CN109930750A - Reinforced bar sleeve slip casting attachment device and its application - Google Patents

Abstract

The invention discloses a kind of reinforced bar sleeve slip casting attachment devices, including a kind of reinforced bar sleeve slip casting attachment device, it include: sleeve body and 2 reinforcing bars, sleeve body is the tube body of a both ends open, one end of 2 reinforcing bars is located at outside sleeve body, and the other end is located at the internal or external of sleeve body, wherein, when the other end is located at the inside of sleeve body, 2 reinforcing bars stretch in sleeve body from two openings respectively；When the other end is located at the outside of sleeve body, root reinforcing bar is open from two respectively and stretches in sleeve body and extend out to outside the sleeve body again；Grouting material is filled between the inner wall of sleeve body and 2 reinforcing bars.This reinforced bar sleeve slip casting attachment device structure is simple, easy to process, just need to only be connected together two reinforcing bars to grouting material condensation hardening by being inserted into pre-buried good sleeve body and pouring grouting material for reinforcing bar, simple to operate.

Description

Grouting connection device for steel bar sleeve and its application

technical field

The invention belongs to the technical field of building concrete component manufacturing, and in particular relates to a grouting connection device for a steel bar sleeve and an application thereof.

Background technique

The commonly used longitudinal reinforcement connection methods in cast-in-place concrete structures include binding butt joint, welding connection and mechanical connection, etc. Due to the small connection parts of prefabricated concrete structures, these traditional reinforcement connection methods are not convenient for construction.

The sleeve grouting connection method is a new type of steel bar connection method suitable for residential industrial production. This method is to first connect the steel bar and the special sleeve by welding, prefabricate the steel bar with the sleeve into the shear wall, and prefabricate the sleeve. Leave it at the upper end of the shear wall. When the two shear walls are installed in place, insert the reserved steel bars on the top into the sleeves in the wall below, and pour the high-strength micro-expansion grouting material. After the grouting material solidifies and hardens, the upper and lower two The root bars are connected as a whole. The inner wall of the conventional sleeve is provided with a plurality of raised annular ribs.

The above-mentioned prior art has the following disadvantages:

1. It is necessary to process a raised ring rib on the inner wall of the sleeve, the processing technology is complicated, and the cost is high;

2. The protruding annular rib in the sleeve easily affects the flow of the grouting material, which is not conducive to filling the entire sleeve, thereby reducing the connection strength.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a grouting connection device for steel bar sleeves with a simple structure and low cost.

Another object of the present invention is to provide an application of the above-mentioned steel bar sleeve grouting connection device in reducing the maximum slippage of steel bars.

Another object of the present invention is to provide an application of the above-mentioned grouting connection device for steel bar sleeves in reducing deformation capacity.

Another object of the present invention is to provide an application of the above-mentioned grouting connection device for steel bar sleeves in improving tensile strength.

The present invention is achieved through the following technical solutions:

A grouting connection device for a steel bar sleeve, comprising: a sleeve body and two steel bars,

The sleeve body is a pipe body with two ends open, one end of the two steel bars is located outside the sleeve body, and the other end is located inside or outside the sleeve body, wherein,

When the other end is located inside the sleeve body, the two steel bars extend into the sleeve body from the two openings respectively; when the other end is located outside the sleeve body When the steel bar is inserted into the sleeve body from the two openings respectively, and then extends out of the sleeve body;

Grouting material is filled between the inner wall of the sleeve body and the two steel bars.

In the above technical solution, when the other end of the steel bar is located outside the sleeve body, two first annular steel bars are fixed on the inner wall of the sleeve body, and the annular shape of the first annular steel bar is The outer diameter is the same as the inner diameter of the sleeve body.

In the above technical solution, the two first annular reinforcing bars are far away from each other and are respectively close to the opening of the sleeve body.

In the above technical solution, when the other end of the reinforcing bar is located inside the sleeve body, the two reinforcing bars are the first reinforcing bar and the second reinforcing bar located on the same straight line. A ring-shaped spacer is welded between the inner walls of the sleeve body to fix the position of the first steel bar in the sleeve body; the end of the second steel bar is in contact with the first steel bar.

In the above technical solution, a second annular reinforcing bar is fixed on the inner wall of the sleeve body away from the spacer, and the annular outer diameter of the second annular reinforcing bar is the same as the inner diameter of the sleeve body.

In the above technical solution, an anchor plate is welded to the end of the second reinforcing bar located in the sleeve body.

In the above technical solution, threads are formed on the inner surface of the sleeve body.

An application of a grouting connection device for a steel bar sleeve in reducing the maximum slip of the steel bar. When the diameter of the steel bar is 10-12 mm, the length of the sleeve body is 105 mm, the outer diameter is 50 mm and the wall thickness is 100 mm. When the thickness is 5mm, the maximum slippage of the grouting connection device of the steel bar sleeve is 0.012mm.

An application of a grouting connection device for a steel bar sleeve in reducing residual deformation. When the diameter of the steel bar is 10-14 mm, the length of the sleeve body is 110-130 mm, the outer diameter is 45-50 mm, and the wall thickness is 110-130 mm. When the thickness is 5-5.5 mm, the average residual deformation of the grouting connection device for the steel bar sleeve is 0.007 mm.

The application of a grouting connection device for a steel bar sleeve in improving tensile strength. When the diameter of the steel bar is 10-14mm, the length of the sleeve body is 110-130mm, the outer diameter is 45-50mm, and the wall thickness is 110-130mm. When the thickness is 5 to 5.5 mm, the tensile strength of the grouting connection device for the steel bar sleeve is 667 MPa.

The advantages and beneficial effects of the present invention are:

1. The steel bar sleeve grouting connection device has a simple structure and is convenient to process;

2. Simply insert the steel bar into the pre-embedded sleeve body, pour the grouting material, and connect the two steel bars together after the grouting material solidifies and hardens, which is simple and convenient, and saves a lot of power resources required for steel welding The technical requirements for workers are not high, and there will be no open fire, and the construction is safe;

3. It can avoid reserving holes in the prefabricated wall panels, making the construction easier and faster and reducing the construction cost.

To sum up, the device has simple structure and low cost, and is suitable for residential industrial production.

Description of drawings

1 is a cross-sectional view of Embodiments 1 and 2 of the grouting connection device for steel bar sleeves of the present invention;

Fig. 2 is the sectional view of embodiment 3-5 of the grouting connection device of the steel bar sleeve of the present invention;

Fig. 3 is the loading scheme diagram of the force control stage;

Fig. 4 is the cross-sectional view of the embodiment 6-10 of the grouting connecting device of the steel bar sleeve of the present invention;

5 is a cross-sectional view of Embodiments 11 and 12 of the grouting connection device for steel bar sleeves of the present invention;

in:

1: steel bar, 101: second steel bar, 102: first steel bar, 2: grouting material, 3: sleeve body, 401: first annular steel bar; 402: second annular steel bar; 6: spacer.

For those of ordinary skill in the art, other related drawings can be obtained from the above drawings without any creative effort.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

In the technical solution of the present invention, the steel bars are all straight bar steel bars.

In the following embodiments, the sleeve body is a seamless steel pipe; the model of the cement mortar mixer is JJ-5; the model of the hydraulic servo actuator is MTS243.43; the brand of the data acquisition instrument is strainbook. The grouting material is 100MPa high-strength grouting material produced by Tangshan Polar Bear Building Materials.

Lap Length:

Referring to the provisions of Articles 8.3.1 and 8.4.4 of "Code for Design of Concrete Structures" GB50010-2010, calculate the anchorage length of the output steel bar _la = ζ _{a ab} , where l _ab is the basic anchorage length of the tensile steel bar (check the table Selected), ζa is the anchorage length correction coefficient, selected according to the specification (GB50010-2010). On the basis of the anchorage length la of the reinforcement bar, the lap length l _l = ζ _{l la a is} obtained, where ζ _l is generally a correction factor for the lap length of the reinforcement bar greater than 1, which is selected according to Table a. The lap length of the sleeve grouting lap joint specimen is based on the anchoring length _la multiplied by the rebar lap length correction coefficient ζ _l . Considering the large spacing of the reinforcement bars in the concrete wall, ζ _l = 1.2 is selected for calculation. Considering the favorable effect of the hooping effect of the sleeve on the lap joint, the lap length is reduced by about 25% and 45% in Examples 1 and 2, respectively, and the lap length is 0.75l _l and 0.55l _l , respectively.

Table a Longitudinal tension steel bar lap length correction factor

Percentage of longitudinal lapped steel joint area (%) ≤25 50 100 ζ_l 1.2 1.4 1.6

Note: The area of longitudinal lap joint reinforcement refers to the proportion of joint reinforcement in the total reinforcement in the same connection section

Example 1

As shown in FIG. 1, a grouting connection device for a steel bar sleeve includes a sleeve body 3 and two steel bars 1. The sleeve body 3 is a pipe body with openings at both ends, and one end of the two steel bars is located in the sleeve body 3. In addition, the other end respectively extends into the sleeve body 3 from the two openings and then extends 20mm outside the sleeve body 3; the inner wall of the sleeve body 3 and the two steel bars are filled with grouting material 2 . Among them, the steel bar of HRB335 is selected, and the specific parameters are shown in Table 1.

Example 2

Example 2 and Example 1 have the same structure of the grouting connecting device for the steel bar sleeve, and the specific parameters are different, see Table 1 for details.

Table 1 Dimensions of the reinforcement sleeve grouting connection device in Examples 1-2

The using method of the reinforcing bar sleeve grouting connection device of embodiment 1-2:

1) Insert a steel bar 1 at both ends of the sleeve body 3 and extend from the other opposite end to the outside of the sleeve body 3 and pre-fix so that the two steel bars 1 are parallel to each other and the spacing is 5mm;

2) Stir the grouting material 2 with a cement mortar mixer, and the grouting material 2 is a micro-expansion grouting material with a strength higher than C60. Fill the stirred grouting material 2 into the sleeve body 3, and after the grouting material 2 is initially set, put the steel sleeve grouting connection device into the curing room, and maintain it under standard conditions for 28 days.

Example 3

In order to improve the strength of the steel bar sleeve grouting connection device, on the basis of Embodiment 1-2, as shown in FIG. The reinforcing bars 401 are far away from each other and are respectively close to the opening of the sleeve body 3 . The annular outer diameter of the first annular reinforcing bar 401 is the same as the inner diameter of the sleeve body 3 .

Among them, the steel bar 1 is HRB335 steel bar, and the specific parameters are shown in Table 2.

Example 4

The structure of the grouting connecting device of the steel bar sleeve of Example 4 and Example 3 is the same, and the specific parameters are different, see Table 2 for details.

Example 5

The structure of the grouting connecting device of the steel bar sleeve in Example 5 and Example 3 is the same, and the specific parameters are different, see Table 2 for details.

Table 2 Dimensions of reinforcement sleeve grouting connection device in Examples 3-5

The using method of the reinforcing bar sleeve grouting connection device of embodiment 3-5:

A first annular steel bar 401 is welded to the inner surfaces near the openings at both ends of the sleeve body 3, and then the use method is performed according to the embodiment 1-2.

The performance test method of the grouting connection device of the steel bar sleeve of embodiment 1-5:

Repeated tensile test was carried out on the grouting connection device of the steel bar sleeve through the hydraulic servo actuator, and the steel bar was firmly clamped by the steel bar clamp. During the test, the hydraulic servo actuator collects the force data of the steel bar, and the slippage between the steel bar and the sleeve is collected by the data acquisition instrument. In addition, the extension instrument is used to measure the slippage of the steel bar, and the extension instrument is digitally collected by the data acquisition instrument, and the same conditions are compensated for the test piece. The test results are shown in Table 3. The test loading plan is: the test loading process is first controlled by force, as shown in Figure 3, the first stage of loading is loaded from zero to _0.2PN , then unloaded to _0.1PN , and then loaded to _0.2PN , a total of three Cycle, a total of 60s; the second stage starts from _0.1PN to _0.5PN , then unloads to _0.1PN , and then loads to _0.5PN , a total of three cycles, a total of 90s; the third stage starts from _0.1PN Loaded to 1.0P _N and then unloaded to 0.1P _N , and then loaded to 1.0P _N , for a total of three cycles for a total of 120s. Among _them , _{P N} is the yield _force of the steel bar calculated according to the standard value of the theoretical yield strength of the steel _bar . After the force control loading stage is completed, the displacement control loading is used, and the grouting connection device of the steel bar to be tested is loaded at a speed of 4 mm/min until the specimen is destroyed.

Table 3 Performance test data of reinforcement sleeve grouting connection device in Examples 1 to 5

Table 4 Test loading classification

Performance evaluation of the steel sleeve grouting connection device of Examples 1-5:

"Technical Regulations for Mechanical Connection of Steel Reinforcing Bars" JGJ107-2010 stipulates that the tensile strength of Grade 1 joints should meet the following requirements: That is, the measured tensile strength of the joint specimen greater than or equal to the standard value of the tensile strength of the steel bar f _stk , where, Measured tensile strength of grouting connections for rebar sleeves.

The standard value f _stk of the tensile strength of the steel bar with a diameter of 10mm is 35.7KN, then 1.10f _stk =39.3kN; from Table 3, it can be seen that the measured tensile strength of each steel bar sleeve grouting connection device in Examples 1-5 All are greater than f _stk , meeting the strength requirements of the "Technical Regulations for Mechanical Connection of Steel Reinforcing Bars" JGJ107-2010 for grade 1 joints, that is, the tensile strength of each steel sleeve grouting connection device meets the requirements and has a certain safety reserve.

The application of steel sleeve grouting connection device in reducing the maximum slip of steel bars:

It can be seen from Table 3 that the maximum slippage of the steel bars in Examples 1 and 2 has obvious advantages compared with those of Examples 3-5, and the maximum slippage is the smallest, which is 0.012 mm.

In the above embodiments, two steel bars 1 are lapped together. Considering that the two wall steel bars need to be arranged staggered, the two overlapped steel bars are not concentrically stressed, and some specimens have strict requirements on steel bars, so the first method is proposed. The connection method of the butt joint between the first steel bar and the second steel bar.

Example 6

A steel bar sleeve grouting connection device, as shown in Figure 4, includes a sleeve body 3 and two steel bars, the sleeve body 3 is a pipe body with openings at both ends, and the two steel bars extend from the two openings to the In the sleeve body 3, the two steel bars are the first steel bar 102 and the second steel bar 101 located on the same straight line, and a ring body (circular ring body) is welded between the first steel bar 102 and the inner wall of the sleeve body 3. ) of the spacer 6, the height of the axial direction is 25mm, (20mm is welded inside the sleeve body, 5mm is out of the sleeve body) The outer diameter of the spacer 6 is the same as the inner diameter of the sleeve body, and the inner diameter is the same as the diameter of the first steel bar 102 Suitably, the end of the first steel bar 102 is welded into the inner hole of the spacer 6 to fix the position of the first steel bar 102 in the sleeve body 3; the second steel bar 101 is inserted into the sleeve 3 until it is connected with the first steel bar 102 Rebar 102 contacts. A second annular steel bar 402 is fixedly mounted on the inner wall away from the spacer 6 and close to the end of the sleeve body 3 . The annular outer diameter of the second annular steel bar 402 is the same as the inner diameter of the sleeve body 3 . A grouting material 2 is filled between the inner wall of the sleeve body 3 and the two reinforcing bars.

Wherein, the first steel bar 102 and the second steel bar 101 have the same diameter, and both are HRB500 ribbed steel bars. The sleeve body 3 is a seamless steel pipe. The specific parameters are shown in Table 4.

Example 7

The structures of the grouting connecting devices for steel bar sleeves in Example 7 and Example 6 are the same, and the specific parameters are different, see Table 4 for details.

Example 8

The structure of the grouting connecting device of the steel bar sleeve of the embodiment 8 and the embodiment 6 is the same, and the specific parameters are different, see Table 4 for details.

Example 9

The structure of the grouting connecting device of the steel bar sleeve in Example 9 and Example 6 is the same, and the specific parameters are different, see Table 4 for details.

Example 10

The structure of the grouting connecting device for the steel bar sleeve of Example 10 and Example 6 is the same, and the specific parameters are different, see Table 4 for details.

Table 4 Dimensions of the grouting connection device for steel bar sleeves in Examples 6-10

The use method of the grouting connection device of the steel bar sleeve of embodiment 6-10:

1) Weigh an appropriate amount of grouting material 2, add an appropriate amount of water as required and mix it with a cement mortar mixer for a certain period of time;

2) Weld a second annular steel bar 402 on the inner surface of the opening at one end of the sleeve body 3, and weld the spacer block 6 on the inner surface of the opening at the other end;

3) Fix the sleeve body 3 on the self-made base, insert the first steel bar 102 from the end of the sleeve body 3 where the spacer block 6 is installed through the distribution steel bars provided on the upper part of the base, so that the first steel bar 102 is fixed on the sleeve body 3 The axial center position of the sleeve body 3 is parallel to the cylinder wall of the sleeve body 3, and then the first steel bar 102 is welded to the spacer block 6, and the second steel bar 101 extends from the other end of the sleeve body 3 to the end of the first steel bar 102. contact, and the second steel bar 101 and the first steel bar 102 are on the same line;

4) Pour the stirred grouting material 2 into the sleeve body. After the grouting material 2 is initially set, put the steel sleeve grouting connection device into the curing room, and maintain it at the standard strength for 28 days.

Example 11

A steel bar sleeve grouting connection device, as shown in Figure 5, includes a sleeve body 3 and two steel bars, the sleeve body 3 is a pipe body with openings at both ends, and the two steel bars extend from the two openings to the In the sleeve body 3, the two steel bars are the first steel bar 102 and the second steel bar 101 located on the same straight line. A ring-shaped spacer block 6 is welded between the first steel bar 102 and the inner wall of the sleeve body 3. The height of the direction is 25mm, (20mm is welded inside the sleeve body, and 5mm is out of the sleeve body) The outer diameter of the spacer 6 is the same as the inner diameter of the sleeve body, and the inner diameter is suitable for the diameter of the first steel bar 102. The first steel bar 102 The end of the steel bar 101 is welded into the inner hole of the spacer block 6 to fix the position of the first steel bar 102 in the sleeve body 3 ; the second steel bar 101 is inserted into the sleeve 3 until it contacts the first steel bar 102 .

The inner surface of the sleeve body 3 is machined with threads. A grouting material 2 is filled between the inner wall of the sleeve body 3 and the two reinforcing bars.

Wherein, the first steel bar 102 and the second steel bar 101 have the same diameter, and both are HRB500 ribbed steel bars. The sleeve body 3 is a seamless steel pipe. The specific parameters are shown in Table 5.

Table 5 Dimensions of the grouting connection device for steel bar sleeves in Examples 11-12

The method of using the grouting connection device for steel bar sleeves in Example 11:

1) Weigh an appropriate amount of grouting material 2, add an appropriate amount of water as required and mix it with a cement mortar mixer for a certain period of time;

2) Use an M36 tap to clasp the sleeve body 3, and process the inner surface of the sleeve body 3 with threads to increase the connection strength between the inner wall of the sleeve body 3 and the grouting material 2, and prevent the grouting material 2 from coming out together with the steel bars. A spacer 6 is welded on the inner surface of the opening at one end of the sleeve body 3;

3) Fix the sleeve body 3 on the self-made base, insert the first steel bar 102 from one end of the mounting block 6, and fix the first steel bar 102 on the axial position of the sleeve body 3 through the spacer block, so that the first steel bar 102 is The steel bar 102 is parallel to the cylinder wall of the sleeve body 3, the first steel bar 102 is welded with all the spacers 6, and then the second steel bar 101 is extended from the other end of the sleeve body 3 to contact with the end of the first steel bar 102 , and the second reinforcing bar 101 and the first reinforcing bar 102 are on the same line;

4) Pour the stirred grouting material 2 into the sleeve body. After the grouting material 2 is initially set, put the steel sleeve grouting connection device into the curing room, and maintain it at the standard strength for 28 days.

The performance test method of the grouting connection device of the steel bar sleeve in Example 11:

Loading is carried out in accordance with the one-way tensile loading system specified in "Technical Regulations for Mechanical Connection of Steel Bars" JGJ107-2010. The loading system is: 0 → 0.6f _yk → 0 (measure residual deformation) → maximum tensile force (record tensile strength) → 0 ( Determination of maximum force total elongation), where f _yk is the standard value of the yield strength of the steel bar.

Example 12

The structures of the grouting connecting devices for steel bar sleeves in Example 12 and Example 11 are the same, and the specific parameters are different, see Table 6 for details.

Table 6 Dimensions of the grouting connection device for steel bar sleeves in Example 12

The use method of the grouting connecting device for the steel bar sleeve in the embodiment 12 is the same as that in the embodiment 11.

Embodiment 12 The performance test method of the grouting connection device of the steel bar sleeve:

This test adopts a 500kN hydraulic servo actuator and a test device suitable for tensile and compressive tests of steel bars. According to the "Technical Regulations for Mechanical Connection of Steel Bars" JGJ107-2010, the loading system is formulated, and the loading system is 0→(0.9 f _yk →-0.5f _yk )→destruction test, in which the 0.9f _yk →-0.5f _yk part needs to be repeatedly loaded 20 times. where f _yk is the standard value of the yield strength of the steel bar. The calculated test loading indexes of each steel sleeve grouting connection device are shown in Table 7.

Table 7 Test Loading Index

Rebar diameter Standard value of yield strength f_yk/kN 0.9f_yk 0.6f_yk -0.5f_yk 12 45.2 41 27.1 -twenty three

Among them, f _yk is the standard value of the yield strength of the steel bar.

Performance evaluation results of Examples 6-12:

For each steel bar sleeve grouting connection device to be tested, the test results are evaluated in accordance with the design principles and performance grades of the joints specified in the "Technical Regulations for Mechanical Connection of Steel Reinforcements" JGJ107-2010. After the grade joint has undergone uniaxial tension or repeated tension and compression under high stress, the tensile strength of the steel sleeve grouting connection device must meet the requirements in Table 8, and its deformation capacity should meet the requirements in Table 9. See Table 10 for detailed data on the evaluation of the grouting connection device for rebar sleeves.

Table 8 Tensile Strength of Joints

Note: The tensile strength is measured for the grouting connection device of the steel bar sleeve, and f _stk is the standard value of the tensile strength of the steel bar.

Table 9 Deformation capacity of steel sleeve grouting connection device

Among them, u ₀ is the residual deformation within the specified gauge length after the steel sleeve grouting connection device is loaded to 0.6f _yk and unloaded; u ₂₀ is the repeated tension and compression of the steel sleeve grouting connection device according to the high stress repeated tension and compression loading system Residual deformation after 20 times, d is the diameter of the steel bar.

Table 10 Performance data of reinforcement sleeve grouting connection device in Examples 6-12

The application of steel sleeve grouting connection device in reducing deformation capacity:

It can be seen from Table 10 that the average residual deformation of Example 7 has obvious advantages compared with other examples, and the average residual deformation is at least 0.007 mm.

The application of steel sleeve grouting connection device in improving tensile strength:

It can be seen from Table 10 that the tensile strength of Example 10 has obvious advantages compared with other examples, and the maximum tensile strength reaches 667MPa.

For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" are used in the embodiments to describe how one element or feature shown in the figures is relative to another element or feature. relation. It should be understood that, in addition to the orientation shown in the figures, the spatial terminology is intended to encompass different orientations of the rebar sleeve grouting connection in use or operation. For example, if the rebar sleeve grouting connection in the figures is turned over, elements described as "below" other elements or features would then be positioned "above" the other elements or features. Thus, the exemplary term "lower" can encompass both upper and lower positions. The rebar sleeve grouting connection may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein are to be interpreted accordingly.

Moreover, relational terms such as "first" and "second" etc. are only used to distinguish one element from another having the same name and do not necessarily require or imply any such actual existence between those elements relationship or order.

The present invention has been exemplarily described above. It should be noted that, without departing from the core of the present invention, any simple deformation, modification, or other equivalent replacements that can be performed by those skilled in the art without any creative effort fall into the scope of the present invention. The scope of protection of the invention.

Claims (10)

1. a kind of reinforced bar sleeve slip casting attachment device characterized by comprising sleeve body (3) and 2 reinforcing bars, the sleeve Ontology (3) is the tube body of a both ends open, and one end of 2 reinforcing bars is located at the sleeve body (3) outside, and the other end is located at institute State the internal or external of sleeve body (3), wherein

When the other end is located at the inside of the sleeve body (3), 2 reinforcing bars are protruded into from two openings respectively In to the sleeve body (3)；When the other end is located at the outside of the sleeve body (3), 2 reinforcing bars respectively from Two openings stretch in the sleeve body (3) and extend out to the sleeve body (3) again outside；

Grouting material (2) are filled between the inner wall of the sleeve body (3) and 2 reinforcing bars.

2. reinforced bar sleeve slip casting attachment device according to claim 1, which is characterized in that when the other end position of the reinforcing bar When the outside of the sleeve body (3), 2 first annular reinforcing bars are fixed on the inner wall of the sleeve body (3) (401), the outer diameter of the annular of the first annular reinforcing bar (401) is identical as the sleeve body (3) internal diameter.

3. reinforced bar sleeve slip casting attachment device according to claim 2, which is characterized in that 2 first annular reinforcing bars (401) it is located remotely from each other and respectively close to the opening of the sleeve body (3).

4. reinforced bar sleeve slip casting attachment device according to claim 1, which is characterized in that when the other end position of the reinforcing bar When the inside of the sleeve body (3), 2 reinforcing bars are the first reinforcing bar (102) and the second steel being located along the same line Muscle (101) is welded with the cushion block of a torus between first reinforcing bar (102) and the inner wall of the sleeve body (3) (6), for fixing the position of the first reinforcing bar (102) in the sleeve body (3)；The end of second reinforcing bar (101) It is in contact with the first reinforcing bar (102).

5. reinforced bar sleeve slip casting attachment device according to claim 4, which is characterized in that in separate the cushion block (6) Be fixed with one second steel hoop (402) on the inner wall of sleeve body (3), the annular of second steel hoop (402) it is outer Diameter is identical as the internal diameter of the sleeve body (3).

6. reinforced bar sleeve slip casting attachment device according to claim 5, which is characterized in that the second reinforcing bar (101) position An anchor plate is welded in the end in the sleeve body (3).

7. reinforced bar sleeve slip casting attachment device according to claim 4, which is characterized in that the sleeve body (3) it is interior Surface is formed with screw thread.

8. application of the reinforced bar sleeve slip casting attachment device as described in claim 1 in the maximum slippage for reducing reinforcing bar, It is characterized in that, when the diameter of the reinforcing bar is 10~12mm, the length of the sleeve body (3) is 105mm, outer diameter 50mm, When wall thickness is 5mm, the maximum slippage of the reinforced bar sleeve slip casting attachment device is 0.012mm.

9. application of the reinforced bar sleeve slip casting attachment device as claimed in claim 5 in reduction remaining deformation, feature exist In, when the diameter of the reinforcing bar is 10~14mm, the length of the sleeve body (3) is 110~130mm, outer diameter is 45~ 50mm, when wall thickness is 5~5.5mm, the average residual deformation of the reinforced bar sleeve slip casting attachment device is 0.007mm.

10. application of the reinforced bar sleeve slip casting attachment device as claimed in claim 5 in raising tensile strength, feature exist In, when the diameter of the reinforcing bar is 10~14mm, the length of the sleeve body (3) is 110~130mm, outer diameter is 45~ 50mm, when wall thickness is 5~5.5mm, the tensile strength of the reinforced bar sleeve slip casting attachment device is 667MPa.