Waterproof processing construction method for framework bridge butt-connecting part

Abstract

The invention relates to a waterproof processing construction method for a framework bridge butt-connecting part. The waterproof processing construction method for the framework bridge butt-connecting part is particularly applied to the process of waterproof processing construction between a new framework and an existing framework bridge butt-connecting part after the new framework is ejected in place. The waterproof processing construction method for the framework bridge butt-connecting part comprises the following steps of removing concrete of an existing framework in a chiseling mode (steel bars are reserved), leveling the chiseled plane part of the existing framework through mortar, laying waterstop bands, erecting a formwork and pouring concrete, ejecting the framework in place, installing waterstop bands, pouring L-shaped groove concrete, cleaning impurities in stretchable seams, injecting waterstop materials, carrying out detachable waterstop band construction, carrying out EVA mortar construction, and laying top plate with waterproof coiling material wrapping outside. The waterproof processing construction method for the framework bridge butt-connecting part resolves the problems that the under water level is high and waterproof construction is difficult in the area, guarantees tight combination between the waterstop bands and an existing concrete surface of the old framework and adopts concrete with high an-seepage level, the concrete is vibrated fully, the tightness of the combination surface of the waterstop bands and the concrete is improved, and the waterproof effect is guaranteed.

Description

technical field [0001] The invention relates to a construction method for waterproofing the docking part of a frame bridge, which is specifically applied in the waterproofing construction process of the docking part of a new frame and an existing frame bridge after it is jacked into place. Background technique [0002] For the waterproof construction method between the frame bridge under the high water level and the existing frame, the traditional method is to chisel out the concrete between the existing frame, install the waterstop, and pour the concrete. It is difficult to ensure the waterproof quality between the old and new frames. General waterproof construction Ordinary concrete is used, the longitudinal reinforcement of the existing frame is not retained, it is easy to shrink after the concrete pouring is completed, and the waterproof quality cannot meet the requirements. Many construction units have some problems during waterproof construction, mainly due to the chise...

AI Technical Summary

Problems solved by technology

[0002] For the waterproof construction method between the frame bridge under the high water level and the existing frame, the traditional method is to chisel out the concrete between the existing frame, install the waterstop, and pour the concrete. It is difficult to ensure the waterproof quality between the old and new frames. General waterproof construction Ordinary concrete is used, the longitudinal reinforcement of the existing frame is not retained, it is easy to shrink after the concrete pouring is completed, and the waterproof quality cannot meet the requirements. Many construction units have some problems during waterproof construction, mainly due to the chiseled concrete If the surface is uneven, the combination of the waterstop and the frame is not dense, and it is easy to break the waterstop. The impermeability grade of the poured concrete is P8, and its impermeability is poor and the vibration is not sufficient, so that the joint cannot be easily good waterproof

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