Deviation correcting structure for ballastless track subgrade of high-speed railway in soft soil area

Abstract

The invention discloses a rectifying structure for a ballastless track roadbed of a soft soil area operation high-speed railway. The rectifying structure comprises a pile base reinforcing area, a foundation reinforcing cushion layer, a high-speed railway dam, a first soft stratum area, an asymmetrical load area and a second soft stratum area, wherein the pile base reinforcing area moves transversely towards the second soft stratum area; a first row of rotary-spraying piles are arranged in the second soft stratum area along a longitudinal direction; a deformed groove is formed in the asymmetrical load area; the length direction of the deformed groove is accordant with the longitudinal direction of the asymmetrical loading area; hard foam is filled into the deformed groove; a plurality of stress releasing holes are formed in the asymmetrical load area between one side of the deformed groove and one side of the pile base reinforcing area; the bottom of each stress releasing hole extends downwards, and passes through the first soft stratum area; medium-coarse sand or macadam is filled into each stress releasing hole. Acting force is applied to the deep part of a foundation, and the foundation is used for driving a roadbed body to move, so that the aim of rectifying transverse displacement of the roadbed is fulfilled.

Description

technical field [0001] The invention relates to the technical field of high-speed railway embankment disease control, in particular to a deviation-correcting structure for operating high-speed railway ballastless track embankments in soft soil areas. Background technique [0002] At present, my country's high-speed railway has basically formed a four-vertical and four-horizontal pattern. Among them, Beijing-Shanghai, Beijing-Hong Kong, Hangzhou-Fuzhou and other dedicated passenger lines pass through coastal areas where soft soil is widely distributed. Based on the advantages of long service life, good durability and small maintenance workload of ballastless track, ballastless track is widely used in high-speed railways in my country. After many years of theoretical and engineering case studies, Chinese engineers and technicians have a deep understanding of the subgrade settlement of ballastless track in soft soil areas. Usually, composite foundations, pipe piles + raft stru...

AI Technical Summary

Problems solved by technology

Due to the lack of research on the lateral deformation of the ballastless track subgrade, the understanding of the technical personnel on the lateral deformation of the subgrade is not deep enough

Engineering activities such as one-sided surcharge, foundation pit excavation, or post-maintenance asymmetric construction may cause the lateral deformation of the ballastless track subgrade in soft soil areas to exceed the limit, damage the smoothness of the track structure, and cause the train to overturn in severe cases

[0003] A large number of ballastless tracks used in my country usually use longitudinal connections, which have high longitudinal and lateral rigidity and cannot be repaired in a short period of time, and the use of traditional ballasted track push, pull, and track-shifting lateral deformation correction methods will cause great damage to the ballastless track structure and risk very high

The skylight time of the high-speed railway is short, and the operation or suspension of the high-speed railway is affected by the correction of the track structure, which not only causes economic losses, but also may have a huge negative social impact

The above factors greatly restrict the selection of the correction scheme, making it almost impossible to correct the track structure on the subgrade surface

So far, no structure has been found that does not need to interrupt operations, does not damage the track structure, and has low risk for the operation of high-speed railway ballastless track subgrade correction in soft soil areas

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