In-building demolition method for multi-story concrete frame

Abstract

The present application relates to the technical field of construction engineering, and discloses an in-building demolition method for a multi-story concrete frame, applied to demolition of a multi-story concrete frame having an atrium. The multi-story concrete frame comprises a ground-floor structure and a plurality of upper-level structures sequentially arranged on the ground-floor structure. The plurality of upper-level structures are sequentially numbered as 1, 2, ..., N-1, and N from bottom to top. The in-building demolition method comprises the following steps: forming, in the multi-story concrete frame, a passage communicated with an atrium, and moving long-reach hydraulic shears in a folded state through the passage into the atrium; switching the long-reach hydraulic shears from the folded state to an unfolded state, so that shearing portions of the long-reach hydraulic shears are aligned with the upper-level structure numbered as N, moving the long-reach hydraulic shears within the atrium to demolish the upper-level structure numbered as N, and repeating this step until the upper-level structure numbered as 1 is demolished; and using a wire saw to cut the ground-floor structure for demolition. The present application can achieve low-noise and low-pollution demolition effects.

Description

A method for demolishing a multi-story concrete frame building.

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510109145.3, filed on January 23, 2025, entitled "A Method for Demolition of a Multi-Story Concrete Frame Building", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of building engineering technology, specifically to a method for demolishing a multi-story concrete frame building. Background Technology

[0004] As urban populations increase and urban land resources become increasingly scarce, there is a growing need to renovate older buildings. Some buildings that do not conform to new urban planning need to be demolished, and a very high percentage of these buildings are either under ten stories or over three stories (such as apartment buildings and hotels).

[0005] After the protective removal of furniture, doors, lighting fixtures, bathroom facilities, artwork, decoration materials, glass railings, etc., the remaining main structure of a house is mostly a concrete frame structure. Currently, most demolition of the concrete frame structure of a house is carried out outdoors, using engineering machinery to apply pressure or shear force to the concrete frame from the outside of the building to achieve the purpose of demolition. However, the fragments of the wall removed by this method are prone to falling and hitting the surrounding buildings, and generating a lot of dust outside the building. In other words, the above demolition method has the drawbacks of high requirements for the construction site conditions and a significant impact on the surrounding environment. Summary of the Invention

[0006] In view of this, this application provides a method for demolishing a multi-story concrete frame building inside the building, in order to solve the problems that existing demolition methods have high requirements for construction site conditions and have a significant impact on the surrounding environment.

[0007] This application provides a method for demolishing a multi-story concrete frame structure within a building, applicable to the demolition of a multi-story concrete frame structure with an atrium. The multi-story concrete frame structure includes a bottom structure and multiple high-rise structures sequentially arranged on the bottom structure. The multiple high-rise structures are numbered 1, 2...N-1, N from bottom to top. The method for demolishing the building within the building includes the following steps:

[0008] A passage connecting to the atrium is opened at the lower end of the multi-story concrete frame, and an extended-arm hydraulic shear in a folded state is passed through the passage into the atrium;

[0009] Switch the extended arm hydraulic shears from the folded state to the unfolded state so that the shearing part of the extended arm hydraulic shears corresponds to the high-rise structure numbered N, and move the extended arm hydraulic shears in the atrium to dismantle the high-rise structure numbered N;

[0010] After the demolition of the high-rise structure numbered N is completed, the position of the shearing part of the extended arm hydraulic shear is lowered to correspond with the high-rise structure numbered N-1, and the extended arm hydraulic shear is moved in the atrium to demolish the high-rise structure numbered N-1; this step is repeated until the high-rise structure numbered 1 is demolished;

[0011] The underlying structure was dismantled using a wire saw.

[0012] The method for demolishing multi-story concrete frames according to this application has at least the following beneficial effects:

[0013] By first creating a passageway connecting to the atrium at the lower end of the multi-story concrete frame, the folded extended-arm hydraulic shears can pass through the passageway into the atrium. The atrium provides space for the extended-arm hydraulic shears to unfold and move, allowing them to move flexibly, transfer, and rise and fall within the atrium. This enables the demolition of the high-rise structure from top to bottom while keeping the extended-arm hydraulic shears inside the multi-story concrete frame, thereby achieving the demolition of most of the multi-story concrete frame inside the building. This reduces the amount of dust and noise that spreads to the outside environment, and the demolished wall fragments mostly fall inside the building, achieving low noise, low pollution, and low requirements for construction site conditions. It is particularly suitable for the demolition of buildings located in urban areas with narrow roads, dense pedestrian traffic, and complex surrounding environments.

[0014] In one alternative implementation, the following steps are included before the extended-arm hydraulic shears are passed through the channel into the atrium:

[0015] The inner bottom surface of the atrium used for the movement of the extended boom hydraulic shear is backed up.

[0016] In one alternative implementation, two extended-arm hydraulic shears are provided, which are used to simultaneously demolish both symmetrical sides of the high-rise structure.

[0017] In one optional implementation, the high-rise structure has five floors, and before demolishing the high-rise structure numbered 5, the following steps are also included:

[0018] Using extended-arm hydraulic shears, the beams and slabs of the high-rise structures numbered 2, 3, 4, and 5, which are relatively close to the atrium in the horizontal direction, were partially demolished.

[0019] In one alternative implementation, the following steps are included before demolishing the high-rise structure numbered 5:

[0020] Using extended-arm hydraulic shears, the beams and slabs of the high-rise structure numbered 4, which are relatively close to the atrium in the horizontal direction, were further removed.

[0021] In one alternative implementation, the following steps are included before demolishing the high-rise structure numbered 4:

[0022] Using extended-arm hydraulic shears, the beams and slabs of the high-rise structure numbered 3, which are relatively close to the atrium in the horizontal direction, were further removed.

[0023] In one alternative implementation, the following steps are included before demolishing the high-rise structure numbered 3:

[0024] Using extended-arm hydraulic shears, the beams and slabs of the high-rise structure numbered 2, which are relatively close to the atrium in the horizontal direction, were further removed.

[0025] In one alternative implementation, the following steps are included before demolishing the high-rise structure numbered 2:

[0026] The cantilevered corridor of the high-rise structure numbered 1, located horizontally relative to the atrium, was demolished using extended-arm hydraulic shears.

[0027] In one optional embodiment, the multi-story concrete frame further includes a basement structure located at the end of the bottom structure relatively far from the upper structure; after the bottom structure is demolished, the frame also includes the following structure:

[0028] The basement structure was dismantled by cutting the top beam slab that was relatively close to the bottom structure using a wire saw.

[0029] In one alternative implementation, the following steps are included before using a wire saw to cut the underlying structure for removal:

[0030] The beams and slabs of the lower structure, which are relatively close to the upper structure numbered 1, were removed using extended-arm hydraulic shears. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 is a schematic diagram of the demolition of the high-rise structure numbered 5 of the concrete frame of The Opposite House Hotel in this embodiment.

[0033] Figure 2 is a schematic diagram of the demolition of the high-rise structure numbered 4 of the concrete frame of The Opposite House Hotel in this embodiment.

[0034] Figure 3 is a schematic diagram of the demolition of the high-rise structure numbered 3 of the concrete frame of The Opposite House Hotel in this embodiment.

[0035] Figure 4 is a schematic diagram of the demolition of the high-rise structure numbered 2 of the concrete frame of The Opposite House Hotel in this embodiment.

[0036] Figure 5 is a schematic diagram of the demolition of the No. 1 high-rise structure of the concrete frame of The Opposite House Hotel in this embodiment.

[0037] Figure 6 is a schematic diagram of the demolition of the bottom structure of the concrete frame of The Opposite House Hotel in this embodiment.

[0038] Figure 7 is a schematic diagram of the demolition of the basement structure of the concrete frame of The Opposite House Hotel in this embodiment.

[0039] Explanation of reference numerals in the attached diagram: 100-Atrium, 200-Passageway, 300-Extended arm hydraulic shears. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0043] The embodiments of this application are described below with reference to Figures 1 to 7.

[0044] According to an embodiment of this application, a method for demolishing a multi-story concrete frame is provided, specifically applied to the demolition of the concrete frame of The Opposite House Hotel located in the Sanlitun Taikoo Li North Area of ​​Chaoyang District, Beijing. The concrete frame of The Opposite House Hotel consists of the main frame remaining after the protective removal of furniture, doors, lighting fixtures, bathroom facilities, artwork, decoration materials, glass railings, etc., and the non-protective removal of the skylight. The concrete frame of The Opposite House Hotel includes six floors above ground (i.e., one ground floor structure and five high-rise structures, with the five high-rise structures numbered 1, 2, 3, 4, and 5 from bottom to top) and a basement structure. An atrium 100 is provided within the concrete frame of The Opposite House Hotel. The demolition method for the concrete frame of The Opposite House Hotel specifically includes the following steps:

[0045] A passage 200 connecting the atrium 100 is opened in the bottom structure of the concrete frame of The Opposite House Hotel, and an extended-arm hydraulic shear 300 in a folded state is passed through the passage 200 into the atrium 100.

[0046] The extended arm hydraulic shear 300 is switched from the folded state to the unfolded state, so that the shearing part of the extended arm hydraulic shear 300 corresponds to the high-rise structure numbered 5, and the extended arm hydraulic shear 300 is moved within the atrium 100 to dismantle the high-rise structure numbered 5.

[0047] After the demolition of the high-rise structure numbered 5 is completed, the position of the shearing part of the extended arm hydraulic shear 300 is lowered to correspond to the high-rise structure numbered 4, and the extended arm hydraulic shear 300 is moved within the atrium 100 to demolish the high-rise structure numbered 4.

[0048] After the demolition of the high-rise structure numbered 4 is completed, the position of the shearing part of the extended arm hydraulic shear 300 is lowered to correspond with the high-rise structure numbered 3, and the extended arm hydraulic shear 300 is moved within the atrium 100 to demolish the high-rise structure numbered 3.

[0049] After the demolition of the high-rise structure numbered 3 is completed, the position of the shearing part of the extended arm hydraulic shear 300 is lowered to correspond to the high-rise structure numbered 2, and the extended arm hydraulic shear 300 is moved within the atrium 100 to demolish the high-rise structure numbered 2.

[0050] After the demolition of the high-rise structure number 2 is completed, the position of the shearing part of the extended arm hydraulic shear 300 is lowered to correspond to the high-rise structure number 1, and the extended arm hydraulic shear 300 is moved within the atrium 100 to demolish the high-rise structure number 1.

[0051] The underlying structure was dismantled by cutting it with a wire saw. Specifically, the top of the columns and the beams and slabs at the driveway location of the underlying structure were cut with a wire saw, while retaining a minimum length of 1 meter of steel reinforcement at the top of the columns for use in the new construction.

[0052] The demolition method within the building in this embodiment involves first creating a passageway 200 connecting the atrium 100 to the bottom structure of the concrete frame of The Opposite House Hotel. This allows a folded extended-arm hydraulic shear 300 to pass through the passageway 200 and enter the atrium 100. The atrium 100 provides space for the extended-arm hydraulic shear 300 to unfold and move, enabling it to move, transfer, and rise flexibly within the atrium 100. This allows the five-story high-rise structure to be demolished sequentially from top to bottom while keeping the extended-arm hydraulic shear 300 inside the concrete frame of The Opposite House Hotel. This achieves the demolition of most of the concrete frame of The Opposite House Hotel within the building, reducing the amount of dust and noise that diffuses into the external environment. Furthermore, the demolished wall fragments are mostly placed inside the building, achieving low noise, low pollution, and minimal requirements for the construction site conditions. This method is particularly suitable for the demolition of the concrete frame of The Opposite House Hotel, located in an urban area with narrow roads, high pedestrian traffic, and a complex surrounding environment.

[0053] It should be noted that The Opposite House is located in Sanlitun, Chaoyang District, Beijing, where the roads are narrow, pedestrian traffic is dense, and the surrounding environment is complex. It is close to important buildings such as commercial buildings, residences, schools, hospitals, and embassies. Furthermore, there is no demolition access surface on the outside of the Opposite House's concrete frame, so only static demolition can be used. Traditional external demolition methods are prone to causing fragments of the wall to fall and impact important buildings in the vicinity during the demolition of the concrete frame, and the dust and noise generated can easily spread to the surrounding environment outside the hotel. Therefore, traditional external demolition methods are not suitable for demolishing the concrete frame of The Opposite House.

[0054] In a specific application, since The Opposite House Hotel only has about 15 meters of usable space on its east side, a passageway 200 connecting to the atrium 100 is opened on the east side of the hotel's ground floor structure so that the extended-arm hydraulic shears 300 can enter the atrium 100 from the approximately 15-meter space via the passageway 200; and to facilitate the transport of dismantled components from the east side by vehicles entering and exiting the atrium 100.

[0055] It should be noted that demolishing a high-rise structure actually involves removing the beams, slabs, and columns.

[0056] Understandably, the extended boom hydraulic shear 300 has a demolition height of up to 30m and an opening diameter of 850mm, which can be used to demolish beams, slabs, and columns. The concrete frame of The Opposite House Hotel does not have the conditions for the extended boom hydraulic shear 300 to operate on, but the original hotel has an atrium 100 with an area of ​​approximately 400 square meters, which can be used as the operating surface for the extended boom hydraulic shear 300.

[0057] It is understood that this embodiment is only used as an example of a multi-story concrete frame, and does not limit the specific type of multi-story concrete frame. In other embodiments, the multi-story concrete frame can also be a four-story hotel, a five-story hotel, a seven-story hotel, etc., with an atrium 100, located in a city with narrow roads, dense traffic and complex surrounding environment.

[0058] Specifically, during the demolition of high-rise buildings inside the building, water trucks can be used to spray water on the demolition work area of ​​the extended-arm hydraulic shear 300 to reduce dust and effectively control environmental pollution.

[0059] In some embodiments, the following steps are included before the extended-arm hydraulic shear 300 is passed through the channel 200 into the atrium 100:

[0060] The inner bottom surface of the atrium 100, which is used for the travel of the extended arm hydraulic shear 300, is subjected to a top-mounting treatment.

[0061] This embodiment improves the support stability of the inner bottom surface of the atrium 100 by pre-treating the inner bottom surface, thereby facilitating the smooth back-and-forth movement and transfer of the extended arm hydraulic shear 300 on the inner bottom surface of the atrium 100 and improving the quality of demolition.

[0062] In some embodiments, two extended-arm hydraulic shears 300 are provided, and the two extended-arm hydraulic shears 300 are used to demolish the two symmetrical sides of the high-rise structure at the same time; symmetrical demolition is achieved, construction safety is high and demolition speed is fast.

[0063] In some embodiments, the following steps are included before demolishing the high-rise structure numbered 5:

[0064] Using extended-arm hydraulic shears 300, the beams and slabs of the high-rise structures numbered 2, 3, 4 and 5, which are relatively close to the atrium 100 in the horizontal direction, were partially demolished.

[0065] This embodiment first partially demolishes the beams and slabs of the high-rise structure located on the top four floors, which are relatively close to the atrium 100. This ensures that the concrete frame of The Opposite House Hotel will not collapse, thereby expanding the working range of the extended-arm hydraulic shear 300 at a higher position, which is conducive to improving the demolition effect and the convenience of the demolition operation.

[0066] Specifically, the following steps are included before the demolition of the high-rise structure numbered 5:

[0067] Using an extended-arm hydraulic shear 300, the beams and slabs of the high-rise structure numbered 4, which are relatively close to the atrium 100 in the horizontal direction, were further removed.

[0068] Since the floor slab of the high-rise structure numbered 4 mainly supports the high-rise structure numbered 5, this embodiment further dismantles the floor slab of the high-rise structure numbered 4, which has already been partially demolished, without causing the overall collapse of the high-rise structure numbered 5. It also further expands the working space for the extended-arm hydraulic shear 300 to dismantle the high-rise structure numbered 5, thereby further improving the convenience of dismantling the high-rise structure numbered 5.

[0069] Specifically, the following steps are included before the demolition of the high-rise structure numbered 4:

[0070] Using an extended-arm hydraulic shear 300, the beams and slabs of the high-rise structure numbered 3, which are relatively close to the atrium 100 in the horizontal direction, were further removed.

[0071] Because after the high-rise structure numbered 5 is demolished, the floor slab of the high-rise structure numbered 3 mainly supports the high-rise structure numbered 4. Therefore, in this embodiment, further demolishing the floor slab of the high-rise structure numbered 3, which has already been partially demolished, will not cause the high-rise structure numbered 4 to collapse as a whole. Moreover, it can further expand the working space of the extended arm hydraulic shear 300 for demolishing the high-rise structure numbered 4, thereby further improving the convenience of demolishing the high-rise structure numbered 4.

[0072] Specifically, the following steps are included before the demolition of the high-rise structure numbered 3:

[0073] Using an extended-arm hydraulic shear 300, the beams and slabs of the high-rise structure numbered 2, which are relatively close to the atrium 100 in the horizontal direction, were further removed.

[0074] Because after the high-rise structures numbered 4 and 5 are demolished, the floor slab of the high-rise structure numbered 2 mainly supports the high-rise structure numbered 3. Therefore, in this embodiment, further demolishing the floor slab of the high-rise structure numbered 2, which has already been partially demolished, will not cause the high-rise structure numbered 3 to collapse as a whole. Moreover, it can further expand the working space of the extended arm hydraulic shear 300 for demolishing the high-rise structure numbered 3, thereby further improving the convenience of demolishing the high-rise structure numbered 3.

[0075] Specifically, before demolishing the high-rise structure numbered 2, the following steps are also included:

[0076] Using an extended-arm hydraulic shear 300, the cantilevered corridor of the high-rise structure numbered 1, which is relatively close to the atrium 100 in the horizontal direction, was demolished.

[0077] This embodiment first removes the cantilevered corridor of the high-rise structure numbered 1, freeing up more space, thereby further improving the convenience of removing the high-rise structure numbered 2.

[0078] In some embodiments, after the underlying structure is removed, the following structure is also included:

[0079] The basement structure was dismantled by cutting the top beam slabs that were relatively close to the bottom layer structure using a wire saw; the shear walls were to be demolished later after the new building structure reached the design requirements, in order to ensure the overall rigidity of the new building structure.

[0080] In some embodiments, the following steps are included before using a wire saw to cut the underlying structure for removal:

[0081] The extended-arm hydraulic shears 300 were used to dismantle the beams and slabs of the bottom structure that were relatively close to the upper structure numbered 1.

[0082] This embodiment utilizes an extended-arm hydraulic shear 300 to demolish the beams and slabs of the underlying structure, and employs a wire saw to demolish other parts of the underlying structure, thereby shortening the construction period while retaining at least 1 meter of the top column reinforcement used to connect the reinforcement of the new construction project.

[0083] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended invention.

Claims

1. A method for demolishing a multi-story concrete frame, applied to the demolition of a multi-story concrete frame with an atrium (100), wherein the multi-story concrete frame includes a bottom structure and multiple high-rise structures sequentially arranged on the bottom structure, the multiple high-rise structures being numbered 1, 2...N-1, N from bottom to top, characterized in that, The method for demolishing the building includes the following steps: A passage (200) communicating with the atrium (100) is opened at the lower end of the multi-story concrete frame, and an extended-arm hydraulic shear (300) in a folded state is passed through the passage (200) into the atrium (100); The extended arm hydraulic shear (300) is switched from the folded state to the unfolded state, so that the shearing part of the extended arm hydraulic shear (300) corresponds to the high-rise structure numbered N, and the extended arm hydraulic shear (300) is moved in the atrium (100) to dismantle the high-rise structure numbered N. After the demolition of the high-rise structure numbered N is completed, the position of the shearing part of the extended arm hydraulic shear (300) is lowered to correspond to the high-rise structure numbered N-1, and the extended arm hydraulic shear (300) is moved in the atrium (100) to demolish the high-rise structure numbered N-1; this step is repeated until the high-rise structure numbered 1 is demolished; The underlying structure was dismantled using a wire saw.

2. The method for demolishing a multi-story concrete frame inside a building according to claim 1, characterized in that, Before the extended-arm hydraulic shears (300) are passed through the channel (200) into the atrium (100), the following steps are also included: The inner bottom surface of the atrium (100) used for the travel of the extended arm hydraulic shear (300) is backed up.

3. The method for demolishing a multi-story concrete frame inside a building according to claim 1, characterized in that, Two extended-arm hydraulic shears (300) are provided, and the two extended-arm hydraulic shears (300) are used to demolish the two symmetrical sides of the high-rise structure at the same time.

4. The method for demolishing a multi-story concrete frame inside a building according to any one of claims 1 to 3, characterized in that, The high-rise structure has five floors. Before demolishing the high-rise structure numbered 5, the following steps are also included: Using extended-arm hydraulic shears (300), the beams and slabs of the high-rise structures numbered 2, 3, 4 and 5, which are relatively close to the atrium (100) in the horizontal direction, were partially demolished.

5. The method for demolishing a multi-story concrete frame inside a building according to claim 4, characterized in that, Before demolishing the high-rise structure numbered 5, the following steps are also included: Using extended-arm hydraulic shears (300), the beams and slabs of the high-rise structure numbered 4, which are relatively close to the atrium (100) in the horizontal direction, are further removed.

6. The method for demolishing a multi-story concrete frame inside a building according to claim 5, characterized in that, Before demolishing the high-rise structure numbered 4, the following steps are also included: Using extended-arm hydraulic shears (300), the beams and slabs of the high-rise structure numbered 3, which are relatively close to the atrium (100) in the horizontal direction, are further removed.

7. The method for demolishing a multi-story concrete frame inside a building according to claim 6, characterized in that, Before demolishing the high-rise structure numbered 3, the following steps are also included: Using extended-arm hydraulic shears (300), the beams and slabs of the high-rise structure numbered 2, which are relatively close to the atrium (100) in the horizontal direction, are further removed.

8. The method for demolishing a multi-story concrete frame inside a building according to claim 6 or 7, characterized in that, Before demolishing the high-rise structure numbered 2, the following steps are also included: The cantilevered corridor of the high-rise structure numbered 1, which is relatively close to the atrium (100) in the horizontal direction, was demolished using extended-arm hydraulic shears (300).

9. The method for demolishing a multi-story concrete frame inside a building according to claim 1, characterized in that, The multi-story concrete frame also includes a basement structure, which is located at the end of the bottom structure relatively far from the upper structure; after the bottom structure is demolished, it also includes the following structure: The basement structure was dismantled by cutting the top beam slab that was relatively close to the bottom structure using a wire saw.

10. The method for demolishing a multi-story concrete frame inside a building according to claim 1, characterized in that, Before using a wire saw to cut the underlying structure for demolition, the following steps are also included: The beams and slabs of the lower structure, which are relatively close to the upper structure numbered 1, are removed using extended-arm hydraulic shears (300).

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