Plateau wet area railway embankment structure and construction method thereof

Abstract

The invention discloses a plateau wet area railway embankment structure and a construction method thereof. The embankment structure comprises a waterproof foundation bed upper surface layer, the waterproof foundation bed upper surface layer is arranged under roadbed subgrade surface, and a frost heaving resistant foundation bed lower surface layer, a micro frost heaving foundation bed bottom layer, a foundation bed water-resisting layer, a weak frost heaving body layer, a base water-resisting layer, a water passing layer and a base replacement layer are sequentially arranged under the waterproof foundation bed upper surface layer. The thickness of the base replacement layer is larger than or equal to a regional maximum freezing depth, the sum of the thicknesses of the waterproof foundationbed upper surface layer, the frost heaving resistant foundation bed lower surface layer and the micro frost heaving foundation bed bottom layer is larger than or equal to the regional maximum freezing depth, and the filling height of the water passing layer is larger than or equal to a regional maximum surface water accumulation depth. The plateau wet area railway embankment structure provided bythe invention solves the problems of roadbed waterproofing, frosting prevention and environmental protection faced by railway construction in plateau wetland, has the characteristics of novel structure, safety, reliability, convenient construction, investment saving and the like, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of roadbed engineering, in particular to a railway embankment structure in a plateau wet area and a construction method thereof. Background technique [0002] The territory of western my country is vast. With the rapid development of high-speed railways in my country and the gradual expansion of the railway network, it has become a reality to build high-grade railways in plateau environments such as western Sichuan and Tibet. There are large areas of plateau wetlands on the plateau. Plateau wetlands The water system is developed, and the groundwater and surface water are particularly rich. When the railway passes through the embankment, the impact of the surface water and groundwater on the roadbed must be resolved. It will have a great impact on the deformation of the roadbed, and even destructive effects. The conventional roadbed structure cannot meet the above requirements. Contents of the invention [0...

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Problems solved by technology

[0002] The territory of western my country is vast. With the rapid development of high-speed railways in my country and the gradual expansion of the railway network, it has become a reality to build high-grade railways in plateau environments such as western Sichuan and Tibet. There are large areas of plateau wetlands on the plateau. Plateau wetlands The water system is developed, and the groundwater and surface water are particularly rich. When the railway passes through the embankment, the impact of the surface water and groundwater on the roadbed must be resolved. It will have a great impact on the deformation of the roadbed, and even destructive effects. The conventional roadbed structure cannot meet the above requirements

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