Connecting structure of existing building and newly-built building and construction method thereof

Abstract

This application relates to the technical field of connecting old and new buildings, and in particular to a connection structure and construction method for an existing building and a new building, including existing components, new components, and connecting components. The existing components include an exterior wall and a floor slab, with the floor slab fixedly connected to the exterior wall. The new components are located on one side of the existing components and include a roof and a supporting wall. The roof and the floor slab are on the same horizontal plane, and the supporting wall is located at the bottom of the roof. The connecting components include connecting steel bars and supporting steel bars. One end of the connecting steel bar is fixedly connected to the floor slab, and the other end extends through the exterior wall and is fixedly connected to the roof. One end of the supporting steel bar is fixedly connected to the roof, and the other end abuts against the exterior wall. The connecting steel bars between the roof and the floor slab share the overturning force of the existing components, while the supporting steel bars increase the contact area between the roof and the supporting wall. This application has the effect of dispersing the local stress at the connection point of the connecting steel bars between the existing and new components.

Description

Technical Field

[0001] This application relates to the technical field of connecting old and new buildings, and in particular to a connection structure between an existing building and a new building and its construction method. Background Technology

[0002] With social development and the improvement of people's living standards, the requirements for the functionality and comfort of buildings are constantly increasing. Since buildings have a limited lifespan, regular maintenance and renovation are necessary to extend their service life.

[0003] Currently, in the process of modifying existing components, adding auxiliary structures refers to adding new structures, such as support systems and buffer systems, to the original building to improve its performance and safety. The new structures typically involve adding steel reinforcement to the compression or tension zones of the original components for connection.

[0004] Regarding the aforementioned technologies, adding a new structure that relies solely on the support of steel reinforcement can easily lead to localized stress concentration in existing components, causing cracks to easily appear at the joints. Summary of the Invention

[0005] In order to disperse the local stress at the connection of existing components, this application provides a connection structure between an existing building and a new building and its construction method.

[0006] The technical solution for the connection structure between an existing building and a new building provided in this application is as follows:

[0007] A connection structure between an existing building and a new building, comprising:

[0008] Existing components include exterior walls and floor decking, with the floor decking fixedly connected to the exterior walls;

[0009] A new component is located on one side of the existing component. The new component includes a roof and a supporting wall. The roof and the floor slab are located on the same horizontal plane, and the supporting wall is located at the bottom of the roof.

[0010] The connecting assembly includes connecting steel bars and supporting steel bars. One end of the connecting steel bar is fixedly connected to the floor deck, and the other end extends through the exterior wall and is fixedly connected to the roof. One end of the supporting steel bar is fixedly connected to the roof, and the other end abuts against the exterior wall.

[0011] By adopting the above technical solution, the newly built components are positioned in the direction in which the existing components are about to tilt, and the roof is connected to the floor deck through connecting components.

[0012] The roof and floor slab are connected by reinforcing bars, which allows the roof and supporting walls to share the overturning force of the existing components. At the same time, the reinforcing bars are used to increase the contact area between the roof and the supporting walls, and to disperse the local stress at the connection point of the reinforcing bars between the existing and new components, thereby reducing the possibility of damage at the connection point.

[0013] Optionally, the end of the connecting steel bar near the newly constructed component is hinged to one end of the supporting steel bar.

[0014] By adopting the above technical solution, the connecting steel bars and supporting steel bars are integrated into one unit, which facilitates the installation of the connecting steel bars and supporting steel bars during construction.

[0015] Optionally, the connecting steel bar has a rotating hole, one end of the supporting steel bar is fixedly connected to a rotating rod, the rotating rod is inserted into the rotating hole, and the other end of the supporting steel bar is hinged to an abutment plate, the abutment plate being used to abut against the outer wall.

[0016] By adopting the above technical solution, the hinge connection between the connecting steel bars and the supporting steel bars is completed by using the cooperation of the rotating hole and the rotating rod, and the contact area between the supporting steel bars and the outer wall is increased by using the hinged abutment plate.

[0017] Optionally, the roof is provided with slab reinforcement, the lower side of the slab reinforcement is fixedly connected to the connecting reinforcement, the upper side of the slab reinforcement is fixedly connected to the supporting reinforcement, the rotating hole is an oblong hole, the length direction of the rotating hole is parallel to the length direction of the connecting reinforcement, and the rotating rod can slide in the rotating hole along the length direction of the rotating hole.

[0018] By adopting the above technical solution, in order to make the connection between the connecting steel bars, supporting steel bars and the roof more tightly, the connecting steel bars and supporting steel bars are connected to the roof slab reinforcement. However, because the insertion depth of the connecting steel bars into the floor slab is inconsistent, the distance between the hinged connection of the connecting steel bars and the external wall is easily inconsistent, resulting in different inclination angles of the supporting steel bars. This causes the supporting steel bars on the same floor level to be out of alignment, making it difficult to fix the supporting steel bars to the upper side of the slab reinforcement.

[0019] Therefore, by setting the rotating hole as a waist-shaped hole, the hinge point of the connecting steel bar and the supporting steel bar can be adjusted, thereby keeping the inclination angle of the supporting steel bar consistent. This results in the supporting steel bars on the same height layer being on the same straight line, which facilitates the fixed connection between the supporting steel bar and the upper side of the slab reinforcement.

[0020] Optionally, an adjusting component is installed on the connecting steel bar, the adjusting component being used to adjust the position of the rotating rod in the rotating hole.

[0021] By adopting the above technical solution, the setting of the adjusting component facilitates the adjustment of the position of the rotating rod, thereby facilitating the adjustment of the hinge point position of the connecting steel bar and the supporting steel bar, so that the distance between the connecting steel bar hinged to the supporting steel bar and the outer wall is consistent.

[0022] Optionally, the adjusting component includes an adjusting bolt, and a bolt hole is provided at the end of the connecting steel bar away from the floor deck. The bolt hole communicates with the rotating hole, and the adjusting bolt is threaded into the bolt hole.

[0023] By adopting the above technical solution, the adjusting bolt is rotated to control the length of the adjusting bolt in the rotating hole, so that the adjusting bolt abuts against the supporting steel bar, thereby adjusting the position of the rotating rod.

[0024] Optionally, a locking plate is rotatably connected to one end of the adjusting bolt near the rotating rod, and limit rods extend from both ends of the locking plate, with the limit rods passing through the rotating hole.

[0025] By adopting the above technical solution and setting the limit rod, the locking plate becomes more stable during the sliding process.

[0026] Optionally, the locking plate has an abutting arc surface at one end near the supporting steel bar, and the abutting arc surface is a concave surface.

[0027] By adopting the above technical solution, the arc surface of the abutment surface makes the abutment area between the abutment plate and the end of the supporting steel bar larger, thereby making the abutment plate more stable when abutting the end of the supporting steel bar.

[0028] This application also discloses a construction method for existing and new buildings, including:

[0029] Positioning: Mark the location on the exterior wall of the existing structure at the same level as the floor decking.

[0030] Drill holes at the marked locations to create anchor holes for the rebar;

[0031] Install the reinforcing bars, insert the connecting reinforcing bars into the anchor holes, connect one end of the supporting reinforcing bar to the connecting reinforcing bar, and abut the other end against the outer wall;

[0032] The process involves pouring concrete into the supporting walls and roof, ensuring that the connecting and supporting reinforcing bars are located within the roof structure.

[0033] By adopting the above technical solution, the construction of the new component is completed through positioning, drilling, installing steel bars, and pouring concrete.

[0034] Mark the sections of the existing structural member's exterior wall where reinforcement bars will be inserted. The marks should be evenly spaced and level with the floor slab. Drill holes at the marked locations to extend the depth of the holes into the floor slab. Insert one end of the connecting reinforcement bar into the hole and fix the other end to the supporting reinforcement bar. Fix one end of the supporting reinforcement bar to the supporting reinforcement bar and abut against the exterior wall. Then, use the connecting and supporting reinforcement bars to pour the supporting wall and roof, ensuring that the connecting and supporting reinforcement bars are completely within the roof.

[0035] Optional, slab reinforcement bars can be provided;

[0036] Installing reinforcing bars also includes tying the bottom of the connecting reinforcing bars to the slab reinforcement with wire, and tying the supporting reinforcing bars to the slab reinforcement with wire.

[0037] By adopting the above technical solution, both the connecting steel bars and the supporting steel bars are fixedly connected to the slab reinforcement, making the support of the roof and supporting walls to the external walls and floor slabs more stable.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. By coordinating the exterior walls, floor decks, roof, supporting walls, connecting steel bars, and supporting steel bars, the roof and supporting walls are positioned to indicate the direction in which the exterior walls will tilt. The roof and floor decks are fixedly connected by connecting steel bars, allowing the roof and supporting walls to share the overturning force of the exterior walls and floor decks. At the same time, the supporting steel bars are used to increase the contact area between the roof and supporting walls, dispersing the local stress at the connection points of the existing and new components, thereby reducing the possibility of damage at the connection points.

[0040] 2. By combining connecting steel bars, supporting steel bars, slab reinforcement, rotating rods, and making the rotating holes slotted, the hinge points of the connecting steel bars and supporting steel bars are adjustable. This controls the distance between the connection points of all connecting components and the supporting steel bars and the external wall to remain consistent, ensuring that the inclination angles of the supporting steel bars are consistent. This ensures that the supporting steel bars on the same level are on the same straight line, thereby facilitating the fixed connection between the supporting steel bars and the upper side of the slab reinforcement.

[0041] 3. By coordinating the connecting steel bars, supporting steel bars, rotating holes, adjusting bolts, locking plates, limiting rods, and abutting arc surfaces, the position of the locking plate within the rotating hole is adjusted by rotating the adjusting bolts, causing the supporting steel bars to abut against the abutting arc surface of the locking plate. This, in turn, adjusts the position of the rotating rod within the rotating hole, thereby achieving the effect of adjusting the distance between the supporting steel bar connection point (hinged with the connecting steel bars) and the outer wall. Attached Figure Description

[0042] Figure 1This is a schematic diagram of a connection structure between an existing building and a newly constructed building in an embodiment of this application.

[0043] Figure 2 This is a structural schematic diagram of the existing components, connecting assemblies, and rib reinforcement in the embodiments of this application.

[0044] Figure 3 This is a schematic diagram of the structure of the connecting component in an embodiment of this application.

[0045] Figure 4 This is a schematic diagram of the structure of the adjusting component in the embodiments of this application.

[0046] Figure 5 This is a schematic flowchart illustrating a construction method for existing and new buildings in an embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Existing components; 11. Exterior wall; 12. Floor deck; 2. New components; 21. Roof; 22. Supporting wall; 23. Slab reinforcement; 3. Connecting components; 31. Connecting reinforcement; 32. Supporting reinforcement; 33. Rotating hole; 34. Rotating rod; 35. Abutment plate; 4. Adjusting components; 41. Adjusting bolt; 42. Locking plate; 43. Limiting rod; 44. Abutment arc surface. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0050] This application discloses a connection structure between an existing building and a newly constructed building.

[0051] Reference Figure 1 and Figure 2 A connection structure between an existing building and a new building includes an existing component 1, a new component 2, and a connecting assembly 3. The existing component 1 includes an exterior wall 11 and a floor deck 12, with the floor deck 12 fixedly connected to the exterior wall 11. The new component 2 is located to one side of the existing component 1 and includes a roof 21 and a supporting wall 22. The roof 21 and the floor deck 12 are on the same horizontal plane, and the supporting wall 22 is located at the bottom of the roof 21. The connecting assembly 3 includes connecting steel bars 31 and supporting steel bars 32. One end of the connecting steel bar 31 is fixedly connected to the floor deck 12, and the other end extends through the exterior wall 11 and is fixedly connected to the roof 21. One end of the supporting steel bar 32 is fixedly connected to the roof 21, and the other end abuts against the exterior wall 11.

[0052] By utilizing the connecting steel bars 31 between the roof 21 and the floor deck 12, the roof 21 and the supporting wall 22 can share the overturning force of the existing component 1. At the same time, the supporting steel bars 32 are used to increase the contact area between the roof 21 and the supporting wall 22, so that the local stress at the connection of the connecting steel bars 31 between the existing component 1 and the new component 2 is dispersed, thereby reducing the possibility of damage at the connection between the connecting steel bars 31 and the existing component 1, or reducing the possibility of damage at the connection between the connecting steel bars 31 and the roof 21.

[0053] The existing component 1 can be a low-rise or multi-story building. In this embodiment, the existing building is a low-rise building with three floors. The newly constructed component 2 can be built as a garage or storage room. By constructing the new component 2 on the side of the existing component 1 that is about to tilt, the existing component 1 can be supported, extending its service life. At the same time, the structure of the new component 2 can be utilized, avoiding the disadvantage of the new component 2 occupying space, thus turning disadvantage into advantage.

[0054] In an optional embodiment, the end of the connecting steel bar 31 closest to the newly constructed component 2 is hinged to one end of the supporting steel bar 32. This allows the installation of the connecting steel bar 31 and the supporting steel bar 32 to be completed simply by inserting the connecting steel bar 31 into the floor deck 12 and then rotating the supporting steel bar 32. This avoids the need to weld the supporting steel bar 32 after installing the connecting steel bar 31, making the installation of the connecting component 3 much simpler.

[0055] By integrating the connecting steel bar 31 with the supporting steel bar 32, it is easier to install the connecting component 3 during construction.

[0056] Reference Figure 3 In this embodiment, the connecting steel bar 31 has a rotating hole 33 in the horizontal direction, and the rotating hole 33 is perpendicular to the length direction of the connecting steel bar 31. The supporting steel bar 32 has a rotating rod 34 extending to both sides from one end near the connecting steel bar 31. The rotating rod 34 is fixedly connected to the supporting steel bar 32, and the rotating rod 34 is inserted into the rotating hole 33. The connecting steel bar 31 and the supporting steel bar 32 are hinged by the cooperation of the rotating hole 33 and the rotating rod 34, so that the supporting steel bar 32 can rotate around the rotating rod 34 and abut against the outer wall 11.

[0057] The end of the supporting steel bar 32 away from the connecting steel bar 31 is hinged with an abutment plate 35, which is used to abut against the outer wall 11. The hinged abutment plate 35 allows the abutment plate 35 to fit against the outer wall 11, thereby increasing the contact area between the supporting steel bar 32 and the outer wall 11, and further dispersing the local stress at the connection point of the connecting steel bar 31 between the existing component 1 and the new component 2.

[0058] The roof 21 is provided with slab reinforcement 23. In order to improve the connection effect between the roof 21 and the connecting component 3, in this embodiment, the lower side of the slab reinforcement 23 is fixedly connected to the connecting steel bar 31, and the upper side of the slab reinforcement 23 is fixedly connected to the supporting steel bar 32. By connecting the connecting component 3 with the slab reinforcement 23 structure inside the roof 21, the roof 21 and the supporting wall 22 can better bear the force with the connecting component 3, thereby making the connection between the existing component 1 and the newly built component 2 more stable.

[0059] Because the insertion depth of the connecting steel bar 31 is not uniform when it is inserted into the floor deck 12, it is easy to cause the distance between the connection point of the connecting steel bar 31 and the supporting steel bar 32 and the outer wall 11 to be inconsistent. This results in different inclination angles of the supporting steel bar 32, so that the supporting steel bars 32 located at the same height layer are not on the same horizontal plane, making it difficult to fix the supporting steel bar 32 to the upper side of the slab reinforcement 23.

[0060] In this embodiment, the rotating hole 33 is an oblong hole, and the length direction of the rotating hole 33 is parallel to the length direction of the connecting steel bar 31. The rotating rod 34 can slide within the rotating hole 33 along the length direction of the rotating hole 33. By setting the rotating hole 33 as an oblong hole, the hinge point of the connecting steel bar 31 and the supporting steel bar 32 is adjustable, and the distance between the connection point of all connecting components 3 and the supporting steel bar 32 hinged to the connecting steel bar 31 and the outer wall 11 is kept consistent. This ensures that the inclination angle of the supporting steel bars 32 is consistent, so that the supporting steel bars 32 at the same level are located on the same straight line, which facilitates the fixed connection between the supporting steel bars 32 and the upper side of the slab reinforcement 23.

[0061] To facilitate the adjustment of the position of the supporting steel bar 32 within the slotted hole, an adjusting component 4 is installed on the connecting steel bar 31. The adjusting component 4 is used to adjust the position of the rotating rod 34 within the rotating hole 33.

[0062] The position of the rotating rod 34 can be easily adjusted by using the adjusting member 4, thereby adjusting the position of the hinge point of the connecting steel bar 31 and the supporting steel bar 32, so that the distance between the connection point of the supporting steel bar 32 hinged to the connecting steel bar 31 and the outer wall 11 is consistent.

[0063] Reference Figure 3 and Figure 4 In this embodiment, the adjusting component 4 includes an adjusting bolt 41. The end of the connecting steel bar 31 away from the floor deck 12 has a bolt hole, which is connected to the rotating hole 33. The adjusting bolt 41 is threaded into the bolt hole.

[0064] By rotating the adjusting bolt 41, the length of the adjusting bolt 41 within the rotating hole 33 is controlled, so that the adjusting bolt 41 abuts against the supporting steel bar 32, thereby adjusting the position of the rotating rod 34 within the rotating hole 33.

[0065] In an optional embodiment, a locking plate 42 is rotatably connected to one end of the adjusting bolt 41 near the rotating rod 34. Limiting rods 43 extend from both ends of the locking plate 42 and pass through the rotating hole 33. The limiting rods 43 make the locking plate 42 more stable during sliding and also make the supporting steel bar 32 less prone to shaking when it abuts against the locking plate 42, thus making the abutment more stable.

[0066] The end of the supporting steel bar 32 that is hinged to the connecting steel bar 31 is set in an arc. The locking plate 42 is provided with an abutting arc surface 44 at the end near the supporting steel bar 32. The abutting arc surface 44 is concave and fits in close contact with the arc at one end of the supporting steel bar 32.

[0067] By setting the arc surface of the abutment surface, the abutment area between the abutment plate 35 and the end of the supporting steel bar 32 is larger, thereby making the abutment plate 35 more stable when abutting the end of the supporting steel bar 32.

[0068] The implementation principle of a connection structure between an existing building and a new building in this application embodiment is as follows: the existing component 1 is inspected, and the new component 2 is built in the direction in which the existing component 1 is about to tilt.

[0069] A hole is made in the exterior wall 11 and extends into the floor deck 12. The connecting steel bar 31 is inserted into the floor deck 12. Then, the adjusting bolt 41 is rotated so that the locking plates 42 in the multiple connecting steel bars 31 are on the same straight line and parallel to the exterior wall 11. The supporting steel bar 32 is rotated so that the abutment plate 35 abuts against the exterior wall 11.

[0070] Then, the lower side of the slab reinforcement 23 is fixedly connected to the connecting reinforcement 31, and the upper side of the slab reinforcement 23 is fixedly connected to the supporting reinforcement 32. Next, the roof 21 and the supporting wall 22 are poured. The roof 21 and the supporting wall 22 can share the overturning force of the existing component 1, and the supporting reinforcement 32 is used to increase the contact area between the roof 21 and the supporting wall 22, so that the local stress at the connection of the connecting reinforcement 31 between the existing component 1 and the new component 2 is dispersed, thereby reducing the possibility of damage at the connection.

[0071] This application also discloses a construction method for existing buildings and new buildings.

[0072] Reference Figure 5 A construction method for existing and new buildings includes the steps of positioning, drilling, installing steel bars, and pouring concrete.

[0073] Positioning, specifically:

[0074] The existing component 1 is inspected, and the foundation of the new component 2 is built in the direction in which the existing component 1 is about to tilt. Marks are made on the outer wall 11 on the side of the existing component 1 that is about to tilt, at the same level as the floor deck 12. The number of marks is determined according to the length of the outer wall 11 in the horizontal direction. In this embodiment, the number of marks is 5. In other embodiments, the number of marks may be 3, 6, or 10.

[0075] Drilling, specifically:

[0076] Drill holes for rebar installation vertically through the outer wall 11 at the marked location, so that the holes penetrate the outer wall 11 and extend into the floor slab 12.

[0077] The installation of reinforcing steel bars specifically involves:

[0078] Insert the connecting steel bars 31 one by one into the anchor holes, rotate the adjusting bolt 41 so that the locking plates 42 in the multiple connected steel bars 31 are on the same straight line and parallel to the outer wall 11, rotate the supporting steel bar 32 so that the abutting plate 35 abuts against the outer wall 11; provide the slab reinforcement 23, tie the connecting steel bars 31 and the lower side of the slab reinforcement 23 with iron wire, and tie the supporting steel bar 32 and the slab reinforcement 23 with iron wire.

[0079] Pouring, specifically:

[0080] The supporting wall 22 and the roof 21 are poured, and the connecting steel bars 31 and the supporting steel bars 32 are located inside the roof 21.

[0081] The implementation principle of a construction method for an existing building and a new building in this application embodiment is as follows: the existing component 1 is inspected, and the foundation of the new component 2 is built on the direction in which the existing component 1 is about to tilt, so that the foundation of the existing building and the foundation of the new building can be spliced ​​together. The foundation of the new component 2 increases the stress-bearing area of ​​the existing building foundation, thereby increasing the stability of the existing building foundation.

[0082] Five marks are made on the part of the existing component 1's outer wall 11 where the reinforcing steel is to be inserted. The marks are located on the side of the existing component 1's outer wall 11 that is about to tilt. The marks are evenly spaced and are on the same horizontal plane as the floor slab 12.

[0083] Drill anchoring holes at the marked locations, extending the depth of the anchoring holes into the floor deck 12. Then, insert the connecting steel bars 31 into the anchoring holes and rotate the adjusting bolts 41 so that the locking plates 42 in the multiple connected steel bars 31 are on the same straight line and parallel to the outer wall 11. Rotate the supporting steel bars 32 so that the abutment plate 35 abuts against the outer wall 11.

[0084] Then, the connecting steel bar 31 is tied to the lower side of the slab reinforcement 23 with wire, and the supporting steel bar 32 is tied to the slab reinforcement 23 with wire. Then, the supporting wall 22 and the roof 21 are poured, so that the connecting steel bar 31 and the supporting steel bar 32 are completely located within the roof 21.

[0085] By utilizing the foundation of the new building, the supporting wall 22, the roof 21, the connecting steel bars 31, and the supporting steel bars 32, the side of the existing component 1 that is about to tilt is supported, reducing the possibility of the existing component 1 tilting. At the same time, the supporting steel bars 32 are used to support the outer wall 11, dispersing the local stress at the connection between the existing component 1 and the connecting steel bars 31 of the new component 2, thereby reducing the possibility of damage at the connection.

[0086] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A connection structure between an existing building and a newly constructed building, characterized in that, include: The existing component (1) includes an exterior wall (11) and a floor deck (12), wherein the floor deck (12) is fixedly connected to the exterior wall (11); A new component (2) is located on one side of the existing component (1). The new component (2) includes a roof (21) and a supporting wall (22). The roof (21) and the floor deck (12) are located on the same horizontal plane. The supporting wall (22) is located at the bottom of the roof (21). The connecting component (3) includes a connecting steel bar (31) and a supporting steel bar (32). One end of the connecting steel bar (31) is fixedly connected to the floor deck (12), and the other end passes through the outer wall (11) and is fixedly connected to the roof (21). One end of the supporting steel bar (32) is fixedly connected to the roof (21), and the other end abuts against the outer wall (11). The end of the connecting steel bar (31) near the newly constructed component (2) is hinged to one end of the supporting steel bar (32). A rotating hole (33) is provided on the connecting steel bar (31). A rotating rod (34) is fixedly connected to one end of the supporting steel bar (32). The rotating rod (34) is inserted into the rotating hole (33). The other end of the supporting steel bar (32) is... The roof (21) is hinged with a connecting plate (35) for abutting against the outer wall (11); the roof (21) is provided with a reinforcing bar (23), the lower side of the reinforcing bar (23) is fixedly connected to the connecting reinforcing bar (31), the upper side of the reinforcing bar (23) is fixedly connected to the supporting reinforcing bar (32), the rotating hole (33) is a waist-shaped hole, the length direction of the rotating hole (33) is parallel to the length direction of the connecting reinforcing bar (31), and the rotating rod (34) can slide in the rotating hole (33) along the length direction of the rotating hole (33); an adjusting member (4) is installed on the connecting reinforcing bar (31), and the adjusting member (4) is used to adjust the position of the rotating rod (34) in the rotating hole (33).

2. The connection structure between an existing building and a new building according to claim 1, characterized in that: The adjusting component (4) includes an adjusting bolt (41). The connecting steel bar (31) has a bolt hole at one end away from the floor deck (12). The bolt hole is connected to the rotating hole (33). The adjusting bolt (41) is threaded into the bolt hole.

3. The connection structure between an existing building and a new building according to claim 2, characterized in that: The adjusting bolt (41) is rotatably connected to a locking plate (42) at one end near the rotating rod (34). Limiting rods (43) extend from both ends of the locking plate (42) and are inserted into the rotating hole (33).

4. The connection structure between an existing building and a new building according to claim 3, characterized in that: The locking plate (42) has an abutting arc surface (44) at one end near the supporting steel bar (32), and the abutting arc surface (44) is a concave surface.

5. A construction method for connecting an existing building to a new building, using the connection structure for connecting an existing building to a new building as described in any one of claims 1-4, characterized in that: Positioning: Mark the location on the exterior wall (11) of the existing component (1) at the same level as the floor deck (12); Drill holes at the marked locations to create anchor holes for the rebar; Install the reinforcing bars, insert the connecting reinforcing bars (31) into the anchoring holes, and connect one end of the supporting reinforcing bars (32) to the connecting reinforcing bars (31), with the other end abutting against the outer wall (11); The supporting wall (22) and the roof (21) are poured, and the connecting steel bars (31) and the supporting steel bars (32) are located inside the roof (21).

6. The construction method for existing and new buildings according to claim 5, characterized in that: Provide slab reinforcement (23); The installation of reinforcing bars also includes binding the lower side of the connecting reinforcing bar (31) and the slab reinforcement (23) with wire, and binding the supporting reinforcing bar (32) and the slab reinforcement (23) with wire.

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