Construction method for two-side reinforcing engineering structure

A technology of engineering structure and construction method, which is applied in the direction of bridge reinforcement, building structure, building maintenance, etc., and can solve the unfavorable application of high-strength composite prestressed tensioning and anchoring, low work efficiency, easy to damage the main steel bar, etc. problems, to achieve remarkable application effect, convenient operation, and reduce the difficulty of design and construction

Inactive Publication Date: 2008-08-20
李唐宁 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, for the reinforcement or reinforcement of large thin-walled structures (such as T-beams in bridges), during the actual construction process of fixing the wave-tooth clamp anchors, especially when bolts with larger diameters are implanted on the bottom of the T-beams, It will be interfered by the main reinforcement at the bottom of the T-beam, because the main reinforcement of the T-beam is basically distributed on the bottom of the T-beam, making it easy to damage the main reinforcement when drilling, because the main reinforcement must be better protected Therefore, it is necessary to find a suitable drilling position again, which makes the work efficiency very low, which is not conducive to the popularization and application of the patented technology of "construction method of prestressed tensioning and anchoring of high-strength composite materials"
In addition, the patented technology of "construction method for prestressed tensioning and anchoring of high-strength composite materials" is to strengthen or reinforce the outer surface of engineering structures, and for some long-span thin-walled structures (such as thin-walled box-shaped structures in bridges) Beams), due to the need to use more high-strength fiber composite material sheets for reinforcement or reinforcement, if only the outer surface of the thin wall is reinforced or reinforced, due to the large prestress in the high-strength fiber composite material sheets, Moreover, it is eccentrically stressed, so that the local stress of the thin-walled structure near the fixed wave-tooth fixture anchor is very complicated and unfavorable. If the construction of reinforcement or reinforcement on the inner and outer surfaces of the thin-walled structure is carried out separately, it will not only cost Time-consuming, but also consume more anchor bolts, increasing construction costs

Method used

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  • Construction method for two-side reinforcing engineering structure

Examples

Experimental program
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Effect test

Embodiment 1

[0030] As shown in Figures 4 to 6, a construction method for reinforcing a reinforced concrete T-beam engineering structure with a length of 30 meters, a height of 1.75 meters, and a web thickness of 0.18 meters with carbon fiber composite material sheets on both sides.

[0031] The T-shaped beam 7 has a length of 30 meters, a beam height of 1.75 meters, and a web thickness of 0.18 meters. The T-shaped beam is a prestressed reinforced concrete beam, and the prestressed steel bars 9 are mainly arranged in the horseshoe-shaped structure at the bottom of the T-shaped beam. Since the original design was based on the 20-grade load standard for automobiles, the load-carrying capacity could not meet the standard of super-20-grade vehicles for actual traffic, so it needed to be reinforced to increase its bearing capacity. If the reinforcement scheme adopts the "construction method of prestressed tensioning and anchoring of high-strength composite materials" with the patent number ZL021...

Embodiment 2

[0044] As shown in Figures 7 to 9, a construction method for reinforcing a pine square engineering structure with a length of 5 meters, a width of 0.3 meters, and a thickness of 0.2 meters with basalt fiber composite material sheets on both sides.

[0045] In many wooden structures, relatively dense wood is often used as a tension member, such as the lower chord of a wooden truss structure. There is a tension-bearing pine square 10, which is 5 meters long, 0.3 meters wide, and 0.2 meters thick. According to the needs of use, its ability to withstand tension must be improved. The method of pasting steel plates on its surface can improve its tensile strength. , but the cost of anticorrosion of steel is high and maintenance is difficult. Using the method of the present invention, using basalt fiber composite material sheet (abbreviated as BFRP sheet) 17 double-sided reinforced pine squares can also improve its tensile capacity, and the construction is convenient. Fast, in additio...

Embodiment 3

[0058] Such as Figure 10 , 11 Shown, a kind of double-sided reinforcement with glass fiber composite material sheet is a construction method for a brick wall engineering structure with a height of 3200 mm, a width of 3000 mm, and a thickness of 240 mm.

[0059] In many masonry structures (brick masonry, masonry masonry, etc.), due to their long service life or poor quality of masonry, the seismic performance of masonry structures is weak and seismic reinforcement is required. An existing brick wall needs to be reinforced against earthquakes, and its dimensions are 3200mm high, 3000mm wide and 240mm thick. If external prestressed steel bars are used for seismic reinforcement, there are problems of anti-corrosion of the prestressed steel bars and high maintenance costs in the later period. The method of the present invention can overcome this difficulty. Adopt the concrete construction steps of construction method of the present invention as follows:

[0060] (1) Bottom corr...

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Abstract

The invention relates to a construction method for double-sided enhancement or reinforcement of the engineering structures, belonging to the technical field of enhancing or reinforcing the engineering structure through high-strength fibrous composites, which is characterized in that: holes are drilled on a surface of the enhanced or reinforced civil engineering structure, and longer screws are embedded in the holes to fix two pairs of wave-shaped gear-grip anchors at the same time, so that the high-strength fibrous composite sheets can be drawn and fixed by the anchors at the two sides of the engineering structure. The construction method for double-sided enhancement or reinforcement of the engineering structures has the advantages of definite and even stressing, simple path of force transfer, convenient construction and operation, high efficiency, improving the loading capacity of the civil engineering structures and extending the service life of the civil engineering structures, and is widely used in large-scale building structures of the civil engineering, especially in the construction, reconstruction and maintenance of the large-scale thin wall structures (like T-shaped beams, etc.).

Description

1. Technical field [0001] The invention belongs to the technical field of high-strength fiber composite material reinforced or reinforced civil engineering structures, in particular to a construction method for double-sided reinforced or reinforced engineering structures. 2. Background technology [0002] With the development of the construction industry, especially the needs of large-scale building structures, civil engineering structures are required to have the characteristics of light structure, good rigidity, large spanning capacity, and strong bearing capacity. High-strength fiber composite materials such as carbon fiber reinforced plastics, polymer fiber reinforced plastics, and glass fiber reinforced plastics have the characteristics of light weight, high strength, fatigue resistance, and corrosion resistance. Ideal material for civil engineering structures such as structures. The patentee's patent number is ZL02244587.0 "high-strength composite material corrugated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02E01D22/00
Inventor 卓静李唐宁陈小英张龙生
Owner 李唐宁
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