Steel sleeve full grouting connection structure

Abstract

This application discloses a fully grouted connection structure for rebar sleeves, relating to the field of building construction technology. It includes a grouting sleeve and a sealing plug. The sealing plug is located at the upper end of the grouting sleeve. The lower part of the grouting sleeve has an inlet, and the upper part has an outlet. The lower end face of the sealing plug is lower than the outlet. The grouting sleeve has an outlet channel, one end of which connects to the outlet, and the other end connects to the area inside the grouting sleeve located below the sealing plug. In this application, the outlet is higher than the lower end face of the sealing plug. When grout overflows from the outlet, the grout has already filled the area inside the grouting sleeve located below the sealing plug, ensuring that the inside of the grouting sleeve remains as compacted as possible.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to fully grouted steel sleeve connection structures. Background Technology

[0002] Prefabricated monolithic shear walls employ sleeve grouting connection technology. This technology involves inserting a single ribbed steel bar into a metal sleeve, then injecting cement-based grout. After the grout hardens, it bonds the sleeve and the ribbed steel bar together, achieving force transmission through the bond. Grouting sleeves are divided into fully grouted sleeves and partially grouted sleeves. Fully grouted sleeves connect the steel bars at both ends using grouting.

[0003] In the grouting technology using full grouting sleeves, during construction, the moment the grout is discharged from the outlet at the top of the grouting sleeve, the workers use a plug to block the outlet. However, at the moment the plug blocks the outlet, a small amount of air may be trapped in the space between the outlet and the top of the grouting sleeve, making it difficult to ensure the compactness of the filling inside the grouting sleeve and affecting the connection strength between the grouting sleeve and the reinforcing steel. Summary of the Invention

[0004] In order to reduce the situation where air is trapped at the top of the fully grouted sleeve and affects the filling density at the top of the grouted sleeve, this application provides a fully grouted connection structure for steel sleeves.

[0005] The fully grouted steel sleeve connection structure provided in this application adopts the following technical solution:

[0006] A fully grouted rebar sleeve connection structure includes a grouted sleeve and a sealing plug. The sealing plug is located at the upper end of the grouted sleeve. The lower part of the grouted sleeve has a feed inlet, and the upper part of the grouted sleeve has a discharge outlet. The lower end face of the sealing plug is lower than the discharge outlet. The grouted sleeve has a discharge channel. One end of the discharge channel is connected to the discharge outlet, and the other end of the discharge channel is connected to the area inside the grouted sleeve located below the sealing plug.

[0007] By adopting the above technical solution, during the grouting operation of precast wall panels, when the liquid level of the grout in the grouting sleeve rises to the top of the grouting sleeve, the grout gradually overflows outward through the discharge channel and discharge port. When the workers observe the grout overflowing, they seal the discharge port with a plug. Since the discharge port is higher than the lower end face of the sealing plug, when the grout overflows from the discharge port, the grout has already filled the area inside the grouting sleeve below the sealing plug. In this case, even if the plug seals a small amount of air inside the discharge port, the air is mainly concentrated near the higher discharge port, that is, mainly concentrated in the discharge channel, so that the inside of the grouting sleeve can be kept as compacted as possible. After the grout inside the grouting sleeve solidifies, it serves as a structure connecting the reinforcing steel bars of the precast wall panel. When the grout fills the grouting sleeve, it helps to ensure the structural strength of the solidified grout.

[0008] Optionally, the upper part of the grouting sleeve is provided with a discharge nozzle, the end of the discharge nozzle near the grouting sleeve is lower than the end away from the grouting sleeve, the port of the discharge nozzle away from the grouting sleeve serves as the discharge port, and the inner cavity of the discharge nozzle serves as the discharge channel.

[0009] By adopting the above technical solution, the inner cavity of the discharge nozzle serves as the discharge channel, and the setting of the discharge channel is relatively simple.

[0010] Optionally, a reinforcing rib is provided between the discharge nozzle and the outer peripheral surface of the grouting sleeve.

[0011] By adopting the above technical solution, the reinforcing rib connects the discharge nozzle and the grouting sleeve, making the discharge nozzle less prone to deformation under external force, thereby enhancing the stability of the discharge nozzle position.

[0012] Optionally, the upper part of the grouting sleeve is provided with a discharge nozzle, and the port of the discharge nozzle away from the grouting sleeve serves as the discharge port; the outer peripheral surface of the sealing plug is provided with a connecting groove, the length direction of the connecting groove is along the axial direction of the sealing plug, a gap is left between the upper end of the connecting groove and the upper end face of the sealing plug, and the lower end of the connecting groove penetrates the lower end face of the sealing plug; the inner cavity of the connecting groove communicates with the inner cavity of the discharge nozzle and together serve as the discharge channel.

[0013] By adopting the above technical solution, when the grout in the grouting sleeve reaches the top of the grouting sleeve, it first enters the connecting groove, then enters the discharge nozzle from the connecting groove, and then flows out from the discharge nozzle.

[0014] Optionally, the grouting sleeve includes a sleeve body, the sleeve body includes an inner tube and an outer tube, the inner tube and the outer tube are interference-fitted, the inner tube is provided with a plurality of first through holes, the outer tube is provided with a plurality of second through holes, the first through holes and the second through holes are staggered from each other; the sealing plug is located inside the inner tube.

[0015] By adopting the above technical solution, the first through hole and the inner surface of the outer tube form a concave structure. After the grout solidifies, a protruding structure is formed that is embedded in the first through hole, strengthening the connection between the grouting sleeve and the solidified grout. The second through hole and the outer surface of the inner tube form a concave structure. During the manufacturing of the precast wall panel, after the concrete of the precast wall panel solidifies, a protruding structure is formed that is embedded in the second through hole, further strengthening the connection between the precast sleeve and the concrete of the precast wall panel. The first and second through holes can be formed by machining, which is relatively convenient. By adjusting the size and arrangement of the first and second through holes, the connection strength between the grouting sleeve and the precast wall panel concrete and grout can be adjusted.

[0016] Optionally, the outer tube is a reducing tube, comprising an upper tube section and a lower tube section. The lower tube section is interference-fitted with the inner tube. The second through hole is distributed in the lower tube section. The diameter of the upper tube section is larger than that of the lower tube section. An annular cavity is formed between the upper tube section and the inner tube. The upper end of the inner tube is provided with a flange that closes the annular cavity between the upper tube section and the inner tube. The upper tube section is connected to a discharge nozzle. The end of the discharge nozzle away from the upper tube section serves as a discharge port. The inner cavity of the discharge nozzle communicates with the annular cavity and together serve as the discharge channel. The upper part of the inner tube is provided with a discharge hole that communicates with the annular cavity. The discharge hole is lower than the lower end face of the sealing plug.

[0017] Optionally, the outer circumferential surface of the inner tube is provided with a guide slot, the guide slot is provided along the length direction of the inner tube, and the two ends of the guide slot penetrate the two end faces of the inner tube; a guide piece is fixedly connected to the inner circumferential surface of the upper tube section, and the side edge of the guide piece away from the fixed side is inserted into the guide slot.

[0018] By adopting the above technical solution, the inner tube and outer tube of the grouting sleeve are interference-fitted. When the inner tube and outer tube are inserted together, the guide plate and guide slot can guide the inner tube and outer tube to help ensure that the first through hole and the second through hole maintain a misaligned positional relationship.

[0019] By adopting the above technical solution, after the grout enters the inner tube, as the grout level rises, the grout flows from the inner tube through the discharge hole into the annular chamber, then from the annular chamber into the discharge nozzle, and finally flows out from the discharge nozzle. The upper and lower pipe sections form a stepped structure, which helps to increase the connection strength between the grouting sleeve and the concrete of the precast wall panel.

[0020] Optionally, the discharge hole and the outlet are located on both sides of the center line of the grouting sleeve.

[0021] By adopting the above technical solution, the discharge hole and the outlet are located on both sides of the center line of the grouting sleeve. When the grout enters the annular cavity from the inner tube, it is not easy for it to directly enter the outlet nozzle, which helps to fill the annular cavity as much as possible.

[0022] Optionally, the wall thickness of the inner tube is greater than that of the outer tube, and the edges of a plurality of the second through holes of the outer tube are welded and fixed to the inner tube.

[0023] By adopting the above technical solution, the edges of several second through holes of the outer tube are welded and fixed to the inner tube, which strengthens the connection between the inner and outer tubes and reduces the relative axial movement between them. When the edges of the second through holes are welded and fixed to the inner tube, the molten material mainly adheres to the inner tube. By giving the inner tube a larger wall thickness, the thermal deformation of the inner tube can be reduced.

[0024] Optionally, both the first through hole and the second through hole are elongated holes, with the minor axis of the first through hole and the major axis of the second through hole both along the axial direction of the grouting sleeve.

[0025] By adopting the above technical solution, the first through hole is set as an elongated hole, and the long axes of both the first and second through holes are along the axial direction of the grouting sleeve, so that the resistance when the grout flows through the first through hole is small. The second through hole is aligned with the length direction of the first through hole, which facilitates the control of the relative position between the first and second through holes.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] Since the outlet is higher than the lower end of the sealing plug, when the grout overflows from the outlet, the grout has already filled the area inside the grouting sleeve below the sealing plug. In this case, even if the plug seals a small amount of air inside the outlet, the air is mainly concentrated near the higher outlet, that is, mainly concentrated in the discharge channel, so that the inside of the grouting sleeve can be kept as compacted as possible.

[0028] The first through hole forms a concave structure with the inner surface of the outer tube. After the grout solidifies, it forms a protruding structure embedded in the first through hole, which strengthens the connection between the grouting sleeve and the solidified grout. The second through hole forms a concave structure with the outer surface of the inner tube. During the manufacturing of the precast wall panel, after the concrete of the precast wall panel solidifies, it forms a protruding structure embedded in the second through hole, which strengthens the connection between the precast sleeve and the concrete of the precast wall panel.

[0029] The edges of several second through holes in the outer tube are welded and fixed to the inner tube, which strengthens the connection between the inner and outer tubes and reduces the relative axial movement between the inner and outer tubes. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of Example 1 used to illustrate the connection relationship between the grouting sleeve and the reinforcing bar.

[0031] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0032] Figure 3 This is a schematic diagram of the grouting sleeve in Example 2.

[0033] Figure 4 This is a schematic diagram of the grouting sleeve in Example 3.

[0034] Figure 5 This is a schematic diagram of Example 3 illustrating the structure of the inner and outer tubes.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Grouting sleeve; 11. Sleeve body; 111. Inner tube; 1111. Flange; 1112. Discharge hole; 1113. First through hole; 1114. Guide joint; 112. Outer tube; 1121. Upper tube section; 1122. Lower tube section; 1123. Second through hole; 113. Annular chamber; 114. Guide plate; 12. Feed nozzle; 120. Feed inlet; 13. Discharge nozzle; 130. Discharge outlet; 131. Inclined tube section; 132. First horizontal tube section; 133. Second horizontal tube section; 14. Discharge channel; 15. Reinforcing rib; 2. Sealing plug; 21. Connecting groove; 3. Reinforcing bar. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. Example 1

[0038] This application discloses a fully grouted connection structure for steel bar sleeves. (Refer to...) Figure 1 and Figure 2The grouting connection structure of the rebar sleeve includes a grouting sleeve 1 and a sealing plug 2. The sealing plug 2 is located at the upper end of the grouting sleeve 1 and is used to seal the gap between the grouting sleeve 1 and the rebar 3 inserted into the inner side of the grouting sleeve 1. The lower part of the grouting sleeve 1 is connected to a feed nozzle 12. The port of the feed nozzle 12 away from the grouting sleeve 1 serves as the feed inlet 120 of the grouting sleeve 1. The upper part of the grouting sleeve 1 is provided with a discharge nozzle 13. The end of the discharge nozzle 13 away from the grouting sleeve 1 serves as the discharge outlet 130 of the grouting sleeve 1. The inner cavity of the discharge nozzle 13 serves as a discharge channel 14 that connects to the inner cavity of the grouting sleeve 1.

[0039] The discharge nozzle 13 is a curved steel pipe, comprising an inclined section 131, a first horizontal section 132, and a second horizontal section 133. The first horizontal section 132 and the second horizontal section 133 are located at opposite ends of the inclined section 131. The first horizontal section 132 is connected to the peripheral wall of the grouting sleeve 1. The first horizontal section 132 is lower than the second horizontal section 133. The lower end face of the sealing plug 2 is positioned between the first horizontal section 132 and the second horizontal section 133, so that the discharge port 130 is higher than the lower end face of the sealing plug 2, and the discharge channel 14 connects to the area inside the grouting sleeve 1 located below the sealing plug 2.

[0040] A reinforcing rib 15 is connected between the discharge nozzle 13 and the outer circumferential surface of the grouting sleeve 1. The reinforcing rib 15 is welded and fixed to the inclined pipe section 131 of the discharge nozzle 13 and the grouting sleeve 1, respectively. The reinforcing rib 15 can enhance the stability of the connection between the discharge nozzle 13 and the grouting sleeve 1, making the discharge nozzle 13 less prone to tilting and deformation under the action of external force.

[0041] The implementation principle of the fully grouted connection structure of the steel sleeve in this application embodiment is as follows: When grouting the precast wall panel, the grout enters the inner side of the grouting sleeve 1 from the inlet nozzle 12. When the liquid level of the grout in the grouting sleeve 1 rises to the top of the grouting sleeve 1, the grout gradually overflows from the outlet nozzle 13. When the staff observes the overflow of grout, they use a plug to seal the outlet 130.

[0042] Since the outlet 130 is higher than the lower end face of the sealing plug 2, when the grout overflows from the outlet 130, the grout has already filled the space inside the grouting sleeve 1 below the sealing plug 2. In this case, even if the plug seals a small amount of air inside the outlet 130, the air is mainly concentrated near the higher outlet 130, that is, mainly concentrated in the outlet channel 14, so that the inside of the grouting sleeve 1 can be kept as compact as possible. After the grout inside the grouting sleeve 1 solidifies, it serves as a structure connecting the reinforcing bar 3 and the grouting sleeve 1. When the grout fills the grouting sleeve 1, it helps to ensure the structural strength of the solidified grout. Example 2

[0043] The difference between this embodiment and embodiment 1 is that the structure of the discharge nozzle 13 and the sealing plug 2 in this embodiment is different from that in embodiment 1.

[0044] Reference Figure 3 In this embodiment, the discharge nozzle 13 is a straight pipe, and its height is higher than the lower end face of the sealing plug 2. The outer peripheral surface of the sealing plug 2 is provided with a connecting groove 21. The length direction of the connecting groove 21 is along the axial direction of the sealing plug 2. There is a gap between the upper end of the connecting groove 21 and the upper end face of the sealing plug 2. The lower end of the connecting groove 21 penetrates the lower end face of the sealing plug 2, and the inner cavity of the connecting groove 21 is connected to the inner cavity of the discharge nozzle 13.

[0045] Unlike Embodiment 1, in this embodiment, the inner cavity of the discharge nozzle 13 and the inner cavity of the connecting groove 21 together serve as the discharge channel 14. When the liquid level of the grout in the grouting sleeve 1 rises to the top of the grouting sleeve 1, the grout first enters the connecting groove 21, then enters the discharge nozzle 13, and then overflows outward from the discharge nozzle 13. Example 3

[0046] Reference Figure 4 and Figure 5 The fully grouted connection structure of the rebar sleeve includes a grouting sleeve 1 and a sealing plug 2. The sealing plug 2 is located at the upper end of the grouting sleeve 1. The lower part of the grouting sleeve 1 is connected to a feed nozzle 12. The end of the feed nozzle 12 away from the grouting sleeve 1 serves as the feed inlet 120 of the grouting sleeve 1. The upper part of the grouting sleeve 1 is provided with a discharge nozzle 13. The end of the discharge nozzle 13 away from the grouting sleeve 1 serves as the discharge outlet 130 of the grouting sleeve 1. Both the discharge nozzle 13 and the feed nozzle 12 are straight pipes and are parallel to each other.

[0047] The grouting sleeve 1 includes a sleeve body 11 made of steel. The sleeve body 11 includes an inner tube 111 and an outer tube 112. The wall thickness of the inner tube 111 is greater than the wall thickness of the outer tube 112. The sealing plug 2 is located inside the inner tube 111.

[0048] The outer tube 112 is a reducing tube, comprising an upper tube section 1121 and a lower tube section 1122. The lower tube section 1122 is interference-fitted with the inner tube 111. The diameter of the upper tube section 1121 is larger than the diameter of the lower tube section 1122. An annular chamber 113 is formed between the upper tube section 1121 and the inner tube 111. The upper end of the inner tube 111 is provided with a flange 1111. The edge of the upper tube section 1121 is welded and fixed to the flange 1111. 1. A closed annular cavity 113 is formed between the upper pipe section 1121 and the inner pipe 111. A discharge nozzle 13 is connected to the upper pipe section 1121, and the discharge nozzle 13 is higher than the lower end face of the sealing plug 2. The inner cavity of the discharge nozzle 13 communicates with the annular cavity 113 and together serve as a discharge channel 14. A discharge hole 1112 is provided at the upper part of the inner pipe 111, and the discharge hole 1112 communicates with the annular cavity 113. The discharge hole 1112 is lower than the lower end face of the sealing plug 2. The discharge hole 1112 and the discharge port 130 are located on both sides of the centerline of the grouting sleeve 1.

[0049] After the grout enters the inner tube 111, as the grout level rises, the grout enters the annular chamber 113 through the discharge hole 1112 from the inner tube 111, and then enters the discharge nozzle 13 from the annular chamber 113. It then flows out from the discharge nozzle 13. When the discharge nozzle 13 is higher than the end face of the sealing plug 2, when the plug seals a small amount of air inside the discharge port 130, the air is mainly concentrated near the higher discharge port 130 and is not easy to enter the grouting sleeve 1. This helps the grout to fill the inside of the grouting sleeve 1 tightly, thereby ensuring the connection strength between the grouting sleeve 1 and the reinforcing bar 3.

[0050] In addition, the discharge hole 1112 and the outlet 130 are located on both sides of the center line of the grouting sleeve 1, respectively. When the grout enters the annular cavity 113 from the inner tube 111, it is not easy to directly enter the outlet nozzle 13, which helps to fill the annular cavity 113 as much as possible.

[0051] The inner tube 111 is provided with multiple first through holes 1113, which are evenly distributed in the lower section 1122 of the outer tube 111 corresponding to the inner tube 111. The outer tube 112 is provided with multiple second through holes 1123, which are evenly distributed in the lower section 1122. The first through holes 1113 and second through holes 1123 are staggered. Both the first through holes 1113 and the second through holes 1123 are elongated holes, which can be oblong, elliptical, or rectangular with rounded corners. The minor axis of the first through hole 1113 and the major axis of the second through hole 1123 are both along the axial direction of the grouting sleeve 1.

[0052] The first through hole 1113 and the inner surface of the outer tube 112 form a concave structure. After the grout solidifies, a protruding structure is formed that is embedded in the first through hole 1113, which strengthens the connection between the grouting sleeve 1 and the solidified grout. The second through hole 1123 and the outer surface of the inner tube 111 form a concave structure. During the manufacturing of the precast wall panel, after the concrete of the precast wall panel solidifies, a protruding structure is formed that is embedded in the second through hole 1123, which strengthens the connection between the precast sleeve and the concrete of the precast wall panel.

[0053] The edges of several of the second through holes 1123 in the outer tube 112 are welded and fixed to the inner tube 111, thereby strengthening the connection between the outer tube 112 and the inner tube 111. The welding method between the edges of the second through holes 1123 and the inner tube 111 is spot welding.

[0054] The outer circumferential surface of the inner tube 111 is provided with a guide slot 1114, which is set along the length of the inner tube 111. The two ends of the guide slot 1114 penetrate the two end faces of the inner tube 111. A guide piece 114 is welded and fixed to the inner circumferential surface of the upper tube section 1121. The height dimension of the guide piece 114 is smaller than the height dimension of the annular chamber 113. A gap is left between the guide piece 114 and the upward inner surface of the annular chamber 113. The side edge of the guide piece 114 away from the fixed side is inserted into the guide slot 1114.

[0055] The inner tube 111 and the outer tube 112 of the grouting sleeve 1 are interference-fitted. When the inner tube 111 and the outer tube 112 are inserted into each other, the guide plate 114 and the guide slot 1114 can guide the inner tube 111 and the outer tube 112 to help ensure that the first through hole 1113 and the second through hole 1123 maintain a mutually misaligned positional relationship.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully grouted connection structure for reinforcing bar sleeves, characterized in that, The grouting sleeve includes a grouting sleeve (1) and a sealing plug (2). The sealing plug (2) is located at the upper end of the grouting sleeve (1). The lower part of the grouting sleeve (1) is provided with a feed inlet (120), and the upper part of the grouting sleeve (1) is provided with a discharge outlet (130). The lower end face of the sealing plug (2) is lower than the discharge outlet (130). The grouting sleeve (1) is provided with a discharge channel (14). One end of the discharge channel (14) is connected to the discharge outlet (130), and the other end of the discharge channel (14) is connected to the area inside the grouting sleeve (1) located below the sealing plug (2). The grouting sleeve (1) includes a sleeve body (11), which includes an inner tube (111) and an outer tube (112). The inner tube (111) and the outer tube (112) are press-fitted together. The inner tube (111) is provided with a plurality of first through holes (1113), and the outer tube (112) is provided with a plurality of second through holes (1123). The first through holes (1113) and the second through holes (1123) are staggered. The sealing plug (2) is located inside the inner tube (111). The outer tube (112) is a reducing pipe. (112) includes an upper pipe section (1121) and a lower pipe section (1122). The lower pipe section (1122) is press-fitted with the inner tube (111). The second through hole (1123) is distributed in the lower pipe section (1122). The diameter of the upper pipe section (1121) is larger than the diameter of the lower pipe section (1122). An annular cavity (113) is formed between the upper pipe section (1121) and the inner tube (111). The upper end of the inner tube (111) is provided with a flange (1111). The flange (1111) closes the upper pipe section (1121) and the inner tube. The inner tube (111) is connected to an annular cavity (113); the upper tube section (1121) is connected to a discharge nozzle (13), the end of the discharge nozzle (13) away from the upper tube section (1121) serves as a discharge port (130), the inner cavity of the discharge nozzle (13) is connected to the annular cavity (113) and together serve as the discharge channel (14), the upper part of the inner tube (111) is provided with a discharge hole (1112), the discharge hole (1112) is connected to the annular cavity (113), and the discharge hole (1112) is lower than the lower end face of the sealing plug (2).

2. The fully grouted steel sleeve connection structure according to claim 1, characterized in that: The outer circumferential surface of the inner tube (111) is provided with a guide slot (1114), the guide slot (1114) is arranged along the length direction of the inner tube (111), and the two ends of the guide slot (1114) penetrate the two end faces of the inner tube (111); the inner circumferential surface of the upper tube section (1121) is fixedly connected with a guide piece (114), and the side edge of the guide piece (114) away from the fixed side is inserted into the guide slot (1114).

3. The fully grouted steel bar sleeve connection structure according to claim 1, characterized in that: The discharge hole (1112) and the outlet (130) are located on both sides of the center line of the grouting sleeve (1).

4. The fully grouted steel bar sleeve connection structure according to claim 1, characterized in that: The wall thickness of the inner tube (111) is greater than that of the outer tube (112), and the edges of a plurality of the second through holes (1123) of the outer tube (112) are welded and fixed to the inner tube (111).

5. The fully grouted steel sleeve connection structure according to claim 1, characterized in that: Both the first through hole (1113) and the second through hole (1123) are elongated holes, and the short axis of the first through hole (1113) and the long axis of the second through hole (1123) are along the axial direction of the grouting sleeve (1).

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