Reinforcing method for adjustable self-adaptive installation outdoor platform steel structure

Abstract

The invention discloses an adjustable self-adaptive installation outdoor platform steel structure reinforcing method, and relates to the field of existing building reinforcement, and the reinforcing method is realized based on a triangular support system composed of a horizontal rod piece, an adjustable diagonal bracing structure and a wall anchoring structure. Wherein the adjustable diagonal bracing structure is arranged along the supporting vertical face and forms a main force bearing path, and the horizontal rod piece makes contact with the bottom of the outdoor platform and forms a horizontal force transmission path for supporting the top. The reinforcing method comprises the following steps that the wall anchoring structure is installed; assembling and supporting the triangular system; the supporting height is adjusted, and the platform is jacked; filling gaps and installing guarantee measures; according to the reinforcing method, a self-adaptive adjustment and multi-scene adaptive modular reinforcing scheme is formed through a triangular supporting system with the synergistic effect of a horizontal rod piece, an adjustable diagonal bracing structure and a wall anchoring structure, the platform deformation requirement can be accurately matched, and dynamic stress balance is achieved; and the comprehensive requirements of safe, efficient and economical reinforcement of the existing building outdoor platform are met.

Description

Technical Field

[0001] This invention belongs to the field of existing building reinforcement, specifically a method for reinforcing outdoor platform steel structures with adjustable and adaptive installation. Background Technology

[0002] As urbanization shifts from incremental construction to stock renewal, a large number of existing buildings are gradually entering a period of structural performance decline. Their attached outdoor platform structures (including floor balconies, roof eaves, etc.) are exposed to the natural environment for a long time and bear historical loads, and generally face the dual challenges of structural safety and functional degradation.

[0003] Outdoor platforms, serving as extended functional spaces within a building (such as drying areas or rooftop equipment levels), typically consist of a platform slab, surrounding beams, and a lower support system. After prolonged service, common defects include:

[0004] Material performance degradation: Concrete compressive strength decreases due to carbonation and chloride ion corrosion, and steel bars lose ductility and cross-section due to corrosion.

[0005] Structural damage: The platform slab undergoes downward deflection due to long-term localized loading, temperature stress, or uneven foundation settlement (the local settlement can reach 10-30 mm), accompanied by through or non-through cracks (the width often exceeds 0.2 mm, affecting the structural durability).

[0006] Insufficient load-bearing capacity: The original design standards are based on early specifications (such as low load values ​​and conservative safety factors), which are difficult to meet the current needs of residents (such as additional loads such as air conditioner outdoor units and photovoltaic equipment).

[0007] Such defects not only affect the normal use of the platform, but may also cause safety accidents such as partial collapse and falling objects, so it is urgent to restore its load-bearing capacity and structural stability through scientific reinforcement methods.

[0008] Currently, the industry typically employs the following methods to reinforce such outdoor platforms:

[0009] The method of reinforcing with newly added concrete cantilever members: This method forms a supporting frame by adding new concrete cantilever beams and structural columns or ring beams. Although it can provide sufficient load-bearing capacity, it has inherent disadvantages such as a large amount of on-site wet work, a long construction period, and serious impact on residents' normal lives. In addition, the self-weight of the newly added concrete members is large, which may cause additional loads on the original structure, and the newly added structural columns require foundations, making construction complex and costly.

[0010] Traditional external steel support reinforcement method: This method uses steel supports welded or bolted on-site for support. While it has the advantage of relatively convenient construction, it has two main technical bottlenecks: First, the support length is fixed or the adjustment range is limited, making it unable to accurately adapt to the platform bottom surface that has already deflected. This results in an initial gap between the support and the platform, making it impossible to achieve immediate and effective coordinated force distribution, and may even cause secondary impact on the platform under load. Second, the traditional bolt hole adjustment method is crude, making it difficult to achieve precise control of the jacking force. The support effect depends on the experience of the construction personnel, resulting in insufficient reliability and consistency.

[0011] Against this backdrop, there is an urgent need for an outdoor platform steel structure reinforcement solution that can adaptively adjust the support height, is compatible with multiple types of wall anchoring, and is easy to construct. Summary of the Invention

[0012] The purpose of this invention is to provide an adjustable and adaptive installation method for reinforcing outdoor platform steel structures, in order to solve the problems of complex reinforcement construction, low support accuracy, and insufficient long-term stability in the existing technology.

[0013] To achieve the above objectives, the present invention provides the following technical solution: an adjustable and adaptive installation method for reinforcing the steel structure of an outdoor platform. The reinforcement method is based on a triangular support system consisting of horizontal members, an adjustable diagonal bracing structure, and a wall anchoring structure. The adjustable diagonal bracing structure is arranged along the support facade and forms the main load-bearing path. The horizontal members contact the bottom of the outdoor platform and form a horizontal force transmission path at the top of the support. The wall anchoring structure includes a base steel plate and through-bolts. The horizontal members form a hinged joint through pins and lugs and are connected to the top of the adjustable diagonal bracing structure.

[0014] The reinforcement method includes the following steps:

[0015] Step 1: Install the wall anchoring structure;

[0016] Step 2: Assemble the support triangle system; Hinge the top of the horizontal bar and the adjustable diagonal brace structure with pins and ear plates, and then fix the end of the horizontal bar and the bottom of the adjustable diagonal brace structure to the base steel plate respectively.

[0017] Step 3: Adjust the support height and tighten the platform; by adjusting the length of the adjustable diagonal brace structure, make the horizontal bar press upwards and tighten against the bottom of the outdoor platform, and then lock the adjustable diagonal brace structure;

[0018] Step 4: Fill the gaps and install support measures; fill the gaps with cement mortar and install lateral bracing to ensure the out-of-plane stability of the support system.

[0019] Preferably, in step one, differentiated anchoring methods are used for different wall types:

[0020] If the wall is a masonry structure, the specific method for installing the wall anchoring structure is as follows: set angle steel at the corner of the wall, use through bolts to pass through the base steel plate and the flange of the angle steel in sequence, and tighten them with nuts;

[0021] Masonry structures (such as brick walls) have decent compressive strength, but their load-bearing capacity is dispersed, with weak local tensile and shear strength. Directly using through-bolts to fasten the base steel plate can easily cause individual bricks or mortar joints to be crushed under the huge concentrated load. This invention, by adding angle steel, distributes the concentrated force of the bolts across a larger area of ​​the masonry wall through the flanges of the angle steel, transforming the point load into a surface load. This effectively avoids localized crushing of the masonry wall and ensures the long-term effectiveness of the anchorage.

[0022] If the wall is a concrete structure, the specific method for installing the wall anchoring structure is as follows: use through bolts to pass through the base steel plate, and anchor the through bolts to the concrete wall by means of rebar or tie rods.

[0023] Concrete structures possess high compressive and tensile strength and integrity. Therefore, no additional load-distributing components are required. This invention employs the most direct method—rebar anchoring or tie rods—to tightly integrate the anchoring system with the concrete wall. This not only simplifies the construction, reduces the number of components and installation steps, but also fully utilizes the high load-bearing capacity of the concrete wall itself, resulting in faster construction and lower costs.

[0024] Preferably, the adjustable diagonal brace structure has two sets of diagonal brace bodies, fastening nuts, and interlocking lower and upper diagonal brace sections. The outer diameter of the upper diagonal brace section is smaller than the inner diameter of the lower diagonal brace section. Multiple sets of bolt holes are correspondingly provided on the pipe walls of the lower and upper diagonal brace sections. The fastening nuts pass through the bolt holes and are used to adjust and lock the length of the lower and upper diagonal brace sections.

[0025] Preferably, the two sets of diagonal bracing main bodies are arranged in a V-shape within the supporting facade, forming a stable triangular force-bearing system together with the horizontal members and the base steel plate. The V-shaped layout distributes the concentrated load to two anchor points or a wider anchor area, avoiding stress concentration and making the force transmitted to the original building wall more gradual and uniform, reducing the adverse effects on the original wall and enhancing the safety of the reinforcement scheme.

[0026] Preferably, in step three, after adjusting the support height, a gap of ≥20mm is maintained between the horizontal member and the bottom of the outdoor platform, which is filled with cement mortar in step four. Cement mortar, as a quasi-brittle material, possesses a certain degree of deformation capacity at the microscopic level and can act as a stress buffer layer. When loads are transferred, this interface enables a smooth transition of force, effectively absorbing and redistributing local peak stresses, fundamentally avoiding the risk of concrete crushing or masonry collapse at the bottom of the platform due to point or line contact.

[0027] Preferably, the top end of the lower section of the diagonal brace and the bottom end of the upper section of the diagonal brace are respectively provided with internal threads and external threads. The adjustable diagonal brace structure also has a fine-tuning bushing. The outer side of the fine-tuning bushing is a positive thread and mates with the internal thread provided at the top end of the lower section of the diagonal brace. The inner side of the fine-tuning bushing is a negative thread and mates with the external thread at the bottom end of the upper section of the diagonal brace.

[0028] Preferably, the outer surface of the middle part of the fine-tuning bushing is machined with knurling or wrench holes to facilitate tool rotation, and the contact end face between the fine-tuning bushing and the lower section of the diagonal brace integrates an annular piezoelectric sensor film and a digital display powered by a micro battery.

[0029] Compared with existing technologies, the present invention has the following advantages: The present invention constructs a modular reinforcement solution that is adaptive and adaptable to multiple scenarios through a triangular support system consisting of horizontal members, adjustable diagonal bracing, and wall anchoring structures. This system can accurately match the platform's deformation requirements and achieve dynamic stress balance, meeting the comprehensive needs of safe, efficient, and economical reinforcement of existing building outdoor platforms. Specific technical effects include the following:

[0030] 1. By using differentiated wall anchoring methods (angle steel for stress dispersion + through bolts + flange anchoring for masonry walls, and rebar / pull anchoring for concrete walls), the problem of traditional single anchoring methods being incompatible with multiple wall types is solved. This achieves adaptive matching of the anchoring structure with the mechanical properties of different wall materials, ensuring anchoring reliability and reducing construction complexity.

[0031] 2. By adopting a precision adjustment mechanism consisting of a fine-tuning bushing and a positive and negative thread structure, the stepless fine-tuning and self-locking function of the support length is realized, which solves the problems of insufficient precision and easy loosening of the traditional bolt hole adjustment method. It can accurately lift the platform that has deflected and deformed. In addition, by setting up a force sensor and digital display, the construction personnel can observe the support force value in real time, which effectively ensures the quality control and safety reliability of the reinforcement project.

[0032] 3. By pre-setting a gap between the horizontal members and the bottom of the platform and filling it with cement mortar, a flexible force transfer interface is created. This design ensures that the support system can bear sufficient force while avoiding stress concentration caused by rigid supports, protecting the original platform structure and improving the safety redundancy of the reinforcement system.

[0033] 4. The horizontal members and diagonal braces are connected by hinged nodes consisting of pins and ear plates, which allows the support system to make slight adaptive rotations during installation and under stress, effectively releasing secondary stress, avoiding the risk of damage to traditional rigid connection nodes, and improving the reliability of the entire reinforcement system.

[0034] 5. The reinforcement method provided by this invention has low requirements for the construction site environment, does not require large-scale machinery and equipment, and is basically a dry operation, which greatly reduces the impact on the building facade and the surrounding environment, and meets the strict requirements of green construction and urban renewal for civilized construction and reducing disturbance to residents. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0036] Figure 1 This is a schematic diagram of the application of the present invention to masonry structures in Embodiment 1. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of the application of the present invention to masonry structures in Embodiment 1. Figure 2 ;

[0038] Figure 3 This is a schematic diagram of the application of the present invention to a concrete structure in Embodiment 1. Figure 1 ;

[0039] Figure 4 This is a schematic diagram of the application of the present invention to a concrete structure in Embodiment 1. Figure 2 ;

[0040] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0041] In the picture:

[0042] 1. Original structural floor slab; 2. Outdoor platform; 3. Wall; 4. Angle steel; 5. Base steel plate; 6. Through bolt; 7. Adjustable diagonal brace structure; 701. Diagonal brace main body; 702. Lower section of diagonal brace; 703. Upper section of diagonal brace; 704. Fastening nut; 8. Horizontal member; 9. Cement mortar; 10. Ear plate; 11. Pin shaft; 12. Fine adjustment bushing. Detailed Implementation

[0043] 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.

[0044] As attached Figure 1 To be continued Figure 4 As shown:

[0045] Example 1: This invention provides an adjustable and adaptive installation method for reinforcing the steel structure of an outdoor platform. The reinforcement method is based on a triangular support system consisting of horizontal members 8, an adjustable diagonal bracing structure 7, and a wall anchoring structure. The adjustable diagonal bracing structure 7 is arranged along the support facade and forms the main load-bearing path. The horizontal members 8 are in contact with the bottom of the outdoor platform 2 and form a horizontal force transmission path at the top of the support. The wall anchoring structure includes a base steel plate 5 and through bolts 6. The horizontal members 8 form a hinged node through pins 11 and ear plates 10 and are connected to the top of the adjustable diagonal bracing structure 7.

[0046] The reinforcement method includes the following steps:

[0047] Step 1: Install the wall anchoring structure, and adopt different anchoring methods for different wall types;

[0048] If wall 3 is a masonry structure, the specific method for installing the wall anchoring structure is as follows: set angle steel 4 at the corner of wall 3, use through bolts 6 to pass through the flanges of base steel plate 5 and angle steel 4 in sequence, and tighten with nuts;

[0049] Masonry structures (such as brick walls) have acceptable compressive strength, but their bearing capacity is dispersed, and their local tensile and shear strength is weak. Directly using through bolts 6 to fasten the base steel plate 5 can easily cause individual bricks or mortar joints to be crushed by the huge concentrated load. This invention adds angle steel 4, which disperses the concentrated force of the bolts to a larger area of ​​the masonry wall through the flange of the angle steel 4, transforming the point load into a surface load, effectively avoiding local crushing of the masonry wall and ensuring the long-term effectiveness of the anchorage.

[0050] If wall 3 is a concrete structure, the specific method for installing the wall anchoring structure is as follows: use through bolts 6 to pass through the base steel plate 5, and anchor the through bolts 6 to the concrete wall 3 by means of rebar installation or tie rods.

[0051] Concrete structures have high compressive and tensile strength and integrity; therefore, no additional load-distributing components are required. This invention uses the most direct method of rebar installation or tie rods to tightly integrate the anchoring system with the concrete wall 3. This not only simplifies the construction and reduces the number of components and installation steps, but also makes full use of the high load-bearing capacity of the concrete wall 3 itself, making construction faster and cheaper.

[0052] Step 2: Assemble the support triangle system; Hinge the top of the horizontal rod 8 and the adjustable diagonal brace structure 7 with the pin 11 and the ear plate 10, and then fix the end of the horizontal rod 8 and the bottom of the adjustable diagonal brace structure 7 to the base steel plate 5 respectively.

[0053] Step 3: Adjust the support height and tighten the platform; by adjusting the length of the adjustable diagonal brace structure 7, make the horizontal bar 8 press upwards and tighten against the bottom of the outdoor platform 2, and then lock the adjustable diagonal brace structure 7.

[0054] Step 4: Fill the gaps and install the support measures; fill the gaps with cement mortar 9 and install lateral bracing to ensure the out-of-plane stability of the support system.

[0055] 1. In one embodiment of the present invention, the adjustable diagonal brace structure 7 has two sets of diagonal brace bodies 701, fastening nuts 704, and diagonal brace lower section 702 and diagonal brace upper section 703 that are sleeved together. The outer diameter of the diagonal brace upper section 703 is smaller than the inner diameter of the diagonal brace lower section 702. Multiple sets of bolt holes are correspondingly provided on the pipe walls of the diagonal brace lower section 702 and diagonal brace upper section 703. The fastening nuts 704 pass through the bolt holes and adjust and lock the length of the diagonal brace lower section 702 and diagonal brace upper section 703.

[0056] 2. In one embodiment of the present invention, the two sets of diagonal bracing bodies 701 are arranged in a V-shape within the supporting facade, forming a stable triangular force-bearing system together with the horizontal member 8 and the base steel plate 5. The V-shaped layout distributes the concentrated load to two anchoring points or a wider anchoring area, avoiding stress concentration and making the force transmitted to the original building wall 3 more gradual and uniform, reducing the adverse effects on the original wall 3 and enhancing the safety of the reinforcement scheme.

[0057] 3. In one embodiment of the present invention, after adjusting the support height in step three, a gap of ≥20mm is maintained between the horizontal member 8 and the bottom of the outdoor platform 2, which is filled with cement mortar 9 in step four. Cement mortar 9, as a quasi-brittle material, possesses a certain degree of deformation capacity at the microscopic level and can act as a stress buffer layer. When loads are transferred, this interface can achieve a smooth transition of force, effectively absorbing and redistributing local peak stresses, fundamentally avoiding the risk of concrete crushing or masonry collapse at the bottom of the platform due to point or line contact.

[0058] Working principle: The core working principle of the reinforcement method provided in Example 1 is as follows: Through a height-adjustable triangular support system that can be installed after being assembled on the ground, an additional and reliable elastic support point is provided for the outdoor platform 2 that has deflected or needs to be reinforced, thereby optimizing the stress path of the original structure and distributing and transferring the platform load to the load-bearing wall 3 below.

[0059] The specific work process is as follows:

[0060] Load transfer: The vertical load borne by the outdoor platform 2 is transferred to its root through the platform plate, and at the same time, it also acts on the cement mortar 9 filling layer on the horizontal member 8.

[0061] Triangular decomposition: The load borne by the horizontal member 8 is decomposed through the connection nodes at both ends: one end transmits the force to the base steel plate 5 and the wall 3 through the welded node; the other end transmits the force to the two sets of adjustable diagonal bracing structures 7 through the hinge node of the pin 11.

[0062] Force conversion: The diagonal bracing structure converts the received vertical component force into axial pressure and efficiently transmits it to the wall anchoring structure along the V-shaped arrangement path; in this process, the adjustable diagonal bracing structure 7, as the core bearing component, ensures the geometric stability of the support system by locking its length.

[0063] Anchoring balance: Ultimately, all loads are safely and dispersedly transferred to the main load-bearing structure of the building through the wall anchoring structure, forming a complete and closed force flow path from the platform to the horizontal bar to the diagonal brace to the wall 3, thereby achieving effective support and reinforcement for the outdoor platform 2.

[0064] As attached Figure 5 As shown:

[0065] Example 2: This example is basically the same as the previous example, except that the top of the lower section 702 of the diagonal brace and the bottom of the upper section 703 of the diagonal brace are respectively provided with internal threads and external threads. The adjustable diagonal brace structure 7 also has a fine-tuning bushing 12. The outer side of the fine-tuning bushing 12 is a positive thread and mates with the internal thread at the top of the lower section 702 of the diagonal brace. The inner side of the fine-tuning bushing 12 is a negative thread and mates with the external thread at the bottom of the upper section 703 of the diagonal brace. The outer surface of the middle part of the fine-tuning bushing 12 is machined with knurling or a wrench hole (not shown in the figure) to facilitate tool rotation. The contact end face between the fine-tuning bushing 12 and the lower section 702 of the diagonal brace integrates a ring-shaped piezoelectric sensor film and a digital display powered by a micro battery (not shown in the figure).

[0066] The reinforcement method includes the following steps:

[0067] Step 1: Install the wall anchoring structure, and adopt different anchoring methods for different wall types;

[0068] Step 2: Assemble the support triangle system; Hinge the top of the horizontal rod 8 and the adjustable diagonal brace structure 7 with the pin 11 and the ear plate 10, and then fix the end of the horizontal rod 8 and the bottom of the adjustable diagonal brace structure 7 to the base steel plate 5 respectively.

[0069] Step 3: Rotate the fine-tuning bushing 12 with a special wrench. Since the inner and outer threads of the fine-tuning bushing 12 rotate in opposite directions, its rotation will drive the upper section 703 of the diagonal brace to produce a precise linear extension and retraction motion relative to the lower section 702 of the diagonal brace, thereby achieving stepless precision fine-tuning of the support length. During this process, the operator needs to observe the support force value displayed on the digital display in real time and continuously rotate the fine-tuning bushing 12 until the support force reaches the preset target value. At this time, the support system is in the optimal working state, and the threaded transmission mechanism achieves reliable locking due to its self-locking characteristics.

[0070] Step 4: Fill the gaps and install the support measures; fill the gaps with cement mortar 9 and install lateral bracing to ensure the out-of-plane stability of the support system.

[0071] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for reinforcing an adjustable, self-adaptive outdoor platform steel structure, the method being based on a triangular support system consisting of horizontal members (8), an adjustable diagonal bracing structure (7), and a wall anchoring structure, wherein the adjustable diagonal bracing structure (7) is arranged along the support facade and forms the main load-bearing path, the horizontal members (8) contact the bottom of the outdoor platform (2) and form a horizontal load transmission path at the top of the support; the wall anchoring structure includes a base steel plate (5) and through bolts (6), the horizontal members (8) form a hinged node through pins (11) and ear plates (10) and are connected to the top of the adjustable diagonal bracing structure (7), characterized in that: The reinforcement method includes the following steps: Step 1: Install the wall anchoring structure; Step 2: Assemble the support triangle system; Hinge the top of the horizontal rod (8) and the adjustable diagonal brace structure (7) with a pin (11) and an ear plate (10), and then fix the end of the horizontal rod (8) and the bottom of the adjustable diagonal brace structure (7) to the base steel plate (5). Step 3: Adjust the support height and tighten the platform; by adjusting the length of the adjustable diagonal brace structure (7), make the horizontal bar (8) tighten upwards to the bottom of the outdoor platform (2), and then lock the adjustable diagonal brace structure (7). Step 4: Fill the gaps and install the safeguards; fill the gaps with cement mortar (9) and install lateral bracing to ensure the out-of-plane stability of the support system.

2. The adjustable adaptive installation method for reinforcing outdoor platform steel structures according to claim 1, characterized in that: In step one, different anchoring methods are adopted for different wall types (3): If the wall (3) is a masonry structure, the specific method for installing the wall anchoring structure is as follows: set angle steel (4) at the corner of the wall (3), use through bolts (6) to pass through the flanges of the base steel plate (5) and angle steel (4) in sequence, and tighten them with nuts; If the wall (3) is a concrete structure, the specific method for installing the wall anchoring structure is as follows: use through bolts (6) to pass through the base steel plate (5), and anchor the through bolts (6) to the concrete wall (3) by means of rebar or tie rod.

3. The method for reinforcing an adjustable, self-adaptive outdoor platform steel structure according to claim 1, characterized in that: The adjustable diagonal brace structure (7) has two sets of diagonal brace bodies (701), fastening nuts (704), and a lower diagonal brace section (702) and an upper diagonal brace section (703) that are connected to each other. The outer diameter of the upper diagonal brace section (703) is smaller than the inner diameter of the lower diagonal brace section (702). Multiple sets of bolt holes are provided on the pipe walls of the lower diagonal brace section (702) and the upper diagonal brace section (703). The fastening nuts (704) pass through the bolt holes and adjust and lock the length of the lower diagonal brace section (702) and the upper diagonal brace section (703).

4. The adjustable adaptive installation method for reinforcing outdoor platform steel structures according to claim 3, characterized in that: The two sets of diagonal bracing bodies (701) are arranged in a V-shape within the support facade, forming a stable triangular force system together with the horizontal members (8) and the base steel plate (5).

5. The adjustable adaptive installation method for reinforcing outdoor platform steel structures according to claim 1, characterized in that: In step three, after adjusting the support height, a gap of ≥20mm is maintained between the horizontal bar (8) and the bottom of the outdoor platform (2), which is filled with cement mortar (9) in step four.

6. The adjustable adaptive installation method for reinforcing outdoor platform steel structures according to claim 3, characterized in that: The top of the lower section (702) of the diagonal brace and the bottom of the upper section (703) of the diagonal brace are respectively provided with internal threads and external threads. The adjustable diagonal brace structure (7) also has a fine-tuning bushing (12). The outer side of the fine-tuning bushing (12) is a positive thread and it is engaged with the internal thread provided at the top of the lower section (702) of the diagonal brace. The inner side of the fine-tuning bushing (12) is a negative thread and it is engaged with the external thread at the bottom of the upper section (703) of the diagonal brace.

7. The method for reinforcing an adjustable, self-adaptive outdoor platform steel structure according to claim 6, characterized in that: The outer surface of the middle part of the fine-tuning bushing (12) is machined with knurling or wrench holes to facilitate tool rotation. The contact end face of the fine-tuning bushing (12) and the lower section (702) of the diagonal brace integrates an annular piezoelectric sensor film and a digital display powered by a micro battery.

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