Construction method of high attitude area bituminous concrete core wall dam

Abstract

The invention discloses a construction method of a high attitude area bituminous concrete core wall dam. The method includes the steps that bituminous concrete, a transition material, a transition dam shell material and a dam shell material are prepared; meanwhile the bituminous concrete, the transition material, the transition dam shell material and the dam shell material are laid; rolling machines exceeding an existing rolling weight standard are used for rolling the bituminous concrete layer and the transition material layer, rolling machines with the existing rolling weight standard are used for rolling the transition dam shell material layer and the dam shell material layer, and a bituminous concrete core wall dam base layer is formed; and the raw materials are laid on the bituminous concrete core wall dam base layer in a layer-by-layer mode, and the bituminous concrete core wall dam without combination surfaces formed between the adjacent layers and with field-distributed temperatures is formed. According to the method, the bituminous concrete and the transition material are laid at the same time at a time, the laying efficiency is high, the three rolling machines are adopted for simultaneous rolling after laying is completed, the rolling efficiency is high, the heat dissipation speed of the laid bituminous concrete is reduced, the bituminous concrete can be directly laid, construction procedures are 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 construction method of an asphalt concrete core dam in a high altitude area. Background technique [0002] With the rapid development of domestic water conservancy and hydropower engineering construction, the processing scope, depth, and stratigraphic structure have become complicated and diversified. In the prior art, when the asphalt concrete core wall dam is constructed, it is often necessary to follow the water conservancy and hydropower construction specifications, as specified in the specifications: [0003] 1. Construction can only be carried out when the minimum temperature is greater than 0℃, the wind 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 asphalt concrete layer laid first must be above 70℃ before the asphalt concrete layer can con...

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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;

[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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