A treatment method for controlling the mud and slopping of the subgrade of slab ballastless track railway

Abstract

The invention discloses a renovation method for treating mud pumping of a plate-type ballastless track railway roadbed. Drilling is conducted on the surface layer of a foundation bed through a special horizontal drilling machine, and then the method that hot air is injected into grouting hole passageways is adopted; accumulated water in a mud pumping disease area is subjected to treatment, and grouting is conducted in grouting holes after accumulated water treatment is completed; before grouting, telescopic seams of a base plate, cracks of the side edges and orifices of the opposite sides of the grouting holes are subjected to sealing treatment, and then grouting is successively conducted in the hole passageways according to a certain sequence; a uniform and compact water insulation layer with the certain strength is formed between the base plate and the surface layer of the foundation bed after grouting is completed; and the water insulation layer can obstruct water of cracks on the upper portion from invading into the surface layer of the foundation bed and can also block fine particle soil in the surface layer of the foundation bed on the lower portion to move upwards. According to the novel renovation method for treating mud pumping of the plate-type ballastless track railway roadbed, the mud pumping disease of the plate-type ballastless track railway roadbed can be well governed.

Description

technical field [0001] The invention relates to a treatment method for treating slab-type ballastless track roadbed slopping and mud-flowing, which is suitable for controlling the disease of high-speed railway slab-type ballastless track roadbed slopping and mud-shooting. Background technique [0002] Slurry and mud-flowing disease of railway subgrade is one of the most common roadbed diseases in my country's railways. At present, some slab ballastless track railway subgrades also have a large number of mud-flushing phenomena. During the construction of slab ballastless track railway subgrade construction, due to reasons such as poor construction control and construction quality control, the material of the subgrade bed filler (such as mineral composition, plasticity, compressibility, permeability and hydrophilicity, etc.), subgrade compaction, etc. Quality, etc. often cannot meet the design standards of high-speed railway embankment. During the long-term operation of the r...

AI Technical Summary

Problems solved by technology

At present, the treatment method of slab-type ballastless track subgrade turning mud and mud is mainly grouting treatment. Before grouting, it is necessary to carry out drainage treatment on the diseased area of ​​mud turning. The drainage of the diseased area is a rather complicated process, and the water is not easy to drain, especially It is the accumulated water with a long drainage path (such as at the center of the board), which is more difficult to drain

The accumulated water in the mud-flooding disease area cannot be drained, and the injected chemical materials will be corroded by water. At the same time, water will also accumulate between the grouting material, the surface of the subgrade bed, and the bottom of the base plate. Under the action of dynamic load, the grouting material is prone to secondary damage, thus forming a more complicated mud-flushing disease. Therefore, for areas with severe mud-flushing, conventional grouting treatment methods are difficult to solve such diseases, and the treatment The durability is poor, and the train needs to be decelerated when it is running

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