Subway unballasted track ditch construction method and used formwork

Abstract

The invention discloses a construction method for subway unballasted track water ditch and used formworks thereof, belonging to the field of subway construction engineering. The construction method of the invention comprises the steps as follows: (1) a suspension-typed ballasted track water ditch formwork is arranged preliminarily and the formwork is arranged and suspended from the bottom of a steel rail by a hoisting rod; (2) the length of a bolt is adjusted so as to control the height of the formwork; (3) concrete is cast at the bottom and two sides of the formwork; (4) after the strength of the concrete achieves the design requirement, the suspended hoisting rod is removed and two formworks are folded towards the middle by hinges and demoulding is carried out finally to form a whole water ditch. The formwork of the invention consists of two symmetrical L-shaped formworks; the upper part of the formwork is connected with the hoisting rod by the bolt. The construction method of the invention can complete the construction of the water ditch at one time, ensures the construction precision, simplifies the construction procedure, reduces the construction difficulty, and improves the construction progress and the construction quality; the formwork of the invention facilitates demoulding, storage and transport, can be repeatedly used and reduces the construction cost.

Description

technical field [0001] The invention relates to the field of subway construction engineering, in particular to a construction method for a subway ballastless track ditch and a template used therefor. Background technique [0002] In recent years, with the continuous development of urban construction, traffic tension has become increasingly prominent. Therefore, in order to improve the quality of urban environment, improve urban traffic conditions, and achieve sustainable urban development, major cities have begun to build subways one after another. The quality of subway construction depends to a large extent on the construction level and technology of subways. The construction of the ballast track ditch is an important part related to the smooth implementation of the subway construction project. In the past, the construction method of the ballastless track ditch was to construct the ballastless track ditch in blocks. Firstly, the bottom concrete of the ditch was constructed...

AI Technical Summary

Problems solved by technology

The existing method of block construction of ballastless track ditch has the following disadvantages: when constructing the ditch in blocks, the bottom of the ditch needs to be constructed first, and the upper part, that is, the two sides of the ditch, can only be constructed after the bottom of the ditch reaches a certain strength. The construction of the side wall is not only a complicated construction process, but also the construction progress is relatively slow, the construction accuracy is not high, the formwork cannot be accurately installed, and the longitudinal slope of the bottom of the ditch is difficult to control, which makes the slope not smooth, the drainage is not smooth, and it is easy to form water accumulation; Sub-block construction leads to weak bonding between the various parts of the ditch. Under the vibration load of subway trains, the connection parts of the ditch are prone to separation and peeling, which will cause damage to the ballast bed

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