic monitoring device for tunnel vault deformation, including: a plurality of inclinometer bars 4, a plurality of hinge members 3, cables 5, and a data acquisition system 6; the hinge pieces 3 are sequentially arranged at the arch crown part along the axial direction of the tunnel, and the hinge pieces 3 are fixed on the primary support layer 1 of the tunnel; be equipped with deviational survey member 4 between two adjacent hinge pieces 3, every 4 inside cables 5 that all are equipped with of deviational survey member, cables 5 connect data acquisition system 6.

In the embodiment, a chain-shaped inclination measuring system is formed by an inclination measuring rod piece 4, a hinge piece 3, a cable 5 and a data acquisition system 6, the inclination measuring rod piece 4 is arranged at different measuring points of the vault, the inclination measuring rod piece 4 is fixed by the hinge piece 3, so that a built-in sensor and the cable 5 are fixed, deformation data measured by the sensor is used for uniformly transmitting measurement data of different measuring points, and automatic measurement of vault deformation of different measuring points is realized; the test point redistribution requirement can be met along with the advancing of the tunnel face, and the equipment can be recycled. The method has the outstanding advantages of high measurement precision, low equipment cost, convenience in field operation and the like.

As shown in fig. 2, the hinge member 3 is connected with the elastic hanging member 2 and fixed on the primary tunnel supporting layer 1.

Furthermore, one end of the elastic hanging piece 2 is connected with the tunnel primary support layer 1 through an anchor, and the other end of the elastic hanging piece is welded with the hinge piece 3. In this embodiment, preferably, the elastic suspension member 2 is a spring, which can effectively reduce the impact of tunnel excavation blasting on the monitoring system.

As shown in fig. 3, each of the inclinometer bar parts 4 is fixedly connected with one end of the hinge part 3 through a rotating shaft, and the inclinometer bar parts 4 and the hinge part 3 rotate relatively through the rotating shaft. Further, the rotating shaft adopts a screw 8, and one end of the screw 8 is fastened through a nut 9. When the hinge piece is fixed with the inclinometer rod piece, the rotating shaft is adopted, so that the inclinometer rod piece and the hinge piece can rotate relatively, the hinge piece is smooth and free of friction, the measurement error is reduced, and the measurement accuracy is improved.

As a more preferred embodiment, the inclinometer bar 4 is provided with a built-in sensor, which is a servo accelerometer type inclinometer. The servo accelerometer type inclinometer is connected with a cable 5 arranged in an inclinometer rod piece 4, the inclinometer rod piece 4 is made of a stainless steel rod, and the length of the inclinometer rod piece 4 is 1-2 meters. The cables 5 in two adjacent inclinometer bars 4 are connected through a cable connector 7.

In the present embodiment, when the vault deforms, the inclinometer bar 4 tilts along with the vault, the servo accelerometer type inclinometer acquires the inclination of the inclinometer bar 4 and transmits the acquired inclination to the data acquisition system 6 through the cable 5, and further, in order to simplify the cable structure, the cable 5 in two adjacent inclinometer bars 4 can be connected by using the cable connector 7.

Further, the data acquisition system 6 is fixed at the position of the lining trolley. In the embodiment, in the actual use process of the measuring device, one end of the chain-shaped measuring system is fixed in a region (such as a lining trolley position) behind a tunnel face where the deformation of surrounding rock is relatively stable, and then a series of inclinometers are arranged on a vault section along the axial direction of the tunnel. The sinking deformation of any measuring point relative to the fixed end can be obtained by detecting the inclination angle of each measuring point, then calculating to obtain the relative deformation of each section, and arithmetically summing the deformation of each section.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The utility model provides a tunnel vault warp automatic monitoring device which characterized in that includes: a plurality of inclinometer bars (4), a plurality of hinge pieces (3), cables (5) and a data acquisition system (6);

the hinge pieces (3) are sequentially arranged at the arch crown part along the axial direction of the tunnel, and the hinge pieces (3) are fixed on the primary support layer (1) of the tunnel; be equipped with deviational survey member (4) between two adjacent hinge spare (3), every deviational survey member (4) inside all is equipped with cable (5), data acquisition system (6) are connected in cable (5).

2. The automatic monitoring device according to claim 1, characterized in that the hinge member (3) is connected with the elastic suspension member (2) and fixed on the primary tunnel support layer (1).

3. The automatic monitoring device according to claim 2, characterized in that the elastic hanging piece (2) is connected with the tunnel primary support layer (1) by an anchor at one end and is welded with the hinge piece (3) at the other end.

4. An automatic monitoring device according to claim 3, characterized in that said elastic suspension (2) is a spring.

5. The automatic monitoring device according to claim 1, characterized in that each of said inclinometer bars (4) is fixedly connected with one end of the hinge member (3) through a rotating shaft, and the inclinometer bars (4) are rotated relative to the hinge member (3) through the rotating shaft.

6. The automatic monitoring device according to claim 5, characterized in that the rotating shaft is a screw (8), and one end of the screw (8) is fastened by a nut (9).

7. An automatic monitoring device according to claim 1, characterized in that the inclinometer bar (4) is built-in with sensors, which are servo accelerometer inclinometers, connected to cables (5) inside the inclinometer bar (4).

8. The automatic monitoring device according to claim 1, characterized in that the deviational survey pole member (4) is a stainless steel pole, and the length of the deviational survey pole member (4) is 1 to 2 meters.

9. An automatic monitoring device according to claim 1, characterized in that the cables (5) in two adjacent inclinometer bars (4) are connected by a cable connector (7).

10. The automatic monitoring device according to claim 1, characterized in that the data acquisition system (6) is fixed at the lining trolley position.

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