Simple steel structure external envelope purline mounting and hoisting mode

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a simple steel structure outer envelope purline mounting and hoisting mode. The method comprises the steps that S1, two sets of concrete columns and embedded parts are included, the embedded parts are fixedly installed on the concrete columns, hanging components are connected to the embedded parts, chain hoists are connected to the hanging components, and the two sets of chain hoists are bound and hung to the two ends of the steel structure purline correspondingly; s2, the crank arm vehicle is supported on the middle section of the steel structure purline, the two chain hoists pull the two ends of the steel structure purline, and the crank arm vehicle pushes the middle section of the steel structure purline to be in a straight state in the initial state; s3, the crank arm vehicle and the two sets of chain hoists alternately push and pull the steel structure purline to ascend, the bending state of the steel structure purline is observed, and the steel structure purline is in an elastic deformation stage in the push and pull process till the steel structure purline is pushed and pulled to a preset position; s4, after the steel structure purline is in the straight state, the steel structure purline is welded and fixed by workers, and final operation is completed; the steel structure purline can be prevented from deforming in the hoisting process.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and particularly relates to an installation and hoisting method for simple steel structure external enclosure purlins. Background Art

[0002] In some large-span factories, in order to ensure sufficient space in the factory building, the distance between the walls is relatively large, resulting in a relatively long length of the steel structure purlins at the top of the factory building. During the construction process, when the steel structure purlins are in a long state and the number of lifting points is insufficient and the position distribution is uneven during hoisting, it is easy to cause deformation of the steel structure purlins after being lifted. The deformation of the steel structure purlins leads to deviation of the hole positions during installation, further causing difficulties in the installation of the steel structure purlins. Therefore, the installation accuracy requirements for the steel structure purlins during hoisting are more stringent than those for general steel structure hoisting. The main reason is that the external enclosure purlins need to accurately support the roof panel or wall panel, and the hole position alignment, levelness and spacing deviation need to be controlled within ±5 mm (much higher than the allowable deviation of ±10 - 20 mm for steel beams), and it cannot be adjusted like steel beams in the later stage. Therefore, multi-point balanced hoisting needs to be adopted during hoisting to avoid bending of long and slender components due to uneven stress; at the same time, it is necessary to monitor in real time through a total station or a laser locator, and cooperate with manual fine-tuning to ensure that the hole positions at both ends of the steel structure purlins are quickly aligned with the purlin support plates of the steel beams, and use temporary bolts, C-shaped clips or cables to resist the disturbance of high-altitude wind loads.

[0003] At present, in the field of hoisting in steel structure projects, in order to avoid bending of steel structure purlins due to uneven stress, tower cranes or cranes are usually used for hoisting. Using the tower crane method often takes most of the time of the tower crane, affecting the operation of other processes, and the tower crane cannot perform hoisting operations in the dead corner area, resulting in low construction efficiency and high construction costs. Using the crane for hoisting requires considering the bearing capacity and flatness of the surrounding ground, and the time for secondary transfer of the crane position is relatively long, and the process is cumbersome, resulting in a secondary increase in construction costs.

[0004] Therefore, in order to avoid bending and deformation of steel structure purlins during hoisting without affecting construction efficiency, an installation and hoisting method for simple steel structure external enclosure purlins is proposed. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the invention provides an installation and hoisting method for simple steel structure external enclosure purlins.

[0006] The object of the invention can be achieved by the following technical solutions:

[0007] An installation and hoisting method for simple steel structure external enclosure purlins of the invention comprises the following steps:

[0008] S1: It includes two groups of concrete columns and embedded parts. The embedded parts are fixedly installed on the concrete columns. A lifting member is connected to the embedded parts, and a manual hoist is connected to the lifting member. The two manual hoists are respectively tied and lifted at both ends of the steel structure purlin.

[0009] S2: It further includes an articulated boom vehicle. The articulated boom vehicle supports the middle section of the steel structure purlin, so that the two manual hoists pull both ends of the steel structure purlin and the articulated boom vehicle pushes the middle section of the steel structure purlin to a straight state in the initial state.

[0010] S3: After starting the lifting, make the articulated boom vehicle and the two manual hoists alternately push and pull the steel structure purlin to rise, observe the bending state of the steel structure purlin and make the steel structure purlin in the elastic deformation stage during the pushing and pulling process until it is pushed and pulled to the predetermined position.

[0011] S4: After the steel structure purlin rises to the predetermined position and is in a straight state, the worker completes the final operation by welding and fixing the steel structure purlin on the articulated boom vehicle.

[0012] Further, in the step S3, it further includes step S31: A positioning steel wire rope is vertically connected to the ground on the side of the embedded part, and the positioning steel wire rope passes through the positioning hole on the steel structure purlin, so that the steel structure purlin is vertically hoisted to the predetermined height with the positioning steel wire rope as the guide.

[0013] Further, in the step S3, it further includes step S32: When lifting both ends of the steel structure purlin by the two manual hoists, observe the state of the middle section of the steel structure purlin dropping and pulling the offset of the positioning steel wire ropes at both ends. Judge the bending state of the steel structure purlin through the offset state of the positioning steel wire ropes, and make the articulated boom vehicle push the middle section of the steel structure purlin to rise before the steel structure purlin reaches the critical value of the elastic deformation stage.

[0014] Further, in the step S31, a winding wheel is rotatably connected to the side of the embedded part. The top of the positioning steel wire rope is wound on the winding wheel. A torsion spring is arranged between the winding wheel and the embedded part. The torsion spring is used to drive the winding wheel to rotate and then reset. A scale is arranged on the circumferential surface of the winding wheel. The worker judges the deviation state of the positioning steel wire rope by observing the state of the scale on the winding wheel after rotation.

[0015] Further, the scale is provided with a color comparison card.

[0016] Further, in the step S4, it further includes step S41: When the steel structure purlin is hoisted to the predetermined height and is in a straight state, move the positioning steel wire rope out of the notch on the side of the positioning hole.

[0017] Further, in the step S4, it further includes step S42: after the steel structure purlin is welded to the structural member of the concrete column, first disconnect the connections between the two ends of the steel structure purlin and the manual hoist, and then slowly lower the articulated boom vehicle and separate it from the steel structure purlin.

[0018] Further, in the step S4, it further includes step S43: after the hoisting of the steel structure purlin is completed, remove the positioning steel rope at this position.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) Through the binding and hoisting of the two ends of the steel structure purlin by the manual hoist, and then through the support of the middle section of the steel structure purlin by the articulated boom vehicle. When the two ends of the steel structure purlin are first hoisted to a certain height by the manual hoists at both ends and the steel structure purlin is within the range of elastic deformation stage, then the articulated boom vehicle is used to push up the sagging part in the middle section of the steel structure purlin until it is flush with the two ends. The manual hoists at the two ends of the steel structure purlin and the articulated boom vehicle in the middle section alternately pull and push, so that the steel structure purlin will not produce irreversible plastic deformation during hoisting. At the same time, compared with the crane, it can save more construction space, will not affect the progress of other processes, improve the work efficiency and save costs;

[0021] (2) By connecting a positioning steel rope vertically to the ground on the side of the embedded part, and making the positioning steel rope pass through the positioning holes on the steel structure purlin, observing the deviation state of the two ends of the positioning steel rope, the magnitude of the sag of the steel structure purlin can be judged, and further, it can be judged whether the steel structure purlin is within the elastic deformation stage, so as to avoid irreversible deformation of the steel structure purlin caused by too long single hoisting distance of the two groups of manual hoists for the steel structure purlin. Description of the Drawings

[0022] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the drawings.

[0023] Figure 1 It is the construction step flow chart of the present invention;

[0024] Figure 2 It is the overall structure schematic diagram of the present invention;

[0025] Figure 3 It is the front structure schematic diagram of the embedded part of the present invention;

[0026] Figure 4 It is the side structure schematic diagram of the embedded part of the present invention;

[0027] Legend: 1, concrete column; 2, embedded part; 3, lifting member; 4, manual hoist; 5, steel structure purlin; 6, articulated boom vehicle; 7, positioning steel rope; 8, winding wheel. Detailed implementation mode

[0028] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, elaborate in detail on the specific implementation mode, structure, features and their effects of the present invention.

[0029] As Figures 1-4 shown; A simple steel structure exterior enclosure purlin installation and hoisting method of the present invention includes the following steps:

[0030] S1: It includes two groups of concrete columns 1 and embedded parts 2. The embedded parts 2 are fixedly installed on the concrete columns 1. A lifting member 3 is connected to the embedded parts 2, and a manual hoist 4 is connected to the lifting member 3. The two manual hoists 4 are respectively tied and hoisted at both ends of the steel structure purlin 5;

[0031] S2: It also includes an articulated boom vehicle 6. The middle section of the steel structure purlin 5 is supported by the articulated boom vehicle 6, so that the two manual hoists 4 pull both ends of the steel structure purlin 5 and the articulated boom vehicle 6 pushes the middle section of the steel structure purlin 5 to the straight state in the initial state;

[0032] S3: After starting the hoisting, make the articulated boom vehicle 6 and the two manual hoists 4 alternately push and pull the steel structure purlin 5 to rise, observe the bending state of the steel structure purlin 5 and make the steel structure purlin 5 in the elastic deformation stage during the pushing and pulling process until it is pushed and pulled to the predetermined position;

[0033] S4: After the steel structure purlin 5 rises to the predetermined position and is in a straight state, the worker welds and fixes the steel structure purlin 5 on the articulated boom vehicle 6 to complete the final operation.

[0034] By tying and hoisting both ends of the steel structure purlin 5 with the manual hoist 4, and then supporting the middle section of the steel structure purlin 5 with the articulated boom vehicle 6. When both ends of the steel structure purlin 5 are first hoisted to a certain height by the manual hoists 4 at both ends and the steel structure purlin 5 is within the range of elastic deformation stage, then the articulated boom vehicle 6 pushes up the sagging part in the middle section of the steel structure purlin 5 until it is flush with both ends. The manual hoists 4 at both ends of the steel structure purlin 5 and the articulated boom vehicle 6 in the middle section alternately pull and push, so that the steel structure purlin 5 will not produce irreversible plastic deformation during hoisting. At the same time, compared with a crane, it can save more construction space, will not affect the progress of other processes, improves work efficiency and can also save costs.

[0035] Since the steel structure purlin 5 is hoisted to a relatively high height during the construction process, it is prone to swing due to the influence of wind, resulting in difficulty in connecting with the corresponding structural members on the concrete column 1 after being hoisted to the predetermined height. To avoid this problem, in one embodiment, in step S3, it further includes step S31: a positioning steel cable 7 is vertically connected to the ground on the side of the embedded part 2, and the positioning steel cable 7 passes through the positioning hole on the steel structure purlin 5, so that the steel structure purlin 5 is vertically hoisted to the predetermined height with the positioning steel cable 7 as the guide;

[0036] The position where the positioning steel cable 7 is connected to the embedded part 2, the positioning hole on the steel structure purlin 5, and the position where the positioning steel cable 7 is connected to the ground are on the same vertical line. When the positioning hole on the steel structure purlin 5 can be an annular structure extending from its side surface, it is convenient for the positioning steel cable 7 to pass through. Through the positioning of the steel structure purlin 5 by the positioning steel cable 7, it is possible to prevent the steel structure purlin 5 from swinging too much due to wind, and improve the stability of the steel structure purlin 5 during the hoisting process.

[0037] Since in the above embodiment, through the alternate pushing and pulling of the middle section of the steel structure purlin 5 by the articulated boom truck 6 and the two groups of manual hoists 4 at both ends of the steel structure purlin 5, it is necessary to avoid the single pulling distance of the two manual hoists 4 at both ends being too large when the articulated boom truck 6 pushes the middle section of the steel structure purlin 5. Therefore, it is necessary to judge the bending state of the steel structure purlin 5. To avoid errors in judgment, in one embodiment, in step S3, it further includes step S32: when the two groups of manual hoists 4 hoist the two ends of the steel structure purlin 5, observe the state of the middle section of the steel structure purlin 5 dropping and pulling the two end positioning steel cables 7 to deviate after rising. Judge the bending state of the steel structure purlin 5 through the deviation state of the positioning steel cable 7, so that the articulated boom truck 6 pushes the middle section of the steel structure purlin 5 to rise before reaching the critical value of the elastic deformation stage;

[0038] That is, when the two groups of manual hoists 4 pull the two ends of the steel structure purlin 5 to rise a certain distance, the middle section of the steel structure purlin 5 will droop. The drooping of the middle section of the steel structure purlin 5 will cause the shortening of its horizontal length range, and then pull the positioning steel cables 7 passing through its two ends to deviate towards the center. By observing the deviation state of the two end positioning steel cables 7, the magnitude of the drooping of the steel structure purlin 5 can be judged, and further judge whether the steel structure purlin 5 is in the elastic deformation stage, so as to avoid the irreversible deformation of the steel structure purlin 5 caused by the single hoisting distance of the two groups of manual hoists 4 being too long.

[0039] In the above embodiments, the two manual hoists 4 are used to pull both ends of the steel structure purlin 5, so that the middle section droops after both ends are lifted, and the positioning steel rope 7 is pulled to deviate. If neither the upper and lower ends of the positioning steel rope 7 are fixed, the positioning steel rope 7 will be stretched and deformed after long-term use, resulting in a change in the deviation amplitude after being pulled by the steel structure purlin 5. In order to ensure the observation and judgment effect, the service life of the positioning steel rope 7 is short. In order to enable the positioning steel rope 7 to be used for a long time, in one embodiment, in step S31, a winding wheel 8 is rotatably connected to the side of the embedded part 2, the top of the positioning steel rope 7 is wound around the winding wheel 8, and a torsion spring is arranged between the winding wheel 8 and the embedded part 2. The torsion spring is used to drive the winding wheel 8 to rotate and then reset. A scale is arranged on the circumferential surface of the winding wheel 8, and the worker judges the deviation state of the positioning steel rope 7 by observing the state of the scale after the winding wheel 8 rotates;

[0040] In the initial state, the winding wheel 8 is in a state of positive rotation tendency under the elastic force of the torsion spring, and the positioning steel rope 7 is wound around the winding wheel 8 for several circles in the initial state. The torsion spring can also keep the positioning steel rope 7 in a taut state. When the two manual hoists 4 lift both ends of the steel structure purlin 5, the middle section of the steel structure purlin 5 droops. The steel structure purlin 5 pulls the positioning steel rope 7 passing through the positioning holes at both ends. At this time, the positioning steel rope 7 is subjected to a tensile force and will pull the winding wheel 8 to rotate in the reverse direction to release part of the positioning steel rope 7, so that the positioning steel rope 7 shows a certain deviation. At the same time, a scale is arranged on the circumferential surface of the winding wheel 8, and the rotation amplitude of the winding wheel 8 can be observed through the scale. And the rotation angle of the winding wheel 8 can be compared with the bending amplitude of the steel structure purlin 5. By observing the position of the scale, the bending state of the steel structure purlin 5 can be judged. Then, before the steel structure purlin 5 reaches the limit critical value of elastic deformation, the worker needs to operate the articulated boom vehicle 6 to lift the middle section of the steel structure purlin 5 to a state flush with both ends.

[0041] Further, a color comparison card is provided on the scale. The colors at different scale positions of the scale are different. Since the distance is large during the construction process and it is difficult to observe the digital scale, it is easier to judge by the corresponding colors on the scale.

[0042] Further, in step S4, it further includes step S41: when the steel structure purlin 5 is hoisted to the predetermined height and is in a straight state, the positioning steel rope 7 is removed from the notch on the side of the positioning hole. A notch is provided on the positioning hole of the steel structure purlin 5 to facilitate the loading and unloading of the positioning steel rope 7. And since the positioning steel rope 7 is pulled to deviate towards the middle through the positioning hole, the notch on the positioning hole cannot be on the outside and needs to be on the side to prevent the positioning steel rope 7 from detaching from the positioning hole during the hoisting process of the steel structure purlin 5.

[0043] Further, in step S4, it further includes step S42: after the steel structure purlin 5 is welded to the structural member of the concrete column, first disconnect the connections between the two ends of the steel structure purlin 5 and the manual hoist 4, and then slowly lower the articulated boom vehicle 6 and separate it from the steel structure purlin 5.

[0044] Further, in step S4, it further includes step S43: after the hoisting of the steel structure purlin 5 is completed, remove the positioning steel rope 7 at this position, install the removed positioning steel rope 7 and the winding wheel 8 at the next hoisting position, and perform the next hoisting.

[0045] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A simple installation and hoisting method for purlins of the steel structure exterior enclosure, characterized in that: It includes the following steps: S1: It includes two groups of concrete columns and embedded parts. The embedded parts are fixedly installed on the concrete columns. A lifting member is connected to the embedded parts, and a manual hoist is connected to the lifting member. The two manual hoists are respectively tied and hoisted to both ends of the steel structure purlin; S2: It also includes a boom truck. The middle section of the steel structure purlin is supported by the boom truck, so that the two manual hoists pull both ends of the steel structure purlin and the boom truck pushes the middle section of the steel structure purlin to a straight state in the initial state; S3: After starting the hoisting, the boom truck and the two manual hoists alternately push and pull the steel structure purlin to rise, observe the bending state of the steel structure purlin and make the steel structure purlin in the elastic deformation stage during the pushing and pulling process until it is pushed and pulled to the predetermined position; S4: After the steel structure purlin rises to the predetermined position and is in a straight state, the worker completes the final operation by welding and fixing the steel structure purlin.

2. The installation and hoisting method of a simple steel structure exterior enclosure purlin according to claim 1, characterized in that: In the step S3, it also includes the step S31: A positioning steel wire is vertically connected to the ground on the side of the embedded part, and the positioning steel wire passes through the positioning hole on the steel structure purlin, so that the steel structure purlin is vertically hoisted to the predetermined height with the positioning steel wire as the guide.

3. A simple steel structure outer enclosure purlin installation and hoisting method according to claim 2, characterized in that: In the step S3, it also includes the step S32: When the two manual hoists lift both ends of the steel structure purlin, observe the state of the middle section of the steel structure purlin dropping and pulling the offset of the positioning steel wires at both ends. Judge the bending state of the steel structure purlin through the offset state of the positioning steel wires, and make the boom truck push the middle section of the steel structure purlin to rise before the steel structure purlin reaches the critical value of the elastic deformation stage.

4. A simple steel structure peripheral purlin installation and hoisting method according to claim 3, characterized in that: In the step S31, a winding wheel is rotatably connected to the side of the embedded part. The top of the positioning steel wire is wound on the winding wheel. A torsion spring is arranged between the winding wheel and the embedded part. The torsion spring is used to drive the winding wheel to rotate and reset. A scale is arranged on the circumferential surface of the winding wheel. The worker judges the deviation state of the positioning steel wire by observing the state of the scale on the winding wheel after rotation.

5. A simple steel structure outer enclosure purlin installation and hoisting method according to claim 4, characterized in that: The scale is provided with a color comparison card.

6. A simple steel structure perimeter purlin installation and hoisting method according to claim 2, characterized in that: In the step S4, it also includes the step S41: When the steel structure purlin is hoisted to the predetermined height and is in a straight state, move the positioning steel wire out of the notch on the side of the positioning hole.

7. A simple steel structure outer enclosure purlin installation and hoisting method according to claim 6, characterized in that: In the step S4, it also includes the step S42: When the steel structure purlin is welded to the structural member of the concrete column, first release the connection between both ends of the steel structure purlin and the manual hoist, and then slowly lower the boom truck and separate it from the steel structure purlin.

8. A simple steel structure outer enclosure purlin installation and hoisting method according to claim 7, characterized in that: In the step S4, it also includes the step S43: When the hoisting of the steel structure purlin is completed, remove the positioning steel wire at this position.

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