The invention discloses application of a transparent wall vent
pipe-massive
crushed stone layer cooling and insulating composite road
bed in a wide road. The structure of the road
bed consists of a transparent wall vent
pipe, a massive
crushed stone layer,
geotextile, an insulating layer and road
bed filling soil; the massive
crushed stone layer is paved on a compacted natural ground surface; the transparent wall vent
pipe is embedded into the top of the massive crushed stone layer; and then, the
geotextile, the insulating layer and the road bed filling soil are paved on the massive crushed stone layer in turn. By using the transparent wall vent pipe, the temperature of the top of the massive stone layer is reduced, the
temperature difference between the upper and lower boundaries of the massive stone layer is increased,
natural convection of the massive stone layer in a
cold season is enhanced, and the cold
energy absorption amount of the road bed in the
cold season is improved; and by combining the heat insulation property of the insulating layer, the absorption amount is effectively controlled in a
warm season, and the net heat release amount of the road bed in a freezing and thawing cycle is greatly improved so as to realize reduction of underlying
soil temperature of the wide high-grade road bed, balance the temperature field, promote the upper limit of frozen soil and meet the special requirement of stability of the wide high-grade road bed in a high-temperature
permafrost.