Construction method of thermoplastic composite die of short tie track bed

Abstract

The invention relates to the technical field of a track traffic project, in particular to a construction method of a thermoplastic composite die of a short tie track bed. In the construction method, reinforcements, square timbers and a fastener are adopted. The construction method is characterized by particularly comprising the following steps of: measuring and paying off a die control side wire; leveling the bottom fo the die by mortar; arranging the positioning reinforcements; installing the die; installing die outer bottom longitudinal square timbers and ensuring the die outer bottom longitudinal square timbers to be pressed against the die; synchronously installing a track bottom and die inner supporting square timbers; installing the fasteners to tension die top longitudinal square timbers at both sides; detecting the line shape of the die and tightening fastener buckles one by one; and pouring track bed concrete and disassembling the die. The novel thermoplastic composite die adopted by the invention has light weight and is convenient to move; two dies are fastened and connected specially by the buckles; the novel thermoplastic composite die has high stability; the die and a concrete material have the natural incompatible characteristic; the die is easy to demould, does not need to adopt a release agent, is simple to finish and is tight to splice; slurry cannot be leaked; and the die can be repeatedly turned around and used, can be recovered, processed and reutilized after being wasted, has low cost, is environment-friendly, resists to acid and alkali and various corrosions and is safe and reliable.

Description

[technical field] [0001] The invention relates to the technical field of rail transit engineering, in particular to a construction method of a thermoplastic composite template for a short-pillar track bed. [Background technique] [0002] Internationally, most of the line structures in subway tunnels use integral ballast beds and seamless lines. The commonly used integrated ballast bed has short sleeper type, long sleeper type, and later developed into a variety of types such as integral pouring type, rail bearing table type, floating slab and track slab. Among them, the construction technology of the short sleeper type integral ballast bed has been accumulated for many years, and there are many kinds. Through reasonable selection and improvement of the construction technology, the advantages can be avoided, and the construction can be shortened. Domestic rail transit viaduct decks are generally short-sleeper ballast beds, and the operation process is generally: ballast bed ...

AI Technical Summary

Problems solved by technology

In the prior art, in the process of ballast concrete support, shaped steel formwork is generally used to support the ballast concrete, such as figure 1 , figure 2 As shown, but as we all know, the steel formwork is heavy and requires frequent unloading during the construction process, which wastes manpower

Calculated on the basis of daily pouring of 150m ballast bed, 400 formworks need to be transported, with a weight of 7 tons; secondly, the steel formwork needs to be cleaned and painted with release agent every time, which will easily cause pollution and the darkening of the concrete surface of the ballast bed; in addition, assembly and disassembly Prying off and knocking during the process can easily cause the formwork to deform, which in turn affects the linear shape of the ballast bed

Therefore, the steel formwork technology in the prior art has disadvantages such as large construction costs, waste of labor, environmental pollution, and quality defects.

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