A steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchored steel bars

Abstract

This invention relates to a steel section positioning auxiliary device based on distributed PBL precision-rolled threaded anchored steel bars, belonging to the field of steel section positioning technology. It includes threaded steel bars, an outer spring, an inner spring, an outer anchoring washer, an inner anchoring washer, a high-strength outer nut, and a high-strength inner nut. Anchoring holes are respectively opened at corresponding positions on two adjacent steel sections. The threaded steel bars pass through two anchoring holes and are symmetrically arranged with the two adjacent steel sections as the central axis. The outer spring and inner spring are respectively sleeved on the threaded steel bars, with the outer spring located outside the anchoring hole. The outer anchoring washer, inner anchoring washer, high-strength outer nut, and high-strength inner nut are respectively sleeved on the threaded steel bars corresponding to the outer and inner springs. The high-strength outer nut and high-strength inner nut are both spirally connected to the threaded steel bars and located outside the washer. Tightening the high-strength outer nut and inner nut locks the spring against the steel section. This invention solves the problem of the top of the steel section deflecting due to thermal stress during welding and splicing of existing steel-concrete sections.

Description

Technical Field

[0001] This invention belongs to the field of steel section positioning technology, specifically relating to a steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchoring steel bars. Background Technology

[0002] With the construction of bridges spanning the sea and rivers, steel-concrete composite structures are increasingly widely used. Steel sections act as the skeleton in concrete and have high strength and stiffness, making them an excellent structural design. Steel-concrete composite structures are composed of steel sections, main reinforcement, stirrups, and concrete. The core consists of steel structural members, but the presence of the steel sections disrupts the connection of the reinforcing steel skeleton, creating weak sections in the concrete near the steel sections. The steel sections weaken the lateral bonding of the concrete, making it prone to lateral defects under extreme construction loads. Therefore, it is necessary to strengthen the lateral bonding of the steel sections during construction. Furthermore, the construction of steel-concrete composite structures inevitably involves the extension of steel sections. However, in practice, due to welding heat deformation and localized cooling aging, the aligned steel sections often exhibit varying degrees of localized deflection at the top after welding and cooling. This deflection is not only difficult to correct but also affects the load-bearing performance of the concrete in that section and the subsequent extension of steel sections. Given the large number and specifications of steel sections in steel-concrete composite structures, there is an urgent need for a device that can strengthen the lateral bonding of steel-concrete composite structures and control welding heat deformation throughout the steel section welding process. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this invention provides a steel section positioning auxiliary device based on distributed PBL precision rolled thread anchored steel bars, which solves the problems of poor lateral load capacity of steel-concrete piles during construction and the deflection of the top of the steel section due to thermal stress during welding extension.

[0004] The objective of this invention can be achieved through the following technical solution: A steel section positioning auxiliary device based on distributed PBL precision rolled threaded anchoring steel bars, comprising threaded steel bars, an outer spring, an inner spring, an outer anchoring pad, an inner anchoring pad, a high-strength outer nut, and a high-strength inner nut. Anchoring holes are respectively opened at corresponding positions on two adjacent steel sections. The threaded steel bars pass through two anchoring holes and are symmetrically arranged with the two adjacent steel sections as the central axis. The outer spring and the inner spring are respectively sleeved on the threaded steel bars, with the outer spring located outside the anchoring hole and the inner spring located between the two adjacent steel sections. The outer anchoring pad, the inner anchoring pad, the high-strength outer nut, and the high-strength inner nut are respectively sleeved on the threaded steel bars corresponding to the outer spring and the inner spring. The high-strength outer nut and the high-strength inner nut are both spirally connected to the threaded steel bars and located outside the pad. The high-strength outer nut and the high-strength inner nut are locked to abut the spring against the steel section.

[0005] As a preferred embodiment of the present invention, a plurality of anchoring holes are uniformly provided on the steel profile, and the threaded steel on the same side is spaced apart from the corresponding anchoring holes of two adjacent steel profiles.

[0006] As a preferred embodiment of the present invention, the number of anchoring holes opened on the steel profile is an even number.

[0007] As a preferred embodiment of the present invention, both ends of the rebar are located on the outside of two adjacent steel sections.

[0008] As a preferred embodiment of the present invention, the outer walls of both ends of the rebar are uniformly provided with a number of scale lines.

[0009] As a preferred embodiment of the present invention, pressure sensors are provided on the contact surfaces of the outer anchor plate and the inner anchor plate with the spring, and the high-strength outer nut and the high-strength inner nut adjust the locking force according to the detection value of the pressure sensors.

[0010] As a preferred embodiment of the present invention, the steel section is an I-beam or an H-beam.

[0011] The beneficial effects of this invention are as follows: By rotating the high-strength inner nut and the high-strength outer nut to compress the inner and outer springs, the steel section can be subjected to two forces compressing towards the middle in the lateral direction. After the steel section is welded and extended, once the welded position has cooled, all the high-strength nuts are loosened to release excess thermal stress deformation under the anchor. This allows the excess thermal stress generated by welding to be released at a lower cost, avoiding stress concentration. This prevents the steel section from experiencing local deflection at its top due to stress concentration, thus improving the load-bearing capacity of the concrete section. It also solves the problems of poor lateral load-bearing capacity of existing steel-concrete piles during construction and the deflection of the top of the steel section due to thermal stress during welding extension. Attached Figure Description

[0012] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram showing the drilling positions and connection pairings of the steel profiles in this invention;

[0014] Figure 2 This is a structural schematic diagram of the threaded steel installation process of the present invention;

[0015] Figure 3 This is a top view of the structure of the present invention;

[0016] Explanation of main component symbols

[0017] In the diagram: 1. Structural steel; 2. High-strength outer nut; 3. Anchoring outer washer; 4. Outer spring; 5. Anchoring hole; 6. Inner spring; 7. Anchoring inner washer; 8. High-strength inner nut; 9. Threaded steel. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Please see Figures 1-3This embodiment provides a steel section positioning auxiliary device based on distributed PBL precision rolled threaded anchored steel bars, including threaded steel bars 9, outer springs 4, inner springs 6, anchoring outer pads 3, anchoring inner pads 7, high-strength outer nuts 2, and high-strength inner nuts 8. Anchoring holes 5 are opened on the steel section 1 that needs to be lengthened, and the anchoring holes 5 are arranged in pairs on two adjacent steel sections 1. The threaded steel bars 9 pass through two anchoring holes 5 and are symmetrically arranged with the two adjacent steel sections 1 as the central axis. When the threaded steel bars 9 pass through the anchoring holes 5 of the adjacent steel sections 1, the two inner springs 6 are respectively sleeved on the threaded steel bars 9 between the two adjacent steel sections 1 and close to the opposite side wall of the two steel sections 1. The outer springs 4 are sleeved at both ends of the threaded steel bars 9, that is, on the outside of the two adjacent steel sections 1, and the anchoring is completed. The inner pad 7 and the high-strength inner nut 8 are set one-to-one with the inner spring 6, and the anchoring outer pad 3 and the high-strength outer nut 2 are set one-to-one with the outer spring 4. Therefore, when the steel section 1 is extended, the inner spring 6 and the outer spring 4 are squeezed by rotating the high-strength inner nut 8 and the high-strength outer nut 2, so that the steel section 1 can be subjected to two forces squeezing towards the middle in the lateral direction. After the steel section 1 is welded and extended, after the welded position cools down, all the high-strength nuts are loosened to release the excess thermal stress deformation under the anchor. During the welding process, the welding area will be heated at high temperature, and the surrounding material will expand outward due to thermal expansion, resulting in compressive stress in the surrounding material. After the welding is completed, the weld and the surrounding material will gradually cool down and shrink during the cooling process. Due to the difference in thermal expansion and contraction between the welded area and the surrounding materials, internal thermal stress is generated. The pressure applied by these nuts further constrains the welded area, limiting the material's space for self-adjustment due to temperature changes. Therefore, when the high-strength nuts loosen, the tightening force originally applied to the component decreases, allowing the component to readjust its internal stress distribution. This allows excess thermal stress generated by welding to be released at a lower cost, avoiding stress concentration. This prevents local deflection of the top of steel section 1 due to stress concentration, improving the load-bearing capacity of the concrete in this segment. Furthermore, the use of threaded steel 9, springs, and nuts to connect multiple steel sections 1 to each other allows them to support each other, increasing the lateral support force of each steel section 1 and improving the lateral support force of the steel-concrete structure, ensuring the structural safety throughout the construction process.

[0020] Since adjacent steel sections 1 are supported by various components, in order to ensure the balance of support force among the steel sections 1 and to ensure that the structural performance of the steel-concrete structure does not decrease due to uneven stress, in this embodiment, several anchor holes 5 are evenly opened on the steel sections 1, and threaded steel bars 9 are spaced apart at the corresponding anchor holes 5 of two adjacent steel sections 1. By opening several anchor holes 5 on the steel sections 1 and then connecting two adjacent steel sections 1 with threaded steel bars 9, the steel section 1 in the middle of the multiple steel sections 1 will be connected to the steel sections 1 on the left and right sides at the same time. Therefore, when the threaded steel bars 9 are installed, the anchor holes 5 in the middle steel section 1 will be connected to the threaded steel bars 9 on the same side. The staggered connection avoids the concentration of stress points on the same steel section 1 when subjected to external forces. Furthermore, since the steel section 1 in the middle is subjected to external forces from both sides, when two stress points are concentrated but at different locations, the steel section 1 will generate torque under the action of these external forces, thus affecting its structural stability. Therefore, when connecting adjacent steel sections 1, the threaded steel bars 9 on the same side of the steel section 1 are spaced apart. Thus, the threaded steel bars 9 connected to the steel section 1 will connect to the steel sections 1 on both sides, increasing the stress range of the steel section 1, avoiding stress concentration, and keeping the forces on the left and right sides of the steel section 1 as balanced as possible, reducing the occurrence of torque under external forces.

[0021] In order to maintain the stress balance and stability of the steel section 1, in one embodiment, the number of anchor holes 5 opened on the steel section 1 is even. By making the stress points on the left and right sides of the steel section 1 the same when connecting, it is ensured that the stress on the steel section 1 can be kept balanced during welding, reducing the possibility of the steel section 1 deflecting after welding.

[0022] To ensure that the high-strength nut can apply sufficient pressure to the steel section 1 when tightening, in one embodiment, both ends of the threaded steel 9 are located outside the two adjacent steel sections 1. When the spring applies external force to the steel section 1, sufficient external force can be maintained so that both ends of the threaded steel 9 are located outside the two adjacent steel sections 1. In this way, the high-strength nut has enough distance to maintain the tightened state when tightening, avoiding the situation where the high-strength nut will fall off due to insufficient tightening length when subjected to external vibration, thus preventing uneven stress on the steel section 1 and the occurrence of deflection after welding.

[0023] To further ensure that a sufficiently stable external force can be applied to the profile 1 when the nut is tightened, in one embodiment, several scale lines are evenly provided on the outer walls of both ends of the threaded steel 9. By observing the positions of the scale lines on the profile 1 at both ends of the threaded steel 9, it can be determined whether the threaded steel 9 is symmetrical. This can ensure that the nut can maintain a sufficient locking length to ensure the locking force when tightened, thereby ensuring that the profile 1 has sufficient compressive force when the nut is tightened to compress the spring, so that the profile 1 can remain stable during the welding process.

[0024] To avoid inconsistencies in the installation accuracy of each section of steel 1 during the installation process and to release excess thermal stress after welding, in one embodiment, pressure sensors are provided on the contact surfaces of the anchoring outer pad 3 and the anchoring inner pad 7 with the spring. The high-strength outer nut 2 and the high-strength inner nut 8 adjust the locking force according to the detection value of the pressure sensors. By setting pressure sensors on the contact surfaces of the anchoring outer pad 3 and the anchoring inner pad 7 with the spring, it is ensured that the force applied by the spring to the section of steel 1 can be consistent, thereby avoiding the situation where the external force on both sides of the section of steel 1 is inconsistent, which would cause the section of steel 1 to deflect under the action of external force, thus ensuring the installation accuracy of the section of steel 1.

[0025] Since the present invention ensures the installation accuracy of the steel section 1 and limits the deformation of the steel section 1 caused by temperature changes during the welding process by applying external force to the steel section 1, in one embodiment, the steel section 1 is an I-beam or an H-beam. Both the I-beam and the H-beam can allow the spring to apply external force to the position that is prone to deformation to ensure the installation accuracy of the steel section 1 and eliminate thermal stress after welding, thereby ensuring the structural stability of the steel-concrete structure.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A profiled steel positioning aid for finishing threaded anchor steel based on distributed PBL, characterized by: The application relates to a type steel anchoring device, which comprises threaded steel, outer springs, inner springs, anchoring outer pads, anchoring inner pads, high-strength outer nuts and high-strength inner nuts, anchoring holes are formed in corresponding positions of two adjacent type steels, the threaded steel penetrates the two anchoring holes and is symmetrically arranged with the two adjacent type steels as the central axes, the outer springs and the inner springs are respectively sleeved on the threaded steel, the outer springs are located outside the anchoring holes, and the inner springs are located between the two adjacent type steels, the anchoring outer pads, the anchoring inner pads, the high-strength outer nuts and the high-strength inner nuts are respectively sleeved on the threaded steel corresponding to the outer springs and the inner springs, the high-strength outer nuts and the high-strength inner nuts are screw-connected with the threaded steel and are located outside the pads, and the high-strength outer nuts and the high-strength inner nuts lock the springs and the type steels.

2. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 1, characterized in that: The type steel is uniformly provided with a plurality of anchoring holes, and the threaded steels are arranged at the corresponding anchoring holes of the two adjacent type steels on the same side.

3. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 2, characterized in that: The number of the anchoring holes formed on the type steel is even.

4. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 1, characterized in that: The two ends of the threaded steel are located outside the two adjacent type steels.

5. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 1, characterized in that: The outer side walls of the two ends of the threaded steel are uniformly provided with a plurality of scale lines.

6. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 1, characterized in that: The abutting surfaces of the anchoring outer pads, the anchoring inner pads and the springs are respectively provided with pressure sensors, and the high-strength outer nuts and the high-strength inner nuts adjust the locking force according to the detection values of the pressure sensors.

7. The steel positioning aid based on the distributed PBL finish-rolled threaded anchor steel according to claim 1, characterized in that: The type steel is an I-shaped steel or an H-shaped steel.

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