Limited field underground super-long swing column installation structure and construction method thereof

Abstract

The application discloses a limited field underground super-long rocking column installation structure and a construction method thereof, and the installation structure comprises a bottom steel structure body, a top steel structure body, a rocking column arranged between the bottom steel structure body and the top steel structure body, an arm support piece temporarily installed at a lower part of the rocking column and a connecting piece connected between a bottom part of the rocking column and the bottom steel structure body. The segmented arrangement of the rocking column body is favorable for guaranteeing the transportation and segmented disposal and installation of the super-long column body. The arm support piece is arranged in a permanent and temporary combined mode, an arm support unit is formed in two directions of the rocking column and at a small interval in the limited field underground, the stability of the installation process of the rocking column is met, the installation problem of the rocking column in a small site is solved, the arm support measure is convenient to remove and reuse, the investment of the low measure cost is realized, and the economy is good. The arrangement for limiting the axial movement during installation is favorable for guaranteeing the safety and accuracy of the installation.

Description

Technical Field

[0001] This invention relates to the field of sway column installation technology, and in particular to an ultra-long sway column installation structure and its construction method in limited spaces. Background Technology

[0002] Swing columns are commonly found in portal frame structures. To meet the needs of large-span and large-space designs, wind-resistant columns are often required in the edge frames. These wind-resistant columns are typically designed as swing columns with hinged ends. Swing columns are generally short columns, and the conventional installation method is to hoist them into place as a whole, using guy ropes or diagonal bracing to maintain stability. However, both guy rope and diagonal bracing methods require reinforcement in four directions on a large area outside the swing column to achieve stability. When faced with limited space, where four-directional reinforcement is not feasible, conventional construction methods are unsuitable. Furthermore, when swing columns are designed to be extra-long, specific design considerations are needed for installation and securing them within limited space. Summary of the Invention

[0003] This invention provides an installation structure and construction method for an ultra-long swaying column in a limited space, which solves the technical problems of segmented installation, auxiliary support and installation fixation in a limited space.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An underground ultra-long swaying column installation structure in a limited space, wherein the ultra-long swaying column is adjacent to the boundary of the construction site on one side and is adjacent to an existing road outside the boundary. The underground ultra-long swaying column installation structure in a limited space includes a bottom steel structure, a top steel structure, a swaying column set between the bottom steel structure and the top steel structure, a handrail support temporarily installed at the bottom of the swaying column, and a connector connecting the bottom of the swaying column and the bottom steel structure.

[0006] The handrail support includes two parallel handrail columns, a handrail crossbar vertically connected between the two handrail columns, a handrail connecting rod horizontally detachably connected between the handrail columns and the swing column, a handrail clamp connecting member connected to the extended end of the handrail connecting rod, and a handrail diagonal brace set between the handrail clamp connecting member and the handrail column.

[0007] The arm clamp connector is detachably connected to the swing column.

[0008] Furthermore, both the bottom steel structure and the top steel structure include steel beams and steel columns arranged in a frame, with the top and bottom points of the swaying column located at the intersection of the steel beams; a steel column is located below the intersection.

[0009] Furthermore, the rocking column includes a rocking column body, a column top connecting lug and a column top docking plate disposed at the top of the rocking column, a column bottom connecting lug and a column bottom docking plate disposed at the bottom of the rocking column, and a column base disposed below the column bottom docking plate.

[0010] The top lug of the column and the top connecting plate of the column are hinged together, and the top connecting plate of the column is fixed to the top steel structure; the bottom lug of the column and the bottom connecting plate of the column are hinged together, and the column base below the bottom connecting plate of the column is fixed to the bottom steel structure.

[0011] Furthermore, the rocking column includes a lower rocking column, an upper rocking column, and a column connecting plate connecting the lower rocking column and the upper rocking column. The lower rocking column and the upper rocking column are provided with ear plates at circumferential intervals at their docking points, and the column connecting plate is correspondingly connected between the upper and lower ear plates.

[0012] Furthermore, the top lug and bottom lug of the column are both provided in pairs and are respectively hinged to the top joint plate and the bottom joint plate at the middle gap.

[0013] A reinforcing diagonal brace is symmetrically arranged between the top of the upper swaying column and the top steel structure; a column stiffening rib is provided between the top butt plate of the column and the top of the upper swaying column.

[0014] A column stiffening rib is provided between the column base plate and the column base. The column base is cylindrical and fixedly connected to the intersection of the steel beams in the bottom steel structure.

[0015] Furthermore, the length of the arm support column is at least one-third of the length of the lower sway column, and a connecting steel plate is provided at the bottom of the arm support column. The connecting steel plate is fixedly connected to the steel beam on the side of the intersection of the steel beams.

[0016] Furthermore, the handrail crossbar and the handrail connecting rods on the two handrail columns are on the same horizontal plane and are arranged in an isosceles triangle, with a handrail clamp connecting member at the vertex; and the handrail crossbar, handrail connecting rod and handrail clamp connecting member are arranged at intervals on the handrail columns.

[0017] The handrail braces are arranged in a figure-eight shape and are spaced apart on the handrail columns.

[0018] Furthermore, the arm clamp connector includes two semi-circular clamp plates, a clamp connecting plate horizontally disposed outside one clamp plate and perpendicular to the clamp plate, and a clamp rib plate connecting the clamp plate and the clamp connecting plate.

[0019] The two clamping plates are arranged in a circular shape and fit over the swing column. The clamping plates are fitted with flanges at the joints and are detachably connected by bolts. Reinforcing ribs are provided between the flanges and the clamping plates.

[0020] The clamp connecting plate connects the clamp plate and the arm connecting rod.

[0021] Furthermore, the connecting parts are steel pipes or steel profiles, and the connecting parts are spaced apart and respectively connected between the steel beams around the intersection of the bottom end of the lower swing column and the steel beam.

[0022] Furthermore, the construction method for installing ultra-long swaying columns in confined underground spaces involves the following specific steps:

[0023] Step 1: Determine the segment positions of the lower and upper sway columns based on the designed sway column length, ensuring that the length of each segment meets the road transport length requirements. After segmentation, verify the overall load-bearing capacity of the assembled sway column using simulation software. Then, design the handrail support components based on the length of the lower sway column, and verify the entire installation process of the handrail support components and sway columns using simulation software. Calculate and analyze the self-weight, wind load, and maximum cantilever state to determine the specifications of the handrail support components if they meet the design requirements.

[0024] Step 2: When the segmented lower and upper swaying columns are transported to the construction site, they are handled separately. For the lower swaying column, it is placed on a jig and a handrail support is installed on the side away from the site boundary. After installation, it is hoisted. The lower swaying column is lifted from the top at 4 points, and two chain hoists are used to set auxiliary lifting points on the handrail support to ensure that it is hoisted vertically into place.

[0025] Step 3: During the hoisting and installation of the bottom of the lower sway column, the bottom connecting lug of the column is hinged to the bottom docking plate of the column. The bottom docking plate is fixedly connected to the column base, which is pre-installed on the intersection of the already constructed steel beams. The bottom of the support column is fixedly connected to the corresponding steel beam through the connecting steel plate. Then, the bottom side of the lower sway column is fixedly connected to the steel column head through the connector. The axial movement of the hinge is limited by the setting of the connector during hoisting and installation.

[0026] Step 4: For the hoisting of the upper swaying column, first install the top connecting lug and the top connecting plate of the column, and assemble and install the pre-reserved joint at the intersection of the top connecting plate and the steel beam; then connect the column reinforcing diagonal brace and the reinforcing rib plate. By setting the reinforcing diagonal brace and the fixing rod connected between the top connecting lug and the top steel beam, the axial movement at the hinge point of the limiter is limited during hoisting and installation, and then a connected whole is formed for unified hoisting.

[0027] Step 5: Four lifting points are set at the top of the upper swing column for hoisting, and it is connected to the lower swing column in the air. The column connection point is equipped with connecting lugs, and the upper and lower connecting lugs are connected by column connecting plates and the connection point is fixed with high-strength bolts.

[0028] Step Six: After all the rocker columns have been installed and the welding inspection has passed, the protective equipment will be removed. Starting from top to bottom, first remove the reinforcing diagonal braces and fixing rods at the top of the column, then remove the arm support components, and finally remove the connecting parts at the bottom of the column; this completes the construction of the ultra-long rocker column installation structure in a limited space.

[0029] The beneficial effects of this invention are reflected in:

[0030] This invention facilitates the transportation and separate installation of ultra-long columns by segmenting the swaying column. Through the use of arm supports, a combination of permanent and temporary supports is employed. In limited spaces, arm support units are formed only in two directions with small intervals, ensuring stability during swaying column installation. This solves the installation problem of swaying columns in confined spaces. Furthermore, the arm supports are easy to dismantle and reuse, resulting in low-cost implementation and good economic efficiency. Finally, the invention's axial movement restriction during installation ensures installation safety and precision.

[0031] Compared with conventional construction methods, this technology requires less work at height for operators and carries relatively lower safety risks. The construction process combines temporary auxiliary supports with permanent sway columns, improving quality control and structural safety during construction. Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of the invention may be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description

[0032] Figure 1 This is a completed construction drawing of an ultra-long swaying column installation structure in a limited space.

[0033] Figure 2 This is a schematic diagram of the column top node installation structure;

[0034] Figure 3 This is a schematic diagram of the column base node structure;

[0035] Figure 4 This is a schematic diagram of the connection structure at the joint of the columns;

[0036] Figure 5 This is a schematic diagram of the arm support component installation structure;

[0037] Figure 6 This is a partial schematic diagram of the arm support component installation structure;

[0038] Figure 7 This is a schematic diagram of the armrest clamp connection structure.

[0039] Reference numerals in the attached drawings: 1-Bottom steel structure, 2-Top steel structure, 3-Swing column, 31-Swing column body, 311-Lower swing column body, 312-Upper swing column body, 313-Column connecting plate, 32-Top connecting lug of column body, 33-Top connecting plate of column body, 34-Bottom connecting lug of column body, 35-Bottom connecting plate of column body, 36-Column base, 37-Column stiffening rib plate, 4-Handrail support, 41-Handrail upright, 42-Handrail crossbar, 43-Handrail connecting rod, 44-Handrail diagonal brace, 45-Handrail clamp connecting piece, 451-Clamp plate, 452-Clamp connecting plate, 453-Clamp rib plate, 5-Connecting piece. Detailed Implementation

[0040] Taking the construction of a science and technology innovation center as an example, the construction site is small, adjacent to a public road, and has a high-voltage power line to the north. The construction road cannot form a loop and is narrow. From the second floor to the roof of the main building, six full-height swaying columns 3 are distributed east-west, with their upper parts connected to the roof of the north hall of the main building. Both ends of the swaying columns 3 are hinged. The cross-section of the swaying columns 3 is P800×35, the length is approximately 27m, and the weight is approximately 21.9 tons. The installation height on the roof is nearly 35m, with an outward cantilever of 4m. 50% of the roof steel beams are over 18m long. This area involves a lot of high-altitude work, and controlling the stability of the swaying columns 3 during installation is very difficult.

[0041] like Figures 1 to 7 As shown, the underground ultra-long swaying column installation structure in a limited space includes a bottom steel structure 1, a top steel structure 2, a swaying column 3 set between the bottom steel structure 1 and the top steel structure 2, a handrail support 4 temporarily installed at the bottom of the swaying column 3, and a connector 5 connecting the bottom of the swaying column 3 and the bottom steel structure 1.

[0042] In this embodiment, both the bottom steel structure 1 and the top steel structure 2 include steel beams and steel columns arranged in a frame. The top and bottom points of the sway column 3 are located at the intersection of the steel beams; a steel column is provided below the intersection.

[0043] In this embodiment, the swaying column 3 includes a swaying column body 31, a column top connecting lug 32 and a column top connecting plate 33 disposed at the top of the swaying column 3, a column bottom connecting lug 34 and a column bottom connecting plate 35 disposed at the bottom of the swaying column 3, and a column base 36 disposed below the column bottom connecting plate 35; the column top connecting lug 32 and the column top connecting plate 33 are hinged together, and the column top connecting plate 33 is fixed to the top steel structure 2; the column bottom connecting lug 34 and the column bottom connecting plate 35 are hinged together, and the column base 36 below the column bottom connecting plate 35 is fixed to the bottom steel structure 1. The top of the swaying column 3 is equipped with a radial joint bearing, the lower part is connected to the first-floor structure, and the column base of the swaying column 3 is connected to the top of the first-floor column by a pin.

[0044] In this embodiment, the rocking column 31 includes a lower rocking column 311, an upper rocking column 312, and a column connecting plate 313 connecting the lower rocking column 311 and the upper rocking column 312. The lower rocking column 311 and the upper rocking column 312 are provided with ear plates circumferentially spaced at their joints, and the upper and lower ear plates are correspondingly connected to the column connecting plate 313. The column top connecting ear 32 and the column bottom connecting ear 34 are both provided in pairs and are respectively hinged to the column top connecting plate 33 and the column bottom connecting plate at the middle gap. A reinforcing diagonal bar is provided between the top of the upper rocking column 312 and the top steel structure 2, and they are symmetrically arranged. A column stiffening rib plate 37 is provided between the column top connecting plate 33 and the top of the upper rocking column 312. A column stiffening rib plate 37 is provided between the column bottom connecting plate and the column base 36. The column base 36 is cylindrical and fixedly connected to the intersection of the steel beams in the bottom steel structure 1.

[0045] In this embodiment, the arm support 4 includes two parallel arm columns 41, an arm crossbar 42 vertically connected between the two arm columns 41, an arm connecting rod 43 horizontally and detachably connected between the arm columns 41 and the rocker column 3, an arm clamp connector 545 connected to the extended end of the arm clamp connector 43, and an arm diagonal brace 44 disposed between the arm clamp connector 545 and the arm columns 41; the arm clamp connector 545 is detachably connected to the rocker column 3.

[0046] In this embodiment, the length of the arm support column 41 is at least one-third of the length of the downward swaying column 311. A connecting steel plate is provided at the bottom of the arm support column 41, and the connecting steel plate is fixedly connected to the steel beam on the side of the intersection point of the steel beams. The arm support crossbar 42 and the arm support connecting rods 43 on the two arm support columns 41 are on the same horizontal plane and are arranged in an isosceles triangle. An arm support clamp connector 545 is provided at the vertex. The arm support crossbar 42, arm support connecting rod 43 and arm support clamp connector 545 are arranged at intervals on the arm support column 41. The arm support diagonal brace 44 is arranged in a figure-eight shape and is arranged at intervals on the arm support column 41.

[0047] In this embodiment, the arm clamp connector 545 includes two semi-circular clamp plates 451, a clamp connecting plate 452 horizontally disposed outside one clamp plate 451 and perpendicular to the clamp plate 451, and a clamp rib plate 453 connecting the clamp plate 451 and the clamp connecting plate 452; the two clamp plates 451 are arranged in a circular shape and correspondingly fit the swing column 311; the clamp plates 451 are provided with flanges at the splice and are detachably connected by bolts; a reinforcing rib plate is provided between the flange and the clamp plate 451; the clamp connecting plate 452 connects the clamp plate 451 and the arm clamp rod 43.

[0048] In this embodiment, the connecting piece 5 is a steel pipe or a steel section. The connecting pieces 5 are spaced apart and connected to the steel beams around the intersection of the bottom end of the lower swing column 311 and the steel beam.

[0049] Combination Figures 1 to 7 As shown, the construction method for installing ultra-long swaying columns in confined spaces is as follows:

[0050] Step 1: Determine the segment positions of the lower sway column 311 and upper sway column 312 based on the designed length of the sway column 3, ensuring that the length of each segment meets the road transport length requirements. After segmentation, verify the overall load-bearing capacity of the assembled sway column 3 using simulation software. Then, design the handrail support 4 based on the length of the lower sway column 311, and perform simulation software to verify the entire installation process of the handrail support 4 and sway column 3. Calculate and analyze the self-weight, wind load, and maximum cantilever state to ensure compliance with design requirements and determine the specifications of the handrail support 4.

[0051] Step 2: When the segmented lower sway column 311 and upper sway column 312 are transported to the construction site, they are treated separately. For the lower sway column 3, it is placed on the jig and the arm support 4 is installed on the side away from the site boundary. After the installation is completed, it is hoisted.

[0052] During assembly, two steel pipe support columns 41 are installed 2m apart along the horizontal members of the corresponding structural members of the sway column 3. The support column 41 has a specification of P355×8 and is made of Q235B. The material specifications can be adjusted according to different construction simulation calculation results. At the same time, two steel pipes of support arm connecting rods 43 and one support arm crossbar 42 are horizontally connected to form a stable lattice structure. The support arm connecting rods 43 and the support arm crossbar 42 have a specification of P159×6 and are made of Q235B. The material specifications can be adjusted according to different construction simulation calculation results. The support arm connecting rods 43 are connected to the sway column 3 using support arm clamp connectors 545 to avoid damage to the sway column 3. Pre-embedded connecting steel plates are installed on the lower structural steel beam. Local support arm installation measures consider adding support arm diagonal braces 44 for reinforcement. Within the assembly site of the sway column 3, a tower crane or truck crane is used to assemble the sway column 3 and the arm support 4 into a lattice structure. The assembly jig uses H400×400×13×21 steel profiles, with 3 jigs per set. A 14mm thick steel plate is installed on the jig as a limiting measure.

[0053] For the lower sway column 311, a top-four-point lifting method is used, while two chain hoists are set up on the arm support 4 as auxiliary lifting points to ensure vertical positioning. Before lifting the sway column 3, temporary steel ladders and fall arrestors must be secured to the steel column.

[0054] Step 3: During the hoisting and installation of the bottom of the lower sway column 311, the bottom connecting lug 34 of the lower sway column 311 is hinged to the bottom connecting plate 35 of the column. The bottom connecting plate 35 is fixedly connected to the column base 36, which is pre-installed on the intersection of the steel beams that have already been constructed. The bottom of the support column 41 is fixedly connected to the corresponding steel beam through the connecting steel plate. Then, the bottom side of the lower sway column 311 is fixedly connected to the steel column head through the connector 5. The axial movement of the connector 5 at the hinge point is limited during hoisting and installation.

[0055] When hoisting the swing column 3, the lower swing column 311 needs to complete the rigid connection and fixation of the pin node connector 5 before the hook is lowered. The connector 5 is set with four diagonal braces and welded to the steel column head at the intersection of the first-floor steel beam. The connector 5 is made of P159×6 round pipe, material Q235B. The material specifications can also be adjusted according to different construction simulation calculation results.

[0056] Step 4: For the hoisting of the upper swaying column 312, first install the top connecting lug 32 and the top connecting plate 33 of the column, and assemble and install the pre-reserved joint at the intersection of the top connecting plate 33 and the steel beam; then connect the column reinforcing diagonal brace and the reinforcing rib plate. By setting the reinforcing diagonal brace and the fixing rod connected between the top connecting lug 32 of the column and the top steel beam, the axial movement at the hinge point of the limiter is limited during hoisting and installation, and then a connected whole is formed for unified hoisting.

[0057] The fixing rod uses P159×6 round tubes to fix the hinge joint, and at the same time, the connection of the reinforcing steel pipe is reinforced to prevent the radial joint bearing joint from deforming or misaligning during hoisting.

[0058] Step 5: The upper swing column 312 is hoisted by four lifting points at its top and connected to the lower swing column 311 in mid-air. The column connection point is provided with connecting lugs, and the upper and lower connecting lugs are connected by the column connecting plate 313 and the connection point is fixed with high-strength bolts.

[0059] Step Six: After all the rocking columns 3 have been installed and the welding inspection has passed, the protective equipment will be removed. From top to bottom, first remove the reinforcing diagonal brace and fixing rod at the top of the column, then remove the arm support 4, and then remove the connecting piece 5 at the bottom of the column; thus completing the construction of the ultra-long rocking column installation structure in the limited space.

[0060] The temporary measures for the sway column 3 can only be removed after all the connecting main rods and the sway column 3 have been installed and welded and passed inspection. The removal of the measures and tools can be carried out by using a truck crane and a boom lift. Flame cutting should be used for cutting. A 15mm tooling bracket should be left to avoid cutting the base material. Afterwards, the surface should be smoothed with an angle grinder and the joints should be touched up with paint.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A limited field underground super-long rocking column installation structure, characterized by, The ultra-long rocking column (3) is adjacent to the boundary of the construction land and the existing road outside the boundary, and the ultra-long rocking column installation structure in the limited field comprises a bottom steel structure (1), a top steel structure (2), a rocking column (3) arranged between the bottom steel structure (1) and the top steel structure (2), a support arm support (4) temporarily installed at the lower part of the rocking column (3), and a connecting piece (5) connected between the bottom of the rocking column (3) and the bottom steel structure (1); The support arm support (4) comprises two support arm upright columns (41) arranged in parallel, a support arm cross bar (42) connected vertically between the two support arm upright columns (41), a support arm connecting hoop rod (43) horizontally and detachably connected between the support arm upright column (41) and the rocking column (3), a support arm hoop connecting piece (45) connected to the extended end of the support arm connecting hoop rod (43), and a support arm inclined brace (44) arranged between the support arm hoop connecting piece (45) and the support arm upright column (41); The support arm hoop connecting piece (45) is detachably connected to the rocking column (3); The rocking column body (31) comprises a lower rocking column body (311), an upper rocking column body (312), and a column body connecting plate (313) connected between the lower rocking column body (311) and the upper rocking column body (312), and the lower rocking column body (311) and the upper rocking column body (312) are arranged in a ring shape at the joint and are spaced apart by ear plates, and the column body connecting plate (313) is connected correspondingly between the upper and lower ear plates; The support arm cross bar (42) and the support arm connecting hoop rod (43) on the two support arm upright columns (41) are arranged on the same horizontal plane and form an isosceles triangle, and the support arm hoop connecting piece (45) is arranged at the apex; and the support arm cross bar (42), the support arm connecting hoop rod (43), and the support arm hoop connecting piece (45) are arranged in a spaced manner on the support arm upright column (41); and the support arm inclined brace (44) is arranged in an eight-character shape and is arranged in a spaced manner on the support arm upright column (41).

2. A limited field underground super-long rocking column installation structure according to claim 1, characterized in that, The bottom steel structure (1) and the top steel structure (2) each comprise a steel beam and a steel column arranged in a frame, and the top point and the bottom point of the rocking column (3) are arranged at the intersection point of the steel beams; and a steel column is arranged below the intersection point.

3. A limited field underground super-long rocking column installation structure according to claim 2, characterized in that, The rocking column (3) comprises a rocking column body (31), a column top connecting ear (32) and a column top butt plate (33) arranged at the top end of the rocking column (3), a column bottom connecting ear (34) and a column bottom butt plate (35) arranged at the bottom end of the rocking column (3), and a column base (36) arranged below the column bottom butt plate (35); The column top connecting ear (32) and the column top butt plate (33) are hingedly connected, and the column top butt plate (33) is fixed on the top steel structure (2); the column bottom connecting ear (34) and the column bottom butt plate (35) are hingedly connected, and the column base (36) below the column bottom butt plate (35) is fixed on the bottom steel structure (1).

4. A limited field underground super-long rocking column installation structure according to claim 3, characterized in that, The column top connecting ear (32) and the column bottom connecting ear (34) are arranged in pairs and are hingedly connected to the column top butt plate (33) and the column bottom butt plate, respectively. The upper swing column (312) top and the top steel structure (2) are provided with reinforcing inclined rods and are symmetrically arranged; the column top butt joint plate (33) and the upper swing column (312) top are connected with the column stiffening rib plate (37); The column bottom butt joint plate and the column base (36) are provided with the column stiffening rib plate (37), and the column base (36) is cylindrically arranged and fixedly connected to the steel beam intersection point in the bottom steel structure (1).

5. A limited field underground super-long rocking column installation structure according to claim 4, characterized in that, The length of the arm supporting column (41) is at least one third of the length of the lower swing column (311), and the arm supporting column (41) is provided with a connecting steel plate fixedly connected to the steel beam on the side of the steel beam intersection point.

6. A limited field underground super-long rocking column installation structure according to claim 5, wherein The arm supporting hoop connecting piece (45) comprises two semicircular hoop plates (451), a hoop connecting plate (452) horizontally arranged outside one hoop plate (451) and perpendicular to the hoop plate (451), and a hoop rib plate (453) connected between the hoop plate (451) and the hoop connecting plate (452); The two hoop plates (451) are combined to form a circular ring and correspond to the lower swing column (311), and the joint of the hoop plates (451) is provided with a flange and is detachably connected by bolts; the flange and the hoop plate (451) are provided with a reinforcing rib plate; The hoop connecting plate (452) connects the hoop plate (451) and the arm supporting hoop rod (43).

7. A limited field underground super-long rocking column installation structure according to claim 6, wherein The connecting piece (5) is a steel pipe or a profile steel piece, and the connecting piece (5) is arranged at intervals and connected between the lower swing column (311) bottom end and the steel beams around the steel beam intersection point.

8. A method of constructing a limited field underground super-long rocking column installation structure according to claim 7, characterized in that, The specific steps are as follows: Step one, according to the design of the swing column (3) length, the segmented position of the lower swing column (311) and the upper swing column (312) is determined, wherein the length of each segment meets the road transportation length requirement; and whether the whole swing column (3) after splicing meets the design stress requirement is calculated by simulation software; then the arm supporting piece (4) is designed according to the length of the lower swing column (311), and the whole process of installing the arm supporting piece (4) and the swing column (3) is simulated by the simulation software, and the self weight, wind load and maximum cantilever state are calculated and analyzed, and the specification of the arm supporting piece (4) is determined when it meets the design requirement; Step two, when the segmented lower swing column (311) and upper swing column (312) are transported to the construction site, they are respectively disposed; the lower swing column (3) is placed on the jig, and the arm supporting piece (4) is installed on the side away from the boundary of the site; after installation, hoisting is carried out; the lower swing column (311) is hoisted by 4 points at the top, and 2 inverted chains are used by setting auxiliary lifting points on the arm supporting piece (4) to ensure vertical positioning during hoisting; Step three, when hoisting and installing the bottom of the lower swing column (311), the column bottom connecting lug (34) of the bottom of the lower swing column (311) is hingedly connected with the column bottom butt joint plate (35), wherein the column bottom butt joint plate (35) is fixedly connected to the column base (36) pre-installed on the intersection of the steel beam which has been constructed; the arm support column (41) bottom is fixedly connected with the corresponding steel beam through the connecting steel plate; then the bottom end side of the lower swing column (311) is fixedly connected with the steel column head through the connecting piece (5), and the axial movement of the hinge joint of the limiter is limited by the setting of the connecting piece (5) during hoisting and installation; Step four, for hoisting the upper swing column (312), first install the top column top connecting lug (32) and the column top butt joint plate (33), and assemble and install the column top butt joint plate (33) with the reserved joint of the intersection of the steel beam; then connect the column strengthening diagonal rod and the strengthening rib plate, limit the axial movement of the hinge joint of the limiter during hoisting and installation by the setting of the fixing rod connected between the column top connecting lug (32) and the top steel beam through the strengthening diagonal rod, and then form the connection whole for unified hoisting; Step five, four lifting points are arranged at the top of the upper swing column (312) for hoisting, and the lower swing column (311) in the air is connected, the connecting lug is arranged at the column butt joint, the column connecting plate (313) is connected between the upper and lower connecting lugs, and the connecting position is fixed by high-strength bolts; Step six, after the swing column (3) is completely installed and welded and the detection is qualified, the removal of the construction measures is carried out, the strengthening diagonal rod and the fixing rod at the top of the column are removed first from top to bottom, then the arm support piece (4) is removed, and then the connecting piece (5) at the bottom of the column is removed; thereby the construction of the limited field underground super-long swing column installation structure is completed.

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