2 results about "Soil frost" patented technology

The utility model discloses a kind of roadbed anti-frost heaving structures for filling and digging transition section belong to roadbed anti-frost heaving technical field, the roadbed anti-frost heaving structure includes in vertical direction, from top to bottom sequentially arranged pavement structure layer, first medium coarse sand layer, heat insulation layer and second medium coarse sand layer;The heat insulation performance of heat insulation layer can significantly reduce the influence of external low temperature on roadbed soil, reduce the occurrence of soil frost heaving, ensure the flatness and stability of road.The first medium coarse sand layer and the second medium coarse sand layer have good water permeability, improve the drainage performance of roadbed, can promptly discharge moisture in soil, further reduce the risk of frost heaving.Through preventing roadbed frost heaving, reduce the occurrence of pavement disease, thereby prolong the service life of road, reduce maintenance cost, while the construction process of roadbed anti-frost heaving structure is relatively simple, does not need complex equipment and technology, reduces construction difficulty and cost.

The present application belongs to the technical field of cable, and discloses an anti-freezing buried cable with phase change sheath, which aims to solve the technical problem that the buried cable in cold regions is easily damaged by soil frost heaving pressure. The cable comprises an anti-freezing cable and a coaxial low-temperature phase change sheath. The sheath is composed of six or more arc-shaped splicing strips. The inner side of the splicing strip is provided with a phase change chamber filled with phase change composite material, and the outer side is provided with an air bag buffer chamber. The end part is provided with a heating belt clamped by a clamping groove. The outer side of the sheath is sequentially covered with thermal insulation cotton and a glass fiber wrapping tape corrosion-resistant layer. The present application discards the steel belt armor and relies on the synergistic effect of phase change protection, air bag buffer and active heating to improve the flexibility of the cable while ensuring the compression resistance, facilitating the laying and installation, effectively resolving the frost heaving pressure, delaying material aging, ensuring the safe operation of the cable and prolonging its service life.