CN210420907U

CN210420907U - Precast beam containing prestressed steel wire rope and reinforcing cushion layer

Info

Publication number: CN210420907U
Application number: CN201921329386.5U
Authority: CN
Inventors: 孙全胜; 贾东哲; 王朝伟; 郭力强
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-04-28
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses a contain precast beam of prestressing wire rope and reinforcement bed course, including the bridge roof beam body, be provided with the ECC back up coat on the bridge roof beam body, the lower extreme surface of the bridge roof beam body is provided with planar pressure sensor, bridge roof beam body internally mounted has the stretch-draw end ground tackle, and the stretch-draw end ground tackle is connected with the stiff end ground tackle through the prestressing wire rope, it is fixed mutually with first steel sheet that the stretch-draw end ground tackle passes through the welding, and first steel sheet passes through the bolt firmware and is fixed mutually with the bridge roof beam body, the stiff end ground tackle is fixed mutually through welding and second steel sheet, and the second steel sheet passes through the bolt firmware and is fixed mutually with the bridge roof beam body, the inside cement layer that is provided with of ECC back up coat, is provided with the fly ash layer. The utility model discloses the bridge carries the effect obvious, and the rigidity and the intensity of girder all have obvious improvement after consolidating, and the original atress crack of bridge all has the certain degree return and contracts, and the girder has certain safe deposit than former bridge, and the atress performance is better.

Description

Precast beam containing prestressed steel wire rope and reinforcing cushion layer

Technical Field

The utility model relates to a bridge engineering technical field specifically is a contain precast beam of prestressing force wire rope and reinforcement bed course.

Background

The bridge construction engineering belongs to a more important and basic component in the road transportation process at the present stage, and can promote the development and progress of road construction. Can utilize multiple way and mode to promote bridge construction quality among the bridge construction process, nevertheless because the influence of factors such as natural factor, temperature, environment, humidity, service life, bearing capacity, the damage phenomenon that the degree differs often appears in the bridge use, can't satisfy people's normal trip demand, if carry out effectual bridge detection and implement the reinforcement technology in time, probably lead to comparatively serious quality safety accident's emergence. Therefore, the technology for reinforcing the bridge is very important.

The traditional concrete is always troubled by the defects of poor fracture toughness, high brittleness, easy cracking, difficult crack width control and the like. Although the steel industry advances, the reinforcing steel bars and the concrete are used together to overcome the defects of high brittleness and the like of the concrete, the concrete works together with the occurrence and the development of cracks, so that the reinforcing steel bars are easy to corrode, the structural bearing capacity is easy to reduce, and the maintenance is difficult and the cost is high. The inherent disadvantages of concrete are not fundamentally solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an include precast beam of prestressing wire rope and reinforcement bed course to there is not enough, the dead weight of new and old concrete faying face intensity, increases great, the tensile strength improves unobvious scheduling problem in the bridge reinforcing apparatus who provides in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a precast beam of interior prestressing wire rope and reinforcement bed course, includes the bridge roof beam body, be provided with the ECC strengthening layer on the bridge roof beam body, the lower extreme surface of the bridge roof beam body is provided with planar pressure sensor, bridge roof beam body internally mounted has the stretch-draw end ground tackle, and the stretch-draw end ground tackle is connected with the fixed end ground tackle through the prestressing wire rope, it is fixed mutually with first steel sheet to stretch-draw end ground tackle through the welding, and first steel sheet is fixed mutually with the bridge roof beam body through the bolt fastening, the fixed end ground tackle is fixed mutually with the second steel sheet through the welding, and the second steel sheet is fixed mutually with the bridge roof beam body through the bolt fastening, the inside cement layer that is provided with of ECC strengthening layer, is provided with the fly ash layer below the.

Preferably, the fly ash layer is mutually adhered to the mortar layer through a mixing agent.

Preferably, the bottom of the mortar layer is adhered to the fiber layer through the water reducing agent layer.

Preferably, the output end of the planar pressure sensor is electrically connected with the input end of the analog-to-digital converter.

Preferably, the output end of the analog-to-digital converter is electrically connected with the input end of the acquisition circuit.

Preferably, the upper end of the fixed end anchorage device is provided with a U-shaped clamping groove.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses applied two kinds of reinforced materials of prestressing force wire rope and ECC material, adopted a U type bridge reinforced structure, this reinforced structure is applicable to the reinforcement of housing construction and other building structures simultaneously, not only can effectually improve normal use limit bearing capacity, fracture load, yield load and bending deformation ability, and the bonding property of ECC material and original concrete, wire rope is good simultaneously, can full play good tensile characteristic and the crack dispersion ability of ECC material, is difficult for droing to promote wire rope durability;

(2) the utility model influences and changes the internal force distribution of the original structure, thereby reducing the original stress level of the bridge structure and improving the bearing capacity of the bridge, and has triple effects of reinforcing, unloading and changing the internal force of the structure; the reinforcement system formed by the ECC and the small-diameter prestressed steel strands is analyzed, and finite element parameter analysis of the bending-resistant reinforcement beam shows that the cracking load and the yield load of a reinforcement member are both improved to a greater extent along with the increase of the tensile control stress of the steel wire rope, and the greater the tensile control stress of the steel wire rope is, the greater the improvement degree of the anti-cracking performance and the bearing capacity of the reinforced beam is; in the actual reinforcing engineering, the bridge lifting effect is obvious, the rigidity and the strength of the main beam are obviously improved after the main beam is reinforced, the original stress cracks of the bridge retract to a certain degree, the main beam has certain safe storage compared with the original bridge, and the stress performance is better.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a cross-sectional view of the tension end anchor of the present invention;

FIG. 4 is a cross-sectional view of a fixed end anchor of the present invention;

FIG. 5 is a schematic view of the inner structure of the ECC reinforcing layer of the present invention;

fig. 6 is a schematic diagram of the circuit structure of the present invention.

In the figure: 1. a bridge beam body; 2. a pre-stressed steel wire rope; 3. a tension end anchorage; 4. a fixed end anchorage device; 5. a planar pressure sensor; 6. a bolt fastener; 7. an ECC reinforcing layer; 8. a first steel plate; 9. a second steel plate; 10. a cement layer; 11. a layer of fly ash; 12. a mortar layer; 13. a water reducing agent layer; 14. a fibrous layer; 15. an analog-to-digital converter; 16. and an acquisition circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-6, the present invention provides an embodiment: a precast beam containing prestressed steel wire ropes and a reinforcing cushion layer comprises a bridge body 1, an ECC reinforcing layer 7 is arranged on the bridge body 1, a planar pressure sensor 5 is arranged on the lower end surface of the bridge body 1, the planar pressure sensor 5 is adopted to collect the stress variation of the bridge body 1 when the load changes, the number of the prestressed steel wire ropes 2 used for reinforcing the bridge is determined according to the stress variation, a tensioning end anchorage device 3 is arranged in the bridge body 1, the tensioning end anchorage device 3 is connected with a fixed end anchorage device 4 through the prestressed steel wire ropes 2, the tensioning end anchorage device 3 is fixed with a first steel plate 8 through welding, the first steel plate 8 is fixed with the bridge body 1 through a bolt fastener 6, the fixed end anchorage device 4 is fixed with a second steel plate 9 through welding, the second steel plate 9 is fixed with the bridge body 1 through the bolt fastener 6, a cement layer 10 is arranged in the ECC reinforcing layer 7, a fly ash layer 11 is arranged below the cement layer 10.

Further, the fly ash layer 11 is adhered to the mortar layer 12 through a mixture.

Further, the bottom of the mortar layer 12 is adhered to the fiber layer 14 through the water reducing agent layer 13, the ECC reinforcing layer 7 is made of a high-performance fiber reinforced cement-based material, and the high-performance fiber reinforced cement-based material is formed by mixing cement, fly ash, sand, water, a water reducing agent and fibers and has the advantage of high structural strength.

Further, the output end of the planar pressure sensor 5 is electrically connected with the input end of the analog-to-digital converter 15.

Further, the output end of the analog-to-digital converter 15 is electrically connected with the input end of the acquisition circuit 16, the sensing plate of the planar pressure sensor 5 is parallel to the ground, the planar pressure sensor 5 measures the stress variation when the load on the bridge beam body 1 changes, the planar pressure sensor 5 outputs the stress variation to the analog-to-digital converter 15 through the pressure analog signal output end, and the digital signal output end of the analog-to-digital converter 15 is connected with the digital signal input end of the acquisition circuit 13.

Further, the upper end of the fixed end anchorage device 4 is provided with a U-shaped clamping groove.

The working principle is as follows: when in use, a tensioning end anchorage device 3 is arranged in a bridge beam body 1, the tensioning end anchorage device 3 is connected with a fixed end anchorage device 4 through a prestressed steel wire rope 2, the tensioning end anchorage device 3 is fixed with a first steel plate 8 through welding, the first steel plate 8 is fixed with the bridge beam body 1 through a bolt fastener 6, the fixed end anchorage device 4 is fixed with a second steel plate 9 through welding, a planar pressure sensor 5 is arranged on the lower end surface of the bridge beam body 1, the planar pressure sensor 5 is adopted to collect the stress variation of the bridge beam body 1 when the load changes, the number of the prestressed steel wire ropes 2 used for reinforcing the bridge is determined according to the stress variation, a sensing plate of the planar pressure sensor 5 is parallel to the ground, the planar pressure sensor 5 determines the stress variation when the load changes of the bridge beam body 1, and the planar pressure sensor 5 outputs the stress variation to an analog-to-digital converter 15 through a pressure analog signal output end, the digital signal output end of the analog-to-digital converter 15 is connected with the digital signal input end of the acquisition circuit 13, along with the increase of the tension control stress of the prestressed wire rope 2, the cracking load and the yield load of the reinforcement component are both improved to a large extent, and the larger the tension control stress of the prestressed wire rope 2 is, the larger the improvement degree of the crack resistance and the bearing capacity of the reinforced back beam is, the ECC reinforcement layer 7 is made of a high-performance fiber reinforced cement-based material, the high-performance fiber reinforced cement-based material is formed by mixing cement, fly ash, sand, water, a water reducing agent and fibers, and has the advantage of high structural strength, meanwhile, the ECC reinforcement layer 7, the original concrete and the steel wire rope are good in bonding performance, the good tensile property and crack dispersion capacity of the ECC reinforcement layer 7 can be fully exerted, the ECC reinforcement layer is not easy.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A precast beam containing prestressed steel wire ropes and a reinforcing cushion layer comprises a bridge body (1) and is characterized in that an ECC reinforcing layer (7) is arranged on the bridge body (1), a planar pressure sensor (5) is arranged on the surface of the lower end of the bridge body (1), a tensioning end anchorage device (3) is arranged in the bridge body (1), the tensioning end anchorage device (3) is connected with a fixed end anchorage device (4) through the prestressed steel wire ropes (2), the tensioning end anchorage device (3) is fixed with a first steel plate (8) through welding, the first steel plate (8) is fixed with the bridge body (1) through a bolt fastener (6), the fixed end anchorage device (4) is fixed with a second steel plate (9) through welding, the second steel plate (9) is fixed with the bridge body (1) through the bolt fastener (6), a cement layer (10) is arranged in the ECC reinforcing layer (7), a fly ash layer (11) is arranged below the cement layer (10).

2. The precast beam containing the prestressed wire rope and the reinforcing mat layer according to claim 1, wherein: the fly ash layer (11) is mutually adhered with the mortar layer (12) through a mixing agent.

3. The precast beam including the prestressed wire ropes and the reinforcing mat according to claim 2, wherein: the bottom of the mortar layer (12) is adhered to the fiber layer (14) through a water reducing agent layer (13).

4. The precast beam containing the prestressed wire rope and the reinforcing mat layer according to claim 1, wherein: the output end of the planar pressure sensor (5) is electrically connected with the input end of the analog-to-digital converter (15).

5. The precast beam containing prestressed wire ropes and a reinforcing mat layer according to claim 4, wherein: the output end of the analog-to-digital converter (15) is electrically connected with the input end of the acquisition circuit (16).

6. The precast beam containing the prestressed wire rope and the reinforcing mat layer according to claim 1, wherein: the upper end of the fixed end anchorage device (4) is provided with a U-shaped clamping groove.