Existing railway reinforcement construction method in jacking process of box body

Abstract

An existing railway reinforcement construction method in the jacking process of a box body comprises the following steps: performing grouting treatment to railway ballast below an existing railway positioned in a to-be-jacked area, moving concrete sleepers, penetrating wooden ties among the concrete sleepers, mounting locking tracks, forming a beam arranging ditch, penetrating a beam, mounting a longitudinal beam, and the like. The method provided by the invention has the following advantages: the operation of renewing concrete sleepers is reduced, so that the damage to the original road bed/track bed is reduced, and the stability of the road bed is high; the depth of a dug ditch and the work amount of reinforcement are reduced, the construction period and the on-line operation time are shortened, and the risk of personnel safety and running of an existing railway is lowered; grouting solidification can effectively reduce the problem that vibration is caused when a train passes, so that railway ballast rolls into the ditch, and then repeated operation can be avoided; insulating boards of 3 cm in thickness and H-steel of 45 cm in height are arranged at the lower part of a steel rail, so that the reserved space is enlarged, a treatment space is provided for the rising phenomenon that possibly occurs when the box body is jacked, and running safety of the existing railway can be ensured.

Description

technical field [0001] The invention belongs to the technical field of traffic facility construction, and in particular relates to a construction method for reinforcing existing lines during box body jacking. Background technique [0002] With the rapid development of urban construction, the traffic volume is also increasing. When the existing railway crosses the highway, it is common practice to build a frame bridge under the existing railway to alleviate the traffic congestion caused by the railway line passing through the city. When some frame bridges cannot meet the traffic requirements due to their long service life or too small internal width, it is necessary to replace the old frame bridges with new ones. The commonly used replacement method at present is the jacking method. This method is to dismantle the old frame bridge while jacking one or more sections of the box body that constitutes the main body of the frame bridge from one or both sides of the existing railw...

AI Technical Summary

Problems solved by technology

[0003] However, this reinforcement method has the following problems: 1. Because the position of the concrete sleeper on the existing railway is quite different from the position of the replaced wooden sleeper, the amount of replacement required is large, the labor input is large, and the construction period is long; 2. Using this method to replace sleepers belongs to the construction of existing railway lines, so the construction risk is relatively high, and the construction operation time is long, which will inevitably increase the safety of personnel and traffic; The depth is not less than 61cm from the bottom of the rail, and it must be done manually, so the work load of trenching is heavy and the strength is high

At the same time, due to the impact of passing trains, the ballast on the side slope of the groove will roll into the ditch after being shaken, resulting in repeated operations; 4. Since the space reserved in this form is small, if the box body is jacked If there is a phenomenon of head-up during the process, it will not be able to deal with it effectively, which will directly affect the stability of the existing line

Images