An assembled beam-column connection structure and construction method

Abstract

The present invention relates to the field of building construction, and specifically discloses an assembled beam-column connection structure and a construction method. The assembled beam-column connection structure includes a precast cross beam, a precast upper column, and a precast lower column. A through hole is vertically provided in the precast cross beam, and transverse steel bars are arranged inside the precast cross beam. The transverse steel bars pass through the through hole. An upper slot and a lower slot are respectively communicated on both sides of the through hole. The upper slot is for the precast upper column to be inserted, and the lower slot is for the precast lower column to be inserted. A first vertical steel bar is arranged inside the precast upper column. On one side of the precast upper column close to the precast cross beam, there is a grout outlet groove communicated with the through hole, and a grout outlet hole is communicated on one side of the grout outlet groove. A second vertical steel bar is arranged inside the precast lower column. On one side of the precast lower column close to the precast cross beam, there is a grout inlet groove communicated with the through hole, and a grout inlet hole is communicated on one side of the grout inlet groove. The large diameter of the through hole is beneficial to the flow of the grouting material, thereby improving the compactness of the grouting material and ensuring the comprehensive strength of the beam-column connection structure.

Description

Technical Field

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

[0002] Prefabricated buildings are a type of building form promoted by the construction industry to achieve green, environmental protection, and sustainable development. They have the advantages of fast construction speed, less on-site operation, less influence by seasons, and stable quality. Currently, the construction method of prefabricated buildings is usually as follows: First, precast concrete components or steel components are fabricated in the factory and then directly assembled on the construction site after being transported. Compared with the traditional cast-in-place construction method, the construction time is short and the construction efficiency is high.

[0003] Chinese Patent No. CN113431410A discloses a prefabricated beam-column connection structure with sleeve grouting connection, including: a precast beam, including a core structure area provided with through holes, a sleeve is installed in the through holes, and the core structure area is integrally precast with the precast beam; a precast lower column, arranged on the first side of the core structure area; a precast upper column, arranged on the second side of the core structure area; anchoring steel bars are arranged at the ends of the precast lower column and the precast upper column close to the core structure area, and the anchoring steel bars are inserted into the sleeve, and the sleeve and the anchoring steel bars are connected by grouting material through condensation.

[0004] The beam-column connection structure disclosed in the above patent combines the advantages of factory prefabrication and cast-in-place construction, improves the integrity of the connection node, and further improves the comprehensive strength of the core structure area, with 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 compactness of the grouting material, and further affecting the comprehensive strength of the core structure area. Summary of the Invention

[0005] In order to facilitate the flow and compaction of the grouting material for pouring, the present invention provides a prefabricated beam-column connection structure and a construction method thereof.

[0006] In the first aspect, a prefabricated beam-column connection structure provided by the present invention adopts the following technical solution:

[0007] A prefabricated beam-column connection structure includes a precast cross beam, a precast upper column, and a precast lower column. The precast cross beam is vertically provided with through holes, and transverse steel bars are arranged inside the precast cross beam. The transverse steel bars pass through the through holes. Upper slots and lower slots are respectively communicated on both sides of the through holes. The upper slots are for inserting the precast upper column, and the lower slots are for inserting the precast lower column;

[0008] The precast upper column is internally provided with first vertical steel bars, and a slurry outlet groove communicated with the through hole is arranged on one side of the precast upper column close to the precast cross beam, and a slurry outlet hole is communicated on one side of the slurry outlet groove;

[0009] The interior of the precast lower column is provided with second vertical steel bars. One side of the precast lower column close to the precast cross beam is provided with a grout inlet groove communicated with the through hole. One side of the grout inlet groove is communicated with a grout inlet hole. Opposite ends of the first vertical steel bar and the second vertical steel bar both extend into the through hole.

[0010] By adopting the above technical solutions, first, the large diameter of the through hole is beneficial to the flow of the grouting material, thereby improving the compactness of the grouting material and ensuring the comprehensive strength of the beam-column connection structure; second, the components are prefabricated in the factory, and the on-site assembly construction steps are few, and the construction efficiency is high; third, the horizontal steel bars and the vertical steel bars are uniformly arranged at the beam-column connection structure, and the structural strength is high.

[0011] Optionally, a connecting piece is connected between the first vertical steel bar and the second vertical steel bar. The connecting piece includes two symmetrically arranged semi-cylinders. The lower ends of the two semi-cylinders are inserted, and a fastening ring is commonly threadedly sleeved on the outer sides of the upper ends. 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 semi-cylinders.

[0012] By adopting the above technical solutions, the first vertical steel bar and the second vertical steel bar are connected by the connecting piece, so that the longitudinal tensile strength is improved, and the vertical steel bars are not easily skewed when the grouting material is poured, thereby ensuring the structural strength.

[0013] Optionally, grooves for inserting horizontal steel bars are arranged on opposite sides of the two semi-cylinders, and the grooves are communicated with the lower connecting cavity.

[0014] By adopting the above technical solutions, first, a connection is formed between the horizontal steel bars and the vertical steel bars; second, the grooves can supply the grout to enter the connecting piece, thereby being beneficial to improving the comprehensive strength of the beam-column connection structure.

[0015] Optionally, a liquid guide groove is arranged on the inner wall of the lower connecting cavity, and the liquid guide groove is communicated with the groove.

[0016] By adopting the above technical solutions, the liquid guide groove allows the grout to flow through, further improving the comprehensive strength of the beam-column connection structure.

[0017] Optionally, a fastening hole communicated with the upper connecting cavity is arranged through the upper end of the semi-cylinder. A fastening block is slidably arranged inside the fastening hole. An annular groove for inserting the fastening block is arranged on the outer side of the first vertical steel bar.

[0018] By adopting the above technical solutions, when the grouting material is poured, the fastening block is pressed 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.

[0019] 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-receiving plate is fixedly connected to the other end. A limiting groove communicating with the fastening hole is provided on the outer wall of the semi-cylinder, and the pressure-receiving plate is inserted into the limiting groove.

[0020] By adopting the above technical solutions, firstly, it is convenient for the first vertical steel bar to be inserted into the upper connection cavity, and secondly, it is convenient for the fastening block to move under the action of the perfusion pressure.

[0021] Optionally, insertion rods and insertion holes are respectively provided at the lower ends of the two semi-cylinders, and the insertion rods are inserted into the corresponding insertion holes.

[0022] By adopting the above technical solutions, the installation is convenient. The two semi-cylinders are inserted into each other in opposite directions, and then the fastening ring is screwed.

[0023] Optionally, a pressure valve is provided at the slurry outlet hole. The pressure valve includes a valve body, a valve cover connected to the valve body, a piston disposed inside the valve body, and a spring disposed between the valve cover and the piston. The inner cavity of the valve body communicates with the slurry outlet hole. The piston faces the slurry outlet hole. An air outlet hole and a liquid outlet hole are provided on the side wall of the valve body, and the liquid outlet hole is located on the side of the air outlet hole away from the slurry outlet hole.

[0024] By adopting the above technical solutions, blocking the slurry outlet hole is beneficial to increasing the perfusion pressure. When pouring the 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 fills up to the slurry outlet hole, it is difficult for the grouting material to flow out from the air outlet hole, the pressure further increases, and the piston is pushed to continue moving until the liquid outlet hole is exposed. When the grouting material flows out from the liquid outlet hole, it indicates that the perfusion is completed.

[0025] 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.

[0026] By adopting the above technical solutions, the pressure valve is easy to disassemble and assemble and can be reused many times.

[0027] In the second aspect, a construction method of an assembled beam-column connection structure provided by the present invention adopts the following technical solutions:

[0028] A construction method of an assembled beam-column connection structure includes the following steps:

[0029] S1, prefabricate a precast cross beam, a precast upper column and a precast lower column in a factory in advance, and then transport them to the construction site;

[0030] S2, place the precast cross beam on the upper side of the precast lower column, insert the precast lower column into the lower slot, then place the precast upper column on the upper side of the precast cross beam, and insert the precast upper column into the upper slot;

[0031] S3, inject grouting material into the grout inlet hole to fill the through hole, and wait for the grouting material to solidify to complete the construction.

[0032] By adopting the above technical solution, the construction efficiency is high and the construction period is short.

[0033] In summary, the present invention has the following beneficial effects:

[0034] 1. The through-hole has a large diameter, which is beneficial to the flow of the grouting material, thereby improving the compactness of the grouting material and ensuring the comprehensive strength of the beam-column connection structure;

[0035] 2. The components are prefabricated in the factory, and the on-site assembly construction steps are few, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the prefabricated beam-column connection structure according to an embodiment of the present invention;

[0037] Figure 2 is a schematic cross-sectional view of the prefabricated beam-column connection structure according to an embodiment of the present invention;

[0038] Figure 3 is Figure 2 an enlarged schematic view of area A in

[0039] Figure 4 is a schematic structural diagram of the transverse steel bar, the first vertical steel bar, the second vertical steel bar and the connecting piece according to an embodiment of the present invention;

[0040] Figure 5 is a schematic cross-sectional view of the connecting piece according to an embodiment of the present invention;

[0041] Figure 6 is an exploded schematic view of the connecting piece according to an embodiment of the present invention.

[0042] Description of the reference numerals: 1, precast cross beam; 11, transverse steel bar; 12, through hole; 13, upper slot; 14, lower slot; 2, precast upper column; 21, first vertical steel bar; 211, annular groove; 22, grout outlet groove; 23, grout outlet hole; 3, precast lower column; 31, second vertical steel bar; 32, grout inlet groove; 33, grout inlet hole; 4, connecting piece; 41, half cylinder; 411, groove; 412, fastening hole; 413, limiting groove; 414, inserting rod; 415, inserting hole; 42, fastening ring; 43, upper connecting cavity; 44, lower connecting cavity; 45, liquid guiding groove; 46, fastening block; 461, inclined surface; 47, pressure receiving plate; 5, pressure valve; 51, valve body; 511, air outlet hole; 512, liquid outlet hole; 52, valve cover; 53, piston; 54, spring; 6, connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The following is a further detailed description of the present invention with reference to the attached Figures 1-6 drawings.

[0044] An embodiment of the present invention discloses an assembled beam-column connection structure and a construction method.

[0045] Referring to Figure 1 , the assembled beam-column connection structure includes a precast cross beam 1, and a precast upper column 2 and a precast lower column 3 are respectively inserted on the upper and lower sides of the precast cross beam 1. The precast cross beam 1, the precast upper column 2 and the precast lower column 3 are all reinforced concrete structures, which are produced by factories. The on-site assembly construction steps are few and the construction efficiency is high.

[0046] Referring to Figure 1 、 Figure 2 , four groups of transverse steel bars 11 are arranged at intervals inside the precast cross beam 1, four first vertical steel bars 21 are arranged inside the precast upper column 2, and four second vertical steel bars 31 are arranged inside the precast lower column 3. The first vertical steel bars 21 and the second vertical steel bars 31 are opposite in position in the vertical direction. Each group of transverse steel bars 11 has two and is symmetrically arranged with respect to the corresponding vertical steel bar. The two groups of transverse steel bars 11 located on the upper side abut against the first vertical steel bars 21, and the two groups of transverse steel bars 11 located on the lower side abut against the second vertical steel bars 31. Staggered steel bars are arranged at the beam-column connection node, so as to ensure the strength of the connection node.

[0047] Referring to Figure 1 、 Figure 2 , a through hole 12 is vertically penetrated through the precast cross beam 1, and the transverse steel bars 11 pass through the through hole 12. An upper slot 13 and a lower slot 14 are respectively communicated on both sides of the through hole 12. The upper slot 13 is for inserting the precast upper column 2, and the lower slot 14 is for inserting the precast lower column 3, so as to facilitate positioning and improve construction efficiency. A slurry outlet groove 22 communicated with the through hole 12 is arranged on one side of the precast upper column 2 close to the precast cross beam 1, and slurry outlet holes 23 communicated with the slurry outlet groove 22 are arranged on four side walls of the precast upper column 2. A slurry inlet groove 32 communicated with the through hole 12 is arranged on one side of the precast lower column 3 close to the precast cross beam 1, and a slurry inlet hole 33 communicated with the slurry inlet groove 32 is arranged on one side wall of the precast lower column 3. The opposite ends of the first vertical steel bars 21 and the second vertical steel bars 31 both extend into the through hole 12.

[0048] After the on-site assembly is completed, grouting material is poured into the grouting hole 33 until the grouting material overflows from each grouting hole 23, and the cast-in-place construction is completed. The overall flow channel diameter of the grouting material of the present invention is large, which is beneficial to the flow of the grouting material, thereby improving the compactness of the grouting material and ensuring the comprehensive strength of the beam-column connection structure.

[0049] Referring to Figure 2 、 Figure 3, in order to increase the perfusion pressure to further improve the perfusion compactness, a connecting pipe 6 is fixedly connected to the inner wall of the slurry outlet hole 23. The connecting pipe 6 is made of metal, and the connecting pipe 6 is connected with a pressure valve 5. The pressure valve 5 includes a valve body 51. One end of the valve body 51 is threadedly connected to the inside 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 communicates with the slurry outlet hole 23. A piston 53 is slidably connected inside the valve body 51. The piston 53 faces the slurry outlet hole 23, and the piston 53 can move along the valve body 51 closer 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 exerts a thrust on the piston 53. An air outlet hole 511 and a liquid outlet hole 512 are provided on the side wall of the valve body 51. 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 it is difficult for the grouting material to flow out from the air outlet hole 511. In the initial state, the piston 53 is located on the side of the air outlet hole 511 close to the slurry outlet hole 23.

[0050] The pressure valve 5 seals the slurry outlet hole 23. When injecting the grouting material, the air inside first pushes the piston 53 to move until the air outlet hole 511 is exposed and the air is discharged to prevent air holes from appearing in the solidified grouting material. When the grouting material fills up to the slurry outlet hole 23, it is difficult for the grouting material to flow out from the air outlet hole 511, and the pressure further increases to improve the perfusion compactness. As the pressure increases, the piston 53 continues to move until the liquid outlet hole 512 is exposed. When the grouting material flows out from the liquid outlet hole 512, it indicates that the perfusion is completed. At this time, unscrew the pressure valve 5 and use a wooden plug to seal the slurry outlet hole 23 and the slurry inlet hole 33, and wait for the grouting material to solidify.

[0051] Refer to Figure 2 , Figure 4 , a connecting member 4 is connected between the first vertical steel bar 21 and the second vertical steel bar 31. On the one hand, the connecting member 4 can prevent the steel bars from skewing when injecting the grouting slurry, and on the other hand, it can improve the connection tightness between the first vertical steel bar 21 and the second vertical steel bar 31 and ensure the structural strength.

[0052] Refer to Figure 4 , Figure 5 , the connecting member 4 includes two symmetrically arranged semi-cylinders 41. The lower ends of the two semi-cylinders 41 are inserted, and a fastening ring 42 is commonly threadedly sleeved on the outer sides of the upper ends. An upper connection cavity 43 for inserting the first vertical steel bar 21 is formed between the upper ends of the two semi-cylinders 41, and a lower connection cavity 44 for inserting the second vertical steel bar 31 is formed between the lower ends. Grooves 411 for inserting the horizontal steel bar 11 located on the lower side are provided on one side of the two semi-cylinders 41 facing each other, and the grooves 411 communicate with the lower connection cavity 44.

[0053] Refer to Figure 4 , Figure 5, a fastening hole 412 communicating with the upper connection cavity 43 is provided through the upper end of the semi-cylinder 41, and a fastening block 46 is slidably arranged inside the fastening hole 412. An inclined surface 461 is provided on the upper side of one end of the fastening block 46 close to the first vertical steel bar 21 to facilitate the insertion of the first vertical steel bar 21 into the upper connection cavity 43. A pressure-receiving plate 47 is fixedly connected to the end of the fastening block 46 far from the first vertical steel bar 21, and the outer area of the pressure-receiving plate 47 is larger than that of the fastening block 46 to facilitate the movement of the fastening block 46 under the action of the pouring pressure. An annular groove 211 for the insertion of the fastening block 46 is provided on the outer side of the first vertical steel bar 21, and a limiting groove 413 communicating with the fastening hole 412 is provided on the outer wall of the semi-cylinder 41. The limiting groove 413 is for the insertion of the pressure-receiving plate 47, and when the pressure-receiving plate 47 abuts against the bottom wall of the limiting groove 413, the fastening block 46 is inserted into the annular groove 211.

[0054] When pouring grout, the fastening block 46 is pressed and moves closer 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 connector 4.

[0055] Refer to Figure 5 , Figure 6 , a liquid guide groove 45 is provided on the inner wall of the lower connection cavity 44. The liquid guide groove 45 is vertically arranged, with its upper end communicating with the groove 411 and its lower end penetrating to the lower end face of the semi-cylinder 41. The liquid guide groove 45 allows the slurry to flow through, further improving the comprehensive strength of the beam-column connection structure. Insertion rods 414 and insertion holes 415 are respectively provided at the lower ends of the two semi-cylinders 41. The insertion rod 414 is fixedly connected to the semi-cylinder 41, and the insertion rod 414 is inserted into the corresponding insertion hole 415.

[0056] It should be noted that after the precast cross beam 1 and the precast lower column 3 are assembled, the connector 4 needs to be installed inside the through hole 12, and then the precast upper column 2 is assembled. The installation method is as follows: The two semi-cylinders 41 are respectively sleeved on both sides of the second vertical steel bar 31, 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 below the pressure-receiving plate 47.

[0057] A construction method for an assembled beam-column connection structure includes the following steps:

[0058] S1, prefabricate the precast cross beam 1, the precast upper column 2 and the precast lower column 3 in the factory in advance, and then transport them to the construction site;

[0059] S2, place the precast cross beam 1 on the upper side of the precast lower column 3, insert the precast lower column 3 into the lower insertion slot 14, let the second vertical steel bar 31 pass through the lower transverse steel bar 11, then install the connector 4 correspondingly, then place the precast upper column 2 on the upper side of the precast cross beam 1, insert the precast upper column 2 into the upper insertion slot 13, and let the first vertical steel bar 21 pass through the upper transverse steel bar 11 and insert it into the connector 4;

[0060] S3. Inject grouting material into the grout inlet hole 33 to fill the through hole 12. Wait for the grouting material to solidify to complete the construction.

[0061] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within 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); the first vertical steel bar (21) and the second vertical steel bar (31) both extend into the through hole (12) at their opposite ends; a connecting piece (4) is connected between the first vertical steel bar (21) and the second vertical steel bar (31); the connecting piece (4) comprises two symmetrically arranged half cylinders (41); the lower ends of the two half cylinders (41) are plugged in; the outer sides of the upper ends are commonly threadedly sleeved with a fastening ring (42); 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); 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); 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.

2. The assembled beam-column connection structure according to claim 1, 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).

3. The assembled beam-column connection structure according to claim 2, 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).

4. The assembled beam-column connection structure according to claim 1, 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).

5. 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); 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).

6. The assembled beam-column connection structure according to claim 5, 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).

7. A construction method for the assembled beam-column connection structure according to any one of claims 1 to 6, 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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