A reinforcement structure for the connection between pile foundation and raft slab

Abstract

This application discloses a reinforcement structure for the connection between pile foundations and raft slabs, belonging to the field of building engineering technology. It includes a reinforcement frame and reinforcing bar arms. This application constructs an integrated operation process of "folding and storing – convenient insertion – unfolding support – locking and fixing" through the coordinated action of anchors and positioning components. This not only solves the industry pain point of difficult installation in confined spaces but also effectively protects the original steel reinforcement structure, reduces structural hazards caused by improper installation, and lays a solid foundation for the reliability of subsequent reinforcement.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and more specifically, to a reinforcement structure for the connection between pile foundations and raft foundations. Background Technology

[0002] In the field of building construction, the structural integrity of the connection between pile foundations and raft foundations is crucial, as it directly affects the overall stability and safety of the superstructure. Traditionally, prefabricated steel cages are commonly used for foundation construction. However, significant technical challenges arise when reinforcing the pre-fabricated steel cages, particularly at critical nodes connecting the pile foundation and raft foundation.

[0003] First, the internal space of precast steel cages is usually small and the structure is complex, which greatly limits the operating space. Conventional reinforcement components are often large in size or have a rigid fixed structure, making it difficult to flexibly install and adjust them within the limited space after the steel cage is woven. Construction workers find it difficult to accurately deliver and fix the reinforcement components to the target position, resulting in low reinforcement work efficiency. In fact, forced installation may even disturb the original steel structure and affect its load-bearing performance.

[0004] Secondly, the steel reinforcement structures at the connection between pile foundations and raft slabs have diverse specifications and complex stresses. Most existing reinforcement structures are of fixed dimensions or angles, lacking effective adjustment mechanisms and making it difficult to adapt to pile foundation main bars and stirrups of different diameters and spacings. This mismatch not only reduces the fit and effectiveness of the reinforcement but may also create new weak points due to stress concentration, failing to fundamentally solve the defects of insufficient structural strength and stiffness at the connection.

[0005] Furthermore, for effective reinforcement, the reinforcement structure itself needs to possess sufficient load-bearing and force-transfer capabilities. In existing reinforcement technologies, the connection between the supporting components (such as anchors) and the main structure is often quite simple, either through welding (unsuitable for post-reinforcement scenarios) or simple hinges, lacking a reliable mechanism for switching and locking between a folded (easy to insert) and unfolded (stable support) working state. This can lead to the reinforcement structure accidentally folding during installation, and potentially losing its load-bearing capacity in the working state due to insecure locking.

[0006] Furthermore, when reinforcing structures act on reinforcing bars, it is necessary to ensure a tight and reliable bond between the reinforcing structure and the surface of the reinforcing bars. In existing methods, the components used to restrain and fix the reinforcing bars (such as hoops, clips, etc.) are usually fixed in position or have a limited range of adjustment, making it impossible to fine-tune them according to the actual position of the reinforcing bars on site after installation. This results in some reinforcing bars not being effectively restrained, uneven reinforcement effect, and local reinforcement defects.

[0007] In summary, existing technologies for post-reinforcement of the steel cage at the connection between pile foundations and raft foundations mainly suffer from problems such as installation difficulties due to limited operating space, poor self-adjustment capability of the reinforced structure, insufficient reliability of the support connection, and the inability to adjust the position of the steel reinforcement restraint components. These problems restrict the quality and efficiency of reinforcement construction, making it difficult to achieve the expected results in the structural reinforcement of this connection area and posing safety hazards.

[0008] Therefore, there is an urgent need for a new type of reinforcement structure that can be easily installed in the narrow and confined space of the steel cage frame and has flexible adjustment capabilities to reliably adapt to the arrangement of steel bars of different specifications, thereby achieving effective and reliable reinforcement of structural defects at the connection between pile foundation and raft foundation.

[0009] In view of this, a reinforcement structure for the connection between pile foundation and raft slab is proposed. Summary of the Invention

[0010] The purpose of this invention is to provide a reinforcement structure for the connection between pile foundations and raft foundations, in order to solve the problems mentioned in the background art.

[0011] The present invention provides the following technical solution: a reinforcement structure for the connection between pile foundation and raft foundation, comprising a reinforcement frame and reinforcement arms; The reinforced frame consists of anchor components, column cylinders, and positioning components; The anchor piece is set at the end of the column tube, and the folding constraint between the two is realized by the positioning piece, so that the anchor piece can be flexibly inserted into the prefabricated woven steel cage, thereby reinforcing the steel structure at the connection between the pile foundation and the raft slab. The column tube is installed through the middle of the reinforcement arm, and the rotation angle of the reinforcement arm can be adjusted by the positioning component to adapt to pile foundation steel reinforcement structures of different specifications and achieve reinforcement. The positioning component is built into the column tube and is used to constrain the hinge state between the anchor and the column tube, while also realizing the adjustment of the flip angle of the reinforcing arm. The reinforcement arms are configured in four groups and arranged in a ring at equal intervals outside the column tube. Each group of reinforcement arms includes a flip arm and a reinforcement tube. The tilting arm is hinged to the outside of the column tube and is used to fit into the steel reinforcement structure of the pile foundation to achieve reinforcement. The reinforcing cylinder is slidably sleeved on the outside of the tilting arm to connect and restrain the pile foundation reinforcement, so that the pile foundation reinforcement is tightly abutted against the tilting arm, ensuring the reliability of the reinforcement.

[0012] According to the above technical solution, the anchor component includes a hinged column, a first support foot plate, a second support foot plate, and a reinforcing rib plate; The hinged column is hinged to the end of the column tube and connected to the positioning element to form a constraint fit. The first support foot plate and the second support foot plate are connected to the shaft end of the hinge column in a stacked rotatable manner, and the first support foot plate and the second support foot plate can be folded and stored relative to each other, so that the whole device can be inserted into the steel cage. The reinforcing ribs are configured as four, which are respectively slidably connected to the grooves at both ends of the first support foot plate and the second support foot plate, in order to enhance the stability of the connection between the first support foot plate, the second support foot plate and the column cylinder, and improve the load-bearing capacity of the anchor.

[0013] According to the above technical solution, the reinforcing rib plate includes rib bars, rollers, and connectors; One end of the rib is slidably engaged with the first or second support foot plate, and the other end is fixedly connected to the column tube through a connector. The roller is rotatably embedded in the slot of the first or second support foot plate, and is used to guide the ribs to roll and flip as the support foot plate folds, so as to avoid the ribs getting stuck or damaged.

[0014] According to the above technical solution, the connector is a bolt with an adjusting nut. The bolt shank and the rib are assembled by plug-in connection. The bolt head slides in the groove of the column cylinder and can be locked and fixed by adjusting the nut, so as to realize the adjustable and fixed position of the rib.

[0015] According to the above technical solution, the positioning component includes a toothed post, an adjusting stud, and an abutment post; The toothed column is slidably assembled inside the column cylinder and forms a transmission connection with the tilting arm to drive the tilting arm to tilt. The adjusting stud is rotatably installed at the end of the column cylinder and is threadedly connected to the toothed column. By rotating the adjusting stud, the toothed column can be driven to slide along the axial direction of the column cylinder. The abutment post is elastically slidably assembled inside the toothed post through an elastic element, and is used to insert into the hinge post to realize the positioning constraint of the foot piece and the column tube in the hinged state.

[0016] According to the above technical solution, the constraint end of the abutment post and the hinge post is set as a conical structure, which facilitates the quick insertion of the abutment post into the hinge post and improves the positioning and assembly efficiency.

[0017] According to the above technical solution, the elastic element adopts a special compression spring, which has good elastic restoring performance and fatigue resistance, and can ensure the positioning reliability and service life of the abutment post.

[0018] According to the above technical solution, the tilting arm includes a insert arm, a gear, and a toothed wheel; The insert arm is configured as two, arranged symmetrically in the upper and lower positions and hinged to the outside of the column tube, which can realize the flipping action simultaneously; The gear meshes with the toothed wheel for transmission, and the two are respectively fixedly connected to the shaft ends of the two insert arms to ensure that the flipping angle of the two insert arms is synchronized, thereby improving the reinforcement consistency of the reinforcing arm.

[0019] According to the above technical solution, the gear meshes with the toothed column for transmission, and the gear is fixedly connected to the lower insert arm to form a constraint. The gear is driven to rotate by the axial sliding of the toothed column, thereby driving the two insert arms to rotate synchronously.

[0020] According to the above technical solution, the reinforcing cylinder includes an open groove cylinder and a sliding column; The open slotted cylinder is slidably connected to the insert arm via a sliding column, and its position can be adjusted along the length of the insert arm to accommodate pile foundation reinforcements with different spacings, thus expanding the applicability of the device.

[0021] Compared with the prior art, the beneficial effects of the present invention, using the above technical solution, are as follows: 1. This application establishes an integrated operation process of "folding and storage - convenient insertion - unfolding support - locking and fixing" through the coordinated action of the anchor and positioning components. Before installation, construction personnel can flip the first and second support plates, causing them to fold relative to each other around the hinged column and fit against the outside of the column tube. At this time, the ribs of the reinforcing rib plate are folded along with the support plates, significantly reducing the overall radial dimension of the device and adapting it to the narrow operating space of the rebar cage. Subsequently, construction personnel can easily hold the column tube and quickly insert the folded device into the target position at the connection between the pile foundation and the raft slab from the gaps between the rebars in the rebar cage without forcibly prying the rebars, effectively avoiding stress disturbance to the original rebar structure and ensuring the original load-bearing capacity of the foundation structure. After insertion, the first and second support plates are unfolded, allowing them to abut against the rebars inside the rebar cage to form initial support. At this time, the abutment column of the positioning component is under the elastic force of the special compression spring. The device automatically inserts into the slot of the hinged column, quickly locking the foot piece and column tube into a hinged state to prevent accidental folding. Then, rotating the adjusting nut of the connector tightens the bolts, pulling the ribs together to secure the reinforcing ribs and enhance the stability of the connection between the support plate and the column tube, completing the entire installation and positioning process. On one hand, the integrated folding-unfolding-locking mechanism requires no complex tools and can be operated by a single person, significantly reducing labor costs compared to the multi-person collaborative installation mode of traditional reinforcement components. On the other hand, the folding design avoids hard collisions between the device and the reinforcing cage, while the elastic locking of the abutment column ensures the stability of the foot piece after installation. This solves the industry pain point of difficult installation in confined spaces and effectively protects the original reinforcing steel structure, reducing structural hazards caused by improper installation and laying a solid foundation for the reliability of subsequent reinforcement.

[0022] 2. This application constructs an adaptive control mechanism of "adjustment-transmission-synchronization" through the linkage of positioning components and tilting arms. Based on the diameter specifications of the pile foundation reinforcement, construction personnel rotate the adjusting stud at the end of the column tube. Since the adjusting stud is threadedly connected to the toothed column, the rotation is converted into a sliding motion of the toothed column along the axial direction of the column tube, achieving precise transmission of the adjustment action. When the toothed column slides, its outer teeth mesh with the gear of the tilting arm, driving the gear to rotate. The gear meshes with the toothed wheel, thereby synchronously tilting the two symmetrically arranged insert arms, achieving a linkage transmission from the adjustment action to the tilting action. When the insert arms tilt synchronously, their outer walls gradually adhere to the surface of the pile foundation reinforcement. Construction personnel can slide the reinforcement cylinder along the length of the insert arm according to the spacing of the pile foundation reinforcement. Through the sliding cooperation between the sliding column and the insert arm slide rail, the open slot cylinder is moved to the target position, inserting the pile foundation reinforcement into the open slot cylinder. The open slot cylinder then holds the steel... The reinforcing bars are tightly abutted against the outer wall of the insert arm, completing the adaptation and reinforcement of a single reinforcing bar arm. Because the four sets of reinforcing bar arms are arranged in a ring with equal spacing, the four sets of rotating arms rotate synchronously, and the reinforcing bar cylinder is adjusted and positioned synchronously, ultimately achieving comprehensive wrapping reinforcement of the pile foundation reinforcement. On the one hand, by adjusting the rotation of the stud, the rotating angle of the insert arm can be continuously adjusted, adapting to various diameters of pile foundation main reinforcement and stirrups. Compared with traditional fixed-specification reinforcement structures, the adaptability is wider, eliminating the need to customize special reinforcement components according to the reinforcement specifications, reducing construction costs and component storage difficulties. On the other hand, the meshing linkage of the gear and toothed wheel ensures the synchronous rotation of the upper and lower insert arms, and the ring arrangement of the four sets of reinforcing bar arms ensures the uniform distribution of reinforcement force, avoiding the stress concentration problem caused by uneven fit in traditional reinforcement structures. This makes the reinforcement at the pile foundation and raft foundation connection more uniformly stressed, improving the structural integrity and stability of the pile foundation and raft foundation connection.

[0023] 3. This application constructs an integrated reinforcement system of "bearing-load-transmission-protection" through the coordinated action of the anchor components, reinforcing ribs, and positioning components. After the anchor components are deployed and locked, the ribs of the reinforcing ribs are fixedly connected to the column tube through connectors. The four reinforcing ribs correspond to the two ends of the support foot plate, forming a symmetrical bearing structure. The pile foundation pressure borne by the anchor components is evenly transmitted to the column tube, and then transmitted to the four sets of reinforcing bar arms through the column tube. The reinforcing bar arms are tightly attached to the reinforcing bars through the open slot tube, further transmitting the pressure to the entire pile foundation reinforcing bar skeleton, realizing the coordinated transmission of bearing and force, avoiding component damage caused by excessive local stress, and greatly improving the overall bearing capacity of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structural support state of the present invention; Figure 2 This is a cross-sectional schematic diagram of the overall structural support state of the present invention; Figure 3This is a schematic diagram of the overall structure of the present invention in a folded state; Figure 4 This is a schematic diagram showing the disassembled structure of the foot component of the present invention; Figure 5 This is a schematic diagram of the connector structure of the present invention; Figure 6 This is a schematic diagram of the column tube structure of the present invention; Figure 7 This is a schematic diagram showing the disassembled structure of the positioning component of the present invention; Figure 8 This is a schematic diagram showing the disassembled structure of the reinforcing arm of the present invention.

[0025] The following are the labeling instructions in the diagram: 100, reinforced frame; 110, anchor piece; 120, column tube; 130, positioning piece; 200, reinforcing arm; 210, tilting arm; 220, reinforcing tube; 111, hinged column; 112, first support foot plate; 113, second support foot plate; 114, reinforcing rib plate; 115, rib reinforcement; 116, roller; 117, connector; 131, toothed column; 132, adjusting stud; 133, abutment column; 134, elastic element; 211, insert arm; 212, gear; 213, toothed wheel; 221, open slotted tube; 222, sliding column. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Reference Figure 1-3 A reinforcement structure for the connection between pile foundation and raft slab includes a reinforcement frame 100 and a reinforcement arm 200. The reinforcement frame 100 serves as the main support structure of the device, bearing the main load and force transmission functions. The reinforcement arm 200 is used to directly fit and constrain the pile foundation reinforcement to achieve precise reinforcement. The two work together to be conveniently installed in the narrow space of the reinforcement cage and can be adapted to different specifications of pile foundation reinforcement arrangement. This reinforcement structure for the connection between pile foundation and raft slab, by designing the anchor member 110 as a foldable structure, allows the first support foot plate 112 and the second support foot plate 113 to be folded relative to each other before installation, fitting snugly against the outer side of the column cylinder 120. Figure 3As shown, the overall radial dimension of the device is significantly reduced, making it easier for construction personnel to quickly insert the device into the target position at the connection between the pile foundation and the raft slab from the gaps between the reinforcing bars in the reinforcing cage. This avoids operational inconvenience caused by the device being too large, and at the same time prevents forced insertion from disturbing the original reinforcing steel structure, thus ensuring the stress performance of the original reinforcing steel. After insertion, the first support foot plate 112 and the second support foot plate 113 are unfolded so that they abut against the reinforcing steel structure inside the reinforcing cage, forming preliminary support and positioning, laying the foundation for subsequent reinforcement operations.

[0028] Reference Figure 2 , Figure 4 and Figure 7 The foot member 110, as the bottom support component of the reinforced frame 100, directly affects the overall reinforcement effect of the device. The foot member 110 includes a hinged column 111, a first support foot plate 112, a second support foot plate 113, and a reinforcing rib plate 114. The hinged column 111 is hinged to the lower end of the column cylinder 120 and can rotate around the axis of the column cylinder 120 to realize the folding and unfolding of the foot member 110. At the same time, the interior of the hinged column 111 is provided with a slot that matches the abutment column 133 to form a constraint fit with the positioning member 130, ensuring that the foot member 110 remains stable after unfolding and avoiding accidental overturning; the first support foot plate 112... The first support foot 112 and the second support foot 113 are connected to the shaft end of the hinge column 111 in a stacked rotatable manner. The two can rotate relative to each other around the axis of the hinge column 111 to achieve folding storage and unfolding support. The stacked design can ensure that the two fit tightly after folding, further reducing the volume. The four reinforcing ribs 114 are respectively slidably connected to the grooves at both ends of the first support foot 112 and the second support foot 113 to enhance the stability of the connection between the first support foot 112, the second support foot 113 and the column cylinder 120, improve the load-bearing capacity of the foot component 110, and prevent the support foot from deforming or breaking during the stress process.

[0029] This reinforcement structure for the connection between pile foundation and raft slab can, through the synergistic effect of the reinforcing ribs 114, evenly transfer the pressure borne by the anchor 110 to the column cylinder 120, and then through the column cylinder 120 to the reinforcing arm 200, thereby achieving uniform force distribution, improving the overall bearing capacity of the device, and adapting to the complex stress environment at the connection between pile foundation and raft slab.

[0030] Reference Figure 4 and Figure 5The reinforcing rib 114 includes ribs 115, rollers 116, and connectors 117. The ribs 115 are made of high-strength steel bars, possessing excellent compressive and shear resistance. One end of the ribs 115 slides freely along a groove in the first support foot plate 112 or the second support foot plate 113, while the other end is fixedly connected to the column cylinder 120 via the connector 117, ensuring a reliable connection between the reinforcing rib 114 and the column cylinder 120. The rollers 116 are rotatably mounted on the first support foot plate. The outer circumferential surface of the first support foot plate 112 or the second support foot plate 113 is in contact with the surface of the rib 115 in the slot. When the first support foot plate 112 and the second support foot plate 113 are folded or unfolded, the rib 115 will shift with the movement of the support foot plate. At this time, the roller 116 will rotate synchronously to guide the rib 115 to slide smoothly, avoiding jamming or friction damage between the rib 115 and the slide groove, and extending the service life of the rib 115; the connecting part 117 is a bolt with an adjusting nut, such as... Figure 5 As shown, the bolt's threaded portion and the rib 115 are assembled by a plug-in type, which is convenient for disassembly and installation. The bolt head slides into the groove of the column tube 120 and can slide up and down along the groove. When the support foot plate is extended to a suitable angle, the adjusting nut can be rotated to lock the connector 117 in place, so that the position of the rib 115 can be adjusted and fixed, ensuring that the reinforcing rib 114 is always in a taut state and plays the best role in reinforcement and support.

[0031] Reference Figure 2 , Figure 6 and Figure 7 The positioning component 130 is built into the inside of the column tube 120, such as... Figure 6As shown, the column cylinder 120 is a hollow structure used to house the positioning component 130. It is the core component for constraining the anchor component 110 and adjusting the angle of the reinforcing arm 200. The positioning component 130 includes a toothed column 131, an adjusting stud 132, and an abutment column 133. The toothed column 131 is slidably assembled inside the column cylinder 120, and its outer side is provided with evenly distributed teeth. It meshes with the gear 212 of the tilting arm 210 to drive the tilting arm 210 to tilt. The adjusting stud 132 is rotatably installed at the upper end of the column cylinder 120. Its lower end is threaded to the toothed column 131, and its upper end extends to the outside of the column cylinder 120 for easy operation by construction personnel. By rotating the adjusting stud 132 clockwise or counterclockwise, the toothed column 131 can be driven to slide up and down along the axial direction of the column cylinder 120, thereby driving the gear 212 to rotate. The abutment column 133 is elastically slidably assembled with the toothed column 131 through an elastic element 134. Inside the column 131, the elastic element 134 uses a special compression spring. This special compression spring has good elastic restoring performance and fatigue resistance, which can ensure the positioning reliability and service life of the abutment column 133. The lower end of the abutment column 133 is set as a conical structure, which facilitates quick insertion into the slot inside the hinge column 111 to realize the positioning constraint of the foot piece 110 and the column cylinder 120 in the hinged state. When the foot piece 110 is unfolded to a suitable angle, the abutment column 133 automatically inserts into the slot of the hinge column 111 under the elastic force of the elastic element 134, locking the position of the foot piece 110 and preventing it from being accidentally folded. When it is necessary to fold the foot piece 110, pull the adjusting stud 132 upward, drive the toothed column 131 to slide upward, and then drive the abutment column 133 to move upward, disengage from the slot of the hinge column 111, release the constraint, and the foot piece 110 can be folded.

[0032] Reference Figure 2 , Figure 7 and Figure 8The tilting arm 210, as the core load-bearing component of the reinforcement arm 200, is used to reinforce the pile foundation by fitting it against the steel reinforcement structure. The tilting arm 210 includes insert arms 211, gears 212, and toothed wheels 213. The two insert arms 211 are arranged symmetrically vertically and hinged to the outside of the column cylinder 120, and can synchronously tilt around the outer hinge point of the column cylinder 120. The outer wall of the insert arms 211 is provided with anti-slip texture, which can enhance the friction between the insert arms and the pile foundation steel reinforcement, prevent slippage after fitting, and improve the reliability of reinforcement. The gears 212 and toothed wheels 213 mesh and drive each other, and the two are respectively The gear 212 is fixedly connected to the shaft ends of the two insert arms 211. The gear 212 meshes with the toothed column 131 for transmission. The gear 212 is fixedly connected to the insert arm 211 located on the lower side and forms a constraint. When the toothed column 131 slides along the axial direction of the column cylinder 120, it will drive the gear 212 to rotate. The gear 212 drives the toothed wheel 213 to rotate in the opposite direction, thereby driving the upper and lower insert arms 211 to rotate synchronously. This ensures that the rotation angle of the two insert arms 211 is consistent, improves the reinforcement consistency of the reinforcement arm 200, and enables the four sets of reinforcement arms 200 to evenly fit the pile foundation reinforcement, achieving all-round reinforcement.

[0033] Reference Figure 1 , Figure 2 and Figure 8 The reinforcement arms 200 are configured in four groups, arranged in a ring at equal intervals outside the column tube 120, to constrain and reinforce the pile foundation reinforcement from four directions, ensuring comprehensive reinforcement. Each group of reinforcement arms 200 includes a flip arm 210 and a reinforcement tube 220. The reinforcement tube 220 is slidably sleeved on the outside of the flip arm 210 to connect and constrain the pile foundation reinforcement, ensuring a tight fit between the pile foundation reinforcement and the flip arm 210, guaranteeing the reliability of the reinforcement. The reinforcement tube 220 includes an open slotted tube 221 and a sliding column 222. The open slotted tube 221 is made of elastic metal material, and its opening has a chamfer to facilitate inserting the pile foundation reinforcement into the open slotted tube 221. The inner diameter of 221 is compatible with the diameter of common pile foundation steel bars, allowing it to tightly wrap around the pile foundation steel bars. At the same time, the elastic material can adapt to a certain range of steel bar diameter deviations, improving adaptability. The open slotted cylinder 221 is slidably connected to the insert arm 211 through the sliding column 222. The sliding column 222 is embedded in the slide rail of the insert arm 211 and can slide freely along the length of the insert arm 211, thereby driving the open slotted cylinder 221 to move synchronously. The position of the open slotted cylinder 221 can be adjusted according to the actual arrangement spacing of the pile foundation steel bars, so that the open slotted cylinder 221 can accurately fit the pile foundation steel bars, ensuring that each target reinforcement steel bar can be effectively constrained, avoiding local reinforcement defects, and expanding the applicability of the device.

[0034] Working principle: Refer to Figures 1 to 8 The specific operation procedure for this reinforcement structure used at the connection between the pile foundation and the raft slab is as follows: The first step is to assemble the device. Insert one end of the rib 115 of the reinforcing rib plate 114 into the groove of the first support foot plate 112 and the second support foot plate 113. Then, install the roller 116 into the corresponding slot. Finally, connect the other end of the rib 115 to the column cylinder 120 through the connector 117. Loosen the adjusting nut so that the rib 115 can slide freely. After assembling the toothed post 131, adjusting stud 132, abutting post 133 and elastic member 134 of the positioning member 130, place them inside the column cylinder 120, ensuring that the toothed post 131 is threadedly connected to the adjusting stud 132 and the abutting post 133 corresponds to the slot of the hinge post 111. Hinge the insert arm 211 of the tilting arm 210 to the outside of the column cylinder 120 to ensure that the gear 212 is engaged with the toothed column 131 and the toothed wheel 213. Then, sleeve the reinforcing cylinder 220 on the outside of the insert arm 211 through the sliding column 222 to complete the overall assembly of the device. The second step is device installation. Fold the first support foot plate 112 and the second support foot plate 113 together, fitting them against the column cylinder 120, so that the device is in a folded state. Figure 3 As shown, the construction worker holds the upper end of the column tube 120 and inserts the device into the target reinforcement position at the connection between the pile foundation and the raft slab through the gap between the steel bars in the steel cage; after insertion, the first support foot plate 112 and the second support foot plate 113 are unfolded so that they abut against the steel bars inside the steel cage. At this time, the abutment column 133 automatically inserts into the slot of the hinge column 111 under the elastic force of the elastic element 134, locking the position of the anchor piece 110. Then rotate the adjusting nut of the connector 117 to lock the rib 115, ensuring that the reinforcing rib 114 is in a taut state, and complete the fixing of the anchor 110; The third step is angle adjustment. According to the diameter specifications of the pile foundation reinforcement, rotate the adjusting stud 132 to drive the toothed column 131 to slide along the axial direction of the column cylinder 120. The toothed column 131 drives the gear 212 to rotate. Through the meshing transmission of the gear 212 and the toothed wheel 213, the upper and lower insert arms 211 are driven to rotate synchronously, so that the outer wall of the insert arm 211 is in contact with the surface of the pile foundation reinforcement. After the adjustment is completed, stop rotating the adjusting stud 132. Due to the self-locking property of the threaded connection, the toothed column 131 will remain in a fixed position, thereby locking the angle of the rotating arm 210. The fourth step is to constrain the reinforcing bars. Slide the reinforcing bar cylinder 220 along the length of the insert arm 211 so that the open slot cylinder 221 is aligned with the pile foundation reinforcing bars. Insert the reinforcing bars into the open slot cylinder 221. The open slot cylinder 221 tightly wraps the reinforcing bars, so that the reinforcing bars are in close contact with the outer wall of the insert arm 211, thus completing the constraint of a single reinforcing bar. Repeat the above operation to adjust the reinforcing bar cylinders 220 corresponding to the four sets of reinforcing bar arms 200 to the target position and fit them to constrain the corresponding pile foundation reinforcing bars. This completes the installation and reinforcement operation of the entire device.

[0035] In the description of this invention, it should be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the foregoing; the descriptions above and in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A reinforcement structure for the connection between pile foundation and raft slab, characterized in that, Includes a reinforced frame (100) and a reinforced arm (200); The reinforced frame (100) consists of anchor pieces (110), column tubes (120), and positioning pieces (130); The anchor (110) is located at the end of the column tube (120), and the folding constraint between the two is achieved by the positioning member (130), so that the anchor (110) can be flexibly inserted into the prefabricated woven steel cage, thereby reinforcing the steel structure at the connection between the pile foundation and the raft slab. The column tube (120) is installed through the middle of the reinforcing arm (200), and the rotation angle of the reinforcing arm (200) can be adjusted by the positioning component (130) to adapt to different specifications of pile foundation steel structure and achieve reinforcement; The positioning component (130) is installed inside the column tube (120) to constrain the hinge state between the anchor component (110) and the column tube (120), and at the same time realize the adjustment of the flip angle of the reinforcing arm (200). The reinforcement arms (200) are configured in four groups and arranged in a ring at equal intervals outside the column tube (120). Each group of reinforcement arms (200) includes a flip arm (210) and a reinforcement tube (220). The flip arm (210) is hinged to the outside of the column tube (120) for bonding with the pile foundation steel structure to achieve reinforcement; The reinforcing tube (220) is slidably sleeved on the outside of the flipping arm (210) to connect and constrain the pile foundation reinforcement, so that the pile foundation reinforcement and the flipping arm (210) are tightly abutted together, ensuring the reliability of the reinforcement.

2. The reinforcement structure for the connection between pile foundation and raft foundation according to claim 1, characterized in that: The foot piece (110) includes a hinged post (111), a first support foot plate (112), a second support foot plate (113), and a reinforcing rib plate (114). The hinged column (111) is hinged to the end of the column tube (120) and connected to the positioning member (130) to form a constraint fit; The first support foot plate (112) and the second support foot plate (113) are connected to the shaft end of the hinge column (111) in a stacked rotatable manner, and the first support foot plate (112) and the second support foot plate (113) can be folded and stored relative to each other, so that the whole device can be inserted into the steel cage. The reinforcing ribs (114) are configured as four, which are respectively slidably connected to the grooves at both ends of the first support foot plate (112) and the second support foot plate (113) to enhance the stability of the connection between the first support foot plate (112), the second support foot plate (113) and the column cylinder (120) and improve the load-bearing capacity of the foot piece (110).

3. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 2, characterized in that: The reinforcing rib (114) includes ribs (115), rollers (116), and connectors (117). One end of the rib (115) is slidably engaged with the first support foot plate (112) or the second support foot plate (113), and the other end is fixedly connected to the column tube (120) through the connector (117); The roller (116) is rotatably fitted into the slot of the first support foot plate (112) or the second support foot plate (113) to guide the rib (115) to roll and flip as the support foot plate is folded, so as to avoid the rib (115) from getting stuck or damaged.

4. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 3, characterized in that: The connector (117) is a bolt with an adjusting nut. The bolt shank and the rib (115) are assembled by plug-in connection. The bolt head slides into the groove of the column tube (120). It can be locked and fixed by adjusting the nut, so that the position of the rib (115) can be adjusted and fixed.

5. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 2, characterized in that: The positioning element (130) includes a toothed post (131), an adjusting stud (132), and an abutment post (133). The toothed column (131) is slidably assembled inside the column cylinder (120) and forms a transmission connection with the tilting arm (210) to drive the tilting arm (210) to tilt. The adjusting stud (132) is rotatably mounted on the end of the column cylinder (120) and threadedly connected to the toothed column (131). By rotating the adjusting stud (132), the toothed column (131) can be driven to slide along the axial direction of the column cylinder (120). The abutment post (133) is elastically slidably assembled inside the toothed post (131) through the elastic element (134) and is used to insert into the hinge post (111) to realize the positioning constraint of the foot piece (110) and the column tube (120) in the hinged state.

6. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 5, characterized in that: The constraint end of the abutment post (133) that mates with the hinge post (111) is set as a conical structure, which facilitates the quick insertion of the abutment post (133) into the hinge post (111) and improves the positioning and assembly efficiency.

7. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 5, characterized in that: The elastic element (134) is a special compression spring, which has good elastic restoring performance and fatigue resistance, and can ensure the positioning reliability and service life of the abutment post (133).

8. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 5, characterized in that: The tilting arm (210) includes a insert arm (211), a gear (212), and a toothed wheel (213). The insert arm (211) is configured as two, arranged symmetrically in the upper and lower positions and hinged to the outside of the column tube (120), which can realize the flipping action simultaneously; The gear (212) meshes with the toothed wheel (213) for transmission, and the two are respectively fixedly connected to the shaft ends of the two insert arms (211) to ensure that the flipping angle of the two insert arms (211) is synchronized, thereby improving the reinforcement consistency of the reinforcing arm (200).

9. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 8, characterized in that: The gear (212) meshes with the toothed column (131) for transmission, and the gear (212) is fixedly connected to the insert arm (211) located on the lower side to form a constraint. The gear (212) is driven to rotate by the axial sliding of the toothed column (131), thereby driving the two insert arms (211) to rotate synchronously.

10. A reinforcement structure for the connection between a pile foundation and a raft foundation according to claim 1, characterized in that: The reinforcing cylinder (220) includes an open groove cylinder (221) and a sliding column (222); The open slotted tube (221) is slidably connected to the insert arm (211) via a sliding column (222), and its position can be adjusted along the length of the insert arm (211) to accommodate pile foundation steel bars with different spacings, thus expanding the applicability of the device.

Images