Concrete structure for supporting deep foundation pit

Abstract

The invention relates to a concrete supporting structure, in particular to a concrete structure for supporting a deep foundation pit. The concrete structure is formed by connecting a plurality of adjacent portal rigid frames through annular reinforced concrete plates on the tops of the portal rigid frames; each portal rigid frame is formed by rigidly connecting a front concrete cast-in-place pile and a rear concrete cast-in-place pile through a reinforced concrete sleeper beam and a reinforced concrete haunched node; and a triaxial stirring cement soil pile is arranged in each portal rigid frame, and each of the front concrete cast-in-place pile and the rear concrete cast-in-place pile is provided with a spiral stirrup thickened zone. The concrete structure has the advantages of reducing the construction slot time, facilitating construction and reducing the manufacturing cost.

Description

Technical field [0001] The invention relates to a concrete supporting structure, in particular to a concrete structure used for supporting a deep foundation pit, which is applied to underground engineering construction with a short construction period. Background technique [0002] At present, with the development and utilization of underground space, the excavation depth of underground engineering can reach more than 10m. The supporting structure of deep foundation pits generally adopts concrete cast-in-place piles, plus multiple cable-stayed anchor-spray piles or multiple internal supports of concrete structures. To support the three-axis mixing cement-soil water-stop curtain to prevent the slope of the top of the pit from instability, and prevent damage to surrounding buildings, pipelines or roads. [0003] However, if the structure of "concrete cast-in-place piles + multi-channel cable-stayed anchoring and spraying piles" is adopted, the anchoring and spraying piles may extend ...

AI Technical Summary

Problems solved by technology

[0003] However, if the "concrete pouring pile + multi-channel cable-stayed anchor-sprayed pile" structure is adopted, the anchor-sprayed pile may extend 20m to 50m outward along the periphery of the pit, or even extend beyond the red line of the building. On the one hand, it will affect the surrounding environment or facilities, on the other hand, because the cable-stayed anchor piles need to have enough maintenance time to make the strength meet the design requirements, so two adjacent cable-stayed anchor constructions should leave enough construction gap time, which will affect the construction of earthworks and prolong the construction period. Construction period

If the "concrete pouring pile + multi-channel concrete structure internal support" structure is adopted, there will also be more construction gap time for the concrete internal support, and the removal of the internal support will also prolong the construction period

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