Combined recoverable steel pipe post and deep foundation pit support method thereof

Abstract

The invention discloses a combined recoverable steel pipe post, which comprises a lower part section steel pipe, a middle part section steel pipe and an upper part section steel pipe, wherein the lower part section steel pipe is permanently inserted into a structure of a fender post and a bottom plate; the middle part section steel pipe is connected with the lower part section steel pipe; the upper part section steel pipe is connected with the middle part section steel pipe; the upper part section steel pipe and the middle part section steel pipe are connected through a steel pipe post flange;the middle part section steel pipe and the lower part section steel pipe are connected through a steel pipe post flange; the upper part of the steel pipe post flange is provided with a clamp hoop; asupport plate is arranged at the upper part of the clamp hoop; a connecting beam used for supporting a foundation pit horizontal supporter is arranged on the support plate; a rib plate is arranged atthe outer side of the clamp hoop; the top end of the upper part section steel pipe is connected with the concrete connecting beam through a flange. The combined recoverable steel pipe post of the structure is used; the field hanging, combination connection and dismounting, transferring and storage are convenient; meanwhile, the cyclic use is convenient; the construction cost is reduced; the construction risk is reduced.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit construction, in particular to a combined recoverable steel pipe column and a deep foundation pit support method thereof. Background technique [0002] Subway stations (deep foundation pits) usually use lattice columns or steel pipe columns as vertical auxiliary supports for monolithic structures with large lateral lengths. When foundation pits have large spans and the stiffness (bearing capacity) of lattice columns cannot meet the design requirements , Use steel pipe columns with larger diameters to replace lattice columns, use on-site welding to affect the construction progress, and at the same time, the length is too large and it is difficult to hoist, etc. The use of off-site overall welding will cause transportation difficulties. [0003] The fabrication and transportation of integral steel pipe columns are difficult and costly, and difficult to dismantle, which is not conducive t...

AI Technical Summary

Problems solved by technology

[0002] Subway stations (deep foundation pits) usually use lattice columns or steel pipe columns as vertical auxiliary supports for monolithic structures with large lateral lengths. When foundation pits have large spans and the stiffness (bearing capacity) of lattice columns cannot meet the design requirements , using larger diameter steel pipe columns instead of lattice columns, using on-site welding will affect the construction progress, and at the same time, the length is too large to be difficult to hoist, etc., and the use of off-site overall welding will cause transportation difficulties, etc.

[0003] Integral steel pipe columns are difficult to manufacture and transport and costly, difficult to dismantle and not conducive to reuse, and not conducive to the reduction of construction costs

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