NL2029732B1 - Prefabricated Prestressed Slab Externally Bonded to Ni-Ti-Nb Memory Alloy Fiber Wire and Construction Method Thereof - Google Patents

Prefabricated Prestressed Slab Externally Bonded to Ni-Ti-Nb Memory Alloy Fiber Wire and Construction Method Thereof Download PDF

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Publication number
NL2029732B1
NL2029732B1 NL2029732A NL2029732A NL2029732B1 NL 2029732 B1 NL2029732 B1 NL 2029732B1 NL 2029732 A NL2029732 A NL 2029732A NL 2029732 A NL2029732 A NL 2029732A NL 2029732 B1 NL2029732 B1 NL 2029732B1
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memory alloy
fiber wire
alloy fiber
slab
wire
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NL2029732A
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Dutch (nl)
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Zhang Wei
Wei Jiangang
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Univ Fujian Technology
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

The invention discloses a prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire and a construction method thereof, which comprises a slab body 5 and Ni-Ti-Nb memory alloy fiber wire, the slab body is molded by high-strength grouting material, and the Ni-Ti-Nb memory alloy fiber wire is arranged inside the slab body in a zigzag manner, the Ni-Ti-Nb memory alloy fiber wire comprises a plurality of linear prestressing sections, and two adjacent prestressing sections are connected through arc-shaped anchoring sections, and an embedded steel sleeve is respectively arranged 10 inside each anchoring section. According to the invention, the reset range of the prefabricated prestressed slab made of Ni-Ti-Nb memory alloy fiber wire with different requirements is designed, so that the slab can realize the reset function within the load range of different stages, so that cracks are restored to within 0.20 mm under the normal use state specified in the specification, and the problems that the maintenance and repair of 15 road and bridge structures are difficult and huge manpower and material resources are required are avoided. The prestress direction of the slab can be changed according to the direction of Ni-Ti-Nb memory alloy fiber wire.

Description

Prefabricated Prestressed Slab Externally Bonded to Ni-Ti-Nb Memory Alloy Fiber
Wire and Construction Method Thereof
TECHNICAL FIELD
The invention relates to the technical field of prestressed slabs, in particular to a prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire and a construction method thereof.
BACKGROUND
With the acceleration of the construction of Chinese transportation power, Chinese roads and bridges have developed rapidly in recent years. The total number of bridges has further increased, on the one hand, it has further intensified the task of bridge inspection, maintenance and reinforcement; on the other hand, all kinds of damages caused by increasing heavy loads and strong traffic flows to operating highway bridges, as well as congenital deficiencies in construction and design, poor maintenance in the later maintenance process, untimely maintenance, improper decision-making and other factors lead to irreversible damages to bridges, which leads to frequent collapse accidents of malignant, large and extra-large bridges in China, resulting in a large number of casualties and economic losses. In addition, the decision-making system of bridge maintenance management in China is backward, which leads to huge manpower and material resources for bridge maintenance.
SUMMARY
In order to solve the defects in the mentioned above, the invention provides a prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire and a construction method thereof.
To achieve the above purpose, the invention adopts the following technical scheme.
The invention relates to a prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire, which comprises a slab body and Ni-Ti-Nb memory alloy fiber wire, the slab body is molded by high-strength grouting material, and the Ni-Ti-Nb memory alloy fiber wire is arranged inside the slab body in a zigzag manner; the Ni-Ti-Nb memory alloy fiber wire comprises a plurality of linear prestressing sections, and two adjacent prestressing sections are connected through arc-shaped anchoring sections, and an embedded steel sleeve is respectively arranged inside each anchoring section.
Furthermore, the surface of the Ni-Ti-Nb memory alloy fiber wire is provided with transverse ribs.
Furthermore, the Ni-Ti-Nb memory alloy fiber wire is firstly stretched at normal temperature, and then left for at least 24 hours after stretching, and after the shrinkage is stable, it is stretched for the second time according to its length to reach the target length.
Furthermore, after pouring high-strength grouting material for molding, the Ni-Ti-Nb memory alloy fiber wire is heated to restore to its original state before using at the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire is restored to its original state, and uniform prestress is formed in the high-strength cement matrix by utilizing the shape recovery characteristics of Ni-Ti-Nb memory alloy fiber wire.
Furthermore, after pouring high-strength grouting material for molding, the anchoring force of the anchoring section of Ni-Ti-Nb memory alloy fiber wire should be greater than or equal to the prestress of the prestressing section.
Furthermore, the winding direction of the Ni-Ti-Nb memory alloy fiber wire is determined according to the stress direction of the structure to be reinforced, that is, the prestress direction is controlled by controlling the placement direction of Ni-Ti-Nb memory alloy fiber.
Furthermore, the embedded steel sleeve and concrete at the bend of Ni-Ti-Nb memory alloy fiber wire are in a compressed state.
The invention relates to a construction method for prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire, which comprises the following steps: (1) calculating the lengths of the prestressing section and the anchoring section of the
Ni-Ti-Nb memory alloy fiber wire; (2) after calculating the anchoring section and prestressing section, stretching the Ni-Ti-Nb memory alloy fiber wire at normal temperature, then standing at normal temperature for 24 hours, after its shrinkage is stable, making retest adjustment, then bending the anchoring section, bending Ni-Ti-Nb memory alloy fiber wire according to different anchoring sections and prestress, straightening the prestressing sections, and bending the anchoring sections for later use; (3) fixing a concrete cushion block at the lower part of the anchoring section of the molded
Ni-Ti-Nb memory alloy fiber wire by adopting a fine iron wire, and reserving an iron wire at one end, the concrete cushion block is used for maintaining the shape of the Ni-Ti-Nb memory alloy fiber wire and ensuring the thickness of the protective layer; (4) manufacturing a wooden template according to the design and molding style of Ni-Ti-Nb memory alloy fiber wire, and fixing a round wood block with the same size as the inner diameter of the prefabricated steel sleeve on the wooden template by nails at the center of bending; (5) sheathing the embedded steel sleeve on the round wood block, winding the iron wire reserved on the concrete block on the embedded steel sleeve, fixing the Ni-Ti-Nb memory alloy fiber wire for the second time, pouring high-strength grouting material, and curing according to the specification to form a prestressed slab; (6) before use, heating the prestressed slab to the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire can be restored to its original state, and applying prestress; (7) the anchor rod with the end cut with silk is embedded in the structure to be reinforced, then the embedded hole on the prestressed slab passes through the anchor rod, and finally the anchor rod is locked with a nut.
According to the above technical scheme, aiming at the problems that the number of roads and bridges in service in China is large, the maintenance and repair are difficult, and huge manpower and material resources are consumed, the invention designs a prefabricated prestressed slab externally bonded to fabricated Ni-Ti-Nb memory alloy fiber wire and its construction technology, which can apply prestress without external machinery and anchors, thus avoiding complicated prestressed construction technology; the slab can be prefabricated in the factory, which greatly improves the construction speed of strengthening the existing structure; according to the conventional and unconventional traffic load range of bridges in China (overload, heavy traffic flow, and general traffic accident load), the reset range of prefabricated prestressed slab made of Ni-Ti-Nb memory alloy fiber wire with different requirements is designed, so that the slab can realize the reset function within the load range of different stages, and the cracks can be restored to within 0.20 mm under the normal use state specified in the specification, thus avoiding the problems of difficulty in repairing and maintaining road and bridge structures and huge manpower and material resources; and the prestress direction of the slab can be changed according to the direction of Ni-Ti-Nb memory alloy fiber wire. In addition, the slab is simple to manufacture, convenient for construction and replacement, and multifunctional, which can greatly improve the reinforcement quality of road and bridge structures and is widely used in practical projects.
BRIEF DESCRIPTION OF THE FIGURES
The invention will be further described in detail with reference to the attached drawings and specific embodiments.
Figure 1 A schematic diagram of a prefabricated prestressed slab (bending) externally bonded to Ni-Ti-Nb memory alloy fiber wire according to the present invention
Figure 2 A schematic diagram of the application of prefabricated prestressed slab (bending) externally bonded to Ni-Ti-Nb memory alloy fiber wire to the bending beam
Figure 3 A schematic diagram of a prefabricated prestressed slab (shear) externally bonded to Ni-Ti-Nb memory alloy fiber wire of the present invention
Figure 4 A schematic diagram of the application of prefabricated prestressed slab (shear) externally bonded to Ni-Ti-Nb memory alloy fiber wire to shear beam
Figure 5 A manufacturing flow chart of prefabricated prestressed slab (bending) externally bonded to Ni-Ti-Nb memory alloy fiber wire, in which, Figure (a) is a schematic diagram of concrete cushion block installation; Figure (b) is a schematic diagram of template making; Figure (c) is a schematic assembly diagram;
Figure 6 A manufacturing flow chart of prefabricated prestressed slab (shear) externally bonded to Ni-Ti-Nb memory alloy fiber wire, in which, Figure (a) is a schematic diagram of concrete cushion block installation; Figure (b) is a schematic diagram of template making; Figure (c) is a schematic assembly diagram;
Figure 7 is a sectional view of the stress area of Ni-Ti-Nb memory alloy fiber wire 5 Among them, 1 is prestressed slab, 2 is Ni-Ti-Nb memory alloy fiber wire, 3 is embedded steel sleeve, 4 is nut, 5 is anchor rod, 6 is concrete cushion block, 7 is round wood block, 8 is wooden template, 9 1s anchoring section, and 10 is prestressing section.
DESCRIPTION OF THE INVENTION
As shown in Figure 1 or Figure 3, a prefabricated prestressed slab externally bonded to
Ni-Ti-Nb memory alloy fiber wire according to the present invention comprises a slab body and Ni-Ti-Nb memory alloy fiber wire 2, the slab body 1 is molded by high-strength grouting material, and the Ni-Ti-Nb memory alloy fiber wire 2 is arranged inside the slab body in a zigzag manner, and the Ni-Ti-Nb memory alloy fiber wire 2 comprises a plurality of wirear prestressing sections 10, and two adjacent prestressing sections 10 are connected through arc-shaped anchoring sections 9, and an embedded steel sleeve 3 is respectively arranged on the inner side of each anchoring section.
The surface of the Ni-Ti-Nb memory alloy fiber wire 2 is provided with transverse ribs.
The rib helps the Ni-Ti-Nb memory alloy fiber wire 2 to anchor in the high-strength grouting material, and promotes the cooperative work between the Ni-Ti-Nb memory alloy fiber wire 2 and the high-strength grouting material.
The Ni-Ti-Nb memory alloy fiber wire 2 is firstly stretched at normal temperature, and then left for at least 24 hours after stretching; after the shrinkage is stable, it is stretched for the second time according to its length to reach the target length. As shown in Figure 7, the calculation formula of prestress in the prestressing section 10 is as follows. i 41
In which, P represents the prestress required to be applied to the Ni-Ti-Nb memory alloy fiber wire, and » represents the number of prestressing sections; A indicates the stretching length of the prestressing section; « represents the diameter of Ni-Ti-Nb memory alloy fiber wire; / represents the length of the prestressing section before stretching.
After the high-strength grouting material is poured and molded, the Ni-Ti-Nb memory alloy fiber wire 2 is heated to restore to its original state before use, and the temperature is the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire 2 is restored to its original state, and uniform prestress is formed in the high-strength cement matrix by utilizing the shape recovery characteristics of the Ni-Ti-Nb memory alloy fiber wire 2.
After pouring high-strength grouting material, the anchoring force of anchoring section 9 of Ni-Ti-Nb memory alloy fiber wire 2 should be greater than or equal to the prestress of prestressing section 10.
The winding direction of the Ni-Ti-Nb memory alloy fiber wire 2 is determined according to the stress direction of the structure to be reinforced, that is, the prestress direction is controlled by controlling the placement direction of the Ni-Ti-Nb memory alloy fiber 2.
The concrete at the bend of the embedded steel sleeve 3 and the Ni-Ti-Nb memory alloy fiber wire 2 is in a compressed state, which enhances the anchoring strength at the bend of the Ni-Ti-Nb memory alloy fiber wire 2.
As shown in Figure 5 or Figure 6, the construction method of prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire of the present invention includes the following steps: (1) calculating the lengths of the prestressing section 10 and the anchoring section 9 of the
Ni-Ti-Nb memory alloy fiber wire 2, and appropriately increasing the length of the anchoring section 9 when the length of the anchoring section 9 is less than the length of the slab body; when the length of the prestressing section 10 1s too long and exceeds the size of the slab body, double-row and multi-row parallel Ni-Ti-Nb memory alloy fiber wire 2 are used for equal area replacement; (2) after calculating the anchoring section 9 and prestressing section 10, stretching the
Ni-Ti-Nb memory alloy fiber wire 2 at normal temperature, then letting it stand for 24 hours at normal temperature, and after its shrinkage is stable, making retest adjustment, then bending the anchoring section 9, bending Ni-Ti-Nb memory alloy fiber wire 2 according to different anchoring sections and prestress, straightening the prestressing sections 10, and bending the anchoring section 9 for later use; (3) fixing a concrete cushion block 6 at the lower part of the anchoring section 9 of the molded Ni-Ti-Nb memory alloy fiber wire 2 by adopting a fine iron wire, and reserving an iron wire at one end, wherein the concrete cushion block 6 is used for maintaining the shape of the Ni-Ti-Nb memory alloy fiber wire 2 and ensuring the thickness of the protective layer; (4) manufacturing a wooden template 8 according to the design and molding style of
Ni-Ti-Nb memory alloy fiber wire 2, and fixing a round wood block 7 with the same size as the inner diameter of the prefabricated steel sleeve on the wooden template 8 by nails at the center of bending; (5) sheathing the embedded steel sleeve 3 on the round wood block 7, winding the iron wire reserved on the concrete block on the embedded steel sleeve, fixing the Ni-Ti-Nb memory alloy fiber wire for the second time, pouring high-strength grouting material, and curing according to the specification to form a prestressed slab; (6) before use, heating the prestressed slab to the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire 2 can be restored to its original state, and applying prestress; (7) the anchor rod 5 with its end cut with silk is embedded in the structure to be reinforced, then the embedded hole on the prestressed slab 1 passes through the anchor rod 5, and finally the anchor rod 5 is locked with a nut. Specifically, as shown in Figure 1 and Figure 2, it is the installation drawing of strengthening the bending beam with the prefabricated prestressed slab 1 externally bonded to fabricated Ni-Ti-Nb memory alloy fiber wire 2. When strengthening the structure against bending, the prestressed slab 1 is installed in the bending area of the beam bottom of the structure. As shown in Figure 3 and Figure 4, it is the installation drawing of strengthening the shear beam with the prefabricated prestressed slab 1 externally bonded to fabricated Ni-Ti-Nb memory alloy fiber wire 2. During the shear strengthening of the structure, the prestressed slabs 1 are installed at the webs on both sides of the beam.
The implementation of the present invention has been described above with reference to the attached drawings, but the present invention is not limited to the above specific embodiments, which are illustrative rather than limiting the present invention. Those of ordinary skill in the art should understand that it can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features equally; however, these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present invention, but should be covered in the scope of the embodiments and specifications of the present invention.
PREFERRED EMBODIMENTS
1. A prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire, which is characterized by comprising a slab body and Ni-Ti-Nb memory alloy fiber wire, the slab body is molded by high-strength grouting material, and the Ni-Ti-Nb memory alloy fiber wire is arranged inside the slab body in a zigzag manner, and the Ni-Ti-Nb memory alloy fiber wire comprises a plurality of wirear prestressing sections, and two adjacent prestressing sections are connected through arc-shaped anchoring sections, and an embedded steel sleeve is respectively arranged inside each anchoring section. 2. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that the surface of the Ni-Ti-Nb memory alloy fiber wire is provided with transverse ribs. 3. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that before the slab body is poured, the Ni-Ti-Nb memory alloy fiber wire is firstly stretched at normal temperature, and then it is left for at least 24 hours after stretching, and after the shrinkage is stable, it is stretched for the second time according to its length to reach the target length. 4. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that: after pouring high-strength grouting material for molding, the Ni-Ti-Nb memory alloy fiber wire is heated to restore to its original state before use at the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire is restored to its original state, and uniform prestress is formed in the high-strength cement matrix by utilizing the shape recovery characteristics of Ni-Ti-Nb memory alloy fiber wire. 5. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that after pouring high-strength grouting material for molding, the anchoring force of the anchoring section of Ni-Ti-Nb memory alloy fiber wire should be greater than or equal to the prestress of the prestressing section. 6. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that the winding direction of the Ni-Ti-Nb memory alloy fiber wire is determined according to the stress direction of the structure to be reinforced, that is, the prestress direction of the board is controlled by controlling the placement direction of Ni-Ti-Nb memory alloy fiber. 7. The prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized in that the embedded steel sleeve and concrete at the bend of Ni-Ti-Nb memory alloy fiber wire are in a compressed state. 8. A construction method of prefabricated prestressed slab externally bonded to Ni-Ti-Nb memory alloy fiber wire according to embodiment 1, which is characterized by comprising the following steps: (1) calculating the lengths of the prestressing section and the anchoring section of the
Ni-Ti-Nb memory alloy fiber wire; (2) after calculating the anchoring section and prestressing section, stretching the Ni-Ti-Nb memory alloy fiber wire at normal temperature, then standing at normal temperature for 24 hours, after its shrinkage is stable, making retest adjustment, then bending the anchoring section, bending Ni-Ti-Nb memory alloy fiber wire according to different anchoring sections and prestress, straightening the prestressing sections, and bending the anchoring sections for later use; (3) fixing a concrete cushion block at the lower part of the anchoring section of the molded
Ni-Ti-Nb memory alloy fiber wire by adopting a fine iron wire, and reserving an iron wire at one end, the concrete cushion block is used for maintaining the shape of the Ni-Ti-Nb memory alloy fiber wire and ensuring the thickness of the protective layer; (4) manufacturing a wooden template according to the design and molding style of Ni-Ti-Nb memory alloy fiber wire, and fixing a round wood block with the same size as the inner diameter of the prefabricated steel sleeve on the wooden template by nails at the center of bending; (5) sheathing the embedded steel sleeve on the round wood block, winding the iron wire reserved on the concrete block on the embedded steel sleeve, fixing the Ni-Ti-Nb memory alloy fiber wire for the second time, pouring high-strength grouting material, and curing according to the specification to form a prestressed slab; (6) before use, heating the prestressed slab to the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire can be restored to its original state, and applying prestress; (7) the anchor rod with the end cut with silk is embedded in the structure to be reinforced, then the embedded hole on the prestressed slab passes through the anchor rod, and finally the anchor rod is locked with a nut.

Claims (8)

CONCLUSIESCONCLUSIONS 1. Een productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant gebonden 1s aan Ni-Ti-Nb-vezeldraad (nikkel-titanium-niobium vezeldraad) van een geheugenlegering, met het kenmerk dat de plaat een plaatlichaam en een vezeldraad van een Ni-Ti-Nb-geheugenlegering omvat, het plaatlichaam gevormd is door een zeer sterk voegmateriaal, de legeringsvezeldraad in een kronkelige vorm in het plaatlichaam wordt geplaatst, en de van Ni-Ti-Nb-vezeldraad bestaat uit een aantal draadgebonden voorspansecties, en een boogvormige verankeringssectie tussen twee aangrenzende voorspansecties wordt gestoken, en een ingebedde stalen huls is respectievelijk aangebracht binnen elke verankeringssectie.1. A production method for manufacturing a prefabricated prestressed plate bonded on the outside 1s to memory alloy Ni-Ti-Nb fiber wire (nickel-titanium-niobium fiber wire), characterized in that the plate consists of a plate body and a fiber wire of Ni-Ti-Nb memory alloy, the plate body is formed by a high-strength grouting material, the alloy fiber wire is placed in the plate body in a serpentine shape, and the of Ni-Ti-Nb fiber wire consists of a number of wire-bonded prestressing sections, and an arcuate anchoring section is inserted between two adjacent biasing sections, and an embedded steel sleeve is respectively disposed within each anchoring section. 2. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant gebonden is aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat het oppervlak van de Ni-Ti-Nb geheugenlegering vezeldraad is voorzien van dwarsribben.The production method for manufacturing a prefabricated prestressed plate bonded on the outside with Ni-Ti-Nb memory alloy fiber wire according to claim 1, characterized in that the surface of the Ni-Ti-Nb memory alloy fiber wire is provided with transverse ribs. 3. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant gebonden is aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat voordat het plaatlichaam wordt gegoten, de vezeldraad van de Ni-Ti-Nb-geheugenlegering eerst wordt uitgerekt bij normale temperatuur, en na het uitrekken ten minste 24 uur blijft staan, en nadat de krimp stabiel is, wordt het voor de tweede keer uitgerekt volgens zijn lengte om de gewenste doellengte te bereiken.The production method for manufacturing a prefabricated prestressed plate externally bonded with memory alloy Ni-Ti-Nb fiber wire according to claim 1, characterized in that before the plate body is cast, the Ni-Ti-Nb fiber wire is Ti-Nb memory alloy is first stretched at normal temperature, and after stretching is left for at least 24 hours, and after the shrinkage is stable, it is stretched for the second time according to its length to reach the desired target length. 4. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant is gebonden aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat na het gieten van hoogwaardig voegmateriaal voor het gieten, de Ni-Ti-Nb-vezeldraad van een geheugenlegering wordt verwarmd om vóór gebruik in zijn oorspronkelijke staat te herstellen bij de laagste temperatuur waarbij de vezeldraad van de Ni-Ti-Nb-geheugenlegering in zijn oorspronkelijke staat wordt hersteld, en de kenmerken van het vormherstel van de vezeldraad van de Ni-Ti-Nb-geheugenlegering dient ervoor om een uniforme voorspanning te vormen in de zeer sterke cementmatrix.The production method for manufacturing a prefabricated prestressed plate bonded on the outside with Ni-Ti-Nb memory alloy fiber wire according to claim 1, characterized in that after the casting of high-quality grouting material for casting, the Ni -Ti-Nb memory alloy fiber wire is heated to restore its original state before use at the lowest temperature at which the Ni-Ti-Nb memory alloy fiber wire is restored to its original state, and the shape recovery characteristics of the Ni-Ti-Nb memory alloy fiber thread serves to form a uniform prestress in the high-strength cement matrix. 5. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant is gebonden aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie |, met als kenmerk dat na het gieten van hoogwaardig voegmateriaal voor het gieten, de verankeringskracht van het verankeringsgedeelte van Ni-Ti- Nb-vezeldraad van geheugenlegering moet groter zijn dan of gelijk zijn aan de voorspanning van de sectie voor het aanbrengen van de voorspanning.5. The production method for manufacturing a prefabricated prestressed plate bonded on the outside with memory alloy Ni-Ti-Nb fiber wire according to claim |, characterized in that after pouring high-quality joint material for casting, the anchoring force of the anchorage section of Ni-Ti-Nb memory alloy fiber wire shall be greater than or equal to the prestress of the prestress application section. 6. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant is gebonden aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat de wikkelrichting van de vezeldraad van Ni-Ti-Nb-geheugenlegering wordt bepaald volgens de spanningsrichting van de te versterken structuur, m.a.w. de voorspanningsrichting van de plaat wordt geregeld door de plaatsingsrichting van de Ni-Ti-Nb geheugenlegeringsvezel.The production method for manufacturing a prefabricated prestressed plate bonded on the outside with Ni-Ti-Nb memory alloy fiber wire according to claim 1, characterized in that the winding direction of the Ni-Ti-Nb fiber wire is memory alloy is determined according to the stress direction of the structure to be reinforced, i.e., the biasing direction of the plate is controlled by the placement direction of the Ni-Ti-Nb memory alloy fiber. 7. De productie methode voor het vervaardigen van een geprefabriceerde voorgespannen plaat die aan de buitenkant is gebonden aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat de ingebedde stalen huls en het beton in de bocht van de Ni-Ti-Nb-vezeldraad met geheugenlegering in een gecomprimeerde staat zijn.The production method for manufacturing a prefabricated prestressed plate externally bonded with memory alloy Ni-Ti-Nb fiber wire according to claim 1, characterized in that the embedded steel shell and the concrete in the bend of the Ni-Ti-Nb memory alloy fiber wire are in a compressed state. 8. De constructiemethode van geprefabriceerde voorgespannen plaat die aan de buitenkant is gebonden aan Ni-Ti-Nb -vezeldraad van een geheugenlegering volgens conclusie 1, met als kenmerk dat de methode volgende stappen omvat: (1) het berekenen van de lengtes van het voorspangedeelte en het verankeringsgedeelte van de Ni-Ti-Nb geheugenlegering vezeldraad; (2) na het berekenen van het verankeringsgedeelte en het voorspangedeelte, de Ni-Ti-Nb-vezeldraad van de geheugenlegering bij normale temperatuur uitrekken, vervolgens 24 uur bij normale temperatuur laat staan, nadat de krimp stabiel is, opnieuw testen en vervolgens het verankeringsgedeelte buigen, het buigen van Ni-Ti-Nb-vezeldraad van de geheugenlegering volgens verschillende verankeringssecties en voorspanning, het rechttrekken van de voorspansecties en het buigen van de verankeringssecties voor later gebruik;The construction method of prefabricated prestressed sheet bonded to the outside with Ni-Ti-Nb memory alloy fiber wire according to claim 1, characterized in that the method comprises the following steps: (1) calculating the lengths of the prestressing portion and the anchoring portion of the Ni-Ti-Nb memory alloy fiber wire; (2) after calculating the anchorage section and the prestressing section, stretch the Ni-Ti-Nb memory alloy fiber wire at normal temperature, then leave it at normal temperature for 24 hours, after the shrinkage is stable, test again, and then the anchorage section bending, bending memory alloy Ni-Ti-Nb fiber wire according to different anchorage sections and prestressing, straightening the prestressing sections, and bending the anchoring sections for later use; (3) het bevestigen van een betonnen kussenblok aan het onderste deel van het verankeringsgedeelte van de gegoten Ni-Ti-Nb- vezeldraad van de geheugenlegering door een fijne ijzerdraad aan te nemen en aan één uiteinde een ijzerdraad te reserveren, het betonnen kussenblok is bedoeld voor het onderhouden van de vorm van de(3) fixing a concrete pillow block to the lower part of the anchoring part of the memory alloy cast Ni-Ti-Nb fiber wire by adopting a fine iron wire and reserving an iron wire at one end, the concrete pillow block is intended for maintaining the shape of the Ni-Ti-Nb-vezeldraad van de geheugenlegering en het waarborgen van de dikte van de beschermende laag;Memory alloy Ni-Ti-Nb fiber wire and ensuring the thickness of the protective layer; (2) het vervaardigen van een houten sjabloon volgens het ontwerp en de vormstijl van Ni-Ti-Nb-vezeldraad van de geheugenlegering, en het bevestigen van een rond houten blok met dezelfde grootte als de binnendiameter van de geprefabriceerde stalen huls op het houten sjabloon middels een spijker aan de gebogen middenpunt;(2) fabricating a wooden template according to the design and molding style of memory alloy Ni-Ti-Nb fiber wire, and fixing a round wooden block with the same size as the inner diameter of the prefabricated steel sleeve on the wooden template by means of a nail to the curved center point; (5) het omhullen van de ingebedde stalen huls op het ronde houten blok, het opwinden van de ijzerdraad gereserveerd op het betonblok op de ingebedde stalen huls, het voor de tweede keer bevestigen van de Ni-Ti-Nb-vezeldraad van de geheugenlegering, gieten van zeer sterk voegmateriaal, en uitharden volgens de specificatie om een voorgespannen plaat te vormen; (6) vóór in gebruikname, de voorgespannen plaat verwarmen tot de laagste temperatuur waarbij de Ni-Ti-Nb- vezeldraad van de geheugenlegering in zijn oorspronkelijke staat kan worden hersteld, en voorspanning toepassen;(5) sheathing the embedded steel sleeve on the round wooden block, winding the iron wire reserved on the concrete block on the embedded steel sleeve, fixing the memory alloy Ni-Ti-Nb fiber wire for the second time, casting high-strength joint material, and curing to specification to form a pre-stressed slab; (6) before use, heat the prestressed plate to the lowest temperature that can restore the Ni-Ti-Nb memory alloy fiber wire to its original state, and apply prestress; (7) de ankerstang met gegraveerde uiteinden is vooraf ingebed in de te versterken structuur en vervolgens wordt het voorgemonteerde gat op de voorgespannen plaat door de ankerstang geleid en tenslotte wordt de ankerstang vergrendeld met een moer.(7) the anchor rod with engraved ends is pre-embedded in the structure to be reinforced, and then the pre-assembled hole on the prestressed plate is passed through the anchor rod, and finally the anchor rod is locked with a nut.
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