Newly-added interlayer structure of existing structure and construction method of newly-added interlayer structure

Abstract

The invention relates to the field of building construction engineering, in particular to a newly-added interlayer structure of an existing structure and a construction method of the newly-added interlayer structure. The newly-added interlayer structure comprises a newly-added floor slab arranged above the opening and another newly-added floor slab arranged below the opening, a plurality of newly-added structural beams are arranged on the two newly-added floor slabs, and the newly-added floor slabs and the newly-added structural beams are of reinforced concrete structures and are connected to the existing structure; the newly-added structural wall is arranged between the two newly-added floor slabs, the newly-added structural wall is arranged at the edge of the design range of the newly-added interlayer structure, the newly-added structural wall is of a reinforced concrete structure, and the newly-added structural wall and the newly-added floor slabs jointly define a newly-added interlayer space. The method has the beneficial effects that the original structure floor slab in the design range of the newly-added interlayer is chiseled away, so that the design height of the newly-added interlayer breaks through the height between the upper and lower adjacent floor slabs, and the formed newly-added interlayer can contain more and larger equipment.

Description

Technical Field

[0001] This invention relates to the field of building construction engineering, and specifically to a method for constructing a new mezzanine layer in an existing structure. Background Technology

[0002] A building mezzanine is a partial floor located between two natural floors in a building, also known as a technical floor or equipment floor. Its core function is to centrally house public pipelines and equipment and professional facilities, including central air conditioning, elevator equipment, and power distribution systems.

[0003] Traditional building mezzanines are usually set between two adjacent floor slabs, so that the height of the resulting mezzanine is less than the distance between the original adjacent floor slabs. When the size of the equipment is larger than the distance between the adjacent floor slabs, the building mezzanine cannot accommodate the equipment to be installed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new mezzanine structure for existing structures and its construction method, thereby solving the problem that the height of existing building mezzanines is limited and cannot accommodate larger equipment.

[0005] The technical solution to achieve the above objectives is: This invention provides a new mezzanine structure for an existing structure, the existing structure including an original structural floor slab, with an opening on the original structural floor slab at a position corresponding to the design range of the new mezzanine structure. The new mezzanine structure includes: A new floor slab is provided above the opening and another new floor slab is provided below the opening. Several new structural beams are provided on the two new floor slabs. The new floor slabs and the new structural beams are reinforced concrete structures and are connected to the existing structure. A new structural wall is added between the two newly added floor slabs. The new structural wall is located at the edge of the design range of the new mezzanine structure. The new structural wall is a reinforced concrete structure. The new structural wall and the new floor slabs together enclose the new mezzanine space.

[0006] Furthermore, the existing structure also includes: original structural walls, original structural columns, and original structural beams; The newly added floor slab and the newly added structural beam are connected to the original structural columns corresponding to the design range of the newly added mezzanine structure. The outer surface of the original structural column connected to the newly added floor slab and the newly added structural beam is provided with an outer covering structure, and the newly added floor slab and the newly added structural beam are connected to the original structural column through the outer covering structure.

[0007] Furthermore, the outer structure includes: The first tie bar is horizontally set and one end is anchored into the original structural column and connected to the steel bars in the original structural column. There are several first tie bars, which are distributed in multiple layers at intervals above and below, and multiple tie bars are distributed at intervals in each layer. Multiple stirrups of different sizes are arranged around the outside of the original structural column and connected to the first tie rod; Concrete is applied to the outer surface corresponding to the original structural column to bury the first tie bar and the stirrup.

[0008] Furthermore, the cross-sectional dimension of the end where the newly added structural beam connects to the original structural column is larger than the cross-sectional dimension of the newly added structural beam, and the number of reinforcing bars in the end is greater than the number of reinforcing bars in the newly added structural beam.

[0009] Furthermore, if the original structural beam is located at the designed position of the newly added structural wall, the original structural beam will not be removed, and the newly added structural wall will be connected to the original structural beam.

[0010] Furthermore, the ends of the corresponding reinforcing bars in the newly added structural wall are anchored into the newly added structural beam or the original structural beam.

[0011] Furthermore, the newly added structural wall has at least one.

[0012] Furthermore, the reinforcing steel bars inside the newly added structural beam include: Several longitudinal reinforcement bars are spaced apart and distributed along the length of the newly added structural beam; Several stirrups, adapted to the cross-section of the newly added structural beam, are fitted onto several longitudinal bars; Several second tie rods are provided, the ends of which are bent into a U-shape and hooked onto the corresponding longitudinal ribs. The second tie rods are fixedly connected to the longitudinal ribs.

[0013] This invention also provides a construction method for adding a sandwich structure to an existing structure, specifically including the following steps: S1: According to the design drawings, remove the original structural floor slab within the design scope of the newly added mezzanine structure; S2: Construct new floor slabs and new structural beams, so that the steel bars inside the new floor slabs and new structural beams are anchored into the existing structure; S3: Construct a new structural wall, anchoring the steel bars inside the new structural wall into the existing structure, the new floor slab, or the new structural beam, thereby completing the construction of the new mezzanine structure.

[0014] Furthermore, the existing structure also includes: original structural walls, original structural columns, and original structural beams; Before step S2, the surfaces of the original structural column, the new floor slab, and the new structural beam to be connected are roughened, and when laying the reinforcing bars, the ends of the reinforcing bars are anchored into the original structural column.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By removing the original structural floor slabs within the design scope of the new mezzanine structure, the design height of the new mezzanine structure can exceed the height between two adjacent floor slabs, allowing the newly formed mezzanine structure to accommodate more and larger equipment.

[0016] By anchoring the steel reinforcement inside the new mezzanine structure into the existing structure, the stress of the new mezzanine structure is evenly released into the existing structure. This avoids the concrete columns cast on the original floor slab supporting the new mezzanine structure, which would otherwise cause the entire load of the new mezzanine structure to be applied to the original floor slab and affect the stability of the structure.

[0017] By adding an outer cladding structure to the outer surface of the original structural column, the cross-sectional dimensions of the original structural column are increased, thereby enabling the original structural column to withstand the weight of the new floor slab and new structural beam, making the structure more stable. Attached Figure Description

[0018] Figure 1 This is a side sectional view of the newly added sandwich structure in the existing structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the original structural floor slab cutting range for the newly added mezzanine structure in the existing structure of this invention.

[0020] Figure 3 This is a schematic diagram of the original floor slab after cutting, which is the structure of the new mezzanine added to the existing structure of the present invention.

[0021] Figure 4 This is a top view of the newly added structural beam in the existing structure of the present invention, which is a newly added sandwich structure.

[0022] Figures 5 to 9 This is a schematic diagram of the outer structure of the newly added sandwich structure in the existing structure of the present invention.

[0023] Figure 10 This is a side view of the connection between the newly added structural beam and the outer structure in the newly added sandwich structure of the existing structure of the present invention.

[0024] Figure 11 This is a top view of the connection between the newly added structural beam and the outer structure in the newly added sandwich structure of the existing structure of the present invention.

[0025] Figure 12 This is a schematic diagram showing the connection between the newly added structural beam and the original structural beam in the newly added sandwich structure of the existing structure of the present invention.

[0026] Figure 13 This is a schematic diagram showing the connection between the newly added structural beam and the original structural wall in the newly added mezzanine structure of the existing structure of the present invention.

[0027] Figure 14 This is a schematic cross-sectional view of the newly added structural beam in the newly added sandwich structure of the existing structure of the present invention.

[0028] Figures 15 to 16 This is a schematic diagram showing the connection between the newly added structural wall and the original structural beam in the newly added mezzanine structure of the existing structure of the present invention.

[0029] Figures 17 to 19 This is a schematic diagram showing the connection between the newly added structural wall and the original structural wall in the newly added sandwich structure of the existing structure of the present invention.

[0030] Legend: 1. Original structural floor slab; 2. Newly added floor slab; 3. Newly added structural wall; 4. Original structural wall; 5. Original structural column; 6. Original structural beam; 7. External structure; 8. Newly added structural beam. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] See Figure 1 This invention provides a method for constructing a new mezzanine in an existing structure, addressing the problem that existing building mezzanines have limited height and cannot accommodate larger equipment. To solve this problem, the invention removes the original floor slabs within the design scope of the new mezzanine, thereby increasing the height of the new mezzanine beyond the distance between adjacent floor slabs in the existing structure. This results in sufficient internal height for the new mezzanine to accommodate more and larger equipment.

[0033] The steel reinforcement inside the new mezzanine structure is anchored into the existing structure, eliminating the need to pour concrete on the original floor slab to support the new mezzanine. This allows the load of the new mezzanine to be evenly distributed within the existing structure, preventing structural collapse due to stress concentration. To improve the load-bearing capacity of the original structural columns, an outer cladding structure composed of steel reinforcement and concrete is installed on the outer surface of the original columns, enabling them to withstand the loads of the new structural beams and floor slabs.

[0034] The following description, in conjunction with the accompanying drawings, illustrates a new sandwich structure for an existing structure and its construction method.

[0035] See Figure 1 This shows a side sectional view of the newly added sandwich structure in the existing structure of the present invention. (See also...) Figure 2 This diagram illustrates the cutting range of the original structural floor slab in the newly added mezzanine structure of the present invention. (See also...) Figure 3This diagram shows a schematic representation of the original floor slab after cutting, representing the addition of a mezzanine layer to the existing structure of this invention. (See also...) Figure 4 This shows a top view of the newly added structural beam in the existing structure of the present invention, which incorporates a newly added sandwich structure. The following is in conjunction with... Figures 1 to 4 This invention describes a new sandwich structure for an existing structure and its construction method.

[0036] like Figures 1 to 4 As shown, the present invention provides a new mezzanine structure for an existing structure. The existing structure includes an original structural floor slab 1, and an opening is provided on the original structural floor slab 1 at a position corresponding to the design range of the new mezzanine structure. The new mezzanine structure includes: A new floor slab 2 is provided above the opening and another new floor slab 2 is provided below the opening. Several new structural beams 8 are provided on the two new floor slabs 2. The new floor slabs 2 and the new structural beams 8 are reinforced concrete structures and are connected to the existing structure. A new structural wall 3 is provided between the two new floor slabs 2. The new structural wall 3 is located at the edge of the design range of the new mezzanine structure. The new structural wall 3 is a reinforced concrete structure. The new structural wall 3 and the new floor slabs 2 together enclose the new mezzanine space.

[0037] The newly added structural beam 8 is located on the side of the newly added floor slab 2 away from the interior space of the newly added mezzanine structure. For example, the newly added structural beam 8 is located at the bottom of the lower newly added floor slab 2 and at the top of the upper newly added floor slab 2. This ensures that there is sufficient usable space inside the newly added mezzanine structure, while making the top surface of the lower newly added floor slab 2 flat for easy use.

[0038] Specifically, the newly added structural wall 3 has a pre-reserved doorway, the bottom of which is flush with the top surface of the original structural floor slab 1, facilitating personnel access and allowing equipment to be moved through the doorway. Equipment installed in the newly added mezzanine structure can be disassembled into parts and then assembled inside the new mezzanine structure, depending on the actual situation, avoiding situations where it is difficult to enter the new mezzanine structure.

[0039] In one specific embodiment, the existing structure further includes: the original structural wall 4, the original structural column 5, and the original structural beam 6; The newly added floor slab 2 and the newly added structural beam 8 are connected to the original structural column 5 within the design range of the newly added mezzanine structure. The outer surface of the original structural column 5 connected to the newly added floor slab 2 and the newly added structural beam 8 is provided with an outer covering structure 7. The newly added floor slab 2 and the newly added structural beam 8 are connected to the original structural column 5 through the outer covering structure 7.

[0040] In one specific embodiment, the outer structure 7 includes: The first tie bar is horizontally set and one end is anchored into the original structural column 5 and connected to the steel bar in the original structural column 5. There are several first tie bars, which are distributed in multiple layers at intervals above and below, and multiple tie bars are distributed at intervals in each layer. Multiple stirrups of different sizes are arranged around the outside of the original structural column 5 and connected to the first tie rod; Concrete is placed on the outer surface corresponding to the original structural column 5 to bury the first tie bar and the stirrup.

[0041] Specifically, depending on the location of the original structural column 5, the outer cladding structure 7 on the outer surface of the original structural column 5 has three forms. For example... Figure 5 As shown, if the original structural column 5 is entirely within the design scope of the newly added mezzanine structure, then all four sides of the original structural column 5 will be equipped with an outer enclosure structure 7. For example... Figure 6 As shown, if the original structural column 5 is within the design range of the newly added mezzanine structure, but one side is at the design edge of the newly added mezzanine structure, then the side at the design edge will not have an outer enclosure structure 7, and the outer enclosure structure 7 will be provided on the other three sides of the original structural column 5 that are within the design range of the newly added mezzanine structure. For example... Figure 7 As shown, if one side of the original structural column 5 is connected to the original structural wall 4, then the reinforcing bars of the outer casing 7 on the outer surface of the original structural column 5 are anchored into the original structural wall 4, thereby making the outer casing 7 firmly connected to the original structural wall 4. Figure 8 As shown, if the original structural column 5 is within the design scope of the newly added mezzanine structure, but two of its sides are at the design edge of the newly added mezzanine structure, then the other two sides within the design scope of the newly added mezzanine structure will be fitted with an outer enclosure structure 7. For example... Figure 9 As shown, if the two sides of the original structural column 5 are connected to the original structural wall 4, then the steel bars of the outer casing structure 7 on the outer surface of the original structural column 5 are anchored into the original structural wall 4.

[0042] Specifically, such as Figure 10 As shown, the steel bars of the newly added structural beam 8 are fixedly connected to the corresponding longitudinal bars in the outer structure 7, and further anchored into the original structural column 5, thereby making the connection between the newly added structural beam 8, the outer structure 7, and the original structural column 5 more solid.

[0043] In one specific embodiment, the cross-sectional dimension of the end where the newly added structural beam 8 connects to the original structural column 5 is larger than the cross-sectional dimension of the newly added structural beam 8, and the number of reinforcing bars in the end is greater than the number of reinforcing bars in the newly added structural beam 8.

[0044] In one specific embodiment, if the original structural beam 6 is located at the designed position of the newly added structural wall 3, the original structural beam 6 is not removed, and the newly added structural wall 3 is connected to the original structural beam 6.

[0045] In one specific embodiment, the ends of the corresponding reinforcing bars in the newly added structural wall 3 are anchored into the newly added structural beam 8 or the original structural beam 6.

[0046] In one specific embodiment, the newly added structural wall 3 has at least one.

[0047] Preferably, there is one new structural wall 3. In this case, the design positions of the other three new structural walls 3 overlap with the positions of the original structural walls 4, so that the three original structural walls 4 can be used as new structural walls 3.

[0048] Preferably, there are two new structural walls 3. In this case, the new mezzanine structure is set at the corner of the existing structure, so that the design position of the two new structural walls 3 overlaps with the position of the original structural wall 4 at the corner, so that the two original structural walls 4 can be used as new structural walls 3.

[0049] Ideally, the newly added structural walls should have three, such as Figure 4 As shown, in this case, the design position of one of the newly added structural walls 3 overlaps with the position of the corresponding original structural wall 4, so the original structural wall 4 is used as the newly added structural wall 3.

[0050] Ideally, there are four new structural walls. In this case, the design position of the new structural wall 3 does not overlap with the original structural wall 4 at all, so the new structural wall 3 needs to be set at all four design positions.

[0051] If the position of the original structural wall 4 overlaps with the design position of the corresponding newly added structural wall 3, then the original structural wall 4 is used as the corresponding wall of the newly added mezzanine structure. When the original structural wall 4 serves as the corresponding wall for the newly added mezzanine structure, the end of the corresponding newly added structural beam 8 is connected to the original structural wall 4, and the steel bars in the newly added structural beam 8 are anchored into the original structural wall 4.

[0052] In one specific implementation, such as Figure 14 As shown, the reinforcing steel bars inside the newly added structural beam 8 include: Several spaced longitudinal reinforcement bars are distributed along the length of the newly added structural beam 8; Several stirrups, adapted to the cross-section of the newly added structural beam 8, are fitted onto several longitudinal bars; Several second tie rods are provided, the ends of which are bent into a U-shape and hooked onto the corresponding longitudinal ribs. The second tie rods are fixedly connected to the longitudinal ribs.

[0053] Specifically, such as Figure 11As shown, the end of the newly added structural beam 8 that connects to the original structural column 5 has a variable cross-section, and the cross-sectional dimension of the side of this end away from the newly added structural beam 8 is the same as the dimensions of the original structural column 5 and the outer structure 7. This ensures that the newly added structural beam 8 can uniformly apply stress to the original structural column 5 and the outer structure 7.

[0054] Preferably, in the longitudinal reinforcement inside the connection end between the newly added structural beam 8 and the original structural column 5, the longitudinal reinforcement on the outer perimeter is parallel to the inclined surface at the end, thereby creating a gap between the outer longitudinal reinforcement and the middle longitudinal reinforcement. Several reinforcing bars are arranged in this gap, which are embedded in the newly added structural beam 8 and anchored at one end into the original structural column 5.

[0055] Better, such as Figure 12 As shown, if the design height of the newly added floor slab 2 at the top of the newly added mezzanine structure is relatively low (flush with the original structural beam 6), then the corresponding newly added structural beam 8 is connected to the original structural beam 6. The ends of the longitudinal reinforcement bars inside the newly added structural beam 8 are anchored into the original structural beam 6, thereby ensuring the connection strength between the newly added structural beam 8 and the original structural beam 6.

[0056] Specifically, such as Figure 13 As shown, if the newly added structural beam 8 is connected to the original structural wall 4, the surface of the original structural wall 4 is roughened to expose the internal main reinforcement bars. The longitudinal reinforcement bars of the newly added structural beam 8 are anchored into the original structural wall 4 and fixedly connected to the main reinforcement bars of the original structural wall 4, so that the connection between the newly formed structural beam 8 and the original structural wall 4 is more solid.

[0057] Specifically, the construction of the newly added structural wall 3 is divided into three cases. For example... Figure 15 As shown, in this case, the newly added structural wall 3 is located between the original structural beam 6 and the newly added structural beam 8. The upper and lower ends of the reinforcing bars inside the newly added structural wall 3 are anchored into the newly added structural beam 8 and the original structural beam 6, respectively. Figure 16 As shown, in this case, the newly added structural wall 3 is located at the bottom of the original structural beam 6 and connected to the newly added floor slab 2 below it. The reinforcing bars inside the newly added structural wall 3 are anchored into the original structural beam 6. The third case involves the newly added structural wall 3 being placed on top of the original structural wall 4, as shown... Figures 17 to 19 As shown, the height of the newly added floor slab 2 is higher than that of the existing structural floor slab 1, which is the tallest existing structural floor slab. After the original structural floor slab 1 is removed, the newly added floor slab 2 cannot be connected to the existing structure. Therefore, a new structural wall 3 is set between the newly added floor slab 2 and the original structural wall 4 to serve as a connection. The steel bars in the new structural wall 3 are anchored into the original structural wall 4.

[0058] Specifically, the surfaces connecting the existing structure and the new mezzanine structure are roughened to expose the main reinforcement bars, facilitating the insertion of the reinforcement bars in the new mezzanine structure, and an interface agent is applied to the roughened areas.

[0059] This invention also provides a construction method for adding a sandwich structure to an existing structure, specifically including the following steps: S1: According to the design drawings, remove the original structural floor slab 1 within the design scope of the newly added mezzanine structure; S2: Construct the new floor slab 2 and the new structural beam 8, so that the steel bars inside the new floor slab 2 and the new structural beam 8 are anchored into the existing structure; S3: Construct the new structural wall 3, and anchor the steel bars inside the new structural wall 3 into the existing structure, the new floor slab 2, or the new structural beam 8, thereby completing the construction of the new mezzanine structure.

[0060] In one specific embodiment, the existing structure further includes: the original structural wall 4, the original structural column 5, and the original structural beam 6; Before step S2, the surfaces of the original structural column 5, the newly added floor slab 2 and the newly added structural beam 8 to be connected are roughened, and when laying the reinforcing bars, the ends of the reinforcing bars are anchored into the original structural column 5.

[0061] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A new mezzanine structure for an existing structure, the existing structure including an original structural floor slab (1), wherein an opening is provided on the original structural floor slab (1) at a position corresponding to the design scope of the new mezzanine structure, characterized in that, The newly added sandwich structure includes: A new floor slab (2) is provided above the opening and another new floor slab (2) is provided below the opening. Several new structural beams (8) are provided on the two new floor slabs (2). The new floor slabs (2) and the new structural beams (8) are reinforced concrete structures and are connected to the existing structure. A new structural wall (3) is provided between the two new floor slabs (2). The new structural wall (3) is located at the edge of the design range of the new mezzanine structure. The new structural wall (3) is a reinforced concrete structure. The new structural wall (3) and the new floor slabs (2) together enclose the new mezzanine space.

2. The new sandwich structure for an existing structure according to claim 1, characterized in that, The existing structure also includes: original structural walls (4), original structural columns (5) and original structural beams (6). The newly added floor slab (2) and the newly added structural beam (8) are connected to the original structural column (5) corresponding to the design range of the newly added mezzanine structure; The outer surface of the original structural column (5) connected to the newly added floor slab (2) and the newly added structural beam (8) is provided with an outer covering structure (7), and the newly added floor slab (2) and the newly added structural beam (8) are connected to the original structural column (5) through the outer covering structure (7).

3. The new sandwich structure for an existing structure according to claim 2, characterized in that, The outer structure (7) includes: The first tie bar is horizontally set and one end is anchored into the original structural column (5) and connected to the steel bar in the original structural column (5). There are several first tie bars, which are distributed in multiple layers at intervals above and below, and multiple tie bars are distributed at intervals in each layer. Multiple stirrups of different sizes are arranged around the outside of the original structural column (5) and connected to the first tie rod; Concrete is placed on the outer surface corresponding to the original structural column (5) to bury the first tie bar and the stirrup.

4. The new sandwich structure for an existing structure according to claim 2, characterized in that, The cross-sectional dimension of the newly added structural beam (8) connected to the original structural column (5) is larger than the cross-sectional dimension of the newly added structural beam (8), and the number of steel bars in the end is greater than the number of steel bars in the newly added structural beam (8).

5. The new sandwich structure for an existing structure according to claim 2, characterized in that, If the original structural beam (6) is located at the designed position of the newly added structural wall (3), the original structural beam (6) will not be removed, and the newly added structural wall (3) will be connected to the original structural beam (6).

6. The new sandwich structure for an existing structure according to claim 5, characterized in that, The ends of the corresponding steel bars in the newly added structural wall (3) are anchored into the newly added structural beam (8) or the original structural beam (6).

7. The new sandwich structure for an existing structure according to claim 2, characterized in that, The newly added structural wall (3) has at least one.

8. The new sandwich structure for an existing structure according to claim 1, characterized in that, The steel reinforcement inside the newly added structural beam (8) includes: Several longitudinal reinforcement bars are spaced apart and distributed along the length of the newly added structural beam (8); Several stirrups, adapted to the cross-section of the newly added structural beam (8), are fitted onto several longitudinal bars; Several second tie rods are provided, the ends of which are bent into a U-shape and hooked onto the corresponding longitudinal ribs. The second tie rods are fixedly connected to the longitudinal ribs.

9. A construction method for adding a new mezzanine structure to an existing structure according to claim 1, characterized in that, Specifically, the steps include the following: S1: According to the design drawings, remove the original structural floor slab (1) within the design scope of the newly added mezzanine structure; S2: Construct new floor slabs (2) and new structural beams (8) so that the steel bars inside the new floor slabs (2) and the new structural beams (8) are anchored into the existing structure; S3: Construct a new structural wall (3) so that the steel bars inside the new structural wall (3) are anchored into the existing structure or the new floor slab (2) or the new structural beam (8), thereby completing the construction of the new mezzanine structure.

10. The construction method for adding a new mezzanine structure to an existing structure according to claim 9, characterized in that, The existing structure also includes: original structural walls (4), original structural columns (5) and original structural beams (6). Before step S2, roughen the surfaces of the original structural column (5), the new floor slab (2) and the new structural beam (8) to be connected, and when laying the reinforcing bars, anchor the ends of the reinforcing bars into the original structural column (5).

Images