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Constraining steel pipe lap joint structure for vertical prefabricated component

A technology of prefabricated components and lap joints, applied in building components, building structures, structural elements, etc., can solve the problems of difficult installation, difficult to ensure construction quality, and inability to fully exert the force transmission performance of lap joints. Small, easy to ensure construction quality, dense filling material effect

Pending Publication Date: 2020-06-09
CABR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of steel bar lap connection method for prefabricated vertical members. By setting restraint steel pipes and pouring or pouring filling materials into the steel pipes, the inner longitudinal bars of the upper and lower prefabricated vertical members can be inside the restraint steel pipes. The reliable lap joint force transmission solves the problems of traditional connection methods such as installation difficulties, construction quality is not easy to guarantee, and lap joint force transmission performance cannot be fully utilized.

Method used

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  • Constraining steel pipe lap joint structure for vertical prefabricated component
  • Constraining steel pipe lap joint structure for vertical prefabricated component
  • Constraining steel pipe lap joint structure for vertical prefabricated component

Examples

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Effect test

Embodiment 1

[0027] see figure 1 , a constrained steel pipe lap connection structure for prefabricated vertical members according to Embodiment 1 of the present invention, used for the connection of longitudinal steel bars in edge members of prefabricated concrete shear walls, including constrained steel pipes located at the inner bottom of the upper prefabricated member 2 1. Steel mesh or steel wire mesh 3 is fixed on the top of the constrained steel pipe 1, structural stirrups 10 are arranged on the outside of the constrained steel pipe 1, the longitudinal reinforcement 4 at the bottom of the upper prefabricated member 2 and the connecting longitudinal reinforcement exposed outside the top surface 5 of the lower floor The ribs 6 are all inserted into the restraining steel pipe 1 and overlapped with each other; the joint 9 is set between the upper prefabricated component 2 and the top surface 5 of the lower floor, and the height of the joint 9 is 20-50 mm; the restraining steel pipe 1 is f...

Embodiment 2

[0035] see image 3 , a constrained steel pipe lap connection structure for prefabricated vertical members according to Embodiment 2 of the present invention, which is used for the connection of longitudinal steel bars in edge members of prefabricated concrete shear walls. The difference from Embodiment 1 is that in this embodiment, ultra-high performance concrete (UHPC, Ultra-High Performance Concrete) is poured into the restrained steel pipe 1 through the grouting hole 15 and the grouting hole 16 reserved at the bottom of the upper prefabricated component 2. ) or high-strength cement-based grouting material 17, replace the mode of pouring concrete in embodiment 1 with this; Constrained steel pipe 1 can also adopt welded combination steel pipe 1c (such as Figure 4 shown); when the restraint steel pipe 1 adopts a rectangular steel pipe 1a or a special-shaped steel pipe 1b, the tie bar 11 in the restraint steel pipe can also be replaced by a partition of the same height as the...

Embodiment 3

[0037] A kind of restrained steel pipe lap connection structure used for prefabricated vertical members in embodiment 3 of the present invention is used for the connection of longitudinal steel bars in prefabricated concrete columns, which is the same as the connection structure in embodiment 1 (such as figure 1 shown), except that: see Figure 5 , the restrained steel pipe of this embodiment (such as Figure 5 As shown in (a) and (b), 1a and 1b are the tie bars 011 set in the rectangular steel pipe and special-shaped steel pipe respectively), and the tie bars 013 in the range of the upper prefabricated column of the constrained steel pipe (such as Figure 5 Shown in (c)) are two-way layout. The distance from the outer edge of the rectangular steel pipe 1a or special-shaped steel pipe 1b to the edge of the prefabricated component is 25-40mm, and the wall thickness of the steel pipe is 1-4mm.

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Abstract

The invention discloses a constraining steel pipe lap joint structure for a vertical prefabricated component. The constraining steel pipe lap joint structure is mainly used for connection of longitudinal rebars of a prefabricated concrete shear wall or a column and other vertical components. The constraining steel pipe lap joint structure is as follows in specific: a constraining steel pipe is arranged at the bottom of an upper-layer prefabricated component; longitudinal ribs in the upper-layer prefabricated component are exposed to the interior of the constraining steel pipe; a lower-layer connecting rebar is inserted in the constraining steel pipe to be in lap joint with the longitudinal ribs in the upper-layer prefabricated component; then, filling material is poured in the constrainingsteel pipe through a preformed vertical through long hole in the upper-layer prefabricated component, or the filling material is filled in the constraining steel pipe through a preformed pulping holeand a slurry discharging hole in the bottom of the upper-layer prefabricated component, and lap joint of the component rebar can be realized when the strength of the filling material reaches the requirement to further meet the force transferring requirement. The constraining steel pipe lap joint structure is reasonable in stress, convenient in production and installation, easy to control in construction quality, and excellent in anti-seismic property and can solve the problems that the traditional connecting structure is difficult in installation and construction and is difficult to ensure the lap joint force transferring performance.

Description

technical field [0001] The present invention relates to the field of prefabricated components, in particular to the connection structure of prefabricated components, in particular to a method of setting restraint steel pipes and pouring or pouring filling material into the steel pipes, so that the inner longitudinal ribs of the upper and lower prefabricated vertical members can be reliably overlapped in the restraint steel pipes. Connection structure for power transmission. Background technique [0002] At present, in my country's prefabricated concrete structure system, the longitudinal reinforcement connection methods of prefabricated vertical components mainly include sleeve grouting connection, grout anchor lap connection, post-cast concrete lap connection, etc. [0003] Among them, the sleeve grouting connection method is mature and reliable, and the connection and component mechanical performance are good. However, since the inner longitudinal reinforcement of each com...

Claims

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Application Information

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IPC IPC(8): E04C5/16
CPCE04C5/16E04C5/165
Inventor 田春雨周剑
Owner CABR TECH CO LTD
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