Thermal insulation longitudinal blind pipe used in cold region highway tunnel

Abstract

The invention discloses a thermal insulation longitudinal blind pipe used in a cold region highway tunnel, and relates to the technical field of longitudinal blind pipes. The thermal insulation longitudinal blind pipe used in the cold region highway tunnel comprises an inner sleeve, a hard polyurethane thermal insulation layer and a filter assembly, wherein the inner wall of the inner sleeve is provided with a hydrophobic coating, the outer side of the inner sleeve is provided with an outer sleeve, the hard polyurethane thermal insulation layer is filled between the outer sleeve and the innersleeve, and one side of the outer sleeve is provided with a water inlet hole; and the filtering assembly is installed on the inner side of the water inlet hole, a geotextile layer is fixed on the outer side of the water inlet hole, a flow channel is arranged on the inner side of the inner sleeve, a steel wire ring is wound on the outer wall of the inner sleeve, and the fixing assembly is installedon the outer side of the outer sleeve. The thermal insulation longitudinal blind pipe used in the cold region highway tunnel has the beneficial effects that due to the arrangement of the outer sleeve, the overall strength of the blind pipe is conveniently improved, the hard PVC material can further provide higher compressive strength, the symmetrical center of the inner sleeve is superposed withthe symmetrical center of the outer sleeve, and stable assembly between the inner sleeve and the outer sleeve is facilitated.

Description

technical field [0001] The invention relates to the technical field of longitudinal blind pipes, in particular to a thermal insulation longitudinal blind pipe used in highway tunnels in cold regions. Background technique [0002] The function of the longitudinal blind pipe is to guide the water collected by the circumferential blind pipe from the tunnel lining to the horizontal drainage pipe and finally to the central ditch until it is discharged from the dark hole. [0003] The existing plastic blind pipes may freeze and accumulate ice or other threats of freezing damage during tunnel lining construction and tunnel operation in high-cold permafrost areas, resulting in a decrease in drainage performance, and are prone to become brittle and prone to damage in low-temperature permafrost environments. Due to the increased environmental pressure caused by water freezing damage, problems such as deformation and damage may occur after long-term use, which seriously affects the wat...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a thermal insulation longitudinal blind pipe used in road tunnels in cold regions, so as to solve the problem of possible frozen accumulation of plastic dead pipes proposed in the above background technology during tunnel lining construction and tunnel operation in high cold permafrost regions. Threats of ice or other freezing damage lead to a decrease in drainage performance, and it is easy to become brittle in a low-temperature permafrost environment, and it is also vulnerable to increased environmental pressure caused by water freezing damage. Long-term use may cause problems such as deformation and damage, which seriously affect the waterproof and drainage effect The problem

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