Construction method for controlling positioning precision of outer edge line of irregular arc-shaped cantilever floor support plate

Abstract

The present application relates to a kind of irregular arc cantilever floor support plate outer edge line positioning precision control construction method, step one: according to design drawing to determine good floor area;Step two: find out the vertical distance of the irregular arc edge line of building outside to two cylindrical tangent;Step three: according to the size of cantilever floor support plate theory cantilever, the area of the size of cantilever that is too large is temporarily supported and reinforced, then construction site according to floor support plate layout, corresponding length floor support plate is installed to corresponding position;Step four: edge line positioning;Step five: edge mould installation;Step six: bolt welding;The present application improves the precision control of the size of irregular arc floor support plate outer edge line construction.

Description

Technical Field

[0001] This invention relates to the field of civil engineering, specifically to a construction method for controlling the positioning accuracy of the outer edge of an irregularly curved cantilevered floor slab. Background Technology

[0002] For the sake of design and shape, some steel structure buildings often use round tube columns for steel columns and the outer side of the building is often designed as an irregular arc. Steel truss floor decking or profiled steel sheet is one of the two most commonly used floor deckings in steel structure buildings, and its outer edge also needs to be made into a cantilevered arc shape according to the changes in the building shape.

[0003] Inaccurate control of the outer edge dimensions of the floor decking during on-site construction may significantly impact subsequent construction processes such as bricklaying and curtain wall installation. Modifying the outer edge of the already poured concrete floor slab is extremely inconvenient, and the repair quality is difficult to control. Therefore, controlling the installation accuracy of the outer edge of the floor decking before concrete pouring is of paramount importance.

[0004] The common method for controlling the dimensions of irregularly cantilevered curved floor decking is to have workers measure the cantilever length on-site and cut excess decking during construction, based on the cantilever length measured from the drawings. This method requires a steel beam as a reference, and the cantilever dimension is measured immediately after each decking is laid. If all decking is laid, there is no reference point for measuring the cantilever distance. This method is cumbersome, requiring workers to constantly alternate between laying and measuring, which significantly impacts the construction schedule. Secondly, this conventional method requires workers to cut the decking immediately after the cantilever dimension is measured and positioned, making it impossible for project managers to conduct spot checks beforehand. If the positioning dimension is off, the entire decking needs to be replaced and reinstalled, making quality control extremely difficult. This necessitates that the workers possess high technical skills and a strong sense of quality responsibility. Summary of the Invention

[0005] The present invention aims to overcome the defects of the prior art and provide a construction method for controlling the positioning accuracy of the outer edge of irregular arc-shaped cantilever floor slabs, thereby solving the problems of poor positioning accuracy of the outer edge of irregular arc-shaped cantilever floor slabs, cumbersome engineering operations, large workload, and difficulty in ensuring quality.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] A construction method for controlling the positioning accuracy of the outer edge line of an irregular arc-shaped cantilever floor slab, characterized by comprising the following steps:

[0008] Step 1: Determine the paving area based on the design drawings;

[0009] Step 2: Find the perpendicular distance from the irregular curved edge of the building's exterior to the tangent of the two steel columns;

[0010] Step 3: Based on the theoretical cantilever dimensions of the floor decking, provide temporary support and reinforcement for areas with excessive cantilever dimensions. Then, on the construction site, install the floor decking of the corresponding lengths into the appropriate positions according to the floor decking layout drawing.

[0011] Step 4: Edge positioning;

[0012] Step 5: Install the edge mold;

[0013] Step Six: Stud Welding;

[0014] Step 7: Insert a thin rope with a certain degree of elasticity into the end shims of all the round steel placed in place, and run it through the outer ring of the building. Then, ask the site management personnel to check the dimensions and conduct spot checks. After confirming that there are no errors, the workers can cut the floor deck and install the side formwork along the outer thin rope.

[0015] The construction method for controlling the positioning accuracy of the outer edge line of an irregular arc-shaped cantilever floor slab is characterized by the following steps: Step 1 is as follows: Draw the outer tangent lines of all adjacent steel columns in the outer ring in CAD, measure the length of all original tangent line segments, and find the midpoint of the tangent line segments.

[0016] Step two specifically involves: drawing perpendicular lines from the midpoint of the tangent to both ends at regular intervals, and finding the perpendicular distances;

[0017] Step four is as follows: Mark a point approximately 100mm higher than the floor slab on all the outer ring steel columns. On-site, use a thin rope with a certain degree of elasticity to wrap around the steel column once along the marked elevation, and then connect it to the next adjacent steel column, connecting the outer ring steel columns in sequence. Measure the length of the rope between two adjacent steel columns on-site and verify it with the length of the tangent line segment at the corresponding position in CAD. At the same time, mark the center point of the rope between two adjacent steel columns.

[0018] Step 5 is as follows: On site, use angle steel with a length not less than the distance between adjacent steel columns, make a hole in the center of one side, and make holes at a certain distance to both ends. After making the holes, insert the threaded round steel. Spot weld a washer to the end of the round steel and use two nuts to clamp the round steel and angle steel at the tail. The overhang distance from the angle steel to the end of the round steel corresponds one-to-one with the vertical distance from the irregular arc edge line to the tangent of the two steel columns in Step 2.

[0019] Step six is ​​as follows: Place the angle steel with the adjusted cantilever size of the round steel in the corresponding position along the direction of the thin rope, with the midpoint of the angle steel corresponding to the midpoint of the thin rope. The angle steel can be spot welded to the steel column for fixation.

[0020] The beneficial effects of this invention are as follows: As can be seen from the above technical solution, this application provides a construction method for controlling the positioning accuracy of the outer edge of an irregular arc-shaped cantilever floor slab. Compared with the current construction method, it reduces the need for multiple alternating operations of laying, measuring, and cutting the slab simultaneously. With this construction process, after the floor slab is laid, skilled personnel can perform the positioning work on the construction site, followed by cutting and installation of the edge formwork. This process has clear procedures, and personnel can be assigned tasks according to the technical requirements of different procedures on site. This improves the construction progress while ensuring the quality of the project.

[0021] The steps of this invention are simple and clear: slab laying, edge positioning, edge formwork installation, and stud welding. The reduced difficulty of each individual process facilitates the division of labor among on-site personnel. Quality and technical briefings can be conducted on key aspects of the construction process requirements for different steps, forming a continuous flow operation on-site, which can effectively improve the quality of engineering construction. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0023] Figure 1 A schematic diagram showing the distance between the outer edge of the building and the outer tangent of the steel column;

[0024] Figure 2 Schematic diagram for drilling holes in angle steel;

[0025] Figure 3 Schematic diagram for positioning round steel;

[0026] Figure 4 This is a diagram showing the location of the site. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0028] like Figure 1-4 As shown: A construction method for controlling the positioning accuracy of the outer edge of an irregular arc-shaped cantilever floor slab. The specific operation steps are as follows:

[0029] 1. Determine the slab area according to the design drawings, draw the outer tangent lines of all adjacent outer steel columns in CAD, measure the length of all original tangent segments, and find the midpoint of the tangent segments;

[0030] 2. Draw perpendicular lines from the midpoint of the tangent to both ends at regular intervals to find the perpendicular distance from the irregular arc edge of the outer side of the building to the tangent of the two steel columns;

[0031] 3. Based on the theoretical cantilever dimensions of the floor decking, temporary supports and reinforcements should be provided for areas with excessive cantilever dimensions. Then, on the construction site, the floor decking of the corresponding length should be installed in the appropriate positions according to the floor decking layout drawing.

[0032] 4. Mark a point approximately 100mm above the floor level on all outer ring steel columns. On-site, use a slightly elastic thin rope to wrap around the steel column once along the marked elevation, then connect it to the next adjacent steel column, and so on, connecting all the outer ring steel columns. Measure the length of the rope between adjacent steel columns on-site and verify it against the corresponding tangent length in the CAD drawing. Mark the center point of the rope between adjacent steel columns.

[0033] 5. On-site, use angle steel with a length not less than the distance between adjacent steel columns, make a hole in the center of one side, and make holes at a certain distance to both ends. After making the holes, insert threaded round steel. Spot weld a washer to the end of the round steel and use two nuts to clamp the round steel and angle steel at the tail. The overhang distance from the angle steel to the end of the round steel corresponds one-to-one with the vertical distance from the irregular arc edge line to the tangent of the two steel columns in step two.

[0034] 6. Place the angle steel with the adjusted cantilever size along the direction of the thin rope in the corresponding position, with the midpoint of the angle steel corresponding to the midpoint of the thin rope. The angle steel can be spot welded to the steel column for fixation.

[0035] 7. Insert a thin rope with a certain degree of elasticity into the end shims of all the round steel placed in place, and run it through the outer ring of the building. Then, ask the site management personnel to check the dimensions and conduct spot checks. After confirming that there are no errors, the workers can cut the floor deck and install the side formwork along the outer thin rope.

[0036] Using the construction method described in this application, management personnel can visually verify and accept the floor decking after its outer edge is positioned on-site. Cutting of the floor decking can only proceed after confirmation of accuracy. In contrast, traditional construction methods require management personnel to verify dimensions only after the entire floor decking has been positioned and cut. During the operation, it is difficult to visually and effectively inspect the positioning quality. If the final inspection reveals that the cantilever dimension is too small, the entire floor decking must be replaced, wasting materials and reducing work efficiency.

[0037] This invention is applicable to positioning any form of irregular edge, and the positioning accuracy can be changed by adjusting the spacing between adjacent round steel bars according to different construction quality requirements.

[0038] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A construction method for controlling the positioning accuracy of the outer edge line of an irregular arc-shaped cantilever floor slab, characterized in that... It includes the following steps: Step 1: Determine the slab area according to the design drawings; draw the outer tangent lines of all adjacent outer steel columns in CAD, measure the length of all outer tangent line segments, and find the midpoint of the tangent line segments; Step 2: Find the perpendicular distance from the irregular curved edge of the building's exterior to the tangent of the two steel columns; Step 3: Based on the theoretical cantilever dimensions of the floor decking, provide temporary support and reinforcement for areas with excessive cantilever dimensions. Then, on the construction site, install the floor decking of the corresponding lengths into the appropriate positions according to the floor decking layout drawing. Step 4: Edge Line Positioning; Step 4 specifically involves marking a point approximately 100mm higher than the floor slab on all the outer ring steel columns. On-site, use a thin, elastic rope to wrap around the steel column once along the marked elevation, then connect it to the next adjacent steel column, and so on, connecting the outer ring steel columns sequentially. Measure the length of the rope between two adjacent steel columns on-site and verify it against the length of the outer tangent segment at the corresponding position in the CAD file. At the same time, mark the center point of the rope between two adjacent steel columns. Step 5: On-site, using angle steel with a length not less than the distance between adjacent steel columns, make a hole in the center of one side and make holes at certain intervals at both ends. After making the holes, insert the threaded round steel. Spot weld a washer to the end of the round steel and use two nuts to clamp the round steel and angle steel together at the tail. The overhang distance from the angle steel to the end of the round steel corresponds one-to-one with the vertical distance from the irregular arc edge line to the tangent of the two steel columns in Step 2. Step Six: Stud Welding; Step Six specifically involves placing the angle steel with the adjusted cantilever size of the round steel in the corresponding position along the direction of the thin rope, aligning the midpoint of the angle steel with the midpoint of the thin rope, and spot welding the angle steel to the steel column for fixation. Step 7: Insert a thin rope with a certain degree of elasticity into the end shims of all the round steel placed in place, and run it through the outer ring of the building. Then, ask the site management personnel to check the dimensions and conduct spot checks. After confirming that there are no errors, the workers will cut the floor deck and install the side formwork along the outer thin rope.

2. The construction method for controlling the positioning accuracy of the outer edge line of an irregular arc-shaped cantilever floor slab according to claim 1, characterized in that: Step two is as follows: Draw perpendicular lines from the midpoint of the tangent to both ends at regular intervals, and find the perpendicular distance.

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