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 suita

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

Experimental program
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Example Embodiment

[0026]In the direction shown in the drawings, lower, left, and right.

[0027]Such asfigure 1 The subway station wall column 2 is in place in contact with the shield tube 1 as a node seam. Several block shield tubes 1 are assembled into an open loop tunnel lining structure.

[0028]Such asfigure 2 The node structure includes a balloon cast iron member 3, a tooth shear member 4, and a non-adanement segment pre-stress steel bar 5. The ball ink cast iron member 3 is cast from the ball ink cast iron, and the balloon cast iron member 3 is provided with a longitudinal reinforcing sleeve 9 in accordance with the node reinforcement, and the longitudinal reinforcing sleeve 9 is cast together with the ductile iron member 3. The non-bonded segment prestressed reinforced bib 5 is a prestressed steel bar without the adhesive force of the Subway Station wall column 2 structural concrete within a distance from the node seam. The longitudinally retracted reinforced reinforced side of the shield tube 1 an...

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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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