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Circumferential intelligent reinforcement structure and reinforcement method of shield tunnel

A technology for strengthening structures and shield tunnels. It is used in tunnels, tunnel linings, and earth-moving drilling and mining. It can solve problems such as structural performance changes and deficiencies, and achieve the effect of improving service life, simple facilities, and ensuring personal and property safety.

Active Publication Date: 2017-02-22
SOUTHEAST UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the reinforcement, the long-term durability of the material needs to be considered, but the currently commonly used reinforcement technology based on steel materials is obviously insufficient; at the same time, the change of the structural performance after reinforcement is also a concern of the owners and engineers

Method used

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  • Circumferential intelligent reinforcement structure and reinforcement method of shield tunnel
  • Circumferential intelligent reinforcement structure and reinforcement method of shield tunnel

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Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Such as figure 1 As shown, the shield tunnel is composed of concrete segments 1 and segment joints 2, and intelligent fiber composite bars 3 are laid along the inner wall of the tunnel, and then a high-viscosity bonding material 4 is applied to form a good structural layer. When arranging intelligent fiber composite bars, it is necessary to arrange the segment joint 2 as far as possible in the middle of the gauge length. During normal use after reinforcement, using the structural hoop strain distribution monitored by the smart fiber composite reinforcement 3, the convergence of the structure can be calculated and the performance change of the structure can be judged through the structural mechanics model, such as the conjugate beam model.

[0022] Such as figure 2 As shown, the smart fiber composite rib 3 is internally compounded with a long-gauge optical fiber, that is, the long-gauge optical fiber is used as the inner core of the smart fiber composite rib 3 . A typ...

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Abstract

The invention discloses a circumferential intelligentized reinforcement structure and method of a shield tunnel. A reinforcing and monitoring integrated structure is formed through intelligent fiber composite ribs with built-in distributed optical fiber sensors, circumferentially arranged along the inner side surface of the tunnel. The method comprises the following steps: bonding intelligent FRP (fiber reinforced plastic) ribs with the inner side of the tunnel through bonding materials to form a structure layer with good mechanical property; calculating the circumferential convergence of the structure by monitored circumferential strain, and judging the performance change of the reinforced structure. According to the circumferential intelligentized reinforcement structure and method, facilities are simple, the engineering construction is convenient, the difficult problem of reinforcing and monitoring integration of the conventional shield tunnel can be solved, the market competitiveness is high, and large-scale popularization is facilitated.

Description

technical field [0001] The invention relates to a tunnel reinforcement method, in particular to a circumferential intelligent reinforcement structure and a reinforcement method of a shield tunnel. Background technique [0002] In recent years, with the rapid development of the economy, various regions of the country have begun a period of large-scale construction of urban subways. Because the construction process has little impact on the surrounding environment, shield tunneling has almost become a must for the construction of subways. The shield tunnel structure is a typical assembled structure. High-strength bolts are used to connect the concrete prefabricated blocks vertically and horizontally to form a load-bearing structure. However, the underground conditions are complex, and changes in the groundwater level have a great influence on the external load of the structure. Under these influences, the shield tunnel structure will deform, such as the convergence of the tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/04E21F17/18
CPCE21D11/08E21F17/18
Inventor 吴刚陶津李金涛杨广武沈忱王佳妮唐永圣
Owner SOUTHEAST UNIV
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