CN113513122A - Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method - Google Patents
Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method Download PDFInfo
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- CN113513122A CN113513122A CN202110301255.1A CN202110301255A CN113513122A CN 113513122 A CN113513122 A CN 113513122A CN 202110301255 A CN202110301255 A CN 202110301255A CN 113513122 A CN113513122 A CN 113513122A
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-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to a hot cast anchor of an intelligent steel strand inhaul cable and a manufacturing method thereof, wherein the hot cast anchor comprises an optical fiber cable body and an anchor cup fixed at one end of the optical fiber cable body, and the hot cast anchor also comprises: one end of the steel wire is positioned in the optical fiber cable body, the other end of the steel wire is positioned in the anchor cup, and a groove is formed in the steel wire along the axial direction parallel to the optical fiber cable body; one end of the detection piece is positioned in the groove, and the other end of the detection piece is positioned in the cavity on the anchor cup. The above-mentioned scheme that this application provided, through in the recess with the detection piece setting on the steel wire, the detection piece warp with the steel wire is in coordination this moment, the direct reaction has gone out the atress situation of cable, the error problem that exists in the traditional indirect detection means has been avoided, protect the detection piece through the recess simultaneously, and the recess inner chamber is greater than the diameter of detection piece along the radial size of steel wire, and then avoided the recess to send transverse extrusion to the detection piece, external factor has effectively been avoided promptly and has caused the unnecessary damage to the detection piece, the accuracy of monitoring data has been ensured.
Description
Technical Field
The invention relates to the technical field of draglines for engineering, in particular to a hot-cast anchor of an intelligent steel strand dragline and a manufacturing method thereof.
Background
The buildings such as stadiums and the like mostly adopt bracing structures of the guys, and one set of guy system needs a plurality of pairs of guy bodies and anchors at two ends of the guy bodies to be matched with each other to bear the bracing force. Because any building needs to consider the safety problem, the safety of the guy cable system is very important for the building supported by the guy cable system, and the stress condition of the whole guy cable system needs to be detected.
At present, for a hot-cast inhaul cable, common monitoring methods comprise the following steps: a pressure ring monitoring method, a magnetic flux sensor monitoring method, a hydraulic sensor monitoring method, and the like. However, the stress monitoring of the guy cable system is a work which needs long-term measurement and real-time monitoring, and the durability, the survival rate and the stability of a monitoring device need to be considered.
Most of the existing monitors belong to anchorage device external parts, the cost is higher, and the volume is increased after installation. With the development of the technology, the fiber bragg grating is gradually applied to monitoring of the parallel steel wire rope, but transverse extrusion is likely to occur in the twisting process of the steel strand, damage is caused to the optical fiber or monitoring data is inaccurate, the temperature of the hot cast anchor is high in the manufacturing process of the hot cast anchor, and it is difficult to adopt which high temperature resistant measure to protect the fiber bragg grating.
Disclosure of Invention
Therefore, it is necessary to provide a hot cast anchor of an intelligent steel strand inhaul cable and a manufacturing method thereof, aiming at the problem that the fiber bragg grating may be transversely extruded to damage an optical fiber or cause inaccurate monitoring data in the existing steel strand twisting process.
The invention provides a hot cast anchor of an intelligent steel strand inhaul cable, which comprises an optical fiber cable body and an anchor cup fixed at one end of the optical fiber cable body, and further comprises:
one end of the steel wire is positioned in the optical fiber cable body, the other end of the steel wire is positioned in the anchor cup, and a groove is formed in the steel wire along the axial direction parallel to the optical fiber cable body;
and one end of the detection piece is positioned in the groove, the other end of the detection piece is positioned in the cavity on the anchor cup, and the diameter of the detection piece is smaller than the radial size of the inner cavity of the groove along the steel wire.
Above-mentioned wisdom steel strand wires cable's hot cast anchor, through in the recess with the detection piece setting on the steel wire, the detection piece warp with the steel wire is in coordination this moment, direct reaction has gone out the atress situation of cable, the error problem that exists in the traditional indirect means of detecting has been avoided, protect the detection piece through the recess simultaneously, and the recess inner chamber is greater than the diameter that detects the piece along the radial size of steel wire, and then avoided the recess to send horizontal extrusion to the detection piece, external factor has effectively been avoided promptly and has caused the unnecessary damage to the detection piece, the accuracy of monitoring data has been ensured.
In one embodiment, the detection member includes a fiber grating, the fiber grating is provided with a fiber line, and the same end of the fiber grating and the same end of the fiber line are both located in the groove.
In one embodiment, the inner wall of the groove is provided with a heat insulation layer, and one end of the fiber grating is wrapped in the heat insulation layer.
In one embodiment, the diameter of the fiber grating is smaller than the inner diameter of the thermal insulation layer along the radial direction of the steel wire.
In one embodiment, the outer side wall of the fiber grating is provided with a fireproof flame-retardant layer.
In one embodiment, the outer side wall of the fireproof flame-retardant layer is provided with a silica gel fiber sleeve.
In one embodiment, the outer side wall of the optical fiber line is provided with a layer of epoxy glue.
The invention also provides a manufacturing method of the hot-cast anchor of the intelligent steel strand inhaul cable, which is used for the hot-cast anchor of the intelligent steel strand inhaul cable in any one of the descriptions of the embodiment of the application, and the method comprises the following steps:
a groove is axially arranged on the steel wire, and a heat insulation layer is arranged on the inner wall of the groove;
placing one end of the fiber grating in the groove, wherein the end of the fiber grating facing the groove is wrapped in the heat insulation layer;
and putting the fiber bragg grating and the steel wire into the anchor cup together, and simultaneously injecting zinc liquid into the casting section on the anchor cup so as to integrate the fiber bragg grating, the steel wire and the anchor cup.
In one embodiment, before placing the end of the fiber grating in the groove, the method further comprises:
and spraying a fireproof flame-retardant layer on the side wall of the fiber grating.
In one embodiment, after spraying the fireproof flame-retardant layer on the side wall of the fiber grating, the method further comprises:
and a silica gel fiber sleeve is arranged on the outer side of the fireproof flame-retardant layer.
Drawings
Fig. 1 is a schematic structural view of a hot-cast anchor of a smart steel strand cable according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the steel wire and the fiber grating of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the fiber grating of FIG. 1;
FIG. 4 is a schematic view of the fiber grating of FIG. 1;
fig. 5 is a perspective view of fig. 1.
The figures are labeled as follows:
10. an optical fiber cable body; 20. an anchor cup; 201. a casting section; 30. a steel wire; 40. a fiber grating; 401. an optical fiber line; 4011. epoxy resin glue; 402. a fire resistant and flame retardant layer; 403. silica gel fiber sleeve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1 in combination with fig. 5, in an embodiment of the present invention, there is provided a hot cast anchor for a smart steel strand cable, including a fiber cable body 10 and an anchor cup 20 fixed at one end of the fiber cable body 10, further including: the optical cable comprises a steel wire 30 and a detection piece, wherein one end of the steel wire 30 is located in the optical cable body 10, the other end of the steel wire is located in the anchor cup 20, a groove is formed in the steel wire 30 in the axial direction parallel to the optical cable body 10, one end of the detection piece is located in the groove, the other end of the detection piece is located in a cavity in the anchor cup 20, and the diameter of the detection piece is smaller than the radial size of the inner cavity of the groove along the steel wire 30.
Adopt above-mentioned technical scheme, through in the recess with the detection piece setting on the steel wire, the detection piece is out of shape with the steel wire is in coordination this moment, the direct reaction has gone out the atress situation of cable, the error problem that exists in the traditional indirect detection means has been avoided, protect the detection piece through the recess simultaneously, and the recess inner chamber is greater than the diameter that detects the piece along the radial size of steel wire, and then avoided the recess to send horizontal extrusion to the detection piece, external factor has effectively been avoided promptly and has caused the unnecessary damage to the detection piece, the accuracy of monitoring data has been ensured.
In some embodiments, as shown in fig. 4 in combination with fig. 1 and 2, the detecting member in the present application includes a fiber grating 40, the fiber grating 40 is provided with a fiber line 401, and the same end of the fiber grating 40 and the fiber line 401 are located in the groove.
Fiber grating technology is formed by using ultraviolet exposure techniques to induce periodic changes in the refractive index of the fiber core. The periodic structure of the refractive index distribution in the fiber grating causes the reflection of light of a certain wavelength, thereby forming the reflection spectrum of the fiber grating. The fiber grating stress sensor is usually made by attaching the fiber grating to some elastomer and performing protective packaging. The wavelength of the reflected light is very sensitive to temperature, stress and strain, when the elastic body is stressed, the fiber bragg grating and the elastic body are strained together, peak wavelength drift of the reflected light of the fiber bragg grating is caused, and the temperature, the stress and the strain are sensed by measuring the wavelength drift, so that the steel wire in the inhaul cable can be monitored.
In some embodiments, since the fiber grating 40 itself is fine and brittle, and has poor shear resistance, and needs to withstand a high temperature of more than 500 ℃ during the anchor hot-casting process, the high temperature makes the fiber brittle and the shear resistance worse, a thermal insulation layer needs to be disposed on the inner wall of the groove before the anchor hot-casting, and one end of the fiber grating 40 is wrapped in the thermal insulation layer.
The heat insulation layer is made of epoxy resin adhesive, the epoxy resin adhesive is generally an adhesive prepared by taking epoxy resin as a main body, and an epoxy resin curing agent is generally required to be added to the epoxy resin adhesive for curing. When the cleaning agent is used, firstly, dry cotton cloth or sand paper is used for removing dust, oil stain, rust and the like on the inner wall of the groove, and then cleaning agent such as acetone or trichloroethylene is used for cleaning the inner wall of the groove; then the front cover is unscrewed, and the agent A and the agent B are fully and uniformly stirred according to the stated weight proportion (A: B is 2: 1); in order to ensure the using effect, the epoxy resin adhesive can be vacuumized and used, and meanwhile, in order to avoid material waste, the epoxy resin adhesive which is stirred in the epoxy resin adhesive is used up in the operable time, otherwise, the epoxy resin adhesive is solidified, and the highest strength can be obtained after 24 hours; the epoxy resin adhesive formula epoxy resin AB adhesive is a two-component high-temperature-resistant adhesive taking epoxy resin as a base, and is mainly suitable for the adhesive joint of high-temperature-resistant metal, ceramic and the like.
In some embodiments, in order to avoid the extrusion of the thermal insulation layer in the groove to the fiber grating 40, and thus the fiber grating 40 is damaged, the diameter of the fiber grating 40 in the present application is smaller than the inner diameter of the thermal insulation layer along the radial direction of the steel wire 30.
When the heat insulation layer is sprayed on the inner wall of the groove, the inner diameter of the heat insulation layer along the radial direction of the steel wire 30 is ensured to be larger than the diameter of the fiber grating 40, namely, after the fiber grating 40 extends into the groove, the fiber grating 40 is in clearance fit with the groove sprayed with the heat insulation layer, so that the groove can not pressurize the fiber grating 40, and the fiber grating 40 is prevented from being damaged.
In some embodiments, as shown in fig. 3, a fireproof flame retardant layer 402 is disposed on an outer sidewall of the fiber grating 40, the fireproof flame retardant layer 402 is made of a low-smoke halogen-free flame retardant polyolefin oxygen insulation material, which is formed by precisely mixing and processing polymer materials such as polyolefin as a main base material, a characteristic halogen-free flame retardant and a smoke suppressor according to a special formula. Its fire-retardant system has excellent fire-retardant property, not only has high oxygen index, but also has excellent heat-insulating and oxygen-insulating properties. No halogen acid gas is discharged during combustion, the release amount of toxic and corrosive gas is very little, the concentration of the generated smoke is very low, and the flame retardant effect is very good. The low-smoke halogen-free flame-retardant polyolefin oxygen insulation material not only enables the fiber grating to have excellent flame retardant performance, the smoke amount emitted during combustion is extremely low, no corrosive gas is generated, but also has good extrusion molding processability, and can be extruded and processed on a common PVC (polyvinyl chloride) extruder as long as a cooling device is normal. If adopt low compression ratio screw rod, the extrusion molding effect is better, is suitable for the fire-retardant place that requires halogen-free, low corruption.
It should be noted that the type of the low-smoke halogen-free flame-retardant polyolefin oxygen-barrier material is used as the fireproof flame-retardant layer in the embodiment of the present application, which is only an example, in other alternative schemes, other types may also be used, for example, the fireproof flame-retardant layer is made of flame-retardant rubber. The present application does not specifically limit the specific kind of the fireproof flame-retardant layer, as long as the above-described structure can achieve the object of the present application.
In some embodiments, as shown in fig. 3, the present application provides a silicone fiber sleeve 403 on the outer sidewall of the fireproof flame retardant layer 402. The silica gel fiber sleeve 403 is a silica resin glass fiber sleeve, so that the high temperature resistance of the whole fiber grating 40 can be effectively improved.
It should be noted that the structure of the silicone fiber sleeve in the embodiment of the present application is merely an example, and in other alternative solutions, other structures may also be adopted, for example, the silicone fiber sleeve is an 2752/2751 silicone rubber fiberglass insulation sleeve. The specific type of the silica gel fiber sleeve is not particularly limited in the present application as long as the above-described structure can achieve the object of the present application.
In some embodiments, as shown in fig. 4, the outer side wall of the optical fiber 401 is provided with a layer of epoxy glue 4011, and the optical fiber 401 is provided with the epoxy glue 4011, so that the optical fiber 401 can be prevented from being damaged at high temperature when the anchor is hot-cast due to the high temperature resistance of the epoxy glue 4011.
The invention also provides a manufacturing method of the hot-cast anchor of the intelligent steel strand inhaul cable, which is used for the hot-cast anchor of the intelligent steel strand inhaul cable in the embodiment description, and the method is shown in the reference figure 1 and comprises the following steps:
the method comprises the following steps: a groove is axially arranged on the steel wire 30, and a heat insulation layer is arranged on the inner wall of the groove;
step two: placing one end of the fiber grating 40 in the groove, wherein the end of the fiber grating 40 facing the groove is wrapped in the heat insulation layer;
step three: the fiber bragg grating 40 and the steel wire 30 are placed into the anchor cup 20 together, and meanwhile, the zinc liquid is injected into the casting section 201 on the anchor cup 20, so that the fiber bragg grating 40, the steel wire 30 and the anchor cup 20 are integrated.
By adopting the method, the fiber bragg grating is arranged in the groove on the steel wire, and then the zinc liquid is injected into the casting section on the anchor cup, so that the fiber bragg grating can be fixed and stressed simultaneously, and further the fiber bragg grating and the steel wire deform in a coordinated manner, the stress condition of the cable is directly reflected, the error problem existing in the traditional indirect detection means is avoided, meanwhile, the fiber bragg grating is protected through the groove, the radial dimension of the inner cavity of the groove along the steel wire is larger than the diameter of the fiber bragg grating, the transverse extrusion of the groove on the fiber bragg grating is avoided, namely, the unnecessary damage of external factors on the fiber bragg grating is effectively avoided, and the accuracy of monitoring data is ensured.
In some embodiments, before placing the one end of the fiber grating in the groove, the method further comprises: and spraying a fireproof flame-retardant layer on the side wall of the fiber grating. The fireproof flame-retardant layer is made of low-smoke halogen-free flame-retardant polyolefin oxygen insulation material, wherein the low-smoke halogen-free flame-retardant polyolefin oxygen insulation material is prepared by taking high polymer materials such as polyolefin as main base materials, containing a characteristic halogen-free flame retardant and a smoke suppressor and performing precise mixing processing by a special formula. Its fire-retardant system has excellent fire-retardant property, not only has high oxygen index, but also has excellent heat-insulating and oxygen-insulating properties. No halogen acid gas is discharged during combustion, the release amount of toxic and corrosive gas is very little, the concentration of the generated smoke is very low, and the flame retardant effect is very good. The low-smoke halogen-free flame-retardant polyolefin oxygen insulation material not only enables the fiber grating to have excellent flame retardant performance, the smoke amount emitted during combustion is extremely low, no corrosive gas is generated, but also has good extrusion molding processability, and can be extruded and processed on a common PVC (polyvinyl chloride) extruder as long as a cooling device is normal. If adopt low compression ratio screw rod, the extrusion molding effect is better, is suitable for the fire-retardant place that requires halogen-free, low corruption.
It should be noted that the type of the low-smoke halogen-free flame-retardant polyolefin oxygen-barrier material is used as the fireproof flame-retardant layer in the embodiment of the present application, which is only an example, in other alternative schemes, other types may also be used, for example, the fireproof flame-retardant layer is made of flame-retardant rubber. The present application does not specifically limit the specific kind of the fireproof flame-retardant layer, as long as the above-described structure can achieve the object of the present application.
Further, in order to make the whole fiber grating have high temperature resistance, after the application sprays the fireproof flame-retardant layer on the side wall of the fiber grating, the method further comprises: set up the silica gel fiber sleeve pipe in the fire prevention fire-retardant layer outside, this silica gel fiber sleeve pipe chooses for use the silicone resin glass fiber sleeve pipe to can effectively improve whole fiber grating's high temperature resistance.
It should be noted that the structure of the silicone fiber sleeve in the embodiment of the present application is merely an example, and in other alternative solutions, other structures may also be adopted, for example, the silicone fiber sleeve is an 2752/2751 silicone rubber fiberglass insulation sleeve. The specific type of the silica gel fiber sleeve is not particularly limited in the present application as long as the above-described structure can achieve the object of the present application.
In summary, the present invention, when in use:
firstly, a groove is axially arranged on a steel wire, then a heat insulation layer is sprayed on the inner wall of the groove, then a fireproof flame-retardant layer is sprayed on the outer side of the fiber grating, finally a silica gel fiber sleeve is sleeved on the outer side of the fireproof flame-retardant layer, meanwhile, epoxy resin glue is sprayed on the outer side of an optical fiber line on the fiber grating, then, one end of the fiber grating is placed into the groove, the fiber grating is in clearance fit with the groove sprayed with the heat insulation layer, thus the groove can not pressurize the fiber grating, the fiber grating and the steel wire are cooperatively deformed, the stress condition of the cable is directly reflected, the error problem existing in the traditional indirect detection means is avoided, meanwhile, the fiber grating is protected through the groove, the radial size of the inner cavity of the groove along the steel wire is larger than the diameter of the fiber grating, further, the groove is prevented from transversely extruding the fiber grating, and the unnecessary damage of the fiber grating caused by external factors is effectively avoided, the accuracy of the monitoring data is ensured;
this application marks wisdom cable monitoring data through the tension test that relapses many times, and the actual tension value and the load curve of testing machine are less than 1% with the cable force and the load curve deviation scope that optic fibre wisdom cable read, and on being particularly suitable for using the health monitoring of large-span space cable structure, the precision that can improve monitoring data can in time early warning when the cable force surpasss the design value.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a hot cast anchor of wisdom steel strand wires cable, includes optic fibre cable body (10) and fixes anchor cup (20) of optic fibre cable body (10) one end, its characterized in that still includes:
one end of the steel wire (30) is positioned in the optical fiber cable body (10), the other end of the steel wire (30) is positioned in the anchor cup (20), and a groove is formed in the steel wire (30) along the axial direction parallel to the optical fiber cable body (10);
one end of the detection piece is positioned in the groove, the other end of the detection piece is positioned in the cavity on the anchor cup (20), and the diameter of the detection piece is smaller than the radial size of the inner cavity of the groove along the steel wire (30).
2. The hot-cast anchor of wisdom steel strand wires cable of claim 1, characterized in that, the detector includes fiber grating (40), is provided with optic fibre line (401) on fiber grating (40), and the same end of fiber grating (40) and optic fibre line (401) all is located in the recess.
3. The cast anchor of the intelligent steel strand inhaul cable according to claim 2, wherein the inner wall of the groove is provided with a heat insulation layer, and one end of the fiber grating (40) is wrapped in the heat insulation layer.
4. The cast anchor of a smart steel strand cable according to claim 3, wherein the diameter of the fiber grating (40) is smaller than the inner diameter of the insulation layer in the radial direction of the steel wire (30).
5. The hot-cast anchor of the intelligent steel strand inhaul cable according to claim 2, wherein the outer side wall of the fiber grating (40) is provided with a fireproof flame-retardant layer (402).
6. The cast anchor of wisdom steel strand wires cable of claim 5, characterized in that, the fire prevention flame retardant layer (402) the lateral wall is provided with silica gel fibre sleeve (403).
7. The cast anchor of wisdom steel strand stay of claim 2 characterized in that, the lateral wall of optic fibre line (401) is provided with a layer of epoxy glue (4011).
8. A method for manufacturing a hot-cast anchor of a smart steel strand cable, the method being used for the hot-cast anchor of the smart steel strand cable according to any one of claims 1 to 7, the method comprising:
a groove is axially arranged on the steel wire, and a heat insulation layer is arranged on the inner wall of the groove;
placing one end of the fiber grating in the groove, wherein the end of the fiber grating facing the groove is wrapped in the heat insulation layer;
and putting the fiber bragg grating and the steel wire into the anchor cup together, and simultaneously injecting zinc liquid into the casting section on the anchor cup so as to integrate the fiber bragg grating, the steel wire and the anchor cup.
9. The cast-in-place anchor for a smart strand cable of claim 8, wherein prior to placing an end of the fiber grating in the groove, the method further comprises:
and spraying a fireproof flame-retardant layer on the side wall of the fiber grating.
10. The cast-in-place anchor of a smart steel strand cable of claim 9, wherein after spraying a fire retardant layer on the side wall of the fiber grating, the method further comprises:
and a silica gel fiber sleeve is arranged on the outer side of the fireproof flame-retardant layer.
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| CN202110301255.1A CN113513122A (en) | 2021-03-22 | 2021-03-22 | Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method |
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| CN202110301255.1A CN113513122A (en) | 2021-03-22 | 2021-03-22 | Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117702609A (en) * | 2023-10-30 | 2024-03-15 | 中交公路长大桥建设国家工程研究中心有限公司 | Cable-stayed bridge lower anchor head dehumidification system and method |
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