High-speed railway embankment reinforcement structure in saline soil area

Abstract

The invention discloses a high speed railway embankment reinforcement structure of a salinized soil area. The problems of collapsibility and salt expansion of a salinized soil foundation are effectively solved, and the foundation treatment work amount and building cost of a high speed railway foundation of the salinized soil area are greatly reduced. The high speed railway embankment reinforcement structure comprises a foundation bed surface layer, a foundation bed bottom layer upper structural layer, a foundation bed bottom layer lower structural layer, a foundation body, water insulation berm structures, an upper water insulation layer and a lower water insulation. The foundation bed surface layer is arranged on the foundation face, and graded broken stone including no soluble salt is adopted for filling. The foundation bed bottom layer upper structural layer is arranged below the foundation bed surface layer, the thickness is 1.0 m, and coarse-particle soil with the soluble salt content being smaller than 0.3% is adopted for filling. The foundation bed bottom layer lower structural layer is arranged below the foundation bed bottom layer upper structural layer, the thickness is 1.3 m, and coarse-particle soil with the soluble salt content being smaller than 1.5% and the fine particle content being smaller than 5% is adopted for filling. In the foundation body, coarse-particle soil with the soluble salt content being smaller than 1.5% and the fine particle content being smaller than 5% is adopted for filling. The water insulation berm structures are arranged on slope toes on the two sides of an embankment, and coarse-particle soil with the soluble salt content being smaller than 1.5% and the fine particle content being smaller than 5% is adopted for filling. The upper water insulation layer is arranged between the foundation bed surface layer and the foundation bed bottom layer upper structural layer. The lower water insulation layer is arranged in the foundation body, and the two sides of the lower water insulation layer extend to the water insulation berm structures.

Description

technical field [0001] The invention relates to high-speed railways, in particular to a high-speed railway embankment reinforcement structure in saline soil areas. Background technique [0002] With the development of domestic high-speed railway construction and the strategy of "going out" of high-speed railways, more and more high-speed railways pass through saline soil areas, and the current criteria for judging saline soil and road use standards for filling materials for high-speed railways As well as the roadbed structure, there are few studies. If the filling without soluble salt is completely used and the measures of composite foundation reinforcement are adopted, the construction cost will be huge, and it will violate the design concept of saving and environmental protection. Therefore, roadbed reinforcement to solve such problems There is a great demand for the structure, and the social and economic benefits are huge. Contents of the invention [0003] The technic...

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Problems solved by technology

[0002] With the development of domestic high-speed railway construction and the strategy of "going out" of high-speed railways, more and more high-speed railways pass through saline soil areas, and the current criteria for judging saline soil and road use standards for filling materials for high-speed railways As well as the roadbed structure, there are few studies. If the filling without soluble salt is completely used and the measures of composite foundation reinforcement are adopted, the construction cost will be huge, and it will violate the design concept of saving and environmental protection. Therefore, roadbed reinforcement to solve such problems There is a great demand for the structure, and the social and economic benefits are huge

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