High-strength hollow interlayer concrete rod structure

Abstract

The high-strength hollow interlayer concrete rod structure comprises an inner steel pipe and an outer steel pipe, a concrete interlayer is poured between the inner steel pipe and the outer steel pipe, a plurality of auxiliary steel pipes are evenly buried in the concrete interlayer in the circumferential direction, a connecting base is arranged at one end of each auxiliary steel pipe, and a buckle plate is arranged on the side, away from the axis, of each connecting base. A threaded hole is formed in the pipe wall of the outer steel pipe in the radial direction, a locking bolt is in threaded connection with the outer steel pipe through the threaded hole, and the end of the locking bolt makes contact with the buckle plate in the axis direction. By means of the design that the connecting base and the connecting block are in butt joint, the buckling plate of the connecting base is buckled into the clamping groove of the connecting block through the locking bolt, stable clamping is achieved, swing of the upper rod piece in the hoisting butt joint process is effectively relieved, and potential safety hazards are reduced; and the bearing capacity and the bending rigidity of the whole structure are enhanced, so that the connection is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow sandwich steel tube concrete, in particular to a high-strength hollow sandwich concrete rod structure. Background Art

[0002] Concrete-filled double-skin steel tube (CFDST) is a composite component consisting of two concentric steel tubes, with concrete poured between the steel tubes. CFDST components are similar to solid steel tube concrete, with advantages such as high strength and good ductility. Compared with solid steel tube concrete, CFDST components have reduced deadweight but increased bending stiffness, making them more suitable for components that are sensitive to stiffness requirements. The excellent performance of CFDST makes it have good application prospects in structures such as offshore platform support columns, transmission towers, pile foundations and bridge piers.

[0003] After the application of the above CFDST is completed, the overall structure height is high, so an extra-long rod structure is required. The extra-long rod body is also difficult to transport and carry, so it is necessary to split it into short rods to reduce transportation costs. In addition, in material mechanics, the strength and stability of a rod are directly related to its length. Shorter rods are less likely to break than longer rods because they produce smaller bending moments when subjected to the same force, so they are more stable. From the perspective of stiffness, stiffness refers to the ability of a material or structure to resist elastic deformation. When subjected to the same load, the deformation of shorter rods is usually less than that of long rods, which means that they have higher stiffness and provide better support and stability. In practical applications, the usual way is to connect short rods end to end using connectors such as bolts, screws, rivets or welding. When the short rods are connected for reinforcement, the upper short rods need to be kept in the concentric state with the lower short rods by hoisting equipment. However, the upper short rods will swing when subjected to unexpected factors such as wind, which may cause safety hazards such as collisions to operators. Utility Model Content

[0004] The utility model aims to provide a high-strength hollow sandwich concrete rod structure, which can facilitate on-site workers to dock and maintain a safe construction environment.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: a high-strength hollow sandwich concrete rod structure, including an inner steel pipe and an outer steel pipe, a concrete interlayer is poured between the inner steel pipe and the outer steel pipe, a plurality of auxiliary steel pipes are evenly buried in the circumferential direction of the concrete interlayer, a connecting seat is provided at one end of the auxiliary steel pipe, a buckle plate is provided on the side of the connecting seat away from the axis, a connecting block that is clamped and adapted to the docking seat is provided at the other end of the auxiliary steel pipe, threaded holes are radially opened on the pipe wall of the outer steel pipe, a locking bolt is threadedly connected to the outer steel pipe through the threaded holes, and the end of the locking bolt contacts the buckle plate toward the axial direction.

[0006] Preferably, the connecting seats are connected in sequence through brackets, the brackets are hollow structures, a spring is axially arranged inside the brackets, steel balls are arranged at both ends of the springs, and the steel balls are snap-fitted with grooves on both sides of the connecting blocks.

[0007] Preferably: a plurality of positioning buckles are circumferentially spaced apart on the outer wall surface of the inner steel pipe and the inner wall surface of the outer steel pipe, steel bars are passed through and fixed on the positioning buckles, the steel bars are processed into a spiral structure and a pre-tightening force is applied, and the positioning buckles are rotated and adjusted to a corresponding angle according to the pitch of the steel bar spiral.

[0008] Preferably: a first hoop is provided at one end of the outer steel pipe close to the connecting seat, and a second hoop is provided at the other end of the outer steel pipe, and both the first hoop and the second hoop are provided with a serrated structure, wherein the serrated structure of the first hoop is provided with a through hole corresponding to the threaded hole of the outer steel pipe.

[0009] Preferably, a reinforcement ring is provided on the outer side of the first hoop and the second hoop, and a plurality of groups of reinforcement holes are evenly arranged in the circumferential direction of the reinforcement ring, and oblique wires are fixed to the reinforcement holes.

[0010] Preferably: a reinforcement seat is provided in the circumference of the through hole, and a reinforcement rib is provided in the circumference of the reinforcement seat.

[0011] Preferably, the tube wall of the outer steel tube is provided with a web, and the web is provided with a mounting hole.

[0012] Compared with the prior art, the utility model has the following advantages and effects:

[0013] The utility model adopts a design of docking the connection seat with the connection block, and then uses locking bolts to buckle the buckle plate of the connection seat into the slot of the connection block to achieve stable clamping, which effectively alleviates the swing of the upper rod during the lifting and docking process and reduces safety hazards. The addition of the concrete interlayer and auxiliary steel pipe between the inner steel pipe and the outer steel pipe enhances the bearing capacity and bending stiffness of the overall structure, making the connection more stable. The above-mentioned optimized connection design simplifies the docking work of on-site workers and improves construction efficiency. In addition, the combination of positioning buckles and spiral structural steel bars provides better seismic resistance and is suitable for construction operations in earthquake zones. In addition, the web design of the outer steel pipe provides a variety of installation possibilities, increasing the application range of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of a high-strength hollow sandwich concrete rod structure according to an embodiment of the utility model.

[0015] Figure 2 It is a cross-sectional view of a high-strength hollow sandwich concrete rod structure according to an embodiment of the utility model.

[0016] Figure 3 It is an internal schematic diagram of a high-strength hollow sandwich concrete rod structure according to an embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the outer steel pipe structure of an embodiment of the utility model.

[0018] Figure 5 It is a cross-sectional schematic diagram of a docking node according to an embodiment of the utility model.

[0019] Figure 6 It is a cross-sectional schematic diagram of a docking node according to an embodiment of the utility model.

[0020] Figure 7 It is a structural schematic diagram of an electric tower according to an embodiment of the utility model.

[0021] Figure 8 It is a structural schematic diagram of a suspension bridge according to an embodiment of the utility model.

[0022] Figure numbers: inner steel pipe 1, positioning buckle 11, steel bar 12, outer steel pipe 2, threaded hole 21, first hoop 22, through hole 221, reinforcement seat 222, reinforcement rib 223, second hoop 23, serrated structure 231, reinforcement ring 232, reinforcement hole 233, web 24, mounting hole 241, locking bolt 25, concrete interlayer 3, auxiliary steel pipe 4, connecting seat 41, buckle plate 411, connecting block 42, slot 421, groove 422, bracket 43, spring 431, steel ball 432, inclined cable 5, chord 61, web 62, cable 63, hanger 64, bridge deck 65. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0024] See also Figure 1 - Figure 6In the present embodiment, a high-strength hollow sandwich concrete pole structure is involved, which is specifically used in situations where an extra-long pole structure is required, such as power transmission lines, communication lines and other structures that require high-strength support, and specifically includes: an inner steel pipe 1 and an outer steel pipe 2, a concrete interlayer 3 is poured between the inner steel pipe 1 and the outer steel pipe 2, a plurality of auxiliary steel pipes 4 are evenly buried in the circumferential direction of the concrete interlayer 3, a connecting seat 41 is provided at one end of the auxiliary steel pipe 4, a buckle plate 411 is provided on the side of the connecting seat 41 away from the axis, and a connecting block 42 that is snap-fitted with the docking seat is provided at the other end of the auxiliary steel pipe 4, a threaded hole 21 is radially opened on the pipe wall of the outer steel pipe 2, a locking bolt 25 is threadedly connected to the outer steel pipe 2 through the threaded hole 21, and the end of the locking bolt 25 contacts the buckle plate 411 toward the axial direction.

[0025] Specifically, in this embodiment, inner and outer steel pipes 2 of appropriate diameter and wall thickness are selected during processing in the factory. The outer diameter of the inner steel pipe 1 should be smaller than the inner diameter of the outer steel pipe 2, and the difference between the two should be greater than the outer diameter of the auxiliary steel pipe 4. A spacer is set between the inner steel pipe 1 and the outer steel pipe 2 to ensure that the inner steel pipe 1 and the outer steel pipe 2 remain concentric, and the auxiliary steel pipe 4 is evenly inserted between the two. High-strength concrete is poured between the inner and outer steel pipes 2 by pumping or other means to form a concrete interlayer 3. A plurality of auxiliary steel pipes 4 are evenly arranged circumferentially in the concrete interlayer 3 to enhance the bearing capacity of the overall structure. During the on-site installation and docking process, after the lower rod body keeps its connecting seat 41 of the auxiliary steel pipe 4 facing upward and fixed, the upper rod is lifted vertically into place using a lifting device, so that the connecting block 42 of the auxiliary steel pipe 4 of the upper rod body faces downward and aligns with the connecting seat 41 of the lower rod body, and the height of the upper rod body is gradually lowered, so that the connecting block 42 of the upper rod body is inserted into the connecting seat 41 of the lower rod body. At this time, the rod bodies have been initially fixed, and the upper rod body will not shake, ensuring the stable docking between the rod bodies and reducing the potential safety hazards caused by shaking. The operator pushes the buckle plate 411 by tightening the locking bolt 25, and the buckle plate 411 is squeezed and deformed and pushed toward the connecting block 42. The connecting block 42 is provided with a slot 421 on one side of the buckle plate 411, and the deformed end of the buckle plate 411 is pushed into the slot 421 and connected. At this time, the connecting block 42 is stuck by the connecting seat 41, achieving the connection locking effect inside the rod. When reinforcing the connection parts between the rods, the lifting equipment can lift the remaining rods to prepare for the next stage of docking operations, thereby improving the construction efficiency of the overall structure.

[0026] See also Figure 6, the connecting seat 41 is connected in sequence through the bracket 43, the bracket 43 adopts a hollow structure, a spring 431 is axially arranged inside the bracket 43, and steel balls 432 are arranged at both ends of the spring 431, and the steel balls 432 are snap-fitted with the grooves 422 at both sides of the connecting block 42. In this embodiment, when the connecting block 42 is inserted into the connecting seat 41, the steel balls 432 at both ends of the bracket 43 are pushed into the grooves 422 of the connecting block 42 under the elastic force of the spring 431, and the collision sound of the steel balls 432 and the connecting block 42 is generated during the pushing process, and the collision sound is used to give instant feedback to the operator, so that the operator can judge whether the connecting block 42 is inserted into the connecting seat 41, realize rapid positioning, and improve installation efficiency and safety. At the same time, after the insertion is completed, a part of the steel ball 432 is located in the connection seat 41, and the other part is located in the groove 422 of the connection block 42. When the rod is subjected to a lateral load (such as a bending moment caused by airflow), the rod is subjected to a bending moment, and the connection seat 41 and the connection block 42 are squeezed and relatively displaced. At this time, the steel ball 432 is subjected to the shear force between the connection seat 41 and the connection block 42, preventing the relative displacement between the connection seat 41 and the connection block 42, thereby maintaining the connection stability between the rod bodies. This connection method not only improves the convenience and safety of construction, but also ensures the stability of the structure when subjected to external loads, and solves the shortcomings of traditional connection methods in terms of installation feedback and resistance to lateral loads.

[0027] See also Figure 4 , the end of the outer steel pipe 2 close to the connection seat 41 is provided with a first hoop 22, and the other end of the outer steel pipe 2 is provided with a second hoop 23, and the first hoop 22 and the second hoop 23 are both provided with a sawtooth structure 231, wherein the sawtooth structure 231 of the first hoop 22 is provided with a through hole 221 corresponding to the threaded hole 21 of the outer steel pipe 2. In this embodiment, the bottom of the sawtooth structure 231 of the first hoop 22 is flush with the inner bottom surface of the connection seat 41, and the teeth of the sawtooth structure 231 of the second hoop 23 are flush with the end of the connection block 42. When the upper rod is connected with the lower rod, the first hoop 22 of the lower rod and the second hoop 23 of the upper rod are spliced, and the first hoop 22 and the second hoop 23 are spliced ​​through the sawtooth structure 231. In this state, the connection block 42 contacts the inner bottom surface of the connection seat 41, indicating that the connection block 42 of the upper rod and the connection seat 41 of the lower rod have been installed in place. The locking bolt 25 is passed through the through hole 221 of the first hoop 22. During the tightening process of the locking bolt 25, since the locking bolt 25 will occupy the space of the concrete interlayer 3, the concrete interlayer 3 at the connection position will produce debris, causing the rod body at the connection position to expand. The first hoop 22 and the second hoop 23 after docking form a constraint on the outer steel pipe 2, which can effectively limit the deformation of the outer steel pipe 2 at this position, enhance the stability of the connection position, and ensure long-term stable use.

[0028] The through hole 221 is provided with a reinforcing seat 222 in the circumference thereof, and the reinforcing seat 222 is provided with a reinforcing rib 223 in the circumference thereof. During the tightening process of the locking bolt 25, the stress concentration at the connection between the locking bolt 25 and the outer steel pipe 2 is likely to cause damage to the threaded hole 21, and a reinforcing seat 222 is provided in the circumference thereof, and a reinforcing rib 223 is provided in the circumference thereof. The reinforcing seat 222 and the reinforcing rib 223 can effectively enhance the connection strength at the threaded hole 21 of the outer steel pipe 2. In addition, when the threaded structure of the outer steel pipe 2 is damaged, a threaded structure can be provided in the through hole 221 or an anchor bolt can be inserted through the through hole 221 (the original locking bolt 25 needs to be removed), so as to further enhance the squeezing effect of the locking bolt 25 on the connection seat 41, and thus make the connection part between the rods more stable.

[0029] See also Figure 3 - Figure 4 The outer wall of the inner steel pipe 1 and the inner wall of the outer steel pipe 2 are circumferentially spaced with a number of positioning buckles 11, and the positioning buckles 11 are penetrated and fixed with steel bars 12. The steel bars 12 are processed into a spiral structure and a pre-tightening force is applied. The positioning buckles 11 are rotated and adjusted to a corresponding angle according to the pitch of the spiral of the steel bars 12. The steel bars 12 are arranged on both sides of the concrete interlayer 3 and wrapped therein, thereby increasing the compressive strength of the concrete interlayer 3. The steel bars 12 with a spiral structure have an elastic effect under the action of the pre-tightening force, and have a certain earthquake resistance under crustal activities such as earthquakes, and are suitable for construction operations in earthquake zones. In addition, by adjusting the angle of the positioning buckle 11, the installation and fixation of steel bars 12 with different pitches can be achieved, and the earthquake resistance effect also changes accordingly, which is suitable for areas with different earthquake intensities.

[0030] The first hoop 22 and the second hoop 23 are both provided with a reinforcement ring 232 on the outside. The reinforcement ring 232 is evenly provided with a plurality of groups of reinforcement holes 233 in the circumferential direction. The reinforcement holes 233 are fixed with the inclined wires 5. The inclined wires 5 are fixed through the reinforcement holes 233, and the other ends of the inclined wires 5 are fixed to other parts of the rod structure or the ground, forming a stable tension structure. In this embodiment, the application of the reinforcement ring 232 and the inclined wires 5 significantly improves the stability of the rod structure, and can avoid tipping caused by wind load or the displacement of its own center of gravity. The design of the inclined wires 5 enables the rod structure to better resist the influence of wind force, and is particularly suitable for applications in high altitudes or open areas.

[0031] The tube wall of the outer steel tube 2 is provided with a web 24, and the web 24 is provided with a mounting hole 241. In this embodiment, when the rods are arranged obliquely (electric tower) or horizontally (suspension bridge), they are mainly subjected to bending moment. Figure 7 When working on the tower, the rod is used as the chord 61, and its side needs to be installed with a web 62, which is connected by welding, bolts, etc. at the web 24 to achieve fixed support between the chords 61. Figure 8During bridge operation (suspension bridge), the rod member acts as a chord 61, which is mainly subjected to bending moment. The cable 63 is installed through the mounting hole 241 on the side, and the cable 63 is fixed to the hanger 64 to form a direct connection between the cable 63 and the bridge deck 65, which increases the longitudinal and transverse stiffness of the entire structure, can effectively disperse the bending moment, and also improves the wind resistance and stability of the bridge deck 65. The design of the web 24 and the mounting hole 241 provides the rod member with a multifunctional use possibility, whether in a tower or a bridge, the stability and load-bearing requirements of the structure can be met through appropriate configuration.

[0032] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. A high-strength hollow sandwich concrete rod structure, comprising an inner steel pipe and an outer steel pipe, with a concrete interlayer poured between the inner steel pipe and the outer steel pipe, characterized in that: A plurality of auxiliary steel pipes are evenly buried in the inner circumference of the concrete interlayer, a connecting seat is provided at one end of the auxiliary steel pipe, a buckle plate is provided on the side of the connecting seat away from the axis, a connecting block that is snap-fitted with the docking seat is provided at the other end of the auxiliary steel pipe, threaded holes are radially opened on the wall of the outer steel pipe, locking bolts are threadedly connected to the outer steel pipe through the threaded holes, and the end of the locking bolt contacts the buckle plate toward the axis.

2. A high-strength hollow sandwich concrete rod structure according to claim 1, characterized in that: The connecting seats are connected in sequence through brackets. The bracket adopts a hollow structure, and a spring is axially arranged inside the bracket. Steel balls are arranged at both ends of the spring. The steel balls are clamped and adapted to the grooves on both sides of the connecting block.

3. The high-strength hollow sandwich concrete rod structure according to claim 1, characterized in that: The outer wall surface of the inner steel pipe and the inner wall surface of the outer steel pipe are circumferentially spaced with a plurality of positioning buckles, steel bars are passed through and fixed to the positioning buckles, the steel bars are processed into a spiral structure and a pre-tightening force is applied, and the positioning buckles are rotated and adjusted to a corresponding angle according to the pitch of the steel bar spiral.

4. A high-strength hollow sandwich concrete rod structure according to claim 2, characterized in that: A first hoop is provided at one end of the outer steel pipe close to the connecting seat, and a second hoop is provided at the other end of the outer steel pipe. Both the first hoop and the second hoop are provided with a serrated structure, wherein the serrated structure of the first hoop is provided with a through hole corresponding to the threaded hole of the outer steel pipe.

5. A high-strength hollow sandwich concrete rod structure according to claim 4, characterized in that: The first hoop and the second hoop are both provided with reinforcement rings on the outside. The reinforcement rings are evenly provided with multiple groups of reinforcement holes in the circumferential direction, and the reinforcement holes are fixed with oblique wires.

6. The high-strength hollow sandwich concrete rod structure according to claim 4, characterized in that: A reinforcement seat is provided in the circumference of the through hole, and a reinforcement rib is provided in the circumference of the reinforcement seat.

7. The high-strength hollow sandwich concrete rod structure according to claim 1, characterized in that: The tube wall of the outer steel tube is provided with a web plate, and the web plate is provided with a mounting hole.

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