CN212826059U

CN212826059U - Limiting connection pore-forming structure for corrugated blind hole of assembled vertical structure

Info

Publication number: CN212826059U
Application number: CN202021594231.7U
Authority: CN
Inventors: 姬松峰; 陈建峰; 郭雄; 谢永东; 张晓闯; 杨小明
Original assignee: Longyuan Construction Group Co ltd
Current assignee: Longyuan Construction Group Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-30
Anticipated expiration: 2030-08-04

Abstract

The utility model relates to a spacing connection pore-forming structure of assembled vertical structure ripple blind hole, which comprises a wall body, set up the ripple blind hole in the wall body, and ripple blind hole shaping forms the inner wall corrugate, thereby rub the joint strength after the area improvement grout through effective increase. And the steel corrugated blind hole die and the grout outlet die are arranged in the corrugated blind holes. The steel corrugated blind hole die and the grout outlet die are respectively communicated with a grouting hole and a grout outlet in the wall body. The utility model discloses it is with low costs: the grouting sleeve is replaced, and the number of connectors is reduced; convenient construction, be convenient for install, improve the work efficiency: the aperture of the corrugated blind hole is large, and the corrugated blind hole is easy to align in place during installation; because the blind hole is big, use the dowel slightly thicker than traditional muffjoint's dowel, reduced connector quantity, reduced the error accumulation, during the installation than traditional muffjoint labour saving and time saving less.

Description

Limiting connection pore-forming structure for corrugated blind hole of assembled vertical structure

Technical Field

The utility model relates to an assembled vertical structure ripple blind hole, especially a spacing connection pore-forming structure of ripple blind hole.

Background

According to the requirements of JG225-2007 metal corrugated pipes for prestress and GB/T51231-2016 technical Standard for fabricated concrete construction, the corrugated blind hole connection is used as a steel bar grout anchor lap joint mode and is allowed to be applied to fabricated building engineering.

1. The method is characterized in that a hole channel is reserved in a precast concrete member in the overlap joint connection (rebappling in grout-filled hole), reinforcing steel bars to be overlapped are inserted into the hole channel, and cement-based grouting material is poured to realize the reinforcing steel bar overlap joint connection mode. The galvanized metal corrugated pipe for the lap joint of the steel bar slurry anchor is in accordance with the relevant regulations of the existing industry standard 'metal corrugated pipe for prestressed concrete' JG 225. The thickness of the steel strip of the galvanized metal corrugated pipe is not less than 0.3mm, and the height of the corrugation is not less than 2.5 mm. In the fabricated concrete structure, the longitudinal steel bar connection at the joints and seams is realized by adopting connection modes such as sleeve grouting connection, mechanical connection, slurry anchor lap joint connection, welding connection, binding lap joint connection and the like according to the requirements of joint stress, construction process and the like. The steel bars with the diameter larger than 20mm are not suitable for adopting the slurry anchor lap joint connection, and the longitudinal steel bars of the components directly bearing the dynamic load are not suitable for adopting the slurry anchor lap joint connection. When the sleeve grouting connection is adopted, the requirements of the existing industry standard' technical specification for grouting connection and application of steel sleeve > JGJ 355 are met; when mechanical connection is adopted, the requirements of the existing industry standard 'technical code for connecting reinforcing steel bar mechanical maple' JGJ107 are met; when welding connection is adopted, the requirements of the existing industry standard JGJ 18 of Rebar welding and acceptance rules are met.

2. The connection mode is as follows: when the vertical steel bars of the prefabricated shear wall adopt the slurry anchor lap joint connection, the following regulations are met:

(1) the length of the straight line segment of the reserved grouting hole at the bottom of the wall body is 30mm greater than the length of the connecting steel bar of the lower prefabricated shear wall extending into the hole, and the upper part of the hole is provided with a reasonable radian according to the grouting requirement. The diameter of the pore canal is not smaller than 40mm and the larger value of 2.5d (d is the diameter of the connecting steel bar extending into the pore canal), and the horizontal clear distance between pore canals is not smaller than 50 mm; the clear distance from the outer wall of the pore channel to the outer surface of the shear wall is not less than 30 mm. When the pre-buried metal corrugated pipe is adopted for hole forming, the thickness of a steel belt of the metal corrugated pipe and the corrugation height meet the specification of the 5.2.2 th standard; when other pore-forming modes are adopted, the mechanical property and the applicability of the connecting joint formed by different reserved pore-forming processes, pore channel shapes, the roughness of the inner wall of the pore channel, pattern depths, intervals and the like are tested and verified.

(2) The horizontally distributed reinforcing steel bars within the vertical reinforcing steel bar connection length range are required to be encrypted, and the encryption range is from the bottom of the shear wall to the top of the reserved grouting pore channel (figure 1) and is not less than 300 mm. The maximum spacing and the minimum diameter of the horizontally distributed reinforcing steel bars in the encryption area are in accordance with the specification of the standard table 5.7.4, and the distance from the horizontally distributed reinforcing steel bars at the lowest layer to the bottom of the wall body is not more than 50 mm. When effective transverse constraint measures are not taken within the connecting length range of the vertically distributed reinforcing steel bars of the shear wall, the lacing wires within the encryption range of the horizontally distributed reinforcing steel bars are encrypted; the vertical distance between the lacing wires is not more than 300mm and not less than 2 rows; the distance between the tie bars along the horizontal direction is not more than that between the vertically distributed steel bars, and the diameter is not less than 6 mm; the tie bars should abut against the connected reinforcing bars and hook the outermost distributed reinforcing bars.

Based on the technical requirements, an assembled vertical structure corrugated blind hole limiting connection pore-forming structure needs to be designed.

Disclosure of Invention

The utility model provides a spacing pore-forming structure of connecting of assembled vertical structure ripple blind hole, this spacing pore-forming structure of connecting of ripple blind hole can regard as a novel assembled vertical structural connection mode.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a spacing pore-forming structure of connecting of assembled vertical structure ripple blind hole, includes the wall body, set up the ripple blind hole in the wall body, and ripple blind hole shaping forms the inner wall corrugate, thereby through effectively increasing the joint strength after rubbing the resistance area and improving the grout.

Furthermore, a steel corrugated blind hole die and a slurry outlet die are arranged in the corrugated blind hole.

Furthermore, the steel corrugated blind hole die and the grout outlet die are respectively communicated with a grouting hole and a grout outlet in the wall body.

Further, the diameter of the corrugated blind hole is 40mm, and the length L is 250 mm.

The utility model has the advantages that:

(1) good economical efficiency and low cost: the grouting sleeve is replaced, and the number of the connectors is reduced.

(2) Convenient construction, be convenient for install, improve the work efficiency: the aperture of the corrugated blind hole is large, and the corrugated blind hole is easy to align in place during installation; because the blind hole is big, use the dowel slightly thicker than traditional muffjoint's dowel, reduced connector quantity, reduced the error accumulation, during the installation than traditional muffjoint labour saving and time saving less.

(3) The low-carbon environment-friendly construction method meets the green construction requirements advocated by the nation: the steel consumption is reduced by replacing the traditional steel sleeve, the cement consumption of procedures such as grouting is reduced by reducing the number of connectors, and the steel and cement industry belongs to the traditional heavy pollution industry.

Drawings

FIG. 1 is a schematic view of a reinforcing steel bar encryption structure horizontally distributed at a lap joint part of a reinforced concrete anchor;

wherein: 1-reserving grouting pore channels; 2 a horizontally distributed reinforcing steel bar encryption area (shaded area); 3, a vertical steel bar; 4-horizontally distributing steel bars;

FIG. 2 is a schematic diagram of the assembled vertical corrugated blind hole spacing connection pore-forming structure of the present invention;

FIG. 3 is a schematic view of a corrugated blind via structure;

fig. 4 is a schematic view of the connection of vertical steel bars in a corrugated blind hole structure.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 2 to 4, the assembled vertical structure corrugated blind hole limiting and connecting pore-forming structure comprises a wall body 8. Set up ripple blind hole 5 in the wall body 8, and the shaping of ripple blind hole forms the inner wall corrugate, thereby improves the joint strength after the grout through effectively increasing the friction area.

A steel corrugated blind hole die and a slurry outlet die are arranged in the corrugated blind hole 5. The steel corrugated blind hole die and the grout outlet die are respectively communicated with a grouting hole 6 and a grout outlet 7 in a wall body 8.

In this embodiment:

(1) corrugated blind hole die and forming

1) The hole forming mode is as follows: pore-forming of pre-buried ripple blind pipe

2) And (4) installing the steel corrugated blind hole die and the grout outlet die in the PC wallboard structure according to the position and the size determined by the construction drawing.

3) And finishing concrete pouring, preventing the mould from shifting, and demoulding in time after the concrete is initially set to take out the mould.

4) The corrugated blind holes are formed to form inner wall corrugations, and the friction area is effectively increased, so that the connection strength after grouting is improved.

5) The process flow comprises the following steps:

installing a steel die → brushing an isolating agent → binding a steel bar → installing an embedded part → paving a heat insulation plate → installing a corrugated blind hole die and fixing → installing a grout inlet die → installing a grout outlet die → pouring concrete and floating → die correction → standing and curing → disassembling a grout inlet and outlet die → disassembling a corrugated blind hole die → shaping and curing of a corrugated blind hole → cleaning a die and brushing a release agent → acceptance.

Claims

1. The utility model provides a spacing pore-forming structure that connects of assembled vertical structure ripple blind hole, includes the wall body, its characterized in that: set up the ripple blind hole in the wall body, and the shaping of ripple blind hole forms the inner wall corrugate, thereby improves the joint strength after the grout through effectively increasing the friction area.

2. The assembled vertical structure corrugated blind hole limiting and connecting pore-forming structure as claimed in claim 1, wherein: and the steel corrugated blind hole die and the grout outlet die are arranged in the corrugated blind holes.

3. The assembled vertical structure corrugated blind hole limiting and connecting pore-forming structure as claimed in claim 2, wherein: the steel corrugated blind hole die and the grout outlet die are respectively communicated with a grouting hole and a grout outlet in the wall body.

4. The assembled vertical structure corrugated blind hole limiting and connecting pore-forming structure as claimed in claim 1, characterized in that: the diameter of the corrugated blind hole is 40mm, and the length L is 250 mm.