Integral pre-burying device for steel structure foundation bolt

Abstract

The utility model relates to an integral pre-embedding device for a steel structure foundation bolt, which solves the technical problem that the existing steel structure foundation bolt is low in field installation and construction efficiency, and comprises a foundation short pile, a foundation reinforcing steel bar is reserved on the upper end face of the foundation short pile, an outer hoop reinforcing steel bar is fixed on the foundation reinforcing steel bar, and elevation adjusting columns are placed on two sides of the foundation short pile. A cross beam is placed on the elevation adjusting column, a positioning plate is placed on the cross beam, positioning holes are formed in the periphery of the positioning plate, foundation bolts are arranged in the positioning holes in a penetrating mode, lower nuts are installed on the foundation bolts, reinforcing steel bars are fixed between the foundation bolts and the foundation steel bars, and concrete is poured in the foundation steel bars. And the method has the characteristics of one-time forming, simplicity and convenience in installation, high precision, high environmental friendliness and the like, and the precision of pre-embedded construction and the speed of field installation are improved. And the generation of field electric welding arc light is reduced. The construction period is shortened, the green construction index is improved, environmental pollution is reduced, and economic benefits are increased.

Description

Technical Field

[0001] This utility model relates to the field of steel structure installation technology, specifically to an integrated pre-embedded device for steel structure anchor bolts. Background Technology

[0002] Steel structure is a common structural form in modern construction engineering. Steel structure projects are lightweight, highly reliable, and the steel has good seismic and impact resistance. They are manufactured with a high degree of industrialization, have fast installation speed, allow for large and flexible partitioning of interior spaces, and are easy to make into enclosed structures.

[0003] With my country's economic development and increasingly stringent environmental protection requirements, steel structure engineering is becoming a highlight in more and more industrial plants and trade markets. Currently, the pre-embedding method for steel structure anchor bolts is basically on-site assembly of single or multiple bolts. This construction method is slow and pollutes the surrounding environment due to the electric arc light generated during on-site welding, which is detrimental to environmental protection.

[0004] To further improve on-site construction technology, this utility model innovatively provides an integrated pre-embedded device for steel structure anchor bolts. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides an integral pre-embedded device for steel structure anchor bolts. This utility model has a novel structure and ingenious design, and effectively solves the technical problem of low on-site installation efficiency of existing steel structure anchor bolts.

[0006] An integral pre-embedded device for anchor bolts of steel structures is characterized by comprising an operating platform, on which a positioning plate is placed, and multiple evenly distributed positioning holes are opened around the positioning plate. Anchor bolts are inserted into the positioning holes from bottom to top. A lower nut placed at the lower end of the positioning plate and an upper nut placed at the upper end of the positioning plate are installed on the anchor bolts. Multiple anchor bolts are connected by multiple positioning steel bars to form an anchor bolt cage.

[0007] Preferably, it also includes foundation short piles, wherein multiple evenly distributed foundation steel bars are pre-cast around the upper end face of the foundation short piles, and external reinforcing bars are fixed on the multiple foundation steel bars. Elevation adjustment columns are placed on both sides of the foundation short piles, and crossbeams are placed on the elevation adjustment columns. Anchor bolt cages placed inside the foundation steel bars are placed on the crossbeams, and reinforcing bars are fixed between the anchor bolt cages and the foundation steel bars.

[0008] Preferably, the elevation adjustment column includes a base plate, an adjustment cylinder is fixed on the base plate, an adjustment screw is threaded into the adjustment cylinder, a limit plate is fixed at the top of the adjustment screw, and a rotating handle is fixed on the adjustment screw.

[0009] Preferably, there are four elevation adjustment columns, with two elevation adjustment columns on each side of the foundation short pile, and a connecting column connecting the two elevation adjustment columns on the same side.

[0010] Preferably, the positioning plate has a casting hole in the middle.

[0011] The present invention has the following technical effects.

[0012] This utility model features centralized manufacturing, one-time molding, easy installation, high precision, and strong environmental friendliness. It also improves the accuracy of pre-embedded construction and the speed of on-site installation. Furthermore, it reduces the generation of on-site welding arc light. This saves construction time, improves green construction indicators, reduces environmental pollution, and increases economic benefits. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0015] Figure 2 This is a schematic cross-sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the anchor bolt cage and operating platform of this utility model.

[0017] Figure 4 This is a three-dimensional schematic diagram of the anchor bolt cage of this utility model.

[0018] Figure 5 This is a three-dimensional schematic diagram of the foundation short pile, foundation reinforcement, and elevation adjustment column of this utility model.

[0019] Figure 6 This is a flowchart illustrating the overall process flow when this utility model is used.

[0020] Figure label:

[0021] 1-Foundation short pile, 2-Foundation reinforcement, 3-External hoop reinforcement, 4-Elevation adjustment column, 5-Crossbeam, 6-Positioning plate, 7-Anchor bolt, 8-Lower nut, 9-Positioning reinforcement, 10-Reinforcing reinforcement, 11-Base plate, 12-Adjusting cylinder, 13-Adjusting screw, 14-Limiting plate, 15-Rotating handle, 16-Connecting column, 17-Pouring hole, 18-Operating platform, 19-Upper nut. Detailed Implementation

[0022] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The detailed description of the embodiments will make this clear. All references to the following embodiments are made with reference to the accompanying drawings.

[0023] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] This utility model is an integrated pre-embedded device for steel structure anchor bolts, mainly applicable to the pre-embedded installation of more than 4 anchor bolts per group in reinforced concrete column foundation steel structures. During manufacturing, this utility model uses tungsten inert gas welding instead of traditional manual arc welding to achieve factory-based, integrated production management. During manufacturing, the nodes are pre-arranged according to the design drawings and manufactured at a 1:1 scale.

[0025] The structure of this utility model mainly includes an operating platform 18, which primarily serves as a support structure and can be a steel pipe frame welded from multiple steel pipes. A positioning plate 6 is placed on the operating platform 18. Figure 3 As shown, the upper end of the operating platform 18 can also be two spaced steel pipes, with the positioning plate 6 placed on the two steel pipes. The lower end of the positioning plate 6 is empty, and multiple evenly distributed positioning holes are opened around the positioning plate 6. The positioning holes do not coincide with the width of the steel pipes. Anchor bolts 7 are inserted from bottom to top in the positioning holes. An upper nut 19 and a lower nut 8 are rotated on the anchor bolts 7. The upper nut 19 is placed at the upper end of the positioning plate 6, and the lower nut 8 is placed at the lower end of the positioning plate 6. After adjusting the anchor bolts 7 to a vertical state and the same height, two layers of positioning steel bars 9 are welded to the outside of the multiple anchor bolts 7. The welded anchor bolts 7 are called anchor bolt cages.

[0026] During installation, the foundation short pile 1 is prepared for installation. It is made of concrete. Vertically evenly distributed foundation steel bars 2 are reserved on the four sides of the upper end face of the foundation short pile 1. The foundation steel bars 2 are reserved and poured inside the foundation short pile 1. External hoop steel bars 3 are tied and welded to the outside of the foundation steel bars 2 around the perimeter.

[0027] Elevation adjustment columns 4 are fixed on both sides of the foundation short pile 1. There are two elevation adjustment columns 4 on each side, for a total of four. The lower ends of the two elevation adjustment columns 4 on the same side are connected by a connecting column 16. The elevation adjustment columns 4 are mainly used to stabilize, support and adjust the height. The specific structure includes a base plate 11, on which a vertical adjustment cylinder 12 is fixed. The adjustment cylinder 12 has a threaded hole, and an adjustment screw 13 is threaded into the threaded hole. A limit plate 14 is fixed at the top of the adjustment screw 13. A rotating handle 15 is fixed on the adjustment screw 13 to facilitate the rotation adjustment of the adjustment screw 13. A crossbeam 5 is clamped on the two horizontally corresponding elevation adjustment columns 4. There are a total of two crossbeams 5.

[0028] The anchor bolt cage and positioning plate 6 are placed inside the foundation reinforcement 2, and the crossbeam 5 passes through the middle of the anchor bolt cage. The positioning plate 6 is placed on the crossbeam 5. Then, reinforcing steel bars 10 are tied and welded between the anchor bolt cage and the foundation reinforcement 2. Concrete is then poured inside the foundation reinforcement 2. To facilitate concrete pouring, a pouring hole 17 is provided in the middle of the positioning plate 6.

[0029] The specific usage method is as follows:

[0030] Place the positioning plate 6 stably on the operating platform 18, put the lower nut 8 onto the anchor bolt 7, and insert multiple anchor bolts 7 sequentially from bottom to top into the positioning holes. Rotate the upper nut 19 sequentially onto the anchor bolts 7, and adjust the height of all anchor bolts 7 so that all anchor bolts 7 are at the same height. At this time, the anchor bolts 7 are naturally vertical. At the same time, the upper nut 19 rotates and abuts against the upper end face of the positioning plate 6, and the lower nut 8 is on the lower end face of the positioning plate 6, ensuring that the anchor bolts 7 are vertical and at the same height. After the anchor bolts 7 are positioned, use positioning steel bars 9 to weld together the upper and lower ends of the multiple anchor bolts 7 to form an anchor bolt cage, so that multiple anchor bolts 7 are connected together.

[0031] Then remove the upper nut 19, remove the positioning plate 6, and the anchor bolt 7 will automatically fall from the operating platform 18. Otherwise, the anchor bolt 7 cannot be removed. Then remove the connected anchor bolt cage from the operating platform 18 and take it to the construction site.

[0032] If operating platform 18 is selected Figure 3 In this way, since no steel pipe is inserted between multiple anchor bolts 7, the steel pipe will not affect the positioning reinforcement 9 when it is being removed, so there is no need to disassemble the positioning plate 6.

[0033] If the upper end of the operating platform 18 is structured like the crossbeam 5 and passes between the anchor bolts 7, then the positioning plate 6 needs to be removed; otherwise, the anchor bolt cage cannot be removed.

[0034] Foundation short piles 1 are poured at the construction site. When pouring foundation short piles 1, foundation steel bars 2 are poured on foundation short piles 1 in advance, and then outer hoop steel bars 3 are tied to the outside of foundation steel bars 2.

[0035] Four elevation adjustment columns 4 are fixed on both sides of the foundation short pile 1. The anchor bolt cage is placed inside the foundation steel bar 2. The crossbeam 5 is clamped on the limiting plate 14 and passes through the anchor bolt cage. The positioning plate 6 and the upper nut 19 are then installed on the anchor bolt cage again. The height of the elevation adjustment column 4 is adjusted. At this time, the positioning plate 6 is erected on the crossbeam 5.

[0036] A center line is drawn on the positioning plate 6, and the center line is consistent with the engineering positioning cross positioning axis of the actual anchor bolt 7 plane arrangement.

[0037] Then, the anchor bolt cage is tied to the foundation steel bar 2 and fixed by electric welding to complete the installation of the anchor bolt cage 7.

[0038] The formwork for the foundation column is closed, and concrete is poured through the pouring hole 17.

[0039] Remove the positioning plate 6 again, take away the crossbeam 5 and the elevation adjustment column 4, fix the base plate of the steel structure column onto the anchor bolts 7, and then carry out the subsequent structural installation.

[0040] The elevation adjustment column 4, crossbeam 5, and positioning plate 6 mentioned above can be reused, saving materials and allowing for repeated use.

[0041] The more specific construction process is as follows:

[0042] Overall construction of the base

[0043] 1. Make positioning plate 6: Positioning plate 6 is made of steel plate. The diameter and spacing of the positioning holes on positioning plate 6 are made with drilling equipment according to the design dimensions of anchor bolt 7 in the construction drawing at a 1:1 scale. Positioning plate 6 is fixed on operating platform 18.

[0044] 2. Insert each anchor bolt 7 freely into the positioning hole from bottom to top. Install fixing nuts on both the top and bottom of the positioning plate 6, with the upper nut 19 at the top and the lower nut 8 at the bottom, and fix the anchor bolt 7 to the platform of the positioning plate 6.

[0045] 3. Adjust the spacing error of the anchor bolts 7 by fixing the nuts to be within 1.5mm, the verticality error to be within 1.2mm, and the flatness error of the upper surface of the bolt group to be within 2mm.

[0046] 4. Using the pre-fabricated upper and lower fixing components, i.e., positioning steel bars 9, weld and assemble all the anchor bolts 7 together to form a fixed anchor bolt cage. See the image for the finished anchor bolt cage. Figure 4 .

[0047] 5. After the anchor bolt cage is welded, loosen the upper nut 19 and the lower nut 8 in sequence to allow the anchor bolt cage to fall off the operating platform 18 naturally.

[0048] 6. The anchor bolt cage that has fallen off can be pulled out from the bottom of the operating platform 18 and then loaded onto a vehicle for transport to the site for installation.

[0049] The outer hoop reinforcement of the foundation short pile 1 is tied.

[0050] The concrete for the foundation short pile 1 is poured in two stages. The first stage is poured to a height of 50-100mm from the bottom of the anchor bolts. After the concrete has set, the outer stirrups of the foundation column reinforcement 2 are tied.

[0051] Install anchor bolts.

[0052] The pre-embedded installation follows the construction sequence of first installing column reinforcement, then anchor bolts, then beam reinforcement, and finally installing formwork. Figure 1 This is a picture showing the completed installation of the anchor bolt cage.

[0053] Figure 1 In the process, a center line is drawn on the positioning plate 6. The positioning plate 6 can be made of wood or steel plate, but the surface of the plate must be flat. The center line drawn on the plate surface is consistent with the engineering positioning cross axis of the actual anchor bolt 7 plane layout. During the installation of the building axis anchor cage, laser projection or string line method can be used. During installation, simply align the cross center line on the positioning plate 6 with the axis to complete the horizontal positioning of the anchor cage.

[0054] Before installation, mark the elevation around the reinforcing bars of the foundation short pile 1. Place the anchor bolt cage on the crossbeam 5 of the elevation adjustment device.

[0055] Adjust the plane and elevation of the anchor bolts.

[0056] 1. Elevation positioning: First, place the anchor bolt cage on the elevation adjustment column 4. According to the elevation markings around the vertical reinforcement of the foundation short pile 1, adjust the positioning plate 6 to correspond to the elevation markings by adjusting the rotation handle 15 of the elevation adjustment column 4, and then level the positioning plate 6.

[0057] 2. Horizontal positioning: Stretch the cross axis of the building on the positioning plate 6, and then adjust the overall anchor bolt cage installed on the elevation adjustment column 4 so that the center line of the cross on the positioning plate 6 corresponds to the cross axis of the building at this location.

[0058] Welded to the reinforcing bars of the foundation short piles.

[0059] After verification, the foundation steel cage and positioning bars can be welded and fixed to complete the installation.

[0060] The stirrups inside the foundation short piles are tied.

[0061] After the anchor bolts 7 are installed and fixed in place by welding, the inner stirrups of the foundation short piles 1 are installed and tied. During the installation and tying of the inner stirrups, it is necessary to avoid disturbing the anchor bolts 7 that have been fixed.

[0062] Finished Product Protection

[0063] Protecting the threads of anchor bolts is a crucial factor in steel structure construction. After installation and acceptance, apply grease to the threads of the anchor bolts, tighten a nut at the end of the anchor bolt, and use a plastic protective cap to completely protect the exposed threads of the anchor bolts to prevent concrete contamination and rusting.

[0064] Column formwork installation

[0065] After re-measurement and verification, the foundation column formwork was closed according to the formwork support plan. During the formwork closure process, the construction management strictly followed the operating procedures to minimize disturbance to the anchor bolts.

[0066] Pouring concrete

[0067] After each process has passed self-inspection, it is submitted to the professional supervising engineer for acceptance, and technical instructions are given to the concrete workers. Concrete pouring then commences. During concrete pouring, ensure that the anchor bolts 7 do not shift or deviate.

[0068] Quality control measures

[0069] 1. The location and diameter of the positioning mold plate holes for anchor bolt 7 shall be strictly inspected in accordance with the "Code for Acceptance of Construction Quality of Steel Structures" GB50205 standard.

[0070] 2. Control of verticality during the fabrication of anchor bolt 7: Anchor bolt 7 is freely inserted from bottom to top through the positioning hole, and anchor bolt 7 must be perpendicular to the plane of positioning plate 6.

[0071] 3. The two opposite faces of the anchor bolt 7, which is integrally welded around the perimeter, must be on the same plane. If necessary, diagonal bracing can be added for fixing to ensure that the integral anchor bolt 7 is not deformed during storage, transportation, and installation.

[0072] 4. Technical expertise is paramount; specialized construction plans are developed. Installation workers are trained and pass examinations. Workers are ensured mastery of key installation components and critical details. Technical personnel provide technical briefings and on-site guidance. Quality acceptance strictly adheres to a three-tiered inspection system: self-inspection, mutual inspection, and specialized inspection.

[0073] 5. The elevation of anchor bolt 7 and its placement are key procedures for ensuring the installation of the steel structure. The surveying team provides full on-site support. The reference elevation of anchor bolt 7 must be marked at the four corners of the fixed vertical reinforcement of the foundation short pile 1 for easy measurement and use. The accuracy of the elevation is ensured through specialized inspection and re-measurement.

[0074] 6. The anchor bolt 7 axis positioning uses a thin rope with a crosshair stretched along the entire foundation axis to ensure the accuracy and consistency of the anchor bolts 7 along the entire axis. To prevent the stretched axis rope from being blown off by the wind due to its excessive length, positioning axis fixing components can be added appropriately in the middle. After alignment, the crosshair positioning lines on the mold plate of the overall anchor bolt 7 must be completely and accurately aligned with the crosshairs of the axis. The anchor bolt offset should be within 1.5mm.

[0075] 7. The threads of the anchor bolts are protected by wrapping them with plastic caps to prevent damage and contamination.

[0076] Safety measures

[0077] 1. The temporary on-site power supply used in this construction method shall be strictly implemented in accordance with the provisions of the "Safety Technical Specification for Temporary Power Supply at Construction Sites" (JGJ46). The welding machine adopts a three-level power distribution system and uses a TN-S grounding protection system, with one machine, one switch, one box, and one leakage protector to ensure the safety of construction power supply.

[0078] 2. The welding machine shall be protected by a secondary no-load protector. Welders shall be trained at level three and hold a valid special worker's operating certificate. Before starting work, a hot work permit approved by the project department must be obtained, and all fire-fighting equipment must be checked.

[0079] 3. Before starting work, provide safety training and technical briefings to workers. A dedicated safety officer will be on-site to supervise and inspect the work, ensuring multi-layered checks and that everyone is responsible for safety.

[0080] 4. When performing welding operations, you must wear canvas work clothes, canvas shoes, special gloves, and protective masks in accordance with relevant regulations.

[0081] 5. Welding operations should be supervised by a designated person, and a distance of no less than 10 meters should be maintained from surrounding oxygen, acetylene cylinders and flammable materials.

[0082] Environmental protection measures

[0083] Manual electric welding operations can generate high temperatures of 4000℃-6000℃ during arc discharge. While melting the welding rod and the workpiece, it produces a large amount of waste gas and dust such as iron oxide, manganese oxide, and silicon dioxide, which causes significant environmental pollution.

[0084] 1. The integral anchor bolt cage is centrally processed and manufactured in the factory using tungsten inert gas welding.

[0085] 2. Centralized production in the factory can eliminate the harm to the environment caused by arc light, toxic gases and fumes, and the emissions are purified by purifiers, reducing pollution to outdoor air.

[0086] 3. Clean up any leftover steel bars and welding rods on site promptly, ensuring that all materials are removed upon completion of the work.

[0087] Benefit Analysis

[0088] 1. Economic benefits

[0089] The prefabrication of anchor bolts as a single unit replaces the traditional on-site installation method. Prefabrication allows for the use of leftover materials as connectors, and centralized material cutting saves costs and reduces management expenses. On-site installation is simple, stable, and precise, preventing displacement caused by poor anchor bolt fixing and avoiding rework due to incorrect installation. It also saves labor in this process, allowing subsequent processes to be started earlier and project completion ahead of schedule. Finally, it reduces management costs and achieves economic benefits.

[0090] Taking an e-commerce logistics park as an example, each steel column is assembled and installed using 12 anchor bolts welded together as a whole, which saves 0.4 man-days. On average, each steel column using anchor bolts saves 1505.75 yuan in construction period management fees, 82.37 yuan in on-site costs, and 200.3 yuan in labor costs. The total savings are 1505.75 + 82.37 + 200.3 = 1788.42 yuan.

[0091] Social benefits

[0092] 1. Anchor bolts can be manufactured in a factory, which greatly reduces the radiation of arc light and the emission of waste smoke during on-site installation, thus benefiting environmental protection.

[0093] 2. This construction method implements on-site integrated pre-embedded positioning and installation technology and relative constraint connection technology for foundation short pile reinforcement, solving the quality problem of weld damage to foundation column reinforcement caused by single anchor bolts in the past. This ensures the integrity of the pre-embedded anchor bolts for large steel structures.

[0094] 3. This construction method achieves centralized, standardized, and factory-based fabrication of anchor bolts, which relatively improves on-site electrical safety management and fire safety management. It also represents an innovation in green technology construction on-site. This has earned praise and positive feedback from the construction unit and the supervision unit.

[0095] 4. The elevation adjustment column 4, crossbeam 5, and positioning plate 6 in this construction method can be reused, saving materials and allowing for repeated use.

[0096] This utility model has the following construction characteristics when implemented:

[0097] Technically reliable: The construction method using this utility model follows an integrated production and construction approach, minimizing on-site fabrication and processing. It employs factory-integrated production and direct on-site positioning and installation. Through the positioning plate 6 and operating platform 18, the pre-embedded steel structure anchor bolts 7 can be quickly and accurately positioned and welded. After welding, the anchor bolts 7 are installed as a whole and adjusted via the elevation adjustment column 4, then the anchor bolt cage is fixed to the foundation reinforcement 2. Field experiments have shown that construction becomes simpler and more reliable.

[0098] High degree of factory production: The anchor bolt assembly used in this utility model device, including the spacing and positioning of each anchor bolt, is all completed in the factory using standardized templates and specialized tools. The high degree of integration of the construction method facilitates the saving of social resources and improves construction efficiency.

[0099] Fast on-site construction speed: On-site construction only requires overall positioning and reinforcement of the prefabricated anchor cage in the factory, which improves the construction speed.

[0100] Material and energy saving: Because of the adoption of integrated factory production and the optimization of the construction sequence of related processes, material waste during processing and installation is reduced, as well as material waste caused by rework due to installation accuracy errors, thus saving materials; after optimizing the construction process, the on-site installation accuracy is greatly improved, which greatly reduces the probability of rework and saves energy consumption.

[0101] Environmental protection: Centralized production in the factory allows for the purification and emission of toxic fumes and gases generated by welding, and reduces arc light radiation, which is beneficial to environmental protection.

[0102] High construction precision: The entire structure is laid out according to the design drawings, and positioning is achieved using the cross axis of the template surface, effectively preventing anchor bolt misalignment. This ensures that the overall elevation surface of the anchor bolts is flat.

[0103] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be obvious to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. An integral pre-embedded device for anchor bolts in steel structures, characterized in that, The system includes an operating platform (18), on which a positioning plate (6) is placed. The positioning plate (6) has multiple evenly distributed positioning holes around its perimeter. Anchor bolts (7) are inserted into the positioning holes from bottom to top. A lower nut (8) and an upper nut (19) are installed on the anchor bolts (7) at the lower end of the positioning plate (6) and at the upper end of the positioning plate (6). The multiple anchor bolts (7) are connected by multiple positioning steel bars (9) to form an anchor bolt cage.

2. The integral pre-embedded device for steel structure anchor bolts according to claim 1, characterized in that, It also includes a foundation short pile (1), with multiple evenly distributed foundation steel bars (2) poured around the upper end face of the foundation short pile (1), and external hoop steel bars (3) fixed on the multiple foundation steel bars (2). Elevation adjustment columns (4) are placed on both sides of the foundation short pile (1), and a crossbeam (5) is placed on the elevation adjustment column (4). An anchor bolt cage placed inside the foundation steel bars (2) is placed on the crossbeam (5), and a reinforcing steel bar (10) is fixed between the anchor bolt cage and the foundation steel bars (2).

3. The integral pre-embedded device for steel structure anchor bolts according to claim 2, characterized in that, The elevation adjustment column (4) includes a base plate (11), an adjustment cylinder (12) is fixed on the base plate (11), an adjustment screw (13) is threadedly connected to the adjustment cylinder (12), a limit plate (14) is fixed at the top of the adjustment screw (13), and a rotating handle (15) is fixed on the adjustment screw (13).

4. The integral pre-embedded device for steel structure anchor bolts according to claim 2, characterized in that, There are four elevation adjustment columns (4). There are two elevation adjustment columns (4) on each side of the foundation short pile (1). The two elevation adjustment columns (4) on the same side are connected by a connecting column (16).

5. The integral pre-embedded device for steel structure anchor bolts according to claim 1, characterized in that, The positioning plate (6) has a casting hole (17) in the middle.

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