Flower basket type cantilever scaffold adopting novel rigid pull rod structure and construction method

Abstract

The invention discloses a flower basket type overhanging scaffold adopting a novel rigid pull rod structure and a construction method, and relates to the technical field of overhanging scaffolds.The flower basket type overhanging scaffold specifically comprises a straight short-limb steel cantilever beam, an inclined short-limb steel cantilever beam and an external-corner short-limb steel cantilever beam so that the short-limb steel cantilever beams can be matched with different building wall faces, and the ends of the short-limb steel cantilever beams are connected with an embedded fixing system through end plates with horizontal slotted holes; the novel rigid pull rod assembly is composed of an upper pull rod, a lower pull rod, a middle flower basket screw and a double-lifting-lug plate, inclined supporting can be formed to achieve unloading, the positioning piles are used for calibrating the positions of the vertical rods, the horizontal cross beams can complement supporting gaps of the vertical rods, and the frame body supporting structure comprises the vertical rods, longitudinal and transverse horizontal rods, wall connecting pieces and diagonal bridging. A stable operation frame body can be built and matched with a protection facility, the construction method follows the processes of pre-embedded fixing system installation, short-limb steel cantilever beam installation, positioning pile and horizontal cross beam installation, novel rigid pull rod assembly installation, frame body supporting structure erection, frame body protection and closing and dismantling operation, and dismantling needs to be conducted according to the sequence opposite to that of installation.

Description

Technical Field

[0001] This invention relates to the field of cantilever scaffolding technology, specifically to a basket-type cantilever scaffolding with a novel rigid tie rod structure and its construction method. Background Technology

[0002] In the construction of exterior walls of mid- to high-rise buildings, cantilevered scaffolding needs to be precisely coordinated with the building structure. The positional relationship of each structure directly affects the overall stability and safety. The conventional method is to erect scaffolding, but the erection process is quite complicated.

[0003] Therefore, basket screws are used to form basket-type cantilever scaffolding. However, traditional basket-type cantilever scaffolding often has the problem of low structural position matching, such as misalignment between short steel cantilever beams and embedded components, unreasonable connection positions between tie rods and cantilever beams and building structures, and mismatch between the support points of the scaffold uprights and cantilever beams. This leads to difficulties in scaffolding assembly and disassembly, poor stability, and increased construction risks.

[0004] Therefore, it is necessary to optimize the positional relationship of each structure of the scaffolding to ensure that all components work together and improve construction safety and efficiency. This invention proposes a solution for this purpose. Summary of the Invention

[0005] The purpose of this invention is to provide a basket-type cantilever scaffold with a novel rigid tie rod structure and a construction method. The key objective is to optimize the connection method of each component in the conventional basket-type cantilever scaffolding construction process, ensuring that each component works together and improving construction safety and efficiency.

[0006] The objective of this invention can be achieved through the following technical solution: a basket-type cantilever scaffold with a novel rigid tie rod structure, comprising a short steel cantilever beam, a novel rigid tie rod assembly, a pre-embedded fixing system, positioning piles, a horizontal beam, and a frame support structure; the end of the short steel cantilever beam is connected to the pre-embedded fixing system through an end plate, and the end plate is provided with a horizontal slot to meet the position adjustment requirements of the pre-embedded fixing system; The novel rigid tie rod assembly includes an upper tie rod, a lower tie rod, a middle turnbuckle, and a double-hanging lug plate connector. The double-hanging lug plate is fixed on the short-limb steel cantilever beam. The upper tie rod and the lower tie rod are connected by the middle turnbuckle. One end of the upper tie rod is connected to a preset position on the building structure, and one end of the lower tie rod is connected to the double-hanging lug plate. The pre-embedded fixing system is embedded in the beams or shear walls of the building structure and corresponds to the installation position at the end of the short limb steel cantilever beam. The positioning pile is fixed on the top of the short limb steel cantilever beam and corresponds to the installation position of the upright in the frame support structure. The horizontal beam is erected above the short steel cantilever beam, and its position matches the area of ​​the short steel cantilever beam between the bottom of the upright. The frame support structure includes uprights, longitudinal and transverse horizontal bars, wall ties, and scissor braces. The uprights are erected on positioning piles or horizontal beams. The longitudinal and transverse horizontal bars connect the uprights to form the frame. One end of the wall tie is connected to the frame, and the other end is fixed to the building structure. The scissor braces are set along the outer facade of the frame and connected to the frame.

[0007] Further configuration: The short-limb steel cantilever beam includes a straight beam, an inclined beam, and a corner beam, corresponding to the installation positions of the straight wall surface, inclined wall surface, and corner part of the building, respectively. The end plate is fixedly connected to the end of the short-limb steel cantilever beam, and the direction of its horizontal slot is consistent with the horizontal adjustment direction of the fasteners in the pre-embedded fixing system.

[0008] The configuration is further defined as follows: the double-ear plate is vertically fixed to the upper surface of the short-limb steel cantilever beam and is located on the side of the short-limb steel cantilever beam away from the building structure; the connection position of the upper tie rod with the building structure is located on the building beam or shear wall above the short-limb steel cantilever beam and forms an oblique support structure.

[0009] Further configuration: The pre-embedded fixing system includes a pre-embedded pipe and matching fasteners. The pre-embedded pipe is embedded in the building beam or shear wall, and its axial direction is perpendicular to the force direction of the short limb steel cantilever beam. The fasteners pass through the pre-embedded pipe and are connected to the end plate at the end of the short limb steel cantilever beam. The pre-embedded fixing system at the external corner is adapted to the installation angle and position of the external corner type short limb steel cantilever beam.

[0010] The configuration is further defined as follows: the positioning piles are arranged at intervals along the length direction of the short limb steel cantilever beams, and the axes of the positioning piles are all in the same vertical plane; the length direction of the horizontal beam is perpendicular to the length direction of the short limb steel cantilever beams, and its two ends are respectively erected on the adjacent short limb steel cantilever beams.

[0011] Further configuration: among the longitudinal and transverse horizontal bars, the longitudinal horizontal bars are arranged along the length of the frame, the transverse horizontal bars are perpendicular to the longitudinal horizontal bars and located at the main nodes of the frame, the wall ties are arranged at intervals along the height and length of the frame, and their connection positions with the building structure are preferably selected from building frame columns or frame beams, and the scissor braces obliquely connect the frame uprights and horizontal bars to form a continuous triangular support structure.

[0012] This invention also proposes a construction method for a basket-type cantilever scaffold using a novel rigid tie rod structure, including the following: (1) Installation of the pre-embedded fixing system: According to the design installation position of the short limb steel cantilever beam, before the building beam or shear wall is poured, the pre-embedded pipe of the pre-embedded fixing system is fixed in the steel reinforcement cage to ensure that the position of the pre-embedded pipe corresponds to the installation position of the end plate at the end of the short limb steel cantilever beam. (2) Installation of short steel cantilever beams: After the concrete of the building beam or shear wall reaches the design strength, connect the end plate of the short steel cantilever beam to the fastener of the pre-embedded fixing system, and adjust the horizontal and vertical position of the short steel cantilever beam so that the cantilever end of the short steel cantilever beam meets the building requirements. (3) Installation of positioning piles and horizontal beams: Fix positioning piles at the top of the short steel cantilever beams, corresponding to the design position of the uprights; for areas where the bottom of the uprights cannot directly correspond to the short steel cantilever beams, erect horizontal beams on the adjacent short steel cantilever beams and fix them. (4) Installation of the new rigid tie rod assembly: Fix the double hanging lug plate on the short limb steel cantilever beam, connect one end of the lower tie rod to the double hanging lug plate, and connect the other end to the upper tie rod through the middle turnbuckle. Then fix the other end of the upper tie rod to the preset position of the building structure above the short limb steel cantilever beam, and adjust the middle turnbuckle to make the tie rod in a tensioned state. (5) Erection of the frame support structure: Erect the uprights on the positioning piles or horizontal beams, and erect the longitudinal and transverse horizontal bars in sequence to form the frame; install the wall ties at the design intervals to connect and fix the frame to the building structure; erect scissor bracing along the outer facade of the frame to form an overall support. (6) Scaffold protection and enclosure: Scaffold boards are laid on the working layer of the scaffold, and railings and toe boards are installed along the outside of the scaffold; the gap between the scaffold and the building structure is sealed, and horizontal safety nets are installed as required; (7) Demolition work: In the order of top to bottom and first erection and then demolition, the protective facilities and frame support structure are dismantled in sequence, and finally the new rigid tie rod assembly and short steel cantilever beam are dismantled. During the demolition process, ensure that the demolition sequence of each structure is the opposite of the installation sequence to avoid damage to the building structure.

[0013] The present invention has the following beneficial effects: 1. Short steel cantilever beams are available in three specifications: straight, inclined, and external corner. These can be matched to the installation requirements of straight walls, inclined walls, and external corners of buildings, achieving full coverage adaptation for different building facade scenarios. The horizontal slots on the end plates can fine-tune the horizontal position of the short steel cantilever beams, effectively compensating for installation deviations of the pre-embedded fixing system and ensuring that the cantilever end of the beam precisely matches the design position. Horizontal beams can be erected on adjacent short steel cantilever beams to provide stable support for uprights that cannot directly correspond to the short steel cantilever beams, avoiding uneven local stress on the frame caused by factors such as building structure protrusions, and ensuring the comprehensiveness and reliability of the upright support.

[0014] 2. The new rigid tie rod assembly forms an oblique support from the building structure to the short-limb steel cantilever beam. The direction of the tension is opposite to the direction of the cantilever beam's cantilever force, which can effectively offset part of the bending moment of the cantilever beam, greatly improving the load-bearing capacity of the short-limb steel cantilever beam. Moreover, by adjusting the intermediate turnbuckle, the tie rod can be kept taut, avoiding tie rod slack failure and ensuring stable unloading effect. In the frame support structure, the horizontal bars are set at the main nodes, and the wall ties reliably connect the frame to the building frame columns or frame beams. The scissor braces form a continuous triangular support. The synergistic effect of multiple structures enhances the overall rigidity and anti-overturning ability of the frame, and eliminates safety hazards such as lateral displacement of the frame. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Fig. 1 This is a schematic diagram of the straight beam in the basket-type cantilever scaffold with a novel rigid tie rod structure proposed in this invention; Fig. 2 This is a schematic diagram of the inclined beam in the basket-type cantilever scaffold with a novel rigid tie rod structure proposed in this invention; Fig. 3 This is a schematic diagram of the external corner beam in the basket-type cantilever scaffold with a novel rigid tie rod structure proposed in this invention; Fig. 4 This is a schematic diagram of the basket screw in the basket-type cantilever scaffold with a novel rigid tie rod structure proposed in this invention; Fig. 5 This is a schematic diagram showing the position of the wall tie in the basket-type cantilever scaffold with a novel rigid tie rod structure proposed in this invention; Fig. 6 This is a diagram showing the installation positions of the steel beam cantilever and the turnbuckle in the basket-type cantilever scaffolding with a novel rigid tie rod structure proposed in this invention. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: Refer to Figs. 1~6The basket-type cantilever scaffold with a novel rigid tie rod structure in this embodiment includes a short steel cantilever beam, a novel rigid tie rod assembly, a pre-embedded fixing system, positioning piles, a horizontal beam, and a frame support structure; the end of the short steel cantilever beam is connected to the pre-embedded fixing system through an end plate, and the end plate is provided with a horizontal slot to meet the position adjustment requirements of the pre-embedded fixing system; The new rigid tie rod assembly includes an upper tie rod, a lower tie rod, a middle turnbuckle, and a double-hanging lug plate connector. The double-hanging lug plate is fixed to the short-limb steel cantilever beam. The upper tie rod and the lower tie rod are connected by the middle turnbuckle. One end of the upper tie rod is connected to a preset position in the building structure, and one end of the lower tie rod is connected to the double-hanging lug plate. The pre-embedded fixing system is embedded in the beams or shear walls of the building structure and corresponds to the installation position at the end of the short steel cantilever beam. The positioning pile is fixed on the top of the short steel cantilever beam and corresponds to the installation position of the upright in the frame support structure. The horizontal beam is erected above the short steel cantilever beam, and its position matches the area of ​​the short steel cantilever beam between the bottom of the upright. The frame support structure includes uprights, longitudinal and transverse horizontal bars, wall ties and scissor braces. The uprights are erected on positioning piles or horizontal beams. The longitudinal and transverse horizontal bars connect the uprights to form the frame. One end of the wall tie is connected to the frame and the other end is fixed to the building structure. The scissor braces are set along the outer facade of the frame and connected to the frame.

[0019] Basic structural description: The present invention Figs. 1~3 This is mainly used to represent the specific structural shape of the short-limb steel cantilever beam. It shows that the connection method using turnbuckles has been optimized. While the various components in the overall structure are still conventional steel members, the collaborative relationships between these components are explained in conjunction with the entire text. S1: Short-limb steel cantilever beam and pre-embedded fixing system The short-limb steel cantilever beam is the main cantilever load-bearing structure of the scaffold. One end of it is connected to the pre-embedded fixing system through an end plate, and the other end cantilevered to the outside of the building. The pre-embedded fixing system is embedded in the beams or shear walls of the building, and its position corresponds exactly to the installation position of the end of the short-limb steel cantilever beam. This ensures that the short-limb steel cantilever beam can stably bear the load of the scaffold after it is connected to the pre-embedded fixing system through fasteners. The horizontal slots on the end plate allow for fine-tuning of the horizontal position of the short steel cantilever beam, compensating for installation deviations in the pre-embedded fixing system and ensuring that the position of the cantilever end of the short steel cantilever beam meets design requirements. Based on the shape of the building wall, the short steel cantilever beam is divided into straight beams, inclined beams, and external corner beams, corresponding to straight walls, inclined walls, and external corners, respectively. The end angle of the external corner beam is adapted to the angle of the building's external corner, and the position of the end plate is also adjusted with the beam angle to ensure precise connection with the pre-embedded fixing system at the external corner. S2: New rigid tie rod assembly with short-limb steel cantilever beams and building structures The new rigid tie rod assembly is an important unloading structure for short-limb steel cantilever beams. Its core component, the double lug plate, is vertically fixed to the upper surface of the short-limb steel cantilever beam and is located on the cantilever side of the short-limb steel cantilever beam away from the building structure, so that the connection point between the lower tie rod and the short-limb steel cantilever beam is in the reasonable stress area of ​​the cantilever beam. One end of the lower tie rod is hinged to the double lug plate, and the other end is connected to the upper tie rod through the middle turnbuckle. The end of the upper tie rod away from the turnbuckle is fixed to the building beam or shear wall above the short steel cantilever beam, forming an oblique support from the building structure to the short steel cantilever beam. This positional arrangement makes the tension direction of the tie rod opposite to the cantilever force direction of the short steel cantilever beam, which can effectively offset part of the bending moment of the cantilever beam and improve the load-bearing capacity of the cantilever beam. At the same time, the connection position of the upper tie rod to the building structure must be higher than the installation position of the short steel cantilever beam to ensure that the tie rod is in an oblique tension state and avoid tie rod slack failure. S3: Positioning stakes, horizontal beams and short steel cantilever beams, uprights Positioning stakes are used to determine the installation position of the uprights. They are vertically fixed to the top of the short steel cantilever beam and are evenly distributed along the length of the short steel cantilever beam according to the upright spacing. The axes of all positioning stakes are in the same vertical plane to ensure that the uprights are vertical and neatly arranged after installation. When the bottom of the upright cannot directly correspond to the short steel cantilever beam due to the building structure protrusion or other reasons, a horizontal beam needs to be set up. The length direction of the horizontal beam is perpendicular to the length direction of the short steel cantilever beam. Its two ends are placed on the adjacent short steel cantilever beam and fixed to form a support platform that spans the gap. The upright stands on the horizontal beam to ensure that the upright always has reliable support and avoid uneven local stress on the frame. S4: Frame support structure and short-limb steel cantilever beams, building structure The frame support structure consists of uprights, longitudinal and transverse horizontal bars, wall ties, and scissor braces, forming a complete working frame. The uprights stand vertically on positioning stakes or horizontal beams and are the main vertical load-bearing components of the frame. The longitudinal horizontal bars connect adjacent uprights along the length of the frame, and the transverse horizontal bars are perpendicular to the longitudinal horizontal bars and must be located at the main nodes of the frame (the intersection of the uprights and the longitudinal horizontal bars). They are fastened to the uprights and longitudinal horizontal bars with right-angle couplers to form stable rectangular frame units. Wall ties are used to connect the scaffold to the building structure to prevent lateral displacement of the scaffold. One end of the wall tie is connected to the upright or horizontal bar of the scaffold via a fastener, and the other end is fixed to the frame column or frame beam of the building. They are arranged at regular intervals along the height and length of the scaffold to ensure that each wall tie can effectively transfer the lateral force of the scaffold to the building structure. Scissor braces are continuously set along the outer facade of the scaffold, diagonally connecting the uprights and horizontal bars of different heights to form a triangular support structure. Their arrangement direction must be perpendicular to the direction of possible deformation of the scaffold to further enhance the overall rigidity and anti-overturning ability of the scaffold. S5: Location and layout of the protective structure The scaffolding protective structure includes scaffold boards, railings, toe boards, and horizontal safety nets. Scaffold boards are fully laid on the longitudinal and transverse horizontal bars of the working level, covering the entire working area to ensure that construction workers have a safe working surface. Railings and toe boards are set on the outside of the scaffolding and at the edge of the working level. The railings are divided into upper railings and middle railings, both of which are continuously arranged along the length of the scaffolding. The toe boards are close to the inside of the scaffolding uprights to prevent people from falling or materials from rolling down. Horizontal safety nets are set in the gap between the scaffolding and the building structure and under the scaffolding. The horizontal safety net under the scaffolding must cover the overhanging area of ​​the scaffolding and maintain a certain distance from the edge of the building structure to form a protective barrier below and avoid falls from height.

[0020] Example 2: Supplementing the overall construction process by combining S1~S5 from Example 1: S1-1: During the reinforcement binding stage of building beams or shear walls, determine the position of the embedded pipe in the pre-embedded fixing system according to the design installation position of the short limb steel cantilever beam. The embedded pipe must be fixedly connected to the reinforcement cage to ensure that its axial direction is perpendicular to the force direction of the short limb steel cantilever beam, and the center position of the embedded pipe corresponds to the slot position of the end plate of the short limb steel cantilever beam. Before pouring concrete, the position of the embedded pipe must be checked to avoid the embedded pipe deviating from the design position due to the displacement of the reinforcement, so as to ensure that the short limb steel cantilever beam can be installed smoothly in the future. S2-1: After the concrete of the building beam or shear wall reaches the design strength, remove the formwork and clean up the debris around the embedded pipe. Attach the end plate of the short steel cantilever beam to the building wall, aligning the horizontal slot of the end plate with the embedded pipe. Insert fasteners and initially fix it. Adjust the levelness and cantilever length of the short steel cantilever beam using a level and measuring tape to ensure that the position of the cantilever end of the beam meets the design requirements. After adjustment, tighten the fasteners to reliably connect the short steel cantilever beam to the embedded fixing system. S3-1: According to the design spacing of the uprights, mark the installation position of the positioning piles on the top of the short steel cantilever beams, and weld the positioning piles vertically to the short steel cantilever beams to ensure that the axis of the positioning piles is vertical and the position is accurate. For areas where the bottom of the uprights cannot directly correspond to the short steel cantilever beams, measure the spacing between adjacent short steel cantilever beams, cut a horizontal beam of appropriate length, and place the horizontal beam on the adjacent short steel cantilever beams. Fix it by spot welding or U-shaped rings to ensure that the surface of the horizontal beam is flat and that it is firmly connected to the short steel cantilever beams. S4-1: Mark the installation position of the double-hanging lug plate on the short-limb steel cantilever beam. Vertically weld the double-hanging lug plate to the upper surface of the short-limb steel cantilever beam. Connect one end of the lower tie rod to the double-hanging lug plate through a pin, and thread the other end to one end of the middle turnbuckle. Thread one end of the upper tie rod to the other end of the middle turnbuckle, and fix the other end to the pre-set position of the building beam or shear wall above the short-limb steel cantilever beam. Rotate the middle turnbuckle to adjust the tie rod length so that both the upper and lower tie rods are in a taut state, ensuring that the tie rods form a stable diagonal support. At this time, it is necessary to check whether the connection position of the tie rods with the short-limb steel cantilever beam and the building structure is correct to avoid bending or loosening of the tie rods. S4-2: Insert the bottom of the upright into the positioning pile or place it on the horizontal beam. After adjusting the upright to be vertical, connect the upright to the longitudinal horizontal bar with right-angle couplers. The longitudinal horizontal bar is erected according to the design step distance, and both ends are firmly connected to the upright. At each main node, erect a transverse horizontal bar and fasten it to the upright and longitudinal horizontal bar. Install wall ties according to the design spacing, ensuring that one end of the wall tie is tightly connected to the frame and the other end is reliably fixed to the building structure. Erect scissor bracing along the outer facade of the frame. The two ends of the scissor bracing are connected to the upright or horizontal bar, and connection points are added at certain intervals in the middle to form a continuous triangular support.

[0021] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A basket-type cantilever scaffolding with a novel rigid tie rod structure, characterized in that: It includes a short-limb steel cantilever beam, a new type of rigid tie rod assembly, a pre-embedded fixing system, positioning piles, a horizontal beam, and a frame support structure; the end of the short-limb steel cantilever beam is connected to the pre-embedded fixing system through an end plate, and the end plate is provided with a horizontal slot to meet the position adjustment requirements of the pre-embedded fixing system. The novel rigid tie rod assembly includes an upper tie rod, a lower tie rod, a middle turnbuckle, and a double-hanging lug plate connector. The double-hanging lug plate is fixed on the short-limb steel cantilever beam. The upper tie rod and the lower tie rod are connected by the middle turnbuckle. One end of the upper tie rod is connected to a preset position on the building structure, and one end of the lower tie rod is connected to the double-hanging lug plate. The pre-embedded fixing system is embedded in the beams or shear walls of the building structure and corresponds to the installation position at the end of the short limb steel cantilever beam. The positioning pile is fixed on the top of the short limb steel cantilever beam and corresponds to the installation position of the upright in the frame support structure. The horizontal beam is erected above the short steel cantilever beam, and its position matches the area of ​​the short steel cantilever beam between the bottom of the upright. The frame support structure includes uprights, longitudinal and transverse horizontal bars, wall ties, and scissor braces. The uprights are erected on positioning piles or horizontal beams. The longitudinal and transverse horizontal bars connect the uprights to form the frame. One end of the wall tie is connected to the frame, and the other end is fixed to the building structure. The scissor braces are set along the outer facade of the frame and connected to the frame.

2. The basket-type cantilever scaffolding with a novel rigid tie rod structure according to claim 1, characterized in that, The short-limb steel cantilever beam includes straight beams, inclined beams, and external corner beams, which correspond to the installation positions of straight walls, inclined walls, and external corners of the building, respectively. The end plate is fixedly connected to the end of the short-limb steel cantilever beam, and the direction of its horizontal slot is consistent with the horizontal adjustment direction of the fasteners in the pre-embedded fixing system.

3. The basket-type cantilever scaffolding with a novel rigid tie rod structure according to claim 2, characterized in that, The double-ear plate is vertically fixed to the upper surface of the short-limb steel cantilever beam and is located on the side of the short-limb steel cantilever beam away from the building structure. The connection position of the upper tie rod to the building structure is located on the building beam or shear wall above the short-limb steel cantilever beam and forms an oblique support structure.

4. The basket-type cantilever scaffolding with a novel rigid tie rod structure according to claim 3, characterized in that, The pre-embedded fixing system includes a pre-embedded pipe and matching fasteners. The pre-embedded pipe is embedded in the building beam or shear wall, and its axial direction is perpendicular to the force direction of the short limb steel cantilever beam. The fasteners pass through the pre-embedded pipe and are connected to the end plate at the end of the short limb steel cantilever beam. The pre-embedded fixing system at the external corner is adapted to the installation angle and position of the external corner short limb steel cantilever beam.

5. The basket-type cantilever scaffolding with a novel rigid tie rod structure according to claim 4, characterized in that, The positioning piles are arranged at intervals along the length of the short steel cantilever beams, and the axes of the positioning piles are all in the same vertical plane. The length of the horizontal beam is perpendicular to the length of the short steel cantilever beams, and its two ends are respectively erected on the adjacent short steel cantilever beams.

6. The basket-type cantilever scaffolding with a novel rigid tie rod structure according to claim 5, characterized in that, Among the longitudinal and transverse horizontal bars, the longitudinal horizontal bars are set along the length of the frame, and the transverse horizontal bars are perpendicular to the longitudinal horizontal bars and located at the main nodes of the frame. The wall ties are arranged at intervals along the height and length of the frame, and their connection positions with the building structure are preferably selected from building frame columns or frame beams. The scissor braces diagonally connect the uprights and horizontal bars of the frame and form a continuous triangular support structure.

7. A construction method for a basket-type cantilever scaffold with a novel rigid tie rod structure, using the basket-type cantilever scaffold with a novel rigid tie rod structure as described in claim 6, characterized in that... Includes the following: (1) Installation of the pre-embedded fixing system: According to the design installation position of the short limb steel cantilever beam, before the building beam or shear wall is poured, the pre-embedded pipe of the pre-embedded fixing system is fixed in the steel reinforcement cage to ensure that the position of the pre-embedded pipe corresponds to the installation position of the end plate at the end of the short limb steel cantilever beam. (2) Installation of short steel cantilever beams: After the concrete of the building beam or shear wall reaches the design strength, connect the end plate of the short steel cantilever beam to the fastener of the pre-embedded fixing system, and adjust the horizontal and vertical position of the short steel cantilever beam so that the cantilever end of the short steel cantilever beam meets the building requirements. (3) Installation of positioning piles and horizontal beams: Fix positioning piles at the top of the short steel cantilever beams, corresponding to the design position of the uprights; for areas where the bottom of the uprights cannot directly correspond to the short steel cantilever beams, erect horizontal beams on the adjacent short steel cantilever beams and fix them. (4) Installation of the new rigid tie rod assembly: Fix the double hanging lug plate on the short limb steel cantilever beam, connect one end of the lower tie rod to the double hanging lug plate, and connect the other end to the upper tie rod through the middle turnbuckle. Then fix the other end of the upper tie rod to the preset position of the building structure above the short limb steel cantilever beam, and adjust the middle turnbuckle to make the tie rod in a tensioned state. (5) Erection of the frame support structure: Erect the uprights on the positioning piles or horizontal beams, and erect the longitudinal and transverse horizontal bars in sequence to form the frame; install the wall ties at the design intervals to connect and fix the frame to the building structure; erect scissor bracing along the outer facade of the frame to form an overall support. (6) Scaffold protection and enclosure: Scaffold boards are laid on the working layer of the scaffold, and railings and toe boards are installed along the outside of the scaffold; the gap between the scaffold and the building structure is sealed, and horizontal safety nets are installed as required; (7) Demolition work: In the order of top to bottom and first erection and then demolition, the protective facilities and frame support structure are dismantled in sequence, and finally the new rigid tie rod assembly and short steel cantilever beam are dismantled. During the demolition process, ensure that the demolition sequence of each structure is the opposite of the installation sequence to avoid damage to the building structure.

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