Prefabricated concrete column connecting structure

Abstract

The utility model provides a precast concrete column connecting structure which comprises an upper concrete column and a lower concrete column, an upper column steel pipe and a lower column steel pipe are respectively embedded at the connecting ends of the upper concrete column and the lower concrete column, and a plurality of upper column steel pipe flanges and lower column steel pipe flanges which are correspondingly protruded are arranged on the peripheral sides of the upper column steel pipe and the lower column steel pipe. During construction, the purposes of horizontal and vertical adjustment, upper and lower steel pipe positioning, temporary fixing and self-supporting are achieved by locking and fixing the connecting plates and flange positioning holes of the upper and lower columns. When the structure is installed, lug plates for connecting the upper and lower column steel pipes do not need to be additionally welded, levelness and perpendicularity do not need to be adjusted, a prefabricated part supporting device does not need to be arranged, and meanwhile the problem that the column corner longitudinal bars are difficult to overlap and weld at the corners of the steel pipes is solved. The manufacturing cost can be reduced; after the upper and lower column steel pipes are welded, grouting materials are used inside and outside the steel pipes for one-time pouring forming, the structural stress stability is improved, and the purposes of corrosion prevention and fire prevention are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fabricated building, concretely relates to a prefabricated concrete column connecting structure. BACKGROUND

[0002] The conventional fabricated concrete structure or combined structure usually adopts the forms of grouting sleeve connection, flange bolt connection or on-site welding for the connection of the prefabricated column.

[0003] The grouting sleeve connection is to embed a grouting sleeve at the end of the column, and to realize the reliable connection between the prefabricated components by the embedded sleeve and high-strength grouting material. This structure has two problems. First, the grouting quality of the sleeve is not easy to guarantee. Second, temporary support needs to be set up, and the construction is complicated. The bolt flange connection needs to set a flange plate at the end of the prefabricated column, and the flange plates of the upper and lower prefabricated columns are fastened and connected together by bolts to realize the reliable connection between the prefabricated columns. This structure has two problems. First, the cost of the flange plate and high-strength bolt is high. Second, in order to meet the bolt margin and spacing requirements, the flange plate is easy to protrude from the edge of the column or not to meet the protection layer requirements, which affects the use and durability, etc. The on-site welding needs to pre-weld a connecting lug plate on the upper and lower combined columns, and the upper and lower columns are temporarily fixed by the connecting plate and bolts. After the welding of the upper and lower columns is completed, the lug plate is cut off. This structure has two problems. First, the construction is complicated. Second, the cost is high.

[0004] The welding of the steel pipe and the steel bar generally adopts the form of lap welding. In order to reduce the lap length and reduce the eccentric force of the steel bar, the form of double-sided lap welding is generally adopted. The longitudinal reinforcement in the middle of the column can be attached to the wall of the steel pipe, and the steel bars on both sides are welded to the wall of the steel pipe. However, for the lap welding of the longitudinal reinforcement and the corner of the steel pipe, the stress of the two-sided welds is close, and when the steel plate is welded to the steel plate, the welds will overlap, which will adversely affect the welding quality of the longitudinal reinforcement and the steel pipe. SUMMARY

[0005] The main purpose of the utility model is to provide a prefabricated concrete column connecting structure, which solves the problems in the above background technology.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme of: including a concrete upper column and a concrete lower column, an upper column steel pipe and a lower column steel pipe are embedded at the connecting end of the concrete upper column and the concrete lower column respectively, a plurality of corresponding protruding upper column steel pipe flanges and lower column steel pipe flanges are arranged on the circumferential side of the upper column steel pipe and the lower column steel pipe, and the corresponding flanges are locked and fixed by flange connecting plates and bolts.

[0007] Preferably, the upper column middle longitudinal reinforcement around the concrete upper column is double-sided lap welded to the outer wall of the upper column steel pipe, and the upper column corner longitudinal reinforcement at the four corners is lap welded to one side of the outer wall of the upper column steel pipe and the other side of the outer wall of the upper column steel pipe flange;

[0008] The double-face lap welding of the lower column middle longitudinal reinforcement around the concrete lower column is welded on the outer wall of the lower column steel pipe, and the lower column corner longitudinal reinforcement on one side is lap welded on the outer wall of the lower column steel pipe and lap welded on the outer wall of the lower column steel pipe flange on the other side.

[0009] Preferably, the upper column steel pipe is provided with a plurality of upper column steel pipe flanges on the circumferential side, and a plurality of upper column flange positioning holes are arranged on the upper column steel pipe flanges.

[0010] The lower column steel pipe is provided with a plurality of lower column steel pipe flanges on the circumferential side, and a plurality of lower column flange positioning holes are arranged on the lower column steel pipe flanges.

[0011] The upper column steel pipe flange corresponds to the lower column steel pipe flange, and the flange connecting plate is connected to the upper column steel pipe and the lower column steel pipe by penetrating the upper column flange positioning hole and the lower column flange positioning hole through bolts.

[0012] Preferably, a lining plate is fixedly arranged on the inner side of the top of the lower column steel pipe, and the lining plate protrudes from the top of the lower column steel pipe.

[0013] During installation, the lining plate abuts against the inner wall of the upper column steel pipe.

[0014] Preferably, the bottom of the upper column steel pipe abuts against the lower column steel pipe, and each side of the bottom of the upper column steel pipe is provided with a bevel for welding and fixing with the lower column steel pipe.

[0015] Preferably, an upper column inner partition plate is fixedly arranged in the upper column steel pipe, and a gas outlet pipe and a grouting pipe are embedded in the concrete upper column, one end of the gas outlet pipe and the grouting pipe is flush with the forming surface of the concrete upper column, the other end of the gas outlet pipe communicates with the upper column inner partition plate, and the other end of the grouting pipe penetrates through the upper column inner partition plate and is located in the lower column steel pipe.

[0016] Preferably, a lower column inner partition plate is fixedly arranged in the lower column steel pipe, and a grouting hole is arranged on the outer side of the lower column steel pipe, and the grouting hole is located on the upper part of the lower column inner partition plate.

[0017] Preferably, the upper column steel pipe and the lower column steel pipe are welded into a rectangle by four steel plates, the protruding part of the steel plate is a flange, and the structure of the upper column steel pipe and the lower column steel pipe is the same.

[0018] The utility model provides a prefabricated concrete column connecting structure, and has the beneficial effects that:

[0019] 1. The conflict between the requirement of bolt hole edge distance and interval and the requirement of sufficient concrete protection layer for the outermost edge of the steel connecting piece is solved, that is, the column bolt hole opening meets the specification, and the concrete protection layer of the outermost edge of the steel connecting piece meets the specification.

[0020] 2. The lower column corner longitudinal reinforcement can be welded on the same steel plate when the lower column corner longitudinal reinforcement is double-face lap welded with the steel connecting piece, and the problems of weld overlap and welding quality are avoided.

[0021] 3. The upper and lower steel connecting pieces are steel pipes with flanges, the flanges of the steel pipes extending out of the concrete column body part to adjust the horizontal and vertical problems of the upper and lower columns, without the need of welding the ear plates connecting the upper and lower columns separately on site, so that the horizontal and vertical degrees of the upper and lower columns can be adjusted better, and the construction cost and labor cost are greatly reduced;

[0022] 4. The upper column and the lower column are fixed by using bolts and flange connecting plates, so that self-supporting can be realized, without the need of scaffolds and supporting devices during assembly, labor cost is saved, and the construction period is shortened;

[0023] 5. The steel pipe has large section size and is single, so that the quality of secondary grouting is easy to guarantee;

[0024] 6. After the steel connecting pieces are installed, the formwork is supported outside the column body, and the grouting pipe is grouted from inside to outside of the flange steel pipe at one time, so that the stress is better, the construction is more convenient, and the structure is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further explained in connection with the drawings and embodiments:

[0026] Figure 1 is the overall structure of the utility model axial side view;

[0027] Figure 2 is the perspective view of the utility model Figure 1 ;

[0028] Figure 3 is the explosion view of the utility model Figure 1 ;

[0029] Figure 4 is the connecting section view of the upper column steel pipe and the lower column steel pipe of the utility model;

[0030] Figure 5 is another view of the utility model Figure 4 ;

[0031] Figure 6 is the first structure of the upper column steel pipe and the lower column steel pipe of the utility model;

[0032] Figure 7 is the second structure of the upper column steel pipe and the lower column steel pipe of the utility model;

[0033] Figure 8 is the third structure of the upper column steel pipe and the lower column steel pipe of the utility model;

[0034] Figure 9 is the fourth structure of the upper column steel pipe and the lower column steel pipe of the utility model;

[0035] In the diagram: 1. Concrete upper column; 101. Longitudinal reinforcement in the middle of the upper column; 102. Stirrups in the upper column; 103. Longitudinal reinforcement at the corner of the upper column; 2. Vent pipe; 3. Grouting pipe; 4. Grouting hole; 5. Concrete lower column; 501. Longitudinal reinforcement in the middle of the lower column; 502. Stirrups in the lower column; 503. Longitudinal reinforcement at the corner of the lower column; 6. Steel pipe in the upper column; 601. Bevel; 602. Flange of the steel pipe in the upper column; 603. Positioning hole of the flange of the upper column; 604. Inner partition of the upper column; 7. Steel pipe in the lower column; 701. Flange of the steel pipe in the lower column; 702. Positioning hole of the flange of the lower column; 703. Inner partition of the lower column; 8. Flange connecting plate; 9. Lining plate. Detailed Implementation

[0036] like Figures 1-9 As shown, a precast concrete column connection structure includes an upper concrete column 1 and a lower concrete column 5. An upper column steel pipe 6 and a lower column steel pipe 7 are pre-embedded at the connection ends of the upper concrete column 1 and the lower concrete column 5, respectively. Multiple corresponding protruding upper column steel pipe flanges 602 and lower column steel pipe flanges 701 are provided on the periphery of the upper column steel pipe 6 and the lower column steel pipe 7. The corresponding flanges are locked and fixed together by flange connecting plates 8 and bolts.

[0037] The upper concrete column 1 and the lower concrete column 5 are connected by the upper column steel pipe 6 and the lower column steel pipe 7 abutting against each other. The upper column steel pipe 6 and the lower column steel pipe 7 protruding flanges 602 and 701 on the periphery of the upper column steel pipe 6 and the lower column steel pipe 7 are connected by flange connecting plates 8 and bolts, thereby achieving locking and fixing. There is no need to weld the upper and lower ear plates separately on site. The connection and locking through the flange connecting plates 8 can better adjust the horizontal and verticality of the upper and lower columns. The steel pipe is pre-embedded in the concrete part to solve the problem of double-sided welding of the longitudinal reinforcement at the column corner. The part protruding from the concrete column body can adjust the horizontal and verticality of the upper and lower columns, which greatly reduces the construction cost and labor cost.

[0038] Preferably, the longitudinal reinforcement 101 in the middle of the upper column 1 is lap-welded to the outer wall of the upper column steel pipe 6 on both sides, and the longitudinal reinforcement 103 at the corner of the upper column is lap-welded to the outer wall of the upper column steel pipe 6 on one side and lap-welded to the outer wall of the upper column steel pipe flange 602 on the other side.

[0039] The longitudinal reinforcement 501 in the middle of the inner perimeter of the concrete lower column 5 is lapped and welded to the outer wall of the lower column steel pipe 7 on both sides. The longitudinal reinforcement 503 at the corner of the lower column is lapped and welded to the outer wall of the lower column steel pipe 7 on one side and to the outer wall of the lower column steel pipe flange 701 on the other side.

[0040] This design ensures that the outermost edge of the steel connector has a concrete cover that meets the specifications, solves the problem of double-sided lap welding of longitudinal reinforcement and steel pipe at column corners, and improves the quality of reinforcement connections. Furthermore, this design eliminates the need for connecting lugs, thereby reducing material costs. The upper and lower columns can be self-supporting during construction, eliminating the need for scaffolding and support devices, thus reducing construction costs.

[0041] Preferably, the upper column steel pipe 6 is provided with a plurality of upper column steel pipe flanges 602 on the circumferential side, and a plurality of upper column flange positioning holes 603 are arranged on the upper column steel pipe flanges 602;

[0042] The lower column steel pipe 7 is provided with a plurality of lower column steel pipe flanges 701 on the circumferential side, and a plurality of lower column flange positioning holes 702 are arranged on the lower column steel pipe flanges 701;

[0043] The upper column steel pipe flanges 602 correspond to the lower column steel pipe flanges 701, and the flange connecting plate 8 is connected to the upper column steel pipe 6 and the lower column steel pipe 7 by passing through the upper column flange positioning hole 603 and the lower column flange positioning hole 702.

[0044] The flange connecting plate 8 and the bolt can well connect and lock the upper column steel pipe 6 and the lower column steel pipe 7, and also ensure the horizontal and vertical degrees.

[0045] By arranging the flange positioning holes 603 and 702, the upper and lower column steel pipes can be accurately aligned during installation, avoiding deviation caused by construction errors. The use of the flange connecting plate 8 and the bolt fastening method not only improves the reliability of the connection, but also enhances the stability of the overall structure. The design of the flange connecting plate 8 and the bolt connection can effectively adjust and ensure the horizontal and vertical degrees of the upper and lower columns, improving the overall quality of the building. Compared with the traditional on-site welding method, this connection method greatly simplifies the construction process, reduces the on-site operation time and difficulty, and improves the construction efficiency.

[0046] Preferably, the lower column steel pipe 7 is provided with a lining plate 9 on the top inner side, and the lining plate 9 protrudes from the top of the lower column steel pipe 7;

[0047] During installation, the lining plate 9 abuts against the inner wall of the upper column steel pipe 6.

[0048] The design of the lining plate 9 makes the upper and lower column steel pipes not only connected by the external flange connecting plate 8 and the bolt, but also positioned by the internal lining plate 9, reducing the risk of failure and ensuring the quality of the bevel welding.

[0049] Preferably, the upper column steel pipe 6 abuts against the lower column steel pipe 7, and each edge of the bottom of the upper column steel pipe 6 is provided with a bevel 601 for welding and fixing with the lower column steel pipe 7.

[0050] After the upper column steel pipe 6 is installed and fixed against the lower column steel pipe 7, it is further fixed by welding.

[0051] Through the flange connection positioning and bevel welding fixation, the connection precision and strength between the upper and lower column steel pipes can be significantly improved, ensuring that they will not loosen or fail under large load. The lining plate and the bevel make the welding operation easier to control, ensuring the quality and uniformity of the weld, thereby improving the construction precision.

[0052] This design achieves the goal of mechanical positioning and connection in the early stage and welding connection in the later stage. On the one hand, bolts and flange connecting plates provide positioning and fixation during the construction stage; on the other hand, welding and post-grouting achieve the compressive strength of the connection point and the stability of the overall structure.

[0053] Preferably, an inner partition plate 604 is fixed inside the upper column steel pipe 6, and an air vent pipe 2 and a grouting pipe 3 are pre-embedded inside the concrete upper column 1. One end of the air vent pipe 2 and the grouting pipe 3 are flush with the forming surface of the concrete upper column 1, and the other end of the air vent pipe 2 is connected to the inner partition plate 604. The other end of the grouting pipe 3 passes through the inner partition plate 604 and is located inside the lower column steel pipe 7.

[0054] The lower column steel pipe 7 is fixedly equipped with a lower column inner partition plate 703, and the lower column steel pipe 7 is provided with a grout outlet hole 4 on the outside, which is located above the lower column inner partition plate 703.

[0055] During the pouring of the joint, grout is injected into the upper column steel pipe 6 and the lower column steel pipe 7 through the grouting pipe 3, the vent pipe 2 is used for venting, and the grout outlet hole 4 is used to ensure that the joint is fully grouted inside and out.

[0056] The upper column inner diaphragm 604 and the lower column inner diaphragm 703 not only serve as templates during precast column production but also reduce the impact of welding temperature on the column concrete during on-site welding. This design ensures production efficiency and product quality. It is suitable for various complex construction environments and conditions, and is particularly suitable for building projects with high requirements for earthquake resistance and wind resistance.

[0057] Preferred, such as Figures 6-9 As shown, the upper column steel pipe 6 and the lower column steel pipe 7 are formed by welding four steel plates into a rectangle. The protruding parts of the steel plates are flanges. The upper column steel pipe 6 and the lower column steel pipe 7 have the same structure. Select a suitable structure according to the site conditions.

[0058] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A precast concrete column connection structure comprising a concrete upper column (1) and a concrete lower column (5), characterized in that: The upper column steel pipe (6) and the lower column steel pipe (7) are provided with a plurality of corresponding protruding upper column steel pipe flanges (602) and lower column steel pipe flanges (701) on the circumferential side of the upper column steel pipe (6) and the lower column steel pipe (7), and the corresponding flanges are fixed by the flange connecting plate (8) and the bolt locking.

2. A precast concrete column connection according to claim 1, wherein the concrete The upper column (1) is provided with upper column middle part longitudinal reinforcement (101) on the four circumferences of the upper column (1), which is double-sided lap-welded on the outer wall of the upper column steel pipe (6); the upper column corner part longitudinal reinforcement (103) is lap-welded on one side of the outer wall of the upper column steel pipe (6) and on the other side of the outer wall of the upper column steel pipe flange (602). The concrete lower column (5) is provided with lower column middle part longitudinal reinforcement (501) on the four circumferences of the concrete lower column (5), which is double-sided lap-welded on the outer wall of the lower column steel pipe (7); the lower column corner part longitudinal reinforcement (503) is lap-welded on one side of the outer wall of the lower column steel pipe (7) and on the other side of the outer wall of the lower column steel pipe flange (701).

3. The precast concrete column connection of claim 1, wherein: The upper column steel pipe (6) is provided with a plurality of upper column steel pipe flanges (602) on the circumferential side of the upper column steel pipe (6), and the upper column steel pipe flange (602) is provided with a plurality of upper column flange positioning holes (603). The lower column steel pipe (7) is provided with a plurality of lower column steel pipe flanges (701) on the circumferential side of the lower column steel pipe (7), and the lower column steel pipe flange (701) is provided with a plurality of lower column flange positioning holes (702). The upper column steel pipe flange (602) corresponds to the lower column steel pipe flange (701), and the flange connecting plate (8) is connected to the upper column steel pipe (6) and the lower column steel pipe (7) by passing through the upper column flange positioning hole (603) and the lower column flange positioning hole (702) through the bolt.

4. The precast concrete column connection of claim 1, wherein: The lower column steel pipe (7) is provided with a lining plate (9) on the inner side of the top of the lower column steel pipe (7), and the lining plate (9) protrudes from the top of the lower column steel pipe (7). During installation, the lining plate (9) abuts against the inner wall of the upper column steel pipe (6).

5. The precast concrete column connection of claim 1, wherein: The upper column steel pipe (6) abuts against the lower column steel pipe (7) at the bottom, and each side of the bottom of the upper column steel pipe (6) is provided with a bevel (601) for welding and fixing with the lower column steel pipe (7).

6. The precast concrete column connection of claim 1, wherein: The upper column steel pipe (6) is provided with an upper column inner partition plate (604), the concrete upper column (1) is provided with a gas outlet pipe (2) and a grouting pipe (3), one end of the gas outlet pipe (2) and the grouting pipe (3) is flush with the molding surface of the concrete upper column (1), the other end of the gas outlet pipe (2) communicates with the upper column inner partition plate (604), and the other end of the grouting pipe (3) passes through the upper column inner partition plate (604) and is located in the lower column steel pipe (7).

7. The precast concrete column connection of claim 1, wherein: The lower column steel pipe (7) is provided with a lower column inner partition plate (703), and the lower column steel pipe (7) is provided with a grout outlet hole (4) on the outer side of the lower column steel pipe (7), and the grout outlet hole (4) is located on the upper part of the lower column inner partition plate (703).

8. The precast concrete column connection of claim 1, wherein: The upper column steel pipe (6) and the lower column steel pipe (7) are welded into a rectangle by four steel plates, the protruding part of the steel plate is a flange, and the structure of the upper column steel pipe (6) and the lower column steel pipe (7) is the same.

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