Construction method for forward and reverse combination of hanging truss

Abstract

The invention discloses a forward and reverse combined construction method for a hanging truss, which realizes efficient installation of a steel truss beam and a hanging steel column through combination of a forward construction method and a reverse construction method. The sequential construction method is used for overall lifting of the steel truss girder, so that the high-altitude operation time is shortened, and the safety is improved; the reverse building method is used for installing the hanging steel columns and the steel beams layer by layer from top to bottom, and continuity and stability of the construction process are facilitated; in the welding stage of the steel truss girder, a supporting frame is erected at the ground projection position for segmented assembling and welding, and the integrity and precision of the steel truss girder are guaranteed; meanwhile, in the installation process of the hanging steel column, temporary supporting measures are taken as vertical supporting components, and the stability and safety of the structure are guaranteed; the translation device is mounted at the joint of the lower chord member and the inlaying layer steel column of the lower hanging steel suspender, so that accurate positioning and quick mounting of the inlaying layer steel column are realized, the construction process is simplified, the manual operation is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of steel structure engineering construction, and in particular to a construction method for combining forward and reverse hanging trusses. Background Art

[0002] In steel structure buildings, the suspended steel truss structure refers to a structure with multiple layers of hangers connected to the bottom of the large steel truss beams on the roof layer or upper floors. The hangers are made of welded steel columns. The bottom ends of the hangers on each layer are connected to each other through steel beams and laid with floor decking. The bottom end of the hanger on the bottom layer is suspended without support. The loads of the floor slabs and steel beams are transmitted to the steel trusses layer by layer through the hangers, and then transmitted to the building foundation through the vertical structures on both sides or one side of the steel trusses. Therefore, the hangers mainly bear vertical tensile stress. According to the tensile characteristics of the hangers, the installation method of this type of structure is generally to lift the top steel truss beam first, and then hoist the hangers layer by layer from top to bottom at the bottom of the steel truss. This is the forward construction method of the structure; the reverse construction method is to follow the installation order from bottom to top, first support the bottom of the hanger with a tire frame or temporary steel column, and then hoist the hangers and the steel beams and floor decking between the hangers layer by layer upward, and finally install the top steel truss in situ in a segmented or scattered manner. After the steel truss is completed, the bottom tire frame or temporary supporting steel column is removed.

[0003] When the suspended steel truss structure is installed by the forward method, the installation of the hangers on each layer, whether it is suspended welding and fixing after in-situ lifting or welding and connecting layer by layer during the lifting process of the steel truss, is much more difficult than that of the reverse method. When the reverse method is used, the installation of the hangers in the early stage is no different from that of ordinary steel columns. However, the top steel truss can only be lifted by super-large tower cranes due to its large size, heavy single-section components and high installation height. Moreover, the steel truss construction is in the later stage, which leads to the extended use time of the super-large tower crane and excessively high rental costs. In addition, during this process, the hangers are subjected to vertical pressure from the steel trusses, which changes its original force form and may cause adverse deformation of the hangers. Summary of the invention

[0004] In order to overcome the above-mentioned defects in the prior art, a construction method for combining forward and reverse directions of a hanging truss is provided.

[0005] The technical solution of the present invention is as follows: a construction method for combining forward and reverse suspension trusses, the construction method comprising: S1. Steel truss beam welding: set up a support frame at the ground projection position, assemble and weld the steel truss beam in sections, and install a translation device at the connection node between the lower chord and the embedded layer steel column of the lower hanging steel hanger; S2. Lifting of steel truss beams: The welded steel truss beams together with the translation device are lifted in situ as a whole by the sequential method. After being lifted to the designed height, they are fixed by welding to the reserved sections at both ends of the steel truss beams; S3. Temporary support setting: Temporary support measures are set up at the ground projection position of the steel hanger, using support frames or temporary steel columns as vertical support components and fixed on the ground; S4, installation of hanging steel columns: hoist the steel hanger to the top of the support frame and fix it, hoist the hanging steel beam and weld it to the steel hanger or the vertical structures on both sides, and then continuously install the steel hanger and hanging steel beam upwards in the form of reverse operation until the steel column of the embedded layer is installed; S5. Installation of the patching layer steel column: hoist the patching layer steel column from the ground into the translation device, move the sliding trolley on the sliding track, push the patching layer steel column to the designated position, temporarily fix it by connecting the ear plate, and then weld it; S6. Temporary support removal: After the upper and lower ends of the steel column of the patching layer are welded, the temporary support frame and translation device are removed; S7. Floor decking construction: Lay the floor decking on the suspended steel beams and pour the floor slab concrete layer by layer from top to bottom.

[0006] Preferably, the translation device includes a hanging steel frame, a sliding support and an operating platform; the sliding support is welded to the inner side of the hanging steel frame, and the operating platform is assembled at the bottom of the hanging steel frame for operators to perform translation, fixing and welding operations.

[0007] Preferably, the sliding support includes a sliding track, a limit block and a sliding trolley; the sliding track is located on the sliding support and is a track for the sliding trolley to travel; the limit blocks are located at both ends of the sliding track; the sliding trolley is used to support and move the steel columns of the embedded layer.

[0008] Preferably, the sliding trolley includes a pulley, a fixed groove and a fixed strut; the pulley is assembled at the bottom of the sliding trolley and is slidably connected to the sliding track; the fixed groove is used to fix the supporting corbel to prevent the steel column from shifting and falling off, and the fixed strut is used to fix the position of the sliding trolley.

[0009] Preferably, in S4, the steel hangers are first installed upwards and then the hanging steel beams are installed in a reverse order until the last layer of embedded steel columns is left.

[0010] Preferably, in S5, the connecting ear plate is welded to the steel plate with bolt holes at the connecting position of the steel hanger rods, and is used for temporary fixation between the steel hangers.

[0011] Preferably, supporting brackets are installed on both sides of the connecting ear plate, and the supporting brackets are used to place the steel hanger on the translation device for translation operation.

[0012] Preferably, in S5, the two sides of the embedded layer steel column with supporting corbels are aligned with the fixing grooves of the sliding trolley on the sliding support, and the steel column is slowly lowered until part of its weight is transferred to the hanging steel frame while keeping the steel column in a lifted state. After the sliding trolley is moved to push the steel column to the specified position, it is temporarily fixed by the connecting ear plates on the steel column, and then the steel column is welded and connected along the operating platform.

[0013] Preferably, in S6, after the temporary supporting frame and the translation device are removed, the stress of the entire steel truss hanging steel column structure is released.

[0014] Preferably, the operating platform is equipped with guardrails around it to protect the safety of operators.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The above construction method realizes the efficient installation of steel truss beams and hanging steel columns by combining the forward method and the reverse method; the forward method is used for the overall lifting of the steel truss beam, which reduces the time of high-altitude operations and improves safety; the reverse method is used for the installation of hanging steel columns and steel beams, which is carried out layer by layer from top to bottom, which is conducive to the continuity and stability of the construction process; during the welding stage of the steel truss beam, the integrity and accuracy of the steel truss beam are ensured by setting up support frames at the projection position on the ground for segmented assembly and welding. At the same time, during the installation of the hanging steel columns, temporary support measures are used as vertical support components to ensure the stability and safety of the structure; by installing a translation device at the connection node of the embedded layer steel column of the lower chord and the lower hanging steel hanger, the accurate positioning and rapid installation of the embedded layer steel column are achieved, which simplifies the construction process, reduces manual operations, and improves construction efficiency.

[0016] Furthermore, the translation device provides a stable support structure by hanging the steel frame, so that the steel columns of the patching layer can be accurately positioned at the designed position. The cooperation between the sliding support and the sliding trolley makes the movement of the steel columns fast and accurate, greatly improving the construction efficiency. The installation process of the steel columns of the patching layer is simplified. Traditional construction methods require a lot of manual handling and positioning, while the translation device greatly reduces manual intervention through mechanized operation, making the construction process smoother and more efficient. The use of the translation device can reduce the need for large-scale lifting equipment, thereby reducing construction costs. The precise positioning capability of the translation device ensures the installation accuracy of the steel columns of the patching layer and avoids construction quality problems caused by inaccurate positioning.

[0017] Furthermore, the sliding track provides a clear and stable walking path for the sliding trolley, ensuring the precise movement of the steel columns of the patching layer during installation. The sliding trolley moves smoothly along the track, allowing the steel columns to accurately reach the designated position, improving construction accuracy.

[0018] Furthermore, the pulley is assembled at the bottom of the sliding trolley and is slidably connected to the sliding track, ensuring the smooth movement of the trolley on the track, reducing the friction and resistance during the movement of the trolley, allowing the steel column to easily and accurately reach the designated position, improving the construction accuracy, and the fixing groove is used to fix the supporting bracket. Through the close fit of the fixing groove, the steel column can be effectively prevented from being displaced or falling off during the movement or installation process, ensuring the safety of the construction. The fixed support rod is used to fix the position of the sliding trolley to ensure that the trolley can remain stable after moving into place.

[0019] Furthermore, the steel hangers are installed first, and then the hanging steel beams are installed. This construction sequence is conducive to the layer-by-layer stability and support of the structure. With the layer-by-layer installation of steel hangers and hanging steel beams, the entire structural system is gradually improved, providing a stable support foundation for subsequent construction. Construction personnel are allowed to prefabricate and assemble steel hangers and hanging steel beams on the ground before working at high altitudes. This not only reduces the time of high-altitude operations, but also reduces the difficulty and risk of construction, thereby improving the overall construction efficiency. The steel hangers and hanging steel beams are installed upward layer by layer, so that each layer of the structure can be supported and fixed in time. This layer-by-layer reinforcement method enhances the stability of the entire structure and avoids safety accidents caused by structural instability.

[0020] Furthermore, the connecting lugs are welded to the steel plates with bolt holes at the connection parts of the steel hangers, which provides a convenient way for temporary fixation between the steel hangers. Through bolt connection, construction workers can quickly and accurately assemble the steel hangers together, greatly improving construction efficiency. During the hoisting and installation process, the connecting lugs can withstand a certain load to prevent the steel hangers from deformation or displacement due to uneven force.

[0021] Furthermore, the supporting brackets are installed on both sides of the connecting ear plate to provide additional support points for the steel hanger, thereby enhancing the stability of the steel hanger during installation and translation, and preventing deformation or displacement caused by uneven force.

[0022] Furthermore, in S5, the two sides of the steel column with supporting corbels in the patching layer are aligned with the fixing grooves of the sliding trolley on the sliding support. This precise alignment method ensures the stability and accuracy of the steel column during installation, avoiding installation difficulties and quality problems caused by misalignment. The lowering process of the steel column is carried out in steps, first slowly lowering it until part of its weight is transferred to the hanging steel frame. This step-by-step lowering method helps to control the lowering speed of the steel column and prevent structural vibration or damage caused by the sudden release of all weight. At the same time, the transfer of part of the weight to the hanging steel frame also provides a stable support foundation for subsequent movement and fixation.

[0023] Furthermore, after the temporary support frame and translation device are removed, the stress of the entire steel truss hanging steel column structure is released. This means that the structure is transformed from a temporary support state during the installation process to a fully stressed state, which helps to test and verify the stability and load-bearing capacity of the structure. After the temporary support frame and translation device are removed, the entire steel truss hanging steel column structure is exposed to the outside, which is convenient for construction workers to carry out maintenance and inspection work. This helps to promptly discover and deal with potential problems in the structure and ensure the safety and stability of the structure.

[0024] Furthermore, to ensure the safety of operators, guardrails are installed around the operating platform to provide operators with a safe working environment. It can effectively prevent operators from falling from the platform, avoid serious safety accidents, and ensure the smooth progress of the construction process; enhance the stability of the platform, resist external wind and other interference factors, and prevent the platform from shaking or tilting.

[0025] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 This is a schematic diagram of the forward and reverse combination construction of the present invention Figure 1 ; Figure 2 This is a schematic diagram of the forward and reverse combination construction of the present invention Figure 2 ; Figure 3 It is a structural schematic diagram of the translation device of the present invention; Figure 4 It is a structural schematic diagram of the sliding support of the present invention; Figure 5 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; The following are the descriptions of the reference numerals: Steel truss beam 1, steel hanger 2, embedded layer steel column 21, supporting corbel 211, connecting ear plate 22, hanging steel beam 3, supporting tire frame 4, translation device 5, hanging steel frame 51, sliding support 52, operating platform 53, guardrail 54, sliding track 521, limit block 522, sliding trolley 523, pulley 5231, fixing groove 5232, fixing strut 5233. DETAILED DESCRIPTION

[0027] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0028] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation of the present invention.

[0029] like Figures 1 to 5 As shown, a construction method of a hanging truss combined with forward and reverse methods mainly includes the following structures: a steel truss beam 1, a transverse steel member located at the upper part of the structure and bearing all the loads below it, is installed by an overall lifting method, and a 300mm long steel column connection section is reserved at the connection node of the hanging steel column; a steel hanger 2, a multi-layer steel column extending downward from the lower chord of the steel truss beam, and its bottom is suspended; an embedded layer steel column 21, a steel hanger located at the uppermost layer, and its steel column length is less than the net height of the floor; a supporting corbel 211, an embedded layer steel column 21 One is set on each side of the top connecting ear plate, which is used to place the steel hanger on the translation device for translation operation; the connecting ear plate 22 is a steel plate with bolt holes welded to the connecting part of the steel hanger, which is used for temporary fixation between the steel hangers; the hanging steel beam 3 is used for connection between the steel hangers and the steel hangers with other vertical structures, and the hanging steel beam is paved with a floor decking plate; the supporting tire frame 4 is located at the ground projection position of the steel hanger, which is used to support the steel hanger so that it can be installed layer by layer, and the height of the tire frame is from the ground to the lower surface of the steel beam at the bottom of the steel hanger.

[0030] The translation device 5 is installed at the connection node between the lower chord of the steel truss and the steel hanger, and is used to translate the patching layer steel column 21 to the specified position; the hanging steel frame 51 is the main frame structure of the translation device, and is installed on the connection node of the steel hanger before the steel truss beam is lifted as a whole; the sliding support 52 has a sliding support welded on both sides of the inner side of the hanging steel frame, which is mainly used to bear the weight of the patching layer steel column 21; the operating platform 53 is located at the bottom of the hanging steel frame and is used by the operator to translate, fix and weld the patching layer steel column 21; the guardrail 54 is a protective measure around the operating platform to ensure the operator's working safety.

[0031] The sliding support 52 includes a sliding track 521, a limit block 522 and a sliding trolley 523; the sliding track 521 is located on the sliding support 52 and is used as a track for the sliding trolley 523 to travel; the limit blocks 522 are located at both ends of the sliding track 521; the sliding trolley 523 is used to support and move the inlay layer steel column 21. Further, the sliding track 521 is located on the sliding support and is used as a track for the sliding trolley to travel; the limit blocks 522 are located at both ends of the sliding track to prevent the sliding trolley from going out of the sliding track; the sliding trolley 523 is used to support the movement and temporary fixation of the inlay layer steel column 21.

[0032] The sliding trolley 523 includes a pulley 5231, a fixing groove 5232 and a fixing strut 5233; the pulley 5231 is assembled at the bottom of the sliding trolley 523 and is slidably connected to the sliding track 521; the fixing groove 5232 is used to fix the supporting corbel 211 to prevent the steel column from shifting and falling off, and the fixing strut 5233 is used to fix the position of the sliding trolley 523. Furthermore, the pulley 5231 enables the sliding trolley to move along the direction of the sliding track; the fixing groove 5232 is used to support the placement of the corbel to prevent the steel column 21 of the patching layer from shifting and falling off during the translation process; the fixing strut 5233 is used to fix the position of the sliding trolley so that it does not move when the steel column is connected to the upper and lower components.

[0033] A construction method for combining forward and reverse hanging trusses comprises the following steps: S1, welding of steel truss beam 1: set up a support frame at the projection position on the ground, assemble and weld the steel truss beam 1 in sections, and install a translation device 5 at the connection node between the lower chord and the embedded layer steel column 21 of the lower hanging steel hanger 2; S2. Lifting of the steel truss beam 1: The welded steel truss beam 1 together with the translation device 5 are lifted in situ as a whole by a sequential method. After being lifted to the designed height, they are fixed by welding to the reserved sections at both ends of the steel truss beam 1; S3, temporary support setting: set up temporary support measures at the ground projection position of the steel hanger 2, use the support frame 4 or temporary steel column as the vertical support member, and fix it on the ground; S4, installation of hanging steel columns: hoist the steel hanger 2 to the top of the support frame 4 and fix it, hoist the hanging steel beam 3 and weld it to the steel hanger 2 or the vertical structures on both sides, and then continuously install the steel hanger 2 and the hanging steel beam 3 upwards in a reverse manner until the embedded layer steel column 21 is installed; S5, installation of the patching layer steel column 21: hoist the patching layer steel column 21 from the ground into the translation device 5, move the sliding trolley 523 on the sliding track 521, push the patching layer steel column 21 to the specified position, temporarily fix it by connecting the ear plate 22, and then weld it; S6, temporary support removal: after the upper and lower ends of the embedded layer steel column 21 are welded, the temporary support frame 4 and the translation device 5 are removed; S7. Floor decking construction: Lay the floor decking on the hanging steel beam 3, and pour the floor slab concrete layer by layer from top to bottom.

[0034] Further, in S4, the steel hangers 2 are first installed upwards, followed by the hanging steel beams 3, in reverse order, until the last layer of embedded steel columns 21 is left. In S5, the connecting ear plates 22 are welded to the steel plates with bolt holes at the connection parts of the steel hangers 2, and are used for temporary fixation between the steel hangers 2. Supporting brackets 211 are installed on both sides of the connecting ear plates 2, and the supporting brackets 211 are used to place the steel hangers 2 on the translation device 5 for translation operation.

[0035] In S5, the two sides of the patching layer steel column 21 with the supporting corbels 211 are aligned with the fixing grooves 5232 of the sliding trolley 523 on the sliding support 52, and the steel column is slowly lowered until part of its weight is transferred to the hanging steel frame 51 while keeping the steel column in a lifted state. After the sliding trolley 523 is moved to push the steel column to the specified position, it is temporarily fixed by the connecting ear plates 22 on the steel column, and then the steel column is welded and connected along the operating platform 53.

[0036] In S6, after the temporary support frame 4 and the translation device 5 are removed, the stress of the entire steel truss hanging steel column structure is released.

[0037] Specific construction steps: 1. Steel truss beam welding: according to the structural form of the steel truss beam 1, a support frame for truss segment assembly and welding is set up at its ground projection position. When the steel truss beam 1 is assembled, the height of its lower chord should meet the installation height requirement of the translation device 5; after the segment assembly and welding of the steel truss beam 1 is completed, the translation device 5 is installed at the connection node between the lower chord and the lower hanging steel column. First, the hanging steel frame 51 is welded at the node, and then the sliding support 52 is welded on the inner side of the hanging steel frame 51. The sliding track 521 and the limit block 522 on the sliding support 52 should be welded in advance, and the operating platform 53 and the corresponding guardrail 54 are welded at the bottom of the hanging steel frame 51.

[0038] 2. Lifting of steel truss beams: After the vertical structures and truss reserved sections on both sides of the steel truss hanging steel column structure are completed, the steel truss beam 1 is lifted as a whole in situ. When the steel truss beam 1 is lifted, the translation device 5 is lifted to the designed height together, and the two ends of the steel truss beam 1 are welded and fixed to the truss reserved sections on the vertical structures on both sides.

[0039] 3. Temporary support setting: temporary support measures are set up at the ground projection position of the steel hanger 2. The temporary support measures use support cradle 4 or temporary steel columns as vertical support components. The support cradle 4 or temporary steel columns are firmly fixed to the ground and reinforced with steel wire ropes or cable wind ropes around to prevent tilting and collapse.

[0040] 4. Installation of hanging steel columns: hoist the steel hanger 2 to the top of the supporting frame 4 and fix it, hoist the hanging steel beams 3 of the first layer one by one, weld them to the steel hanger 2 and the vertical structures on both sides, and after the installation of the hanging steel beams 3 of the first layer is completed, hoist the hanging steel beams 3 of the second layer, and then install the steel hanger 2 and the hanging steel beams 3 in reverse order, until the last layer of embedded steel columns 21 is left.

[0041] 5. Installation of embedded steel column 21: Put the steel columns in place: hoist the patching layer steel column 21 from the ground to the inner side of the hanging steel frame 51 of the translation device 5, place the sliding trolley 523 on the sliding track 521 of the sliding support 52 and push it to the outside first, lower the fixed strut 5233 to ensure that the sliding trolley 523 does not move, and then align the two side surfaces of the patching layer steel column 21 with the supporting corbels 211 with the two fixed grooves 5232 of the sliding trolley 523 on the sliding support 52 on this side, and slowly lower the steel column until part of its weight is transferred to the hanging steel frame 51, while keeping the steel column in a lifted state.

[0042] Translation of steel columns: Pull up the fixed struts 5233 at both ends of the sliding trolley 523, and slowly push the patched layer steel column 21 to the specified position by moving the sliding trolley 523, that is, just above the installed steel hanger 2, and then put down the fixed struts 5233 to fix the sliding trolley 523, and temporarily fix the connecting ear plate 22 at the upper end of the patched layer steel column 21 and the connecting ear plate 22 on the reserved steel column section at the lower chord of the steel truss beam 1 through high-strength bolts and steel plates with bolt holes. The same method is used to fix the connecting ear plate 22 at the lower end of the patched layer steel column 21 and the connecting ear plate 22 of the lower steel hanger 2.

[0043] Steel column fixed welding: welding workers weld and connect the top of the embedded layer steel column 21 along the operating platform 53, and weld the bottom of the steel column using the hanging steel beam 3 as a platform.

[0044] 6. Removal of temporary support: After the welding connection is completed at both ends of the embedded layer steel column 21, cut off the supporting bracket 211, remove the sliding trolley 523, cut the hanging steel frame 51, remove the entire translation device and hoist it to the ground. During this period, the temporary support frame 4 at the bottom of the hanging steel beam 2 is removed at the same time to release the stress of the entire steel truss hanging steel column structure.

[0045] 7. Floor decking construction: Lay the steel truss floor decking on the hanging steel beam 3, and pour the floor slab concrete layer by layer from top to bottom.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A construction method for combining forward and reverse suspension trusses, characterized in that: The construction method comprises: S1. Welding of steel truss beam (1): erecting a support frame at the projection position on the ground, assembling and welding the steel truss beam (1) in sections, and installing a translation device (5) at the connection node between the lower chord and the embedded layer steel column (21) of the lower hanging steel hanger (2); S2. Lifting of the steel truss beam (1): The welded steel truss beam (1) together with the translation device (5) is lifted in situ as a whole by a forward method. After being lifted to the designed height, the steel truss beam (1) is fixed by welding to the reserved sections at both ends of the steel truss beam (1); S3, temporary support setting: temporary support measures are set up at the ground projection position of the steel hanger (2), using a support frame (4) or a temporary steel column as a vertical support member and fixing it on the ground; S4, installation of hanging steel columns: hoisting the steel hanger (2) to the top of the supporting frame (4) and fixing it, hoisting the hanging steel beam (3) and welding it to the steel hanger (2) or the vertical structures on both sides, and then continuously installing the steel hanger (2) and the hanging steel beam (3) upwards in a reverse manner until the embedded layer steel column (21) is installed; S5, installing the patching layer steel column (21): hoisting the patching layer steel column (21) from the ground into the translation device (5), moving the patching layer steel column (21) on the sliding track (521) by the sliding trolley (523), pushing the patching layer steel column (21) to a specified position, temporarily fixing it by connecting the ear plate (22), and then welding it; S6, temporary support removal: after the upper and lower ends of the embedded layer steel column (21) are welded, the temporary support frame (4) and the translation device (5) are removed; S7. Floor decking construction: Lay the floor decking on the hanging steel beam (3) and pour the floor slab concrete layer by layer from top to bottom.

2. A construction method for combining forward and reverse suspension trusses according to claim 1, characterized in that: The translation device (5) comprises a hanging steel frame (51), a sliding support (52) and an operating platform (53); the sliding support (52) is welded to the inner side of the hanging steel frame (51), and the operating platform (53) is assembled at the bottom of the hanging steel frame (51) for an operator to perform translation, fixing and welding operations.

3. A construction method for combining forward and reverse suspension trusses according to claim 2, characterized in that: The sliding support (52) comprises a sliding track (521), a limit block (522) and a sliding trolley (523); the sliding track (521) is located on the sliding support (52) and is used as a track for the sliding trolley (523) to travel; the limit blocks (522) are located at both ends of the sliding track (521); and the sliding trolley (523) is used to support and move the embedded layer steel column (21).

4. A construction method for combining forward and reverse directions of a hanging truss according to claim 3, characterized in that: The sliding trolley (523) comprises a pulley (5231), a fixing groove (5232) and a fixing strut (5233); the pulley (5231) is assembled at the bottom of the sliding trolley (523) and is slidably connected to the sliding track (521); the fixing groove (5232) is used to fix the supporting corbel (211) to prevent the steel column from being displaced and falling off, and the fixing strut (5233) is used to fix the position of the sliding trolley (523).

5. The construction method of the hanging truss combined forward and reverse directions according to claim 1 is characterized in that: In S4, the steel suspension rods (2) are first installed upwards, followed by the hanging steel beams (3) in reverse order, until only the last layer of embedded steel columns (21) remains.

6. The construction method of the hanging truss combined forward and reverse directions according to claim 1 is characterized by: In the above S5, the connecting ear plate (22) is welded to the steel plate with bolt holes at the connection position of the steel hanger rod (2) and is used for temporary fixing between the steel hanger rods (2).

7. A construction method for combining forward and reverse directions of a hanging truss according to claim 1 or 6, characterized in that: Supporting brackets (211) are mounted on both sides of the connecting ear plate (22), and the supporting brackets (211) are used to place the steel suspension rod (2) on the translation device (5) for translation operation.

8. The construction method of the hanging truss combined forward and reverse directions according to claim 1 is characterized by: In S5, the two sides of the supporting corbels (211) of the inlay layer steel column (21) are aligned with the fixing grooves (5232) of the sliding trolley (523) on the sliding support (52), and the steel column is slowly lowered until part of its weight is transferred to the hanging steel frame (51), while the steel column is kept in a hoisted state, and after the sliding trolley (523) is moved to push the steel column to a specified position, it is temporarily fixed by the connecting ear plates (22) on the steel column, and then the steel column is welded and connected along the operating platform (53).

9. The construction method of the hanging truss combined forward and reverse directions according to claim 1 is characterized by: In S6, after the temporary support frame (4) and the translation device (5) are removed, the stress of the entire steel truss hanging steel column structure is released.

10. The construction method of the hanging truss combined forward and reverse directions according to claim 2, characterized in that: The operating platform (53) is equipped with guardrails (54) around its periphery for protecting the safety of operators during operation.

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