Fabricated beam-column connecting structure and construction method

Abstract

The invention relates to the field of house building construction, and particularly discloses a fabricated beam-column connecting structure and a construction method. The assembly type beam column connecting structure comprises a prefabricated beam, an upper prefabricated column and a lower prefabricated column, a through hole is formed in the prefabricated beam in a penetrating mode in the vertical direction, a transverse steel bar is arranged in the prefabricated beam and penetrates through the through hole, the two sides of the through hole communicate with an upper inserting groove and a lower inserting groove correspondingly, the upper prefabricated column is inserted into the upper inserting groove, and the lower prefabricated column is inserted into the lower inserting groove; a first vertical steel bar is arranged in the prefabricated upper column, a slurry outlet groove communicating with the through hole is formed in the side, close to the prefabricated cross beam, of the prefabricated upper column, and one side of the slurry outlet groove communicates with a slurry outlet hole. Second vertical steel bars are arranged in the prefabricated lower columns, slurry inlet grooves communicating with the through holes are formed in the sides, close to the prefabricated cross beams, of the prefabricated lower columns, and slurry inlet holes communicate with one sides of the slurry inlet grooves. The diameter of the through holes is large, flowing of grouting materials is facilitated, the compactness of the grouting materials is improved, and the comprehensive strength of the beam-column connecting structure is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to an assembled beam-column connection structure and a construction method. Background Art

[0002] Prefabricated buildings are a type of building promoted by the construction industry to achieve green, environmentally friendly and sustainable development. They have the advantages of fast construction speed, less construction site operations, less seasonal impact and stable quality. At present, the construction method of prefabricated buildings is usually: prefabricate concrete components or steel components in the factory, transport them to the construction site and then assemble them directly. Compared with the traditional cast-in-place construction method, the construction time is short and the construction efficiency is high.

[0003] A Chinese patent with publication number CN113431410A discloses an assembled beam-column connection structure connected by sleeve grouting, comprising: a prefabricated beam, comprising a core structure area provided with a through hole, a sleeve installed in the through hole, the core structure area and the prefabricated beam being prefabricated as one piece; a prefabricated lower column, arranged on a first side of the core structure area; a prefabricated upper column, arranged on a second side of the core structure area; anchor steel bars are provided at ends of the prefabricated lower column and the prefabricated upper column close to the core structure area, the anchor steel bars are inserted into the sleeve, and the sleeve and the anchor steel bars are connected by grouting material.

[0004] The beam-column connection structure disclosed in the above patent has the advantages of both factory prefabrication and cast-in-place construction, improves the integrity of the connection node, and thus improves the comprehensive strength of the core structure area, and has good seismic performance. However, there are still the following technical defects: the grouting channel is relatively narrow, which affects the fluidity of the grouting material, making it difficult to ensure the density of the grouting material, and thus affecting the comprehensive strength of the core structure area. Summary of the invention

[0005] In order to facilitate the circulation and compactness of poured grouting materials, the present invention provides an assembled beam-column connection structure and a construction method.

[0006] In the first aspect, the present invention provides an assembled beam-column connection structure adopting the following technical solution: An assembled beam-column connection structure comprises a prefabricated crossbeam, a prefabricated upper column and a prefabricated lower column, wherein the prefabricated crossbeam is provided with a through hole in the vertical direction, a transverse steel bar is provided inside the prefabricated crossbeam, and the transverse steel bar passes through the through hole, and an upper slot and a lower slot are connected on both sides of the through hole, wherein the upper slot is for inserting the prefabricated upper column, and the lower slot is for inserting the prefabricated lower column; A first vertical steel bar is arranged inside the prefabricated upper column, and a slurry outlet groove connected to the through hole is arranged on one side of the prefabricated upper column close to the prefabricated cross beam, and a slurry outlet hole is connected to one side of the slurry outlet groove; A second vertical steel bar is arranged inside the prefabricated lower column, and a grouting groove connected to the through hole is arranged on one side of the prefabricated lower column close to the prefabricated cross beam, and a grouting hole is connected to one side of the grouting groove, and the first vertical steel bar and the second vertical steel bar both extend into the through hole at their facing ends.

[0007] By adopting the above technical scheme, firstly, the diameter of the through hole is large, which is conducive to the flow of the grouting material, thereby improving the density of the grouting material and ensuring the comprehensive strength of the beam-column connection structure; secondly, the components are prefabricated in the factory, the on-site assembly construction steps are few, and the construction efficiency is high; thirdly, the beam-column connection structure is evenly arranged with transverse and vertical steel bars, and the structural strength is high.

[0008] Optionally, a connecting piece is connected between the first vertical steel bar and the second vertical steel bar, and the connecting piece includes two symmetrically arranged half cylinders, the lower ends of the two half cylinders are plugged in, and the outer sides of the upper ends are commonly threaded with a fastening ring, and an upper connecting cavity for inserting the first vertical steel bar and a lower connecting cavity for inserting the second vertical steel bar are formed between the two half cylinders.

[0009] By adopting the above technical solution, the first vertical steel bar and the second vertical steel bar are connected by a connecting piece, so that the longitudinal tensile strength is improved and the vertical steel bars are not easily skewed when pouring grout, thereby ensuring the structural strength.

[0010] Optionally, grooves for inserting transverse steel bars are provided on opposite sides of the two half cylinders, and the grooves are connected to the lower connecting cavity.

[0011] By adopting the above technical solution, firstly, a connection is formed between the transverse steel bars and the vertical steel bars, and secondly, the grooves can allow slurry to enter the connecting pieces, which is beneficial to improving the comprehensive strength of the beam-column connection structure.

[0012] Optionally, a liquid conducting groove is provided on the inner wall of the lower connecting cavity, and the liquid conducting groove is communicated with the groove.

[0013] By adopting the above technical solution, the liquid guide groove is used for slurry circulation, thereby further improving the comprehensive strength of the beam-column connection structure.

[0014] Optionally, a fastening hole communicating with the upper connecting cavity is penetrated through the upper end of the half cylinder, a fastening block is slidably arranged inside the fastening hole, and an annular groove for inserting the fastening block is arranged on the outer side of the first vertical steel bar.

[0015] By adopting the above technical solution, when pouring grouting material, the fastening block is compressed and moves close to the first vertical steel bar until the fastening block is inserted into the annular groove, thereby improving the connection tightness between the first vertical steel bar and the connecting piece.

[0016] Optionally, an inclined surface is provided on the upper side of one end of the fastening block close to the first vertical steel bar, and a pressure plate is fixedly connected to the other end. A limiting groove connected to the fastening hole is provided on the outer wall of the semi-cylinder, and the limiting groove is for the pressure plate to be inserted.

[0017] By adopting the above technical solution, firstly, it is convenient to insert the first vertical steel bar into the upper connecting cavity, and secondly, it is convenient for the fastening block to move under the action of the pouring pressure.

[0018] Optionally, the lower ends of the two half-cylinders are respectively provided with an insertion rod and a insertion hole, and the insertion rod is inserted into the corresponding insertion hole.

[0019] By adopting the above technical solution, the installation is convenient. The two half cylinders are plugged into each other and then the fastening ring is screwed.

[0020] Optionally, a pressure valve is provided at the slurry outlet hole, and the pressure valve includes a valve body, a valve cover connected to the valve body, a piston arranged inside the valve body, and a spring arranged between the valve cover and the piston. The inner cavity of the valve body is connected to the slurry outlet hole, and the piston is opposite to the slurry outlet hole. The side wall of the valve body is provided with an air outlet hole and a liquid outlet hole, and the liquid outlet hole is located on the side of the air outlet hole away from the slurry outlet hole.

[0021] By adopting the above technical solution, the grouting hole is blocked, which is conducive to increasing the injection pressure. When injecting grouting material, the air inside first pushes the piston to move until the air outlet hole is exposed and the air is discharged; when the grouting material is full to the grouting hole, the grouting material is difficult to flow out of the air outlet hole, and the pressure is further increased, pushing the piston to continue moving until the liquid outlet hole is exposed. When the grouting material flows out of the liquid outlet hole, it means that the injection is completed.

[0022] Optionally, a connecting pipe is provided on the inner wall of the slurry outlet hole, and the connecting pipe is threadedly connected to the valve body.

[0023] By adopting the above technical solution, the pressure valve is easy to disassemble and assemble, and can be reused many times.

[0024] In a second aspect, the present invention provides a construction method for an assembled beam-column connection structure using the following technical solution: A construction method for an assembled beam-column connection structure comprises the following steps: S1, prefabricated beams, prefabricated upper columns and prefabricated lower columns are manufactured in the factory in advance and then transported to the construction site; S2, placing the prefabricated cross beam on the upper side of the prefabricated lower column, and inserting the prefabricated lower column into the lower slot, and then placing the prefabricated upper column on the upper side of the prefabricated cross beam, and inserting the prefabricated upper column into the upper slot; S3, inject grouting material into the grouting hole to fill the through hole, wait for the grouting material to solidify, and complete the construction.

[0025] By adopting the above technical solution, the construction efficiency is high and the construction period is short.

[0026] In summary, the present invention has the following beneficial effects: 1. The large diameter of the through hole is conducive to the flow of grouting materials, thereby improving the density of the grouting materials and ensuring the comprehensive strength of the beam-column connection structure; 2. The components are prefabricated in the factory, with fewer on-site assembly steps and high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of an assembled beam-column connection structure according to an embodiment of the present invention; Figure 2 is a cross-sectional schematic diagram of an assembled beam-column connection structure according to an embodiment of the present invention; Figure 3 yes Figure 2 A magnified schematic diagram of the middle A area; Figure 4 It is a schematic structural diagram of a transverse steel bar, a first vertical steel bar, a second vertical steel bar and a connecting piece according to an embodiment of the present invention; Figure 5 is a cross-sectional schematic diagram of a connecting piece according to an embodiment of the present invention; Figure 6 Schematic diagram of an exploded view of a connector according to an embodiment of the present invention.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. prefabricated crossbeam; 11. transverse reinforcement; 12. through hole; 13. upper slot; 14. lower slot; 2. prefabricated upper column; 21. first vertical reinforcement; 211. annular groove; 22. slurry outlet groove; 23. slurry outlet hole; 3. prefabricated lower column; 31. second vertical reinforcement; 32. slurry inlet groove; 33. slurry inlet hole; 4. connecting piece; 41. half cylinder; 411. groove; 412. fastening hole; 413. limiting groove; 414. insertion rod; 415. insertion hole; 42. fastening ring; 43. upper connecting cavity; 44. lower connecting cavity; 45. liquid guide groove; 46. fastening block; 461. inclined surface; 47. pressure plate; 5. pressure valve; 51. valve body; 511. air outlet; 512. liquid outlet; 52. valve cover; 53. piston; 54. spring; 6. connecting pipe. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 The present invention is described in further detail.

[0030] The embodiments of the present invention disclose an assembled beam-column connection structure and a construction method.

[0031] Reference Figure 1The assembled beam-column connection structure comprises a prefabricated cross beam 1, and the upper and lower sides of the prefabricated cross beam 1 are respectively plugged with a prefabricated upper column 2 and a prefabricated lower column 3. The prefabricated cross beam 1, the prefabricated upper column 2 and the prefabricated lower column 3 are all reinforced concrete structures, which are manufactured in a factory, have few on-site assembly construction steps, and have high construction efficiency.

[0032] Reference Figure 1 , Figure 2 Four groups of transverse steel bars 11 are arranged at intervals inside the prefabricated cross beam 1, four first vertical steel bars 21 are arranged inside the prefabricated upper column 2, and four second vertical steel bars 31 are arranged inside the prefabricated lower column 3. The first vertical steel bars 21 and the second vertical steel bars 31 are opposite in the vertical direction, and each group of transverse steel bars 11 is provided with two and symmetrically arranged about the corresponding vertical steel bars. The two groups of transverse steel bars 11 on the upper side abut against the first vertical steel bars 21, and the two groups of transverse steel bars 11 on the lower side abut against the second vertical steel bars 31. Staggered steel bars are arranged at the beam-column connection node, so that the strength of the connection node is guaranteed.

[0033] Reference Figure 1 , Figure 2 The prefabricated cross beam 1 is vertically penetrated with a through hole 12, and the transverse steel bar 11 passes through the through hole 12. The through hole 12 is connected to an upper slot 13 and a lower slot 14 on both sides, respectively. The upper slot 13 is for the prefabricated upper column 2 to be inserted, and the lower slot 14 is for the prefabricated lower column 3 to be inserted, so as to facilitate positioning and improve construction efficiency. A slurry outlet groove 22 connected to the through hole 12 is provided on the side of the prefabricated upper column 2 close to the prefabricated cross beam 1, and slurry outlet holes 23 connected to the slurry outlet groove 22 are provided on the four side walls of the prefabricated upper column 2. A slurry inlet groove 32 connected to the through hole 12 is provided on the side of the prefabricated lower column 3 close to the prefabricated cross beam 1, and a slurry inlet hole 33 connected to the slurry inlet groove 32 is provided on one side wall of the prefabricated lower column 3. The first vertical steel bar 21 and the second vertical steel bar 31 extend into the through hole 12 at the opposite ends.

[0034] After the on-site assembly is completed, grouting material is poured into the grouting holes 33 until the grouting material overflows from each grouting hole 23, completing the cast-in-place construction. The grouting material of the present invention has a large overall flow channel diameter, which is conducive to the flow of the grouting material, thereby improving the density of the grouting material and ensuring the comprehensive strength of the beam-column connection structure.

[0035] Reference Figure 2 , Figure 3In order to increase the injection pressure and further improve the injection density, the inner wall of the slurry outlet hole 23 is fixedly connected with a connecting pipe 6, which is made of metal and is connected with a pressure valve 5. The pressure valve 5 includes a valve body 51, one end of which is threadedly connected to the inner side of the connecting pipe 6, and the other end is threadedly connected with a valve cover 52. The inner cavity of the valve body 51 is connected with the slurry outlet hole 23, and a piston 53 is slidably connected inside the valve body 51. The piston 53 is opposite to the slurry outlet hole 23, and the piston 53 can move along the valve body 51 close to or away from the slurry outlet hole 23. A spring 54 is abutted between the piston 53 and the valve cover 52, and the spring 54 applies a thrust to the piston 53. The side wall of the valve body 51 is provided with an air outlet hole 511 and a liquid outlet hole 512. The liquid outlet hole 512 is located on the side of the air outlet hole 511 away from the slurry outlet hole 23. The diameter of the air outlet hole 511 is smaller than that of the liquid outlet hole 512, and the grouting material is difficult to flow out from the air outlet hole 511. In the initial state, the piston 53 is located at a side of the air outlet 511 close to the pulp outlet 23 .

[0036] The pressure valve 5 blocks the slurry outlet 23. When the grouting material is injected, the air inside first pushes the piston 53 to move until the air outlet 511 is exposed and the air is discharged to prevent the solidified grouting material from having air holes. When the grouting material is full to the slurry outlet 23, it is difficult for the grouting material to flow out from the air outlet 511, and the pressure is further increased to improve the density of the injection. As the pressure increases, the piston 53 continues to move until the liquid outlet 512 is exposed. When the grouting material flows out of the liquid outlet 512, it indicates that the injection is completed. At this time, unscrew the pressure valve 5, and use a wooden plug to block the slurry outlet 23 and the slurry inlet 33, and wait for the grouting material to solidify.

[0037] Reference Figure 2 , Figure 4 A connector 4 is connected between the first vertical steel bar 21 and the second vertical steel bar 31. The connector 4 can prevent the steel bars from tilting when pouring slurry, and improve the connection tightness between the first vertical steel bar 21 and the second vertical steel bar 31 to ensure the structural strength.

[0038] Reference Figure 4 , Figure 5 The connector 4 includes two symmetrically arranged half cylinders 41, the lower ends of the two half cylinders 41 are plugged in, and the outer sides of the upper ends are threadedly sleeved with a fastening ring 42. An upper connecting cavity 43 for inserting the first vertical steel bar 21 is formed between the upper ends of the two half cylinders 41, and a lower connecting cavity 44 for inserting the second vertical steel bar 31 is formed between the lower ends. The two half cylinders 41 are each provided with a groove 411 for inserting the transverse steel bar 11 located at the lower side, and the groove 411 is connected to the lower connecting cavity 44.

[0039] Reference Figure 4 , Figure 5The upper end of the semi-cylinder 41 is provided with a fastening hole 412 connected to the upper connecting cavity 43, and a fastening block 46 is slidably provided inside the fastening hole 412. An inclined surface 461 is provided on the upper side of the end of the fastening block 46 close to the first vertical steel bar 21, so as to facilitate the first vertical steel bar 21 to be inserted into the upper connecting cavity 43. A pressure plate 47 is fixedly connected to the end of the fastening block 46 away from the first vertical steel bar 21, and the outer area of ​​the pressure plate 47 is larger than the fastening block 46, so as to facilitate the fastening block 46 to move under the action of the injection pressure. An annular groove 211 is provided on the outer side of the first vertical steel bar 21 for the fastening block 46 to be inserted, and a limiting groove 413 connected to the fastening hole 412 is provided on the outer wall of the semi-cylinder 41, and the limiting groove 413 is provided for the pressure plate 47 to be inserted. When the pressure plate 47 is pressed against the bottom wall of the limiting groove 413, the fastening block 46 is inserted into the annular groove 211.

[0040] When the grouting material is poured, the fastening block 46 is pressed and moves close to the first vertical steel bar 21 until the fastening block 46 is inserted into the annular groove 211 , thereby improving the connection tightness between the first vertical steel bar 21 and the connecting member 4 .

[0041] Reference Figure 5 , Figure 6 The inner wall of the lower connecting cavity 44 is provided with a liquid guiding groove 45, which is arranged vertically and the upper end of which is connected to the groove 411, and the lower end of which penetrates to the lower end surface of the half cylinder 41. The liquid guiding groove 45 is used for the circulation of slurry, further improving the comprehensive strength of the beam-column connection structure. The lower ends of the two half cylinders 41 are respectively provided with a plug rod 414 and a plug hole 415, the plug rod 414 is fixedly connected to the half cylinder 41, and the plug rod 414 is inserted into the corresponding plug hole 415.

[0042] It should be noted that after the prefabricated cross beam 1 and the prefabricated lower column 3 are assembled, the connector 4 needs to be installed inside the through hole 12, and then the prefabricated upper column 2 is assembled. The installation method is: the two half cylinders 41 are respectively placed on both sides of the second vertical steel bar 31, and the transverse steel bar 11 is inserted into the groove 411, the insertion rod 414 is inserted into the insertion hole 415, and then the fastening ring 42 is screwed until the fastening ring 42 is located at the lower side of the pressure plate 47.

[0043] A construction method for an assembled beam-column connection structure comprises the following steps: S1, prefabricated cross beams 1, prefabricated upper columns 2 and prefabricated lower columns 3 are manufactured in the factory in advance and then transported to the construction site; S2, placing the prefabricated cross beam 1 on the upper side of the prefabricated lower column 3, inserting the prefabricated lower column 3 into the lower slot 14, passing the second vertical reinforcement 31 through the lower transverse reinforcement 11, and then installing the connector 4 accordingly, then placing the prefabricated upper column 2 on the upper side of the prefabricated cross beam 1, inserting the prefabricated upper column 2 into the upper slot 13, passing the first vertical reinforcement 21 through the upper transverse reinforcement 11 and inserting the connector 4; S3, inject grouting material into the grouting hole 33 to fill the through hole 12, wait for the grouting material to solidify, and complete the construction.

[0044] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled beam-column connection structure, comprising a prefabricated crossbeam (1), a prefabricated upper column (2) and a prefabricated lower column (3), characterized in that: The prefabricated cross beam (1) is provided with a through hole (12) running through it in the vertical direction, a transverse steel bar (11) is provided inside the prefabricated cross beam (1), the transverse steel bar (11) passes through the through hole (12), and an upper slot (13) and a lower slot (14) are respectively connected on both sides of the through hole (12), the upper slot (13) is for the prefabricated upper column (2) to be inserted, and the lower slot (14) is for the prefabricated lower column (3) to be inserted; A first vertical steel bar (21) is arranged inside the prefabricated upper column (2); a slurry outlet groove (22) connected to the through hole (12) is arranged on one side of the prefabricated upper column (2) close to the prefabricated cross beam (1); and a slurry outlet hole (23) is connected to one side of the slurry outlet groove (22); A second vertical steel bar (31) is arranged inside the prefabricated lower column (3); a grouting groove (32) connected to the through hole (12) is arranged on one side of the prefabricated lower column (3) close to the prefabricated cross beam (1); one side of the grouting groove (32) is connected to a grouting hole (33); and the first vertical steel bar (21) and the second vertical steel bar (31) both extend into the through hole (12) at their facing ends.

2. The assembled beam-column connection structure according to claim 1, characterized in that: A connecting piece (4) is connected between the first vertical steel bar (21) and the second vertical steel bar (31), and the connecting piece (4) comprises two symmetrically arranged half cylinders (41), the lower ends of the two half cylinders (41) are plugged in, and a fastening ring (42) is threadedly sleeved on the outer sides of the upper ends, and an upper connecting cavity (43) for inserting the first vertical steel bar (21) and a lower connecting cavity (44) for inserting the second vertical steel bar (31) are formed between the two half cylinders (41).

3. The assembled beam-column connection structure according to claim 2, characterized in that: The two half cylinders (41) are each provided with a groove (411) for inserting the transverse steel bar (11) on one side facing each other, and the groove (411) is communicated with the lower connecting cavity (44).

4. The assembled beam-column connection structure according to claim 3 is characterized in that: The inner wall of the lower connecting cavity (44) is provided with a liquid conducting groove (45), and the liquid conducting groove (45) is communicated with the groove (411).

5. The assembled beam-column connection structure according to claim 2, characterized in that: A fastening hole (412) communicating with the upper connecting cavity (43) is provided through the upper end of the half cylinder (41), a fastening block (46) is slidably provided inside the fastening hole (412), and an annular groove (211) for inserting the fastening block (46) is provided on the outer side of the first vertical steel bar (21).

6. The assembled beam-column connection structure according to claim 5, characterized in that: The fastening block (46) is provided with an inclined surface (461) on the upper side of one end close to the first vertical steel bar (21), and the other end is fixedly connected to a pressure plate (47). The outer wall of the semi-cylinder (41) is provided with a limiting groove (413) connected to the fastening hole (412), and the limiting groove (413) is for the pressure plate (47) to be inserted.

7. The assembled beam-column connection structure according to claim 2, characterized in that: The lower ends of the two half cylinders (41) are respectively provided with an insertion rod (414) and an insertion hole (415), and the insertion rod (414) is inserted into the corresponding insertion hole (415).

8. The assembled beam-column connection structure according to claim 1, characterized in that: A pressure valve (5) is provided at the slurry outlet hole (23), and the pressure valve (5) comprises a valve body (51), a valve cover (52) connected to the valve body (51), a piston (53) arranged inside the valve body (51), and a spring (54) arranged between the valve cover (52) and the piston (53); the inner cavity of the valve body (51) is communicated with the slurry outlet hole (23); the piston (53) is directly opposite to the slurry outlet hole (23); and the side wall of the valve body (51) is provided with an air outlet hole (511) and a liquid outlet hole (512); the liquid outlet hole (512) is located on a side of the air outlet hole (511) away from the slurry outlet hole (23).

9. The assembled beam-column connection structure according to claim 8, characterized in that: The inner wall of the slurry outlet hole (23) is provided with a connecting pipe (6), and the connecting pipe (6) is threadedly connected to the valve body (51).

10. A construction method for the assembled beam-column connection structure according to any one of claims 1 to 9, characterized in that: The steps include: S1, prefabricated cross beams (1), prefabricated upper columns (2) and prefabricated lower columns (3) are manufactured in a factory in advance and then transported to the construction site; S2, placing the prefabricated cross beam (1) on the upper side of the prefabricated lower column (3), and inserting the prefabricated lower column (3) into the lower slot (14), and then placing the prefabricated upper column (2) on the upper side of the prefabricated cross beam (1), and inserting the prefabricated upper column (2) into the upper slot (13); S3, inject grouting material into the grouting hole (33) to fill the through hole (12), wait for the grouting material to solidify, and complete the construction.

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