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Anti-freezing expansion structural body of roadbed in seasonal frozen soil region and pavement method of structural body

A technology for structures and permafrost regions, which can be applied to roads, roads, buildings, etc., and can solve problems such as long service life of roadbeds

Inactive Publication Date: 2018-06-22
张昆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long service life of roadbed

Method used

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  • Anti-freezing expansion structural body of roadbed in seasonal frozen soil region and pavement method of structural body
  • Anti-freezing expansion structural body of roadbed in seasonal frozen soil region and pavement method of structural body
  • Anti-freezing expansion structural body of roadbed in seasonal frozen soil region and pavement method of structural body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] figure 1 a is a schematic cross-sectional view of the ventilation pipe (3) passing through the block stone layer (5) in the roadbed. figure 1 b is a schematic diagram of the longitudinal section of the ventilation pipe (3) passing through the block stone layer (5) in the roadbed. An embodiment of using the single-layer ventilating pipe method and the sun-proof and cooling method, the paving method is as follows: figure 1 a, in a certain experimental section of National Highway 109 where roads are built along the river in the cold region of the north, compacted crushed gravel (6) is first filled on the compacted natural surface (17), and its thickness is 0.3m; in the crushed gravel ( 6) On the layer, pave the block stone (5) coated with the coating (10) on the surface. The coating (10) is a ZS-211 reflective heat insulation coating with a film thickness of 0.30mm; the block stone (5) or It is called flaked stone (5), the particle size is 10cm~35cm, and the thickness of...

Embodiment 2

[0093] figure 2 It is a schematic diagram of a transverse section of a highway subgrade with embedded ventilation pipes (3) and crushed stones and block stones.

[0094] An embodiment of using the single-layer ventilating pipe method and the sun-proof and cooling method, the paving method is: first fill the crushed stone (6) in the compacted crushed gravel on the compacted natural ground surface (17), and its particle size is 5mm ~70mm, first pave the thickness of 0.25m, and then pave the coating layer (10) on the surface of the crushed stone (6) with a thickness of 5cm is SPUA material, spray S-402 with JHPK-A9000 Jinghua Parker new polyurethane spraying machine Anti-corrosion and thermal insulation polyurea coating, the coating layer (10) is 2mm thick, and the thermal conductivity is 0.02-0.03W / m.k; of course, it can also be coated with ZS-1 type thermal insulation coating at room temperature, with a film thickness of 0.2mm-0.5mm; On the crushed stone (6) layer, pave a lay...

Embodiment 3

[0097] image 3 a. image 3 b. It is respectively the horizontal and vertical cross-sectional schematic diagrams of the roadbed embedded ventilation pipe (3) and crushed stones, block stones and sun-proof and cooling body (16). An embodiment of comprehensively using the single-layer ventilation pipe method, the interlayer method and the sun-proof and cooling method, the paving method is: completely in accordance with figure 2 The subgrade structure and the method of embodiment 2 are paved. which with figure 2 Slightly different: in image 3 Medium-use sunscreen cooling body (16) instead figure 2 Crushed stones (6) coated with a coating layer (10) on the middle surface. In order to save space, first illustrate the structure of the sun-proof cooling body (16) in the present embodiment: the sun-proof cooling body (16) is formed in a part of hole-shaped ventilation plate (4), block stone (5), crushed gravel (6), concrete body (7), on the surface of geosynthetic material (...

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Abstract

The invention discloses an anti-freezing expansion structural body of a roadbed in a seasonal frozen soil region and a pavement method of the structural body. The anti-freezing expansion structural body is characterized in that the anti-freezing expansion structural body comprises a perforated ventilation pipe, a chimney ventilation pipe, a hole-shaped ventilation plate, a heat insulation and cooling material, a roadbed construction and weather resistant paint. The pavement method comprises the steps of a double cloth isolation method, a chimney ventilation pipe method, a sun-proof and coolingbody method, a hole-shaped ventilation plate method and a coating method. The body is relatively simple and convenient in construction and higher in construction effect. Construction materials are low in cost, strong in weather resistance and long in service life. The body can be widely applied to newly constructed Sichuan-Tibet railway, permafrost railways and seasonal railways and highways, reduces the temperature of the roadbed comprehensively, prolongs a service life of the roadbed, and improves the stability of the roadbed and running safety of trains and automobiles.

Description

technical field [0001] The invention relates to a roadbed structure, in particular to the application technical field of a roadbed structure in a seasonal frozen soil area. Background technique [0002] According to statistics, the land area affected by seasonal freezing and thawing in areas above 30°C north latitude in my country is 513.7×10 2 Km 2 , accounting for about 53.5% of the country's land area. After the roads in these areas are built, they are affected by seasonal temperatures, and vehicles often encounter hazards such as frost heave, muddying, subsidence, and cracking on the road surface when driving. In order to prevent and avoid these diseases, the key measure of road construction is to reduce the influence of temperature on subgrade frost heave. [0003] Due to the impact of human living activities and industrialization, the global temperature has risen instead of falling. In 2016, in the "Paris Agreement on Climate Change", it is necessary to "control th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/06
CPCE01C3/06
Inventor 张昆
Owner 张昆
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