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Device for reinforcing hollow slab bridge based on composite material and construction process

A technology of composite materials and hollow slabs, which is applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of high construction cost and low technical economy, and achieve the effects of high ease of construction, shortened construction period, and accelerated construction speed

Inactive Publication Date: 2021-01-05
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of strengthening hollow slab bridges is to use a large number of cement concrete, steel bars and other materials such as the method of horizontally pasting steel plates or the reinforcement of the bridge deck reinforcement method, which often has the disadvantages of low technical economy and high construction costs.

Method used

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  • Device for reinforcing hollow slab bridge based on composite material and construction process
  • Device for reinforcing hollow slab bridge based on composite material and construction process
  • Device for reinforcing hollow slab bridge based on composite material and construction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The ratio of the polyurethane cement composite material is: 24.95 parts by weight of polyester polyol, 24.95 parts by weight of isocyanate, 49.9 parts by weight of Portland cement and 0.2 part by weight of catalyst. The specific production steps are as follows:

[0045] (1) Weigh 24.95 parts by weight of polyester polyol, 24.95 parts by weight of isocyanate, 49.9 parts by weight of Portland cement and 0.2 parts by weight of catalyst.

[0046] (2), at first the polyester polyol of 24.95 weight parts and the portland cement of 49.9 weight parts are mixed in silo one, fully stir with mixer;

[0047] (3) Add 24.95 parts by weight of isocyanate into the silo for mixing, add 0.2 parts by weight of additives during the mixing process, and continue to fully stir with a mixer until the configuration of the composite material is completed.

[0048] The liquid polyurethane cement composite material obtained after configuration was injected into a small test mold to prepare a small...

Embodiment 2

[0050] The proportion of the polyurethane cement composite material is: 33 parts by weight of polyester polyol, 33 parts by weight of isocyanate, 33.8 parts by weight of Portland cement and 0.2 part by weight of catalyst. The specific production steps are as follows:

[0051] (1) Weigh respectively 33 parts by weight of polyester polyol, 33 parts by weight of isocyanate, 33.8 parts by weight of Portland cement and 0.2 parts by weight of catalyst.

[0052] (2), at first the polyester polyol of 33 weight parts and the Portland cement of 33.8 weight parts are mixed in silo one, fully stir with mixer;

[0053] (3) Add 33 parts by weight of isocyanate into the silo for mixing, add 0.2 parts by weight of additives during the mixing process, and continue to fully stir with a mixer until the configuration of the composite material is completed.

[0054] The liquid polyurethane cement composite material obtained after configuration was injected into a small test mold to prepare a small...

Embodiment 3

[0056] The proportion of the polyurethane cement composite material is: 39.95 parts by weight of polyester polyol, 39.95 parts by weight of isocyanate, 19.9 parts by weight of Portland cement and 0.2 part by weight of catalyst. The specific production steps are as follows:

[0057] (1) Weigh 39.95 parts by weight of polyester polyol, 39.95 parts by weight of isocyanate, 19.9 parts by weight of Portland cement and 0.2 parts by weight of catalyst.

[0058] (2), at first the polyester polyol of 39.95 weight parts and the portland cement of 19.9 weight parts are mixed in silo one, fully stir with mixer;

[0059] (3) Add 39.95 parts by weight of isocyanate into the silo for mixing, add 0.2 parts by weight of additives during the mixing process, and continue to fully stir with a mixer until the configuration of the composite material is completed.

[0060] The liquid polyurethane cement composite material obtained after configuration was injected into a small test mold to prepare a ...

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Abstract

The invention discloses a device for reinforcing a hollow slab bridge based on a composite material and a construction process. The device comprises 24.95 to 39.95 parts by weight of polyester polyol,24.95 to 39.95 parts by weight of isocyanate, 19.9 to 49.9 parts by weight of Portland cement and 0.2 part by weight of a catalyst, and the polyester polyol, the isocyanate, the Portland cement and the catalyst are respectively weighed. The preparation method comprises the following steps: firstly, mixing the polyester polyol and the Portland cement in a stock bin, and fully stirring by using a stirrer; and adding the isocyanate into the stock bin, mixing, adding an additive in the mixing process, and continuing to fully stir by using the stirrer until the preparation of the composite material is completed. The composite material has excellent physical properties such as water resistance, corrosion resistance and the like, is low in cost, is green and environment-friendly, and cannot cause toxicity and pollution to surrounding soil. According to the device and the construction process, disturbance to the whole construction bridge and the surrounding environment in the construction process is reduced, the construction speed of reinforcing engineering is increased, and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a device and a construction process for reinforcing hollow slab bridges based on composite materials. Background technique [0002] As a basic transportation facility, bridges are being used more and more today with the rapid development of transportation requirements. Repair, maintenance, reinforcement and transformation of existing bridges have become important topics in the field of transportation research. Hollow slabs are widely used in bridge engineering due to their advantages of light weight, mature manufacturing process, low cost and convenient installation. However, with the increase of bridge service time and the influence of heavy-load traffic and other factors, a large number of old hollow slab bridges have suffered from diseases, especially the early-built hollow slab bridges, which have low bearing capacity and are mostly connected by small groove joints. The st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 李晋管泽斌熊大路田庆斌董旭崔凤坤崔新壮
Owner SHANDONG JIAOTONG UNIV