A crtsiii type ballastless track self-compacting concrete rapid moving production and construction method

Abstract

The invention belongs to the technical field of building of high speed railway ballastless tracks, and particularly relates to a self compact concrete fast moving production and construction method for a CRTSIII type ballastless track. The method comprises the steps that dry materials are firstly produced in a centralized manner in a factory according to the design proportion and stored; the construction modes matching a movable mixer truck are determined according to field conditions before construction and comprise pumping, crane bucket conveying, line-to-line carrier transferring construction and the like; material supply vehicles and water supply vehicles are organized for conveying the materials according to the work amount of the current day in the construction process and produce self compact concrete with the movable mixer truck at the construction site according to needs, and self compact concrete grouting construction is carried out through the selected construction modes; and meanwhile, the position of the movable mixer truck is adjusted in real time according to the construction progress, and the mixer truck is replenished with the materials in time through the material supply vehicles and the water supply vehicles till construction is finished. The method has the beneficial effects that the construction efficiency is high, the waste rate of self compact concrete is low, and good applicability is achieved; and the method is suitable for various bridges, roadbeds and tunnel structures under all the working conditions.

Description

technical field [0001] The invention belongs to the technical field of ballastless track construction for high-speed railways, and in particular relates to a fast-moving production and construction method for CRTSIII ballastless track self-compacting concrete. Background technique [0002] my country's high-speed railway slab ballastless track structure is divided into three types: CRTS I type slab ballastless track structure, CRTS II type slab ballastless track structure and CRTSIII type slab ballastless track structure. Among them, CRTSIII type slab ballastless track structure is my country's independent Innovate a new type of ballastless track structure with independent intellectual property rights. From the perspective of material composition, compared with the former two, the biggest difference of the CRTS III slab ballastless track is that the material of the lower adjustment layer of the track slab has changed from cement emulsified asphalt material to self-compacting ...

AI Technical Summary

Problems solved by technology

The main problems of this method are: first, the raw materials are not produced in a standardized factory, and the quality fluctuates greatly. The self-compacting concrete cannot be produced continuously and stably, resulting in a large amount of waste of self-compacting concrete.

The second is that the mixing equipment is not a special equipment, resulting in a large waste of self-compacting concrete, because the amount of self-compacting concrete in the project is much smaller than that of other structural concrete, so the existing fixed mixing station can only cross-produce other structural concrete and self-compacting concrete, frequent materials Replacement and mixed use of mixing equipment lead to the inability of continuous and stable production of self-compacting concrete with relatively high sensitivity, resulting in a large amount of waste in the actual application process; third, the position of the existing fixed mixing station cannot be moved, and the supply distance of self-compacting concrete The distance from the mixing station ranges from a few hundred meters to more than ten kilometers. Under the existing technological conditions, the existing mixing station cannot produce self-compacting concrete that meets the requirements of maintaining performance at different distances, and the tank truck transportation in actual construction cannot be guaranteed. The timely supply of self-compacting concrete leads to low construction efficiency and large waste of self-compacting concrete in the project; fourth, the existing construction technology has great limitations, and the construction method of self-compacting concrete in the case of bridges and tunnels without construction access has not been considered.

Patents "Construction technology of self-compacting concrete filling layer of high-speed railway slab ballastless track (CN201410065058)", "Low shrinkage self-compacting concrete construction method (CN201210000409)", "A self-compacting concrete pouring construction method of slab ballastless track (CN201210580739)" , "A self-compacting concrete for ballastless track and its pouring construction method (CN201210270294)" and "Self-compacting concrete pouring method under ballastless track slab (CN201210392536)" are only ways to produce self-compacting concrete in existing fixed mixing stations There is no substantial change in the production process for self-compacting concrete preparation, transportation, pouring, maintenance and tooling optimization and improvement, nor does it propose self-compacting in areas that do not have construction passages, such as bridges across rivers, mountain streams, and long tunnels. dense concrete construction method