Plateau wet area railway embankment structure and construction method thereof
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology in areas and plateaus, applied in infrastructure engineering, roads, excavation, etc., can solve problems such as destructive impact, large temperature difference between day and night, and roadbed deformation, so as to save investment, simplify construction procedures, and reduce roadbed deformation.
Pending Publication Date: 2020-06-09
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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[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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Embodiment 1
[0032] like figure 1 As shown, a railway embankment structure in a plateau wet area, including a waterproof subgrade surface layer 1, an anti-frost heave subsurface layer 2, a slight frost heave subgrade bottom layer 3, a subgrade bed water-resistant layer 4, a weak frost heave body layer 5, and a base The water-proof layer 6, the water-passing layer 7 and the base replacement layer 10, the surface layer 1 of the waterproof foundation bed is arranged below the subgrade surface, and the lower surface layer 2 of the anti-frost foundation bed is arranged successively below the surface layer 1 of the waterproof foundation bed. The bottom layer 3 of the slight frost heave foundation bed, the water-proof layer 4 of the foundation bed, the weak frost-heave body layer 5, the base water-proof layer 6, the water-passing layer 7 and the base replacement layer 10 .
[0033] The surface layer 1 on the waterproof foundation bed is filled with high-performance asphalt concrete, and its thic...
Embodiment 2
[0039] A construction method for a railway embankment structure in a plateau wet area, constructing the plateau wet area railway embankment structure as described in embodiment 1, comprising the following steps:
[0040] Step 1: Excavate the frost heaving soil within a certain depth range of the base, and the excavation depth is greater than or equal to the maximum freezing depth h in the area f , constructing the base replacement layer 10 in the excavated area;
[0041] Step 2: fill the water-passing layer 7 in layers, and the filling height of the water-passing layer 7 is greater than or equal to the maximum surface water depth h in the area w ;
[0042] Step 3: constructing the base water-resisting layer 6 on the top surface of the water-passing layer 7, and the thickness of the base water-resisting layer 6 is greater than or equal to 10 cm;
[0043] Step 4: Filling the weak frost-heave body layer 5, after the weak frost-heave body layer 5 passes the test, construct the f...
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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...
Claims
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Application Information
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