CN211080237U - Concrete anti-cracking device based on distributed optical fiber - Google Patents
Concrete anti-cracking device based on distributed optical fiber Download PDFInfo
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- CN211080237U CN211080237U CN201921547028.1U CN201921547028U CN211080237U CN 211080237 U CN211080237 U CN 211080237U CN 201921547028 U CN201921547028 U CN 201921547028U CN 211080237 U CN211080237 U CN 211080237U
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Abstract
The utility model provides a concrete crack resistance device based on distributed optical fibers, which comprises a plurality of heating type distributed temperature measurement optical fibers which are arranged on the upper surface and the lower surface of the concrete at intervals; a plurality of distributed temperature measuring optical fibers arranged at the middle part of the concrete at intervals; a plurality of distributed stress-strain measuring optical fibers which are arranged at intervals on the upper surface, the lower surface and the middle part of the concrete; the DTS acquisition instrument is respectively connected with each heating type distributed temperature measurement optical fiber and each distributed temperature measurement optical fiber; survey stress strain optical fiber connection's BOTDR collection appearance with each distributing type respectively, the utility model discloses can be in real time, reliably gather the temperature and stress in the concrete, the inside stress variation of real-time supervision concrete, follow-up can be based on the temperature and the inside difference in temperature of stress regulation and control concrete in the concrete of gathering, reduce concrete self temperature stress, can effectively prevent because the crack of temperature stress production has improved construction quality and security.
Description
Technical Field
The utility model relates to a concrete anti-cracking device based on distributed optical fiber.
Background
The modern buildings often involve mass concrete construction, such as high-rise building foundations, large equipment foundations, water conservancy dams and the like. It features large volume, small surface coefficient, concentrated heat release of cement hydration, quick internal temp. rise, etc. When the temperature difference between the inside and the outside of the concrete is large, the concrete can generate temperature cracks, and the structural safety and the normal use are influenced. The traditional method for controlling the large-volume concrete cracks comprises the steps of reducing the hydration heat of the concrete, measuring the temperature at fixed points, paving heat-insulating materials and the like, and has the defects of poor quality control capability, insufficient capability of comprehensively controlling the temperature difference of the concrete, incapability of predicting the occurrence of the cracks in advance and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a concrete anti-cracking device based on distributing type optic fibre.
In order to solve the above problem, the utility model provides an anti device that splits of concrete based on distributed optical fiber, include:
a plurality of heating type distributed temperature measuring optical fibers which are arranged on the upper surface and the lower surface of the concrete at intervals;
a plurality of distributed temperature measuring optical fibers arranged at the middle part of the concrete at intervals;
a plurality of distributed stress-strain measuring optical fibers which are arranged at intervals on the upper surface, the lower surface and the middle part of the concrete;
the DTS acquisition instrument is respectively connected with each heating type distributed temperature measurement optical fiber and each distributed temperature measurement optical fiber;
and the BOTDR acquisition instrument is respectively connected with each distributed stress strain measurement optical fiber.
Further, in the above method, each heating type distributed temperature measuring optical fiber is in a U shape; each distributed temperature measuring optical fiber is U-shaped; each distributed stress-strain measuring optical fiber is U-shaped.
Further, in the method, the heating type distributed temperature measuring optical fibers are horizontally spaced from each other by 500mm to 1000mm, and the heating type distributed temperature measuring optical fibers are 100mm to 150mm away from the lower surface of the concrete or 100mm to 150mm away from the upper surface of the concrete.
Further, in the method, the distributed temperature measuring fibers are horizontally spaced from each other by 500mm to 1000mm, and the heating type distributed temperature measuring fibers and the distributed temperature measuring fibers are spaced from each other.
Furthermore, in the method, the distributed stress-strain measuring optical fibers are horizontally spaced from each other by 500mm to 1500mm and are arranged in layers according to the thickness of the concrete.
Further, in the above method, the stress-strain measuring fiber and the distributed temperature measuring fiber or the heating distributed temperature measuring fiber are arranged at intervals.
Further, in the above method, the heating type distributed temperature measurement optical fiber includes a temperature measurement optical fiber and a first protective layer coated outside the temperature measurement optical fiber;
the distributed stress-strain measuring optical fiber comprises a stress-strain measuring optical fiber and a fourth protective layer coated outside the stress-strain measuring optical fiber.
Further, in the above method, the distributed thermometry optical fiber comprises:
a temperature measuring optical fiber;
the protective coating is coated outside the temperature measuring optical fiber;
heating wires distributed around the temperature measuring optical fibers;
the second protective layer is coated outside the protective coating and the heating wire;
the metal armor is coated outside the second protective layer;
a third protective layer coated outside the metal armor
Compared with the prior art, the utility model discloses can be in real time, reliably gather temperature and stress in the concrete, the inside stress of real-time supervision concrete changes, and follow-up temperature and the inside difference in temperature of stress regulation and control concrete in can be based on the concrete of gathering reduces concrete self temperature stress, can effectively prevent because the crack that temperature stress produced has improved construction quality and security.
Drawings
Fig. 1 is a schematic view illustrating an optical fiber arrangement of a distributed optical fiber-based concrete crack-resistant apparatus according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional layout view of a distributed optical fiber-based concrete crack-resistant device according to an embodiment of the present invention;
fig. 3 is a schematic view of a monitoring system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a distributed thermometric optical fiber according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a thermal distributed thermometry optical fiber according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a distributed stress-strain measuring optical fiber according to an embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model provides a concrete anti-crack device based on distributed optical fiber, include:
a plurality of heating type distributed temperature measuring optical fibers which are arranged on the upper surface and the lower surface of the concrete at intervals;
a plurality of distributed temperature measuring optical fibers arranged at the middle part of the concrete at intervals;
the distributed temperature measuring optical fiber is different from a heating type distributed temperature measuring optical fiber, wherein the distributed temperature measuring optical fiber is a non-heating type distributed temperature measuring optical fiber;
a plurality of distributed stress-strain measuring optical fibers which are arranged at intervals on the upper surface, the lower surface and the middle part of the concrete;
the DTS acquisition instrument is respectively connected with each heating type distributed temperature measurement optical fiber and each distributed temperature measurement optical fiber;
and the BOTDR acquisition instrument is respectively connected with each distributed stress strain measurement optical fiber.
Here, the utility model discloses can be in real time, reliably gather temperature and stress in the concrete, the inside stress variation of real-time supervision concrete, follow-up temperature and the inside difference in temperature of stress regulation and control concrete in can being based on the concrete of gathering reduce concrete self temperature stress, can effectively prevent because the crack of temperature stress production has improved construction quality and security.
The utility model discloses a concrete anti-cracking device embodiment based on distributed optical fiber, every adds fever type distributing type temperature measurement optic fibre and is the U style of calligraphy.
The utility model discloses a concrete anti-cracking device embodiment based on distributed optical fiber, every distributed temperature measurement optic fibre is the U style of calligraphy.
The utility model discloses a concrete is anti in the device of splitting based on distributed optical fiber, every distributed stress-strain-measuring optic fibre is the U style of calligraphy in an embodiment.
The utility model discloses a concrete anti-cracking device embodiment based on distributed optical fiber, each adds the mutual horizontal interval 500mm ~ 1000mm of fever type distributed temperature measurement optic fibre, and each adds fever type distributed temperature measurement optic fibre apart from the lower surface 100mm ~ 150mm of concrete, or apart from the upper surface 100mm ~ 150mm of concrete.
Here, as shown in fig. 1 and 2, each of the heating type distributed temperature measuring fibers is U-shaped, each of the heating type distributed temperature measuring fibers is horizontally spaced from each other by 500mm to 1000mm, and each of the heating type distributed temperature measuring fibers is located 100mm to 150mm from a lower surface of the concrete or 100mm to 150mm from an upper surface of the concrete.
The distributed temperature measuring optical fibers are distributed in the middle of the precast concrete and used for measuring the central temperature of the large-volume concrete during hydration and heat release, and the heating distributed temperature measuring optical fibers are distributed on the upper surface and the lower surface of the concrete at intervals with the temperature measuring optical fibers.
The utility model discloses a concrete anti-cracking device embodiment based on distributed optical fiber, each distributed temperature measurement optic fibre is horizontal interval 500mm ~ 1000mm each other, adds fever type distributed temperature measurement optic fibre and distributed temperature measurement optic fibre interval distribution.
Here, as shown in fig. 1 and 2, the optical fibers are laid while the reinforcing bars are laid on the mass concrete, each distributed temperature measurement optical fiber is U-shaped, and each distributed temperature measurement optical fiber is horizontally spaced 500mm to 1000mm from each other and is arranged in the middle of the concrete. When the optical fiber is laid, the optical fiber is ensured to be fixed in position and marked, and the condition that the optical fiber is not moved in the pouring process and is not damaged is ensured.
The utility model discloses a concrete is anti splits device in one embodiment based on distributed optical fiber, each distributed stress-strain optical fiber of surveying, mutual horizontal interval 500mm ~ 1500mm, and the foundation the thickness layering of concrete is arranged.
Here, as shown in fig. 1 and 2, the stress-strain measuring fibers are U-shaped, are horizontally spaced from each other by 500mm to 1500mm, and are arranged in layers as needed according to the actual concrete thickness.
The utility model discloses a concrete anti-cracking device embodiment based on distributed optical fiber, survey stress strain optical fiber and distributed temperature measurement optic fibre or add fever type distributed temperature measurement optic fibre interval arrangement.
The stress-strain measuring optical fiber and the distributed temperature measuring optical fiber or the heating distributed temperature measuring optical fiber are arranged at intervals and are uniformly arranged in the middle, on the upper surface and on the lower surface of the concrete.
As shown in fig. 4, in an embodiment of the concrete crack-resistant device based on the distributed optical fiber of the present invention, the distributed temperature measurement optical fiber includes a temperature measurement optical fiber 11 and a first protection layer 12 coated outside the temperature measurement optical fiber.
As shown in fig. 5, in an embodiment of the concrete crack resistance device based on the distributed optical fiber of the present invention, the heating distributed temperature measuring optical fiber includes:
a temperature measuring optical fiber 21;
the protective coating 22 is coated outside the temperature measuring optical fiber 21;
a second protective layer 24 coated outside the protective coating 22 and the heating wire 23;
a metal sheath 25 coated on the outside of the second protective layer 24;
a third protective layer 26 covering the metal sheaths 25.
Here, the utility model discloses a distributed temperature measurement optic fibre makes heating efficiency the biggest and safe controllable under optic fibre does not receive the condition that external factor influenced.
As shown in fig. 6, in an embodiment of the concrete crack-resistant device based on the distributed optical fiber of the present invention, the distributed stress-strain measuring optical fiber includes a stress-strain measuring optical fiber 31 and a fourth protective layer 32 coated outside the stress-strain measuring optical fiber 32.
As shown in fig. 3, the utility model discloses a concrete crack resistance method adopts above-mentioned concrete crack resistance device based on distributed optical fiber, the method includes:
the intelligent integrated control system collects the temperature of the upper surface, the lower surface and the middle position of the concrete sequentially through the DTS collector and the distributed temperature measuring optical fiber;
when the temperature difference between the upper surface and the middle position of the concrete exceeds 5 ℃, the intelligent integrated control system controls the heating type distributed temperature measuring optical fiber to heat the temperature difference area of the concrete, meanwhile, the heating temperature is monitored through the heating type distributed temperature measuring optical fiber, and the temperature difference between the upper surface and the central temperature of the concrete is dynamically adjusted to be less than 5 ℃ through the heating type distributed temperature measuring optical fiber.
Herein, monitoring the temperature change of different areas of the concrete by adopting the optical fiber temperature measuring technology based on DTS (distributed optical fiber temperature measuring system) to perform temperature compensation in time comprises: the device comprises a DTS acquisition instrument, a heating type distributed temperature measurement optical fiber and a distributed temperature measurement optical fiber;
the method comprises the steps of monitoring the internal stress change of concrete in real time based on a BOTDR (Brillouin optical time domain reflection) optical fiber stress strain measurement technology, wherein the BOTDR optical fiber stress strain measurement technology comprises a BOTDR acquisition instrument and a distributed stress strain measurement optical fiber;
the utility model discloses an in the concrete crack resistance method embodiment, still include:
the intelligent integrated control system collects the stress inside the concrete sequentially through the BOTDR collector and the distributed stress-strain measuring optical fiber, and sends out corresponding alarm when the stress of a certain area inside the concrete is greater than a set value.
Herein, the BOTDR host computer monitors the change of stress and strain inside the concrete in real time, sends data to the intelligent control system, and when the stress of a certain area inside the concrete is greater than a set value (specifically referring to the concrete anti-cracking standard), the system sends out a corresponding alarm to the computer to prompt an operator that the stress of the corresponding area inside the concrete is too large, and takes effective measures to prevent the stress from further increasing.
The intelligent integrated control system based on the DTS (distributed optical fiber temperature measurement system) and the BOTDR (Brillouin optical time domain reflectometry) optical fiber technology comprises an integrated temperature monitoring and dynamic compensation function, a real-time temperature difference monitoring feedback function and a stress strain monitoring and alarming function.
The utility model discloses a scheme is more intelligent, can effectively regulate and control the inside difference in temperature of concrete in real time, reduces concrete self temperature stress, can also the inside stress variation of real-time supervision concrete, accomplishes the early warning in advance that the crack produced. The embedded distributed optical fiber system is used for monitoring and acquiring temperature and stress data in real time after concrete pouring, then intelligent analysis is carried out, temperature compensation is carried out in time, and a region with larger stress is displayed, so that cracks generated due to temperature stress can be effectively prevented, and the construction quality and safety are improved.
To sum up, the utility model has the advantages of as follows:
1. based on the DTS distributed optical fiber technology, the temperature distribution of different areas in the mass concrete can be comprehensively and accurately measured.
2. The heating type distributed optical fiber technology can quickly and effectively perform temperature compensation heating on a region with large temperature difference.
3. The heating temperature of each part of the concrete can be monitored in real time in the heating process of the heating type distributed optical fiber, the heating temperature is dynamically adjusted through feedback of the comprehensive control system, and the process is safe, efficient and controllable.
4. The internal stress of the mass concrete can be monitored in real time based on the BODTR distributed optical fiber technology.
5. The large-volume concrete is completed from pouring to maintenance, the system monitors the temperature difference and the stress inside the concrete in real time in the whole process, and the dynamic regulation and control compensates the area with larger temperature difference.
6. The crack early warning device has the function of early warning harmful cracks, and once local stress is abnormally increased, an alarm can be given in advance, and effective measures can be taken earlier to control the generation of the harmful cracks.
7. The optical fiber has low manufacturing cost, is not easily influenced by external factors, has the spatial resolution of 5-10 cm, the temperature measurement precision of 0.3 ℃, has negligible structural effect on large-volume concrete and has wide application conditions.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A concrete crack-resistant device based on distributed optical fibers is characterized by comprising:
a plurality of heating type distributed temperature measuring optical fibers which are arranged on the upper surface and the lower surface of the concrete at intervals;
a plurality of distributed temperature measuring optical fibers arranged at the middle part of the concrete at intervals;
a plurality of distributed stress-strain measuring optical fibers which are arranged at intervals on the upper surface, the lower surface and the middle part of the concrete;
the DTS acquisition instrument is respectively connected with each heating type distributed temperature measurement optical fiber and each distributed temperature measurement optical fiber;
and the BOTDR acquisition instrument is respectively connected with each distributed stress strain measurement optical fiber.
2. The distributed optical fiber-based concrete crack resistance device according to claim 1, wherein each heating-type distributed temperature measuring optical fiber is U-shaped; each distributed temperature measuring optical fiber is U-shaped; each distributed stress-strain measuring optical fiber is U-shaped.
3. The distributed optical fiber-based concrete crack resistance device according to claim 1, wherein each of the heating-type distributed temperature measuring optical fibers is horizontally spaced from each other by 500mm to 1000mm, and each of the heating-type distributed temperature measuring optical fibers is spaced from a lower surface of the concrete by 100mm to 150mm, or is spaced from an upper surface of the concrete by 100mm to 150 mm.
4. The distributed optical fiber-based concrete crack-resistant device according to claim 1, wherein the distributed temperature measuring optical fibers are horizontally spaced from each other by 500mm to 1000mm, and the heating-type distributed temperature measuring optical fibers and the distributed temperature measuring optical fibers are spaced apart.
5. The distributed optical fiber-based concrete crack resistance device according to claim 1, wherein the distributed stress-strain measuring optical fibers are horizontally spaced from each other by 500mm to 1500mm and are arranged in layers according to the thickness of the concrete.
6. The distributed optical fiber-based concrete crack resistance device according to claim 1, wherein the stress-strain measuring fiber is spaced apart from the distributed temperature measuring fiber or the heating-type distributed temperature measuring fiber.
7. The distributed optical fiber-based concrete crack-resistant device according to claim 1, wherein the heating-type distributed temperature measuring optical fiber comprises a temperature measuring optical fiber and a first protective layer coated outside the temperature measuring optical fiber;
the distributed stress-strain measuring optical fiber comprises a stress-strain measuring optical fiber and a fourth protective layer coated outside the stress-strain measuring optical fiber.
8. The distributed optical fiber-based concrete crack resistance device according to claim 1, wherein the distributed temperature measuring optical fiber comprises:
a temperature measuring optical fiber;
the protective coating is coated outside the temperature measuring optical fiber;
heating wires distributed around the temperature measuring optical fibers;
the second protective layer is coated outside the protective coating and the heating wire;
the metal armor is coated outside the second protective layer;
a third protective layer coated outside the metal armor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921547028.1U CN211080237U (en) | 2019-09-18 | 2019-09-18 | Concrete anti-cracking device based on distributed optical fiber |
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| CN201921547028.1U CN211080237U (en) | 2019-09-18 | 2019-09-18 | Concrete anti-cracking device based on distributed optical fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512608A (en) * | 2019-09-18 | 2019-11-29 | 上海建工二建集团有限公司 | Concrete anticracking apparatus and method based on distribution type fiber-optic |
| CN113176010A (en) * | 2021-04-21 | 2021-07-27 | 北京路鹏达建设发展有限责任公司 | Large-volume concrete optical fiber intelligent temperature monitoring method |
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2019
- 2019-09-18 CN CN201921547028.1U patent/CN211080237U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512608A (en) * | 2019-09-18 | 2019-11-29 | 上海建工二建集团有限公司 | Concrete anticracking apparatus and method based on distribution type fiber-optic |
| CN113176010A (en) * | 2021-04-21 | 2021-07-27 | 北京路鹏达建设发展有限责任公司 | Large-volume concrete optical fiber intelligent temperature monitoring method |
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