Detachable steel support changing conversion device, inner support structure and bolt stress analysis method

Abstract

The invention relates to a detachable steel replacement support conversion device, an inner supporting structure and a bolt stress analysis method.The detachable steel replacement support conversion device comprises a support, one side of the support is a vertical plane, the other side of the support is an arc-shaped face, the vertical plane and the arc-shaped face are distributed on the two opposite sides of the support, the vertical plane is used for installing a steel replacement support, and the arc-shaped face is used for installing a bolt; the protruding direction of the arc-shaped face is opposite to the vertical plane, and the arc-shaped face is used for being attached to an arc-shaped side wall. The plurality of pre-embedded sleeves are distributed at intervals along the outline of the support and are used for being embedded in an arc-shaped side wall; the plurality of fixing bolts penetrate through the arc-shaped surfaces and are in bolted connection with the interiors of the corresponding embedded sleeves; and the fixed bracket is fixed on the vertical plane, and the fixed bracket is used for supporting a steel replacement support. The vertical plane of the support facilitates installation and fixation of the steel replacement support, the arc-shaped surface can be tightly attached to the arc-shaped side wall of the main body structure, and leveling treatment does not need to be conducted on the arc-shaped surface.

Description

Technical Field

[0001] The present application relates to the field of geotechnical engineering, and specifically to a detachable steel support conversion device, an internal support structure and a bolt force analysis method. Background Art

[0002] Support-type retaining structures are widely used in foundation pit projects. The entire structural system can be divided into retaining structures and internal support structures. The internal support structure includes the main load-bearing components such as the crown beam, waist beam, concrete support, steel support, steel replacement support, columns and column piles. Among them, the steel replacement support is a support component that replaces the previous support during the main structure construction process when the previous support affects the subsequent structure construction.

[0003] In the related art, the end of the steel brace needs to be supported on the surface of the main structure. There are several problems in the construction process: (1) The construction process is cumbersome and inefficient. The end of the steel brace is fixed by a steel bracket. It is necessary to embed a steel plate at the corresponding position when the side wall of the main structure is cast, and then weld the fixed bracket to the embedded steel plate. After the steel brace is removed, the fixed bracket needs to be cut and the surface of the embedded steel plate needs to be polished; (2) The embedded steel plate affects the appearance. The embedded steel plate is usually 1 meter or more wide and cannot be removed later. It is exposed on the surface of the side wall of the main structure and usually requires anti-corrosion treatment and decoration; (3) The amount of abandoned projects is large. The curved surface of the main structure needs to be leveled first, and the embedded steel plate and fixed bracket cannot be recovered later; (4) There are safety hazards. Improper on-site welding operations can easily cause safety accidents such as fire and explosion. Summary of the invention

[0004] The present application provides a detachable steel support conversion device, an internal support structure and a bolt force analysis method, which can solve the technical problems of complicated construction procedures, embedded steel plates affecting the appearance, and a large amount of abandoned projects during the steel support erection process.

[0005] In a first aspect, an embodiment of the present application provides a detachable steel support replacement conversion device, which includes:

[0006] A support, one side of the support is a vertical plane, and the other side is a curved surface, the vertical plane and the curved surface are distributed on opposite sides of the support, the vertical plane is used to install a steel brace, the convex direction of the curved surface is facing away from the vertical plane, and the curved surface is used to fit the curved side wall;

[0007] A plurality of embedded sleeves, which are distributed at intervals along the outline of the support and are used to be embedded in the curved side wall;

[0008] A plurality of fixing bolts, wherein the fixing bolts penetrate the arc-shaped surface and are bolted into the corresponding embedded sleeves;

[0009] A fixed bracket is fixed to the vertical plane, and is used to support the steel replacement support.

[0010] In combination with the first aspect, in one embodiment, the support includes:

[0011] A vertical steel plate, one end surface of which forms the vertical plane;

[0012] A plurality of connecting steel plates, one end of each of the connecting steel plates being fixed to the other end surface of the vertical steel plate;

[0013] An arc-shaped steel plate is fixed to the other end of the plurality of connecting steel plates, and the arc-shaped steel plate constitutes the arc-shaped surface.

[0014] In combination with the first aspect, in one implementation, when projected along the end surface direction of the vertical steel plate, the plurality of connecting steel plates are distributed in a grid shape.

[0015] In combination with the first aspect, in one embodiment, the arc-shaped steel plate includes a plurality of arc-shaped unit plates, the plurality of arc-shaped unit plates are welded together to form the arc-shaped surface, and the plurality of arc-shaped unit plates are welded to a plurality of connecting steel plates.

[0016] In combination with the first aspect, in one embodiment, the fixing bracket includes:

[0017] A support plate, wherein at least two vertical plates are fixed at intervals, and the vertical plates are used to improve the rigidity of the support plate and limit the displacement of the steel support.

[0018] In a second aspect, an embodiment of the present application provides an internal support structure, which includes at least two groups of detachable steel support conversion devices as described above.

[0019] In combination with the second aspect, in one embodiment, the inner support structure further includes:

[0020] Steel support changer, the steel support changer is fixed between the vertical planes of the two sets of detachable steel support changer conversion devices.

[0021] In a third aspect, the embodiment of the present application provides a bolt force analysis method applicable to the detachable steel brace conversion device as described above, which comprises the following steps:

[0022] Based on the deadweight of the steel replacement brace, the temporary load acting on the steel replacement brace during construction, and the number of fixing bolts, the shear force on the i-th fixing bolt when the steel replacement brace is erected but has not yet played a supporting role is calculated;

[0023] Based on the deadweight of the steel brace, the temporary load acting on the steel brace during construction, the number of fixing bolts, the width of the fixing bracket along the axial direction of the steel brace, and the vertical distance from the ith fixing bolt to the bottom row of fixing bolts, the tension on the ith fixing bolt when the steel brace is erected but has not yet played a supporting role is calculated;

[0024] Based on the shear force and tension applied to the i-th fixing bolt when the steel replacement support has been erected but has not yet played its supporting role, a fixing bolt with appropriate strength specifications is selected.

[0025] In combination with the third aspect, in one embodiment, after selecting a fixing bolt with a suitable strength specification based on the shear force and tension force on the i-th fixing bolt when the steel replacement support has not yet played a supporting role after being erected, the method further includes:

[0026] Based on the deadweight of the steel brace, the temporary load acting on the steel brace during construction, the basic combined axial force of the steel brace, the friction coefficient between the concrete and the curved surface, the angle between the tangent line of the curved side wall surface at the i-th fixing bolt and the vertical direction, and the number of fixing bolts, the shear force on the i-th fixing bolt when the steel brace fully plays its supporting role is calculated;

[0027] Based on the shear force on the ith fixing bolt when the steel brace fully plays its supporting role, check whether the strength of the fixing bolt meets the requirements.

[0028] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0029] The vertical plane of the support is convenient for installing and fixing the steel replacement support, while the curved surface can fit closely with the curved side wall of the main structure, without the need to level the curved surface, which improves the flexibility and adaptability of the installation and ensures the beauty of the wall. Multiple embedded sleeves are distributed along the contour of the support and embedded in the curved side wall. This layout method not only ensures the stable support of the support, but also avoids the problem of structural stress concentration caused by excessive concentration of embedded parts. Compared with traditional embedded steel plates, the design of embedded sleeves is more convenient for later disassembly and recycling, reducing the amount of waste engineering. The fixed bolts penetrate the curved surface of the support and are bolted to the corresponding embedded sleeves, realizing a reliable connection between the support and the main structure. It is not only easy to install, but also easy to disassemble, which is convenient for later maintenance and management. The fixed bracket and the support are integrated into one design, which makes the installation and disassembly of the steel replacement support more convenient, without the need for complex welding and cutting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a front view structural schematic diagram of a detachable steel support replacement conversion device;

[0032] Figure 2 for Figure 1 The left structural diagram of ;

[0033] Figure 3 It is a schematic diagram of the installation of the detachable steel brace conversion device on the curved side wall;

[0034] Figure 4 This is the bolt force analysis diagram after the steel replacement support is erected and has not yet played a supporting role;

[0035] Figure 5 This is a force analysis diagram of the fixing bolts located above the center of the arc when the steel replacement support fully plays its supporting role after being erected;

[0036] Figure 6 This is a force analysis diagram of the fixing bolts located below the center of the arc when the steel replacement support is fully functional after erection.

[0037] In the figure: 1. support; 11. vertical steel plate; 12. connecting steel plate; 13. arc-shaped steel plate; 2. embedded sleeve; 3. fixing bolt; 4. fixing bracket; 41. support plate; 42. vertical plate; 5. steel replacement support; 6. arc-shaped side wall. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The embodiments of the present application provide a detachable steel support conversion device, an internal support structure and a bolt force analysis method, which can solve the technical problems of complicated construction procedures, embedded steel plates affecting the appearance, and a large amount of abandoned projects during the steel support erection process.

[0040] First, as Figure 1 , Figure 2 and Figure 3As shown, an embodiment of the present application provides a detachable steel-changing support conversion device, which includes: a support 1, on two opposite sides of the support 1, the first side is a vertical plane, the vertical plane is used to install the steel-changing support 5, and the second side is an arcuate surface, the convex direction of the arcuate surface is back to the vertical plane, and the arcuate surface is used to fit the arcuate side wall 6; a plurality of embedded sleeves 2, the plurality of embedded sleeves 2 are distributed at intervals along the contour of the support 1, and are used to be embedded in the arcuate side wall 6; a plurality of fixing bolts 3, the fixing bolts 3 pass through the arcuate surface, and are bolted to the corresponding embedded sleeves 2; a fixing bracket 4, the fixing bracket 4 is fixed to the vertical plane, and the fixing bracket 4 is used to support the steel-changing support 5.

[0041] In this embodiment, the design of the support 1 cleverly combines the vertical plane and the arc surface. The vertical plane is convenient for installing and fixing the steel replacement support 5, while the arc surface can fit closely with the arc side wall 6 of the main structure, without the need to level the arc surface, thereby improving the flexibility and adaptability of the installation. Multiple embedded sleeves 2 are distributed along the contour of the support 1 and embedded in the arc side wall 6. This layout method not only ensures the stable support of the support 1, but also avoids the problem of structural stress concentration caused by excessive concentration of embedded parts. Compared with traditional embedded steel plates, the design of the embedded sleeve 2 is more convenient for later disassembly and replacement, reducing the amount of abandoned projects. The fixed bolts 3 penetrate the arc surface of the support 1 and are bolted to the corresponding embedded sleeves 2, thereby realizing a reliable connection between the support 1 and the main structure. This connection method is not only simple to install, but also easy to disassemble, which is convenient for later maintenance and management. The fixed bracket 4 is fixed to the vertical plane of the support 1 to support the steel replacement support 5. This design makes the installation and disassembly of the steel replacement support more convenient, without the need for complex welding and cutting operations. The improved solution eliminates the need for embedded steel plates, welded fixing brackets, and subsequent cutting and grinding processes, greatly simplifying the construction process, improving construction efficiency, and reducing the risk of open flame operations on site. The design of the embedded sleeve 2 and the fixing bolt 3 avoids the poor appearance caused by the exposure of the embedded steel plate and reduces the workload of later decoration. At the same time, since there is no need to level the curved surface, the original shape of the main structure is maintained, improving the overall aesthetics. The fixing bolt 3 is removable and reusable, reducing the generation of waste. In addition, since there is no need to level the curved surface, the amount of waste engineering caused by leveling is also reduced. The detachable design of the steel support conversion device allows it to be easily dismantled and used in other projects after completing its supporting function, improving the utilization rate of materials.

[0042] In combination with the first aspect, in one embodiment, Figure 1 , Figure 2 and Figure 3As shown, the support 1 includes: a vertical steel plate 11, one end surface of the vertical steel plate 11 forms a vertical plane; a plurality of connecting steel plates 12, one end of the plurality of connecting steel plates 12 is fixed to the other end surface of the vertical steel plate 11; an arc steel plate 13, the arc steel plate 13 is fixed to the other end of the plurality of connecting steel plates 12, the arc steel plate 13 is the main bearing part of the support 1, and one end surface of the vertical steel plate 11 forms a vertical plane for directly installing and fixing the steel support 5. The vertical steel plate 11 has sufficient strength and rigidity to ensure the stability and safety of the steel support 5 during construction.

[0043] In this embodiment, the connecting steel plate 12 serves as a transition portion between the vertical steel plate 11 and the arc-shaped steel plate 13, one end of which is fixed to the other end face of the vertical steel plate 11, and the arc-shaped steel plate 13 is fixed to the other end of the plurality of connecting steel plates 12, forming an arc-shaped surface that fits the arc-shaped side wall 6 of the main structure. The design of the arc-shaped steel plate 13 enables the support to fit tightly to the arc-shaped side wall 6, without the need for additional leveling of the arc-shaped surface, thus simplifying the construction process. Through the combined design of the vertical steel plate 11, the connecting steel plate 12, and the arc-shaped steel plate 13, the support 1 can be accurately installed on the arc-shaped side wall 6 of the main structure, thus improving the accuracy and stability of the installation. At the same time, this combined structure also enhances the bearing capacity of the support, ensuring the safe use of the steel support 5 during the construction process.

[0044] In combination with the first aspect, in one embodiment, Figure 2 As shown, projected along the end surface direction of the vertical steel plate 11, multiple connecting steel plates 12 are distributed in a grid shape.

[0045] In this embodiment, along the end surface direction of the vertical steel plate 11, a plurality of connecting steel plates 12 are distributed in a grid-like form. This distribution method not only enhances the structural strength and stability of the support 1, but also provides it with a better stress distribution and transfer path. The connecting steel plates 12 distributed in a grid form a stable support frame, which effectively enhances the overall structural strength and stability of the support 1. This design enables the support 1 to withstand greater loads and deformations, ensuring the safe use of the steel support 5 during construction. The connecting steel plates 12 distributed in a grid can transfer and disperse stress more evenly, avoiding the occurrence of stress concentration. This design helps to reduce local damage and deformation of the support 1 during the stress process, thereby extending its service life.

[0046] In combination with the first aspect, in one embodiment, the arc-shaped steel plate 13 includes a plurality of arc-shaped unit plates, the plurality of arc-shaped unit plates are welded together to form an arc-shaped surface, and the plurality of arc-shaped unit plates are welded to a plurality of connecting steel plates 12 .

[0047] In this embodiment, the arc steel plate 13 is not made of a single large steel plate, but is formed by welding a plurality of arc unit plates. These arc unit plates are customized according to the actual curvature and size of the arc side wall 6, and then connected together by welding technology to form a complete arc surface. The arc unit plates and the arc unit plates and the connecting steel plate 12 are connected by welding. The welding connection not only ensures the structural strength and stability of the arc steel plate 13, but also enables it to fit the arc side wall 6 closely, thereby improving the accuracy and reliability of the installation. The arc steel plate 13 formed by welding a plurality of arc unit plates can more flexibly adapt to the curvature and shape of different arc side walls 6. Each arc unit plate can be customized according to the needs, and then combined together to form an arc surface that fits the arc side wall 6 perfectly. The method of welding a plurality of arc unit plates can reduce the manufacturing difficulty of the arc steel plate 13. Compared with manufacturing a complete large arc steel plate, it is easier and more convenient to manufacture a plurality of small arc unit plates, and it is easier to ensure the quality. Multiple arc-shaped unit panels can be transported and installed separately, which reduces the difficulty of transportation and installation. On site, it is only necessary to weld and connect the arc-shaped unit panels in a predetermined order and position, thereby improving construction efficiency.

[0048] In combination with the first aspect, in one embodiment, the fixing bracket 4 includes: a support plate 41 , at least two vertical plates 42 are fixed to the support plate 41 at intervals, and the vertical plates 42 are used to improve the rigidity of the support plate 41 and limit the displacement of the steel support 5 .

[0049] In this embodiment, the support plate 41 is the main load-bearing component of the fixed bracket 4, which provides a stable support surface. Vertical plates 42 are fixed at both ends of the support plate 41, and the vertical plates 42 further enhance the structural rigidity of the support plate 41. The fixed bracket 4 provides stable support and fixation for the object to be lifted through at least two vertical plates 42, ensuring that it will not move or overturn during use.

[0050] In combination with the first aspect, in one embodiment, Figure 2 As shown, there are four vertical plates 42, which are arranged side by side and spaced apart. Along the spacing direction of the four vertical plates 42, the heights of the first and last vertical plates 42 are the same, the heights of the second and third vertical plates 42 are the same, and the height of the first vertical plate 42 is higher than the height of the second vertical plate 42. The four vertical plates 42 are used to increase the rigidity of the support plate 41 and limit the displacement of the steel support 5. The number of vertical plates 42 depends on the situation and can be increased or decreased accordingly according to the weight of the steel support 5.

[0051] In a second aspect, an embodiment of the present application provides an internal support structure, which includes at least two sets of detachable steel support conversion devices as mentioned above.

[0052] In this embodiment, the internal support structure is mainly composed of multiple groups (at least two groups) of detachable steel support conversion devices. These conversion devices, as the basic units of the internal support structure, jointly assume the role of supporting and converting loads through a specific connection method and layout. Each group of detachable steel support conversion devices has the ability to be independently disassembled and reinstalled. This design not only facilitates rapid assembly and disassembly at the construction site, but also greatly improves construction efficiency and flexibility. When it is necessary to adjust the support position or replace damaged parts, the operation can be completed quickly, reducing the impact on the overall construction progress.

[0053] In combination with the second aspect, in one embodiment, the inner support structure further comprises: a steel support 5, wherein the steel support 5 is fixed between the vertical planes of the two sets of detachable steel support conversion devices.

[0054] In this embodiment, a steel support 5 is fixed between the vertical planes of the two groups of detachable steel support conversion devices. The steel support 5, as a reinforcing member, can further enhance the overall stability and load-bearing capacity of the inner support structure. The steel support 5 tightly connects the two groups of detachable steel support conversion devices together to form a more stable support structure, effectively preventing the collapse of the entire support structure due to single point failure. Through the transmission effect of the steel support 5, the load can be more evenly distributed to each conversion device, avoiding the occurrence of local overload and improving the safety performance of the support structure. The addition of the steel support 5 makes the inner support structure more adaptable to complex construction environments and load conditions. Whether in a narrow space or in the case of needing to withstand a large load, the actual needs can be met by adjusting the specifications and layout of the steel support 5.

[0055] Thirdly, Figure 4 As shown, the embodiment of the present application provides a bolt force analysis method applicable to the above-mentioned detachable steel support conversion device, which includes the following steps:

[0056] S1: Based on the deadweight of the steel brace 5, the temporary load acting on the steel brace 5 during construction, and the number of fixing bolts 3, the shear force on the i-th fixing bolt 3 when the steel brace 5 is erected but has not yet played a supporting role is calculated;

[0057] S2: Based on the deadweight of the steel brace 5, the temporary load acting on the steel brace 5 during construction, the number of fixing bolts 3, the width of the fixing bracket 4 along the axial direction of the steel brace 5, and the vertical distance from the i-th fixing bolt 3 to the bottom row of fixing bolts 3, calculate the tension on the i-th fixing bolt 3 when the steel brace 5 is erected but has not yet played a supporting role;

[0058] S3: Based on the shear force and tension force on the i-th fixing bolt 3 after the steel replacement support 5 is erected but has not yet played a supporting role, select a fixing bolt 3 with a suitable strength specification.

[0059] In this embodiment, in S1, the shear force on the i-th fixing bolt 3 is determined when the steel replacement support 5 is erected and has not yet played a supporting role. The factors to be considered include the deadweight of the steel replacement support 5, the temporary load acting on the steel replacement support 5 during construction, and the number of fixing bolts 3. Through mechanical analysis and calculation, these factors are comprehensively considered to obtain the shear force value of the i-th fixing bolt 3 under specific conditions. In S2, the tension is calculated. In addition to the deadweight of the steel replacement support 5 and the temporary load during construction, the width of the fixed bracket 4 along the axial direction of the steel replacement support 5 and the vertical distance from the i-th fixing bolt 3 to the bottom row of fixing bolts 3 must also be considered. Through mechanical analysis and calculation, all relevant factors are comprehensively considered to obtain the tension value of the i-th fixing bolt 3 under specific conditions. S3 selects a suitable strength specification for the i-th fixing bolt 3 based on the shear force and tension values ​​calculated in the first two steps to ensure that the strength of the selected bolt can meet the force requirements in actual use, while considering economy. This bolt stress analysis method is crucial to ensure the safety and stability of the removable steel brace conversion device. By accurately calculating the stress of each fixing bolt and selecting the appropriate bolt specifications accordingly, it is possible to effectively avoid damage or failure of the bolts due to excessive stress, thereby ensuring the stability and durability of the entire structure.

[0060] Specifically, Figure 4 As shown, the force analysis of the fixing bolt 3 is performed, and the calculation formula of the shear force and the tension force on the fixing bolt 3 when the steel replacement support 5 is erected but has not yet played a supporting role is analyzed:

[0061]

[0062] Where N vi is the shear force on the i-th fixing bolt 3; N ti is the tension exerted on the i-th fixing bolt 3; V is the basic combined shear force, including the deadweight of the steel support 5 and the temporary load that may act on the steel support 5 during construction; b is the width of the fixing bracket 4; zi is the vertical distance from the i-th fixing bolt 3 to the bottom row of fixing bolts 3; n is the number of fixing bolts 3.

[0063] In conjunction with the third aspect, in one implementation, after S3, the following steps are further included:

[0064] S4: Based on the deadweight of the steel brace 5, the temporary load acting on the steel brace 5 during construction, the basic combined axial force of the steel brace 5, the friction coefficient between the concrete and the curved surface, the angle between the tangent line of the curved side wall 6 at the i-th fixing bolt 3 and the vertical direction, and the number of fixing bolts 3, calculate the shear force on the i-th fixing bolt 3 when the steel brace 5 fully plays its supporting role;

[0065] S5: According to the shear force on the i-th fixing bolt 3 when the steel brace 5 fully plays its supporting role, check whether the strength of the fixing bolt 3 meets the requirements.

[0066] In this implementation, S4 calculates the shear force of the basic combined axial force to determine the shear force on the i-th fixing bolt 3 when the steel replacement support 5 fully plays its supporting role. The factors considered include the deadweight of the steel replacement support 5, the temporary load acting on the steel replacement support 5 during construction, the basic combined axial force of the steel replacement support 5, the friction coefficient between the concrete and the curved surface, the angle between the tangent of the surface of the curved side wall 6 at the i-th fixing bolt 3 and the vertical (which affects the direction and magnitude of the shear force) and the number of fixing bolts 3 (used to distribute the total shear force). By comprehensively considering the above factors, a mechanical analysis is performed to calculate the shear force value of the i-th fixing bolt 3 under the basic combined axial force. S5 ensures that the selected bolts can still meet the force requirements when the steel replacement support 5 fully plays its supporting role. If the shear force calculated in step S5 is greater than the bearing capacity of the bolt in step S3, it means that the originally selected bolt specifications are insufficient to meet the actual force requirements. In this case, it is necessary to reselect fixing bolts 3 with appropriate strength specifications to ensure that they can withstand greater shear forces while meeting the requirements of safety and economy. These extended steps are essential to ensure the safety and stability of the removable steel bracing conversion device when it fully plays its supporting role. By accurately calculating the stress of the bolts under the basic combined axial force and reselecting the bolt specifications accordingly (if necessary), the risk of bolt damage or failure can be further reduced, thereby ensuring the stability and durability of the entire structure.

[0067] Specifically, the force analysis of the fixing bolt 3 is performed, and the calculation formula of the shear force on the bolt when the steel support 5 fully plays the supporting role is analyzed:

[0068] like Figure 5 As shown, when the fixing bolt 3 is located above the center of the arc:

[0069]

[0070] like Figure 6 As shown in the figure, when the fixing bolt is below the center of the arc:

[0071]

[0072] Where N vi is the shear force exerted on the i-th fixing bolt 3; V is the basic combined shear force, including the deadweight of the steel brace 5 and the temporary load that may act on the steel brace 5 during construction; N is the basic combined axial force; μ is the friction coefficient between concrete and steel components; θ is the angle between the tangent line of the surface of the arc-shaped side wall 6 at the i-th fixing bolt 3 and the vertical; n is the number of fixing bolts 3.

[0073] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0074] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0075] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A detachable steel support conversion device, characterized in that: It includes: A support (1), one side of the support (1) is a vertical plane, and the other side is a curved surface, the vertical plane and the curved surface are distributed on two opposite sides of the support (1), the vertical plane is used to install a steel support (5), the convex direction of the curved surface is away from the vertical plane, and the curved surface is used to fit the curved side wall (6); A plurality of embedded sleeves (2), wherein the plurality of embedded sleeves (2) are distributed at intervals along the outline of the support (1) and are used to be embedded in the arc-shaped side wall (6); A plurality of fixing bolts (3), wherein the fixing bolts (3) penetrate the arc-shaped surface and are bolted to the corresponding embedded sleeves (2); A fixed bracket (4), wherein the fixed bracket (4) is fixed to the vertical plane, and the fixed bracket (4) is used to support the steel replacement support (5).

2. The detachable steel support conversion device according to claim 1 is characterized in that: The support (1) comprises: A vertical steel plate (11), wherein one end surface of the vertical steel plate (11) forms the vertical plane; A plurality of connecting steel plates (12), one end of each of the connecting steel plates (12) being fixed to the other end surface of the vertical steel plate (11); An arc-shaped steel plate (13), wherein the arc-shaped steel plate (13) is fixed to the other end of the plurality of connecting steel plates (12), and the arc-shaped steel plate (13) constitutes the arc-shaped surface.

3. The detachable steel support conversion device according to claim 2 is characterized in that: Projected along the end surface direction of the vertical steel plate (11), the plurality of connecting steel plates (12) are distributed in a grid shape.

4. The detachable steel support conversion device according to claim 2, characterized in that: The arc-shaped steel plate (13) comprises a plurality of arc-shaped unit plates, the plurality of arc-shaped unit plates are welded together to form the arc-shaped surface, and the plurality of arc-shaped unit plates are welded to a plurality of connecting steel plates (12).

5. The detachable steel support conversion device according to claim 1 is characterized in that: The fixing bracket (4) comprises: A support plate (41), wherein the support plate (41) is fixed with at least two vertical plates (42) at intervals, and the vertical plates (42) are used to improve the rigidity of the support plate (41) and limit the displacement of the steel support (5).

6. An internal support structure, characterized in that: It comprises at least two sets of detachable steel support replacement conversion devices as described in claim 1.

7. The inner support structure according to claim 6, characterized in that: The inner support structure also includes: A steel support (5) is fixed between the vertical planes of two groups of detachable steel support conversion devices.

8. A bolt force analysis method applicable to the detachable steel brace conversion device as claimed in claim 1, characterized in that: It includes the following steps: Based on the deadweight of the steel replacement support (5), the temporary load acting on the steel replacement support (5) during construction, and the number of fixing bolts (3), the shear force on the i-th fixing bolt (3) when the steel replacement support (5) is erected but has not yet played a supporting role is calculated; Based on the deadweight of the steel replacement support (5), the temporary load acting on the steel replacement support (5) during construction, the number of fixing bolts (3), the width of the fixing bracket (4) along the axial direction of the steel replacement support (5), and the vertical distance from the i-th fixing bolt (3) to the bottom row of fixing bolts (3), the tensile force on the i-th fixing bolt (3) when the steel replacement support (5) is erected but has not yet played a supporting role is calculated; Based on the shear force and tension force on the i-th fixing bolt (3) after the steel replacement support (5) is erected and before it plays a supporting role, a fixing bolt (3) with a suitable strength specification is selected.

9. The bolt force analysis method of the detachable steel brace replacement conversion device according to claim 8 is characterized in that: After selecting a fixing bolt (3) with a suitable strength specification based on the shear force and tension force on the i-th fixing bolt (3) when the steel replacement support (5) has been erected but has not yet played a supporting role, the method further includes: Based on the deadweight of the steel support (5), the temporary load acting on the steel support (5) during construction, the basic combined axial force of the steel support (5), the friction coefficient between the concrete and the curved surface, the angle between the tangent line of the curved side wall (6) at the i-th fixing bolt (3) and the vertical direction, and the number of fixing bolts (3), the shear force on the i-th fixing bolt (3) when the steel support (5) fully plays its supporting role is calculated; According to the shear force exerted on the i-th fixing bolt (3) when the steel replacement support (5) fully plays its supporting role, it is checked whether the strength of the fixing bolt (3) meets the requirements.

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