Connecting structure for underground structures of existing building and newly-built building

Abstract

The utility model provides a connecting structure for underground structures of an existing building and a newly-built building, and belongs to the technical field of constructional engineering. The connecting structure comprises a first steel bar, a second steel bar, a concrete structure and a water stop bolt. The first steel bars are perpendicular to the side face of the existing building foundation bottom plate, and the two ends of each first steel bar extend into the existing building foundation bottom plate and the new building foundation bottom plate correspondingly. The second steel bar is arranged perpendicular to the upper face of the existing building foundation slab, and the two ends of the second steel bar extend into the existing building foundation slab and the new building wall correspondingly. And the concrete structure is formed by pouring concrete in the gap. The water stop bolt is perpendicular to the side face of the existing building outer wall and penetrates through the concrete structure, the water stop bolt is provided with a first end and a second end which are oppositely arranged, the first end is fixed in the existing building outer wall, and the second end is fixed in the new building wall. The connecting structure can achieve seamless connection of the new building and the old building, and the integrity of the building is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a connection structure between an existing building and an underground structure of a new building. Background Art

[0002] During the use of a building, it is often necessary to expand the building according to the specific usage situation, that is, to build a new building on the foundation of the existing building. In order to facilitate subsequent use, the existing building and the new building often need to be interconnected.

[0003] The current method for building expansion involves constructing a separate new structure adjacent to an existing one. Because the new and existing structures are two separate entities and cannot be seamlessly integrated, expansion joints are often created between the existing and new structures. Steel structural connectors, such as steel beams and columns, are then installed between the two structures. These structures are then tightly connected through welding or bolting.

[0004] In the prior art, the new and old buildings are connected by steel structures, which not only has a high construction cost, but also has poor integrity between the new and old buildings after the steel structures are connected, thereby reducing the stability of the new and old buildings after the connection. Utility Model Content

[0005] One purpose of the utility model is to solve the problem of poor integrity and stability after the new and old buildings are connected in the existing connection method of the new and old buildings.

[0006] In particular, an embodiment of the present application provides a connection structure between an existing building and an underground structure of a new building, wherein the existing building includes an existing building foundation slab and an existing building exterior wall located on the existing building foundation slab, and the new building includes a new building foundation slab and a new building wall located above the existing building foundation slab, with a gap being provided between the new building wall and the existing building exterior wall, and the connection structure includes:

[0007] a first steel bar, arranged perpendicular to a side surface of the existing building foundation slab, with two ends of the first steel bar extending into the existing building foundation slab and the new building foundation slab respectively;

[0008] A second steel bar is arranged perpendicular to the upper surface of the existing building foundation slab, with two ends of the second steel bar extending into the existing building foundation slab and the new building wall respectively;

[0009] a concrete structure formed by pouring concrete within the void;

[0010] A water stop bolt is perpendicular to the side of the existing building exterior wall and passes through the concrete structure. The water stop bolt has a first end and a second end that are relatively arranged. The first end is fixed in the existing building exterior wall, and the second end is fixed in the new building wall.

[0011] Furthermore, the first end is inserted into a preset hole on the exterior wall of the existing building, and the first end of the water stop bolt includes a rod body, and an expansion head and a plug are provided in sequence along the direction from the first end to the second end at the end of the rod body close to the wall of the existing building, and a sleeve is provided between the plug and the expansion head. The sleeve is passed through the rod body and confined in the preset hole. When the rod body moves away from the exterior wall of the existing building, the plug squeezes the sleeve to deform the sleeve and firmly press against the side wall of the hole, and fix the rod body in the preset hole.

[0012] Furthermore, the rod body is provided with an external thread, and a nut matching the external thread is provided on the side of the plug close to the new wall, so that the nut can be rotated to press the existing building exterior wall, and at the same time the rod body moves toward the new wall.

[0013] Furthermore, a gasket is provided between the nut and the exterior wall of the existing building, and the outer diameter of the gasket is larger than the diameter of the preset hole.

[0014] Furthermore, a plurality of water stop bolts are provided along the vertical direction and the horizontal direction.

[0015] Furthermore, the top and side surfaces of the existing building foundation bottom plate are rough surfaces with concave and convex surfaces.

[0016] Furthermore, the anchoring method of the steel bars is chemical anchoring.

[0017] Furthermore, an existing building bottom plate waterproofing is provided under the existing building bottom plate, and a new building waterproofing is provided under the new building bottom plate, and the existing building waterproofing is closed and connected to the new building waterproofing.

[0018] The beneficial effects of the utility model are:

[0019] 1. The existing building foundation slab is connected to the new building foundation slab as a single unit by installing a first reinforcement bar. The new building wall is connected to the existing building foundation slab as a single unit by installing a second reinforcement bar. Waterstop bolts are installed in the gap between the new building wall and the existing building exterior wall, and concrete is poured. This prevents moisture from the concrete from entering the existing building exterior wall while also connecting the existing and new building exterior walls as a single unit. By combining these measures, the existing and new buildings become a single unit, enhancing their stability after connection.

[0020] 2. The fixing method of the waterstop bolt is set to confine the waterstop bolt in the hole by the deformation of the sleeve. When the new building or the existing building tilts and moves away from each other, the waterstop bolt and the hole also move away from each other. The deformation of the expansion head increases, making the waterstop bolt more firmly confined in the confined hole, thereby enhancing the firmness of the connection between the new building and the existing building. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a connection structure between an existing building and an underground structure of a new building according to one embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a water stop bolt according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0024] In the picture:

[0025] 100-connecting structure; 1-foundation slab of existing building; 2-exterior wall of existing building; 3-foundation slab of new building; 4-wall of new building; 5-first steel bar; 6-second steel bar; 7-concrete structure; 8-gap; 9-waterstop bolt; 91-positioning structure; 92-first nut; 93-rod; 94-plug; 95-expansion head; 96-sleeve; 97-second nut; 98-gasket; 99-waterstop; 10-waterproofing of existing building slab; 11-waterproofing of new building slab. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0028] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] like Figure 1 As shown, the utility model provides a connection structure 100 between an existing building and an underground structure of a new building, wherein the existing building includes an existing building foundation slab 1 and an existing building exterior wall 2 located on the existing building foundation slab 1. The new building includes a new building foundation slab 3 and a new building wall 4 located above the existing building foundation slab 1, and a gap 8 is provided between the new building wall 4 and the existing building exterior wall 2. The connection structure 100 includes a first steel bar 5, a second steel bar 6, a concrete structure 7 and a water stop bolt 9. The first steel bar 5 is arranged perpendicular to the side of the existing building foundation slab 1, and the two ends of the first steel bar 5 extend into the existing building foundation slab 1 and the new building foundation slab 3, respectively. The second steel bar 6 is arranged perpendicular to the top of the existing building foundation slab 1, and the two ends of the second steel bar 6 extend into the existing building foundation slab 1 and the new building wall 4, respectively. The concrete structure 7 is formed by pouring concrete in the gap 8. The waterstop bolt 9 is perpendicular to the side of the existing building outer wall 2 and passes through the concrete structure 7. The waterstop bolt 9 has a first end and a second end that are relatively arranged. The first end is fixed in the existing building outer wall 2, and the second end is fixed in the new building wall 4.

[0030] The existing building foundation slab 1 and the new building foundation slab 3 are connected as a single unit by installing first reinforcement bars 5. The new building wall 4 is connected as a single unit to the existing building foundation slab 1 by installing second reinforcement bars 6. Waterstop bolts 9 are installed in the gap 8 between the new building wall 4 and the existing building exterior wall 2, and concrete is poured. This prevents moisture from the concrete from entering the existing building exterior wall 2 while maintaining the connection between the existing building exterior wall 2 and the new building wall 4. The combined use of these measures allows the existing and new buildings to become a single unit, enhancing their stability after connection.

[0031] During construction, a single-sided formwork is installed on the side of the existing building's exterior wall 2 near the new building. While the formwork is secured with waterstop bolts 9, these bolts are inserted into the existing building's exterior wall 2, with waterstop sheet 99 confined within gap 8. Concrete is then poured between the single-sided formwork and the existing building's wall. After the formwork is removed, the positioning structure 91 and first nut 92 at the second end of waterstop bolt 9 are removed. During the pouring of the new building's wall 4, rod 93 is cast within the new building's wall 4. Waterstop bolts 9 also serve as reinforcement between the new and existing structures.

[0032] Regarding the fixing method of the water stop bolt 9 on the existing building outer wall 2, a hole is opened on the existing building outer wall 2, and the first end is inserted into the hole. In order to facilitate the fixing of the water stop bolt 9 on the existing building outer wall 2, in one embodiment, as shown in FIG. Figure 2 As shown, the first end of the water stop bolt 9 includes a rod body 93, and a plug 94 and an expansion head 95 are sequentially provided on the rod body 93 in the direction close to the existing building wall. A sleeve 96 is provided between the plug 94 and the expansion head 95. The sleeve 96 is passed through the rod body 93 and confined in a predetermined hole. When the rod body 93 moves in a direction away from the existing building exterior wall 2, the plug 94 squeezes the sleeve 96, causing the sleeve 96 to deform and firmly press against the side wall of the hole, thereby fixing the rod body 93 in the predetermined hole. With the above arrangement, when the new building or the existing building tilts and moves away from each other, the water stop bolt 9 and the hole also move away from each other, and the deformation of the expansion head 95 increases, so that the water stop bolt 9 is more firmly fixed in the defined hole, thereby enhancing the firmness of the connection between the new building and the existing building.

[0033] To more conveniently secure the waterstop bolt 9 in the hole, in one embodiment, the rod 93 is provided with external threads. A second nut 97, which mates with the external threads, is located on the side of the plug 94 proximal to the new wall. By rotating the second nut 97, the nut 97 presses against the existing building's exterior wall 2 while the rod 93 moves toward the new wall. During construction, the second nut 97 can be rotated with a wrench to secure the waterstop bolt 9 in the hole, making it easier to secure the waterstop bolt 9. When the outer diameter of the second nut 97 is less than or equal to the hole's diameter, a washer 98 is positioned between the second nut 97 and the existing building's exterior wall 2. The outer diameter of the washer 98 is larger than the intended hole's diameter. Rotating the second nut 97 with a wrench compresses the washer 98, which in turn compresses the existing building's exterior wall 2. During construction, the appropriate washer 98 can be selected based on the specific hole's conditions, eliminating the need to replace the second nut 97 or the waterstop bolt 9, thus enhancing the adaptability of the waterstop bolt 9.

[0034] In one embodiment, multiple water stop bolts 9 are provided in the vertical and horizontal directions, further enhancing the stability of the connection between the existing building and the new building.

[0035] In one embodiment, the top and sides of the existing building foundation slab 1 are roughened to create a rough surface with uneven surfaces. This roughening not only removes loose layers and dust from the old concrete layer, but also increases the load-bearing area, strengthening the bond between the buildings. In one embodiment, the maximum height difference of the rough surface is no less than 20 mm.

[0036] To facilitate construction, in one embodiment, the steel bars are anchored by chemical anchoring.

[0037] In order to further enhance the integrity between the new building and the existing building, in one embodiment, the existing building floor waterproofing 10 provided under the existing building floor is closed and connected with the new building floor waterproofing 11 provided under the new building floor.

[0038] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A connecting structure between an existing building and an underground structure of a new building, wherein the existing building comprises an existing building foundation slab and an existing building exterior wall located on the existing building foundation slab, and the new building comprises a new building foundation slab and a new building wall located above the existing building foundation slab, wherein a gap is provided between the new building wall and the existing building exterior wall, characterized in that: The connection structure includes: a first steel bar, arranged perpendicular to a side surface of the existing building foundation slab, with two ends of the first steel bar extending into the existing building foundation slab and the new building foundation slab respectively; A second steel bar is arranged perpendicular to the upper surface of the existing building foundation slab, with two ends of the second steel bar extending into the existing building foundation slab and the new building wall respectively; a concrete structure formed by pouring concrete within the void; A water stop bolt is perpendicular to the side of the existing building exterior wall and passes through the concrete structure. The water stop bolt has a first end and a second end that are relatively arranged. The first end is fixed in the existing building exterior wall, and the second end is fixed in the new building wall.

2. The connection structure between an existing building and an underground structure of a new building according to claim 1, characterized in that: The first end is inserted into a preset hole on the exterior wall of the existing building. The first end of the waterstop bolt includes a rod body. An expansion head and a plug are provided in sequence along the direction from the first end to the second end of the rod body close to the wall of the existing building. A sleeve is provided between the plug and the expansion head. The sleeve is passed through the rod body and confined in the preset hole. When the rod body moves away from the exterior wall of the existing building, the plug squeezes the sleeve to deform the sleeve and firmly press against the side wall of the hole, thereby fixing the rod body in the preset hole.

3. The connection structure between an existing building and an underground structure of a new building according to claim 2, characterized in that: The rod body is provided with an external thread, and a nut matching the external thread is provided on the side of the plug close to the new building wall, so that the nut can be rotated to press the existing building exterior wall, and at the same time the rod body moves in the direction close to the new building wall.

4. The connection structure between an existing building and an underground structure of a new building according to claim 3, characterized in that: A gasket is provided between the nut and the exterior wall of the existing building, and the outer diameter of the gasket is larger than the diameter of the preset hole.

5. The connection structure between an existing building and an underground structure of a new building according to claim 1, characterized in that: A plurality of water stop bolts are arranged along the vertical direction and the horizontal direction.

6. The connection structure between an existing building and an underground structure of a new building according to claim 1, characterized in that: The upper surface and side surfaces of the existing building foundation bottom plate are rough surfaces with concave and convex shapes.

7. The connection structure between an existing building and an underground structure of a new building according to any one of claims 1 to 6, characterized in that: The anchoring method of the steel bar is chemical anchoring.

8. The connection structure between an existing building and an underground structure of a new building according to claim 7, characterized in that: An existing building bottom plate waterproofing is provided under the existing building foundation bottom plate, and a new building waterproofing is provided under the new building foundation bottom plate. The existing building waterproofing is closed and connected to the new building waterproofing.

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