Construction method of thermal insulation and water seepage composite underground ditch

Abstract

The invention discloses a construction method of a heat preservation porous combined blind ditch. The construction method comprises the following steps of excavation of a seepage ditch foundation pit,pavement of a mattress layer, construction of a concrete foundation, construction of a pressure foot body, installation of porous water-leaking tubes, installation of a door-type framework, installation of a side water-permeable cushion layer, construction of a covering tube cushion layer, construction of a gravel layer, construction of a medium coarse gravel layer, construction of back fill soil, installation of a heat preservation plate and construction of a coping soil layer. The construction method is easy and feasible, the obtained heat preservation porous combined blind ditch is high inindependent existence and reliable in quality, has the advantages of high water leaking efficiency, good heat preservation effect and the like for high-cold frozen earth areas, and the construction method has good economic technological benefits and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a construction method of a thermal insulation and water seepage composite underground ditch. Background technique [0002] In subgrade construction in alpine regions, groundwater is an important factor affecting the stability of subgrade engineering. The water content, water content distribution and external temperature change of the subgrade soil layer are the main factors affecting the stability of the subgrade in the alpine region. On the one hand, the penetration and erosion of groundwater will reduce the strength of the subgrade and increase the compressibility. The freezing and melting of groundwater will cause uneven lifting and sinking of the roadbed, which will cause deformation and cracks in the roadbed for a long time, affecting the quality of the roadbed. [0003] It is an effective measure to deal with the underground water of the road b...

AI Technical Summary

Problems solved by technology

The water content, water content distribution and external temperature change of the subgrade soil layer are the main factors affecting the stability of the subgrade in the alpine region. On the one hand, the penetration and erosion of groundwater will reduce the strength of the subgrade and increase the compressibility. The freezing and melting of groundwater will cause uneven lifting and sinking of the roadbed, which will cause deformation and cracks in the roadbed for a long time, affecting the quality of the roadbed

[0003] It is an effective measure to deal with the underground water of the road base in the alpine area to intercept and drain the subgrade water by using the underground ditch. This method can alleviate the damage of the groundwater to the stability of the subgrade, but the traditional underground ditch has the following defects: the integrity of the underground ditch structure is poor, and The fixation is not firm, the culvert structure is easy to slide or the relative dislocation between the internal structures of the culvert occurs during backfill construction; the side permeable cushion has poor uprightness, which makes construction difficult

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