Rapid Construction Method of Asphalt Concrete Core Wall in High Altitude Area

Abstract

The invention discloses a high-attitude-area bituminous concrete core wall rapid construction method. The high-attitude-area bituminous concrete core wall rapid construction method comprises the steps that bituminous concrete and transitional materials are simultaneously laid on a bituminous concrete base at a time, so that a bituminous concrete layer and a pair of transitional material layers located on the two sides of the bituminous concrete layer are formed on the base; three rolling machines exceeding the existing normative standards are adopted to be distributed in a delta shape to roll the bituminous concrete layer and the pair of transitional material layers; and the steps are repeated, the methods of one-time simultaneous laying and over-rolling-weight-standard rolling are adopted, and a bituminous concrete core wall which is not provided with bonding faces between every two adjacent layers and a pair of transitional material straps located on the two sides of the bituminous concrete core wall are formed. According to the high-attitude-area bituminous concrete core wall rapid construction method, the bituminous concrete and the transitional materials are simultaneously laid at a time, the laying efficiency is high, the three rolling machines are adopted for simultaneous rolling after laying, the rolling efficiency is high, the heat dissipation speed of the laid bituminous concrete is decreased, the bituminous concrete can be directly laid on the laid bituminous concrete, the construction work procedure is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a rapid construction method for asphalt concrete core walls in high-altitude areas. Background technique [0002] With the rapid development of domestic water conservancy and hydropower engineering construction, the treatment scope, depth, and stratum structure are becoming more complicated and diversified. In the prior art, when constructing asphalt concrete core wall dams, it is often necessary to follow the water conservancy and hydropower construction specifications, as stipulated in the specifications: [0003] 1. Construction can only be carried out when the minimum temperature is greater than 0°C, the wind force is less than level 4, and the daily precipitation is less than 5mm; [0004] 2. In the process of laying asphalt concrete, the surface temperature of the lower layer of asphalt concrete layer laid first must be above 70 °C before the upp...

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Problems solved by technology

[0005] 3. The thickness of the asphalt concrete layer paved in a single layer shall not be greater than 25cm;

[0009] According to the above specification, above 3,000 meters above sea level, the daily minimum temperature is less than 0°C, the wind force is greater than level 4, and the daily precipitation is greater than 5mm. At this time, the construction of the asphalt concrete core wall dam will not be possible.

[0010] However, due to the development of water conservancy and hydropower projects, it is often necessary to work in high-altitude areas. These areas are high-cold and hypoxic, and the air is thin. The amount is sometimes greater than 10mm), in these areas, the physical and mechanical properties of asphalt materials and asphalt concrete will be affected by plateau environmental factors. Quality and safety, construction methods to improve construction efficiency

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