Temporary overwintering heat preservation method for mass concrete in alpine regions

Abstract

The invention discloses a temporary overwintering heat preservation method for mass concrete in alpine regions. The method is characterized by being composed of a temporary overwintering heat preservation method for horizontal surface concrete in the alpine regions, a temporary overwintering heat preservation method for side surface concrete in the alpine regions and a temporary overwintering heatpreservation method for exposed structures such as an aperture in the alpine regions. The surface of the concrete is covered with an isolation layer, a heat preservation layer, a waterproof layer anda windproof wall, a plastic film serves as the isolating layer, rubber-plastic sponge serves as the heat preservation layer, three-proofing canvas serves as the waterproof layer, and the windproof wall is arranged by using sand bags; XPS benzene plates are adopted as the heat preservation layer for the vertical surface or side surface concrete; and the temporary overwintering heat preservation method for the exposed structures comprises the following steps that a scaffold is erected on the overwintering surface of one exposed structure and the overwintering surface is covered with flat plates, so that the overwintering surface becomes a flat surface, and then the flat surface is covered with the isolation layer, the heat preservation layer and the waterproof layer. According to the temporary overwintering heat preservation method for the mass concrete in the alpine regions, the rubber-plastic sponge and the XPS benzene plates are organically combined to serve as the heat preservationmaterial for covering the overwintering surface of the concrete, thus the construction progress is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the field of building construction heat preservation, and is especially suitable for temporary overwintering heat preservation construction of large-volume concrete in severe cold regions. Background technique [0002] There are not many engineering practices for building dams with roller compacted concrete in severe cold areas. Many projects have huge engineering quantities and long construction periods, requiring years of construction. Among them, doing a good job of temporary insulation of the dam surface during winter is to ensure the appearance quality of the dam, the strength of the concrete and The key to quality and the smooth resumption of work in the coming year. [0003] Large-volume concrete in alpine regions: refers to high latitude (41° north latitude) and above, the lowest temperature in winter is below -25°C, large-volume refers to one-time pouring of 1000m 3 For the above concrete, the temporary overwintering ...

AI Technical Summary

Problems solved by technology

Especially for the overwintering layer concrete poured in the first year of the construction process of large hydraulic structures, it is generally located in the strong constraint area of ​​the foundation. The thickness of the concrete pouring layer in this part is relatively thin and it is also the main part of the dam under stress, so it is difficult to control the temperature , it is necessary to cover a large number of insulation quilts, and as the thickness of the insulation quilt increases, the project cost will also increase

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