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Sleeve pressure type grouting construction method for steel reinforcement connection

A construction method and technology for connecting sleeves, which are applied in the field of sleeve pressure grouting construction for steel bar connection, can solve the problems of reduced connection strength, reduced steel bar connection strength, no disassembly, etc., and achieves convenient use, improved qualification rate, and structural integrity. simple effect

Active Publication Date: 2013-08-28
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the space above the grouting hole in the sleeve cavity is generally not filled with grout, which reduces the connection strength
Moreover, during the grouting process, there will be a certain proportion of holes in the gap formed between the pipe wall and the steel bar, especially in the gap between the ends of the two steel bars, which will reduce the connection strength of the steel bar.
When installing prefabricated building components, there is no instrument and equipment for the non-destructive inspection of the steel sleeve after grouting, and there is no way to disassemble it
Once the air stays in the grout and holes appear, it will lead to safety hazards in the building
At present, there is no construction plan that can ensure that the grouting of the connecting sleeve is completely qualified

Method used

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  • Sleeve pressure type grouting construction method for steel reinforcement connection
  • Sleeve pressure type grouting construction method for steel reinforcement connection
  • Sleeve pressure type grouting construction method for steel reinforcement connection

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Embodiment 1

[0032] See attached figure 1 , a sleeve pressure grouting construction method for steel bar connection described in this embodiment mainly involves the grouting connection and fixation between the prefabricated component 1 and the lower component 3 through the connecting sleeve 2 . The upper surface of the lower component 3 is protruded with assembly steel bars 9 , and the prefabricated component 1 rests on the lower component 3 . The prefabricated component 1 is in the shape of a cuboid, and its four side walls are respectively in contact with the upper surface of the lower component 3 to form an L-shaped corner. A number of prefabricated steel bars 8 and a number of connecting sleeves 2 are pre-embedded in the prefabricated component 1 , the upper opening of the connecting sleeve 2 is inserted with prefabricated steel bars 8 , and the lower end opening is inserted with assembly steel bars 9 . A grouting hole 17 and an overflow hole 18 communicating with the inside of the co...

Embodiment 2

[0047] In the construction method described in this embodiment, the rest of the components and the corresponding construction process are roughly the same, mainly providing formwork sealing structures under different building structures, see Figure 4 , the lower component 3 and the prefabricated component 1 have the same cross-section, so an elastic gasket 4 can be used to seal the two simultaneously. That is, when installing the sealing formwork, the lower half of the elastic gasket 4 is covered on the surface of the lower component 3 near the prefabricated component 1, and its upper half is covered on the surface of the prefabricated component 1 near the lower component 3, and the whole is closed end to end ring. The sealing formwork 5 is integrally fitted with the elastic gasket 4 , and then compressed and sealed by two steel hoops 7 .

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Abstract

The invention relates to the technical field of building construction, in particular to a sleeve pressure type grouting construction method for steel reinforcement connection. The method relates to the connection between a lower element assembled with a steel reinforcement and a precast element in which a plurality of connecting sleeves are pre-buried, wherein an overflow hole and a grouting holebelow the overflow hole are formed on the side wall of each connecting sleeve. The invention is characterized in that the method comprises the following steps: selecting any of the connecting sleeves, connecting the grouting hole of the selected connecting sleeve with a grouting pipe in a sealed way, connecting the overflow hole of the selected connecting sleeve with a pressure gauge in a sealed way, and connecting the grouting hole and the overflow hole of each of the rest connecting sleeves with two one-way valves respectively in a sealed way; connecting the connecting parts of the precast element and the lower element into a whole in a sealed way through a sealing device; pumping slurry into the present connecting sleeve through the grouting pipe; and stopping grouting after the pressure gauge displays that the pressure reaches a threshold value. The method provided by the invention has the advantages that the structure is simple, the use is convenient, and the qualification rate of connecting sleeve grouting is greatly improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a sleeve pressure grouting construction method for steel bar connection. Background technique [0002] In the existing technology of reinforced concrete pouring for buildings, there are mainly the following ways to connect two steel bars into one body: the mutual welding method of steel bars, the compression connection method of casings, and the bending and binding method. The construction of the above several connection methods is relatively complicated, and the steel bar connection must be completed before pouring concrete, which is not suitable for the assembly construction of precast concrete structures. In the construction of prefabricated reinforced concrete structures, a steel connecting sleeve is usually used for connection. The principle of this connection method is roughly as follows: Through the cast hollow steel bar connection sleeve, the steel bar pene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C5/16E04G21/12
Inventor 陈立生葛以衡黄永春赵国强叶可炯孙维君
Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD