High-speed railway saline soil filler embankment structure and construction method thereof

Abstract

The invention discloses a high-speed railway saline soil filler embankment structure and a construction method thereof. The embankment structure comprises an embankment lower structure, an embankmentupper structure, a heat preservation layer, an isolation device and impermeable films. The embankment lower structure comprises saline soil and is used for being filled on a foundation, the heat preservation layer is arranged at the top of the embankment lower structure, the isolation device is located at the upper end of the heat preservation layer, the embankment upper structure is filled at thetop of the isolation device, and the impermeable films are laid on side slopes on the two sides of the embankment lower structure. The heat preservation layer, the isolation device and the impermeable films can prevent temperature and water from influencing the lower structure of the embankment in the vertical direction and the slope direction; salinized soil is adopted, so that the salinized soil is not influenced by temperature and water and has relatively high stability and deformation resistance; when a high-speed railway passes through a salinized soil area and is lack of qualified filler, the feasibility of construction can be realized by arranging the heat preservation layer, the isolation device and the impermeable films on the embankment structure by adopting the salinized soil filler, and the deformation problem during construction is effectively controlled.

Description

technical field [0001] The invention relates to railway engineering, in particular to a high-speed railway saline soil filling embankment structure and a construction method. Background technique [0002] Saline soil semi-arid and arid areas and coastal areas are widely distributed in my country. This terrain is greatly affected by water and temperature, and has the characteristics of dissolution and salt expansion under the action of water and temperature. [0003] In the prior art, saline soil has related applications in highway filling, especially coarse-grained saline soil has good mechanical properties, and can be directly used as filler for expressway embankment filling, but due to post-construction subsidence of expressway subgrade The control standard is 200-300mm, and high-speed railways have very strict requirements on deformation. The post-construction settlement of ballastless track high-speed railway subgrades is required to be at the millimeter level. Generally...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of how to effectively realize the economy of high-speed railway roadbed construction and the effectiveness of deformation control when the high-speed railway passes through the saline soil area and lacks qualified roadbed fillers in the prior art. A high-speed railway saline soil filling embankment structure and construction method

Images