CN101492908A - Construction method for improving flatness and smoothness of bridge external appearance of steel reinforced concrete - Google Patents

Abstract

The invention relates to a construction method capable of improving appearance flatness and glossiness of a reinforced concrete bridge. The method comprises the following steps: treating a foundation, chocking a sleeper, setting up an upper box girder structural bearing scaffold, arranging combined steel templates at the bottom and the lateral part of the constructed bridge, laying a layer of glass fiber board on and inside the steel templates respectively, anchoring, arranging an upper box girder structural steel bar and a corrugated pipe on and inside the glass fiber board respectively, arranging an internal mold, casting concrete and maintaining, and dismounting the combined steel templates, the glass fiber boards and the upper box girder structural bearing scaffold. The appearance flatness and the glossiness of the reinforced concrete bridge constructed by the method are changed greatly compared with the prior construction method, and the effect of mirror concrete is generated. The construction method is adopted for constructing Hubei section of Beijing-Zhuhai expressway in which 10 bridges are fully intercommunicated and Wuhan outer ring in which 4 bridges are intercommunicated, obtains excellent effects, and wins the praises from owners and supervisors.

Description

Improve the job practices of Reinforced Concrete Bridge flat appearance degree and fineness

Technical field

The present invention relates to a kind of job practices that can improve Reinforced Concrete Bridge flat appearance degree and fineness.

Background technology

Reinforced concrete construction technology has been ripe construction technology in China, for many years, how the science and technology constructor improves and has spent great energy and financial resources aspect the Surface Quality of Concrete, fast development along with Modern High-Speed highway, railway, Urban Bridge steel concrete, when improving inherent quality, more and more overcritical Surface Quality of Concrete, promptly the appearance template engine request to concrete structure is more and more higher.

Conventional and traditional method of appearance template engineering construction has three kinds: a wooden form method, a veneer method and a combined steel formwork method.

Prop up the shortcoming of wooden form method: because of it is to use timber as template and support system basically, wasted a large amount of timber resources of China, greatly destroyed ecological environment, and presentation quality has been poor.

The shortcoming of veneer method: use Strength of Plywood poor, utilize number of times few, support system will be with a large amount of timber, and Surface Quality of Concrete is poor.

Propping up the combined steel formwork method is present general mold method, but template size is less, and slit, assembling back is many, and steel form is as easy as rolling off a log simultaneously gets rusty, influenced greatly by the environment rainwater, when using, eliminate rust at every turn, brush oil and stripper plate, working procedure is many, also causes Surface Quality of Concrete undesirable.

Therefore, need seek to improve the method for Surface Quality of Concrete.

Summary of the invention

The objective of the invention is at above-mentioned present situation, aim to provide a kind of job practices of improving Reinforced Concrete Bridge flat appearance degree and fineness that can make the Reinforced Concrete Bridge outward appearance produce the effect of mirror surface concrete.

The implementation of the object of the invention is, improves the job practices of Reinforced Concrete Bridge flat appearance degree and fineness, adopts following job step:

1) carry out ground earlier and handle, bolster wood, the upper tank girder construction load-bearing scaffold of the building operations scaffold building bridge that utilization is conventional,

2) utilize conventional construction techniques to install combined steel formwork at the bottom and the sidepiece of institute's bridge construction beam,

3) on steel form and in place mat layer of glass fiber dimension plate, adopt and draw the holdfast anchoring, cleaning totally,

4) on the glass fiberboard and in installation top box-beam structure reinforcing bar, glass stria tube, install internal mold, water is rinsed the impurity on the glass fiberboard well,

5) fluid concrete and carry out maintenance outside upper tank girder construction reinforcing bar, glass stria tube, internal mold,

6) remove combined steel formwork, glass fiberboard and upper tank girder construction load-bearing scaffold.

Adopt the Reinforced Concrete Bridge appearance flatness and the fineness of the present invention's construction to obtain great change, produced the effect of mirror surface concrete than traditional job practices.

Built Jingzhu express way highway Hubei section with the present invention: 10 bridge blocks of all one's effort intercommunication; Wuhan outer shroud: 4 bridge blocks of leopard Creek intercommunication.Obtain fabulous effect, obtained the favorable comment of owner and management.

Description of drawings

Accompanying drawing is the present invention's schematic diagram of constructing

The specific embodiment

With reference to accompanying drawing, the present invention adopts following job step:

1) carry out ground 1 earlier and handle, bolster wood 2, the upper tank girder construction load-bearing scaffold 3 of the building operations scaffold building bridge that utilization is conventional, the building operations scaffolding steel pipe (￠ 48*3.5) that load-bearing scaffold 3 usefulness are conventional,

2) utilize conventional construction techniques, according to the needs of the outward appearance bed die of bridge superstructure and side form at installing combined steel formwork 4,

3) on steel form 4 and in place mat layer of glass fiber dimension plate 5, adopt and draw the holdfast anchoring, cleaning totally,

4) on glass fiberboard 5 and in installation top box-beam structure reinforcing bar, glass stria tube, install internal mold 6, water is rinsed the impurity on the glass fiberboard well,

5) fluid concrete 7 and carry out maintenance outside upper tank girder construction reinforcing bar, glass stria tube, internal mold,

6) remove combined steel formwork 4, glass fiberboard 5 and upper tank girder construction load-bearing scaffold 3, the Reinforced Concrete Bridge outward appearance with mirror surface concrete effect presents.

The glass fiberboard that adopts because of the present invention is to be soaked with the hot pressing of tung oil resin drying by the wooden oar paper of bleaching to form, have very high insulating properties, high temperature resistant, the punching performance is good, can repeatedly recycle, so can save production cost.

Claims (1)

1, improve the job practices of Reinforced Concrete Bridge flat appearance degree and fineness, it is characterized in that adopting following job step:

1) carry out ground earlier and handle, bolster wood, the upper tank girder construction load-bearing scaffold of the building operations scaffold building bridge that utilization is conventional,

2) utilize conventional construction techniques to install combined steel formwork at the bottom and the sidepiece of institute's bridge construction beam,

3) on steel form and in place mat layer of glass fiber dimension plate, adopt and draw the holdfast anchoring, cleaning totally,

4) on the glass fiberboard and in installation top box-beam structure reinforcing bar, glass stria tube, install internal mold, water is rinsed the impurity on the glass fiberboard well,

5) fluid concrete and carry out maintenance outside upper tank girder construction reinforcing bar, glass stria tube, internal mold,

6) remove combined steel formwork, glass fiberboard and upper tank girder construction load-bearing scaffold.

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