CN216954556U - Distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring - Google Patents
Distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring Download PDFInfo
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- CN216954556U CN216954556U CN202122260931.3U CN202122260931U CN216954556U CN 216954556 U CN216954556 U CN 216954556U CN 202122260931 U CN202122260931 U CN 202122260931U CN 216954556 U CN216954556 U CN 216954556U
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Abstract
A distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring belongs to the technical field of pile foundation monitoring. The steering positioner comprises a connecting rod and two fixing plates, the two fixing plates are coaxially fixed at two ends of the connecting rod, the protective sleeve is sleeved on the outer side of the optical fiber, the outer wall of the protective sleeve is attached to the side wall of the connecting rod, and the two fixing plates are arranged on two sides of the pile foundation vertical reinforcing steel bar and attached to the side wall of the connecting rod during use. The utility model solves the problems of high laying difficulty and easy construction damage of the distributed Brillouin sensing optical fiber for monitoring the pile foundation, can effectively protect the optical fiber, reduces the damage to the optical fiber in the construction process, ensures the continuity of the optical fiber and improves the effectiveness of monitoring the pile foundation.
Description
Technical Field
The utility model relates to a distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring, and belongs to the technical field of pile foundation monitoring.
Background
With the continuous development of bridge construction in China, the importance degree of a bridge structure in a transportation network is continuously increased, the safety of the bridge structure plays an important role in guaranteeing the high efficiency and safe operation of the transportation network, and a bridge pile foundation structure serving as a main bearing structure of the bridge structure is a key structure influencing the operation safety of the bridge. Therefore, a technology for integrally monitoring the pile foundation of the bridge structure deeply buried underground for a long distance and a long time is urgently needed, so that the monitoring and early warning of the operation safety of the bridge structure are realized.
The distributed Brillouin sensing optical fiber is a structural response monitoring sensing device taking optical signals as media, has the functions of transmission and monitoring, can continuously collect structural response in space and time, has strong anti-interference capability and can be buried in a concrete structure, and is very suitable for monitoring a bridge structure pile foundation.
In the construction process of the pile foundation, the distributed Brillouin optical fiber needs to be arranged in a pile foundation reinforcement cage, and the optical fiber is poured into pile foundation concrete, so that the operation state of the pile foundation is monitored. Because the distributed Brillouin sensing optical fiber utilizes an optical signal as a medium for measuring structural response information, the optical fiber is required to be ensured to be a continuous closed loop and not to be interrupted in the arrangement process, the distributed Brillouin sensing optical fiber along the central line direction of the pile foundation is usually directly arranged on a main reinforcing steel bar of the pile foundation, the distributed Brillouin sensing optical fiber is not easily damaged in the construction process of the part, but a section of optical fiber transversely arranged exists for the return-type upward arranged optical fiber at the bottom of the pile foundation, the part belongs to a part which is easy to damage, if the protection of the distributed Brillouin sensing optical fiber of the part is not enhanced, the damage to the part of optical fiber is easily caused in the construction process, and therefore the whole distributed Brillouin sensing optical fiber system cannot normally work and cannot effectively monitor the stress state of the pile foundation. However, there is no protection device for the above problems in the current construction, so there is an urgent need for a distributed brillouin sensing optical fiber layout protection device for pile foundation monitoring.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the utility model provides a distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring.
The utility model adopts the following technical scheme: a distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring comprises a steering positioner and a protection sleeve; the steering positioner comprises a connecting rod and two fixing plates, the two fixing plates are coaxially fixed at two ends of the connecting rod, the protecting sleeve is sleeved on the outer side of the optical fiber, the outer wall of the protecting sleeve is attached to the side wall of the connecting rod, and during use, the two fixing plates are arranged on two sides of the vertical steel bar of the pile foundation and attached to the side wall of the connecting rod and the side wall of the vertical steel bar of the pile foundation.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model solves the problems that the distributed Brillouin sensing optical fiber for pile foundation monitoring is difficult to lay and is easy to damage by construction, can effectively protect the optical fiber, reduce the damage to the optical fiber in the construction process, ensure the continuity of the optical fiber and improve the effectiveness of the pile foundation monitoring;
2. the steering positioner can prevent the problems of easy breakage and small bending angle in optical fiber steering, reduce the damage in the optical fiber information transmission process and protect the effectiveness of optical fiber information transmission;
3. the protective casing can reduce the damage of concrete pouring vibration to the distributed Brillouin sensing optical fiber in the construction process, and can prevent overlarge local stress caused by local deformation of the distributed Brillouin sensing optical fiber;
4. the foaming material can fix the distributed Brillouin sensing optical fiber in the protective sleeve, and prevent the distributed Brillouin sensing optical fiber from being damaged due to dislocation with the protective sleeve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the steering positioner;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a reference view of the present invention in use, and fig. 7 is a pile foundation stirrup;
fig. 5 is a schematic view of the installation of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
A distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring comprises a steering positioner 2 and a protection casing 3; turn to locator 2 and include connecting rod 8 and two fixed plates 9, two fixed plates 9 coaxial fixations are at the both ends of connecting rod 8, 3 suits of protective casing are in the outside of optic fibre 1 to the outer wall of protective casing 3 and the lateral wall laminating of connecting rod 8, during the use, two fixed plates 9 set up in the both sides of pile foundation vertical reinforcement 6, and connect the lateral wall of pole 8 and the lateral wall laminating of pile foundation vertical reinforcement 6.
The steering positioner 2 limits the protective sleeve 3 to the pile foundation steel bar net, the steering positioner 2 is processed into a steering gear by adopting steel, and the protective sleeve 3 is a steel wire mesh framework plastic composite pipe.
The optical fiber 1 is arranged in the protective sleeve 3, so that the damage of concrete pouring and vibrating to the optical fiber 1 in the construction process is reduced, and the local stress caused by local deformation of the optical fiber 1 is prevented from being too large;
through turning to the protective casing 3 restriction and pile foundation reinforcing bar net that locator 2 will wrap up optic fibre 1, prevent that concrete placement from causing optic fibre 1 department of buckling to damage in the work progress.
A plurality of positioning rings 4 are uniformly distributed in the protective sleeve 3 along the axial direction of the protective sleeve, the positioning rings 4 are sleeved on the outer side of the optical fiber 1, the outer wall of each positioning ring 4 is connected with the inner wall of the protective sleeve 3, and the positioning rings 4 are made of cement.
And a foaming material 5 is filled between every two adjacent positioning rings 4 in the protective sleeve 3, and the foaming material 5 adopts a polyurethane foaming agent.
The positioning ring 4 and the foaming material 5 can fix the optical fiber 1 in the protective sleeve 3, so that the optical fiber 1 and the protective sleeve 3 are prevented from being damaged due to dislocation.
The lateral wall of connecting rod 8 is equipped with the standing groove 10 that matches with pile foundation vertical reinforcement 6, increase and pile foundation vertical reinforcement 6's area of contact, improves the stability of connecting.
8 one end lateral wall of connecting rod is equipped with draw-in groove 11 that runs through its terminal surface along its circumference, and during the use, protection sleeve 3 is placed in draw-in groove 11, avoid protecting sleeve 3 in the use to move indiscriminately, improve the stability of using.
The construction steps of the utility model are as follows:
the method comprises the following steps: stretching the optical fiber 1 at the position needing bending into the protective sleeve 3;
step two: respectively placing a steering positioner 2 at two ends of a protective sleeve 3;
step three: attaching the two steering positioners 2 to the corresponding pile foundation vertical steel bars 6 respectively;
step four: arranging the part of the optical fiber 1 which is not sleeved with the protective sleeve 3 along the axial direction of the pile foundation vertical steel bar 6;
step five: fixing the steering positioner 2 and the protective sleeve 3 in the pile foundation reinforcing mesh by using iron wires;
step six: and (5) pouring concrete.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a pile foundation monitoring is with distributed brillouin sensing optical fiber laying protection device which characterized in that: comprises a steering positioner (2) and a protective sleeve (3); turn to locator (2) including connecting rod (8) and two fixed plates (9), two fixed plates (9) coaxial fixation are at the both ends of connecting rod (8), protective casing (3) suit is in the outside of optic fibre (1) to the lateral wall laminating of the outer wall of protective casing (3) and connecting rod (8), during the use, two fixed plates (9) set up the both sides at pile foundation vertical reinforcement (6), and the lateral wall laminating of the lateral wall of connecting rod (8) and pile foundation vertical reinforcement (6).
2. The distributed Brillouin sensing optical fiber arrangement protection device for pile foundation monitoring according to claim 1, wherein: be equipped with a plurality of holding rings (4) in protection sleeve (3), holding ring (4) suit is in the outside of optic fibre (1) to the outer wall of holding ring (4) and the inner wall connection of protection sleeve (3).
3. The distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring according to claim 2, wherein: and a foaming material (5) is filled between every two adjacent positioning rings (4) in the protective sleeve (3).
4. The distributed Brillouin sensing optical fiber arrangement protection device for pile foundation monitoring according to claim 1 or 3, wherein: the lateral wall of connecting rod (8) is equipped with standing groove (10) with pile foundation vertical reinforcement (6) matching.
5. The distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring according to claim 4, wherein: and a clamping groove (11) is formed in the side wall of one end of the connecting rod (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260931.3U CN216954556U (en) | 2021-09-17 | 2021-09-17 | Distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122260931.3U CN216954556U (en) | 2021-09-17 | 2021-09-17 | Distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216954556U true CN216954556U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122260931.3U Active CN216954556U (en) | 2021-09-17 | 2021-09-17 | Distributed Brillouin sensing optical fiber layout protection device for pile foundation monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216954556U (en) |
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2021
- 2021-09-17 CN CN202122260931.3U patent/CN216954556U/en active Active
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