A method for reconstructing a support beam

Abstract

This invention discloses a method for modifying a beam-supported column by relocating it. The method includes: identifying the original frame column to be modified, where the original frame column supports the original frame beam; determining the pre-modification location of the original frame column; constructing a new frame column at the pre-modification location; connecting the column head of the new frame column to the column head of the original frame column, so that the new frame column and the original frame column share the load transmitted by the original frame beam; cutting off the original frame column, with the cut-off location located below the connection between the original frame column and the new frame column; and removing the portion of the original frame column below the cut-off location. This method of modifying a beam-supported column by relocating it involves only the construction of a new column and reinforcement of the column head. The modification scope is small, the construction is simple and reliable, the cost is low, and the construction period is short. No reinforcement of the original frame beam and original frame column is required, the building's net height and usable area remain unchanged, and it does not affect subsequent use.

Description

Technical Field

[0001] This invention relates to the field of building repair technology, and in particular to a method for modifying beam-supported columns. Background Technology

[0002] When reinforcing or renovating a building, if insufficient clearance is encountered, the relevant technical solution is to remove the columns that affect the usable space and reinforce adjacent components according to the stress requirements. This approach often alters the original structural load-bearing system, requiring further reinforcement before the structure can be used normally.

[0003] The relevant technical solutions require reinforcement of other components of the original structure, such as frame beams and frame columns, after the column is removed. The reinforcement methods are often complex, the scope of the modification is large, the cost is high, the construction period is long, and the effect of the reinforcement is often directly related to the quality of construction. If the reinforcement quality is not up to standard, it will directly affect the load-bearing capacity of the structure.

[0004] Reinforcing frame beams using methods such as enlarging the concrete cross-section or adding steel reinforcement underneath will increase the beam cross-section, reducing the building's net height and impacting its usability. Similarly, reinforcing frame columns using methods such as enlarging the concrete cross-section or encasing them in steel will increase the column cross-section, reducing the usable floor area and affecting future usability.

[0005] Furthermore, the column removal modification involves the transformation of vertical components in the force transmission path, resulting in vertical irregularity, an imperfect structural system, a complex force transmission path, and complex design and construction. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose a method for modifying beam-supported columns, which uses a method of building first and then dismantling to move the original structural columns, thereby increasing the usable room area and meeting the usage requirements.

[0008] The beam-column relocation modification method of this invention includes:

[0009] Identify the original frame columns to be modified, and the beams supported by the original frame columns are the original frame beams;

[0010] Determine the pre-modification location of the original frame column, and construct a new frame column at the pre-modification location;

[0011] The column head of the new frame column is connected to the column head of the original frame column so that the new frame column and the original frame column share the load transmitted by the original frame beam.

[0012] The original frame column is cut off, and the cut-off position of the original frame column is located at the lower part of the connection between the original frame column and the new frame column;

[0013] Remove the portion of the original frame column below the cut-off position.

[0014] The beam-column relocation method of this invention only requires the construction of new columns and reinforcement of column heads. The scope of the renovation is small, the construction is simple and reliable, the cost is low, and the construction period is short. No reinforcement of the original frame beams and columns is required, the building's net height and usable area remain unchanged, and it does not affect subsequent use.

[0015] Furthermore, this invention does not change the force transmission path of the original structure, nor does it change the original structural system. There are no vertical conversion components in the force transmission path, and it does not belong to a vertically irregular structure. The structural system is reliable and reasonable.

[0016] In some embodiments, the capital of the new frame column is a corbel capital, and the retained portion of the original frame column is located within the capital of the new frame column.

[0017] In some embodiments, the peripheral wall surface of the retained portion of the original frame column is parallel to the peripheral wall surface of the column head of the new frame column, and the vertical distance between them is greater than or equal to 100 mm.

[0018] In some embodiments, the cross-section of the retained portion of the original frame column is parallel to the bottom slope of the column head of the new frame column, and the vertical distance between them is greater than or equal to 200 mm. The angle between the bottom slope of the column head of the new frame column and the wall surface of the column body that intersects with it is 135°.

[0019] In some embodiments, the top surface of the column head of the new frame column is located above the bottom surface of the original frame beam, and the vertical distance between the two is greater than or equal to 150 mm.

[0020] In some embodiments, before constructing the new frame column, the column head of the original frame column is pre-processed to install multiple connectors on the column head of the original frame column.

[0021] During the construction of the new frame column, the column head of the original frame column is connected to the column head of the new frame column through the connector, so that the force on the original frame column is transferred to the new frame column through the connector.

[0022] In some embodiments, the preprocessing of the original frame columns includes:

[0023] Multiple through holes are opened on the column head of the original frame column. The through holes extend horizontally and are spaced apart vertically.

[0024] Multiple connectors correspond one-to-one with multiple through holes. Each connector includes an I-beam and multiple tie bars. The I-beam and multiple tie bars are passed through the corresponding through holes, and grout is injected into the through holes.

[0025] In some embodiments, the construction process of the new frame column includes:

[0026] The steel reinforcement of the new frame column is constructed such that the steel reinforcement of the corbel part of the new frame column surrounds the column head of the original frame column;

[0027] Tie multiple of the tie bars to the longitudinal bars of the new frame column;

[0028] The new frame column and the column head of the original frame column are cast as a whole, so that the column head of the original frame column becomes part of the column head of the new frame column.

[0029] In some embodiments, support tools are installed at the bottom of the original frame beams before the original frame columns are cut off.

[0030] In some embodiments, after removing the portion of the original frame column below the cut-off position, the section of the retained portion of the original frame column is cast. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the original frame column of the present invention.

[0032] Figure 2 This is a schematic diagram of the pre-processed original frame column of the present invention.

[0033] Figure 3 yes Figure 2 A schematic diagram of the cross-section shown at point AA.

[0034] Figure 4 This is a schematic diagram of the new frame column and the original frame column of the present invention.

[0035] Figure 5 yes Figure 4 A schematic diagram of the cross-section shown at point BB.

[0036] Figure 6 yes Figure 4 A schematic diagram of the cross-section shown at point CC.

[0037] Figure 7 yes Figure 4 A schematic diagram of the cross-section shown at point DD.

[0038] Figure 8 This is a schematic diagram of the original frame column after it has been cut off according to the present invention.

[0039] Figure label:

[0040] Original frame column 1, retained section 101, section to be demolished 102.

[0041] 11. Through hole; 12. I-beam; 13. Tie bar.

[0042] Original frame beam 2

[0043] New frame column 3, part to be poured 301. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] The following describes the beam-column relocation modification method according to an embodiment of the present invention with reference to the accompanying drawings.

[0046] like Figures 1 to 8 As shown, the beam-column relocation modification method of this invention includes:

[0047] The original frame column 1 to be renovated within the building is identified. The beam supported by the original frame column 1 is the original frame beam 2, that is, the beam connected to the column head of the original frame column 1 is the original frame beam 2. At this time, the original frame column 1 bears the load transmitted by the original frame beam 2.

[0048] Determine the proposed location for the modification of the original frame column 1, and construct a new frame column 3 at the proposed location. It is important to note that the straight-line distance between the location of the new frame column 3 and the location of the original frame column 1 should be within 2 meters.

[0049] The column head of the new frame column 3 is connected to the column head of the original frame column 1 so that the new frame column 3 and the original frame column 1 can jointly bear the load transmitted by the original frame beam 2.

[0050] The original frame column 1 is cut off at the lower part of the connection between the original frame column 1 and the new frame column 3. That is, it is cut off at the top of the original frame column 1.

[0051] Remove the portion of the original frame column 1 below the cut-off point; that is, remove the column body of the original frame column 1 while retaining the column head.

[0052] Understandably, during the renovation process, the way the building structure is subjected to force is as follows: first, the original frame column 1 bears the upper load transmitted by the original frame beam 2. Then, a new frame column 3 is built next to the original frame column 1, and the column head of the original frame column 1 is connected to the column head of the new frame column 3. After the construction of the new frame column 3 is completed, the old and new frame columns jointly bear the upper force. After the original frame column 1 is disconnected, the new frame column 3 bears all the upper force.

[0053] The beam-and-column relocation method of this invention adopts a build-then-dismantle approach, shifting the original frame column 1 horizontally to increase the net space of the building. During the renovation process, the new frame column 3 and the original frame column 1 jointly bear the load transmitted by the original frame beam 2, thus eliminating the need to reinforce the original frame beam 2 and the original frame column 1. The net height and usable area of ​​the building remain unchanged, and subsequent use is not affected.

[0054] Furthermore, the original force transmission path and structural system are not changed during the renovation process. There are no vertical conversion components in the force transmission path, and it is not a vertically irregular structure. The structural system is reliable and reasonable.

[0055] Therefore, compared with the modification methods of related technologies, the beam-column relocation modification method of the present invention has a smaller scope of reinforcement and modification, a simple and reliable construction process, low construction cost, and short construction period.

[0056] In some embodiments, such as Figure 4 and Figure 8 As shown, the column capital of the new frame column 3 is a corbel column capital, and the retained part 101 of the original frame column 1 is located inside the column capital of the new frame column 3.

[0057] Among them, such as Figure 4 As shown, the dashed part of the original frame column 1 is the part 102 to be demolished, which is the column body of the original frame column 1. The solid part of the original frame column 1 is the part 101 to be retained, which is the column head of the original frame column 1.

[0058] It is understandable that, such as Figures 4 to 8 As shown in the embodiment of the present invention, the column head of the new frame column 3 is designed as a corbel column head, which can provide sufficient support area to evenly distribute the load of the original frame beam 2 onto the new frame column 3, so as to better bear the load of the original frame beam 2. The column head of the original frame column 1 serves as part of the corbel column head of the new frame column 3, ensuring the continuity and stability of the structure during the renovation process.

[0059] Optionally, such as Figures 4 to 7 As shown, the cross-sectional area of ​​the corbel of the new frame column 3 is larger than that of the capital of the original frame column 1, so as to enclose the capital of the original frame column 1. The cross-sectional area of ​​the shaft of the new frame column 3 is larger than that of the shaft of the original frame column 1, to ensure a smooth transition between the shaft and the capital of the new frame column 3, and to avoid the visual disharmony of a thin shaft and a large capital.

[0060] The peripheral wall of the retained portion 101 of the original frame column 1 is parallel to the peripheral wall of the column head of the new frame column 3. In other words, the four horizontal walls of the original frame column 1 are parallel to the four horizontal walls of the new frame column 3.

[0061] Furthermore, the vertical distance between each wall surface of the new frame column 3 and the original frame column 1 is greater than or equal to 100mm, to ensure that the column head of the new frame column 3 properly wraps around the column head of the original frame column 1.

[0062] Furthermore, such as Figure 4 and Figure 8 As shown, the cross-section of the retained portion 101 of the original frame column 1 is parallel to the bottom slope of the column head of the new frame column 3, and the vertical distance between them is greater than or equal to 200mm. The top surface of the column head of the new frame column 3 is located above the bottom surface of the original frame beam 2, and the vertical distance between them is greater than or equal to 150mm. This ensures that the column head of the original frame column 1 is completely enclosed by the column head of the new frame column 3 in all three dimensions (up, down, front, back, left, and right), thereby improving the integrity and stability of the modified new frame column 3 structure.

[0063] Preferably, the angle between the bottom slope of the column head of the new frame column 3 and the wall surface of the column body that intersects with it is 135°, so as to improve the stability of the new frame column 3 in transitioning the load of the original frame beam 2 and ensure that the appearance of the modified structure is more harmonious.

[0064] In some embodiments, such as Figure 2 As shown, before constructing the new frame column 3, the column head of the original frame column 1 is pre-treated to install multiple connectors on the column head of the original frame column 1, so that the column head of the original frame column 1 can be connected to the column head of the new frame column 3 through the connectors.

[0065] like Figures 4 to 7 As shown, during the construction of the new frame column 3, the column head of the original frame column 1 is connected to the column head of the new frame column 3 through a connector, so that the force on the original frame column 1 is transferred to the new frame column 3 through the connector.

[0066] Optionally, such as Figure 2 As shown, the preprocessing of the original frame column 1 includes:

[0067] Multiple through holes 11 are made on the column head of the original frame column 1 at a position adjacent to the original frame beam 2. The through holes 11 extend horizontally and are distributed at intervals in the vertical direction.

[0068] Multiple connectors correspond one-to-one with multiple through holes 11. The connectors include I-beams 12 and multiple tie bars 13. The I-beams 12 and multiple tie bars 13 are connected together through their corresponding through holes 11, and grout is injected into the through holes 11. After the grout has solidified, the I-beams 12 and tie bars 13 are fixed to the column heads of the original frame columns 1, thus completing the pretreatment of the original frame columns 1.

[0069] The distance between the through holes 11 is greater than 500mm, and the distance between the two ends of the I-beam 12 extending beyond the through holes 11 is 175mm. The length of the tie bar 13 extending is determined according to the reinforcement of the column head of the new frame column 3 to ensure that the tie bar 13 can be firmly connected to the reinforcement of the new frame column 3.

[0070] The beam-and-column relocation method of this invention aims to remove the original frame column 1 and transfer its load to the new frame column 3. To ensure a smooth transition of load and the safety of the original building during the renovation process, two openings are made at the top of the original frame column 1, and I-beams 12 are added into the openings to facilitate a good connection between the old and new columns and to transfer shear force, thus achieving a smooth transition of load from the original frame column 1 to the new frame column 3. Tie bars 13 are also placed at the openings to ensure the integrity of the connection between the column head of the original frame column 1 and the corbel of the newly added frame column.

[0071] In some embodiments, the construction process of the new frame column 3 includes:

[0072] First, construct the reinforcing steel for the new frame column 3. The reinforcing steel at the corbel of the new frame column 3 should surround the column head of the original frame column 1. It is important to note that the corbel of the new frame column 3 must enclose the I-beam 12 to avoid it being exposed and affecting the aesthetics.

[0073] Then, the multiple tie bars 13 are tied to the longitudinal bars of the new frame column 3.

[0074] Finally, the column heads of the new frame column 3 and the original frame column 1 are cast as a whole, so that the column head of the original frame column 1 becomes part of the column head of the new frame column 3, thereby smoothly transferring the load of the original frame beam 2 to the column head, column body and foundation of the new frame column 3.

[0075] Therefore, once the new frame column 3 is completed and reaches its design strength, the original frame column 1 can be cut off to achieve the purpose of supporting the beam and moving the column, which can prevent the overall structural safety problem caused by the sudden change in the force transmission mode.

[0076] Furthermore, the use of integral casting during the construction of the new frame column 3 ensures the integration of the old and new structures, improving the stability and load-bearing capacity of the structure. This construction method also reduces the complexity and time required for construction.

[0077] In some embodiments, before cutting off the original frame column 1, a support tool is installed at the bottom of the original frame beam 2.

[0078] Understandably, before cutting off the original frame column 1, necessary support measures should be taken, such as using jacks or supporting scaffolding to support the bottom of the beam. After disconnecting the original frame column 1, the upward force on the jacks or supporting scaffolding should be gradually unloaded to avoid sudden deformation and displacement of the structure. Furthermore, the deflection of the frame beam should be monitored throughout the construction process.

[0079] In some embodiments, such as Figure 8 As shown, after removing the portion of the original frame column 1 below the cut-off position, the section of the retained portion 101 of the original frame column 1 is poured. This portion is the part to be poured, 301, which is... Figure 8 The filled part.

[0080] Specifically, after the construction of the new frame column 3 is completed, a 45° bevel is made 200mm below the lowest through-hole 11 on the original frame column 1. After cutting off the original frame column 1, the column body of the original frame column 1 is removed. After removal, the cross-section is poured. This design can enhance the stability of the modified structure and ensure the long-term safe use of the structure.

[0081] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and are not intended to 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 this invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A method for modifying a beam-supported column, characterized in that, include: Identify the original frame columns to be modified, and the beams supported by the original frame columns are the original frame beams; Determine the pre-modification location of the original frame column, and construct a new frame column at the pre-modification location; The column head of the new frame column is connected to the column head of the original frame column so that the new frame column and the original frame column share the load transmitted by the original frame beam. The original frame column is cut off, and the cut-off position of the original frame column is located at the lower part of the connection between the original frame column and the new frame column; Remove the portion of the original frame column below the cut-off position; The new frame column has a corbel capital, and the retained portion of the original frame column is located inside the capital of the new frame column. The peripheral wall surface of the retained portion of the original frame column is parallel to the peripheral wall surface of the column head of the new frame column, and the vertical distance between the two is greater than or equal to 100mm. The cross-section of the retained portion of the original frame column is parallel to the bottom slope of the column head of the new frame column, and the vertical distance between them is greater than or equal to 200mm. The angle between the bottom slope of the column head of the new frame column and the wall surface of the column body that intersects with it is 135°.

2. The method for modifying a beam-supported column according to claim 1, characterized in that, The top surface of the column head of the new frame column is located above the bottom surface of the original frame beam, and the vertical distance between the two is greater than or equal to 150mm.

3. The method for modifying a beam-column structure according to any one of claims 1-2, characterized in that, Before constructing the new frame column, the column head of the original frame column is pre-treated so that multiple connectors can be installed on the column head of the original frame column. During the construction of the new frame column, the column head of the original frame column is connected to the column head of the new frame column through the connector, so that the force on the original frame column is transferred to the new frame column through the connector.

4. The method for modifying a beam-supported column according to claim 3, characterized in that, The pretreatment of the original frame columns includes: Multiple through holes are opened on the column head of the original frame column. The through holes extend horizontally and are spaced apart vertically. Multiple connectors correspond one-to-one with multiple through holes. Each connector includes an I-beam and multiple tie bars. The I-beam and multiple tie bars are passed through the corresponding through holes, and grout is injected into the through holes.

5. The method for modifying a beam-supported column according to claim 4, characterized in that, The construction process of the new frame columns includes: The steel reinforcement of the new frame column is constructed such that the steel reinforcement of the corbel part of the new frame column surrounds the column head of the original frame column; Tie multiple of the tie bars to the longitudinal bars of the new frame column; The new frame column and the column head of the original frame column are cast as a whole, so that the column head of the original frame column becomes part of the column head of the new frame column.

6. The method for modifying a beam-supported column according to claim 5, characterized in that, Before cutting the original frame column, support tools are installed at the bottom of the original frame beam.

7. The method for modifying a beam-supported column according to claim 5, characterized in that, After removing the portion of the original frame column below the cut-off position, the section of the remaining portion of the original frame column is poured.

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