Comprehensive pipe gallery conversion vertical shaft overhead area earthwork backfilling construction method

Abstract

The invention discloses a comprehensive pipe gallery conversion vertical shaft overhead area earthwork backfilling construction method. A protection slope of a comprehensive pipe gallery in an overhead area is broken, a ladder is built in the slope face direction of the protection slope, a bearing frame is arranged on the ladder, the bearing frame is supported on the center stress point of a bottom plate of the comprehensive pipe gallery, after the bearing frame is supported on the center stress point, the overhead area is backfilled, earthwork is tamped till tamping construction cannot continue in the remaining space between the tamped earthwork and the bottom plate, a grouting pipe is buried in the bottom plate, the remaining space is filled with the earthwork to seal the overhead area, the lower end of the grouting pipe extends into the earthwork in the remaining space, the remaining space is pressurized through the grouting pipe, foam concrete is injected, and the earthwork and the foam concrete are solidified to be supported on the bottom plate. The problem that due to the fact that backfilling of the overhead area below the comprehensive pipe gallery cannot form supporting in time, comprehensive pipe gallery concrete cracking is caused is solved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an earthwork backfilling construction method for the overhead area of ​​a conversion shaft of a comprehensive pipe gallery. Background technique [0002] In building construction, the comprehensive pipe gallery is generally an underground deep foundation pit structure that adopts slope excavation, and the area where it meets the underground road and slope protection creates an overhead area. [0003] When backfilling soil in the overhead area, because the overhead area is too long and its clearance does not meet the requirements of mechanical and manpower operations, the backfilled soil cannot timely support the stress point of the excessively long overhead area, resulting in the comprehensive pipe gallery being too long. The stress concentration in the long overhead area leads to cracking of the concrete structure at the stress point. On the other hand, it brings a...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects in the existing technology, a construction method of earthwork backfilling in the overhead area of ​​the integrated pipe gallery conversion shaft is now provided to solve the problem that the backfilling of the overhead area under the integrated pipe gallery cannot form supports in time and cause the concrete of the integrated pipe gallery to crack.

Images