A method of construction of a building support swing column

Abstract

This invention provides a construction method for a building support sway column, belonging to the field of building structure technology. The construction method includes the following steps: S01: fabricating the sway column, which includes a straight pipe section, a tapered pipe section, a lower support, and an upper support; S02: pre-connecting the sway column at the processing site, installing the lower support and the tapered pipe section together using a rotation damper, and splicing the tapered pipe section and the straight pipe section together; S03: hoisting the pre-connected sway column to the required position at the construction site, and fixing the sway column with temporary supports; S04: assembling and welding the upper support to the roof beam on the ground, hoisting it into position at a high altitude, and connecting and welding it to the tapered pipe section; S05: correcting the sway column, and removing the temporary supports after correction. This invention can effectively solve the problem of sway columns consuming lateral displacement energy to protect the building structure when the building is under stress, while also ensuring lateral stiffness.

Description

Technical Field

[0001] This invention belongs to the field of building structure technology, and more specifically, relates to a construction method for a building support sway column. Background Technology

[0002] Unlike low-rise or multi-story buildings, structural lateral displacement has become a key factor in the structural design of high-rise buildings. With increasing building height, the lateral deformation of the structure under horizontal loads increases rapidly, and the lateral displacement increases exponentially with height. In the structural design of high-rise buildings, not only is sufficient strength required, but also sufficient anti-collapse stiffness is necessary to ensure that the lateral displacement generated by the structure under horizontal loads is limited to a certain range. Lateral displacement is a critical issue for high-rise buildings. The main reasons for controlling structural lateral displacement are: excessive lateral displacement can cause psychological discomfort to people inside the building, and controlling structural lateral displacement is necessary to ensure the normal use of the building; excessive lateral displacement can cause cracks, deformation, and even damage to infill walls, architectural decorations, and service facilities such as elevator tracks; the degree of damage to a building caused by an earthquake mainly depends on the magnitude of structural lateral displacement. If the structural deformation capacity is insufficient to withstand the deformation requirements of the earthquake input energy, the structure will collapse.

[0003] Large high-rise buildings often use swaying columns. The stability of the swaying column itself depends on the lateral stiffness of the rigid frame. The internal forces acting on the swaying column will promote the instability of the rigid frame. However, the lateral stiffness of the swaying column is low, and the lateral stiffness of the column decreases significantly. In most cases, negative stiffness will appear. The appearance of negative stiffness can moderately prolong the natural period of the structure and reduce the dynamic effect of the structure, which is beneficial to the vibration reduction of the structure. However, the excessively low lateral stiffness will bring inconvenience to the later deformation control of the structure. The loss of lateral resistance will also have an adverse effect on the stability and collapse resistance of the building.

[0004] Chinese invention patent (application number: CN201911262619.9) with publication number CN111021529A discloses a prefabricated rocking column system with column end constraint rotation, including a column end rotation constraint device, a prefabricated rocking column body, and a rubber support; the prefabricated rocking column is composed of concrete and reinforcement; the column end rotation constraint device connects the prefabricated rocking column to the frame beam; a rubber support is provided at the joint between the prefabricated rocking column and the frame beam; one end of the column end rotation constraint device is prefabricated inside the frame beam, and the other end is wrapped around the outside of the prefabricated rocking column body; the column end rotation constraint device is composed of an inner steel plate and an outer FRP sheet.

[0005] The invention described above did not solve the problem of how the sway column can consume lateral displacement energy to protect the building structure while ensuring lateral stiffness when the building is under stress. Summary of the Invention

[0006] In view of this, the present invention provides a construction method for a building support sway column, which can effectively solve the problem of sway column consuming lateral displacement energy to protect the building structure when the building is under stress, while also ensuring lateral stiffness.

[0007] This invention is implemented as follows:

[0008] This invention provides a construction method for a building support sway column, comprising the following steps:

[0009] S01: Construct a rocking column, which includes a straight pipe section, a tapered pipe section, a lower support, and an upper support;

[0010] S02: Pre-connect at the processing site, install the lower support and the tapered pipe section together through a rotary damper, and splice the tapered pipe section and the straight pipe section together;

[0011] S03: Hoist the pre-connected sway column to the required position on the construction site, and use temporary supports to fix the sway column;

[0012] S04: Assemble and weld the upper support and roof beam on the ground, then hoist it into place at high altitude and connect it to the tapered pipe section for welding.

[0013] S05: Correct the sway column, and remove the temporary support after correction.

[0014] Based on the above technical solution, the construction method of the building support sway column of the present invention can be further improved as follows:

[0015] The rotary damper includes a housing with a hollow cylindrical cavity filled with a viscous fluid. A partition block protruding towards the cavity is affixed to the inner wall of the cavity, the partition block facing radially towards the housing. A rotor is rotatably connected inside the housing, the rotor including blades and a shaft. The shaft is fixed to the upper and lower end faces of the housing, the blades are symmetrically arranged on the shaft, and the shaft can rotate around the blades within the housing. When rotating, the outer surface of the shaft can conform to the inner surface of the partition block, the blades can conform to the inner wall of the housing, and the partition block has a flow gap for the viscous fluid to pass through.

[0016] A check device that can be limited to slide within the flow gap is installed therein. The check device is used to limit the rotation angle of the rotor within the housing. The check device is equipped with a rebound member, which is used to provide a reaction force of the rotation damper body to the check device.

[0017] The top of the housing opening has a sealing top, which is used to seal the viscous fluid inside the housing. The rotating shaft passes through the sealing top and is welded to the tapered tube section. The top end of the rotating shaft is rotatably connected to the lower support, and the bottom of the housing is fixedly connected to the lower support.

[0018] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the rotary damper can adjust the braking torque, so that the hinge of the lower support of the sway column has lateral stiffness, which increases the overall stability of the building support and plays an energy dissipation role under the action of the design earthquake and rare earthquake, thereby achieving a combination of rigidity and flexibility in seismic performance.

[0019] Specifically, the rebound element is installed at the lower ends of both sides of the check device.

[0020] Furthermore, the flow gap has a constriction at the opening, and the gap becomes smaller towards the opening; the check device is a columnar member with pyramidal ends, and the area at the widest point of the check device is larger than the area at the opening of the constriction; the rebound member includes an elastic member, and the elastic member is detachably installed on the top of the rebound member.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the anti-return device a columnar member with pyramidal ends, the anti-return device can limit the sliding within it, so that the rotational damping can have a certain rotational capacity in both rotational directions, giving the building a certain lateral displacement capacity when encountering vibrations within its bearing range, which can moderately extend the natural vibration period of the structure and prevent damage to the building's rigidity.

[0022] Furthermore, a sealing sleeve is provided on the outer layer of the rotating blade to seal the gap between the rotating blade and the inner surface of the cavity inside the housing.

[0023] The specific contents of step S01 include: tapered pipe section processing, straight pipe section processing, and painting;

[0024] The specific coating method is as follows: all components are sandblasted to remove rust, and the rust removal grade of the rust removal treatment is Sa2.5; taking the bottom surface of the sway column after the overall installation is completed as the reference, the sway column is sprayed with 75μm of epoxy zinc-rich primer for the first 5m and 125μm of epoxy micaceous iron oxide intermediate paint for the first 5m and above.

[0025] Furthermore, the specific method for processing the tapered tube section is as follows:

[0026] Step 1: Arrange the tapered tube sections according to the drawings and cut them using a CNC cutting machine;

[0027] Step 2: Use a hydraulic press to press the tapered tube section material according to the marked lines. Check the material with a template after each pressing to gradually shape the tapered tube section.

[0028] Step 3: Remove the excess material of the tapered tube section and bevele it with air. The bevel surface is flat, with an angle deviation of ±5° and a blunt edge of ±1mm.

[0029] Step 4: Use submerged arc welding to weld the longitudinal butt weld of the tapered pipe section workpiece;

[0030] Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld;

[0031] Step 6: Perform 100% UT testing on the longitudinal butt weld to achieve BII level qualification;

[0032] Step 7: Refine the tapered shape of the tapered tube section.

[0033] Furthermore, the specific method for processing the straight pipe section is as follows:

[0034] Step 1: Arrange the straight pipe materials reasonably according to the drawings, and use a CNC cutting machine to cut and cut the materials;

[0035] Step 2: Use a hydraulic press to press the straight tube material according to the marked lines. Check the material with a template after each pressing to gradually shape the straight tube workpiece.

[0036] Step 3: Remove the excess material from the straight tube workpiece;

[0037] Step 4: Use submerged arc welding to weld the longitudinal butt weld of the straight pipe workpiece;

[0038] Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld;

[0039] Step 6: Perform 100% UT testing on the longitudinal butt weld to achieve BII level qualification.

[0040] The specific steps of step S02 are as follows:

[0041] Step 1: Display the center line of the swaying column on the platform. Using the center line of the swaying column as a reference, display the edge line of the swaying column and use it to create a support.

[0042] The straight pipe section and the tapered pipe end are hoisted into the jig and fixed with shims. Then the lower support is placed on the jig, taking care to ensure the joints are flush.

[0043] Provided that the shaft plate hole of the lower support member is concentric with the connecting plate hole of the tapered pipe section and the axis of the straight pipe section, uniform positioning welding is performed along the circumferential direction;

[0044] Step 2: Install positioning lugs at the connection between the tapered pipe section and the straight pipe section, adjust the alignment position, and then spot weld; when welding the tapered pipe section and the straight pipe section together, stagger the longitudinal welds by at least 200mm;

[0045] Step 3: Connect the lower support to the tapered tube section.

[0046] In step S05, the temporary support is a Φ159×10 steel pipe support.

[0047] Wherein, the diameter and pipe opening roundness of the straight pipe section are D / 500 and do not exceed 5mm; the unevenness of the cylinder length direction of the straight pipe section is L / 500 and does not exceed 5mm; the dimensional deviation of the straight pipe section length direction is 0 to ±3mm; and the bevel angle deviation at the cut of the straight pipe section is 0 to ±5°.

[0048] Compared with existing technologies, the beneficial effects of the construction method for a building support sway column provided by this invention are as follows: This invention uses a rotary damper at the vertebral segment and the lower support. The rotary damper can adjust the braking torque, and the hinged joint of the lower support of the sway column has lateral stiffness, which increases the overall stability of the building support. It plays an energy dissipation role under the action of earthquakes and rare earthquakes, thereby achieving a combination of rigidity and flexibility in seismic performance. The rotary damper can have a certain rotational capacity in both rotational directions, which gives the building a certain lateral displacement capacity when it encounters vibrations within its bearing range. It can moderately prolong the natural vibration period of the structure and prevent damage to the building's rigidity. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 A flowchart of a construction method for a building support sway column provided by the present invention;

[0051] Figure 2 This is a schematic diagram illustrating a construction method for a building support sway column provided by the present invention;

[0052] Figure 3 This invention provides a schematic diagram of a rotation damper in a construction method for supporting a swaying column in a building.

[0053] Figure 4 An external schematic diagram of the rotation damper in the construction method of the building support sway column provided by the present invention;

[0054] Figure 5 A cross-sectional schematic diagram of the rotation damper in the construction method of the building support sway column provided by the present invention;

[0055] Figure 6 A top view of the rotation damper in the construction method of a building support sway column provided by the present invention;

[0056] The attached diagram lists the components represented by each number as follows:

[0057] 01. Housing; 011. Sealing top; 02. Separator block; 04. Rotor; 041. Rotating blade; 043. Rotating shaft; 05. Flow gap; 051. Closure; 06. Check valve; 07. Rebound component;

[0058] 071. Elastic component. Detailed Implementation

[0059] 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] 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.

[0061] 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.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] like Figure 1 The image shown is a first embodiment of a construction method for a building support sway column provided by the present invention. This embodiment includes the following steps:

[0065] S01: Construct a rocker column, which includes a straight pipe section, a tapered pipe section, a lower support, and an upper support;

[0066] S02: Pre-connect at the processing site, install the lower support and tapered pipe section together through the rotary damper, and splice the tapered pipe section and straight pipe section together;

[0067] S03: Hoist the pre-connected sway column to the required location on the construction site and use temporary supports to fix the sway column;

[0068] S04: Assemble and weld the upper support and roof beam on the ground, then hoist it into place at high altitude and connect it to the tapered pipe section for welding.

[0069] S05: Correct the sway column, and remove the temporary support after correction.

[0070] like Figure 1 The welding process of the rocker column is shown below:

[0071] The technical specifications of welding materials and equipment shall comply with current national standards. Devices for slag removal, heating, air gouging, grinding, electrode baking and insulation, and temperature measurement shall be complete and effective.

[0072] Welding electrodes should be dried in a high-temperature dry coal box. For low-ammonia briquettes, the drying process involves heating the electrodes to 360°C in the high-temperature box, holding them at that temperature for 1.5 hours, then cooling them to 110°C before transferring them to an insulated box for storage. When using, electrodes removed from the insulated box should be immediately placed in an insulated electrode container at 100-110°C and used within 2 hours. Any remaining electrodes must be dried before use, but the number of drying cycles should not exceed two.

[0073] The voltage of the welding machine should be normal, the wire rod should be firmly clamped and have reliable contact, the cable and welding clamp should be undamaged, the wire feeding mechanism should be able to feed wire evenly, and the air pipe should be free from air leakage or blockage.

[0074] The sway column can utilize a buckling-resistance energy-dissipating brace disclosed in Chinese Invention Patent Publication No. CN104947822B, which includes an energy-dissipating unit. The energy-dissipating unit comprises at least one first support plate, at least one second support plate, at least one third support plate, and at least one energy-dissipating column. The first and third support plates are located on opposite sides of the second support plate and are spaced apart from it. The energy-dissipating column penetrates the second support plate and is connected at both ends to the first and third support plates, respectively. The buckling-resistance energy-dissipating brace provided by this invention, when the first, second, and third support plates reciprocate under tension or compression, causes the energy-dissipating column to bend and deform repeatedly, thereby achieving the effect of energy dissipation and preventing the building structure from easily becoming unstable.

[0075] In the above technical solution, the rotary damper includes a housing 01, which has a hollow cylindrical cavity filled with a viscous fluid. A partition block 02 protruding into the cavity is attached to the inner wall of the cavity of the housing 01, and the partition block 02 faces the radial direction of the housing 01. A rotor 04 is rotatably connected inside the housing 01. The rotor 04 includes a blade 041 and a shaft 043. The shaft 043 is fixed on the upper and lower end faces of the housing 01. The blades 041 are symmetrically arranged on the shaft 043. The shaft 043 can rotate around the blades 041 inside the housing 01. When the shaft 043 rotates, its outer surface can fit against the inner side of the partition block 02. The blades 041 can fit against the inner wall of the housing 01. A flow gap 05 for the viscous fluid to pass through is provided on the partition block 02.

[0076] A check device 06 is installed in the flow gap 05, which can limit the sliding within it. The check device 06 is used to limit the rotation angle of the rotor 04 within the housing 01. The check device 06 is equipped with a rebound member 07, which is used to provide a reaction force to the rotation damper body on the check device 06.

[0077] The top of the opening of the housing 01 has a sealing top 011, which is used to seal the viscous fluid inside the housing 01. The rotating shaft 043 passes through the sealing top 011 and is welded to the tapered tube section. The top of the rotating shaft 043 is rotatably connected to the lower support, and the bottom of the housing 01 is fixedly connected to the lower support.

[0078] Furthermore, in the above technical solution, the flow gap 05 has a constriction 051 at the opening, and the gap of the constriction 051 becomes smaller towards the opening; the check device 06 is a columnar member with pyramidal ends, and the area of ​​the widest part of the check device 06 is larger than the area of ​​the opening of the constriction 051; the rebound member 07 includes an elastic member 071, and the elastic member 071 is detachably installed on the top of the rebound member 07.

[0079] like Figure 2-6As shown, when the building structure experiences lateral displacement due to force, the swaying column tends to rotate on the lower support, causing the rotating shaft 043 in the fixed rotation damper on the lower support to rotate. When the shaft 043 rotates, it forces the viscous fluid inside the casing 01 to be compressed against the partition block 02 at the direction of rotation of the blade 041. Since the flow gap 05 on the partition block 02 is the only channel through which the liquid can pass, according to Bernoulli's equation: Equations that reflect the relationship between parameters such as velocity and pressure in ideal fluid motion.

[0080] When an ideal barotropic fluid undergoes steady motion under the influence of potential body forces, the equations of motion (i.e., the Euler equations) are integrated along streamlines to express the conservation of mechanical energy of the fluid. It is named after the famous Swiss scientist Bernoulli, who proposed it in 1738. For an incompressible homogeneous fluid in a gravitational field, p, ρ, and v represent the fluid's pressure, density, and linear velocity, respectively; h is the vertical height; g is the acceleration due to gravity; and c is a constant.

[0081] The narrow flow gap 05 creates resistance to the passage of viscous fluid, which can help counteract the lateral tilt of the building. At the same time, the viscous fluid also pushes the check valve 06 to slide in the flow gap 05. When the check valve 06 is pushed to the closing point 051 of the flow gap 05, the end of the check valve 06 completely blocks the closing point 051, and the viscous fluid cannot pass through. When the vane 041 compresses the viscous fluid to the limit of the partition block 02 in the direction of rotation, the vane 041 will be unable to continue rotating. This is equivalent to the vane 041 locking the rotating shaft 043 integrated with it, thus preventing the building from tilting further and keeping the building's lateral tilt within a safe range.

[0082] Therefore, it can be seen that the lateral tilt limit of a building can be controlled by changing the length of the check valve 06 in the flow gap 05.

[0083] Furthermore, in the above technical solution, the outer layer of the blade 041 is fitted with a sealing sleeve to seal the gap between the blade 041 and the inner surface of the inner cavity of the housing 01.

[0084] In the above technical solution, step S01 specifically includes: tapered pipe section processing, straight pipe section processing, and painting;

[0085] The specific coating method is as follows: all components are sandblasted to remove rust, and the rust removal grade is Sa2.5. Taking the bottom surface of the sway column after the overall installation is completed as the reference, the sway column is sprayed with 75μm of epoxy zinc-rich primer for the first 5m and 125μm of epoxy micaceous iron oxide intermediate paint for the first 5m and the second 55μm and the third 55μm and the fourth 5m and the fifth 5m and the sixth 5m and the seventh 55μm and the eighth 5m and the ninth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the ninth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the ninth 5m and the tenth 5m and the tenth 5m and the tenth 5m and the ninth 5m and the tenth 5m and the tenth 5m and the ninth 5m and the tenth 5m and the 125μm and the tenth 5m and the ninth 5m and the 125μm and the tenth ...

[0086] Epoxy zinc-rich primer is a special coating composed of epoxy resin and zinc powder as the main raw materials, along with thickeners, fillers, additives, and solvents. It is mainly used for steel pipes, storage tanks, steel structures, containers, etc.

[0087] Epoxy micaceous iron oxide intermediate paint is a two-component system. Component one is formulated with epoxy resin, micaceous iron oxide, rust-preventive pigments, and organic solvents; component two is a curing agent. Component one:Component two = 100:10 (by weight).

[0088] Sa refers to sandblasting for rust removal, and both can be graded using colorimetric samples.

[0089] For specific classifications, please refer to relevant standards, such as GB18839 and GB 8923.

[0090] Blasting or shot blasting is designated by the letter Sa. For rust removal of steel surfaces using blasting or shot blasting, there are four grades:

[0091] Sa1 – Light blasting or shot blasting for rust removal. The steel surface should be free of visible grease and dirt, and free of loosely adhering scale, rust, and bare oil coatings.

[0092] Sa2 – Thorough blasting or shot blasting removes rust. The steel surface will be free of visible grease and dirt, and oxides, rust, and paint coatings will be largely removed. Any residue should be firmly adhered. Sa2.5 – Very thorough blasting or shot blasting removes rust. The steel surface will be free of visible grease, dirt, scale, rust, and paint coatings. Any remaining traces should be slight, dotted or streaked spots.

[0093] Sa3 – A blasting or shot blasting method that produces a clean appearance on steel.

[0094] For steel surfaces that have been rusted by hand and power tools, there are two rust removal grades.

[0095] St2 – Thorough rust removal by hand and power tools. The steel surface should be free of visible grease and dirt, and free of loose oxides, rust, paint coatings, or other contaminants.

[0096] St3 – A very thorough hand and power tool rust removal process, leaving the steel surface free of visible grease and dirt, and without any loose scale, rust, or paint coatings.

[0097] Furthermore, in the above technical solution, the specific method for processing the tapered tube section is as follows:

[0098] Step 1: Arrange the tapered tube sections according to the drawings and cut them using a CNC cutting machine;

[0099] Step 2: Use a hydraulic press to press the tapered tube section material according to the marked lines. Check the material with a template after each pressing to gradually shape the tapered tube section.

[0100] Step 3: Remove the excess material from the tapered tube section and bevel it with gas. The bevel surface should be flat, with an angle deviation of ±5° and a blunt edge of ±1mm.

[0101] Step 4: Use submerged arc welding to weld the longitudinal butt weld of the tapered pipe section workpiece;

[0102] Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld;

[0103] Step 6: Perform 100% UT flaw detection on the longitudinal butt welds to achieve BII level qualification;

[0104] Step 7: Refine the tapered shape of the conical tube section.

[0105] When cutting and preparing the material, divide it into 16 equal parts, and be sure to leave a margin at the joint.

[0106] Furthermore, in the above technical solution, the specific method for processing the straight pipe section is as follows:

[0107] Step 1: Arrange the straight pipe materials reasonably according to the drawings, and use a CNC cutting machine to cut and cut the materials;

[0108] Step 2: Use a hydraulic press to press the straight tube material according to the marked lines. Check the material with a template after each pressing to gradually shape the straight tube workpiece.

[0109] Step 3: Remove excess material from the straight pipe workpiece;

[0110] Step 4: Use submerged arc welding to weld the longitudinal butt joint of the straight pipe workpiece;

[0111] Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld;

[0112] Step 6: Perform 100% UT testing on the longitudinal butt welds to achieve BII level qualification.

[0113] The straight pipe section is a custom-made rolled steel pipe, and the following aspects were mainly controlled:

[0114] (1) The material of the straight pipe section of the swing column is 0345B, and the thickness can be 25mm or 35mm. There should be no delamination, slag inclusion or other defects at the steel end or break of the straight pipe section.

[0115] (2) According to the segmented dimensions of the drawings, provide an unfolded diagram. Each straight pipe segment is only allowed to have one longitudinal weld and is not allowed to be spliced ​​in the circumferential direction.

[0116] (3) The allowable deviation of air feeding is ±3mm, and the diagonal difference is not greater than 0.5L / 1000mm (L is the length of the diagonal) and ≤5mm;

[0117] (4) The bevel surface should be regular, clean and symmetrical. After the bevel is milled, clean the floating rust, oxide scale and other foreign matter in the area 20mm away from the edge of the bevel.

[0118] (5) When pre-bending, an inner circle template of the corresponding specifications should be prepared. The template should be used at any time to check the degree of bending of the steel pipe. The gap between the templates should not be greater than 2mm.

[0119] (6) The longitudinal weld joint is made by CO2 gas shielded welding for the root pass and submerged arc automatic welding for the cover pass;

[0120] During the welding process, pay attention to the control of the interpass temperature (not exceeding 250℃), and the interpass welds should be staggered (7). After the welding is completed, the longitudinal butt weld should be subjected to 100% UT flaw detection to achieve BII level qualification.

[0121] CO2 gas shielded welding uses a roller wire feeding mechanism to feed the welding wire through a nozzle, generating an electric arc between the welding wire and the base material to perform welding.

[0122] UT testing refers to ultrasonic testing, which is similar to ultrasound examination in hospitals. This method is used in industrial inspection to check for defects in pipe welds or internal defects in steel structures.

[0123] A hydraulic press (a type of hydraulic press) is a machine that uses specialized hydraulic oil as its working medium and a hydraulic pump as its power source. The pump forces the hydraulic oil through hydraulic lines into the cylinder / piston. Inside the cylinder / piston are several sets of mating seals, each with different features, all serving the purpose of sealing and preventing hydraulic oil leakage. Finally, a check valve circulates the hydraulic oil in the tank, causing the cylinder / piston to perform work and thus complete a specific mechanical action, thus contributing to productivity.

[0124] CNC cutting refers to a new control method where workpiece instructions (or programs) for controlling machine tools or equipment are given in digital form. When instructions are provided to the control device of a CNC automatic cutting machine, the machine can automatically cut according to the given program. CNC cutting technology is an organic combination of traditional machining processes with computer numerical control (CNC) technology, computer-aided design, and computer-aided manufacturing (CAD / CAM). CNC cutting consists of two main parts: the CNC system and the mechanical structure. Compared with traditional manual and semi-automatic cutting, CNC cutting, through the cutting technology, cutting process, and automatic control technology provided by the CNC system (controller), can effectively control and improve cutting quality and efficiency.

[0125] In the above technical solution, the specific steps of step S02 are as follows:

[0126] Step 1: Plot the center line of the swaying column on the platform. Using the center line of the swaying column as a reference, you can plot the edge line of the swaying column and use it to create the support.

[0127] Hoist the straight pipe section and the tapered pipe end into the jig, fix them with shims, and then place the lower support on the jig, paying attention to controlling the flatness of the joints;

[0128] Under the premise that the shaft plate hole of the lower support is concentric with the connecting plate hole of the tapered pipe section and the axis of the straight pipe section, uniform positioning welding is performed along the circumference;

[0129] Step 2: Install positioning lugs at the connection between the tapered pipe section and the straight pipe section, adjust the alignment position, and then spot weld; when welding the tapered pipe section and the straight pipe section together, stagger the longitudinal welds by at least 200mm.

[0130] Step 3: Connect the lower support to the tapered pipe section.

[0131] When assembling the entire rocker column, it is essential to ensure the perpendicularity of the lower support base to the rocker column axis. The deviation should be controlled within D / 500 and not exceed 3mm. The column length deviation should be controlled within 0 to ±3mm. The center lines of the straight pipe section and the tapered pipe section should be concentric.

[0132] In the above technical solution, the temporary support in step S05 is a Φ159×10 steel pipe support.

[0133] In the above technical solution, the diameter and pipe end roundness of the straight pipe section are D / 500 and do not exceed 5mm; the unevenness of the straight pipe section along the length of the cylinder is L / 500 and does not exceed 5mm; the dimensional deviation along the length of the straight pipe section is 0 to ±3mm; and the bevel angle deviation at the cut of the straight pipe section is 0 to ±5°.

[0134] The surface quality of the sway column should meet the requirements of GB50205-2001. The surface of the sway column should be free of obvious concavities and damage, and the depth of scratches should not exceed 0.5 mm and should not be greater than 1 / 2 of the thickness deviation of the sway column.

[0135] Specifically, the principle of this invention is as follows: When the building structure experiences lateral displacement due to force, the swaying column tends to rotate on the lower support, causing the rotating shaft 043 in the rotation damper fixed on the lower support to rotate. When the rotating shaft 043 rotates, it forces the viscous fluid inside the housing 01 to be squeezed against the partition block 02 at the direction of rotation of the rotating blade 041. Since the flow gap 05 on the partition block 02 is the only channel through which the liquid can pass, the narrow flow gap 05 creates resistance to the passage of the viscous fluid. This resistance can counteract the lateral tilt of the building; simultaneously, the viscous fluid... The viscous fluid also pushes the check device 06 to slide in the flow gap 05. When the check device 06 is pushed to the closing point 051 of the flow gap 05, the end of the check device 06 completely blocks the closing point 051. At this time, the viscous fluid cannot pass through. When the vane 041 compresses the viscous fluid to the limit of the partition block 02 in the direction of rotation, the vane 041 will be unable to continue to rotate. This is equivalent to the vane 041 locking the rotating shaft 043 integrated with it, so that the building cannot tilt further and the tilt of the building is controlled within a safe range.

[0136] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A construction method for supporting a swaying column in a building, characterized in that, Includes the following steps: S01: Construct a rocking column, which includes a straight pipe section, a tapered pipe section, a lower support, and an upper support; S02: Pre-connect at the processing site, install the lower support and the tapered pipe section together through a rotary damper, and splice the tapered pipe section and the straight pipe section together; S03: Hoist the pre-connected sway column to the required position on the construction site, and use temporary supports to fix the sway column; S04: Assemble and weld the upper support and roof beam on the ground, then hoist it into place at high altitude and connect it to the tapered pipe section for welding. S05: Correct the sway column, and remove the temporary support after correction; The rotary damper includes a housing (01) having a hollow cylindrical cavity filled with a viscous fluid; a partition block (02) protruding towards the cavity is affixed to the inner wall of the cavity of the housing (01), the partition block (02) facing radially toward the housing (01); a rotor (04) is rotatably connected inside the housing (01), the rotor (04) including a vane (041) and a shaft (043), the shaft (043) being fixed. On the upper and lower end faces of the housing (01), the blades (041) are symmetrically arranged on the shaft (043). The shaft (043) can rotate around the blades (041) inside the housing (01). When the shaft (043) rotates, its outer surface can fit against the inner side of the partition block (02). The blades (041) fit against the inner wall of the housing (01). The partition block (02) is provided with a flow slit (05) for the viscous fluid to pass through. A check device (06) that can be limited to slide within the flow gap (05) is installed therein. The check device (06) is used to limit the rotation angle of the rotor (04) within the housing (01). The check device (06) is equipped with a rebound member (07), which is used to give the rotation damper body a reaction force on the check device (06). The top of the opening of the housing (01) has a sealing top (011), which is used to seal the viscous fluid inside the housing (01). The rotating shaft (043) passes through the sealing top (011) and is welded to the tapered tube section. The top end of the rotating shaft (043) is rotatably connected to the lower support, and the bottom of the housing (01) is fixedly connected to the lower support. The flow gap (05) has a constriction (051) at the opening, and the gap (051) becomes smaller towards the opening; the check device (06) is a columnar member with pyramidal ends, and the area at the widest point of the check device (06) is larger than the area at the opening of the constriction (051); the rebound member (07) includes an elastic member (071), and the elastic member (071) is detachably installed on the top of the rebound member (07).

2. The construction method for a building support sway column according to claim 1, characterized in that, The outer layer of the blade (041) is fitted with a sealing sleeve to seal the gap between the blade (041) and the inner surface of the cavity inside the housing (01).

3. The construction method for a building support sway column according to claim 2, characterized in that, The specific contents of step S01 include: tapered pipe section processing, straight pipe section processing, and painting; The specific coating method is as follows: all components are sandblasted to remove rust, and the rust removal grade of the rust removal treatment is Sa2.5; taking the bottom surface of the sway column after the overall installation is completed as the reference, the sway column is sprayed with 75μm of epoxy zinc-rich primer for the first 5m and 125μm of epoxy micaceous iron oxide intermediate paint for the first 5m and above.

4. The construction method for a building support sway column according to claim 3, characterized in that, The specific method for machining the tapered tube section is as follows: Step 1: Arrange the tapered tube sections according to the drawings and cut them using a CNC cutting machine; Step 2: Use a hydraulic press to press the tapered tube section material according to the marked lines. Check the material with a template after each pressing to gradually shape the tapered tube section workpiece. Step 3: Remove the excess material of the tapered tube section and bevele it with air. The bevel surface is flat, with an angle deviation of ±5° and a blunt edge of ±1mm. Step 4: Use submerged arc welding to weld the longitudinal butt weld of the tapered pipe section workpiece; Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld; Step 6: Perform 100% UT testing on the longitudinal butt weld to achieve BII level qualification; Step 7: Refine the tapered shape of the tapered tube section.

5. A construction method for a building support swaying column according to claim 4, characterized in that, The specific method for processing the straight pipe section is as follows: Step 1: Arrange the straight pipe materials reasonably according to the drawings, and use a CNC cutting machine to cut and cut the materials; Step 2: Use a hydraulic press to press the straight tube material according to the marked lines. Check with a template after each pressing to gradually shape the straight tube workpiece. Step 3: Remove the excess material from the straight tube workpiece; Step 4: Use submerged arc welding to weld the longitudinal butt weld of the straight pipe workpiece; Step 5: Clean the surface of the longitudinal butt weld and stamp the welder's mark near the longitudinal butt weld; Step 6: Perform 100% UT testing on the longitudinal butt weld to achieve BII level qualification.

6. The construction method for a building support sway column according to claim 5, characterized in that, The specific steps of step S02 are as follows: Step 1: Display the center line of the swaying column on the platform. Using the center line of the swaying column as a reference, display the edge line of the swaying column and use it to create a support. The straight pipe section and the tapered pipe section are hoisted into the jig and fixed with shims. Then the support is placed on the jig, taking care to ensure the joints are flush. Provided that the shaft plate hole of the support member is concentric with the connecting plate hole of the tapered pipe section and the axis of the straight pipe section, uniform positioning welding is performed along the circumferential direction; Step 2: Install positioning lugs at the connection between the tapered pipe section and the straight pipe section, adjust the alignment position, and then spot weld; when welding the tapered pipe section and the straight pipe section together, stagger the longitudinal welds by at least 200mm; Step 3: Connect the lower support to the tapered tube section.

7. A construction method for a building support swaying column according to claim 6, characterized in that, The temporary support in step S05 is a Φ159×10 steel pipe support.

8. A construction method for a building support swaying column according to claim 7, characterized in that, The diameter and pipe opening roundness of the straight pipe section are D / 500 and do not exceed 5mm; the unevenness of the cylinder length direction of the straight pipe section is L / 500 and does not exceed 5mm; the dimensional deviation of the straight pipe section length direction is 0~±3mm; and the bevel angle deviation at the cut of the straight pipe section is 0~±5°.

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