CN110306430B - Self-sensing parallel steel wire cold cast anchor and manufacturing method thereof - Google Patents
Self-sensing parallel steel wire cold cast anchor and manufacturing method thereof Download PDFInfo
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- CN110306430B CN110306430B CN201910685071.2A CN201910685071A CN110306430B CN 110306430 B CN110306430 B CN 110306430B CN 201910685071 A CN201910685071 A CN 201910685071A CN 110306430 B CN110306430 B CN 110306430B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000005266 casting Methods 0.000 claims abstract description 40
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000002861 polymer material Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 125000000623 heterocyclic group Chemical group 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 230000004083 survival effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-sensing parallel steel wire chill casting anchor which is characterized by comprising a wire dividing plate, a sensor, an anchor cup, a centering ring, a supporting cylinder and parallel steel wires, wherein the wire dividing plate and the centering ring are fixed in the anchor cup; the support cylinder is connected with the anchor cup, and cold casting materials are poured into the anchor cup and the support cylinder; the invention realizes accurate measurement of the whole cable force of the cable body and can feed back the stress state in real time, thereby solving the defects of inaccurate monitoring, large error, difficult measurement and the like of the existing parallel steel wire chill casting anchor cable force.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a self-sensing parallel steel wire cold cast anchor and a manufacturing method thereof.
Background
In recent years, bridge engineering in China is vigorously developed, and a large-span bridge is pulled up. The parallel steel wire cold cast anchor inhaul cable is widely applied to inhaul cables of cable-stayed bridges, suspenders of tied arch bridges, cables of suspension bridges and the like, and is also known as a life line of a bridge. Due to factors such as structural design, environmental corrosion, annual repair loss and the like, the inhaul cable is inevitably damaged to different degrees. At present, the monitoring means mainly applied in bridge engineering in China are difficult to accurately measure the health state of the parallel steel wire inhaul cable.
The existing parallel steel wire cold cast anchor is characterized in that a whole parallel steel wire is grooved, the grooved length is the same as the length of the parallel steel wire, and then a sensor is fixed in the groove through an adhesive to form an intelligent steel wire; this approach has the following technical problems
In the first aspect, a plurality of parallel steel wires are arranged in the cold cast anchor inhaul cable, only a few of the parallel steel wires are intelligent steel wires, the intelligent steel wires can only measure the stress of the intelligent steel wires, and the stress condition of the whole cable force can only adopt a reverse pushing method, so that the accumulated error is larger; if 55 parallel steel wires with small specification types are arranged in the inhaul cable, if only one intelligent steel wire is an intelligent steel wire, if the stress condition of the whole cable force needs to be measured, the measured value of the single intelligent steel wire needs to be multiplied by 55 to obtain the stress condition of the whole cable force; however, if the measured intelligent steel wire is damaged or broken in construction, the data error measured by the reverse pushing method will be large.
In the second aspect, at present, the low survival rate of the fiber bragg grating sensor is caused by the material of the fiber bragg grating sensor and cannot be protected by a simple process, and most of the existing process protection is to open and groove on parallel steel wires, and the problems of slow processing process, low working efficiency and high production cost are caused by the fact that the groove needs to be formed on the whole parallel steel wires and the sensor is bonded in the groove.
In the third aspect, the fiber bragg grating sensor in the prior art has the defect that the measuring range is insufficient to support the deformation amount generated by the stress of the inhaul cable.
In addition, the method for measuring the whole cable force by adopting a frequency method and a magnetic flux sensor is greatly influenced by a base material and the environment, and the measurement is inaccurate. The pressure ring sensor has the defects of labor and effort, easy eccentricity, high price and the like in construction.
Disclosure of Invention
The invention aims to provide a self-sensing parallel steel wire cold cast anchor, which solves the problems of negative impurities, high production cost and low production and construction efficiency of the production process in the prior art under the condition of not changing the existing structure of a cold cast anchor inhaul cable; therefore, the defects of inaccurate monitoring, large error, difficult measurement and the like of the existing parallel steel wire chill casting anchor cable force are overcome.
The invention further aims to solve the problem that the integral cable force of the cold cast anchor cannot be accurately measured in the prior art, and the stress state can be fed back in real time.
In order to achieve the aim, the invention provides a self-sensing parallel steel wire chill casting anchor which is characterized by comprising a wire dividing plate, a sensor, an anchor cup, a centering ring, a supporting cylinder and parallel steel wires, wherein the wire dividing plate and the centering ring are fixed in the anchor cup; the support cylinder is connected with the anchor cup, and cold casting materials are poured into the anchor cup and the support cylinder; the sensor consists of a sensor lead, a fixed layer and a high-temperature-resistant supporting medium, and is buried and fixed in the anchor cup through the chill casting, so that the chill casting, the sensor and the parallel steel wires form a whole with the anchor cup; and a protective material for preventing the sensor lead from being damaged is fixed on the high-temperature-resistant supporting medium.
Preferably, the protective material is one or a combination of more than one of silica gel, rubber, elastic resin, elastic coating, chemical fiber fabric and plant fiber fabric; the fixing layer is one or the combination of two of an adhesive and a heat-resistant polymer material.
Preferably, the adhesive is one or a combination of a heterocyclic polymer adhesive, an epoxy resin adhesive, a phenolic resin adhesive and an organic silica gel adhesive.
Preferably, the number of the sensor leads is 1 or more, the sensor leads are fixed on a high-temperature-resistant supporting medium through a fixing layer, and the high-temperature-resistant supporting medium is in a regular or irregular shape.
A manufacturing method of a self-sensing parallel steel wire chill casting anchor comprises the following steps:
1) Taking a section of high-temperature-resistant supporting medium, and fixing a protective material for preventing the damage of the sensor lead on the high-temperature-resistant supporting medium by combining any one or more modes of coating, winding, wrapping and bonding;
2) Fixing part of sensor leads on a high-temperature-resistant supporting medium through an adhesive or a heat-resistant polymer material, and wrapping and protecting the other part of sensor leads through a protective material to finish the manufacturing of the sensor;
3) The parallel steel wires and the prefabricated sensor penetrate into the anchor cup, and cold casting materials are poured into the anchor cup, and when the anchor cup is poured, part of the cold casting materials are poured into a supporting cylinder connected with the anchor cup so as to prevent the cold casting materials in the anchor cup from being not fully poured, so that the stability of an anchor device can be improved; after pouring of the cold casting material is completed; solidifying the part poured with the cold casting material at high temperature to fix the parallel steel wires and the sensor in the anchor cup to form a whole with the anchor cup;
4) And (3) leading out the wrapped sensor lead, detecting, and after the detection is finished, wrapping the sensor lead with a protective material to prevent the damage of the sensor lead.
The invention has the beneficial effects that: realizes accurate measurement of the whole cable force of the cable body, and can feed back the stress state in real time, thereby solving the defects of inaccurate monitoring, large error, difficult measurement and the like of the existing parallel steel wire cold-cast anchor cable force,
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the sensor according to the present invention;
FIG. 3 is a schematic view of a portion of another construction of a sensor according to the present invention;
FIG. 4 is a schematic view of a portion of another construction of a sensor according to the present invention;
FIG. 5 is a schematic view of a portion of another construction of a sensor according to the present invention;
FIG. 6 is a schematic view of a portion of another construction of a sensor according to the present invention;
The figures indicate: the sensor comprises a wire dividing plate 1, a sensor 2, a sensor lead 21, a fixing layer 22, a supporting medium 23, a protective material 24, an anchor cup 3, a centering ring 4, a supporting cylinder 5 and parallel steel wires 6, and a chill casting 7.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings and examples which are given by way of illustration of the invention, but are not intended to limit the scope of the invention.
Examples
Referring to fig. 1 to 6, the invention provides a self-sensing parallel steel wire chill casting anchor, which is characterized by comprising a wire dividing plate 1, a sensor 2, an anchor cup 3, a centering ring 4, a supporting cylinder 5 and a parallel steel wire 6, wherein the wire dividing plate 1 and the centering ring are fixed in the anchor cup 3; the support cylinder 5 is connected with the anchor cup 3, and cold casting materials 7 are poured into the anchor cup 3 and the support cylinder 5; the sensor consists of a sensor lead wire 21, a fixed layer 22 and a high-temperature-resistant supporting medium 23, wherein the sensor 2 is buried and fixed in the anchor cup 3 through the chill casting 7, so that the chill casting 7, the sensor 2 and the parallel steel wires 6 are integrated with the anchor cup 3; the high-temperature-resistant supporting medium 23 is fixedly provided with a protective material 24 for preventing the damage of the sensor lead; wherein the protective material 24 is one or a combination of more of silica gel, rubber, elastic resin, elastic coating, chemical fiber fabric and plant fiber fabric; the fixing layer 22 is adhesive; the adhesive is one or a combination of a plurality of heterocyclic polymer adhesives, epoxy resin adhesives, phenolic resin adhesives and organic silica gel adhesives; the number of the sensor leads is 1 or more, and the sensor leads are fixed on a high-temperature-resistant supporting medium through a fixing layer; the shape of the high-temperature-resistant supporting medium is regular or irregular.
When the embodiment is implemented, a protective material for preventing the damage of the sensor lead wire is adhered and fixed at one end of a high-temperature-resistant supporting medium with the length longer than that of the supporting cylinder; fixing part of sensor leads on a high-temperature-resistant supporting medium through an adhesive, and wrapping and protecting the other part of sensor leads through a protective material to finish the manufacturing of the sensor; connecting the wire dividing plate, the centering ring and the anchor cup, penetrating the parallel steel wires and the prefabricated sensor into the anchor cup, and connecting the supporting cylinder with the anchor cup; pouring cold casting materials into the anchor cup, wherein when pouring, in order to prevent the cold casting materials in the anchor cup from being not fully poured, part of the cold casting materials are poured into a supporting cylinder connected with the anchor cup, so that the stability of an anchor device can be improved; after pouring of the cold casting material is completed; solidifying the part poured with the cold casting material at high temperature to fix the parallel steel wires and the sensor in the anchor cup to form a whole with the anchor cup; and (3) leading out the wrapped sensor lead, detecting, and after the detection is finished, wrapping the sensor lead with a protective material to prevent the damage of the sensor lead.
According to the invention, the sensor is directly inserted into the anchor cup of each inhaul cable, and the sensor, the parallel steel wires and the anchor cup are integrated through poured chill casting materials, so that the sensor and the chill casting body are synchronously deformed; when the cable force is measured, only the sensor is combined with the equipment, and the back pushing is not needed, so that the aim of directly testing and monitoring the whole cable force is fulfilled, and the back pushing is not needed; therefore, the limitation and the defect of the existing monitoring means are overcome, for example, the intelligent steel wire can only measure the stress of a single steel wire of the inhaul cable, and the integral cable force can only be measured by adopting a reverse pushing method, so that the accumulated error is larger. The method for measuring the whole cable force by adopting a frequency method and a magnetic flux sensor is greatly influenced by a base material and the environment and is inaccurate in measurement. The pressure ring sensor has the defects of labor and effort consumption, easy eccentricity, high price and the like in construction; the problem that the survival rate of the fiber bragg grating sensor in the production and transportation processes of the parallel steel wire chill casting anchor is low in the prior art is solved. At present, the low survival rate of the fiber bragg grating sensor is caused by the material of the fiber bragg grating sensor, the sensor is attached to a high-temperature-resistant supporting medium and is covered and fixed by an adhesive or a heat-resistant polymer material, and the fiber bragg grating sensor is placed in an anchor cup, guided out by the high-temperature-resistant supporting medium and wrapped by a protective material, so that the sensor is protected in production and transportation; because the sensor is arranged in the cold casting body in the anchorage device and is not fixed on the parallel steel wires, the deformation of the cold casting body is far smaller than that of the inhaul cable body in the stress process of the inhaul cable, the defect that the measuring range of the fiber bragg grating sensor in the prior art is insufficient to support the deformation generated by stress of the inhaul cable is solved, and the problem of insufficient measuring range of the fiber bragg grating sensor is solved; in addition, by improving the manufacturing mode of the sensor, the problems of complex production process, high cost and low production and construction efficiency are solved.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (5)
1. The self-sensing parallel steel wire chill casting anchor comprises a wire dividing plate, a sensor, an anchor cup, a centering ring, a supporting cylinder and parallel steel wires, wherein the wire dividing plate and the centering ring are fixed in the anchor cup; the support cylinder is connected with the anchor cup, and cold casting materials are poured into the anchor cup and the support cylinder; the method is characterized in that: the sensor consists of a sensor lead, a fixed layer and a high-temperature-resistant supporting medium, and is buried and fixed in the anchor cup through the chill casting material, so that the chill casting material, the sensor and the anchor cup form a whole; and a protective material for preventing the sensor lead from being damaged is fixed on the high-temperature-resistant supporting medium.
2. A self-sensing parallel wire chill anchor as defined in claim 1, wherein: the protective material is one or a combination of more of silica gel, rubber, elastic resin, elastic coating, chemical fiber fabric and plant fiber fabric; the fixing layer is adhesive.
3. A self-sensing parallel wire chill anchor as defined in claim 2, wherein: the adhesive is one or a combination of a plurality of heterocyclic polymer adhesives, epoxy resin adhesives, phenolic resin adhesives and organic silica gel adhesives.
4. A self-sensing parallel wire chill anchor as defined in claim 1, wherein: the number of the sensor leads is 1 or more, the sensor leads are fixed on a high-temperature-resistant supporting medium through a fixing layer, and the height of the fixing layer is larger than that of the casting material poured in the anchor cup; the shape of the high-temperature-resistant supporting medium is regular or irregular.
5. A manufacturing method of a self-sensing parallel steel wire chill casting anchor is characterized by comprising the following steps of: the self-sensing parallel steel wire chill casting anchor is the self-sensing parallel steel wire chill casting anchor according to any one of claims 1 to 4; the method comprises the following steps:
1) Taking a section of high-temperature-resistant supporting medium, and fixing a protective material for preventing the damage of the sensor lead on the high-temperature-resistant supporting medium by combining any one or more modes of coating, winding, wrapping and bonding;
2) Fixing part of sensor leads on a high-temperature-resistant supporting medium through an adhesive or a heat-resistant polymer material, and wrapping and protecting the other part of sensor leads through a protective material to finish the manufacturing of the sensor;
3) The parallel steel wires and the prefabricated sensor penetrate into the anchor cup, and cold casting materials are poured into the anchor cup, and in order to prevent the cold casting materials in the anchor cup from being not fully poured, parts of the support cylinder connected with the anchor cup are also poured, so that the stability of an anchor device can be improved, and after the cold casting materials are poured; high-temperature curing is carried out, so that the parallel steel wires and the sensor are fixed in the anchor cup to form a whole with the anchor cup;
4) And (3) leading out the wrapped sensor lead, detecting, and after the detection is finished, wrapping the sensor lead with a protective material to prevent the damage of the sensor lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910685071.2A CN110306430B (en) | 2019-07-27 | 2019-07-27 | Self-sensing parallel steel wire cold cast anchor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910685071.2A CN110306430B (en) | 2019-07-27 | 2019-07-27 | Self-sensing parallel steel wire cold cast anchor and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110306430A CN110306430A (en) | 2019-10-08 |
| CN110306430B true CN110306430B (en) | 2024-05-24 |
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| CN201910685071.2A Active CN110306430B (en) | 2019-07-27 | 2019-07-27 | Self-sensing parallel steel wire cold cast anchor and manufacturing method thereof |
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| CN (1) | CN110306430B (en) |
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| CN110306430A (en) | 2019-10-08 |
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