Overhanging and Widening Structure for Buildings and Construction Method

Abstract

The present application discloses a cantilever widening structure for a building and a construction method thereof. A base assembly is provided on the building; a bracket assembly is cooperated with the base assembly and is arranged in a cantilever structure; a connecting assembly is at least used for strengthening the bracket assembly; the base assembly at least includes a second base connected to the building; the bracket assembly at least includes a first bracket arranged on the second base; the connecting assembly at least includes a connecting member, and the connecting member is connected to two corresponding first brackets respectively installed on both sides of the building; the connecting member is a flexible connecting member or a non-flexible connecting member; the connecting member applies prestress to the first bracket. The beneficial effect of the present application is that it provides a cantilever widening structure for a building and a construction method thereof, which are convenient and fast in construction and do not additionally increase the surface layer load of the building.

Description

Technical Field

[0001] This application relates to the field of general building structures. Specifically, it relates to a cantilever broadening structure for buildings and a construction method therefor. Background Art

[0002] The cantilever structure is one of the common structural forms in engineering structures, such as the canopy, cornice, external balcony, external cantilever corridor, equipment platform, etc. in building engineering. This structure projects a beam or slab from the main structure to form a cantilever structure.

[0003] With the development of the times, the dimensional requirements for cantilever structures are getting larger and larger, especially for some cases where the installation position of the load-bearing base is limited and it is impossible to increase the size of the cantilever structure by increasing the size and load-bearing capacity of the load-bearing base; or some small-load cantilever structures that require a large size and area but have a small load requirement; or some cases where the existing cantilever structure needs to be broadened.

[0004] For example, for buildings such as viewing platforms, plank roads, bridges, cornices, external balconies, external cantilever corridors, equipment platforms, etc., with the development of society, some of the viewing platforms, plank roads, bridges, cornices, external balconies, external cantilever corridors, equipment platforms, etc. built in the past are relatively narrow in width or small in area and cannot meet the needs of people to pass through and stop, often causing congestion. However, demolishing and rebuilding not only costs huge amounts of money but also takes a long time, resulting in greater inconvenience and more impacts.

[0005] For example, a certain wetland park has a huge number of tourists on weekdays. There is only one main road in the wetland to serve tourists and merchants such as hotels and guesthouses in the scenic area. The original plank road and bridge on the main road are relatively narrow and do not have a dedicated sidewalk, becoming a congestion point in the scenic area. At the same time, the road traffic conditions in the wetland are poor and large construction equipment over 20 tons cannot pass through. In the existing technology, most are the bridge deck broadening structures and construction methods for large bridges, such as those disclosed in the application with the application number CN202410994048.2 and the name of "A Bridge Deck Widening Structure and Construction Method Suitable for Existing Bridge Structures", which mainly broaden the bridge deck and increase the bridge deck load-bearing capacity for vehicle passage; and large construction facilities are required, and the construction time is long, which is not applicable to specific environments such as scenic areas and wetlands.

[0006] For example, the cantilever structure of a balcony is an important part of a building and also an important place in people's daily life. In some communities built in the past, due to the early planning and construction era and relatively low construction standards, balconies were not built or the balconies built were relatively small, which was not convenient for the daily life of residents. In the prior art, adding or expanding a balcony usually involves a large amount of construction work or high costs. For example, in the "New Steel Structure Balcony for Existing Masonry Structure Residence and Its Construction Method" disclosed in the patent application with the application number CN202011424809.9, to add a balcony or expand the area of an existing balcony, it is necessary to first demolish the original balcony, then install scaffolding and re-erect steel beams. The amount of work is large, various large-scale construction facilities are required, and the cost is relatively high, which is not conducive to popularization.

[0007] Therefore, there is a need for a device and method to solve the above problems. Summary of the Invention

[0008] The content part of this application is used to briefly introduce concepts, which will be described in detail in the following specific implementation part. The content part of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0009] To solve the technical problems mentioned in the above background art part, some embodiments of this application propose a cantilever widening structure and construction method for buildings to solve the technical problems mentioned in the above background art part.

[0010] As a first aspect of this application, some embodiments of this application provide a cantilever widening structure for buildings, including

[0011] A base component, provided on the building;

[0012] A bracket component, cooperating with the base component and arranged in a cantilever structure;

[0013] A connection component, at least for strengthening the bracket component;

[0014] The base component at least includes a second base connected to the building; the bracket component at least includes a first bracket provided on the second base; the connection component at least includes a connecting piece, and the connecting piece is connected to two corresponding first brackets respectively installed on both sides of the building; the connecting piece is a flexible connecting piece or a non-flexible connecting piece; the connecting piece applies prestress to the first bracket.

[0015] The present application installs a base assembly on the building, so that the bracket assembly can be quickly installed on the building through the base assembly without the need for large-scale construction equipment. The installation is simple, the construction is convenient and fast, and there is no need to close the construction for a long time, which is convenient for people in the scenic area to pass through. The first brackets on both sides of the building are then connected by connecting parts, so that the pressure on the sidewalk bracket on one side of the building can be distributed to the sidewalk bracket on the other side of the building. At the same time, an upward pre-tension is applied to the first bracket, which greatly improves the load-bearing capacity and safety factor of the sidewalk.

[0016] Furthermore, the connecting member is a connecting bar or a connecting rope.

[0017] Furthermore, the second base includes a first base and a second base, and the second base at least partially cooperates with the side of the building; the first bracket includes a frame body and an extension portion provided on the frame body, the extension portion is connected to the first base, and the frame body is provided with at least a portion of the end surface on one side of the extension portion abutting against the second base.

[0018] Furthermore, the area of the second base portion on the side close to the building side is larger than the area of the end face of the frame on the side where the extension portion is provided.

[0019] Furthermore, the frame is provided with a first through hole for the connecting rope to pass through, and the second base is provided with a second through hole for the connecting rope to pass through.

[0020] Furthermore, the bracket assembly also includes a second bracket, which is connected to the first bracket on one side and to the second base on the other side; and / or the base assembly also includes a first base connected to the building, and the second base is arranged on the first base; and / or the base assembly also includes a roller arranged on the first base and cooperating with the connecting cable; and / or the connecting assembly also includes a first sleeve arranged at the first through hole and a second sleeve arranged at the surface layer of the building, and the first sleeve and the second sleeve are both arranged outside the connecting cable; and / or the connecting assembly also includes a fastener for connecting the ends of two connecting cables or for connecting the two ends of the same connecting cable.

[0021] As a second aspect of the present application, some embodiments of the present application provide a construction method, which applies the cantilever widening structure for a building as described above, and the specific steps include:

[0022] S1. Opening a mounting groove on at least one side of the surface layer of the building;

[0023] S2. Install the base assembly in the installation slot and connect it to the building;

[0024] S3, connecting the bracket assembly to the base assembly;

[0025] S4. Reinforce the bracket assembly through a connection assembly;

[0026] S5. Repeat the above steps S1 - S4 along the length direction of the building;

[0027] S6. Install a base layer and a surface layer on the bracket assembly.

[0028] Further, step S2 includes: installing the second base at the installation groove; step S3 includes: bolt - connecting the first bracket to the second base; step S4 includes: passing a connecting cable through a first through - hole formed in the first bracket and a second through - hole formed in the second base, and connecting it to the first bracket or the second base on the other side of the building.

[0029] Further, step S2 also includes:

[0030] S21. Install the first base in the installation groove and bolt - connect it to the building;

[0031] S22. Bolt - connect the second base to the first base, or bolt - connect the second base to both the first base and the building simultaneously;

[0032] Step S3 also includes: bolt - connecting the extension part on the first bracket to the second base; bolt - connecting one side of the second bracket to the first bracket and the other side of the second bracket to the second base.

[0033] Further, step S1 also includes: opening a transverse groove communicating with the installation groove along the width direction of the building on the surface layer of the building;

[0034] Step S4 also includes: when the connecting cable passes through the first through - hole, sleeving a first sleeve on the connecting cable, and placing the first sleeve in the first through - hole;

[0035] After the connecting cable passes through the second through - hole, sleeving a second sleeve on the connecting cable;

[0036] Placing the connecting cable and the second sleeve in the transverse groove;

[0037] Closing or filling the transverse groove.

[0038] The beneficial effects of the present application are as follows: A construction method for a cantilever widening structure for buildings is provided, which is convenient, fast in construction and does not additionally increase the surface load of the building. There is no need to re-assume the foundation, and the floor area will not be increased, especially suitable for the situation where the foundation load is sufficient but the area of the cantilever structure is not large enough; it avoids the problem of demolishing the old building and building a new one in the traditional treatment method, and greatly reduces the capital requirement; and it does not have to rely on large construction equipment, and only relies on manual labor and a small amount of small equipment to complete, and the cost is more controllable; the interference to the main road traffic is the lowest (for example, when adding a sidewalk to a bridge, the traffic will only be interrupted briefly when installing the cable components), ensuring all-weather passage in high-traffic areas such as scenic spots during construction, and the construction time is short, and the impact on the operation and management of the scenic spot is small. At the same time, there is no need to additionally increase the vertical load on the surface layer of the existing building, and the traditional addition of relevant facilities relies on rigid connections. The present invention adopts a flexible connection method, which reduces the pressure and damage caused by the vibration and displacement of the widening mechanism to the connectors, and makes the service life of the widening mechanism longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings forming a part of this application are used to provide a further understanding of the application, making other features, objects, and advantages of the application more apparent. The schematic embodiments and descriptions thereof of the application are used to explain the application and do not constitute an improper limitation of the application.

[0040] In addition, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements and components are not necessarily drawn to scale.

[0041] In the drawings:

[0042] Figure 1 is a schematic diagram of opening installation grooves and transverse grooves in a part of the existing building according to an embodiment of the present application;

[0043] Figure 2 is a schematic diagram of the cooperation between a cantilever widening structure for buildings and an existing building according to an embodiment of the present application;

[0044] Figure 3 is a three-dimensional schematic diagram of a cantilever widening structure for buildings according to an embodiment of the present application;

[0045] Figure 4 is Figure 3 an enlarged schematic diagram of part A in the shown cantilever widening structure for buildings;

[0046] Figure 5 is a schematic diagram of the cooperation between a first foundation and an existing building according to an embodiment of the present application;

[0047] Figure 6Schematic diagram of the cooperation between the base component and the existing building according to an embodiment of the present application;

[0048] Figure 7 Schematic diagram of adding a sidewalk to a bridge according to an embodiment of the present application;

[0049] Figure 8 Schematic diagram of the force analysis of the cantilever widening structure according to an embodiment of the present application. Detailed implementation manners

[0050] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0051] In addition, it should be noted that for the sake of convenience of description, only parts related to the present application are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0052] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless clearly specified otherwise in the context, it should be understood as "one or more".

[0053] The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0054] As Figure 1 shown, the building 400 at least includes a base layer 42 and a surface layer 41 provided on the base layer 42. The surface layer 41 is an asphalt layer or a surface layer of other materials. The building 400 includes buildings and structures.

[0055] As Figures 1 to 8As shown, the cantilever widening structure for buildings disclosed in some embodiments of the present application includes a base assembly 100, a bracket assembly 200, and a connection assembly 300; the base assembly 100 includes a first base 11 and a second base 12, both made of thick steel plates and formed by welding. The first base 11 can be installed in an installation groove 43 opened on a building 400. In this embodiment, the installation groove 43 is a groove formed between the remaining surface layer 41 and the base layer 42 after removing a part of the surface layer 41 of the building 400. In other embodiments, a groove can also be further drilled in the base layer 42 to form the installation groove 43. The second base 12 is installed on the first base 11, and the second base 12 is simultaneously bolted to both the first base 11 and the building 400. In other embodiments, if the connection strength is sufficient, the second base 12 can also be only bolted or welded or otherwise connected to the first base 11, or only bolted or otherwise connected to the building 400. In this embodiment, taking the example of adding a sidewalk to an existing bridge, as Figure 7 shown. In other embodiments, the building 400 can be an existing cantilever structure such as a canopy, an observation deck, a plank road, an eave, an external balcony, an external cantilever corridor, an equipment platform, etc., and the area or width of the existing cantilever structure can be increased through the cantilever widening structure of the present application; or, the building 400 can also be a house or other building, and a cantilever structure such as a canopy, an observation deck, a plank road, an eave, an external balcony, an external cantilever corridor, an equipment platform, etc. can be added to it through the cantilever widening structure of the present application.

[0056] In some embodiments, the first base 11 includes a first base plate 111, a second base plate 112, a third base plate 113, and a fourth base plate 114. There are two second base plates 112, third base plates 113, and fourth base plates 114, which are symmetrically arranged on both sides of the first base plate 111 respectively. Among them, one end of the second base plate 112 is connected to the first base plate 111, and the other end is connected to the third base plate 113. One end of the fourth base plate 114 is connected to the third base plate 113. When the first base 11 is installed in the installation groove 43, at least part of the surface of the first base plate 111 abuts against the bottom surface of the installation groove 43, at least part of the surface of the second base plate 112 is in contact with the side surface of the installation groove 43, and at least part of the surface of the third base plate 113 is in contact with the surface layer 41.

[0057] In some embodiments, the second base 12 includes a first base portion 121 and a second base portion 122. The second base portion 122 is mounted on one side of the first base portion 121, and the two are in a "T" shape. When the second base 12 is mounted on the first base 11, at least a part of the lower surface of the first base portion 121 is in contact with the upper surfaces of two third substrates 113, and at least a part of the surface of the first base portion 121 on the side connected to the second base portion 122 is in contact with the fourth substrate 114. The second base portion 122 is located between the two third substrates 113, and at least a part of the surface of the second base portion 122 close to the building 400 is in contact with the side surface of the building 400. The second base portion 122 is connected to the side surface of the building 400 by bolts.

[0058] In some embodiments, the base assembly may also be only the second base 12, and the second base 12 is directly bolted to the building 400; alternatively, the first base 11 and the second base 12 are integrally structured.

[0059] Specifically, the bracket assembly 200 includes a first bracket 21 and a second bracket 22, and the second bracket 22 is made of an unequal-angle steel. The first bracket 21 is bolted to the second base 12. One side of the second bracket 22 is bolted to the first bracket 21, and the other side is bolted to the second base 12, and the three are arranged in a right triangle structure. The first bracket 21 includes a frame body 211 and an extension portion 212. The frame body 211 is arranged in a hollow cuboid structure and is made of a square steel pipe. The extension portion 212 is formed by extending at least a part of the surface of the upper part of the end surface of the frame body 211 outward (or by cutting off the part below the upper edge of one end of the frame body 211). When the first bracket 21 is bolted to the second base 12, at least a part of the lower surface of the extension portion 212 is in contact with the upper surface of the first base portion 121 (and in this embodiment, the extension portion 212 on the first bracket 21 is bolted to the first base portion 121 on the second base 12), and at least a part of the end surface of the end of the frame body 211 provided with the extension portion 212 is in contact with the second base portion 122. The surface area of the side of the second base portion 122 in contact with the building 400 is larger than the surface area of the end surface of the side of the frame body 211 provided with the extension portion 212.

[0060] In some embodiments, the connection assembly 300 includes a first sleeve 31, a second sleeve 32, a connecting member 33, and a fastener 34; the connecting member 33 is a connecting cable, which is a steel cable in this embodiment; a first through hole 2110 is formed in the frame body 211, and the first sleeve 31 is installed in the first through hole 2110; a second through hole 1220 is formed in the second base 122, a steel cable box 13 is formed between the first base 11 and the second base 12, a roller 14 is arranged on the first base 11, and the roller 14 is located in the steel cable box 13; the connecting member 33 passes through the first through hole 2110 from inside the first sleeve 31, so that the first sleeve 31 plays a role in protecting the connecting member 33, and then passes through the second through hole 1220 and the steel cable box 13 and then penetrates into the second sleeve 32. Finally, the connecting member 33 passing through the frame body 211 on one side of the building 400 and the connecting member 33 passing through the frame body 211 on the other side of the building 400 are connected and fixed by the fastener 34, so that the two ends of the two connecting members 33 are respectively clamped and connected together (in other embodiments, it can also be that one connecting member 33 passes through the frame bodies 211 on both sides of the building 400 and then the two ends are connected and fixed by the fastener 34, with the head and tail connected); the second sleeve 32 is placed in a transverse groove 44 formed in the surface layer 41, which plays a role in protecting the connecting member 33 and at the same time allows the steel cable to have a certain movement space in the second sleeve 32; the part of the connecting member 33 in the steel cable box 13 is placed on the roller 14, and the roller 14 plays a role in supporting, sliding, and protecting the connecting member 33 (steel cable).

[0061] In other embodiments, the connection assembly 300 can also be only the connecting member 33, and the connecting member 33 can be a connecting cable or a connecting bar; when it is only a connecting cable, the two ends of one connecting member 33 can be respectively connected and fixed to the frame bodies 211 on both sides of the building 400; when it is only a connecting bar, the connecting bar can be made of a steel bar or other materials, and the two ends of the connecting bar are directly welded or bolted to the second bases 12 on both sides of the building 400 respectively, or the two ends of the connecting bar are directly bolted to the frame bodies 211 on both sides of the building 400 respectively; preferably, the cross section of the connecting bar is arranged in a "T" - shaped structure.

[0062] In some embodiments of the present application, the disclosed construction method applies the above - mentioned overhanging and widening structure for buildings, and the specific construction steps include:

[0063] S1. Pretreatment of the surface layer 41; specifically, it includes the following steps:

[0064] S11. Demolish the guardrail on the side of the building 400 that needs to be widened (if both sides need to be widened, then demolish the guardrails on both sides; or, according to the widening plan, the guardrail can also be retained), and clean the surface layer 41;

[0065] S12. Open an installation groove 43 on at least one side of the surface layer 41, and open a transverse groove 44 communicating with the installation groove 43 on the surface layer 41 along the width direction of the building 400. In this embodiment, a 60 mm wide and 80 mm deep transverse through - slot is opened in the original bridge asphalt surface layer by using an angle grinder and a breaker in cooperation on the surface layer 41. At both ends of the through - slot at the bridge edge, the edge asphalt is removed to form a 280x140x100 groove.

[0066] S2. Install the base assembly 100 at the installation groove 43 to connect with the building 400. Specifically, it includes the following detailed steps:

[0067] S21. Install the first base 11 in the installation groove 43 and connect it to the building 400 by bolts. In this embodiment, expansion bolts are used to realize the connection between the first base 11 and the building 400.

[0068] S22. Connect the second base 12 to the first base 11 by bolts, forming a cavity therebetween, which is the cable box 13; or connect the second base 12 to both the first base 11 and the building 400 by bolts.

[0069] S3. Connect the bracket assembly 200 to the base assembly 100. Specifically, it includes the following steps:

[0070] S31. Connect the extension part 212 on the first bracket 21 to the second base 12 by bolts.

[0071] S32. Connect one side of the second bracket 22 to the first bracket 21 by bolts, and connect the other side of the second bracket 22 to the second base 12 by bolts.

[0072] Or, first connect the first bracket 21 and the second bracket 22 by bolts, and then connect the first bracket 21 and the second bracket 22 to the second base 12 respectively by bolts.

[0073] S4. Reinforce the bracket assembly through the connection assembly. Specifically, it includes the following steps:

[0074] S41. Install the first sleeve 31 in the first through - hole 2110 on the frame body 211, and place the second sleeve 32 into the installation groove 43.

[0075] S42. Pass the connecting piece 33 through the first sleeve 31, then through the second through - hole 1220 on the second base 12 and into the cable box 13, then pass over the roller 14, penetrate into the second sleeve 32, and connect and fix it with the connecting piece 33 on the other side of the building 400 through the fastener 34.

[0076] In other embodiments, after the connecting piece 33 passes out of the cable box 13, the second sleeve 32 can also be sleeved outside the connecting piece 33 and then the second sleeve 32 is placed into the installation groove 43.

[0077] In other embodiments, one end of the connecting member 33 can also pass through the first through hole 2110, the second through hole 1220, and the cable box 13 on the other side of the building 400, and then be fixedly connected to the other end of the connecting member 33.

[0078] In other embodiments, when only a sidewalk needs to be added on one side of the building 400, the length of the first bracket 21 on the other side of the building 400 can be shortened to reduce the occupied space while sharing the force for the side where the sidewalk is added; alternatively, the first bracket 21 on the side where the sidewalk is not added can be directly discarded, and the connecting member 33 on the side where the sidewalk is added can be directly connected to the second base 12 on the other side.

[0079] After that, use asphalt to bury the second sleeve and the steel cable (connecting member 33) into the surface layer 41 to protect the device.

[0080] In other embodiments, the installation groove 43 can also be closed with steel plates or other materials.

[0081] In other embodiments, after all the connecting members 33 on the building 400 are placed in the installation groove 43, all the installation grooves 43 can be uniformly closed or filled.

[0082] S5. Repeat the above steps S1 - S4 along the length direction of the existing building; complete the installation of the remaining cantilever widening structures for the building, and the distance between each group of mechanisms does not exceed the preset distance, which is 2m in this embodiment.

[0083] S6. Install the widened surface layer on the bracket assembly; specifically, it includes the following steps:

[0084] S61. Lay channel steel along the length direction of the building 400 (the direction of spanning the river) on the bracket assembly 200 as the installation base for the widened surface layer of the existing building.

[0085] S62. Install the surface layer (wood deck) and install the handrail.

[0086] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A cantilever widening structure for construction, characterized in that: including a base assembly, which is installed on a building; a bracket assembly, which is matched with the base assembly and is arranged in a cantilever structure; a connection assembly, which is at least used to reinforce the bracket assembly; the connection assembly is arranged on the building surface layer; the base assembly at least includes a second base connected to the building, and the second base is installed on both sides of the building surface layer; the bracket assembly at least includes a first bracket arranged on the second base; the connection assembly at least includes a connecting piece, and the connecting piece is connected to two mutually corresponding first brackets respectively installed on both sides of the building; the connecting piece is a flexible connecting piece or a non-flexible connecting piece; the connecting piece applies an upward prestress to the first bracket.

2. The cantilever widening structure for construction according to claim 1, characterized in that: The connecting piece is a connecting cable or a connecting bar.

3. The cantilever widening structure for buildings according to claim 2, characterized in that: The second base includes a first base part and a second base part, and at least part of the second base part is matched with the side surface of the building; the first bracket includes a frame body and an extension part arranged on the frame body, the extension part is connected to the first base part, and at least part of the end surface of the frame body on the side where the extension part is arranged abuts against the second base part.

4. The cantilever widening structure for construction according to claim 3, characterized in that: The area of the second base part on the side close to the building side surface is larger than the area of the end surface of the frame body on the side where the extension part is arranged.

5. The cantilever widening structure for buildings according to claim 4, characterized in that: A first through hole for the connecting cable to pass through is arranged on the frame body, and a second through hole for the connecting cable to pass through is arranged on the second base part.

6. The cantilever widening structure for construction according to claim 5, characterized in that: The bracket assembly further includes a second bracket, one side of the second bracket is connected to the first bracket, and the other side is connected to the second base part; and / or the base assembly further includes a first base connected to the building and a roller arranged on the first base and matched with the connecting cable, and the second base is arranged on the first base; and / or the connection assembly further includes a first sleeve arranged at the first through hole and a second sleeve arranged at the building surface layer, and both the first sleeve and the second sleeve are sleeved outside the connecting cable; and / or the connection assembly further includes a fastener for connecting the ends of two connecting cables or for connecting the two ends of the same connecting cable.

7. A construction method, characterized in that: Applying the cantilever widening structure for a building according to any one of claims 1-6, the specific steps include: S1. Open an installation groove on at least one side of the building surface layer; S2. Install the base assembly at the installation groove and connect it to the building; S3. Connect the bracket assembly to the base assembly; S4. Reinforce the bracket assembly through the connection assembly; S5. Repeat the above steps S1-S4 along the length direction of the building; S6. Install a base course and a surface course on the bracket assembly.

8. According to the construction method of claim 7, characterized in that: S2 includes: installing the second base at the installation groove; S3 includes: bolt-connecting the first bracket to the second base; S4 includes: passing the connecting cable through the first through hole opened on the first bracket and the second through hole opened on the second base part, and connecting it to the first bracket or the second base part on the other side of the building.

9. The construction method according to claim 8, characterized in that: S2 further includes: S21. Install the first base in the installation groove and bolt-connect it to the building; S22. Bolt-connect the second base to the first base, or bolt-connect the second base to the first base and the building simultaneously; S3 further includes: bolting the extension part on the first bracket to the second base; bolting one side of the second bracket to the first bracket and bolting the other side of the second bracket to the second base.

10. The construction method according to claim 7 or 8, characterized in that: S1 further includes: opening a transverse groove communicating with the installation groove along the width direction of the building on the surface layer of the building; S4 further includes: when the connecting cable passes through the first through hole, sleeving a first sleeve on the connecting cable, and placing the first sleeve in the first through hole; After the connecting cable passes through the second through hole, sleeving a second sleeve on the connecting cable; Placing the connecting cable and the second sleeve in the transverse groove; Closing or filling the transverse groove.

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