Precise installation method for expansion joint of concrete roadway type steel

Abstract

The invention relates to concrete roadway construction method, and specially a precise installation method for expansion joint of concrete roadway type steel. The method includes pre-burying expansion joint distribution steel in advance; clearing provided groove bottom, fully laying plastic cloth, filling yellow sand to bottom part of asphalt surface layer to elevation, spreading asphalt, and rolling; putting lines according to design requirement, cutting the provided expansion joint position, and clearing; welding shaped steel regulating device by adopting nuts and bolts; burying and fixing the shaped steel regulating device in reinforced concrete; installing shaped steel, preliminarily fixing steel expansion joint, and interval-fixing bolts after meeting requirement; assembling steel bars, and arranging molds; performing flatness precise detection, and adopting shaped steel regulating device to regulate flatness precise regulation; pouring steel fiber reinforced concrete; and demolding, and installing rubber water-stop belt. The invention reduces construction cost, and improves installation quality.

Description

technical field [0001] The invention relates to concrete road construction, in particular to a method for installing and constructing concrete road section steel expansion joints. Background technique [0002] In the construction of municipal, highway and bridge projects, the construction of section steel expansion joints is becoming more and more common, and the construction methods are also varied, and the construction quality is uneven. Some of these methods not only have low work efficiency, but also have not guaranteed the quality and accuracy of installation. Therefore, the characteristics of high efficiency, convenience and accuracy have not been reflected in the construction management process. For example, there are two common methods: [0003] Method 1 is to install expansion joints by using the method of steel + ruler to control the flatness: [0004] 1. In order to ensure the integrity of the concrete structure and the expansion joints, pre-buried the expansio...

AI Technical Summary

Problems solved by technology

[0011] 1. After the section steel expansion joint is fixed, its flatness cannot be adjusted again

[0012] 2. During the construction process, the local elevation of the fixed section steel expansion joints changes and cannot be adjusted again

[0013] 3. During the construction of long expansion joints, the number of profiled steels is large, and a large amount of human resources are required to set up the profiled steels, resulting in a waste of human resources

Moreover, this method requires a large amount of manpower and material resources when a large number of expansion joints are constructed at the same time.

[0014] 4. It is very difficult and cumbersome to fine-tune the elevation of the steel expansion joints

[0019] The disadvantages are: after the special-shaped steel is temporarily fixed, the elevation of the special-shaped steel will inevitably change in the process, and the flatness of the special-shaped steel cannot be adjusted again after the welding of the positioning steel plate is completed, so the flatness of the steel expansion joints cannot be satisfied. According to the design requirements, there will be a feeling of jumping when driving. At the same time, it is difficult and cumbersome to adjust the elevation of the steel expansion joints

Further, when a large number of positioning steel plates are welded, the local high temperature of the sexy expansion joint will be caused, which will cause the deformation of the section steel and affect its service life

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