Soil arch load shedding structure of deeply buried flood drainage channel boxes and utility tunnels and construction method thereof

Abstract

The invention discloses a soil arch load shedding structure of deeply buried flood drainage channel boxes and utility tunnels and a construction method thereof. The soil arch load shedding structure comprises a pipe gallery buried in the stratum, and a mucky soil layer of which the section is trapezoidal is formed in the central zone of the top of the pipe gallery through backfilling; and a gravelly clayey soil layer is formed in the other zones of the top of the pipe gallery through backfilling. According to the soil arch load shedding structure, a high-compressibility soil body is backfilled at the central zone of the top of the pipe gallery, a soil arch unloading effect can be formed at the top of the pipe gallery, the midspan load principal stress direction deflects to the two sides, vertical stress is reduced, midspan load and bending moment are effectively reduced, and thickness of a structural concrete layer and utilization amount of rebars are decreased; and the soil arch unloading effect is formed, mechanical properties of structural reinforcing corners and side wall concrete are exerted, side wall cracks are tightly pressed, thickness of a side wall structure and utilization amount of the reabrs are decreased, and service life of the side wall is prolonged.

Description

technical field [0001] The invention relates to the technical field of municipal underground comprehensive pipe gallery engineering, in particular to a deep-buried flood discharge channel box and a comprehensive pipe gallery earth arch load-reducing structure and a construction method thereof. Background technique [0002] With the expansion of urban construction from the riverside plain area and the extensive application of comprehensive pipe corridors, in recent years, in real estate and municipal construction, there have been more and more high-fill phenomena. The flood discharge channel boxes located in high-fill areas And integrated pipe corridors are also emerging. Since the covering soil on the top of the flood discharge channel box or comprehensive pipe gallery is filled layer by layer after the structural roof is poured, the load on the top of the structure increases rapidly with the increase of the fill height, and the bending moments at the middle and end of the r...

AI Technical Summary

Problems solved by technology

For this reason, the existing treatment method is to increase the thickness of the structural layer and increase the conventional measures of reinforcement to ensure the safety of the structure, control the width of cracks on the concrete surface, and prolong the durability of the structure, but the cost of increasing the thickness of the structural layer and reinforcement is often very high. High, and restrict the span and use space of the structure

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