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Structure capable of preventing railroad bed mud pumping and paving method thereof

A technology for railway subgrade and mud-flurrying, which is applied to roads, tracks, ballast layers, etc., can solve problems such as failure to improve the strength of the subgrade, not allowing the filling of the subgrade, and inability to reduce the dynamic stress of the train load.

Active Publication Date: 2016-08-10
GUYUAN CHENTONG TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the skylight time of the existing line is only about 2 hours, and it is not allowed to replace the filling of the subgrade bed
At present, the commonly used remediation process is to add waterproof geotextile to drainage sand cushion. This method is simple in process and can play the role of waterproof and drainage. However, the geotextile is easy to break, cannot improve the strength and stiffness of the subgrade bed, and cannot reduce the load of trains on the subgrade. Problems such as dynamic stress and other problems generated in the process, therefore, the durability is poor when used for the improvement of mud and mud on the railway subgrade

Method used

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  • Structure capable of preventing railroad bed mud pumping and paving method thereof
  • Structure capable of preventing railroad bed mud pumping and paving method thereof
  • Structure capable of preventing railroad bed mud pumping and paving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Such as figure 1 As shown, the structure to prevent the mud and mud of the railway embankment is the first protective layer 3 arranged between the surface of the railway embankment 1 and the ballast 6. The ballast 6 is laid with sleepers 7 and rails 8, and the first protective layer 3 is formed by stacking Composed of crushed stones on the surface of the railway subgrade 1 and polyurethane waterproof paint filled in the gaps between the crushed stones, the first protective layer 3 has a 5% double-sided drainage slope 5, and the water that seeps down to the first protective layer 3 is covered by the first protective layer. Layer 3 is isolated and then drained through drainage slope 5. Simultaneously, the mud that rises up is isolated by the first protection layer 3, prevents mud from turning outwards to the ballast 6 or through the ballast 6 to squeeze out.

[0017] The laying method of the structure to prevent the mud from pouring out of the railway subgrade is as foll...

Embodiment 2

[0019] Such as figure 2 As shown, the structure for preventing the mud and mud of the railway embankment includes a first protective layer 3 and a second protective layer 4 sequentially arranged on the surface of the railway embankment 1 , and a sleeper 7 and a steel rail 8 are laid on the ballast 6 . Wherein, the first protective layer 3 is composed of crushed stones accumulated on the surface of the railway subgrade 1 and polyurethane waterproof paint filled in the gaps of the crushed stones, and the first protective layer 3 has a 5% double-sided drainage slope 5 . The second protection layer 4 is formed by curing two-component polyurea waterproof coating. The water that seeps down to the second protective layer 4 is isolated by the second protective layer 4 , and then the water is discharged through the drainage slope 5 of the first protective layer 3 . Simultaneously, the mud that rises up is isolated by the first protection layer 3, and the second protection layer 4 for...

Embodiment 3

[0024] The laying method of the structure that prevents the railway subgrade from turning mud and mud is as follows: first, a uniform, dense and smooth sand cushion 2 is laid. The average particle size of the sand material in the sand cushion 2 is 3mm, and the laying thickness of the sand cushion 2 is 5cm. Then the crushed stones with an average particle diameter of 6mm are laid on the surface of the above-mentioned sand cushion 2, the laying thickness is 5cm, the transverse width B on the main line is 5m, and the distance A between its upper surface and the bottom of the sleeper 7 is 30cm; First, spray the polyurethane waterproof coating into the gravel gap along the direction perpendicular to the longitudinal direction of the line, and then spray the polyurethane waterproof coating into the gravel gap along the direction parallel to the longitudinal direction of the line, so that the polyurethane waterproof coating fills all the gravel pores, After the polyurethane waterproof...

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Abstract

The invention discloses a structure capable of preventing railroad bed mud pumping and a paving method thereof. The structure is positioned between a railroad bed and a rail roadway ballast and comprises a first protective layer and a second protective layer. The paving method of the structure comprises the following steps of: 1) paving sand aggregate with an average grain diameter of 0.05-5mm on the surface of the railroad bed so as to form a sand cushion with the a the thickness of 4-6cm; 2) paving the broken stone with an average grain diameter of 5-7mm on the surface of the sand cushion, wherein the a the paving thickness of the broken stone is 3-6cm; 3) filling broken stone clearances with a polymer waterproof coating, wherein thea first protective layer is obtained after the polymer waterproof coating is solidified; 4) spraying a polyurea waterproof coating onto the surface of the first protective layer so as to form thea second protective layer with the thickness of 2-4 mm. Water infiltrating to the second protective layer is discharged through a dewatering slope of the first protective layer; ascending mud is isolated by the first protective layer, and the second protective layer forms thea second protection, so that the mud is effectively prevented from being pumped and extruded towards the railway railroad ballast or towards the outside through the railway ballast.

Description

technical field [0001] The invention relates to a structure for preventing mud and mud flowing of a railway roadbed and a laying method of the structure. Background technique [0002] Slurry and mud-flowing disease of railway subgrade is one of the most common subgrade diseases of existing railways in my country. During the construction of traditional existing line railways, due to low design standards, insufficient understanding of subgrade structure functions, and tight construction schedules, the material (clay content, water permeability, hydrophilicity, etc.) It often fails to meet the design requirements. After many years of operation, ballast sinks into the subgrade bed frequently, the lateral drainage slope of the subgrade is damaged, and the structural layer of the ballast subgrade bed is chaotic, which seriously affects the drainage function of the subgrade bed structure and causes surface precipitation to infiltrate to the surface of the bed and cannot be dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B1/00E01B2/00
CPCE01B1/00E01B1/008E01B2/00
Inventor 苏谦刘亭王迅王武斌黄俊杰
Owner GUYUAN CHENTONG TECH DEV CO LTD
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