CN208251467U - A kind of half grout sleeve of reinforcing bar and its connection structure of roll forming - Google Patents

Abstract

A rolling-formed steel half-grouting sleeve and its connection structure. The steel half-grouting sleeve is composed of an assembly end sleeve and a prefabricated end sleeve. The assembly end sleeve is formed by rolling on the outer surface of the cylinder wall. A set of steel pipes with rolling grooves, the wall of the assembled end sleeve is provided with a grouting port and a grout outlet, the prefabricated end sleeve is integrally turned from a steel rod or thick steel pipe, and the inner wall of the prefabricated end sleeve is threaded to form an inner wall. The threaded, prefabricated end sleeve is inserted into the assembled end sleeve and connected as a whole through a welding ring. The connection structure includes a reinforced semi-grouting sleeve, upper prefabricated components and lower prefabricated components. The utility model shortens the absolute length of the original overall processing through split prefabrication. The prefabricated end sleeve is small in size and easy to process. The assembly end sleeve is processed by rolling forming, which has almost no material loss and reduces production costs. The two-part sleeve It can be processed at the same time and has high processing efficiency, which greatly reduces the processing cost of the steel bar semi-grouting sleeve and improves processing efficiency and safety.

Description

A rolling-formed steel half-grouting sleeve and its connection structure

technical field

The utility model relates to a half-grouting sleeve, in particular to a split prefabricated half-grouting sleeve and its connection structure.

Background technique

At present, the semi-grouting reinforcement sleeve connection widely used in the field of prefabricated concrete structures is generally made by integral casting or metal steel bar turning process. For large-scale steel grouting sleeves, the amount of casting sleeve materials is large, and the cost of materials required for casting is much higher than that of machining sleeves, so the cost is very uneconomical. Metal steel rods or thick steel pipes are integrally turned. The sleeve needs to be turned to remove a large amount of metal debris during processing, not only the material loss is particularly large, but also the processing technology is complicated, making the cost high.

Utility model content

The purpose of the utility model is to provide a rolling-formed steel half-grouting sleeve and its connecting structure, to solve the technical problems of high material cost, low processing efficiency and complicated processing technology of the existing half-grouting sleeve, and to improve the The technical problem of low reliability of steel bar connection.

In order to achieve the above object, the utility model adopts the following technical solutions:

A rolling-formed steel bar semi-grouting sleeve, including a cylinder body, the cylinder body is composed of an assembly end sleeve connected with a prefabricated end sleeve,

The assembly end sleeve is a steel pipe with a set of rolling grooves formed by rolling on the outer surface of the cylinder wall. The rolling grooves form an annular groove on the outer surface of the cylinder wall where the rolling grooves are formed. The inner surface of the rolling place forms an annular inward protrusion corresponding to the annular groove. The front end wall of the assembly end sleeve is provided with a grouting port, and the rear end wall of the assembly end sleeve is provided with a grout outlet.

The prefabricated end sleeve is integrally turned from a steel rod or thick steel pipe, and the inner wall of the prefabricated end sleeve is threaded to form an internal thread. The prefabricated end sleeve is a variable-section sleeve, and the front end wall of the prefabricated end sleeve The outer side shrinks inward to become the socket part, and the outer diameter of the barrel wall after the inner shrinkage is adapted to the inner diameter of the assembly end sleeve. same diameter,

The plug-in part and the non-plug-in part are provided with an inclined transition ring surface for variable cross-section transition, the plug-in part is inserted into the rear end of the assembly end sleeve, and a circle passes between the rear end surface of the assembly end sleeve and the transition ring surface The welded ring joins into one piece.

The rolling grooves are evenly spaced or unevenly spaced along the length direction of the fitting end sleeve.

The transition ring surface is an inner concave surface or a plane with an oblique angle of 45 degrees.

The cross-section of the welding ring is annular, and the annular area is not smaller than the maximum cross-sectional area of the prefabricated end sleeve.

The length of the insertion part is not less than half of the total length of the prefabricated end sleeve, and the insertion depth of the insertion part into the rear end of the assembly end sleeve is shorter than the distance between the slurry outlet and the rear end surface of the assembly end sleeve.

A connection structure comprising a roll-formed steel half-grouting sleeve, and also includes an upper prefabricated component and a lower prefabricated component, the lower prefabricated component is pre-embedded with an assembly end steel bar protruding from the top of the lower prefabricated component, and the upper prefabricated component The prefabricated end reinforcements are pre-embedded in the components, and the assembly end reinforcements and the prefabricated end reinforcements are set in one-to-one correspondence.

A grouting joint is reserved between the top side of the lower prefabricated component and the bottom side of the upper prefabricated component, and the grouting joint is filled with joint grout,

The reinforcement half-grouting sleeve is pre-embedded at the bottom of the upper prefabricated component, and is arranged in one-to-one correspondence with the number of prefabricated end reinforcement or assembly end reinforcement, and the grout outlet and the grout injection port are connected to the outer wall of the upper prefabricated component.

The outer surface of the bottom end of the prefabricated end steel bar is threaded with an external thread, and the external thread is compatible with the internal thread of the prefabricated end sleeve, and the bottom end of the prefabricated end steel bar is inserted into the prefabricated end sleeve and its thread connect,

The bottom end surface of the assembly end sleeve is flush with the bottom end surface of the upper prefabricated component, the part of the assembly end steel bar protruding from the upper layer prefabricated component and the joint grouting material is inserted into the assembly end sleeve, and the top surface of the assembly end steel bar extends The entry position does not exceed the height of the grout outlet, and the assembly end sleeve is filled with sleeve grout that flows in through the grouting port and flows out of the grouting port, and both the grouting port and the grouting port are blocked by plugs .

The external thread is formed by direct threading of the ribbed steel bar or threading after thickening.

The upper prefabricated components and the lower prefabricated components are columns or walls of vertical prefabricated components.

The connection structure also includes a horizontal laminated component, the horizontal laminated component includes a prefabricated bottom and a cast-in-place top, the top side of the lower prefabricated component is flush with the bottom side of the prefabricated bottom, and the top of the lower prefabricated component is poured There is concrete poured integrally with the cast-in-place top and flush with the top surface, and a grouting joint is reserved between the top side of the concrete and the upper prefabricated component, and the grouting joint is filled with joint grouting material.

Compared with the prior art, the utility model has the following characteristics and beneficial effects:

The utility model is composed of the split prefabrication of the semi-grouting sleeve which was integrally produced in the past through integral casting or turning processing, and is divided into two parts of the prefabricated end sleeve and the assembly end sleeve for processing. The prefabricated end sleeve is processed by integral turning of the steel bar, and the center of the connecting piece is threaded. The assembly end sleeve is formed by rolling steel pipe to form a plurality of rolling grooves, and one end of the prefabricated end sleeve is retracted and inserted into the assembly end sleeve. At the same time, the two are connected as a whole by welding. The annular area of the welding ring is not less than the maximum cross-sectional area of the assembly end sleeve, and the connection method is safe and reliable.

The utility model shortens the absolute length of the original overall processing through split prefabrication. The size of the prefabricated end sleeve is small and easy to process. The assembly end sleeve is processed by rolling forming, which has almost no material loss and reduces production costs. The two-part sleeve It can be processed at the same time and has high processing efficiency, which greatly reduces the processing cost of the steel half-grouting sleeve, improves processing efficiency and safety, and has practical application value.

In the connection structure of the utility model, the semi-grouting sleeve is integrally prefabricated in the concrete prefabricated component, the prefabricated end sleeve and the prefabricated end steel bar are connected by thread, and the assembly end sleeve is connected to the assembly end steel bar through the sleeve grouting material, and the connection method is safe. Reliable, fully meet the standards of safe use. The connection structure of the utility model can be widely used in multi-high-rise prefabricated assembled concrete frame structures, shear wall structures or prefabricated concrete column reinforcement connections in frame shear wall structures, as well as horizontal reinforcement connections of prefabricated concrete beams and prefabricated concrete shears. Reinforcement connections in force walls and reinforcement connections in existing reinforcement works.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the structural representation of the steel bar semi-grouting sleeve of the present invention.

Fig. 2 is a schematic diagram of the assembly structure of the reinforced half-grouting sleeve.

Fig. 3 is a schematic diagram of an embodiment of the connection structure of the present invention.

FIG. 4 is a schematic diagram of a partially enlarged structure of FIG. 3 .

Reference signs: 1-prefabricated end reinforcement, 2-internal thread, 3-prefabricated end sleeve, 31-socket part, 32-non-socket part, 33-transition ring surface, 4-welding ring, 5-slurry Mouth, 6-rolling groove, 7-grouting port, 8-assembly end reinforcement, 9-sleeve grouting material, 10-lower prefabricated component, 11-assembly end sleeve, 12-upper prefabricated component, 13-cast-in-place Top, 14-joint grouting material, 15-prefabricated bottom, 16-concrete, 17-external thread.

Detailed ways

Embodiment Referring to Fig. 1 , a rolling-formed steel bar semi-grouting sleeve includes a cylinder body, and the cylinder body is composed of an assembled end sleeve and a prefabricated end sleeve connected.

Referring to Figure 2, the assembly end sleeve 11 is a steel pipe with a set of rolling grooves formed by rolling on the outer surface of the cylinder wall through special equipment on the outside of the steel pipe, and the rolling groove 6 is rolled on the cylinder wall The outer surface of the rolling groove forms an annular groove, and the inner surface of the rolling groove forms an annular inward protrusion corresponding to the annular groove. The front end of the sleeve at the assembly end is provided with a grouting port 7. A slurry outlet 5 is opened on the wall of the rear end of the sleeve. The rolling grooves 6 are evenly spaced or unevenly spaced along the length direction of the assembly end sleeve.

Referring to Fig. 2, the prefabricated end sleeve 3 is integrally turned from a steel rod or thick steel pipe, and the inner wall of the prefabricated end sleeve is threaded to form an internal thread 2, and the prefabricated end sleeve is a variable-section sleeve, prefabricated The outside of the tube wall at the front end of the end sleeve shrinks inwardly to form a plug-in part 31, the outer diameter of the tube wall after the shrinkage is adapted to the inner diameter of the assembly end sleeve 11, and the rear end of the prefabricated end sleeve is a non-socket part 32 , and its outer diameter is the same as that of the fitting end sleeve 11 .

Referring to Fig. 1-2, the plug-in part 31 and the non-plug-in part 32 are provided with an oblique transitional ring surface 33 for variable cross-section transition, and the plug-in part 31 is inserted into the rear end of the assembly end sleeve 11 and the end sleeve is assembled at the same time The rear end surface of the cylinder and the transition ring surface 33 are connected as one by a welding ring 4 . The transition ring surface 33 is an inner concave surface or a plane with an inclination angle of 45 degrees. This embodiment is a plane with an oblique angle of 45 degrees. The cross-section of the welding ring 4 is annular, and the annular area is not smaller than the maximum cross-sectional area of the prefabricated end sleeve.

In order to ensure that the steel bar is not pulled out after being stressed, the length a of the insertion part 31 is generally set to be not less than half of the total length of the prefabricated end sleeve 3 . The depth at which the inserting portion 31 is inserted into the rear end of the assembly end sleeve is shorter than the distance between the grout outlet 5 and the rear end surface of the assembly end sleeve to ensure smooth grouting of subsequent grouting materials.

A connection structure of a roll-formed steel half-grouting sleeve, which also includes an upper prefabricated component 12 and a lower prefabricated component 10, the lower prefabricated component 10 is pre-embedded with an assembly end steel bar 8 protruding from the top of the lower prefabricated component 10, The prefabricated end reinforcement bars 1 are pre-embedded in the upper prefabricated member 12, and the assembly end reinforcement bars 8 and the prefabricated end reinforcement bars 1 are provided in one-to-one correspondence.

A grouting joint is reserved between the top side of the lower prefabricated component 10 and the bottom side of the upper prefabricated component 12 , and the grouting joint is filled with joint grout 14 .

The steel bar semi-grouting sleeve is pre-buried at the bottom of the upper prefabricated component 12, and is set in one-to-one correspondence with the number of prefabricated end steel bars 1 or assembly end steel bars 8, and the grout outlet 5 and the grout injection port 7 are connected to the upper prefabricated The outer wall of the member 12.

The outer surface of the bottom end of the prefabricated end steel bar 1 is threaded with external threads 17, and the external threads 17 are formed by direct threading of ordinary ribbed steel bars or threading after pier thickening. The external thread 17 is adapted to the internal thread 2 of the prefabricated end sleeve. The bottom end of the prefabricated end steel bar 1 is inserted into the prefabricated end sleeve 3 and screwed to it.

The bottom end surface of the assembly end sleeve 11 is flush with the bottom end surface of the upper prefabricated component 12 , and the part of the assembly end steel bar 8 protruding from the upper layer prefabricated component 12 and the joint grout 14 is inserted into the assembly end sleeve 11 . The steel bar 8 at the assembly end is a common ribbed steel bar or a rough-cut end pier. An assembly space is reserved between the top end surface of the assembly end reinforcement 8 and the bottom end surface of the prefabricated end sleeve 3, and the insertion position of the top end surface of the assembly end reinforcement 8 does not exceed the height of the slurry outlet 5. The assembly end sleeve is filled with sleeve grouting material 9 flowing in through the grouting port and flowing out from the grouting port, and both the grouting port and the grouting port are blocked by plugs. In this embodiment, the height b of the assembly space is not less than 20 mm, and the height of the assembly space is based on ensuring that the steel bars at the assembly end do not contact the prefabricated end sleeve after being inserted.

In this embodiment, the upper prefabricated components 12 and the lower prefabricated components 10 are columns or walls of vertical prefabricated components. Referring to Figs. 3-4, the connection structure also includes a horizontal stacked component, the horizontal stacked component includes a prefabricated bottom 15 and a cast-in-place top 13, the top side of the lower prefabricated component 10 is connected to the bottom of the prefabricated bottom 15 The sides are flush, and the top of the lower prefabricated component 10 is poured with concrete 16 that is integrally poured with the cast-in-place top 13 and the top surface is flush. A grouting joint is reserved between the top side of the concrete 16 and the upper prefabricated component 12 , the grouting joint is filled with the joint grouting material 14.

When this connection structure is constructed on the project site, the specific construction steps are as follows:

Step 1, installing the lower prefabricated component 10;

Step 2, installing the prefabricated bottom 15;

Step 3, pouring the cast-in-place top 13;

Step 4, pouring joint grouting material 14;

Step 5, install the upper prefabricated component 12, insert the steel bar 8 at the assembly end into the half-grouting sleeve of the steel bar, insert it to the required depth and fix it;

Step 6, use special grouting equipment, pour the sleeve grouting material 9 into the sleeve through the grouting port 7 until the grouting port 5 is discharged, and immediately use the plug to block the grouting port 5 and the grouting port 7;

Step 7: After the sleeve grouting material reaches the design strength, the construction is completed.

Claims (9)

1. a kind of half grout sleeve of reinforcing bar of roll forming, including cylinder, it is characterised in that: the cylinder by assembly side sleeve and Prefabricated end sleeve connection composition,

The assembly side sleeve (11) is that the steel pipe with one group of rolling groove, rolling are formed by rolling in the outer surface of its barrel Outer surface of the slot (6) at barrel rolling forms annular groove, and inner surface of the rolling groove at barrel rolling forms recessed with annular Annular convex, the front end barrel of assembly side sleeve are provided with grouting port (7) slot accordingly, and the rear end barrel of assembly side sleeve is opened There are grout outlet (5),

The prefabricated end cap cylinder (3) is formed by rod iron or thick steel pipe entirety turning, and the inner wall mantle fiber of prefabricated end cap cylinder forms interior spiral shell Line (2), the prefabricated end cap cylinder are variable cross-section sleeve, are inside contracted on the outside of the front end barrel of prefabricated end cap cylinder as plug division (31), the internal diameter of barrel outer diameter and assembly side sleeve (11) after inside contracting is adapted, and the rear end of prefabricated end cap cylinder is non-grafting Portion (32), outer diameter is identical as the outer diameter of assembly side sleeve (11),

Oblique transition anchor ring (33) is set between the plug division (31) and non-plug division (32) and carries out variable cross-section transition, plug division (31) rear end of plugging in fitting end cap cylinder (11) passes through one simultaneously between the rear end face and transition anchor ring (33) of assembly side sleeve Lap welding adapter ring (4) is connected as one.

2. half grout sleeve of reinforcing bar of roll forming according to claim 1, it is characterised in that: rolling groove (6) edge The length direction of assembly side sleeve is evenly spaced on or unevenly spaced distribution.

3. half grout sleeve of reinforcing bar of roll forming according to claim 1, it is characterised in that: the transition anchor ring (33) The plane for being 45 degree for inner concave or oblique angle.

4. half grout sleeve of reinforcing bar of roll forming according to claim 1 or 3, it is characterised in that: the welding circle Cross section is annular, which is not less than the maximum cross section area of prefabricated end cap cylinder.

5. half grout sleeve of reinforcing bar of roll forming according to claim 1, it is characterised in that: the plug division (31) Length is not less than the half of prefabricated end cap cylinder (3) total length, the depth in plug division (31) plugging in fitting end cap tube rear end portion Shorter than length of the grout outlet (5) apart from assembly side sleeve rear end face.

6. a kind of connection structure of half grout sleeve of reinforcing bar including roll forming described in claim 1-5 any one, also Including upper layer prefabricated components (12) and lower layer's prefabricated components (10), it is pre- that stretching lower layer is embedded in lower layer's prefabricated components (10) Assembly end bar (8) at the top of component (10) processed, the upper layer prefabricated components (12) are interior to be embedded with prefabricated end bar (1), is assembled End bar (8) is arranged in a one-to-one correspondence with prefabricated end bar (1), it is characterised in that:

It is reserved with grouted joint between the top side face of lower layer's prefabricated components (10) and the bottom side of upper layer prefabricated components (12), The grouted joint fills joint grouting material (14),

Half grout sleeve of reinforcing bar is embedded in bottom and prefabricated end bar (1) or the assembly side steel of upper layer prefabricated components (12) The number of muscle (8) is arranged in a one-to-one correspondence, and the grout outlet (5) is connected to the outer wall of upper layer prefabricated components (12) with grouting port (7),

The outer surface mantle fiber of the bottom end of the prefabricated end bar (1) has external screw thread (17), the external screw thread (17) with it is prefabricated The internal screw thread (2) of end cap cylinder is adapted, and the bottom end of the prefabricated end bar (1) is inserted into prefabricated end cap cylinder (3) and its screw thread Connection,

The bottom face of the assembly side sleeve (11) is concordant with the bottom face of upper layer prefabricated components (12), the assembly end bar (8) it stretches out in the partial insertion assembly side sleeve (11) of upper layer prefabricated components (12) and joint grouting material (14), assembly side steel The top end face of muscle (8) protrudes into the height that position is no more than grout outlet (5), is filled in the assembly side sleeve through grouting port stream Enter, the sleeve grouting material (9) of grout outlet outflow, the grouting port and grout outlet are blocked by plug.

7. the connection structure of half grout sleeve of reinforcing bar of roll forming according to claim 6, it is characterised in that: described outer Mantle fiber is processed to be formed after screw thread (17) is the direct mantle fiber of Ribbed Bar or is upset.

8. the connection structure of half grout sleeve of reinforcing bar of roll forming according to claim 6, it is characterised in that: on described Layer prefabricated component (12) and lower layer's prefabricated components (10) are the cylinder or wall of vertical prefabricated components.

9. the connection structure of half grout sleeve of reinforcing bar of roll forming according to claim 8, it is characterised in that: the company Binding structure further includes horizontal superposed member, and the horizontal superposed member includes prefabricated bottom (15) and cast-in-place top (13), described The top side face of lower layer's prefabricated components (10) is concordant with the bottom side of prefabricated bottom (15), the top of lower layer's prefabricated components (10) Pour the concrete (16) with cast-in-place top (13) formed by integrally casting, either flush, the top side face of the concrete (16) with it is upper It is reserved with grouted joint between layer prefabricated component (12), the grouted joint fills joint grouting material (14).