High speed railway embankment structure in salty soil regions

Abstract

The invention discloses a high speed railway embankment structure in salty soil regions. The high speed railway embankment structure comprises a ground stabilization body arranged in soft foundation, wherein a reinforced mattress layer is laid above the ground stabilization body; a salty soil isolation layer is laid above the reinforced mattress layer; a filling embankment is laid above the salty soil isolation layer. The high speed railway embankment structure is simple in structure and convenient to construct, the reinforced mattress layer on the base is fully utilized as a carrier, the isolation measures are taken through the salty soil isolation layer made by taking a composite geomembrane or a capillary drain board as a main body, the high speed railway embankment structure is small in layer thickness and relatively low in material price and has obvious advantages compared with the measures of excavating a great quantity of salty oil, reducing underground water level, permeating water and soil or isolating asphaltic sand, the project investment can be obviously reduced, the environmental pollution is alleviated, capillary water of the salty oil can be effectively prevented from eroding the embankment body, and high service performance and long-term stability of the embankment engineering are guaranteed.

Description

technical field [0001] The invention relates to the field of high-speed railway embankment engineering, in particular to a high-speed railway embankment structure in a saline soil area. Background technique [0002] Saline soil refers to the general designation of different degrees of saline-alkali soil, which is distributed in arid, semi-arid and coastal areas in inland my country. According to the different salt types and salt content, saline soil has different degrees of undesirable properties such as moisture absorption, swelling, corrosion, and corrosion. Therefore, when building high-speed railways in saline soil areas, it is easy to cause roadbed diseases and even endanger normal operation of the train. [0003] For subgrades in saline soil sections, measures should be taken in terms of embankment height, subgrade filling, foundation treatment, slope protection and reinforcement, and capillary water separation to ensure the stability of the subgrade. Among them, in ...

AI Technical Summary

Problems solved by technology

Excavation and replacement of saline soil layer requires a large amount of work. Generally, the distribution thickness of saline soil is generally greater than 1.0m. After excavation, far qualified filler is required, and there is a problem of dumping soil, which is easy to affect the environment.

Traditional capillary water barriers include permeable soil barriers, asphalt sand barriers, etc. In saline soil areas, water-permeable soil fillers are generally lacking, and material sources are difficult and require a large amount. At the same time, there is a problem of difficulty in construction control

The measures to lower the groundwater level are mostly applicable to areas with relatively poor groundwater, and the project investment is relatively large

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