Intelligent active heat preservation and drainage system for highway tunnel in cold region

Abstract

The invention discloses an intelligent active heat preservation and drainage system for a highway tunnel. The intelligent active heat preservation and drainage system comprises a drainage device and a heating device; the drainage device comprises a central drainage ditch arranged above a maximum freezing line of a tunnel, longitudinal drainage concealed pipes and a transverse drainage pipe; the heating device comprises a control unit, and an electric tracing band and a temperature sensor connected with the control unit; and the electric tracing band is laid in the central drainage ditch and the longitudinal drainage concealed pipes in an axial direction, the temperature sensor is used for monitoring an internal temperature of the central drainage ditch and the longitudinal drainage concealed pipes, the control unit outputs action signals of the electric tracing band according to received temperature parameters, and the intelligent active heat preservation and drainage system can meet an anti-freezing heat requirement of a tunnel drainage system under a combination of different depths of frozen soil and different burying depths of the longitudinal drainage pipes, and solves problems of tedious construction and engineering waste under deep burying of the tunnel drainage system of a highway in a cold region.

Description

technical field [0001] The invention relates to the technical field of thermal insulation and antifreeze for highway tunnel drainage systems in cold regions, in particular to an intelligent active thermal insulation drainage system for highway tunnels. Background technique [0002] 1 / 4 of the world's total land area is covered by permafrost. China is the country with the third largest permafrost area in the world. The minimum monthly average temperature is below -20°C. The construction of highway tunnels in permafrost regions has extremely high requirements on the tunnel drainage system. The existing construction experience of road tunnels in some cold regions shows that if the accumulated water in the tunnel is not discharged in time, it will cause cracks and frost heave damage to the tunnel concrete lining, tunnel draft disease, local ice mounds and ice cones, frost and condensation on the wall, etc. . [0003] In response to the above diseases, the current waterproof a...

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Problems solved by technology

The anti-freezing measures of this scheme are reliable, but the disadvantage is that it causes a waste of certain engineering entities and the construction process is relatively cumbersome. Specifically, the amount of blasting increases after the vertical drainage pipe and the central drainage pipe are deeply buried, and concrete and other materials need to be backfilled later, and the cost is relatively high. High, the construction of the side walls and lateral drainage pipes on both sides of the tunnel is more difficult, and the number of blasting constructions in the central drainage ditch will cause a certain range of over-excavation. At the same time, it will cause the disturbance of the floor and bedrock to increase the construction cycle and extend the tunnel construction period. And other issues

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