Folding construction method for full-pin-shaft connection hanging structure

Abstract

The invention discloses a folding type construction method for a full-pin-shaft connection hanging structure. The folding type construction method comprises the following steps that S1, surveying and setting out are conducted; s2, splicing the ground; a plurality of stand columns are sequentially spliced through pin shafts in the length direction, a vertical frame beam and an inclined steel beam are connected to the first section of stand column, and the first section of stand column, the vertical frame beam and the inclined steel beam form a right triangle; s3, mounting a carrying pole truss girder; s4, folding type lifting is carried out; s5, correcting and welding the cable-stayed section; s6, releasing the hook; and S7, overall correction welding is conducted. The fireproof door has the beneficial effects that a large number of high-altitude assembly procedures can be achieved, high-altitude operation of operators is greatly reduced, fireproof paint is sprayed in advance, the high-altitude operation risk is avoided, and the measure cost is saved; the hoisting equipment is used for assisting the hoisting structure in overall folding, overturning and hoisting, so that the working efficiency is greatly improved, and meanwhile, the safety risk is reduced.

Description

Technical Field

[0001] The invention relates to the field of steel structures, and in particular to a folding construction method for a fully pin-connected hanging structure. Background Art

[0002] At present, sightseeing elevators with full pin-shaft connection and suspension structure are rarely used. Since the pin-shaft connection is an ideal hinge, the rod installation process needs to consider the rotation and stability of the pin-shaft, which causes certain difficulties for on-site installation. In the existing technology, tasks involving high-altitude operations are often required. The elevator components (such as elevator shafts, equipment, pins, etc.) need to be hoisted to different floors or structural positions of the building by cranes or other lifting equipment. These positions are often high, possibly between floors or on the top of the elevator shaft. During installation, a large amount of installation work needs to be performed at high altitude, and the overall safety factor is low.

[0003] In comparison, the Chinese utility model patent with publication number CN215444669U discloses an elevator steel frame structure hoisting device, comprising: a first steel frame structure, a second steel frame structure and a locking piece; the first steel frame structure comprises a plurality of first connecting columns, the first connecting column is provided with at least one first connecting piece and a lifting ear, the first connecting piece is close to one end of the first connecting column, and the lifting rope or the lifting device can lift the first steel frame structure through the lifting ear; the second steel frame structure is placed above the first steel frame structure, the second steel frame structure comprises a plurality of second connecting columns, the second connecting columns correspond one-to-one to the first connecting columns, the second connecting column is provided with a second connecting piece, the second connecting piece corresponds to the first connecting piece, and the first connecting piece and the second connecting piece are fixedly connected by a locking piece.

[0004] In the above structure, the steel frame structure in the elevator is installed in sections. When installing the car on each floor, lifting equipment is still required to provide support for the steel frame structure, and the lifting equipment shakes when lifting the steel frame structure, that is, a large amount of high-altitude operations need to be carried out when the steel frame structure on each floor is unstable, which has low safety. Moreover, during the entire elevator installation process, the lifting equipment has been in use, the overall efficiency is low, and it is difficult to arrange the lifting equipment flexibly.

[0005] Therefore, providing a folding construction method for a fully pin-connected hanging structure is an issue worthy of study. Summary of the invention

[0006] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to complete the high-altitude assembly process on the ground, which greatly improves work efficiency and reduces safety risks.

[0007] The object of the present invention is achieved in that: The present invention provides a folding construction method of a full pin-connected hanging structure, comprising the following steps: S1: Measurement and setting out: A horizontal reference line is set on each cable-stayed floor, and one or more stakeout reference lines are set every n meters as the longitudinal reference; S2: Ground assembly: On the ground, multiple columns are spliced ​​in sequence along the length direction by pins, and the vertical frame beam and the oblique steel beam are connected to the first section of columns. The first section of columns, the vertical frame beam and the oblique steel beam form a right triangle, wherein the vertical frame beam is located at the movable end of the column and is arranged perpendicular to the column, and a shoulder pole truss beam is arranged on the vertical frame beam; A transverse steel beam is rotatably connected to the column, and a steel wire rope is tied to the movable end of each transverse steel beam. The movable end of the steel wire rope is connected to the upper vertical pole or the oblique steel beam or the vertical frame beam according to the installation position of the transverse steel beam after lifting; S3: Installation of shoulder pole truss beam: The lifting points and platforms are set on the shoulder pole truss beam; S4: Folding lifting: Use the lifting equipment to hoist the lifting point, so that the multiple columns are lifted section by section corresponding to the longitudinal reference until the last column is off the ground; S5: Correction welding of the inclined section: Lift the two ends a# and c# of the inclined steel beam vertically by 5-10mm, leaving the height of the b# end unchanged, and position the two ends of the inclined steel beam according to the floor reference line and then weld and fix them; S6: Loose Hook: After all the connecting joints of the oblique steel beams are welded, the lifting points are hoisted by lifting equipment to dismantle the shoulder pole truss beams; S7: Overall correction welding: Use the c# endpoint as the base point to make the vertical reference, make the d# endpoint correspond to the vertical reference, and fix the transverse steel beam.

[0008] In a preferred embodiment, in step S1, n is 20-50m.

[0009] In a preferred embodiment, in step S2, when the columns are connected, cylindrical members are supported at the bottom of the columns.

[0010] In a preferred embodiment, in step S2, wooden planks are used to cushion the lower part of the column during assembly, and the outer wall of the column is wrapped with a flexible fireproof cushion during assembly.

[0011] In a preferred embodiment, in step S2, when the steel wire rope is tied, each end is connected with no less than 3 U-bolt snap-fit ​​connections.

[0012] In a preferred embodiment, in step S2, there are multiple groups of columns, and transverse connecting beams are connected between the multiple groups of columns.

[0013] In a preferred embodiment, the movable ends of the steel cables on the transverse steel beams are connected to the vertical frame beams.

[0014] In a preferred embodiment, in step S2, a lifting lug is welded to the upper portion of the shoulder pole truss beam, and the lower portion is connected to the vertical steel beam via an "X" connector.

[0015] In a preferred embodiment, in step S3, a connecting hole corresponding to the "X" connecting piece is provided on the shoulder pole truss beam, and the connecting hole is an oblong hole.

[0016] In a preferred embodiment, in step S4, when each column is lifted to a vertical state, the column, transverse steel beam and wire rope are checked for abnormalities and then the lifting is continued. Positive beneficial effects: (1) The present invention can complete the high-altitude assembly process on the ground. The overall structure only needs to be connected to the embedded structure at high altitude. After the top pole structure is fixed, it can assist in supporting the poles of the lower layer. During operation, the overall structure is more stable, which greatly improves work efficiency and reduces safety risks.

[0017] (2) The construction method of the present invention can easily flip component units at a height of more than 20m on the ground. Through the folding lifting method, the structure can be lifted section by section, greatly shortening the construction period.

[0018] (3) The present invention allows the fire retardant coating to be sprayed in advance, thereby avoiding the risk of high-altitude operations and saving measures costs.

[0019] (4) The present invention adopts the method of horizontal assembly on the ground, which improves the installation quality and accuracy of the structure and greatly ensures safety.

[0020] (5) The present invention can be interspersed with construction. After being assembled in advance, the lifting equipment can be reasonably arranged within the specified time, avoiding the overlap with other professions. The whole lifting method is novel, safe and fast, while reducing the idle time of the lifting equipment and optimizing the resource allocation and construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the implementation process of the present invention; Figure 2 It is a schematic diagram of the installation of the neutral pole, the shoulder pole truss beam and the oblique steel beam assembled on the ground in the present invention; Figure 3 It is a schematic diagram of the installation of the transverse steel beam in the ground assembly of the present invention; Figure 4It is a schematic diagram of the installation of the steel wire rope in the ground assembly of the present invention; Figure 5 It is a schematic diagram of the installation of the hoisting wire in the ground assembly of the present invention; Figure 6 It is a structural schematic diagram of the shoulder pole truss beam of the present invention; Figure 7 It is a hoisting schematic diagram of the present invention; Figure 8 It is a schematic diagram of the fixed point of the present invention; The reference numerals in the accompanying drawings are explained as follows: vertical pole 1, transverse steel beam 2, oblique steel beam 3, vertical steel beam 4, shoulder pole truss beam 5, pin shaft 6, steel wire rope 7, lifting steel wire 8, ground 9. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figure 1-Figure 8 As shown, the present invention provides a folding construction method for a full pin 6 connection hanging structure, comprising the following steps: S1: Measurement and setting out: Review the steel structure measurement control network, measure and set the detailed axis and make reference to the axis of civil engineering survey and set to ensure the unity of the axis used by the two disciplines; Re-measure the deviation and elevation position of installed embedded parts to form data to provide a basis for elevator installation; Set a horizontal reference line on each cable-stayed floor in advance, and set one or more stakeout reference lines every n meters as the longitudinal reference; Where n is 20-50m, preferably 50m, and 0.9mm steel wire is used for the layout reference line.

[0024] S2: Ground assembly: When selecting the assembly site, the assembly site should be within the coverage of the tower crane, and the normal traffic on the construction road should not be affected during assembly. A site of appropriate size should be selected based on the length and width of the assembly. The site should be flat horizontally and can be sloped or have partial height differences vertically. When there is a height difference, a fulcrum needs to be set at the node rotation position. At the same time, the assembly site must also reserve walking space for tools such as forklifts.

[0025] See also Figure 2-Figure 3 As shown, on the ground 9, multiple columns are spliced ​​in sequence along the length direction using pins 6. When the columns are spliced, the bottom surface can be padded with wood, and fire-retardant coating can be sprayed before splicing, and the columns can be wrapped with flexible fire-retardant pads to prevent the coating from being damaged during the assembly process; A vertical frame beam and an oblique steel beam 3 are connected to the first section of the column. The first section of the column, the vertical frame beam and the oblique steel beam 3 form a right triangle, wherein the vertical frame beam is located at the movable end of the column and is arranged perpendicular to the column, and a shoulder pole truss beam 5 is arranged on the vertical frame beam; A transverse steel beam 2 is rotatably connected to the column, and a steel wire rope 7 is tied to the movable end of each transverse steel beam 2. The movable end of the steel wire rope 7 is connected to the upper vertical pole 1 or the oblique steel beam 3 or the vertical frame beam according to the installation position of the transverse steel beam 2 after lifting; When connecting the columns, vertical beams, oblique steel beams 3 and other related parts, in order to ensure that the ear plate gap between the columns and the connectors is not greater than 1mm, annular pads are symmetrically added between the ear plates. The thickness is determined according to the calculation of the ear plate gap. The pads within 5mm are purchased as finished galvanized pads, and those greater than 5mm are made of steel plates for cutting and painted with anti-rust paint; when installing the pin 6, use a pin 6 punch with equal diameter, connect the pin 6 punch and the pin 6 in series with bolts, and tap gently at the back with a rubber hammer, while placing the annular pad and tapping to improve the punching efficiency; Furthermore, some of the columns are in multiple groups, and the multiple groups of columns are connected by transverse connecting beams, and the transverse connecting beam structures are connected between them; Preferably, the transverse steel beam 2 and the transverse connecting beam adopt a sleeve structure, that is, the structure of the transverse steel beam 2 and the transverse connecting beam is composed of two sections, one end of the two sections facing each other is a sleeve, and the other end is a screw rod, and a rod-shaped connecting structure is formed by threading the sleeve and the screw rod. When the size is checked, the length can be adjusted by adjusting the sleeve thread length to ensure the lateral distance size; In another embodiment, before the column is installed and connected, a cylindrical member is supported at the bottom of the column. This arrangement can assist the movement of the column when the device is hoisted.

[0026] See also Figure 4 As shown, after the assembly inspection and acceptance, in order to ensure the in-situ installation of the transverse steel beam 2, each transverse steel beam 2 is connected to the upper vertical pole 1 or the inclined steel beam 3 with a wire rope 7. The length of the tying wire rope 7 is calculated according to the position of the transverse steel beam 2 after installation, and each end is connected with no less than 3 U-bolts.

[0027] S3: Installation of shoulder pole truss beam: When the shoulder pole truss beam 5 is manufactured, the whole includes two or more rod-shaped structures arranged in parallel, and a plurality of rods are connected between the parallel rod-shaped structures to form the shoulder pole truss beam 5. A lifting point with a lifting eye is arranged at the upper part of the shoulder pole truss beam 5, and a connecting hole is arranged at the lower part. The connecting hole can be connected with a "X"-shaped connecting piece through a bolt; Specifically, prepare H-shaped steel, lifting lugs, and "J"-shaped hanging plate materials in advance, and complete cutting, assembly, and welding. The shoulder pole is 6 / 14.3m long and 1.5m wide, and is a flat truss structure. The cross section is HW200*200, and the material is Q235B; the upper part of the shoulder pole truss beam 5 is welded with lifting lugs, and the lower part is connected to the vertical steel beam 4 through a "J" connector.

[0028] See also Figure 6 As shown, it is connected to the vertical frame beam through an I-shaped connector, and the connecting hole is an oblong hole, which is very convenient for corresponding connection with the hole on the I-shaped connector. A platform is set on the upper surface of the shoulder pole truss beam 5 to facilitate personnel operation and movement. After lifting, the oblique steel beam 3 and the vertical frame beam can be easily welded and fixed.

[0029] The shoulder pole truss beam 5 is installed by using a tower crane or other lifting equipment. There are four lifting points on the shoulder pole truss beam 5. The size of the lifting lug and the diameter of the lifting wire 8 are calculated according to the lifting weight. For uneven center of gravity, a hand winch with a corresponding rated weight is used to adjust the structure to make it stable.

[0030] When connecting the shoulder pole truss beam 5 and the vertical frame beam, fix them with a "J"-shaped connector and tighten the bolts securely, with the exposed wire length being no less than 2 wires. According to the length of the hoisting wire 8 and the center of gravity, calculate the adjustment length of the hand chain hoist so that the length before hoisting meets the balance requirement.

[0031] S4: Folding lifting: See also Figure 7 As shown, after the assembly size inspection is qualified and the safety measures are checked, the lifting can be started. During lifting, slowly lift the hook, and the boom cooperates with the trolley to rotate slightly. Use the lifting equipment to lift the lifting point, and slowly erect the first section. Check that there is no abnormality in the rods and wire ropes 7 and continue to lift. Erect each section, so that the multiple sections of columns correspond to the longitudinal reference and lift them one by one until the last section is off the ground 9. Note that the trolley and the boom should move in real time according to the assembly position during the process. After each section of the column is off the ground 9, it should be stationary for 2-5 minutes, and then slowly lift it again.

[0032] S5: Correction welding of the inclined section: According to the characteristics of the hanging structure system, the hook loosening requirement can be met by first fixing the inclined section, thereby reducing the use time of the tower crane and improving work efficiency.

[0033] See also Figure 8As shown, during installation, points a# and c# are raised by 5-10mm, and the coordinates of point b# remain unchanged. After positioning and fixing points a# and b# according to the floor reference point, straighten 4# with a fall chain to ensure that the verticality meets the requirements. After positioning the two end points of the inclined steel beam 3, weld and fix them, that is, weld points a# and c#. Note that the hoisting wire 8 must be under stress before welding is completed.

[0034] S6: Loose Hook: After all the connecting joints of the oblique steel beam 3 are welded, the "X"-shaped connecting pieces on the shoulder pole truss beam 5 are removed, and the shoulder pole truss beam 5 is dismantled by lifting the lifting point of the lifting equipment; Specifically, after all the welding of the connecting joints of the inclined section is completed, slowly loosen the hook until the lifting wire 8 is no longer under stress. During the process, observe whether the structure has any abnormalities or deformation. After confirmation, unscrew the connecting bolts, put them into the tool bag, use a tower crane to remove the shoulder pole truss beam 5, and continue to use it for the installation of the next set of hanging structures.

[0035] S7: Overall correction welding: See also Figure 8 As shown, use a chain to straighten the d# end point, use the c# end point as the base point as the vertical reference, and ensure that the c#-d# verticality meets the requirements; then, fix each remaining beam one by one. Note: Considering the shrinkage deformation after welding, the verticality deviation between the c# and d# points deviates to the outside.

[0036] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A foldable construction method for a fully pin-connected hanging structure, characterized in that: The following steps are involved: S1: Measurement and setting out: A horizontal reference line is set on each cable-stayed floor, and one or more stakeout reference lines are set every n meters as the longitudinal reference; S2: Ground assembly: On the ground, multiple columns are spliced ​​in sequence along the length direction by pins, and the vertical frame beam and the oblique steel beam are connected to the first section of columns. The first section of columns, the vertical frame beam and the oblique steel beam form a right triangle, wherein the vertical frame beam is located at the movable end of the column and is arranged perpendicular to the column, and a shoulder pole truss beam is arranged on the vertical frame beam; A transverse steel beam is rotatably connected to the column, and a steel wire rope is tied to the movable end of each transverse steel beam. The movable end of the steel wire rope is connected to the upper vertical pole or the oblique steel beam or the vertical frame beam according to the installation position of the transverse steel beam after lifting; S3: Installation of shoulder pole truss beam: The lifting points and platforms are set on the shoulder pole truss beam; S4: Folding lifting: Use the lifting equipment to hoist the lifting point, so that the multiple columns are lifted section by section corresponding to the longitudinal reference until the last column is off the ground; S5: Correction welding of the inclined section: Lift the two ends a# and c# of the inclined steel beam vertically by 5-10mm, leaving the height of the b# end unchanged, and position the two ends of the inclined steel beam according to the floor reference line and then weld and fix them; S6: Loose Hook: After all the connecting joints of the oblique steel beams are welded, the lifting points are hoisted by lifting equipment to dismantle the shoulder pole truss beams; S7: Overall correction welding: Use the c# endpoint as the base point to make the vertical reference, make the d# endpoint correspond to the vertical reference, and fix the transverse steel beam.

2. A foldable construction method for a full pin-connected hanging structure according to claim 1, characterized in that: In step S1, n is 20-50m.

3. A foldable construction method for a fully pin-connected hanging structure according to claim 1 or 2, characterized in that: In step S2, when the columns are connected, cylindrical components are supported at the bottom of the columns.

4. A foldable construction method for a fully pin-connected hanging structure according to claim 1 or 2, characterized in that: In step S2, wooden planks are used to pad the lower part of the column during assembly, and the outer wall of the column is wrapped with a flexible fireproof pad during assembly.

5. A foldable construction method for a fully pin-connected hanging structure according to claim 4, characterized in that: In step S2, when the steel wire rope is tied, each end is connected with no less than 3 U-bolt buckles.

6. A foldable construction method for a fully pin-connected hanging structure according to claim 1, characterized in that: In step S2, there are multiple groups of columns, and transverse connecting beams are connected between the multiple groups of columns.

7. The foldable construction method of the full pin-connected hanging structure according to claim 1 is characterized in that: The movable end of the steel wire rope on the transverse steel beam is connected to the vertical frame beam.

8. The foldable construction method of the full pin-connected hanging structure according to claim 1, characterized in that: In step S2, a lifting lug is welded to the upper portion of the shoulder pole truss beam, and the lower portion is connected to the vertical steel beam via an "X" connector.

9. The foldable construction method of the full pin-connected hanging structure according to claim 1, characterized in that: In step S3, a connecting hole corresponding to the "X" connecting piece is provided on the shoulder pole truss beam, and the connecting hole is an oblong hole.

10. The foldable construction method of the full pin-connected hanging structure according to claim 1, characterized in that: In step S4, when each section of the column is lifted to a vertical state, the column, the transverse steel beam and the steel wire rope are checked to be normal before continuing the lifting.

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