Method for tensioning pre-stressed reinforcement of ballast-less transition sleeper of ballast-less track

Abstract

The invention discloses a method for tensioning pre-stressed reinforcement of a ballast-less transition sleeper of a ballast-less track. The method comprises the following steps of: spraying releasing agent in a cleaned steel mould shell, installing a pre-embedded casing pipe, and respectively inserting end baffles in two ends of a steel mould; threading the pre-stressed reinforcement through the end baffle at one end of the steel mould and an end plate, threading out through the end plate at the other end of the steel mould and the end baffle, taking one end of the steel mould as a tensioning end, and taking the other end of the steel mould as a fixed end; respectively installing an anchorage device and a clamping sheet at two ends of the pre-stressed reinforcement, tensioning the pre-stressed reinforcement one by one at the tensioning end through a through jack; and filling concrete in the steel mould, densely vibrating, and releasing ballast-less transition sleepers one by one after carrying out steam maintenance. According to the method disclosed by the invention, the method is simple for operation and accurate for control; technical requirements are satisfied; the tensioning working efficiency can be increased; the labour intensity of workers can be lightened; materials can be saved; and the cost is reduced.

Description

technical field [0001] The invention relates to a stretching method for a ballastless transition sleeper on a ballastless track of a railway passenger dedicated line, in particular to a stretching method for a prestressed steel bar of a ballastless transition sleeper on a ballastless track. Background technique [0002] At present, most of the production of my country's railway prestressed concrete sleepers adopts 2×5 joint steel molds, and the prestressed steel bars adopt the combined tensioning form of heading and hanging plate, and implement continuous and integral tensioning of prestressed steel bars. In this case , the tensioning equipment is required to have higher pressure and larger tonnage, the input cost of the tensioning equipment is relatively high, and the oil leakage of the high-pressure equipment during the tensioning construction process is serious, and there is environmental pollution to the working face. The prestressed steel bars are cut to a fixed length, ...

AI Technical Summary

Problems solved by technology

The overall stretching requires high prestressed steel bar blanking error and standard heading shape. If the error of prestressed steel bar length and heading operation is too large, wire slipping and broken wires will occur during the tensioning process. , once the above problems occur, the whole group of prestressed steel bars must be taken out, and the prestressed steel bar group must be replaced. The overall tension work efficiency is low, the labor intensity of workers is high, and the waste of materials is too large

Images