Slip form construction method of large-fluidity paving concrete for subway rail base

Abstract

The invention discloses a slip form construction method of large-fluidity paving concrete for subway rail base. The large-fluidity paving concrete and a slip form paving machine which is adaptive to the performance of the concrete are applied. The method comprises the following steps that, (1) the slip form paving machine for the subway rail base concrete is in position and debugged; (2) the large-fluidity paving concrete is prepared and transported; (3) the concrete is loaded into a material storage bin, and the slip form paving machine is tested to carry out the slip form; (4) the slip formpaving machine is operated, and the linear shape and flatness of the concrete base are detected; and (5) the surface of the base concrete is finished and maintained. According to the slip form construction method for subway base concrete, the method is low in energy consumption, low in noise pollution and capable of continuously constructing, the automation degree of the construction process is improved, the consumption of manpower and material resources is remarkably reduced, and the method has extremely high popularization and application values.

Description

technical field [0001] The invention relates to the technical field of concrete slip form construction, in particular to a slip form construction method for paving concrete with high fluidity for subway track bases. Background technique [0002] In order to alleviate traffic pressure, the operating mileage and construction scale of subways in major cities are increasing year by year. The track bed of the subway is the main structure to bear the load of the train. It is mainly divided into an integral track bed and a gravel track bed. The integral track bed is generally used for underground lines and elevated lines. At present, the widely used integral ballast bed is mainly composed of concrete base, fasteners, elastic cushion and steel rails. The concrete base is made of concrete poured on site. Although the construction process is simple, the formwork needs to be supported before the concrete is poured. Dismantling after completion, periodic assembly and disassembly work w...

AI Technical Summary

Problems solved by technology

First of all, subway construction sites are generally located in the bustling roads of the city, and the noise of dry hard concrete vibration is large, causing sound pollution to surrounding residential areas; secondly, subway lines mainly include underground lines and elevated lines. point of difficulty

[0004] In view of the above-mentioned deficiencies, it is urgent to invent a new type of slip-form construction technology for large-fluidity paving concrete that can solve the problem of low construction efficiency and high construction noise of subway base concrete.

At present, there is no patent related to the slip-form construction technology of ground track base concrete, and there is no precedent for applying high-fluidity paving concrete to slip-form construction, but there are some patents related to concrete slip-form construction technology, such as application number 201810896335.4 named "Construction method of pouring flood drainage ditch based on portable sliding form" and application number 20180875916.X is called "a hydraulic sliding form construction method for thin-walled and high piers of bridges", but it is mainly embodied in the sliding form construction method in specific technical fields The innovation of the company still uses ordinary (low plasticity) concrete, and adopts strong vibration measures to ensure that the concrete is dense, and does not solve the defects of slipform construction from the root.

After the hard dry concrete is constructed by the slipform paver, a cement slurry band will be formed behind the vibrating rod, and the concrete is prone to cracking after hardening. Setting the vibrating rod suspended can improve this defect to a certain extent, but there are still deficiencies

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