A demountable composite steel internal bracing system and method of construction

Abstract

The application provides a type steel inner support and a construction method thereof, and the type steel inner support is connected with a structure wall through a wall brace node, the wall brace node comprises a first section wall outer type steel inner support, a wall inner type steel inner support, a second section wall outer type steel inner support and four connecting assemblies; one end of the first section wall outer type steel inner support is fixedly connected with one end of the wall inner type steel inner support extending out of the structure wall, and the other end of the wall inner type steel inner support extending out of the structure wall is fixedly connected with one end of the second section wall outer type steel inner support through two connecting assemblies in a diagonal symmetry mode; the connecting section of the first section wall outer type steel inner support and the second section wall outer type steel inner support with the wall inner type steel inner support extending out of the structure wall is a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are the same as a first inclined angle and a second inclined angle between the type steel inner support, respectively. The application solves the problem that the type steel inner support must be removed before the main structure is constructed, and has the advantages of reducing waste and improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support construction technology, and in particular to an easily removable combined steel internal support and its construction method. Background Technology

[0002] With the continuous development of construction technology, deep foundation pit projects have become increasingly common in recent years. To ensure project quality, schedule, and safety, the type of internal support and its construction methods are crucial. Currently, steel internal supports are widely used in deep foundation pit projects. During deep foundation pit construction, the symmetrical installation of prestressed steel internal supports between the walers often significantly impacts the overall construction progress. Only by ensuring sufficient strength and rigidity of the steel internal supports, and facilitating their handling and disassembly during construction, can the project's progress be guaranteed while ensuring safety. However, currently, in deep foundation pit construction, all steel internal supports must be removed before the main structure construction can begin. The inability to construct the main structure during steel internal support removal, coupled with the inconvenience of disassembling and transporting the steel internal supports, leads to delays and extensions in the foundation pit construction period. Summary of the Invention

[0003] To overcome the problems existing in the prior art, the present invention provides an easy-to-remove combined steel internal support and its construction method. Based on the traditional steel support system, the present invention adds an installable and detachable steel support combination node at the intersection of the steel internal support and the main structure, dividing the traditional steel support into several segments, so that it becomes a combined structure that can be freely disassembled at the structural wall.

[0004] An easily removable and reassembled steel internal support is provided, wherein a wall support node is provided at the connection between the steel internal support and the structural wall. The wall support node includes a first external steel internal support, an internal steel internal support, a second external steel internal support, and four connecting components. One end of the first external steel internal support is fixedly connected to one end of the internal steel internal support extending out of the structural wall by two obliquely symmetrical connecting components. The other end of the internal steel internal support extending out of the structural wall is fixedly connected to one end of the second external steel internal support by two obliquely symmetrical connecting components. The connection section between one end of the first external steel internal support and one end of the internal steel internal support extending out of the structural wall is a first inclined surface, and the connection section between the other end of the internal steel internal support extending out of the structural wall and the second external steel internal support is a second inclined surface. The first and second inclined surfaces are parallel to each other, and the first and second inclined surfaces have the same first and second inclination angles with the steel internal supports, respectively.

[0005] Furthermore, the first or second tilt angle is between 45° and 60°, and the length of the internal steel support extending out of the structural wall is ≥10cm.

[0006] Furthermore, an anti-braking node is provided at the connection between the inner steel support and the waler. The anti-braking node includes a first section of outer steel inner support, a waler outer steel inner support, and two connecting components. The other end of the first section of outer steel inner support is fixedly connected to one end of the waler outer steel inner support through two obliquely symmetrical connecting components. The other end of the waler outer steel inner support is welded and fixed to the embedded part in the protective structure. The connection section between the other end of the first section of outer steel inner support and one end of the waler outer steel inner support is a third inclined surface.

[0007] Furthermore, the two connecting components include an upper connecting component and a lower connecting component. The upper connecting component is used to connect the upper edge of the first section of the external steel internal support to the upper edge of the end of the internal steel internal support extending out of the wall. The lower connecting component is used to connect the lower edge of the first section of the external steel internal support to the lower edge of the end of the internal steel internal support extending out of the wall.

[0008] Furthermore, the connecting assembly includes a first equilateral angle iron, a second equilateral angle iron, and a washer. One side of the first equilateral angle iron is fixedly connected to the inner support side of the first section of the wall by a high-strength bolt. One side of the second equilateral angle iron is fixedly connected to one end of the inner support side extending out of the wall by a high-strength bolt. The washer is disposed between the other side of the first equilateral angle iron and the other side of the second equilateral angle iron. The other side of the first equilateral angle iron and the other side of the second equilateral angle iron are fixedly connected by a high-strength bolt passing through the washer.

[0009] The second technical solution provided by this invention is:

[0010] A construction method for an easily dismantled and assembled steel internal support includes the following steps:

[0011] Step 1) Optimize the design of the internal steel support, and determine the location of the wall support node and the anti-bracing node based on the design drawings;

[0012] Step 2) Preliminary construction work for the installation of internal steel supports;

[0013] Step 3) Construction of steel columns, assembly and installation of walers and easily disassembled and assembled steel internal support components, and application of prestress;

[0014] Step 4) Construction of foundation and main structure;

[0015] Step 5) Remove the prestressed steel internal supports that are easy to disassemble and assemble.

[0016] Furthermore, during construction step 1), the location of the internal steel bracing must be rationally deployed to ensure that the internal steel bracing does not intersect with the structural columns and that the wall bracing node of the easily removable combined steel bracing is located at the basement wall. This ensures that the originally integral easily removable combined steel bracing is disconnected at the wall bracing node, facilitating subsequent removal of the easily removable combined steel bracing.

[0017] Furthermore, the assembly of the easily disassembled and assembled steel internal support with wall bracing nodes in step 3 includes the following steps:

[0018] 3.1) The easily disassembled and assembled steel internal support includes a wall support node, which is assembled from multiple sections of steel internal supports. The wall support node includes a first section of external steel internal support, an internal steel internal support, a second section of external steel internal support, and four connecting components. The two connecting components include an upper connecting component and a lower connecting component. The upper connecting component connects the upper edge of the first section of external internal support to the upper edge of the end of the internal internal support extending out of the wall. The lower connecting component connects the lower edge of the first section of external internal support to the lower edge of the end of the internal internal support extending out of the wall. The connecting components include a first-order... The first equilateral angle iron, the second equilateral angle iron, and the shim are used to fix one side of the first equilateral angle iron to the side of the first section of the wall's outer inner support using high-strength bolts. The second equilateral angle iron is fixed to one end of the wall's inner support extending out of the wall using high-strength bolts. The shim is placed between the other side of the first equilateral angle iron and the other side of the second equilateral angle iron. The first equilateral angle iron and the second equilateral angle iron are fixed to each other using high-strength bolts. This assembles the first section of the wall's outer steel inner support and the end of the wall's inner steel inner support extending out of the structural wall.

[0019] 3.2) Using the same structure as in step 3.1, the second section of the external steel internal support and the internal steel internal support extending out of the structural wall are assembled together to complete the assembly of the easily disassembled and assembled steel internal support.

[0020] Furthermore, in step 4), during the foundation construction and the pouring of the structural wall, the internal steel support is poured into the structural wall, and the internal steel support is waterproofed to avoid removing the internal steel support before the construction of this structural wall.

[0021] Further, in step 5), when dismantling the easily removable prestressed steel internal supports, a graded unloading method should be adopted. Before dismantling the steel supports, the prestress of the easily removable steel internal supports in the dismantling area must be released. During dismantling, excessive instantaneous release of prestress should be avoided to prevent local deformation and cracking of the structure. During the release of prestress, jacks should be used to support and tighten appropriately first, then the pressure-bearing components should be opened and the force-holding box removed. After checking that everything is correct, the jacks on the supports should be released, and each wall support node and anti-support node should be dismantled in sequence. The connecting high-strength bolts should be removed, and the prestressed filling steel plate should be removed. The jacks should be gradually unloaded, and after a period of time, the unloading should continue until the end. The first section of the external steel internal supports and the second section of the external steel internal supports on both sides of the structural wall can be reused after the bolts are removed. The internal steel internal supports remaining in the structural wall that extend to the outside should be cut off by gas welding. The internal steel internal supports remaining inside the wall should not be removed and should be reinforced with waterproofing measures.

[0022] Compared with the prior art, the present invention has the following features and beneficial effects.

[0023] 1) This invention sets a node between the steel internal support and the structural wall at the intersection of the steel internal support and the structural wall. This involves segmenting the part of the steel internal support that encounters the structural wall and reassembling the segmented steel internal support using simple angle steel. This allows the steel internal support to be removed after the main structure construction is completed, which speeds up the construction progress, avoids the removal of the steel internal support before the construction of the structural wall, does not affect the structural construction, and solves the problem of construction delay.

[0024] 2) The multi-section steel internal supports of the present invention can be reused after the steel internal supports are removed, which reduces waste, reduces construction costs, and improves economic efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the connection component structure of the present invention;

[0026] Figure 2 This is a cross-sectional view of the connecting component of the present invention;

[0027] Figure 3 A schematic diagram of the connection structure between the easily disassembled and assembled steel internal support wall bracing node and the anti-bracing node of this invention.

[0028] Explanation of symbols in the attached diagram:

[0029] 1. First equilateral triangle iron, 2. Second equilateral triangle iron, 3. High-strength bolt, 4. Washer, 5. Waler, 6. Structural wall, 7. Upper connecting component, 8. Lower connecting component, 9. First section wall external steel internal support, 10. Wall internal steel internal support, 11. Second section wall external steel internal support, 12. Waler external steel internal support. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] In the description of this patent, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] An easily dismantled and assembled steel internal support and its construction method, such as Figures 1 to 3As shown, the easily disassembled and assembled steel internal support has a wall support node at the connection between the steel internal support 14 and the structural wall 6. The wall support node includes a first section of external steel internal support 9, an internal steel internal support 10, a second section of external steel internal support 11, and four connecting components 13. One end of the first section of external steel internal support 9 is fixedly connected to one end of the internal steel internal support 10 extending out of the structural wall 6 by two obliquely symmetrical connecting components 13. The other end of the internal steel internal support 10 extending out of the structural wall is connected to the second section of the internal steel internal support 6. One end of the external steel internal support 11 is fixedly connected by two obliquely symmetrical connecting components 13. One end of the first section of the external steel internal support 9 connects to one end of the internal steel internal support 10 extending out of the structural wall 6 at a first inclined surface. The other end of the internal steel internal support 10 extending out of the structural wall 6 connects to the second section of the external steel internal support 11 at a second inclined surface. The first and second inclined surfaces are parallel to each other, and the first and second inclined angles between the first and second inclined surfaces and the steel internal support 14 are the same. The steel internal supports in the deep foundation pit have corner braces and parallel braces connected to the walers at different positions, forming a deep foundation pit steel internal support system. The steel internal supports in this system may be either corner braces or parallel braces. In the current deep pit construction process, when the main structure is being constructed, because the main structure and the steel internal supports overlap in space, the existing steel internal support system needs to be dismantled before the main structure construction to make room for the main structure. However, this construction method delays the construction time and easily leads to construction period postponement. This invention, based on the existing steel internal support system, adds an installable and detachable steel support assembly node at the intersection of the steel internal support and the main structure, solving the problem of spatial overlap between the steel internal support and the main structure. Therefore, this invention provides an easily disassembled and assembled steel internal support, eliminating the need for removal before the main structure construction. Furthermore, after the main structure construction, the disassembled and easily reassembled steel internal support can be reused, saving steel and improving economic efficiency. In this invention, the main structure is a structural wall. A wall support node is set at the connection point between the spatially overlapping steel internal supports and the structural wall, effectively dividing the steel internal support into multiple segments. One end of each segment passes through the structural wall, resolving the spatial overlap problem between the structural wall and the steel internal support. Then, high-strength bolts 3 and multiple connecting components 13 are used to connect the multiple segments of the steel internal support, reassembling the steel internal support. The specific structure consists of a wall support node comprising a first section of external steel internal support 9, an internal steel internal support 10, a second section of external steel internal support 11, and four connecting components 13. By setting nodes at the spatial overlap between the structural wall and the internal steel support, the internal steel support is divided into multiple sections, and then the connecting components and high-strength bolts are used to reconnect the internal steel support.To facilitate disassembly and assembly, one end of the first section of the external steel internal support 9 is connected to one end of the internal steel internal support 10 extending out of the structural wall 6, and the cross section is the first inclined surface. The other end of the internal steel internal support 10 extending out of the structural wall 6 is connected to the second section of the external steel internal support 11, and the cross section is the second inclined surface. The first inclined surface and the second inclined surface are parallel to each other, and the first inclined surface and the second inclined surface are at the same first and second inclination angles as the internal steel support 14.

[0035] Furthermore, such as Figures 1 to 3 As shown, the first or second inclination angle ranges from 45° to 60°, and the length of the portion of the internal steel support 10 extending out of the structural wall 6 on both sides is ≥10cm. Multiple tests have confirmed that a first and second inclination angle range of 45° to 60° facilitates disassembly, and the length of the portion of the internal steel support 10 extending out of the structural wall 6 on both sides is ≥10cm, which is convenient for the assembly and disassembly of the internal steel support. In this embodiment, the first inclination angle is equal to the second inclination angle, which is 50°, and the length of the portion of the internal steel support 10 extending out of the structural wall 6 on both sides is 10cm.

[0036] Furthermore, such as Figures 1 to 3 As shown, an anti-braking node is provided at the connection between the steel inner support 14 and the waler 5. The anti-braking node includes a first section of external steel inner support 9, an external steel inner support 12 of the waler, and two connecting components. The other end of the first section of external steel inner support 9 is fixedly connected to one end of the external steel inner support 12 of the waler through two obliquely symmetrical connecting components. The other end of the external steel inner support 12 of the waler is welded and fixed to the embedded part in the waler 5. The connection section between the other end of the first section of external steel inner support 9 and the one end of the external steel inner support 12 of the waler is a third inclined surface. The anti-braking node is provided here to facilitate the later removal of the wall support node.

[0037] Furthermore, such as Figures 1 to 3 As shown, the two connecting components include an upper connecting component 7 and a lower connecting component 8. The upper connecting component 7 connects the upper edge of the first external steel internal support 9 to the upper edge of the end of the internal steel internal support 10 extending out of the wall. The lower connecting component 8 connects the lower edge of the first external steel internal support 9 to the lower edge of the end of the internal steel internal support 10 extending out of the wall. The internal steel support is an I-beam, therefore it includes upper and lower wings, and thus the upper and lower connecting components are needed to connect the upper and lower wings at the cut-off points of the internal steel support.

[0038] Furthermore, such as Figures 1 to 3The structure of the connecting component is further defined as shown. The connecting component 13 includes a first equilateral triangle 1, a second equilateral triangle 2, and a washer 4. One side of the first equilateral triangle 1 is fixedly connected to the side of the first section of the wall's outer inner support 9 by a high-strength bolt 3. One side of the second equilateral triangle 1 is fixedly connected to the end of the wall's inner support 10 extending out of the wall by a high-strength bolt 3. The washer 4 is positioned between the other side of the first equilateral triangle 1 and the other side of the second equilateral triangle 2. The other side of the first equilateral triangle 1 and the other side of the second equilateral triangle 2 are fixedly connected by a high-strength bolt 3 passing through the washer 4. The washer is provided because, after the steel inner support is assembled, when there is excess space in the placement gap at the pressure end, a washer 4 of corresponding thickness must be used to ensure a tight fit and prevent the steel inner support system from becoming eccentric under stress.

[0039] This invention also discloses a construction method for installing and dismantling easily detachable and assembled steel internal supports, comprising the following steps:

[0040] Step 1) Optimize the design of the internal steel support, and determine the location of the wall support node and the anti-bracing node based on the design drawings;

[0041] Step 2) Preliminary construction work for the installation of internal steel supports;

[0042] Step 3) Construction of steel columns, installation and assembly of walers and easily disassembled and assembled steel internal support components, and application of prestress;

[0043] Step 4) Construction of foundation and main structure;

[0044] Step 5) Remove the prestressed steel internal supports that are easy to disassemble and assemble.

[0045] Furthermore, during construction step 1), the location of the internal steel bracing must be rationally deployed to ensure that the internal steel bracing does not intersect with the structural columns and that the wall bracing node of the easily removable combined steel bracing is located at the basement wall. This ensures that the originally integral easily removable combined steel bracing is disconnected at the wall bracing node, facilitating subsequent removal of the easily removable combined steel bracing.

[0046] Furthermore, in step 2), the surveyors accurately mark the center point of the steel internal support according to the coordinates on the drawing, and draw a cross line with spray paint to facilitate the calibration of the position of the steel internal support after installation.

[0047] Furthermore, the assembly of the easily disassembled and assembled steel internal support with wall bracing nodes in step 3 includes the following steps:

[0048] 3.1) The easily disassembled and assembled steel internal support includes a wall support node, which is assembled from multiple sections of steel internal supports. The wall support node includes a first section of external steel internal support, an internal steel internal support, a second section of external steel internal support, and four connecting components. The two connecting components include an upper connecting component and a lower connecting component. The upper connecting component connects the upper edge of the first section of external internal support to the upper edge of the end of the internal internal support extending out of the wall. The lower connecting component connects the lower edge of the first section of external internal support to the lower edge of the end of the internal internal support extending out of the wall. The connecting components include a first-order... The first equilateral angle iron, the second equilateral angle iron, and the shim are used to fix one side of the first equilateral angle iron to the side of the first section of the wall's outer inner support using high-strength bolts. The second equilateral angle iron is fixed to one end of the wall's inner support extending out of the wall using high-strength bolts. The shim is placed between the other side of the first equilateral angle iron and the other side of the second equilateral angle iron. The first equilateral angle iron and the second equilateral angle iron are fixed to each other using high-strength bolts. This assembles the first section of the wall's outer steel inner support and the end of the wall's inner steel inner support extending out of the structural wall.

[0049] 3.2) Using the same structure as in step 3.1, the second section of the external steel internal support and the internal steel internal support extending out of the structural wall are assembled together to complete the assembly of the easily disassembled and assembled internal steel support.

[0050] Furthermore, in step 4), during the foundation construction and the pouring of the structural wall, the internal steel support is poured into the structural wall, and the internal steel support is waterproofed to avoid removing the internal steel support before the construction of this structural wall.

[0051] Furthermore, when dismantling prestressed steel internal supports that are easy to disassemble and assemble, a staged unloading method should be adopted. Before dismantling the steel supports, the prestress of the easily disassembled steel internal supports in the dismantling area must be released. During dismantling, excessive instantaneous release of prestress should be avoided to prevent localized deformation and cracking of the structure. During the prestress release process, jacks should be used to apply appropriate force to tighten the supports first, opening the pressure-bearing components and removing the force-holding box. After verification, the jacks should be released, and each wall support node and anti-support node should be dismantled sequentially. The connecting high-strength bolts should be removed, and the prestressed filling steel plate should be removed. The jacks should be gradually unloaded, pausing for a period of time before continuing unloading until completion. The first and second sections of external steel internal supports on both sides of the structural wall can be reused after the bolts are removed. Internal steel internal supports remaining in the structural wall that extend externally should be cut off with gas welding. Internal steel internal supports remaining inside the wall should not be removed and should be reinforced with waterproofing measures.

[0052] It should be stated that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to the present invention. However, such variations, as long as they do not depart from the spirit of the present invention, should be within the scope of protection of the present invention. Furthermore, some terminology used in this specification and claims is not limiting, but merely for ease of description.

Claims

1. A construction method for an easily dismantled and assembled steel internal support, characterized in that, Includes the following steps: Step 1) Optimize the design of the internal steel support, and determine the location of the wall support node and the anti-bracing node based on the design drawings; Step 2) Preliminary construction work for the installation of internal steel supports; Step 3) Construction of steel columns, installation and assembly of walers and easily disassembled and assembled steel internal support components, and application of prestress. 3.1) The easily dismantled and assembled steel internal bracing includes a wall bracing node, which is composed of multiple sections of steel internal bracing. The wall bracing node includes a first section of external steel internal bracing, an internal steel internal bracing, a second section of external steel internal bracing, and four connecting components. Two connecting components are included: an upper connecting component and a lower connecting component. The upper connecting component connects the upper edge of the first section of external steel internal bracing to the upper edge of the end of the internal steel internal bracing extending out of the wall. The lower connecting component connects the lower edge of the first section of external steel internal bracing to the lower edge of the end of the internal steel internal bracing extending out of the wall. The connecting components include the first... An equilateral triangle iron, a second equilateral triangle iron, and a washer are used to fix one side of the first equilateral triangle iron to the inner support of the first section of the external steel profile of the wall using high-strength bolts. One side of the second equilateral triangle iron is fixed to one end of the inner support of the internal steel profile of the wall extending out of the wall using high-strength bolts. A washer is placed between the other side of the first equilateral triangle iron and the other side of the second equilateral triangle iron. The other side of the first equilateral triangle iron and the other side of the second equilateral triangle iron are fixed to each other using high-strength bolts. This combines the inner support of the first section of the external steel profile of the wall with one end of the inner support of the internal steel profile of the wall extending out of the structural wall. 3.2) Using the same structure as in step 3.1, combine the second section of the external steel internal support with the internal steel internal support extending out of the structural wall at the other end to complete the combination of the wall bracing node of the easily disassembled and assembled internal steel support; Step 4) Construction of foundation and main structure; Step 5) Removal of the internal support of the prestressed easily removable combination steel section.

2. The construction method for the easily dismantled and assembled steel internal support according to claim 1, characterized in that, Before construction in step 1), the position of the steel internal support must be reasonably arranged to ensure that the steel internal support does not intersect with the structural column, and to ensure that the wall support node of the easily removable combined steel internal support is located at the basement wall, so as to ensure that the original whole easily removable combined steel internal support is broken at the wall support node, so as to facilitate the subsequent removal of the easily removable combined steel internal support.

3. The construction method for the easily dismantled and assembled steel internal support according to claim 1, characterized in that, In step 4), during the foundation construction and the pouring of the structural wall, the internal steel support is poured into the structural wall to avoid removing the internal steel support before the construction of this structural wall.

4. The construction method of the easily dismantled and assembled steel internal support according to claim 1, characterized in that, In step 5), when dismantling the prestressed steel internal supports of easily removable combinations, a graded unloading method is adopted. Before dismantling the steel supports, the prestress of the easily removable steel internal supports in the dismantling area must be released. During dismantling, excessive instantaneous release of prestress should be avoided to prevent local deformation and cracking of the structure. During the release of prestress, jacks are first used to support and tighten appropriately. The pressure-pressurizing components are first opened, and the force-holding box is removed. After checking that everything is correct, the jacks of the supports are released. Each wall support node and anti-support node is dismantled in sequence, the connecting high-strength bolts are removed, and the prestressed filling steel plate is removed. The jacks are gradually unloaded, and after a period of time, the unloading continues until it is finished. The first section of the external steel internal supports and the second section of the external steel internal supports on both sides of the structural wall are reused after the bolts are removed. The internal steel internal supports left in the structural wall that extend to the outside are cut off by gas welding. The internal steel internal supports left inside the wall are not removed and are supplemented with waterproofing measures.

5. A construction method for an easily removable and assembled steel internal support according to any one of claims 1 to 4, characterized in that, A wall support node is provided at the connection between the steel internal support (10) and the structural wall (6). The wall support node includes a first section of external steel internal support (9), an internal steel internal support (10), a second section of external steel internal support (11), and four connecting components. One end of the first section of external steel internal support (9) is fixedly connected to one end of the internal steel internal support (10) extending out of the structural wall (6) by two obliquely symmetrical connecting components. The other end of the internal steel internal support (10) extending out of the structural wall is fixedly connected to one end of the second section of external steel internal support (11) by two obliquely symmetrical connecting components. The first section of external steel internal support (9) is fixedly connected to one end of the internal steel internal support (10) extending out of the structural wall by two obliquely symmetrical connecting components. 9) One end of the steel internal support (10) extends out of the structural wall (6) and the cross section of the first inclined surface is connected to the steel internal support (10) extending out of the structural wall (6). The other end of the steel internal support (10) extends out of the structural wall (6) and the cross section of the second section of the steel internal support (11) outside the wall is connected to the second inclined surface. The first inclined surface and the second inclined surface are parallel to each other. The first inclined surface and the second inclined surface are the same as the first inclined angle and the second inclined angle between the steel internal support (10) and the steel internal support (10). The first inclined angle or the second inclined angle is between 45° and 60°. The length of the part of the steel internal support (10) extending out of the structural wall (6) is ≥10cm.

6. The construction method of the easily dismantled and assembled steel internal support according to claim 5, characterized in that, A bracing node is provided at the connection between the steel inner support (10) and the waler (5). The bracing node includes a first section of steel inner support (9) outside the wall, a steel inner support (12) outside the waler, and two connecting components. The other end of the first section of steel inner support (9) outside the wall is fixedly connected to one end of the steel inner support (12) outside the waler through two obliquely symmetrical connecting components. The other end of the steel inner support (12) outside the waler is welded and fixed to the embedded part inside the waler (5). The connection section between the other end of the first section of steel inner support (9) outside the wall and one end of the steel inner support (12) outside the waler is a third inclined surface.

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