Construction method for rapidly repairing monolithic ballast bed settlement in skylight period

Abstract

The invention discloses a construction method for rapidly repairing monolithic ballast bed settlement in a skylight period. The repairing construction method is used for being carried out in a skylight period and comprises the following steps that height adjusting fasteners are adopted for recovering line positions, original long sleepers and surrounding ballast bed concrete are chiseled away, newshort sleepers are laid, reinforcing steel bars are implanted, formworks are erected, and pouring is carried out through polymer cement mortar. The sleeper is repaired and constructed in the skylightperiod; according to the construction method, through the polymer cement mortar, pouring and maintaining are performed to form a new ballast bed structure; rapid recovery of monolithic ballast bed settlement is realized; the construction method is small in on-site engineering quantity; the polymer cement mortar can quickly harden a ballast bed; and the ballast bed repairing construction period isshortened, an influence on operation is greatly reduced, a gap between a rail bottom and a ballast bed surface is increased through the height adjusting fasteners, a space requirement for installinga steel rail emergency device during work rush repair can be met, emergency disposal time is shortened, and the influence on train operation and passenger travel is reduced.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a construction method for quickly repairing integral ballast bed settlement within a skylight period. Background technique [0002] With the continuous improvement of the level of urban modernization in our country, the development of rapid rail transit system has become an inevitable choice for the construction of urban public transportation. However, there are obvious differences in the geological conditions of various cities. Some cities, such as Shanghai, Tianjin, Guangzhou, Hangzhou, and Ningbo, belong to soft soil areas. Such geological conditions have brought challenges to the stability of the tunnel after operation. In recent years, due to the uneven settlement of the underlying soil of the tunnel, the influence of adjacent construction, the change of ground load and water level, the asynchronous deformation of the tunnel and the station, leakage, and vibration excitation of s...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: cast-in-place rail platform ballast or pillowless ballast with cement mortar in the prior art is easy to be damaged, has poor durability, and the construction quality of the rail bottom slope is difficult to guarantee, resulting in increased rail wear and small rail bottom gaps , it is very difficult to install rail first-aid devices for emergency repairs when the rails are broken, and provide a rapid repair construction method that completes the settlement of the overall ballast bed within the skylight period

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