CN214471536U

CN214471536U - Culvert seam leakage monitoring system

Info

Publication number: CN214471536U
Application number: CN202120011556.6U
Authority: CN
Inventors: 赵津磊; 王铁力; 王海俊
Original assignee: Jiangsu Surveying And Design Institute Of Water Resources Co ltd
Current assignee: Jiangsu Surveying And Design Institute Of Water Resources Co ltd
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-10-22
Anticipated expiration: 2031-01-04

Abstract

The utility model relates to a culvert seam seepage monitoring system belongs to culvert structure technical field, and its technical scheme includes weak permeable bed, strong permeable bed, optical fiber layer and temperature sensor, weak permeable bed sets up the seam outside between adjacent culvert body, strong permeable bed set up in culvert body bottom just is located the seam with between the weak permeable bed, the optical fiber layer is laid in strong permeable bed is inboard, temperature sensor with the optical fiber layer is connected, temperature sensor is based on the monitoring of optical fiber layer the temperature variation of strong permeable bed. By adopting the technical scheme, the culvert can monitor the leakage condition of the joint of the culvert body in real time in the water conveying and draining process, and the threat to the safety of the dam is avoided.

Description

Culvert seam leakage monitoring system

Technical Field

The utility model belongs to the technical field of the culvert structure, concretely relates to culvert seam seepage monitoring system.

Background

Culverts are a common water conveying and draining structure in hydraulic engineering and are commonly used in some embankment engineering. The culvert is generally buried in the interior of the dike and is formed by splicing a plurality of sections of the culvert body with certain length. The leakage problem of the seam between the adjacent hole body sections is a common disease of the type of engineering.

As the culvert is generally buried in the dike, most of the tunnel bodies are invisible, and seams among the tunnel bodies are highly concealed, the leakage condition of the seams of the tunnel bodies is difficult to find. If the leakage problem cannot be found in time, the safety of the embankment can be seriously threatened. There is therefore a great need for a culvert seam leak monitoring system.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the above-mentioned prior art, the utility model aims to provide a culvert seam leakage monitoring system, the culvert can be in real time to the seepage condition real-time supervision of culvert body seam crossing at the defeated drainage in-process, avoids constituting the threat to the safety of dykes and dams.

In order to realize the purpose of the utility model, the utility model provides a technical scheme as follows:

the utility model provides a culvert seam seepage monitoring system, includes weak permeable bed, strong permeable bed, optic fibre layer and temperature sensor, weak permeable bed sets up in the seam outside between adjacent culvert body, strong permeable bed set up in culvert body bottom just is located the seam with between the weak permeable bed, the optic fibre layer is laid in strong permeable bed inboard, temperature sensor with the optic fibre layer is connected, temperature sensor is based on the monitoring of optic fibre layer the temperature variation of strong permeable bed.

Preferably, the optical fiber layer comprises optical fibers which are flatly laid in an arch shape, and the temperature measuring sensor is connected with the tail ends of the optical fibers.

Preferably, the temperature sensor is a distributed optical fiber temperature sensor.

Preferably, the weak permeable layer is arranged around the outer side of the culvert body and seals the seam.

Preferably, the width value of the strong permeable layer along the direction vertical to the water flow is greater than or equal to the width value of the vertical projection of the culvert body.

Preferably, the length of the layer in the direction of water flow is greater than or equal to 50 cm.

Preferably, the length of the optical fiber within the permeable layer is greater than or equal to 5 m.

Preferably, the thickness of the weakly permeable layer is greater than or equal to 20 cm; the compaction degree of the weak permeable layer at the bottom of the culvert body is more than or equal to 0.95.

The utility model provides a culvert seam seepage monitoring system, through the weak permeable bed of laying, strong permeable bed, optic fibre layer and temperature transducer, can the leakage condition of real-time supervision culvert body seam crossing, simultaneously, carry out the antiseep to the percolating water position and handle, when taking place the seepage phenomenon, can in time monitor the seepage phenomenon of culvert body seam crossing, and then avoided the emergence of incident. In addition, this structural design is simple, and the required equipment volume of monitoring is few, easily promotes.

Drawings

Fig. 1 is a schematic structural view of a culvert seam leakage monitoring system of the present invention;

fig. 2 is a schematic view of a connecting structure of a strong permeable layer and a culvert seam in the culvert seam leakage monitoring system of the present invention;

fig. 3 is a schematic diagram of a protruding optical fiber layer in a culvert seam leakage monitoring system according to the present invention;

figure 4 is the utility model discloses a section view of outstanding culvert body among culvert seam seepage monitoring system.

Reference numbers in the figures:

100. a weakly water permeable layer; 200. a strongly water permeable layer; 300. an optical fiber layer; 400. a temperature measuring sensor; 500. the culvert body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

The utility model provides a culvert seam seepage monitoring system, see figure 1-figure 4, including the weakly permeable bed 100, the weakly permeable bed 200, optical fiber layer 300 and temperature sensor 400, wherein, the weakly permeable bed 100 sets up in the outside of seam between adjacent culvert hole body 500, and the weakly permeable bed 200 sets up in culvert hole body 500 bottom and is located between seam and the weakly permeable bed 100, and optical fiber layer 300 lays in the strongly permeable bed 200 inboardly, and temperature sensor 400 is connected with optical fiber layer 300, and temperature sensor 400 monitors the temperature variation of the strongly permeable bed 200 based on optical fiber layer 300. After the construction is accomplished, play the antiseep effect through the weak permeable layer 100 that sets up, when culvert hole body 500 seam crossing produced the seepage phenomenon, the percolating water can flow to strong permeable layer 200 in along the gap to arouse the change of strong permeable layer 200 temperature, at this moment, temperature measurement sensor 400 can the inside temperature variation of real-time supervision strong permeable layer 200 based on the inside fiber layer 300 of strong permeable layer 200, and then whether there is water leakage in indirect monitoring culvert hole body 500 seam crossing. Through the scheme, in the using process, when leakage occurs, the leakage can be monitored before the dyke safety is threatened by the leakage water.

In particular, the weakly permeable layer 100 is composed of a weakly permeable material, wherein the weakly permeable material may have a water permeability coefficient of less than 10^-6clay in cm/s. The layer 200 is made of a material that is permeable to water, which may have a permeability coefficient greater than 10^-3cm/s sandy soil. The purpose of the weakly permeable layer 100 is to prevent the inside seepage field of the external soil body of the culvert tunnel body 500 from affecting the monitoring result, and the purpose of the strongly permeable layer 200 is to change the internal temperature value thereof by permeating water, based on the temperature value to monitor the seam seepage of the culvert tunnel body 500, therefore, the weakly permeable layer 100 and the strongly permeable layer 200 are not limited herein on the premise of satisfying the above functions.

The weakly permeable layer 100 is disposed around the outside of the culvert body 500 and seals the joints of the culvert body 500. Through the weakly permeable layer 100 arranged in a surrounding manner, the influence of the internal seepage field of the soil outside the culvert body 500 on the monitoring result can be prevented in the using process.

The thickness of the weakly permeable layer 100 is greater than or equal to 20 cm; the thickness of the aquitard 200 may be set to one half of the aquitard 100, and the aquitard 100 may then wrap the aquitard 200.

In the construction process, in order to ensure the overall strength, stability and durability around the culvert, the degree of compaction of the weakly permeable layer 100 at the bottom of the culvert body 500 is greater than or equal to 0.95.

The width value of the strong permeable layer 200 along the direction vertical to the water flow is greater than or equal to the width value of the vertical projection of the culvert body 500. The length of the highly permeable layer 200 in the direction of water flow has a value of 50cm or more. Because the outside parcel of strong permeable bed 200 has weak permeable bed 100, sets up the width value of strong permeable bed 200 into the width value that is greater than culvert tunnel body 500, when the seepage took place for culvert tunnel body 500 seam, the percolating water can flow to inside the strong permeable bed 200 to, when taking place the seepage, can guarantee the timeliness and the accuracy of monitoring.

It should be noted that the water flow direction refers to a direction in which water flows along the culvert body 500, and in general, water flows from one end of the culvert body 500 to the other end.

The temperature measuring sensor 400 is a distributed optical fiber temperature measuring sensor capable of monitoring the temperature change of the highly permeable layer 200 based on the optical fiber layer 300.

The optical fiber layer 300 includes optical fibers laid in a "bow" shape, and the temperature sensor 400 is connected to the end of the optical fibers, wherein the length of the optical fibers inside the highly permeable layer 200 is greater than or equal to 5 m. Be "bow" shape through setting up optic fibre, and the length value that optic fibre layer 300 is located strong permeable bed 200 inside is more than or equal to 5m, can improve distributed optical fiber temperature sensor's resolution ratio, area of contact between increase optic fibre and the strong permeable bed 200, and then improve the rate of accuracy of distributed optical fiber temperature sensor monitoring, and simultaneously, owing to be "bow" nature distribution in strong permeable bed 200, when the temperature variation appears in the inside arbitrary position of strong permeable bed 200, distributed optical fiber temperature sensor all can be timely, the accurate temperature value of monitoring corresponding position, and then can guarantee timeliness and the accuracy to culvert body 500 seam crossing seepage phenomenon monitoring.

During construction, the culvert is excavated along the planned design route, and foundation treatment is carried out if necessary, so that the phenomenon of uneven settlement is avoided. The weakly permeable layers 100 are laid at the bottoms of the culvert bodies 500, the strongly permeable layers 200 are laid on the upper sides of the weakly permeable layers 100, and the weakly permeable layers 100 and the strongly permeable layers 200 are located at the joint positions of the culvert bodies 500. In the process of laying the highly permeable layer 200, the optical fiber layer 300 is laid in the highly permeable layer 200, wherein the relative density of the highly permeable layer 200 is not less than 0.65. After the highly permeable layer 200 is laid, a culvert body 500 structure is poured or a prefabricated tunnel body structure is hung on the upper side. Then weak permeable layers 100 are laid on the two sides and the top of the culvert, and finally earthwork backfilling is carried out on the two sides and the top of the tunnel body.

In the use, when the culvert body 500 seam position produced the seepage phenomenon, the seepage water can flow into inside the highly permeable layer 200, and then arouse the inside temperature variation of highly permeable layer 200, monitors the change of this temperature through temperature measurement sensor 400 in real time, and then monitors the seepage phenomenon of culvert body 500 seam.

The utility model provides a culvert seam seepage monitoring system, through the weak permeable bed 100 of laying, strong permeable bed 200, optic fibre layer 300 and temperature sensor 400, can the leakage condition of 500 seams of culvert body of real-time supervision, when taking place the leakage phenomenon, can in time monitor the leakage phenomenon of 500 seams of culvert body, and then avoided the emergence of incident. In addition, this structural design is simple, and the required equipment volume of monitoring is few, easily promotes.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

Claims

1. The culvert seam leakage monitoring system is characterized by comprising a weakly permeable layer (100), a strongly permeable layer (200), an optical fiber layer (300) and a temperature measuring sensor (400), wherein the weakly permeable layer (100) is arranged on the outer side of a seam between adjacent culvert bodies (500), the strongly permeable layer (200) is arranged at the bottom of each culvert body (500) and is positioned between the seam and the weakly permeable layer (100), the optical fiber layer (300) is laid on the inner side of the strongly permeable layer (200), the temperature measuring sensor (400) is connected with the optical fiber layer (300), and the temperature measuring sensor (400) is based on the optical fiber layer (300) for monitoring the temperature change of the strongly permeable layer (200).

2. The culvert seam leakage monitoring system of claim 1, wherein the optical fiber layer (300) comprises optical fibers laid in a bow shape, and the temperature measuring sensor (400) is connected with the tail ends of the optical fibers.

3. The culvert seam leakage monitoring system according to claim 1 or 2, characterized in that the temperature sensor (400) is a distributed optical fiber temperature sensor.

4. The culvert seam leakage monitoring system of claim 1, characterized in that the water-impermeable layer (100) is arranged around the outside of the culvert body (500) and closes the seam.

5. The culvert seam leakage monitoring system of claim 1, characterized in that the width of the highly permeable layer (200) along the vertical water flow direction is greater than or equal to the width of the vertical projection of the culvert body (500).

6. The culvert seam leakage monitoring system of claim 1, characterized in that the length value of the highly permeable layer (200) in the water flow direction is greater than or equal to 50 cm.

7. The culvert seam leakage monitoring system of claim 2, wherein the length of the optical fiber positioned in the water permeable layer has a value greater than or equal to 5 m.

8. Culvert seam leakage monitoring system according to claim 1, characterized in that the thickness of the water-weakly permeable layer (100) is greater than or equal to 20 cm; the compaction degree of the weak permeable layer (100) at the bottom of the culvert body (500) is more than or equal to 0.95.