Construction method for diagonal steel reinforcement of large bearing platform and steel transfer beam

Abstract

The application provides a large bearing platform and steel conversion beam oblique steel bar split binding construction method, and relates to the technical field of construction. The large bearing platform and steel conversion beam oblique steel bar split binding construction method comprises the following steps: steel bar binding of a bearing platform body; steel bar binding of a conversion beam, and installation of a steel skeleton support at the beam bottom of the conversion beam, wherein, a steel bar penetrating hole for lateral steel bar penetration of the bearing platform is previously set on the web plate of the conversion beam; after a plurality of conversion beams are transported and transported to a working area, steel skeleton beam installation is performed, and two adjacent conversion beams are fixed by welding; longitudinal binding of the bearing platform body is performed, then bearing platform surface steel bars are inserted, and binding operation of the bearing platform surface steel bars is performed. The method ensures that the lateral steel bars of the bearing platform body can pass through the web plate of the conversion beam by leaving the steel bar penetrating hole on the web plate of the conversion beam, so that a closed and stable system of the bearing platform steel bar framework is formed. The process and technical procedure are advanced and convenient for construction, can accelerate the construction progress, and improve the engineering quality.

Description

Technical Field

[0001] This invention relates to the field of construction technology, and more specifically, to a method for separately binding the oblique reinforcing bars of a large foundation and a steel transfer beam. Background Technology

[0002] As a vital component of urban transportation, subways have seen continuous expansion in recent years. As part of the function and positioning of urban areas, the intersection or integration of subways with existing buildings has become a frequent issue in engineering design. Previously, when subways passed under existing buildings, appropriate reinforcement and protection were required based on the original building's structure and foundation. For older buildings and those relatively sensitive to soil deformation, subway tunneling presents significant challenges.

[0003] If the impact of subway tunnel boring machines (TBMs) crossing the subway can be fully considered during the building design process, and targeted technical measures can be taken during the foundation and pit engineering design, the adverse effects can be minimized. Due to the numerous advantages of steel structures, such as high strength, light weight, good seismic performance, and recyclability, steel structures are widely used in modern construction, especially in structures with large spans, high heights, and heavy loads. The advantages and roles of steel structures are significant in these cases, and many projects crossing subway lines use steel structures for transfer beams to meet the load transfer requirements of the superstructure.

[0004] However, the traditional rebar tying method cannot meet the construction requirements of the oblique intersection of the foundation and the steel beam. It has limitations in use and cannot guarantee the construction progress and project quality of the oblique intersection of the foundation and the steel beam. Summary of the Invention

[0005] The purpose of this invention is to provide a construction method for separately binding the oblique reinforcing bars of a large foundation and a steel transfer beam, which overcomes the shortcomings of the existing technology, improves the quality of the project, and accelerates the construction progress of the foundation body and the transfer beam.

[0006] The embodiments of the present invention are implemented as follows:

[0007] This application provides a method for separately binding the oblique reinforcing bars of a large foundation and a steel transfer beam, including the following steps:

[0008] Reinforcing steel bars are tied around the foundation.

[0009] The transfer beam is reinforced with steel bars and a steel support is installed at the bottom of the transfer beam. Through holes for the lateral reinforcement of the foundation are pre-set on the web of the transfer beam.

[0010] After transporting and transferring multiple conversion beams to the work area, the steel frame beams are installed, and adjacent conversion beams are fixed by welding.

[0011] The foundation body is longitudinally tied, then the foundation reinforcement is inserted, and the foundation reinforcement is tied.

[0012] The method of separately binding the oblique reinforcing bars of the large foundation and steel transfer beam involves leaving through holes in the web of the transfer beam to ensure that the lateral reinforcing bars of the foundation body can pass through the web of the transfer beam, thereby forming a closed and stable reinforcing bar skeleton of the foundation. This process is advanced, convenient to construct, and can speed up the construction progress and improve the quality of the project.

[0013] In some embodiments of the present invention, the step of reinforcing the transfer beam includes:

[0014] Multiple reinforcing steel shims are evenly spaced along both sides of the bottom of the transfer beam, and bottom supporting reinforcing bars for supporting the beam stirrups are placed on the multiple reinforcing steel shims respectively. Multiple diagonal stirrups are tied diagonally on the bottom supporting reinforcing bars.

[0015] The bottom reinforcement bars of the beam are hoisted in, and the first row of bottom reinforcement bars is tied based on the arrangement of multiple reinforcement shims. Then, the bottom diagonal reinforcement bars are placed, and the second row of bottom reinforcement bars and anti-torsion reinforcement bars are tied in sequence.

[0016] In some embodiments of the present invention, the step of installing steel support at the bottom of the transfer beam includes:

[0017] An upper square steel is installed at the bottom of the transfer beam, and lower square steel is welded to the bottom of both sides of the upper square steel. A positioning baffle for adjusting the bottom elevation of the beam is set on the top of the upper square steel.

[0018] In some embodiments of the present invention, the step of transporting and transferring the plurality of the transfer beams to the work area includes:

[0019] The conversion beam is transported on a flatbed truck by being secured with square straps, and friction-resistant parts are placed at the binding points of the square straps.

[0020] In some embodiments of the present invention, the step of installing the steel beam includes:

[0021] The two adjacent conversion beams are fixed at the same elevation using connecting plates. Once the elevations are consistent, they are welded together using a full penetration method with carbon dioxide gas shielded welding.

[0022] In some embodiments of the present invention, the step of binding the reinforcing bars of the foundation body includes:

[0023] Place a protective pad at the bottom of the foundation body, perform external hooping along the short diameter end of the foundation body, then tie the inner hoop and the bottom reinforcement of the foundation body, then pass the lateral reinforcement of the foundation through the reinforcement hole, then place the web reinforcement, and insert the top reinforcement of the foundation body.

[0024] In some embodiments of the present invention, the step of inserting the foundation rib into the foundation body includes:

[0025] Temporary fixing bars for steel bar arrangement are welded onto the studs. Then, the foundation reinforcement bars are arranged according to the preset spacing. The upper steel bar support is welded, and the foundation reinforcement bar ties are fixed to the upper steel bar support. Finally, the stirrups are bent manually.

[0026] In some embodiments of the present invention, after the step of inserting the foundation ribs into the foundation body, the method further includes:

[0027] Insert a haunch reinforcement bar, the end of which abuts against the web of the transfer beam, and then tie the abutment part.

[0028] In some embodiments of the present invention, the following steps are also included:

[0029] Multiple threaded sleeves are installed on the longitudinal reinforcement of the concrete column of the transfer beam and connected to the steel beam.

[0030] In some embodiments of the present invention, the step of connecting the longitudinal reinforcement of the concrete column of the transfer beam to the steel beam by setting multiple threaded sleeves includes:

[0031] Through BIM refinement, multiple threaded sleeves are adapted to the reinforcing nodes on the stiffening plate of the transfer beam.

[0032] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0033] 1) By leaving through holes in the web of the transfer beam, the lateral reinforcement of the foundation body can pass through the web of the transfer beam, thereby forming a closed and stable reinforcement cage for the foundation.

[0034] 2) Large-section steel bars are first processed with pre-drilled stirrups, and then bent into closed loops on site after the steel beam is hoisted to ensure the seismic performance of the concrete beam stirrups and improve the quality of the project;

[0035] 3) By using BIM to refine the design, the longitudinal reinforcement of the concrete columns on the conversion beams is connected to the steel beams through straight threaded sleeves. Stiffening plates are set at the corresponding positions of the sleeves to strengthen the nodes, which can solve the problem of a large number of steel bars in the node area, making the structure safer and more economical. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart of the construction method for separately binding the oblique reinforcing bars of a large foundation and steel transfer beam provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the transfer beam provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the steel frame support provided in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the initial arrangement of gluten provided in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of the gluten pre-cut noodles provided in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the stirrup-closed structure provided in an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the installation of the concrete cover device for the foundation reinforcement provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the installation of the transverse outer hoop of the foundation provided in an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the installation of the short outward hoop of the foundation provided in an embodiment of the present invention;

[0046] Figure 10 This is a schematic diagram of the installation of the transverse inner hoop of the foundation provided in an embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of the installation of the longitudinal bottom reinforcement bars of the foundation provided in an embodiment of the present invention;

[0048] Figure 12 This is a schematic diagram of the welding between the transverse outer hoop 2 of the foundation and the bottom connecting plate of the transfer beam, provided in an embodiment of the present invention.

[0049] Figure 13 This is a schematic diagram of the installation of longitudinal side reinforcement bars of the foundation provided in an embodiment of the present invention;

[0050] Figure 14This is a schematic diagram of the installation of longitudinal reinforcement bars on the foundation according to an embodiment of the present invention;

[0051] Figure 15 A schematic diagram of the welding between the transverse outer hoop and the top connecting plate provided in an embodiment of the present invention;

[0052] Figure 16 This is a schematic diagram of the structure of the first type of transverse outer hoop provided in an embodiment of the present invention;

[0053] Figure 17 This is a schematic diagram of the structure of the second type of transverse outer hoop provided in an embodiment of the present invention;

[0054] Figure 18 This is a schematic diagram of the third type of transverse outer hoop provided in an embodiment of the present invention;

[0055] Figure 19 This is a schematic diagram of the installation of the steel frame of the transfer beam provided in an embodiment of the present invention.

[0056] Icons: 101 - Upper rebar support; 102 - Lower rebar support; 103 - Foundation top reinforcement; 104 - Bent section stirrup; 111 - Bottom support reinforcement; 112 - Rebar pad; 113 - First row of bottom reinforcement; 114 - Second row of bottom reinforcement; 115 - Diagonal stirrup; 121 - Upper square steel; 122 - Lower square steel; 123 - Positioning baffle. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0059] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0060] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0061] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0062] Example

[0063] Please refer to Figures 1-19 This embodiment provides a method for separately binding the oblique reinforcing bars of a large foundation and a steel transfer beam, applicable to the foundation body and the transfer beam, which includes the following steps:

[0064] S100, Reinforcement binding of the foundation body.

[0065] In this embodiment, step S100 further includes step S101.

[0066] S101, place protective pads at the bottom of the foundation body, perform external hooping along the short diameter end of the foundation body, and then tie the inner hoop and the bottom reinforcement of the foundation body.

[0067] Among these methods, the steel reinforcement of the foundation body can be pre-tied to facilitate subsequent perforation and tying operations.

[0068] In some specific implementations of embodiments, such as Figures 7-11 As shown. The reinforcement binding of the foundation body can be divided into the following steps: installation of the foundation reinforcement protective layer device, installation of the foundation transverse outer hoop, installation of the foundation transverse inner hoop, and installation of the foundation longitudinal bottom reinforcement.

[0069] Among them, such as Figure 7As shown, three 40mm protective layer spacers are placed at both ends and the middle of the foundation longitudinally. A long longitudinal support steel bar with a diameter of 25mm is placed on each of the three protective layer spacers. The protective layer spacers and the support steel bar are tied together with fine tie wire to form a whole, which constitutes the protective layer device 1. Similarly, protective layer devices 2 and 3 are installed at the middle of the foundation transversely. Protective layer devices 1, 2 and 3 are welded together by three long transverse support steel bars with a diameter of 25mm to form a whole.

[0070] Among them, such as Figure 8 and 9 As shown. The transverse outer hoop of the pier cap includes three types: Type I transverse outer hoop 1 (e.g. Figure 16 As shown), the second type of transverse outer hoop 2 (as shown) Figure 17 As shown), the third type of transverse outer hoop 3 (as shown) Figure 18 (As shown); where: transverse outer hoop 1 is a closed hoop; transverse outer hoop 2 is an open hoop, consisting of a bottom transverse outer hoop 2-1 and a top transverse outer hoop 2-2; transverse outer hoop 3 is an open hoop, consisting of a bottom transverse outer hoop 3-1 and a top transverse outer hoop 3-2; when installing the transverse outer hoop of the foundation, according to the oblique angle and positional relationship between the foundation and the transfer beam, transverse outer hoop 1, transverse outer hoop 2, transverse outer hoop 3, transverse outer hoop 2, and transverse outer hoop 1 are installed sequentially along the longitudinal direction of the foundation according to the spacing of the transverse outer hoop; transverse outer hoop 1, transverse outer hoop 2, and transverse outer hoop 3 are tied and fixed to the bottom longitudinal support steel bars 1, 2, and 3 in the foundation reinforcement protective layer device using fine tie wire; the two sides of transverse outer hoop 1, transverse outer hoop 2, and transverse outer hoop 3 are tied and fixed with 12mm diameter lateral reinforcement steel bars 1 and 2 to form an integral placement to ensure uniform spacing of the transverse outer hoop. Among them, the lateral reinforcement steel bars 1 and 2 are tied to the outside of the transverse outer hoop.

[0071] S200 involves reinforcing the transfer beam with steel bars and installing steel supports at the bottom of the beam. Pre-cut through holes in the web of the transfer beam are made for the lateral reinforcement bars of the foundation.

[0072] Please refer to Figure 2 In this embodiment, step S200 further includes steps S201-S203.

[0073] S201, multiple steel reinforcement pads 112 are evenly spaced along both sides of the bottom of the transfer beam, and bottom support steel bars 111 for supporting the stirrups of the beam are placed on the multiple steel reinforcement pads 112 respectively, and multiple diagonal stirrups 115 are tied diagonally on the bottom support steel bars 111.

[0074] It is worth noting that in this embodiment, a row of 40mm steel reinforcement pads 112 can be placed on both the left and right sides of the bottom of the transfer beam at a spacing of 200mm. A 16mm diameter bottom support steel bar 111 is placed on the steel reinforcement pad 112 to support the beam stirrups. Stirrups are placed alternately at 100mm intervals, and 12mm steel bars are diagonally tied to the sides of the stirrups to fix the placed diagonal stirrups 115. Depending on the specific implementation environment, the diameter of the support beam stirrups can also be 14mm, 18mm, etc. By ensuring that the diameter of the bottom support steel bar 111 is larger than the diameter of the support beam stirrups, the overall structural stability of the transfer beam can be increased.

[0075] It can also be noted that step S201 may include the installation of the protective layer device for the transfer beam reinforcement, the binding of the stirrups at the opening of the transfer beam, and the binding of the bottom reinforcement and the binding of the anti-torsion reinforcement of the transfer beam.

[0076] The installation of the protective layer device for the transfer beam reinforcement includes placing three rows of 40mm protective layer spacers along both ends and the middle of the longitudinal direction of the transfer beam; each of the three rows of protective layer spacers is placed with a long longitudinal support steel bar with a diameter of 16mm; the protective layer spacers in each row are placed at a spacing of 200mm along the longitudinal direction of the transfer beam.

[0077] The binding of stirrups for the transfer beam openings includes binding stirrups according to the spacing in the design drawings; the bent sections of the stirrups should be staggered; and 12mm steel bars should be tied diagonally to the sides of the stirrups to fix them.

[0078] The process of binding the bottom reinforcement bars and anti-torsion bars of the transfer beam includes: after the open stirrups are bound, the first row of bottom reinforcement bars is hoisted into the transfer beam using a tower crane according to the number of bars in the first row; the bottom reinforcement bars are bound according to the spacing, and the first row of bottom reinforcement bars is hoisted in by the tower crane in sequence for splicing until the first row of bottom reinforcement bars is bound; the splicing of the first row of bottom reinforcement bars is done by straight thread; after the first row of reinforcement bars is bound, diagonal reinforcement bars are placed above the first row of bottom reinforcement bars, and then the second row of bottom reinforcement bars is bound according to the binding method of the first row of bottom reinforcement bars; the diagonal reinforcement bars between the first and second rows of bottom reinforcement bars are at an angle of 45°-60° to the first row of longitudinal bottom reinforcement bars; after the two rows of bottom reinforcement bars are bound, the anti-torsion bars are hoisted into the transfer beam using a tower crane; the lateral anti-torsion bars are installed from the bottom to the top of the transfer beam according to the number of bars in the design drawings, and the splicing of the lateral anti-torsion bars is also done by straight thread.

[0079] S202, hoist in the bottom reinforcement of the beam, and tie the first row of bottom reinforcement 113 based on the arrangement of multiple reinforcement pads 112. Then place the bottom diagonal reinforcement and tie the second row of bottom reinforcement 114 and anti-torsion reinforcement in sequence.

[0080] Specifically, after the stirrups are tied and fixed, the bottom reinforcement bars of the beam are hoisted in by a tower crane according to the number of the first row of bottom reinforcement bars 113. The bottom reinforcement bars are tied according to the spacing. The reinforcement bars are hoisted in a second time to extend until the bottom of the beam is completely tied. The bottom diagonal reinforcement bars are placed, the second row of bottom reinforcement bars 114 are tied, and then the anti-torsion reinforcement bars are tied.

[0081] Understandably, torsional reinforcement generally refers to steel bars placed on the sides of a frame beam when the loads on both sides are different, generating a certain torque on the beam. Here, torsional reinforcement is used to resist beam torsion and can also be used as stirrup reinforcement.

[0082] S203, an upper square steel 121 is installed at the bottom of the transfer beam, and lower square steel 122 is welded to the bottom of both sides of the upper square steel 121. A positioning baffle 123 for adjusting the bottom elevation of the beam is set on the top of the upper square steel 121.

[0083] It is worth noting that, such as Figure 3 As shown, after the bottom reinforcement is tied, the 200*100*5mm upper square steel 121 is precisely installed. The positioning baffle 123 is welded between the two upper square steel 121 to adjust the bottom elevation of the beam. The lower square steel 122 is welded to the left and right sides of the upper square steel 121 to restrict the movement of the steel column. The support is wider than the steel beam to enhance the stability of the steel beam.

[0084] It is also worth noting that by leaving through holes in the web of the transfer beam, it can be ensured that the lateral reinforcement of the foundation body can pass through the web of the transfer beam, thereby forming a closed and stable reinforcement cage for the foundation and improving the quality of the project.

[0085] It is also worth noting that in profiles, the side where flat steel, angle steel, bulb flat steel, and sheet are welded together is considered the web. This mainly refers to the side wall of the vertical slab or box girder below the flanges of the beam or slab beam connecting the upper and lower flanges, or the flange of a T-beam. The through-beam holes in the web of this transfer beam can resist shear force and also bear part of the bending moment.

[0086] After transporting and transferring multiple transfer beams to the work area, the steel frame beams are installed in the S300, with adjacent transfer beams fixed by welding.

[0087] In this embodiment, step S300 further includes steps S301-S303.

[0088] S301, the transfer beam is transported on a flatbed truck by being secured with square straps, and friction-resistant parts are placed at the strapping points of the square straps.

[0089] Specifically, a 17.5m long flatbed truck can be used for transportation. Three transfer beams are transported at a time, with the transfer beams secured by three square straps at the front, middle, and rear. Plastic bottles are placed at the strapping points of the steel beams to reduce friction and prevent damage to the square straps, ensuring a secure and stable connection. Depending on the specific implementation, if the slope of the ramp on site does not meet the preset requirements, and the components are heavy and have high inertia, directly lowering the flatbed truck to the bottom of the pit poses a significant safety risk. In such cases, a shorter flatbed truck can be used for transshipment.

[0090] In addition, depending on the weight of the components and the actual site conditions, a 130-ton truck crane can be used for relocation and hoisting, and another 130-ton truck crane can be used for the installation of the steel beams at the bottom of the foundation pit. A 13.5m flatbed truck can then be used to transport one steel beam to the foundation pit at a time.

[0091] S302, the truck crane lifting operation is carried out under warning, the foundation at the toe location is inspected to ensure that it is not on the backfill soil, the civil engineering work must not excavate the foundation of the lifting area, the lifting should be slow, and the beam positioning and elevation should be controlled by the coordinate points on the beam end pad and the square steel support.

[0092] S303, the elevation of two adjacent transfer beams is fixed by a connecting plate. After the elevation is consistent, the beams are fixed by full penetration welding with carbon dioxide gas shielded welding.

[0093] It is worth noting that welds on the steel beams are avoided on the same cross section and are staggered in a Z-shape to improve load-bearing capacity. After the steel structure welding is completed, ultrasonic non-destructive testing is used, and 100% of the first-level welds are inspected.

[0094] It is also worth noting that non-destructive testing (NDT) is a testing method that inspects the surface and internal quality of a component without damaging the workpiece or raw material. Ultrasonic testing has the advantages of detecting large thicknesses, high sensitivity, high speed, low cost, and is harmless to humans. It can also locate and quantify defects.

[0095] After step S303, as Figures 12-15 As shown, it may also include S400 for longitudinally binding the foundation body, then inserting the foundation reinforcement, and performing the binding operation of the foundation reinforcement.

[0096] The transverse outer hoop 2 of the foundation is welded to the bottom connecting plate of the transfer beam, the longitudinal side reinforcement of the foundation is installed, the longitudinal top reinforcement of the foundation is installed, and the top reinforcement of the transfer beam is installed.

[0097] The welding of the transverse outer hoop 2 of the pier cap to the bottom connecting plate of the transfer beam includes: after the transfer beam steel frame is hoisted, installed and inspected, the transverse outer hoop 2-1 of the pier cap is welded to the bottom connecting plate of the transfer beam; there are 2 bottom connecting plates of the transfer beam steel frame; the transverse outer hoop 2 is at 90° to the bottom connecting plate of the transfer beam; the welding of the bottom connecting plate of the transfer beam to the bottom of the transfer beam steel frame is completed in the processing plant; the two components of the transverse outer hoop 3, the transverse outer hoop 3-2 and the transverse outer hoop 3-1, are lap welded.

[0098] The installation of longitudinal side reinforcement of the pier cap includes the completion of steel structure weld inspection and welding of the transverse outer hoop 2 of the pier cap to the bottom connecting plate of the transfer beam. After the transverse outer hoop 3 is welded, the longitudinal reinforcement of the pier cap is installed. The longitudinal side reinforcement 2 of the pier cap within the height range of the transfer beam steel frame is manually inserted from the reserved holes in the transfer beam steel frame. The longitudinal side reinforcement 1 of the pier cap outside the height range of the transfer beam steel frame is inserted from the bottom of the transfer beam steel frame. The longitudinal side reinforcement 2 of the pier cap is connected by two ends and one mechanical connecting sleeve. When installing the longitudinal side reinforcement 2 of the pier cap, the first section is inserted first and then the second section is connected by mechanical connection and tightening. The mechanical connection of the longitudinal side reinforcement 2 of the pier cap on the same side should be staggered according to the specifications to avoid leaving joints in the same horizontal direction. Then the transverse horizontal tie bars of the pier cap and the web tie bars of the steel frame are installed.

[0099] The longitudinal reinforcement binding of the foundation includes: placing the longitudinal reinforcement of the foundation under the outer and inner lateral hoops of the foundation; binding the longitudinal reinforcement of the foundation with the outer and inner lateral hoops of the foundation using tie wire; the longitudinal reinforcement should be cut according to the longitudinal length of the foundation in the design drawings and positioned and arranged according to the spacing in the drawings; during construction, two people pass and install the foundation reinforcement one by one along the longitudinal direction of the foundation above the foundation.

[0100] Please refer to Figures 4-6 ,in, Figure 4 This is a schematic diagram of the initial arrangement of gluten provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the gluten pre-cut noodles provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the stirrup closure structure provided in an embodiment of the present invention.

[0101] S401, temporary fixing bars for steel bar arrangement are welded to the studs, and then the foundation reinforcement 103 is arranged on the lower reinforcement support 102 according to the preset spacing. The upper reinforcement support 101 is welded, and the foundation reinforcement 103 is fixed to the upper reinforcement support 101 with tie wire. Then, the stirrups are manually bent to form the bent section stirrup 104.

[0102] It is worth noting that for large-section steel bars, pre-fabricated stirrups are first processed, and then the steel beams are hoisted and bent into closed loops on site to ensure the seismic performance of the concrete beam stirrups.

[0103] In addition, the steps of tying the beam reinforcement and manually bending the open-type stirrups of the transfer beam may also include: welding a temporary fixing bar to the stud for reinforcement arrangement to prevent the reinforcement from falling between the studs, then adjusting the arrangement of the reinforcement according to the spacing, welding the upper layer reinforcement support, fixing the reinforcement ties to the upper layer support to prevent the reinforcement from deflecting too much, mechanically connecting and lengthening, and gradually manually bending the stirrups.

[0104] S402, insert haunch reinforcement bars, the ends of the haunch reinforcement bars abut against each other with the web of the transfer beam, and then tie the abutment part.

[0105] Haunch reinforcement refers to increasing the area of ​​two intersecting sections at the corner of the overall structure. It is generally made into a triangle and is cast at the same time as the intersecting structure. The haunch part should be appropriately equipped with structural reinforcement.

[0106] In S500, multiple threaded sleeves are installed on the longitudinal reinforcement of the concrete column of the transfer beam to connect with the steel beam.

[0107] It is worth noting that in step S500, BIM can be used to refine the design, adapting multiple threaded sleeves to the reinforcing nodes on the stiffening plates of the transfer beams. This solves the problem of a large number of reinforcing bars in the node area, making the structure safer and more economical. BIM-based detailed design refers to the supplementation and improvement of bidding drawings or original construction drawings during the project implementation process, making them feasible for on-site implementation. The advantage of using BIM technology for detailed design lies in the fact that traditional detailed design calculations are based on two-dimensional plans, which often differ significantly from the actual installed system, leading to inaccurate calculation results. Overestimating the parameters results in wasted construction costs and energy, while underestimating them causes the system to malfunction. Using BIM technology for detailed design offers clear advantages. A BIM model is a full-size, fully informative three-dimensional model of the entire building. The modeling process can uncover many hidden design problems and is also a comprehensive three-dimensional review process, improving project quality, accelerating construction progress, and offering significant economic, environmental, and social benefits, making it worthy of widespread application.

Claims

1. A construction method for diagonal steel reinforcement of a large pile cap and steel transfer beam split body binding, the construction method is applied to a pile cap body and a transfer beam, characterized in that, Includes the following steps: Reinforcing steel bars are tied around the foundation. The transfer beam is reinforced with steel bars and a steel support is installed at the bottom of the transfer beam. Through holes for the lateral reinforcement of the foundation are pre-set on the web of the transfer beam. After transporting and transferring multiple conversion beams to the work area, the steel frame beams are installed, and adjacent conversion beams are fixed by welding. The foundation body is longitudinally tied, then the foundation reinforcement is inserted, and the foundation reinforcement is tied. The steps for installing the steel beams include: using connecting plates to fix the elevation between two adjacent transfer beams, and then using carbon dioxide gas shielded welding with full penetration to weld and fix them after the elevations are consistent; The step of binding the reinforcing bars of the foundation body includes: placing a protective pad at the bottom of the foundation body, performing an outer hoop operation along the short diameter end of the foundation body, binding the inner hoop and binding the bottom reinforcing bars of the foundation body, then passing the lateral reinforcing bars of the foundation body through the reinforcing bar holes, then placing the web tie bars, and inserting the top reinforcing bars of the foundation body. The step of binding the reinforcing bars of the transfer beam includes: evenly spaced multiple reinforcing bar pads along both sides of the bottom of the transfer beam, and placing bottom support reinforcing bars for supporting the beam stirrups on the multiple reinforcing bar pads respectively; obliquely binding multiple diagonal stirrups on the bottom support reinforcing bars; hoisting in the bottom reinforcing bars of the beam, and binding the first row of bottom reinforcing bars of the beam based on the arrangement of the multiple reinforcing bar pads; then placing the bottom oblique reinforcing bars, and binding the second row of bottom reinforcing bars and anti-torsion bars in sequence.

2. The method according to claim 1, wherein The step of installing steel supports at the bottom of the transfer beam includes: An upper square steel is installed at the bottom of the transfer beam, and lower square steel is welded to the bottom of both sides of the upper square steel. A positioning baffle for adjusting the bottom elevation of the beam is set on the top of the upper square steel.

3. The construction method for separate binding of oblique reinforcing bars of large foundation and steel transfer beam according to claim 1, characterized in that, The step of transporting and transferring the multiple transfer beams to the work area includes: The conversion beam is transported on a flatbed truck by being secured with square straps, and friction-resistant parts are placed at the binding points of the square straps.

4. The construction method for separate binding of oblique reinforcing bars of large foundation and steel transfer beam according to claim 1, characterized in that, The step of inserting the foundation ribs into the foundation body includes: Temporary fixing bars for steel bar arrangement are welded onto the studs. Then, the foundation reinforcement bars are arranged according to the preset spacing. The upper steel bar support is welded, and the foundation reinforcement bar ties are fixed to the upper steel bar support. Finally, the stirrups are bent manually.

5. The construction method for separate binding of oblique reinforcing bars of large foundation and steel transfer beam according to claim 4, characterized in that, After the step of inserting the foundation reinforcement into the foundation body, the method further includes: Insert a haunch reinforcement bar, the end of which abuts against the web of the transfer beam, and then tie the abutment part.

6. The construction method for separate binding of oblique reinforcing bars of large foundation and steel transfer beam according to claim 1, characterized in that, It also includes the following steps: Multiple threaded sleeves are installed on the longitudinal reinforcement of the concrete column of the transfer beam and connected to the steel beam.

7. The construction method for separate binding of oblique reinforcing bars of large foundation and steel transfer beam according to claim 6, characterized in that, The step of connecting the longitudinal reinforcement of the concrete column of the transfer beam to the steel beam by setting multiple threaded sleeves includes: Through BIM refinement, multiple threaded sleeves are adapted to the reinforcing nodes on the stiffening plate of the transfer beam.

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