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Steel bar surface type connecting joint adopting nodular cast iron member

A ductile iron and connecting node technology, applied in building components, structural elements, building reinforcements, etc., can solve problems such as insufficient connection strength and energy dissipation performance, bending moment, shear force, and seismic performance to be further improved.

Active Publication Date: 2021-05-18
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In general, the structural form and stress mode of the existing joints, the connection strength and energy dissipation performance are not suitable for complex underground engineering construction conditions, and the bending moment, shear force and seismic performance need to be further improved

Method used

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  • Steel bar surface type connecting joint adopting nodular cast iron member
  • Steel bar surface type connecting joint adopting nodular cast iron member
  • Steel bar surface type connecting joint adopting nodular cast iron member

Examples

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Embodiment Construction

[0026] The directions shown in the accompanying drawings are up, down, left, and right.

[0027] Such as figure 1 , the place where the wall column 2 of the subway station contacts the shield segment 1 is a node joint. A number of shield segments 1 are assembled into an open annular tunnel lining structure.

[0028] Such as figure 2 , the node structure includes ductile iron members 3, alveolar shear members 4 and prestressed steel bars 5 without bonding sections. The nodular cast iron component 3 is cast from nodular cast iron, and the nodular cast iron component 3 is provided with a longitudinal reinforcement connecting sleeve 9 according to the node reinforcement requirements, and the longitudinal reinforcement connecting sleeve 9 and the nodular cast iron component 3 are cast together. The prestressed steel bar 5 in the non-adhesive section is a prestressed steel bar that has no bonding force with the structural concrete of the wall column 2 of the subway station withi...

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Abstract

The invention discloses a steel bar surface type connecting joint adopting a nodular cast iron member. The steel bar surface type connecting joint comprises a shield segment and a subway station wall column, the shield segment and the subway station wall column are connected through the nodular cast iron member, a tooth groove shear-resistant member and a non-bonding section prestressed steel bar, and the nodular cast iron member comprises a belly part, an upper wing and a lower wing. The belly part is connected with the tooth groove shear-resistant member, a longitudinal tensile steel bar is arranged in the shield segment, the non-bonding section prestressed steel bar is arranged in the subway station wall column, and the longitudinal tensile steel bar and the non-bonding section prestressed steel bar are connected through a longitudinal steel bar connecting sleeve. The steel bar surface type connecting joint has high connection strength and energy dissipation performance, is suitable for complex underground engineering construction, can bear large bending moment and shearing force at the same time, and is good in anti-seismic performance; and the duct piece section embedded nodular cast iron member is adopted, so that an embedded member is coordinated with concrete deformation, concentrated stress of longitudinal connecting steel bars is avoided, the integrity of the longitudinal connecting steel bars is enhanced, and a surface type connecting mode of the steel bars is formed.

Description

technical field [0001] The invention relates to an underground structure engineering, in particular to a reinforced surface connection node using nodular cast iron components. Background technique [0002] Adopting the construction method of excavating stations on the basis of shield tunnels in subway intervals is an effective means to solve the problem of excessive non-propelling operations in shield tunnel construction. However, this construction method is difficult to construct, and the station structure is subject to complex forces, especially the connection nodes between the main structure of the cast-in-place station and the prefabricated split-ring shield segments, which are the weakest parts of force and earthquake resistance. The bottleneck problem in the actual construction of the station expansion and excavation technology on the tunnel foundation. [0003] The main reason is that the removal of some shield segments changed the uniform force bearing mode of the o...

Claims

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Application Information

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IPC IPC(8): E04C5/16
CPCE04C5/165
Inventor 刘义肖兴王炳辉周爱兆梅岭王丽艳张雷
Owner JIANGSU UNIV OF SCI & TECH
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