Connecting joint of newly-added beam and existing column and construction method of connecting joint

Abstract

The invention relates to the technical field of building construction, and discloses a newly-added beam and existing column connecting joint and a construction method thereof.The newly-added beam and existing column connecting joint comprises an existing column, a beam and a beam, the connecting rib is arranged in the hole site, and at least part of the connecting rib extends out of the hole site; the annular rib is arranged on the periphery of the existing column and is fixedly connected with the part, extending out of the hole site, of the connecting rib; the newly-added beam longitudinal steel bars are fixedly connected with the annular bars, and concrete can be poured on the newly-added beam longitudinal steel bars to form a newly-added beam; and the concrete layer is formed on the connecting ribs, the annular ribs and the newly-added beam longitudinal steel bars, so that the newly-added beam is formed on the existing column. Only a small number of connecting ribs need to be implanted into the existing column, a large number of holes do not need to be drilled in the existing column, newly-added beam longitudinal steel bars do not need to be implanted into the existing column and are directly inserted into the ring beam to be anchored, the steel bar planting construction difficulty is greatly reduced, and the field workload is reduced; and the drilling quantity of the existing column is reduced, the structural strength of the existing column is ensured, and the construction risk is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a new beam and existing column connecting joint and a construction method thereof. BACKGROUND

[0002] In current building reconstruction projects, when a new frame beam is connected with an existing column, a method of planting a reinforcing bar in the existing column is usually adopted.

[0003] Specifically, a hole needs to be drilled in the existing column, and then a reinforcing bar for the new frame beam is planted in the hole, and finally concrete is poured to complete the connection between the new frame beam and the existing column. In actual construction, a large number of holes need to be drilled in the existing column and a large number of reinforcing bars for the new frame beam need to be planted to ensure the stable connection between the new frame beam and the existing column. Due to the dense reinforcing bars in the existing column, the construction difficulty of planting the reinforcing bar is great, and the on-site workload is large; and a large number of holes drilled in the existing column cause great damage to the existing column, and there are safety hazards in the construction process. SUMMARY

[0004] Therefore, the present application provides a new beam and existing column connecting joint to solve the problems of great construction difficulty, large on-site workload and great damage to the existing column caused by planting the reinforcing bar when connecting the new beam with the existing column. Meanwhile, the present application provides a construction method of the new beam and existing column connecting joint.

[0005] In a first aspect, the present application provides a new beam and existing column connecting joint, comprising:

[0006] an existing column, which is provided with a recessed hole position in the circumferential direction thereof;

[0007] a connecting bar, which is arranged in the hole position, and at least part of the connecting bar extends out of the hole position;

[0008] a ring-shaped bar, which is arranged at the periphery of the existing column and is fixedly connected with the part of the connecting bar extending out of the hole position;

[0009] a new beam longitudinal reinforcing bar, which is fixedly connected with the ring-shaped bar, and concrete can be poured on the new beam longitudinal reinforcing bar to form a new beam;

[0010] a concrete layer, which is formed on the connecting bar, the ring-shaped bar and the new beam longitudinal reinforcing bar, so that the new beam is formed on the existing column.

[0011] Beneficial Effects: This invention provides a connection node between a new beam and an existing column. By setting a few holes and installing a few connecting bars in the existing column, and then fixing ring bars to the connecting bars so that the ring bars are located on the periphery of the existing column, a large number of longitudinal steel bars for the new beam can be directly fixed to the ring bars. The concrete layer is formed on the connecting bars, ring bars, and longitudinal steel bars of the new beam, thus forming the new beam in the existing column. In this way, only a few connecting bars need to be installed in the existing column, eliminating the need for extensive drilling. The longitudinal steel bars of the new beam do not need to be implanted into the existing column; they can be directly inserted into the ring beam for anchoring. This greatly reduces the difficulty of rebar installation and the amount of on-site work. Furthermore, reducing the amount of drilling in the existing column ensures the structural strength of the existing column and reduces construction risks.

[0012] In one alternative embodiment, the existing column has a circumferentially formed groove, which is formed by chiseling inward from at least a portion of the circumference of the existing column to expose the supporting ribs inside the existing column.

[0013] The hole is located in the slot, and the hole avoids the support ribs inside the existing column.

[0014] Beneficial effect: A groove is formed around the existing column to expose the supporting ribs inside the existing column, so that the opening position of the hole can avoid the supporting ribs inside the existing column and avoid the interference of the connecting ribs with the supporting ribs inside the existing column.

[0015] In one optional implementation, multiple holes are provided along the circumference of the existing column;

[0016] And / or, multiple holes are provided along the height direction of the existing column.

[0017] Beneficial effects: Multiple holes are provided along the circumference and height of the existing column for installing connecting bars, thus providing sufficient installation positions for the ring bars.

[0018] In one alternative embodiment, multiple ring-shaped reinforcing bars are provided along a direction away from the existing column;

[0019] And / or, the annular reinforcement is provided in multiple directions along the height of the existing column.

[0020] Beneficial effects: Multiple ring-shaped reinforcement bars are set along the direction away from the existing column and along the height of the existing column. After the multiple ring-shaped reinforcement bars are fixedly connected with the connecting reinforcement bars, a sufficiently large circular ring extension structure is formed, which improves the structural stability of the ring beam formed by the extension structure of the existing column after the concrete is poured. It provides a stable foundation structure for the longitudinal reinforcement of the new beam, so as to facilitate the formation of a stable new beam.

[0021] In one optional embodiment, the connection node between the new beam and the existing column further includes stirrups that are arranged around the periphery of the plurality of annular bars, and the plurality of stirrups are spaced apart circumferentially along the annular bars.

[0022] Beneficial effects: By surrounding multiple ring bars with stirrups, the integrity of the multiple ring bars is improved, further enhancing the structural stability of the extension structure of the existing column after concrete pouring.

[0023] In one optional embodiment, the connection node between the new beam and the existing column also includes multiple through bars, wherein two through bars are located on the same horizontal plane, and one end of the two through bars on the same side passes through the ring bar and avoids the existing column, and the other ends of the two through bars on the same side are arranged crosswise.

[0024] Concrete can be poured onto the other end of the two through bars on the same side and onto the longitudinal reinforcement of the new beam to form the new beam.

[0025] Beneficial effect: Setting multiple through bars and pouring concrete together with the longitudinal reinforcement of the new beam to form the new beam ensures continuous transmission of bending moment at the connection node between the new beam and the existing column.

[0026] In one alternative embodiment, the existing column is configured as a square column, with the innermost annular rib abutting against the edge of the square column.

[0027] Beneficial effect: The innermost ring reinforcement of the existing column, which is set as a square column, abuts against the edge of the square column to ensure the connection stability of the ring reinforcement.

[0028] In one alternative embodiment, a clearance is formed between the outer surface of the square column and the innermost annular rib.

[0029] The connection node between the newly added beam and the existing column also includes filler bars, which are located in the void.

[0030] Beneficial effects: When the existing column is set as a square column, the filling reinforcement is placed in the void to improve the integrity of the internal steel reinforcement structure of the connection node between the new beam and the existing column, and further improve the structural stability of the connection node between the new beam and the existing column.

[0031] In one alternative embodiment, the existing column is configured as a circular column, with the innermost annular rib fitting against the outer surface of the circular column.

[0032] Beneficial effect: The innermost ring-shaped reinforcement of the existing column, which is set as a circular column, fits into the outer surface of the circular column to ensure the connection stability of the ring-shaped reinforcement.

[0033] Secondly, the present invention also provides a construction method for a new beam-existing column connection node, used for constructing the new beam-existing column connection node as described in the above-described embodiments, the construction method comprising:

[0034] The boundary between the new circumferential beam and the existing column is chiseled away to remove the protective layer of the existing column and expose the longitudinal steel bars inside the existing column.

[0035] Holes are made at the chiseling locations of the existing column, and the holes are made to avoid the supporting ribs inside the existing column.

[0036] A connecting rib is provided in the hole, and at least a portion of the connecting rib extends out of the hole;

[0037] A ring-shaped rib is provided around the existing column, and the ring-shaped rib is fixedly connected to the portion of the connecting rib extending out of the hole.

[0038] Add longitudinal reinforcement to the beam by fixing the ring reinforcement;

[0039] Concrete is poured onto the connecting bars and the annular bars to form a ring beam;

[0040] The new beam is formed by pouring concrete onto the longitudinal reinforcement bars of the new beam. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 A transverse sectional view of a newly added beam-existing column connection node provided by the present invention;

[0043] Figure 2 This is a vertical sectional view of a newly added beam and an existing column connection node provided by the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Existing column; 2. Connecting reinforcement; 3. Ring reinforcement; 4. Longitudinal reinforcement of new beam; 5. New beam; 6. Concrete layer; 7. Trench; 8. Stirrup; 9. Through reinforcement; 10. Void; 11. Filler reinforcement; 12. Additional long reinforcement; 13. Additional short reinforcement. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] The following is combined Figure 1 , Figure 2 The following describes embodiments of the present invention.

[0051] According to an embodiment of the present invention, in one aspect, a new beam-existing column connection node is provided, such as... Figure 1 , Figure 2 As shown, it includes: existing column 1, connecting reinforcement 2, ring reinforcement 3, new longitudinal reinforcement of beam 4, and concrete layer 6.

[0052] The existing column 1 has recessed holes along its circumference; connecting bars 2 are located in the holes, with at least a portion of the connecting bars 2 extending out of the holes; ring bars 3 are located around the existing column 1 and are fixedly connected to the portion of the connecting bars 2 extending out of the holes; the longitudinal reinforcement 4 of the new beam is fixedly connected to the ring bars 3, and concrete can be poured on the longitudinal reinforcement 4 of the new beam to form the new beam 5; a concrete layer 6 is formed on the connecting bars 2, the ring bars 3, and the longitudinal reinforcement 4 of the new beam, so that the new beam 5 is formed on the existing column 1.

[0053] In the above embodiment, by setting a small number of holes and installing a small number of connecting bars 2 in the existing column 1, and then fixing the connecting bars 2 to the ring bars 3 so that the ring bars 3 are located on the periphery of the existing column 1, a large number of new longitudinal steel bars 4 for forming the new beam 5 can be directly fixed to the ring bars 3. The concrete layer 6 is formed on the connecting bars 2, the ring bars 3, and the new longitudinal steel bars 4, so that the new beam 5 can be formed in the existing column 1. In this way, only a small number of connecting bars 2 need to be installed in the existing column 1, without the need to drill a large number of holes in the existing column 1. The new longitudinal steel bars 4 do not need to be implanted into the existing column 1, but can be directly inserted into the ring beam for anchoring, which greatly reduces the difficulty of rebar installation and the amount of on-site work; and reducing the amount of drilling in the existing column 1 can ensure the structural strength of the existing column 1 and reduce the construction risk.

[0054] Specifically, such as Figure 1 , Figure 2 As shown, holes are drilled in the existing column 1 and a small number of connecting bars 2 are installed. Then, ring bars 3 are fixedly connected to the connecting bars 2 so that the ring bars 3 are located on the periphery of the existing column 1, forming a circular extension structure on the periphery of the existing column 1. A large number of the longitudinal steel bars 4 of the new beam are directly fixed and connected to the extension structure, i.e., the ring bars 3. In this way, when pouring concrete, concrete is first poured on the part of the structure protruding from the holes in the small number of connecting bars 2 and the extension structure formed by the ring bars 3. The extension structure after pouring concrete forms a ring beam as a stable foundation for the longitudinal steel bars 4 of the new beam. Then, concrete is poured on the longitudinal steel bars 4 of the new beam, and the longitudinal steel bars 4 of the new beam after pouring concrete can form the new beam 5. Thus, the new beam 5 is formed on the existing column 1 to form a connection node between the new beam and the existing column. At the same time, compared with the hinged structure of the new beam and the existing column, the connection node between the new beam and the existing column provided in this embodiment has a smaller beam height, which can maximize the contribution of the net height.

[0055] Furthermore, such as Figure 1 , Figure 2 As shown, holes of appropriate depth are made in the existing column 1, such that the depth of the anchoring part of the connecting bar 2 extending into the hole is 10 to 12 times the diameter of the connecting bar 2 itself, and the length of the exposed part of the connecting bar 2 extending out of the hole is 18 to 22 times the diameter of the connecting bar 2 itself.

[0056] Furthermore, to ensure the continuous transfer of bending moment at the connection node between the new beam and the existing column, the reinforcement amount of the ring reinforcement 3 is not less than 70% of the reinforcement amount at the beam end of the existing column 1 connected to it. This also ensures that the total reinforcement amount on both sides of the ring beam corresponding to the ring reinforcement 3 is not less than 1.4 times the reinforcement amount at the beam end of the new beam 5.

[0057] In some embodiments, such as Figure 1 , Figure 2 As shown, a groove 7 is formed in the circumference of the existing column 1. The groove 7 is formed by chiseling inward from at least a portion of the circumference of the existing column 1 to expose the supporting ribs inside the existing column 1. Holes are provided in the groove 7, and the holes avoid the supporting ribs inside the existing column 1.

[0058] In the above embodiment, a groove 7 is formed by chiseling around the existing column 1 to expose the supporting ribs inside the existing column 1, so that the opening position of the hole avoids the supporting ribs inside the existing column 1, and avoids interference between the connecting rib 2 and the supporting ribs inside the existing column 1.

[0059] Specifically, such as Figure 1 , Figure 2 As shown, the existing column 1 at the connection node is roughened and chiseled, and the grooves 7 are required to be 100mm wide, 100mm apart and 10mm deep, so as to form shear keys, which can ensure the shear force transmission of the ring beam node and improve the stability of the connection node between the new beam and the existing column.

[0060] Furthermore, this embodiment does not restrict the location of the groove 7 formed by circumferential chiseling of the existing column 1.

[0061] As one implementation method, a groove 7 is formed by chiseling out a portion of the existing column 1 around its perimeter to expose the supporting ribs inside the existing column 1, which is suitable for constructing one or two small number of new beams 5.

[0062] As another implementation, a groove 7 is formed by chiseling out the entire circumference of the existing column 1 to expose the supporting ribs inside the existing column 1, which is suitable for constructing four or more new beams 5.

[0063] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple holes are provided along the circumference of the existing column 1; and / or, multiple holes are provided along the height of the existing column 1.

[0064] In the above embodiment, multiple holes are provided along the circumference and height of the existing column 1 for installing the connecting rib 2, thereby providing sufficient installation positions for the ring rib 3.

[0065] Specifically, such as Figure 1 , Figure 2As shown, in this embodiment, the holes are arranged in four layers along the height direction of the existing column 1, with sixteen holes in each layer along the entire circumference of the existing column 1, for a total of sixty-four holes, which can be used to install sixty-four connecting bars 2. Of course, as other implementation methods, during construction, more or fewer holes can be arranged along the circumference of the existing column 1, or more or fewer holes can be arranged along the height direction of the existing column 1, depending on actual needs.

[0066] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple annular reinforcing bars 3 are provided along the direction away from the existing column 1; and / or, multiple annular reinforcing bars 3 are provided along the height direction of the existing column 1.

[0067] In the above embodiment, multiple annular reinforcement bars 3 are arranged along the direction away from the existing column 1 and along the height direction of the existing column 1. After the multiple annular reinforcement bars 3 are fixedly connected with the connecting reinforcement bars 2, a sufficiently large annular extension structure is formed, which improves the structural stability of the ring beam formed by the extension structure of the existing column 1 after the concrete is poured, and provides a stable foundation structure for the longitudinal reinforcement bars 4 of the new beam, so as to facilitate the formation of a stable new beam 5.

[0068] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, the annular reinforcement 3 is arranged in five layers along the height direction of the existing column 1, and each layer has four annular reinforcement 3 with increasing radii in the direction away from the existing column 1, that is, a total of twenty annular reinforcement 3. Of course, as other implementation methods, in construction, according to actual needs, more or fewer annular reinforcement 3 can be arranged along the direction away from the existing column 1, and more or fewer annular reinforcement 3 can be arranged along the height direction of the existing column 1.

[0069] In some embodiments, such as Figure 1 , Figure 2 As shown, the connection node between the newly added beam and the existing column also includes stirrups 8 that are wrapped around the periphery of multiple ring bars 3, and the multiple stirrups 8 are spaced apart along the circumference of the ring bars 3.

[0070] In the above embodiment, stirrups 8 are provided around the multiple annular bars 3 to improve the integrity of the multiple annular bars 3 and further improve the structural stability of the extension structure of the existing column 1 after the concrete is poured.

[0071] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, multiple annular ribs 3 are arranged along the direction away from the existing column 1 and along the height direction of the existing column 1. The multiple annular ribs 3 are integrally formed into a hollow cylinder. The stirrups 8 are wrapped around the periphery of the multiple annular ribs 3, that is, wrapped around the entire circumference of the side wall of the hollow cylinder. The multiple annular ribs 3 are wrapped in this way to improve the integrity of the multiple annular ribs 3.

[0072] In some embodiments, such asFigure 1 , Figure 2 As shown, the connection node between the new beam and the existing column also includes multiple through bars 9, of which two through bars 9 are set on the same horizontal plane, and one end of the two through bars 9 on the same side passes through the ring bar 3 and avoids the existing column 1 respectively, and the other end of the two through bars 9 on the same side is arranged crosswise; concrete can be poured on the other end of the two through bars 9 on the same side and on the longitudinal reinforcement 4 of the new beam to form the new beam 5.

[0073] In the above embodiment, multiple through bars 9 are set and poured together with the longitudinal reinforcement 4 of the new beam to form a new beam 5, so as to ensure the continuous transmission of bending moment at the connection node between the new beam and the existing column.

[0074] Specifically, such as Figure 1 , Figure 2 As shown, in this embodiment, the through bar 9 is fixedly connected to the uppermost annular bar 3; the diameter of the through bar 9 is the same as the diameter of the maximum longitudinal bar of the newly added beam 5.

[0075] In some embodiments, such as Figure 1 , Figure 2 As shown, column 1 is a square column, and the innermost annular rib 3 abuts against the edge of the square column.

[0076] In the above embodiment, the innermost annular rib 3 of the existing column 1, which is a square column, abuts against the edge of the square column to ensure the connection stability of the annular rib 3.

[0077] In some embodiments, such as Figure 1 , Figure 2 As shown, a clearance 10 is formed between the outer surface of the square column and the innermost annular reinforcement 3; the connection node between the new beam and the existing column also includes a filler reinforcement 11, which is located in the clearance 10.

[0078] In the above embodiment, when the existing column 1 is set as a square column, the filling reinforcement 11 is set in the void 10 to improve the integrity of the internal steel reinforcement structure of the connection node between the new beam and the existing column, and further improve the structural stability of the connection node between the new beam and the existing column.

[0079] Specifically, such as Figure 1 , Figure 2 As shown, the clearance 10 formed between the outer surface of the square column and the innermost annular rib 3 is crescent-shaped. The filling rib 11 includes additional long ribs 12 and additional short ribs 13. Multiple additional long ribs 12 are arranged in parallel and distributed along the length of the clearance 10; multiple additional short ribs 13 are provided and are spaced apart between adjacent additional long ribs 12.

[0080] In some embodiments, such as Figure 1 , Figure 2As shown, column 1 is designed as a circular column, and the innermost annular rib 3 is attached to the outer surface of the circular column.

[0081] In the above embodiment, the innermost annular rib 3 of the existing column 1, which is a circular column, is attached to the outer surface of the circular column to ensure the connection stability of the annular rib 3.

[0082] According to an embodiment of the present invention, in another aspect, a construction method for a new beam-existing column connection node is also provided, for constructing the new beam-existing column connection node described in the above embodiment. The construction method includes the following steps:

[0083] Step S1: Chisel away the area at the junction of the new circumferential beam 5 and the existing column 1, remove the protective layer of the existing column 1, and expose the supporting reinforcement inside the existing column 1.

[0084] Step S2: Open holes at the chiseling location of the existing column 1, and make the holes avoid the longitudinal reinforcement inside the existing column 1.

[0085] Step S3: Set the connecting rib 2 in the hole, and make at least a portion of the connecting rib 2 extend out of the hole;

[0086] Step S4: Install annular reinforcement 3 around the existing column 1, and fix the annular reinforcement 3 to the part of the connecting reinforcement 2 that extends out of the hole;

[0087] Step S5: Fix the newly added longitudinal reinforcement 4 of the beam to the ring reinforcement 3;

[0088] Step S6: Pour concrete onto the connecting reinforcement 2 and the ring reinforcement 3 to form a ring beam;

[0089] Step S7: Pour concrete onto the longitudinal reinforcement 4 of the new beam to form the new beam 5.

[0090] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A connection node between a newly added beam and an existing column, characterized in that, include: There is an existing column (1) with recessed holes along its circumference; A connecting rib (2) is provided in the hole, and at least a portion of the connecting rib (2) extends out of the hole; A ring-shaped rib (3) is provided on the periphery of the existing column (1) and is fixedly connected to the part of the connecting rib (2) that extends out of the hole. The longitudinal reinforcement (4) of the new beam is fixedly connected to the ring reinforcement (3), and concrete can be poured on the longitudinal reinforcement (4) of the new beam to form the new beam (5); A concrete layer (6) is formed on the connecting bar (2), the ring bar (3) and the longitudinal reinforcement (4) of the new beam, so that the new beam (5) is formed on the existing column (1).

2. The connection node between the newly added beam and the existing column according to claim 1, characterized in that, The existing column (1) has a groove (7) formed in the circumference. The groove (7) is formed by chiseling inward from at least a portion of the existing column (1) in the circumference and exposing the supporting ribs inside the existing column (1). The hole is located in the slot (7) and avoids the support ribs inside the existing column (1).

3. The connection node between the newly added beam and the existing column according to claim 1 or 2, characterized in that, The holes are provided in multiple directions along the circumference of the existing column (1); And / or, the holes are provided in multiple directions along the height of the existing column (1).

4. The connection node between the newly added beam and the existing column according to claim 1, characterized in that, The annular reinforcement (3) is provided in multiple directions away from the existing column (1); And / or, the annular reinforcement (3) is provided in multiple directions along the height of the existing column (1).

5. The connection node between the newly added beam and the existing column according to claim 4, characterized in that, It also includes stirrups (8) that are arranged around the periphery of the plurality of annular bars (3), and the plurality of stirrups (8) are arranged at circumferential intervals along the annular bars (3).

6. The connection node between the newly added beam and the existing column according to claim 1, characterized in that, It also includes multiple through bars (9), two of which are set on the same horizontal plane, and one end of the two through bars (9) on the same side passes through the ring bar (3) and avoids the existing column (1), and the other ends of the two through bars (9) on the same side are arranged crosswise. Concrete can be poured onto the other end of the two through bars (9) on the same side and onto the longitudinal reinforcement (4) of the new beam to form the new beam (5).

7. The connection node between the newly added beam and the existing column according to any one of claims 1-2 and 4-6, characterized in that, The existing column (1) is a square column, and the innermost annular rib (3) abuts against the edge of the square column.

8. The connection node between the newly added beam and the existing column according to claim 7, characterized in that, An open space (10) is formed between the outer surface of the square column and the innermost annular rib (3); The connection node between the new beam and the existing column also includes a filler bar (11), which is located in the void (10).

9. The connection node between the newly added beam and the existing column according to any one of claims 1-2 and 4-6, characterized in that, The existing column (1) is a circular column, and the innermost annular rib (3) is attached to the outer surface of the circular column.

10. A construction method for a new beam-existing column connection node, used for constructing the new beam-existing column connection node as described in any one of claims 1-9, characterized in that, The construction method includes: The boundary between the new circumferential beam (5) and the existing column (1) is chiseled to remove the protective layer of the existing column (1) and expose the longitudinal steel bars inside the existing column (1). Holes are made at the chiseling location of the existing column (1), and the holes are made to avoid the longitudinal steel bars inside the existing column (1). A connecting rib (2) is provided in the hole, and at least a portion of the connecting rib (2) extends out of the hole; A ring-shaped rib (3) is provided around the existing column (1), and the ring-shaped rib (3) is fixedly connected to the part of the connecting rib (2) that extends out of the hole. The newly added longitudinal reinforcement (4) of the beam is fixedly connected to the ring reinforcement (3); Concrete is poured onto the connecting bar (2) and the annular bar (3) to form a ring beam; Concrete is poured onto the longitudinal reinforcement (4) of the newly added beam to form the new beam (5).

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