Section steel positioning auxiliary device based on distributed PBL finish rolling thread anchoring steel bars

Abstract

The invention relates to a profile steel positioning auxiliary device based on distributed PBL finish rolling thread anchoring steel bars, and belongs to the technical field of profile steel positioning. Comprising deformed steel bars, an outer spring, an inner spring, an anchoring outer base plate, an anchoring inner base plate, a high-strength outer nut and a high-strength inner nut, anchoring holes are formed in the corresponding positions of the two adjacent section steel, and the deformed steel bars penetrate through the two anchoring holes and are symmetrically arranged with the two adjacent section steel as the central axis; the outer spring and the inner spring are arranged on the deformed steel bar in a sleeving mode, the outer spring is located on the outer side of the anchoring hole, the anchoring outer cushion plate, the anchoring inner cushion plate, the high-strength outer nut and the high-strength inner nut are arranged on the deformed steel bar corresponding to the outer spring and the inner spring in a sleeving mode, and the high-strength outer nut and the high-strength inner nut are both spirally connected with the deformed steel bar and located on the outer sides of the cushion plates. And the high-strength outer nuts and the high-strength inner nuts are locked to enable the springs to abut against the profile steel. The problem that when existing steel reinforced concrete profile steel is welded and lengthened, the top of the profile steel deflects due to thermal stress is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of section steel positioning, and in particular relates to a section steel positioning auxiliary device based on distributed PBL precision-rolled threaded anchor steel bars. Background Art

[0002] With the construction of bridges across the sea and rivers, steel-concrete structures are becoming more and more widely used. Steel plays the role of a skeleton in concrete and has great strength and stiffness, making it an excellent structural design. The steel-concrete composite structure is composed of steel, main reinforcement, stirrups and concrete structure, that is, the core part has steel structural components, but the existence of steel interrupts the connection of the steel skeleton, resulting in a weak section of concrete near the steel. The existence of steel weakens the transverse connection of concrete, and transverse defects are prone to occur under certain extreme construction conditions. Therefore, it is necessary to strengthen the transverse connection of steel during construction; and in the construction process of steel concrete, it is inevitable to involve the extension operation of steel segments. However, in actual operation, due to the effects of welding thermal deformation and local cooling aging, the steel groups aligned before welding often have different degrees of local deflection at the top after welding cooling, which is not only difficult to correct, but also affects the stress performance of the concrete in this segment, and at the same time affects the extension operation of the subsequent segment steel. The specifications and quantity of steel groups in steel concrete are numerous. Therefore, there is an urgent need for a device that can strengthen the transverse connection of steel concrete and control welding thermal deformation during the entire process of steel welding. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a steel positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bars, which solves the problems that the existing steel-concrete piles have poor lateral load capacity during construction and the top of the steel is deflected due to thermal stress when the steel is welded and extended.

[0004] The objective of the present invention can be achieved through the following technical solutions: A steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bars, comprising threaded steel, an outer spring, an inner spring, an anchoring outer pad, an anchoring inner 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 is penetrated by two anchoring holes and 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 and the outer spring is located outside the anchoring hole, and the inner spring is located between the two adjacent steel sections, the anchoring outer pad, the anchoring inner pad, the high-strength outer nut and the high-strength inner nut are respectively sleeved on the threaded steel 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 and are located outside the pad, and 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 technical solution of the present invention, a plurality of anchor holes are evenly opened on the steel section, and the threaded steel bars on the same side are arranged at intervals in the anchor holes corresponding to two adjacent steel sections.

[0006] As a preferred technical solution of the present invention, the number of the anchor holes opened on the steel section is an even number.

[0007] As a preferred technical solution of the present invention, both ends of the threaded steel bar are located outside two adjacent steel sections.

[0008] As a preferred technical solution of the present invention, the outer side walls of both ends of the threaded steel bar are evenly provided with a plurality of scale lines.

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

[0010] As a preferred technical solution of the present invention, the steel section adopts I-shaped steel or H-shaped steel.

[0011] The beneficial effects of the present invention are as follows: the inner spring and the outer spring are squeezed by rotating the high-strength inner nut and the high-strength outer nut, so that the steel section can be subjected to two squeezing forces toward the middle in the lateral direction. After the steel section is welded and extended, all the high-strength nuts are loosened after the welding position is cooled to release the excess thermal stress deformation under the anchor, so that the excess thermal stress generated by welding can be released at a lower cost, thus avoiding stress concentration, thereby avoiding the situation where the top of the steel section is locally deflected due to stress concentration, improving the stress-bearing performance of the concrete in this section, and solving the problems of the existing steel-concrete pile having poor lateral load capacity during construction and the top of the steel section being deflected due to thermal stress during welding and extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the punching positions and connection pairing of the steel section of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the threaded steel bar during installation of the present invention;

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

[0016] Main component symbols

[0017] In the figure: 1. Steel section; 2. High-strength outer nut; 3. Anchor outer pad; 4. Outer spring; 5. Anchor hole; 6. Inner spring; 7. Anchor inner pad; 8. High-strength inner nut; 9. Threaded steel. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0019] See also Figure 1-Figure 3The present embodiment provides a steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchoring steel bar, comprising a threaded steel bar 9, an outer spring 4, an inner spring 6, an anchor outer pad 3, an anchor inner pad 7, a high-strength outer nut 2 and a high-strength inner nut 8. An anchor hole 5 is opened on the steel section 1 that needs to be extended, and the anchor holes 5 are arranged in pairs on two adjacent steel sections 1. The threaded steel bar 9 is penetrated by two anchor holes 5 and is symmetrically arranged with the adjacent two steel sections 1 as the central axis. When the threaded steel bar 9 passes through the anchor holes 5 of the adjacent steel sections 1, the two inner springs 6 are respectively sleeved on the threaded steel bar 9, located between the adjacent two steel sections 1 and close to the opposite side wall of the two steel sections 1. The outer spring 4 is sleeved on both ends of the threaded steel bar 9, that is, the outer side of the adjacent two steel sections 1, and the anchor The inner pad 7 and the high-strength inner nut 8 are arranged in one-to-one correspondence with the inner spring 6, and the anchoring outer pad 3 and the high-strength outer nut 2 are arranged in one-to-one correspondence 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 squeezing forces toward the middle in the lateral direction. When the steel section 1 is welded and extended, wait until the welding position cools down, loosen all the high-strength nuts to release excess thermal stress deformation under the anchor. During the welding process, the welding area will experience high-temperature heating, and the nearby materials will expand outward due to thermal expansion, causing compressive stress in the surrounding materials. When the welding is completed, the weld and its surrounding materials will gradually cool down and shrink during the cooling process. Due to the difference in thermal expansion and cooling contraction between the welding area and the surrounding materials, internal thermal stress is generated, and the pressure applied by these nuts will cause the welding area to continue to be constrained, limiting the space for the material to adjust itself due to temperature changes. Therefore, when the high-strength nuts are loosened, the tightening force originally applied to the components is reduced, and the components can readjust their internal stress distribution, which allows the excess thermal stress generated by welding to be released at a lower cost, avoiding stress concentration, thereby avoiding the situation where the top of the steel section 1 is locally deflected due to stress concentration, thereby improving the stress-bearing performance of the concrete in this section, and through the action of threaded steel 9, springs and nuts, multiple steel sections 1 are connected to each other, allowing multiple steel sections 1 to support each other, thereby increasing the lateral support force of each steel section 1, improving the lateral support force of the steel concrete, and ensuring the structural safety of the entire construction process.

[0020] Since each adjacent steel section 1 supports each other through various components, in order to ensure the balance of the supporting force between each steel section 1 and ensure that the steel section 1 will not cause the stress performance of the steel concrete structure to decrease due to uneven force, in this embodiment, a plurality of anchor holes 5 are evenly opened on the steel section 1, and the threaded steel bars 9 are spaced apart in the anchor holes 5 corresponding to two adjacent steel sections 1. By opening a plurality of anchor holes 5 on the steel section 1 and then using the threaded steel bars 9 to connect two adjacent steel sections 1, the steel section 1 in the middle of the plurality of 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 anchor holes 5 on the same side as the threaded steel bars 9. The spaced connection avoids the concentration of stress points on the same steel section 1 when subjected to external force, and because the steel section 1 located in the middle position will be subjected to external forces on both sides, when two stress points are concentrated and the stress positions are different, the steel section 1 at this time will generate torque under the action of the external force, thereby affecting the structural stability of the steel section 1. Therefore, when connecting adjacent steel sections 1, the threaded steel bars 9 on the same side of the steel section 1 will be arranged at intervals, so the threaded steel bars 9 connected to the steel section 1 will be connected to the steel sections 1 on both sides on the left and right, thereby increasing the stress range of the steel section 1 and avoiding the occurrence of stress concentration. At the same time, the forces on the left and right sides of the steel section 1 are kept balanced as much as possible, reducing the occurrence of torque generated by the steel section 1 under the action of external force.

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

[0022] In order 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 on the outside of the two adjacent steel sections 1. When the external force is applied to the steel section 1 by the spring, sufficient external force can be maintained so that both ends of the threaded steel 9 are located on the outside of the two adjacent steel sections 1. In this way, the high-strength nut has enough distance to maintain the locked state when tightening, avoiding the high-strength nut from falling off when subjected to external force vibration due to insufficient locking length during tightening, thereby causing uneven force on the steel section 1 and causing deflection after welding.

[0023] In order to further ensure that a sufficiently stable external force can be applied to the steel section 1 when the nut is locked, in one embodiment, a plurality of scale lines are evenly arranged on the outer side walls of the two ends of the threaded steel 9. By observing the positions of the scale lines at the two ends of the threaded steel 9 on the steel section 1, it can be judged whether the threaded steel 9 remains symmetrical. In this way, it can be ensured as much as possible that the nut can maintain a sufficient locking length when locked to ensure the locking force, thereby ensuring that the steel section 1 can have sufficient extrusion force when the nut is locked and the compression spring is tightened to ensure that the steel section 1 can remain stable during the welding process.

[0024] External force is applied to the steel sections 1 to avoid the accuracy of each steel section 1 during the installation process and to release the excess thermal stress after welding. In one embodiment, pressure sensors are provided on the contact surfaces of the anchor outer pad 3 and the anchor 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 sensor. Pressure sensors are provided on the contact surfaces of the anchor outer pad 3 and the anchor inner pad 7 with the spring to ensure that the force applied by the spring to the steel section 1 can be kept consistent, thereby avoiding the situation where the external forces on both sides of the steel section 1 are inconsistent and the steel section 1 is deflected under the action of the external force, thereby ensuring the installation accuracy of the steel section 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 adopts an I-shaped steel or an H-shaped steel. The I-shaped steel or the H-shaped steel 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 the thermal stress after welding is completed, thereby ensuring the structural stability of the steel-concrete.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A steel positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bars, characterized in that: It includes threaded steel, an outer spring, an inner spring, an anchoring outer pad, an anchoring inner 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 is penetrated by two anchoring holes and is 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 and the outer spring is located outside the anchoring hole. The inner spring is located between the two adjacent steel sections. The anchoring outer pad, the anchoring inner pad, the high-strength outer nut and the high-strength inner nut are respectively sleeved on the threaded steel 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 and are located outside the pad. The high-strength outer nut and the high-strength inner nut are locked to make the spring abut against the steel section.

2. According to claim 1, a steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar is characterized in that: A plurality of anchor holes are evenly arranged on the steel sections, and the threaded steel bars on the same side are arranged at intervals in the anchor holes corresponding to two adjacent steel sections.

3. The steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar according to claim 2 is characterized in that: The number of anchor holes opened on the steel section is an even number.

4. The steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar according to claim 1, characterized in that: Both ends of the threaded steel bar are located outside two adjacent steel sections.

5. The steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar according to claim 1, characterized in that: A plurality of scale lines are evenly arranged on the outer side walls of both ends of the threaded steel bar.

6. The steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar according to claim 1, characterized in that: The contact surfaces of the anchoring outer pad and the anchoring inner pad with the spring are both provided with pressure sensors, and the high-strength outer nut and the high-strength inner nut adjust the locking force according to the detection value of the pressure sensor.

7. The steel section positioning auxiliary device based on distributed PBL fine-rolled threaded anchor steel bar according to claim 1, characterized in that: The steel section is I-shaped steel or H-shaped steel.

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