CN115846924A - High-altitude integral lifting butt joint precision control method - Google Patents
High-altitude integral lifting butt joint precision control method Download PDFInfo
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- CN115846924A CN115846924A CN202310005425.0A CN202310005425A CN115846924A CN 115846924 A CN115846924 A CN 115846924A CN 202310005425 A CN202310005425 A CN 202310005425A CN 115846924 A CN115846924 A CN 115846924A
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Abstract
The invention discloses a high-altitude integral lifting butt joint precision control method, which comprises the following steps: a plurality of butt-joint pieces are arranged on the specified height of the opposite surfaces of two adjacent buildings in advance; a set of lifting frame is arranged on each butt joint piece, and the mounting position of a lifter on each lifting frame is positioned right above the butt joint piece; measuring three-dimensional coordinates of the end part and the root part on the central axis of each butt joint piece and the three-dimensional coordinates of a central hole on the lifting frame, and measuring the three-dimensional coordinates of the end part of the central axis of the upper flange plate of each chord main beam on the steel gallery; drawing a butt joint piece, a lifting frame plane layout drawing and a steel corridor plane layout drawing; the computer makes the center point O1 of the plane layout of the middle butt joint piece, the lifting frame and the center point O2 of the plane layout of the steel corridor coincide to perform simulated butt joint, and the welding position of the lower anchor is determined; according to the welding position, the lower anchorage device is welded, the lifter is started to lift the steel corridor, the steel corridor is not required to be positioned right below the butt joint piece or the lifting frame before lifting, and the position deviation of about 100mm is allowed.
Description
Technical Field
The invention relates to the technical field of building structure construction, in particular to a high-altitude integral lifting butt joint precision control method.
Background
The high altitude of steel construction promotes, must guarantee to promote the butt joint precision when taking one's place, and the operation method commonly used at present is: vertical control is carried out by a laser plummet internal control method, plane coordinate projection measurement rechecking and elevation transmission are carried out by a total station and a 90-degree bent pipe eyepiece vertical elevation transmission method, high-altitude butt joint steel beams (or corbels) and lifting equipment central points are vertically projected to the ground, steel structure assemblies are assembled on the ground according to projection butt joint point positions, and lower lifting appliances are welded on the steel structure assemblies. However, for high-rise and super high-rise buildings, the operation method is inaccurate in result, the long-distance measurement and positioning in the vertical direction amplifies the self error of the instrument, and on the other hand, the measurement deviation caused by human factors cannot be ignored in the elevation transmission and projection measurement processes.
In recent years, with the development of science and technology, intelligent measurement technologies based on a satellite positioning system, a three-dimensional laser scanner, the internet of things, wireless data transmission and the like are adopted, measurement deviation of human factors is reduced, measurement accuracy is improved a little, however, for long-distance vertical measurement of an ultra-high layer, measurement deviation caused by the accuracy of the system still exceeds the standard requirement of steel structure installation, and meanwhile, measurement cost is increased due to the use of new intelligent equipment.
The contrast document CN115162520A discloses a construction method of a lotus tower steel structure, firstly, TEKLA software is utilized to carry out deepening design on a special-shaped overhanging lotus tower steel structure, then the construction thought of ground pre-splicing and sheet body hoisting high-altitude butt joint is provided, the lotus tower is vertically divided into one section of 10 meters in the steel structure, two columns in the y direction are spliced into one sheet body, small units are pre-spliced in a splicing field, the precision of butt joint is strictly controlled by pre-splicing the ground, the high-altitude operation risk is reduced while the high-altitude installation operation amount is reduced, reasonable segmentation and hoisting are carried out on the form of the lotus steel structure, split small units are mainly adopted for splicing in the mode, the construction speed is undoubtedly slowed down on the high-altitude butt joint of a steel corridor by applying the mode, and the butt joint error can also be enlarged due to split hoisting butt joint of the steel corridor.
Disclosure of Invention
The invention aims to provide a control method for integrally improving the butting precision at high altitude, so as to solve the problem of long-distance projection measurement deviation of a high-rise (or super high-rise) at the vertical height, and achieve the aims of reducing the cost and improving the precision by changing a measurement method.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme: the control method for the high-altitude integral lifting butt joint precision comprises the following steps:
s1: a plurality of butt-joint pieces are installed at the specified height of the opposite surfaces of two adjacent buildings in advance, and the installation position precision of the butt-joint steel beams is required to meet the requirements of the acceptance standard of construction quality of steel structure engineering (GB 50205-2020);
s2: a set of lifting frame is arranged on each butt joint piece, and the mounting position of a lifter on each lifting frame is positioned right above the butt joint piece;
s3: measuring three-dimensional coordinates of the end part and the root part on the central axis of each butt joint piece and three-dimensional coordinates of a central hole on the lifting frame, and measuring three-dimensional coordinates of the end part of the central axis of the flange plate on each chord main beam on the steel corridor;
s4: drawing a butt joint piece, a lifting frame plane layout drawing and a steel corridor plane layout drawing;
s5: the computer makes the butt joint piece, the lifting frame plane layout central point O1 and the steel corridor plane layout central point O2 coincide in the S4 to carry out simulated butt joint, and the welding position of the lower anchor is determined;
s6: and (5) starting the lifter on site to lift the steel corridor, welding a lower lifting anchorage device on the upper chord of the steel corridor according to the welding position in the step S5, and completing subsequent interface connection, unloading and dismounting of the lifting device.
And the butt joint piece in the S1 is a butt joint steel beam or a bracket.
And in the S3, the mounting position of the lifter is coaxial with the central hole in the lifting frame.
The step of determining the positions of the central points of the two floor plan maps in the step S5 is as follows:
s5-1: connecting the coordinate points of the end parts of the butt joint pieces on the left side in the butt joint piece and lifting frame plane arrangement drawing to obtain an auxiliary line L1, connecting the coordinate points of the end parts of the butt joint pieces on the right side in the butt joint piece and lifting frame plane arrangement drawing to obtain an auxiliary line L2, and finally connecting the center points of the auxiliary line L1 and the auxiliary line L2 to obtain a central axis L3, wherein the center of the central axis L3 is a center point O1;
s5-2: connecting steel vestibule plane arrangement drawing left side steel vestibule tip coordinate point and obtaining auxiliary line L4, connecting steel vestibule plane arrangement drawing right side steel vestibule tip coordinate point and obtaining auxiliary line L5, connecting the central point of auxiliary line L4 and auxiliary line L5 at last and obtaining center pin L6, the center of center pin L6 is central point O2 promptly.
And after the central points O1 of the butt joint piece and the lifting frame plane layout drawing coincide with the central point O2 of the steel corridor plane layout drawing, rotating the steel corridor plane layout drawing to enable a central axis L6 to coincide with a central axis L3, wherein the projection position of the lifting frame central hole on the steel corridor is the welding position of the lower anchorage device.
Obtaining a lower anchorage welding coordinate by matching the small prism with the total station; the total station is arranged above the leveling base surface, a station is built by using a rear intersection function according to the three-dimensional coordinates of the end part of the central axis of the upper flange plate of the upper chord main beam of the steel corridor, the small prism is matched with a lofting function of the total station to lower the specific position of the anchor at the marked position on the steel corridor, and finally the welding of the anchor is completed.
S6 in the scene start the lifting mechanism and arrange the girder steel correspondence of steel vestibule in during the butt joint spare, operate the lifting mechanism one by one again, finely tune about carrying out the elevation to the steel vestibule, guarantee the butt joint precision.
According to the technical scheme, the invention at least has the following effects:
the invention solves the problem of remote projection and measurement deviation of high-rise (or super high-rise) lifting construction on a vertical height, does not need to accurately and vertically project high-altitude butt joint steel beams (or corbels) and central points of lifting equipment to the ground, does not need to be completely positioned under a butt joint position when a lifted steel structure assembly (steel corridor) is assembled on the ground, and allows deviation within 100mm, thereby greatly reducing measurement difficulty and improving the precision of a butt joint.
Drawings
FIG. 1 is a plan view of a steel gallery plan view for an axis analysis (top view);
FIG. 2 is an elevation view of a steel gallery;
FIG. 3 is a plan view of the lifting frames and the butt-jointed steel beams of the present invention
FIG. 4 is a coordinate position diagram of the upper anchorage device and the lower anchorage device of the steel corridor;
FIG. 5 is a center point and axis analysis diagram of a floor plan of the hoisting frame and the butted steel beams according to the present invention;
FIG. 6 is a schematic view of the butt joint of the steel beam and the steel gallery;
fig. 7 is a schematic lifting diagram in the butt joint process of the steel gallery.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Take the project of building engineering scientific and technological park in Yangzhou city A2, A3 building air vestibule as example:
the aerial steel gallery adopts the ground assembly integral lifting technology, and is lifted to 23 layers of top plate elevations to be accurately connected with the butt-jointed steel beams, so that the unique shape of the aerial gallery is formed. Because the section specification of the lower chord butt-joint steel beam of the project steel gallery is small, the butt joint can be completed by adopting an initiating explosive correction mode; the section specification of the upper chord butt-joint steel beam is large, and the construction difficulty is high, so that the main task of the lifting is to improve the butt-joint precision of the upper chord four butt-joint steel beams. One end of the butt joint steel beam is connected with a steel column and a beam in the concrete, and the other end of the butt joint steel beam is exposed out of the floor by 3515mm. Install one set of hoisting frame directly over 4 butt joint girder steels, respectively place a lifting mechanism on every hoisting frame girder, the lifting mechanism passes through steel strand wires and connects steel gallery upper chord lower anchor point and realize the whole synchronous promotion of steel gallery, and the particular case is as shown in the figure:
on the top floor of the 23 stories, the butted steel beams and the lifting frames are already installed. And on the ground jig frame, assembling the steel gallery to be lifted. The position of the lower anchor point is crucial at this moment, and the butt joint precision of the steel corridor high-altitude overall improvement is directly determined.
1. And (3) a measuring stage:
(1) Referring to the attached figure 3, a total station is erected on the top floor of the 23 floors to establish an integral coordinate system of the A2 and A3 floors, and three-dimensional coordinates (a point A1, a point B1, a point C1 and a point D1) of the end part, three-dimensional coordinates (a point A2, a point B2, a point C2 and a point D2) of the central axis of the wing plate on each butt-jointed steel beam, three-dimensional coordinates (a point A3, a point B3, a point C3 and a point D3) of the central hole of the lifting frame and the total station are measured in the coordinate system. And drawing a plane layout drawing of the butted steel beams and the lifting frame in the CAD according to the measurement data.
(2) Observing the attached figure 4, erecting the total station again on the floor of 2 floors, establishing a new coordinate system, and measuring the three-dimensional coordinates (point A4, point B4, point C4 and point D4) of the end part of the central axis of the upper flange plate of the upper chord main beam of the steel corridor which is assembled and arranged on the jig frame. According to the measurement data, drawing a steel corridor plane layout drawing in the CAD, and clearly seeing the plane position relation of the butt joint interface.
In the measuring stage, after the steel beam butt joint, the lifting frame plane arrangement diagram and the steel corridor plane arrangement diagram are arranged, the plane diagram analysis stage is started.
2. And (3) an analysis stage:
(1) In a plane layout drawing of the butted steel beams and the lifting frame, connecting points L1 as auxiliary lines are connected with coordinate points A1 and B1 at the end parts of the butted steel beams; and an auxiliary line L2 is used for connecting coordinate points C1 and D1 at the end parts of the butted steel beams. And respectively connecting the middle points of the auxiliary lines L1 and L2 into a line segment, recording the line segment as a central axis L3 of the butted steel beam, recording the middle point of the central axis L3 of the butted steel beam as a central point O1 of the butted steel beam, and observing the details in an attached drawing 5.
(2) In the plane layout diagram of the steel corridor, referring to the attached figure 1, an auxiliary line L4 is taken to connect coordinate points A4 and B4 at the end part of the steel corridor; and an auxiliary line L5 is used for connecting the coordinates C4 and D4 of the end part of the steel corridor. And respectively taking the middle points of the auxiliary lines L4 and L5 to form a line segment, recording the line segment as the central axis L6 of the steel corridor, and taking the middle point of the central axis L6 of the steel corridor as the central point O2 of the steel corridor.
3. And (3) a simulation butt joint stage: simulating and butting the butted steel beams, the lifting frame plane layout drawing and the steel corridor plane layout drawing; the final simulation butt joint completion state of the two plane layout diagrams in the attached drawing 6 is defined as a unit block, a butt joint steel beam central point O1 is picked up to be overlapped with a steel corridor central point O2, so that the butt joint steel beam, the lifting frame plane layout diagram and the steel corridor plane layout diagram rotate around the same central point (O1, O2), a butt joint steel beam central axis L3 and a steel corridor central axis L6 are selected to rotate around the same central point (O1, O2) to be horizontal, at the moment, the butt joint steel beam central axis L3 is overlapped with the steel corridor central axis L6, namely, the butt joint steel beam and the steel corridor have the same central point and the same central axis. At the moment, offset errors of the four butted steel beams and manufacturing errors of the steel corridor are evenly distributed to 4 butted interfaces, and the deviation is reduced by adopting a method of dividing the steel corridors into middle parts and equal deviation, so that the aim of improving the precision is fulfilled.
The positional deviation of the steel gallery from the butted steel beams at the 4 butt joints can be clearly seen in fig. 6. The projection position of the three-dimensional coordinates (point A3, point B3, point C3 and point D3) of the center hole of the lifting frame on the steel corridor can be obtained from the simulated butt joint diagram of the steel corridor, and the position is the final position of the anchorage device on the upper chord and the lower chord of the steel corridor.
Drawing the position relation of the lower anchorage device on the steel corridor plane layout drawing to obtain the three-dimensional coordinates (point A5, point B5, point C5 and point D5) of the lower anchorage device, wherein the fixed points of the lower anchorage device are accurately marked in the attached drawing 4:
the total station is erected on a three-floor, the floor is selected to be actually determined according to the height of a steel corridor, when an anchorage device fixing point on the steel corridor is actually confirmed on site, a rear intersection function is used for building a station according to the end three-dimensional coordinates (point A4, point B4, point C4 and point D4) of the central axis of the upper flange plate of the upper chord main beam of the steel corridor, a marker pen is used for marking the specific position of the anchorage device at the upper chord mark position of the steel corridor by matching the lofting function of the total station, and finally, the anchorage device is welded.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (7)
1. The method for controlling the high-altitude overall lifting butt joint precision is characterized by comprising the following steps of:
s1: installing a plurality of butt-joint pieces on the specified height of the opposite surfaces of two adjacent buildings in advance;
s2: a set of lifting frame is arranged above each butt joint piece, and the mounting position of a lifter on the lifting frame is positioned right above the butt joint piece;
s3: measuring three-dimensional coordinates of the end part and the root part on the central axis of each butt joint piece and three-dimensional coordinates of a central hole on the lifting frame, and measuring three-dimensional coordinates of the end part of the central axis of the flange plate on each chord main beam on the steel corridor;
s4: drawing a butt joint piece, a lifting frame plane layout drawing and a steel corridor plane layout drawing;
s5: the computer makes the butt joint piece, the lifting frame plane layout central point O1 and the steel corridor plane layout central point O2 coincide in the S4 to carry out simulated butt joint, and the welding position of the lower anchor is determined; welding a lifting lower anchorage device on the upper chord of the steel corridor according to the welding position;
s6: and starting the lifter on site to lift the steel corridor.
2. The high-altitude overall lifting docking precision control method according to claim 1, wherein the docking piece in the S1 is a docking steel beam or a corbel.
3. The high-altitude overall lifting and docking accuracy control method according to claim 1, wherein the mounting position of the lifter in the S3 is coaxial with a central hole in the lifting frame.
4. The high-altitude overall lifting docking accuracy control method according to claim 1, wherein the determination of the positions of the center points of the two floor plan maps in S5 comprises the following steps:
s5-1: connecting the coordinate points of the end parts of the butt joint pieces on the left side in the butt joint piece and lifting frame plane arrangement drawing to obtain an auxiliary line L1, connecting the coordinate points of the end parts of the butt joint pieces on the right side in the butt joint piece and lifting frame plane arrangement drawing to obtain an auxiliary line L2, and finally connecting the center points of the auxiliary line L1 and the auxiliary line L2 to obtain a central axis L3, wherein the center of the central axis L3 is a center point O1;
s5-2: connect steel vestibule plane arrangement drawing left side steel vestibule tip coordinate point and obtain auxiliary line L4, connect steel vestibule plane arrangement drawing right side steel vestibule tip coordinate point and obtain auxiliary line L5, the central point of connecting auxiliary line L4 and auxiliary line L5 at last obtains central axis L6, and the center of central axis L6 is central point O2 promptly.
5. The high-altitude integral lifting and docking accuracy control method as claimed in claim 4, wherein after the central point O1 of the docking piece and the lifting frame plane layout coincides with the central point O2 of the steel corridor plane layout, the steel corridor plane layout is rotated so that the central axis L6 coincides with the central axis L3, and the projection position of the lifting frame central hole on the steel corridor is the lower anchorage welding position.
6. The high altitude integral lifting docking accuracy control method according to claim 5, characterized in that a lower anchorage welding position is measured by using a small prism in cooperation with a total station; the total station is arranged above the leveling base surface, a station is built by using a rear intersection function according to the three-dimensional coordinates of the end part of the central axis of the upper flange plate of the upper chord main beam of the steel corridor, the small prism is matched with a lofting function of the total station to lower the specific position of the anchor at the marked position on the steel corridor, and finally the welding of the anchor is completed.
7. The high-altitude overall lifting docking precision control method according to claim 1, wherein when the hoists are synchronously started on site in S6 to correspondingly place the steel gallery lifting steel beams on the docking pieces, synchronous operation is stopped, the hoists are operated one by one to finely adjust the elevation of the steel gallery up and down, and docking precision is ensured.
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| CN202310005425.0A CN115846924A (en) | 2023-01-04 | 2023-01-04 | High-altitude integral lifting butt joint precision control method |
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| CN202310005425.0A CN115846924A (en) | 2023-01-04 | 2023-01-04 | High-altitude integral lifting butt joint precision control method |
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