Intelligent duct piece for concrete embedded air/liquid inflation steel pipe

Abstract

The invention relates to a concrete embedded air / liquid filled steel pipe intelligent duct piece, which comprises a concrete part, an air / liquid filled steel pipe and an air / liquid filled steel pipe, wherein the concrete part is used as a main stress part of the duct piece, adopts ultra-high performance concrete and is provided with a hollow part for arranging a steel pipe; the steel pipe part comprises gas / liquid inflation steel pipes which are uniformly distributed on the tension side of the duct piece and penetrate through the whole duct piece in the circumferential direction, and a gas / liquid inflation system and a gas / hydraulic control system which are connected with the steel pipes; the steel bar part comprises longitudinal bars for bearing tension, stirrups for bearing shear force and erection bars meeting the construction requirement; and the joint part comprises a circular seam joint and a longitudinal seam joint. Compared with the prior art, the pipe piece has the advantages that the self weight of the structure is effectively reduced, the rigidity and strength of the structure are improved, reinforcing bars needed by the pipe piece are greatly reduced, the stress concentration effect at the joint is effectively reduced, and the working performance such as durability, impermeability and shock resistance is superior to that of a conventional pipe piece.

Description

technical field [0001] The invention relates to the field of tunnel shield materials, in particular to an intelligent segment of a concrete-embedded gas-filled / liquid steel pipe. Background technique [0002] Shield technology is widely used in underground traffic engineering. Shield lining usually needs to withstand large water and soil pressure, and has high requirements for anti-seepage. At present, especially for river bottom tunnels and deep buried tunnels, it is difficult for conventional shield lining forms to take into account the mechanical properties and working performance requirements of the project. It is necessary to rely on methods such as large-area reinforcement and secondary lining to improve structural strength and reduce However, this method not only increases the weight of the structure and makes the construction process more complicated, but also raises the cost of the project to a certain extent. SUMMARY OF THE INVENTION [0003] The purpose of the ...

AI Technical Summary

Problems solved by technology

At present, especially for river bottom tunnels and deep-buried tunnels, it is difficult for the conventional shield lining form to take into account the engineering requirements on the mechanical properties and working performance of the structure. It is necessary to rely on large-area reinforcement and secondary lining to improve structural strength and reduce the cracks, but this method not only increases the weight of the structure, makes the construction process more cumbersome, but also increases the project cost to a certain extent

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