Heat-preservation moisture-preservation life-preserving device for tunnel lining concrete and construction method thereof

Abstract

The invention provides a heat-preservation moisture-preservation life-preserving device for tunnel lining concrete and a construction method thereof. The life-preserving device comprises a moisture-preservation layer, an electric heating layer and an air inflation heat insulating layer which are paved in sequence from inside to outside in sequence on the surface of a lining. The air inflation heat insulating layer is placed on a trolley frame. After the air inflation heat insulating layer is inflated with air, the heat insulating layer, the electric heating layer and the moisture-preservation layer are tightly attached and are tightly attached to the outer side of the lining. Through the effect of the moisture-preservation layer and the electric heating layer, the life-preserving effect of heat preservation and moisture preservation on lining concrete is achieved. The construction method comprises the steps that the air inflation heat insulating layer, the electric heating layer and the moisture-preservation layer are paved in sequence on a steel pipe of a trolley, the height of a trolley supporting steel frame and the length of an arc steel frame are adjusted, and accordingly the moisture-preservation layer is attached to the surface of the lining concrete; the air inflation heat insulating layer is inflated with air and is expanded, the electric heating layer is electrified and heated, and moisture-preservation heat-preservation maintaining is carried out on the lining concrete; and when set maintaining time is over, heating is stopped, and maintaining is over.

Description

technical field [0001] The invention belongs to the technical field of concrete maintenance, and in particular relates to a heat preservation, moisture preservation and maintenance device for tunnel lining concrete and a construction method thereof. Background technique [0002] Tunnel engineering is a typical large-volume concrete project. Due to the heat release of cement hydration, there will be a significant temperature rise, and cracks will occur due to volume shrinkage during the temperature drop process; in addition, the large-volume concrete structure will It will lose water and shrink, and it will also cause obvious cracks; because the ambient temperature of tunnels in severe cold areas is too low, the temperature difference between the inside and outside of the lining concrete is too large, and cracks are very easy to occur. If primary cracks are generated due to temperature stress during the construction of lining concrete, whether it is the water seepage problem ...

AI Technical Summary

Problems solved by technology

[0005] 1. Cement hydration exotherm is severe, which in turn leads to cracks;

[0006] 2. The concrete structure will lose water and shrink after pouring, which will lead to obvious cracks;

[0007] 3. In the external environment where the temperature is too low, the temperature difference between the inside and outside of the concrete is too large, resulting in cracks;

[0008] 4. Most of the lining of the tunnel is on the air surface, and the large-area air lining cannot be used for conventional ground concrete maintenance operations;

[0009] 5. Different tunnels have different contour shapes, and there is no maintenance device suitable for various cross-sectional shapes and sizes;

[0010] 6. The temperature and humidity of the tunnel lining concrete change too much, but the degree of change cannot be precisely controlled

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