A device for replacing a brace

Abstract

The utility model relates to a foundation pit construction technology field especially relates to a device for replacing the device that changes the support, including scaffold, the first steel pipe and second steel pipe are added in the original change support height range, first steel pipe is parallel with horizontal steel pipe, second steel pipe is parallel with longitudinal steel pipe, every first steel pipe and second steel pipe are effectively fixed through vertical rod, first steel pipe and second steel pipe are respectively through telescopic part to press the side wall tightly, offset the pressure of side wall, reach the purpose of preventing the side wall in dip, the arrangement interval of first steel pipe and second steel pipe in vertical direction is smaller than the interlayer interval of scaffold, and the encryption arrangement makes better support force can be provided, guarantees the demolition safety of steel support, and the above structure is used in cooperation with the scaffold for formwork, can synchronous construction, reduces the construction step, speeds up the construction progress, need not separate construction change support, can also avoid the safety risk of demolition link, and convenient demolition, convenient for construction, the security is better, and the influence to structure after demolition is also smaller.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit construction technology, and in particular to a device for replacing the support structure. Background Technology

[0002] Currently, at the end shaft of the deep underground station foundation pit, the support needs to be replaced during construction. After the bottom slab reaches the preset strength, the bottom steel support will be removed, and then the side wall will be poured up to the second to last steel support. After the preset strength is reached, the replacement steel support will be constructed between the second to last and third steel supports. Then the second to last and third steel supports will be removed, and the corresponding side wall and floor slab will be poured upwards. After that, the steel support will continue to be removed upwards, and the side wall and floor slab (or top slab) will be poured.

[0003] The construction of the replacement support device can effectively prevent cracks in the diaphragm wall, prevent the retaining structure from tilting inward, and prevent the foundation pit from becoming unstable. However, the steel support of the replacement support is inconvenient to install and must be removed by a separate dismantling device after the top is sealed. The dismantling and transportation are difficult, and the side walls also need to be additionally installed with embedded steel plates. The replacement support will also conflict with the high formwork frame, affecting the structural construction. Moreover, the removal of the replacement support will release stress, and the wall surface is prone to cracks, leading to the risk of water seepage. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology in which the replacement support method is often used in the pouring process of the end well, but has many drawbacks, and to provide a device to replace the replacement support.

[0005] This utility model provides a device for replacing formwork supports, including scaffolding for formwork support. The scaffolding is further connected with several first steel pipes and several second steel pipes. The first steel pipes are arranged transversely along the foundation pit, and the second steel pipes are arranged longitudinally along the foundation pit. The horizontal spacing of the first steel pipes is the same as the longitudinal spacing of the scaffolding uprights along the foundation pit, and the horizontal spacing of the second steel pipes is the same as the transverse spacing of the uprights along the foundation pit. Both the first and second steel pipes are connected to their corresponding uprights. The vertical spacing of the first steel pipes is smaller than the vertical spacing of the transverse steel pipes of the scaffolding, and the vertical spacing of the second steel pipes is smaller than the vertical spacing of the longitudinal steel pipes of the scaffolding. The first and second steel pipes are arranged vertically in a corresponding manner, and both are positioned within the height range of the formwork support. Both ends of the first and second steel pipes are equipped with telescopic components, which abut against the side walls or central columns.

[0006] The present invention describes a device for replacing the support structure. The scaffolding used for constructing side walls and the middle slab includes uprights, transverse steel pipes arranged horizontally along the foundation pit, longitudinal steel pipes arranged vertically along the foundation pit, and diagonal braces. Within the original support height range, a first steel pipe and a second steel pipe are added. The first steel pipe is parallel to the transverse steel pipe, and the second steel pipe is parallel to the longitudinal steel pipe. Each first and second steel pipe is effectively fixed by the uprights. The first and second steel pipes are respectively tightened against the side wall through telescopic components to offset the pressure on the side wall and prevent inward tilting. The vertical spacing of the first and second steel pipes (i.e., along the height of the foundation pit) is smaller than the inter-layer spacing of the scaffolding. This denser arrangement provides better support and ensures the safety of dismantling the steel supports. When used in conjunction with the scaffolding used for formwork, the above structure allows for simultaneous construction, reduces construction steps, accelerates construction progress, eliminates the need for separate support replacement, avoids safety risks during dismantling, and is easy to dismantle, facilitating construction, improving safety, and minimizing the impact on the structure after dismantling.

[0007] Preferably, the telescopic component is an adjustable support, which includes a screw and a nut, and the exposed length of the screw is ≤500mm.

[0008] Preferably, the spacing between the uprights is 600-900mm, and the slenderness ratio of the uprights is 96-100.

[0009] Preferably, the vertical spacing of the first steel pipes is 400mm-500mm.

[0010] Preferably, the horizontal spacing of the transverse steel pipes of the scaffold is adapted to the horizontal spacing of the first steel pipe.

[0011] Preferably, the horizontal spacing of the longitudinal steel pipes of the scaffold is adapted to the horizontal spacing of the first steel pipe. Preferably, the foundation also includes several diagonal braces arranged longitudinally along the foundation pit, with the upper end of the diagonal brace connected to the uppermost first or second steel pipe, and the lower end of the diagonal brace supported at the high and low spans of the base plate. Preferably, both the first steel pipe and the second steel pipe are connected to the scaffolding via fasteners or disc buckles.

[0012] Preferably, both the first steel pipe and the second steel pipe include several steel pipe segments, and two corresponding steel pipe segments are connected by a butt joint, wherein the butt joints are offset by at least 500mm in the horizontal direction.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a device for replacing the support, which can effectively offset the pressure of the side wall and prevent the side wall from tilting inward. The above structure can be used in conjunction with the scaffolding used for formwork support to carry out construction simultaneously, reduce construction steps, speed up construction progress, eliminate the need for separate support replacement, avoid the safety risks of dismantling, and is easy to dismantle, which is convenient for construction, has better safety, and has less impact on the structure after dismantling. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of a device for replacing a support according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 This is a longitudinal sectional view of a device of the present invention for replacing a support. Figure 4 This is a plan view of a device according to the present invention for replacing a support. Figure 5 for Figure 4 A magnified view of a portion of the image.

[0015] icon: 1-First steel pipe, 2-Second steel pipe, 31-Upright pole, 32-Horizontal steel pipe, 33-Longitudinal steel pipe, 4-Expansion joint, 5-Side wall, 6-Central column, 7-Diagonal brace, 8-Base plate. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0017] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0019] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0020] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0021] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0022] Example 1 like Figures 1 to 5As shown, the scaffolding includes a formwork support system. Several first steel pipes 1 and several second steel pipes 2 are connected to the scaffolding. The first steel pipes 1 are arranged transversely along the foundation pit, and the second steel pipes 2 are arranged longitudinally along the foundation pit. The horizontal spacing of the first steel pipes 1 is the same as the longitudinal spacing of the scaffolding uprights 31 along the foundation pit. The horizontal spacing of the second steel pipes 2 is the same as the transverse spacing of the uprights 31 along the foundation pit. Both the first steel pipes 1 and the second steel pipes 2 are connected to their corresponding uprights 31. The vertical spacing of the first steel pipes 1 is less than the vertical spacing of the transverse steel pipes 32 of the scaffolding. The vertical spacing of the second steel pipe 2 is less than the vertical spacing of the longitudinal steel pipes 33 of the scaffold. The first steel pipe 1 and the second steel pipe 2 are arranged vertically in correspondence. The first steel pipe 1 and the second steel pipe 2 are both arranged within the height range of the replacement support. The two ends of the first steel pipe 1 and the corresponding ends of the second steel pipe 2 are provided with telescopic components 4. The first steel pipe 1 and the second steel pipe 2 abut against the side wall 5 or the central column 6 through the telescopic components 4. Several diagonal braces 7 are also provided between the uppermost first steel pipe 1 or the second steel pipe 2 and the high and low spans of the bottom plate 8. The diagonal braces 7 are distributed at intervals along the transverse direction of the foundation pit.

[0023] The scaffolding can be a conventional disc-lock scaffolding. The telescopic component 4 is an adjustable support. The adjustable support includes a screw and a nut. Adjust the exposed length of the screw to make it press against the side wall, but the exposed length should be ≤500mm to avoid eccentricity.

[0024] The spacing of the uprights 31 is 600-900mm. The horizontal spacing of the transverse steel pipes 32 matches the horizontal spacing of the first steel pipe 1. The horizontal spacing of the longitudinal steel pipes 33 matches the horizontal spacing of the first steel pipe 1. The vertical spacing of the first steel pipe 1 and the second steel pipe 2 is 400mm-500mm. Although used in conjunction with the formwork support frame, the arrangement spacing is denser than that of conventional formwork support scaffolding. That is, the arrangement spacing of the transverse steel pipes 32 and the longitudinal steel pipes 33 is increased along with the arrangement spacing of the first steel pipe 1 and the second steel pipe 2, effectively improving the support performance. The slenderness ratio of the uprights 31 is 96-100, which ensures the load-bearing capacity of a single upright 31. This effectively achieves the purpose of replacing the support frame by using the formwork support frame in conjunction with the first steel pipe 1, the second steel pipe 2, and the diagonal brace 7. The cantilever section length of the first steel pipe 1 and the second steel pipe 2 is ≤0.3m. The first steel pipe 1 and the second steel pipe 2 can be connected to the scaffold uprights 31 with right-angle couplers or swivel couplers using a socket-type disc coupler. The first steel pipe 1 and the second steel pipe 2 each include several steel pipe segments. The corresponding two steel pipe segments are connected by a butt joint. The joint is not located in the same phase or span. Two adjacent joints in different phases or spans are staggered by at least 500mm in the horizontal direction.

[0025] When the first steel pipe 1 or the second steel pipe 2 encounters the central column 6 and cannot pass through, the corresponding steel pipe is cut off at the central column 6, and the telescopic component 4 at the end is used to press against the central column 6. The corresponding steel pipes on both sides of the central column 6 should be arranged coaxially.

[0026] The device described in this utility model for replacing the support can effectively offset the pressure on the side wall and prevent the side wall from tilting inward. When used in conjunction with the scaffolding used for formwork, the above structure can be constructed simultaneously, reducing construction steps and speeding up the construction progress. There is no need for separate support replacement, and it can also avoid the safety risks of the dismantling process. Moreover, it is easy to dismantle, facilitates construction, has better safety, and has less impact on the structure after dismantling.

[0027] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for replacing a support, characterized in that, The structure includes scaffolding for formwork support, on which are connected a plurality of first steel pipes (1) and a plurality of second steel pipes (2). The first steel pipes (1) are arranged transversely along the foundation pit, and the second steel pipes (2) are arranged longitudinally along the foundation pit. The horizontal spacing of the first steel pipes (1) is the same as the longitudinal spacing of the uprights (31) of the scaffolding, and the horizontal spacing of the second steel pipes (2) is the same as the transverse spacing of the uprights (31) of the foundation pit. Both the first steel pipes (1) and the second steel pipes (2) are connected to the corresponding uprights (31). The vertical spacing of the first steel pipes (1) is... The vertical spacing of the second steel pipe (2) is less than the vertical spacing of the longitudinal steel pipe (33) of the scaffold. The first steel pipe (1) and the second steel pipe (2) are arranged vertically in a corresponding manner. The first steel pipe (1) and the second steel pipe (2) are both arranged within the height range of the support. The two ends of the first steel pipe (1) and the corresponding ends of the second steel pipe (2) are provided with telescopic components (4). The first steel pipe (1) and the second steel pipe (2) abut against the side wall (5) or the central column (6) through the telescopic components (4).

2. The device for replacing the support according to claim 1, characterized in that, The telescopic component (4) is an adjustable support, which includes a screw and a nut, and the exposed length of the screw is ≤500mm.

3. The device for replacing the support according to claim 1, characterized in that, The slenderness ratio of the upright (31) is 96-100.

4. The device for replacing the support according to claim 1, characterized in that, The spacing between the uprights (31) is 600-900mm.

5. The device for replacing the support according to claim 1, characterized in that, The vertical spacing of the first steel pipe (1) is 400mm-500mm.

6. The device for replacing the support according to claim 1, characterized in that, The horizontal spacing of the transverse steel pipes (32) of the scaffold is adapted to the horizontal spacing of the first steel pipe (1).

7. The device for replacing the support according to claim 1, characterized in that, The horizontal spacing of the longitudinal steel pipes (33) of the scaffold is adapted to the horizontal spacing of the first steel pipe (1).

8. A device for replacing a support according to any one of claims 1-7, characterized in that, It also includes several diagonal braces (7) arranged longitudinally along the foundation pit. The upper end of the diagonal brace (7) is connected to the uppermost first steel pipe (1) or second steel pipe (2), and the lower end of the diagonal brace (7) is supported at the high and low spans of the base plate (8).

9. The device for replacing the support according to claim 8, characterized in that, The first steel pipe (1) and the second steel pipe (2) are both connected to the scaffold by fasteners or disc buckles.

10. The device for replacing the support according to claim 8, characterized in that, The first steel pipe (1) and the second steel pipe (2) each include several steel pipe segments, and two corresponding steel pipe segments are connected by a butt joint, which is offset by at least 500mm in the horizontal direction.

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