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Hollow concrete block for protecting perenial frozen soil road bed and slope

A technology of hollow blocks and concrete, which is applied in the direction of infrastructure engineering, excavation, construction, etc., can solve the problems of lack of roadbed slope protection and unsatisfactory cooling effect, so as to facilitate the restoration of vegetation, avoid white visual pollution, The effect of preventing rainwater erosion

Inactive Publication Date: 2008-02-13
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, although the cooling effect of the sun visor is obvious, it lacks the protection of the roadbed slope; although the riprap slope protection can increase the stability of the roadbed slope, the cooling effect is not ideal

Method used

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  • Hollow concrete block for protecting perenial frozen soil road bed and slope
  • Hollow concrete block for protecting perenial frozen soil road bed and slope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The utility model relates to a concrete hollow block used for protecting the slope of permafrost roadbed. The hollow block is composed of 35% of plant straw, 20% of cement and 45% of sand. The hollow block of making is cube 1, and cube is the cube that outer side length is 50mm square, and wall thickness is 20mm (seeing figure 1).

[0027] The orange stalks are crushed and cemented through field processing or indoor factory production. Sand and soil are mixed, mixed with water and stirred evenly to form a slurry, filled into a mold to solidify, and formed into a hollow cube at one time.

[0028] Stack the hollow cubes on the slope surface of the roadbed in a certain way, or stack a layer that must be thicker than the part that needs to be cooled (see Figure 3). During the stacking process, a lot of gaps will be formed between each hollow cube 1, and at the same time, the hollow unit body itself has very large gaps, so this combination not only has a good sunshade effec...

Embodiment 2

[0030] Get 40% cement and 60% sand by weight and add water and stir evenly, and process as in Example 1. Make the hollow cylinder 2 that the outer radius is 40mm, the height is 50mm, and the wall thickness is 25mm. Stacking the hollow cylinder 2 on the slope of the road cutting can also achieve the effect of Embodiment 1.

experiment example

[0032] Comparison of indoor test results

[0033] In order to verify the effectiveness of this technology, a small indoor simulation test was carried out in the State Key Laboratory of Frozen Soil Engineering. Firstly, in a simulated laboratory with stable environmental conditions (including air temperature, humidity, and airflow), the slope of the embankment is established according to a certain ratio and slope; secondly, a certain number of radiation bulbs are installed on the top of the slope according to the same ratio of solar radiation intensity in the field. And turn it on and off at the specified time every day; place a highly sensitive thermistor temperature probe (with an accuracy of ±0.01°C) in the soil layer close to the slope to establish a temperature observation field, and the temperature observation results are controlled by the computer. The acquisition instrument automatically collects and stores; the slope is vertically divided into two areas, the left side ...

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Abstract

The hollow concrete block for protecting perennial frozen soil road bed and slope consists of plant stalks, cement, sand and soil, and is hollow cube with outer side length of 30-200 mm and wall thickness of 10-50 mm. It may be also hollow sphere, hollow cuboid or hollow cylinder. The present invention is simple in construction, low in cost, easy in maintenance, and has the merits of both sun shield and ballast revetment. Hollow blocks of different shapes are combined in certain thickness to reach excellent sun shielding effect and excellent ventilation and temperature lowering effect for protecting perennial frozen soil road bed and slope positively.

Description

technical field [0001] The invention relates to a concrete hollow block used for protecting the slope surface of permafrost roadbed. Background technique [0002] Permafrost is a kind of soil and rock with a temperature lower than 0°C and containing ice. According to the length of frozen soil preservation time, it is mainly divided into seasonal frozen soil (half a month to several months) and permafrost (more than one year). The distribution area is called For the cold area. More than 50% of the world's land area is covered by cold regions. In my country, the cold regions and permafrost account for 75% and 21.5% of the national land area. my country is the third largest country in the world with permafrost, and the area of ​​high-altitude permafrost ranks the largest in the world. [0003] Not only will the nature of frozen soil undergo complex and fundamental changes compared with thawed soil due to the existence of ice, but also in permafrost regions, through long-term ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/20
Inventor 俞祁浩程国栋何乃武
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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