CN209894121U

CN209894121U - Dam body settlement monitoring device

Info

Publication number: CN209894121U
Application number: CN201921011771.5U
Authority: CN
Inventors: 张文潮; 石建伟; 王旭敏
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-01-03
Anticipated expiration: 2029-07-02

Abstract

The utility model belongs to the technical field of dam body settlement monitoring, in particular to a dam body settlement monitoring device, wherein a plurality of monitoring grooves are arranged on the upper surface of the dam body along the length direction of the dam body, and strain sensing optical fibers are fixed in the monitoring grooves; a layer of fixed layer is poured on the upper surface of the dam body; the strain sensing optical fibers are distributed in a U shape in the monitoring groove, two ends of each strain sensing optical fiber are connected with an optical fiber data acquisition and analysis system through optical cables, and the optical fiber data acquisition and analysis system is connected with an optical fiber data processing, analysis and display system through the optical cables; fixed bed upper surface is fixed with one and measures the board, measures the even scale that is equipped with on the board, the dam body is equipped with laser generator outward, and laser generator's laser mouth perpendicular to measures the board, the utility model discloses in, the dam body subsides monitoring result accurate, and the monitoring result receives environmental factor's such as atmospheric pressure, temperature interference little.

Description

Dam body settlement monitoring device

Technical Field

The utility model belongs to dam body settlement monitoring field, concretely relates to improvement on dam body settlement monitoring device.

Background

At present, the construction achievements of dams and hydraulic power plants in China are accumulated, higher requirements are provided for the safety monitoring of the dams, and the dam body settlement of the dams is an important evaluation index in the safety monitoring of the dams. In the prior art, a dam body settlement monitoring instrument mainly uses a water-tube settlement meter, and the water-tube settlement meter is used for measuring dam body settlement based on the principle of a communicating vessel. The observation principle is simple, the operability is strong, the engineering application practice is rich, and the automatic monitoring can be realized by combining the modern sensing technology.

However, the settlement meter in the prior art generally monitors settlement of the dam body by means of embedding or fixing the settlement meter on the side wall of the dam body, and embedding or punching holes on the side wall of the dam body to fix the settlement meter easily affects integrity and strength of the dam body and service life of the dam body. Meanwhile, the settlement gauge in the prior art has some defects, namely, the observation result is greatly influenced by the interference of environmental factors such as air pressure, temperature and the like; secondly, the water-tube settlement gauge influences the strength and integrity of the dam body; thirdly, the construction is greatly disturbed; fourthly, the cost is higher. In addition, the durability of the water tube type settlement meter in the prior art is poor; the dam body settlement caused by the foundation settlement cannot be monitored, and the accuracy of the monitoring result is low.

Therefore, in order to solve these problems, the utility model provides a dam body settlement monitoring device.

Disclosure of Invention

The utility model aims at providing a dam body settlement monitoring device that influences dam body itself little, the durability is good, the monitoring is accurate.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that:

a dam body settlement monitoring device is characterized in that a plurality of monitoring grooves are formed in the upper surface of a dam body along the length direction of the dam body, and strain sensing optical fibers are fixed in the monitoring grooves; a layer of fixed layer is poured on the upper surface of the dam body; the strain sensing optical fibers are distributed in a U shape in the monitoring groove, two ends of each strain sensing optical fiber are connected with an optical fiber data acquisition and analysis system through optical cables, and the optical fiber data acquisition and analysis system is connected with an optical fiber data processing, analysis and display system through the optical cables; the upper surface of the fixed layer is fixed with a measuring plate, the measuring plate is evenly provided with scales, a laser generator is arranged outside the dam body, and a laser port of the laser generator is perpendicular to the measuring plate.

Preferably, the strain sensing optical fiber is sleeved with a rubber hose, and the outer wall of the strain sensing optical fiber is glued with the inner wall of the rubber hose.

Preferably, the outer wall of the rubber hose is provided with a spiral annular rib along the length direction of the rubber hose.

Preferably, the outer wall of the rubber hose is provided with a plurality of scratches which are distributed in a staggered mode.

Preferably, the height of the fixed layer is 1-2 m.

Preferably, an alarm is arranged in the optical fiber data processing, analyzing and displaying system.

The utility model discloses following beneficial effect has:

1. the utility model discloses in, it is accurate to carry out the monitoring result that monitors to dam body settlement through strain sensing optic fibre, and the monitoring result receives environmental factor's such as atmospheric pressure, temperature interference little.

2. The utility model discloses in, subside the monitoring devices who carries out the monitoring simple structure, simple to operate, with low costs, little to the construction influence through strain sensing optic fibre to the dam body, can not cause the influence to the integrality and the intensity of dam body itself, guarantee the life of dam body.

3. The utility model discloses in, laser generator and the setting of measuring the board can be monitored the dam body because of the whole settlement that the geology subsides the emergence, can read out the whole settlement volume that subsides of dam body through the scale mark on measuring the board.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of a strain sensing optical fiber;

FIG. 3 is a side view of a dam;

the labels in the figure are: 1-a dam body; 2-monitoring the tank; 3-a strain sensing optical fiber; 4-a fixing layer; 5-optical fiber data acquisition and analysis system; 6-optical fiber data processing, analyzing and displaying system; 7-measuring the plate; 8-graduation; 9-a laser generator; 10-a rubber hose; 11-a helical annular rib; 12-alarm.

Detailed Description

As shown in fig. 1-3, in the dam settlement monitoring device, a plurality of monitoring grooves 2 are formed in the upper surface of a dam 1 along the length direction of the dam 1, and strain sensing fibers 3 are fixed in the monitoring grooves 2; a fixing layer 4 is poured on the upper surface of the dam body 1, and the height of the fixing layer 4 is 1-2 m; the strain sensing optical fibers 3 are distributed in a U shape in the monitoring groove 2, two ends of each strain sensing optical fiber 3 are connected with an optical fiber data acquisition and analysis system 5 through optical cables, and the optical fiber data acquisition and analysis system 5 is connected with an optical fiber data processing, analysis and display system 6 through optical cables; the upper surface of the fixed layer 4 is fixed with a measuring plate 7, the measuring plate 7 is uniformly provided with scales 8, a laser generator 9 is arranged outside the dam body 1, and a laser port of the laser generator 9 is perpendicular to the measuring plate 7.

When the dam body 1 is built to a specified height, the monitoring grooves 2 are formed in the upper surface of the dam body 1, the bottom surfaces of the monitoring grooves 2 are cleaned, the strain sensing optical fibers 3 are laid in the monitoring grooves 2 in a U shape, and after the strain sensing optical fibers 3 are laid, a layer of fixing layer 4 is formed by continuously pouring into the monitoring grooves 2 and the surface of the dam body 1, so that the fixing layer 4 and the dam body 1 are integrated. In the prior art, although the dam settlement is detected through the strain sensing optical fiber, in the prior art, the strain sensing optical fiber is adhered to the section steel and the section steel is buried in the monitoring ditch. And when the dam body is settled, the profile steel deforms along with the settlement of the dam body, so that the strain sensing optical fiber on the profile steel is subjected to strain and deformation, and the settlement deformation amount inside the dam body is calculated according to the strain and deformation data of the strain sensing optical fiber. However, the profile steel has certain strength and bending resistance, and when the internal of the dam body is subjected to settlement deformation, the profile steel cannot be deformed or the deformation of the profile steel is not consistent with the settlement deformation of the internal of the dam body, so that the settlement monitoring result of the dam body is inaccurate. Therefore, in the application, the strain sensing optical fiber 3 is directly formed integrally with the dam body 1 through pouring, so that the deformation synchronism of the strain sensing optical fiber 3 and the dam body 1 can be ensured, the sedimentation of the strain sensing optical fiber 3 on the dam body 1 is synchronously lifted or compressed, the sedimentation amount of the dam body 1 is measured by calculating the deformation amount of the strain sensing optical fiber 3, and the accuracy of the detection result of the dam body 1 is ensured. In this embodiment, the optical fiber data collecting and analyzing system 5 is an optical fiber detecting instrument, and measures the installed and embedded strain sensing optical fiber 3 through the optical fiber detecting instrument to reflect the strain and deformation data of the strain sensing optical fiber 3, thereby realizing automatic measurement. The optical fiber detection instrument transmits the measured data to the optical fiber data processing, analyzing and displaying system 6, the optical fiber data processing, analyzing and displaying system 6 is a computer, and the received measured data is processed, analyzed and displayed through the computer, so that workers can visually master the settlement data of the dam body 1 conveniently.

Meanwhile, the structure for monitoring the dam body 1 settlement through the strain sensing optical fiber 3 in the prior art can only monitor the internal deformation and settlement of the dam body 1, but cannot monitor the settlement of the whole dam body 1 settlement caused by foundation settlement. Therefore, in order to solve this problem, fixed layer 4 upper surface has fixed measuring plate 7 of taking scale 8 in this embodiment, sets up laser generator 9 outside dam 1, and laser generator 9 sets up in keeping away from dam 1 department, and the foundation that dam 1 foundation subsides and to laser generator 9 place influences for a short time, guarantees that dam 1 foundation subsides and can not arouse the subsidence of laser generator 9. The laser generator 9 emits laser to the measuring plate 7, and the position of the laser on the measuring plate 7 is read to obtain the integral settlement of the dam body 1. Therefore, the present embodiment can detect the settlement amount of the entire dam 1 due to the foundation settlement.

As a further description of the above embodiment, the strain sensing optical fiber 3 is sleeved with a rubber hose 10, and the outer wall of the strain sensing optical fiber 3 is glued to the inner wall of the rubber hose 10.

When the strain sensing optical fiber measuring device is used in the embodiment, the strain sensing optical fiber 3 is sleeved with the rubber hose 10, so that the strain sensing optical fiber 3 can be protected, the strain sensing optical fiber 3 is prevented from being deformed due to external force in a pouring process, and the measuring accuracy of the strain sensing optical fiber 3 is ensured. Meanwhile, the arrangement of the rubber hose 10 can also play a role in protecting the strain sensing optical fiber 3, prevent the strain sensing optical fiber 3 from being damaged by impurities or other substances in cement paste, and prolong the service life of the strain sensing optical fiber 3. In addition, the outer wall of the strain sensing optical fiber 3 is connected with the inner wall of the rubber hose 10 in an adhesive manner, so that the deformation synchronism of the strain sensing optical fiber 3 and the rubber hose 10 can be ensured, and the strain sensing pipeline is prevented from sliding in the rubber hose 10 and not deforming along with the deformation of the rubber hose 10, so that the accuracy of a detection result is influenced. Therefore, the embodiment can not only protect the strain sensing optical fiber 3, but also prolong the service life of the strain sensing optical fiber 3; the consistency of the sedimentation deformation of the strain sensing optical fiber 3 and the dam body 1 can be ensured, and the accuracy of the detection result is ensured.

As a further description of the above embodiment, the outer wall of the rubber hose 10 is provided with a spiral annular rib 11 along the length direction of the rubber hose 10.

When the dam body settlement monitoring device is used in the embodiment, the contact area between the rubber hose 10 and the pouring cement slurry can be increased due to the arrangement of the spiral annular ribs 11 on the outer side of the rubber hose 10, the firmness of bonding between the rubber hose 10 and the dam body 1 is guaranteed, the phenomenon that the rubber hose 10 and the dam body 1 fall off along with the time extension and cannot be deformed along with the settlement of the dam body 1 to cause synchronous change is avoided, and therefore the settlement of the dam body 1 cannot be accurately monitored. Therefore, the present embodiment can ensure the integrity between the rubber hose 10 and the dam 1, and ensure the synchronism of the sedimentation deformation of the strain sensing optical fiber 3 and the dam 1, thereby ensuring the accuracy of the sedimentation monitoring of the dam 1.

As a further description of the above embodiment, the outer wall of the rubber hose 10 has a plurality of scratches which are distributed in a staggered manner.

When this embodiment uses, the setting of mar can further increase the fastness between rubber hose 10 and the dam body 1 to further guarantee the wholeness between rubber hose 10 and the dam body 1, guarantee the synchronism of strain sensing optical fiber 3 and the dam body 1 settlement deformation, thereby guarantee the accuracy of dam body 1 settlement monitoring.

As a further description of the above embodiment, an alarm 12 is provided within the fiber optic data processing, analysis and display system 6.

When the dam settlement monitoring system is used in the embodiment, the settlement threshold value of the dam body 1 is arranged in the optical fiber data processing, analyzing and displaying system 6, and when the settlement amount of the dam body 1 is larger than the threshold value, the alarm 12 gives an alarm to remind a worker to perform corresponding processing in time.

It is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention, and are not intended to indicate or imply that the claimed components or mechanisms must be in a particular orientation, constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a dam body settlement monitoring devices which characterized in that: the upper surface of the dam body (1) is provided with a plurality of monitoring grooves (2) along the length direction of the dam body (1), and strain sensing optical fibers (3) are fixed in the monitoring grooves (2); a layer of fixed layer (4) is poured on the upper surface of the dam body (1); the strain sensing optical fibers (3) are distributed in the monitoring groove (2) in a U shape, two ends of each strain sensing optical fiber (3) are connected into an optical fiber data acquisition and analysis system (5) through optical cables, and the optical fiber data acquisition and analysis system (5) is connected into an optical fiber data processing, analysis and display system (6) through optical cables; the dam is characterized in that a measuring plate (7) is fixed on the upper surface of the fixing layer (4), scales (8) are uniformly arranged on the measuring plate (7), a laser generator (9) is arranged outside the dam body (1), and a laser port of the laser generator (9) is perpendicular to the measuring plate (7).

2. The dam settlement monitoring device of claim 1, wherein: the strain sensing optical fiber (3) is sleeved with a rubber hose (10), and the outer wall of the strain sensing optical fiber (3) is connected with the inner wall of the rubber hose (10) in an adhesive mode.

3. The dam settlement monitoring device of claim 2, wherein: the outer wall of the rubber hose (10) is provided with a spiral annular rib (11) along the length direction of the rubber hose (10).

4. The dam settlement monitoring device of claim 2, wherein: the outer wall of the rubber hose (10) is provided with a plurality of scratches which are distributed in a staggered mode.

5. The dam settlement monitoring device of claim 1, wherein: the height of the fixed layer (4) is 1-2 m.

6. The dam settlement monitoring device of claim 1, wherein: an alarm (12) is arranged in the optical fiber data processing, analyzing and displaying system (6).