Fabricated assembling jig for bending and torsion sub-pieces of double-curved steel truss and net shell and assembling method thereof

Abstract

The application discloses a kind of double-curved steel truss and net shell bending-torsion piece assembly assembling jig and its assembling method, and the assembling jig includes a plurality of slide rails arranged in parallel, each slide rail is provided with a bottom beam movable relative to each other, the bottom beam is provided with height-adjustable column, and a plurality of height-adjustable columns are provided with top beam for connection.The application adopts slidable assembly jig, avoids the shortcomings of the prior art, and provides a new assembling method for bending-torsion piece unit.The jig slides in the slide rail through the bottom pulley, realizes rapid horizontal movement, greatly reduces the repeated installation, disassembly and handling work of the jig, realizes the repeated use and multi-layer stacking of the jig through the assembly method.In addition, different from the conventional assembling method of "first positioning the jig, then setting the height", the jig is assembled according to the method of "first setting the height, then positioning the jig", which avoids the problems of low efficiency and high cost caused by repeated production of the jig.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a kind of assembling of double-curved steel truss and net shell bending torsion piece and assembling jig and its assembling method. BACKGROUND

[0002] With the improvement of public aesthetic level, double-curved special-shaped steel structure is widely used in public building field.But double-curved structure modeling is complex, which brings more inconvenience to site construction.

[0003] When double-curved steel truss and net shell are constructed, the sub-pieces unit is first assembled on the ground.The sub-pieces unit composed of bending torsion members is mostly in space bending torsion posture, and the assembling and positioning are difficult.Two methods are commonly used for site assembling: (1) according to the design posture of bending torsion piece, setting adjustable vertical assembling jig at the port, midspan and other positions of main member, hoisting the members to the jig in sequence, and measuring and positioning the port and midspan of all members by total station instrument.(2) taking the plane formed by any three end points of bending torsion piece as projection plane, setting fixed stool-type assembling jig for assembling at the port, midspan and other positions of main member according to the posture after projection, and measuring and positioning by total station instrument.

[0004] When method one is used, the assembling jig is usually higher than 4m, the measure is large, the cost is high, the site occupation is serious, the construction organization is difficult, the worker operates in high place, the operation convenience is poor, the danger is high, and the precision is difficult to guarantee.When method two is used, the stool needs to be repeatedly produced according to the assembling state elevation of the supported member, the efficiency is low, and the labor cost is high.In the above two assembling methods, the position of jig needs to be moved and positioned for many times according to the position change of member end, the repeated work amount is great, the cost of assembling machinery and labor is wasted, and it is not conducive to the guarantee of construction period. SUMMARY

[0005] To solve the technical problems existing in the prior art, the present application provides a kind of assembling of double-curved steel truss and net shell bending torsion piece and assembling jig and its assembling method, which avoids the shortcomings of the existing double-curved steel truss and net shell piece assembling method, the jig can be reused and stacked, and the assembling efficiency is improved.

[0006] To achieve the above purpose, the present application adopts the following technical scheme: a kind of assembling of double-curved steel truss and net shell bending torsion piece and assembling jig, which comprises a plurality of parallel slide rails, each slide rail is provided with a bottom beam that can move relative to each other, the bottom beam is provided with a height-adjustable column, and a plurality of height-adjustable columns are provided with a top beam connected above.

[0007] Further, the height-adjustable column comprises an outer tube connected with the bottom beam, the outer tube is sleeved with an inner tube, the inner tube is provided with a plurality of uniformly spaced adjusting holes in the height direction, the top of the outer tube is provided with a fixing hole matched with the adjusting hole, and a connecting rod is arranged between the outer tube and the inner tube.

[0008] Further, a diagonal brace is arranged between the outer tube and the bottom beam.

[0009] Further, the bottom of the bottom beam is provided with a load-bearing caster matched with the slide rail, and the slide rail is provided with an anchor plate connected with the ground on both sides.

[0010] Further, a retainer is arranged at the load-bearing caster for fixation.

[0011] Further, the top beam is provided with a fixed clamping plate matched with the component.

[0012] Further, when a plurality of bending and torsion sub-pieces need to be stacked and spliced, height-adjustable columns, top beams and fixed clamping plates are added above the existing top beam. According to the splicing requirement, a set of height-adjustable columns, top beams and fixed clamping plates can be directly added on the top beam, which is simple to assemble and reduces the construction difficulty.

[0013] The assembled jig comprises a slide rail, an anchor plate, a load-bearing caster, a bottom beam, an inner tube of a height-adjustable column, an outer tube, a diagonal brace, a top beam, a fixed clamping plate and a rubber retainer. The slide rail is a C-shaped channel steel, which is laid on the hardened ground along the length direction of the structure sub-unit, and is fixed to the ground by expansion bolts. A single jig is provided with an H-shaped steel bottom beam in a single slide rail, which is parallel to the slide rail. Load-bearing casters are arranged below both ends of the bottom beam, and box-type height-adjustable columns are arranged above the midspan of the bottom beam, which are connected by bolts. The height-adjustable column is composed of an inner tube and an outer tube, the side wall of the inner tube is arranged with adjusting holes (through bolt holes) at equal intervals, the top side of the outer tube is provided with a fixing hole (through hole), and the inner and outer tubes are connected by a screw rod; by adjusting the hole position of the inner and outer tubes, the length of the column is adjusted.

[0014] When the height of the outer tube is high, the top side of the outer tube and the upper surface of the beam at both ends can be connected by square tube inclined struts with bolts. The height of the two sliding rails can be adjusted, and the inner tube top of the column is provided with a H-shaped steel top beam connection, which can form a horse stool type jig. By rolling in the sliding rail through the casters, the jig can be moved horizontally along the sliding rail to the lofting position, and fixed by setting rubber stoppers at the casters. The bending and torsion segment unit main component directly falls on the top beam, and is fixed by using bolted fixing clamps after positioning and measurement. When the next segment unit needs to be assembled, remove the rubber stopper and the fixing clamp, move the jig to the lofting point, then hoist the component to the jig, and finally measure and temporarily fix it. When multiple bending and torsion segments need to be stacked, a set of height-adjustable columns, top beams and fixing clamps can be added above the existing top beam.

[0015] The assembling method of the assembling jig for assembling the hyperbolic steel truss and the bending and torsion segment of the net shell comprises the following steps:

[0016] 1) with the bending and torsion segment unit

[0017] The plane formed by the lowest points of the three ports is used as the projection reference surface, and the three-dimensional model of the segment unit in the assembling posture is obtained by rotating in CAD;

[0018] 2) in the CAD side view angle, move the reference surface down 500mm as the ±0m line of the ground assembly, that is, the reference line;

[0019] 3) estimate 6m for each jig interval, 6m is an empirical value, which can be adjusted according to the specific project, and one segment is between two jigs. Divide the segment length L by 6, then divide by 2 and round up to get the number of half segments n. Divide the segment sag h by n, and round down to the nearest multiple of 50mm to get the height difference modulus△h of the jig;

[0020] 4) the highest point of the lower surface of the segment unit is rounded down to the nearest multiple of 50mm to get the highest jig elevation Hmax. Move the reference line up by Hmax, Hmax-△h, Hmax-2△h……Hmax-n△h, and the intersection position of the lower surface of the segment unit component is the jig point. Mark the jig height H and the distance S to the end of the reference line to complete the drawing of the jig layout;

[0021] 5) set the sliding rail along the length direction of the segment unit on the hardened ground, and connect the sliding rail with the ground by expansion bolts. Slide 2n+2 jigs into the sliding groove along the end of the sliding rail;

[0022] 6) adjust the column height and positioning according to the height H and the distance S to the end of each jig in the jig layout;

[0023] 7) after the jig is positioned, place the rubber stopper at the load-bearing caster to fix the jig;

[0024] 8) According to the order of first main and then second, hoist the component of the bending-torsion sub-piece, the component falls on the jig frame, and a fixed clamping plate is used for fixing;

[0025] 9) After completing the assembly work of the current bending-torsion sub-piece unit, the jig frame can be removed, and the steps 6) to 8) are repeated

[0026] 8), the assembly of the subsequent sub-piece unit is completed.

[0027] The present application adopts a slidable assembled horse stool type assembly jig frame, avoids the shortcomings of the existing double-curvature steel truss and net shell sub-piece unit assembly method, and provides a novel bending-torsion sub-piece unit assembly method. The jig frame slides in the slide rail through the bottom pulley, realizes rapid horizontal movement, greatly reduces the repeated installation, disassembly and transportation work of the jig frame, realizes the reuse and multi-layer stacking of the jig frame through the assembled assembly method. In addition, unlike the conventional assembly method of "first positioning the jig frame, and then positioning the height", the assembly is carried out according to the method of "first positioning the height, and then positioning the position", which avoids the problems of low efficiency and high cost caused by repeated production of the jig frame. Compared with the prior art, the present application has the following beneficial effects:

[0028] (1) strong implementability;

[0029] (2) The horse stool type jig frame has low height, small amount of measurement, high assembly rate, can be recycled, and has high overall economy;

[0030] (3) Ground assembly operation, high safety, and more controllable precision;

[0031] (4) The jig frame moves horizontally conveniently, and the height of the jig frame does not need to be repeatedly adjusted, so that the construction efficiency is high;

[0032] (5) Easy to stack, small site occupation, and convenient construction organization. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is an assembly jig frame arrangement for the embodiment of the present application;

[0034] Figure 2 It is a top view of the assembly jig frame of the embodiment of the present application;

[0035] Figure 3 It is a side view of the assembly jig frame of the embodiment of the present application;

[0036] Figure 4 It is a front view of the assembly jig frame of the embodiment of the present application;

[0037] Figure 5 It is a front view of the assembly jig frame when stacking in the embodiment of the present application. DETAILED DESCRIPTION

[0038] Reference Figures 1-5Further description is made to the specific embodiment of the assembling jig and assembling method of the double-curved steel truss and net shell bending-torsion segment of the present application.

[0039] The assembling jig 2 of the double-curved steel truss and net shell bending-torsion segment comprises slide rails 6, anchor plates 7, load-bearing casters 8, bottom beams 9, diagonal braces 10, height-adjustable column outer pipes 11, height-adjustable column inner pipes 12, through-bolt 13, top beams 14, fixed clamping plates 15 and rubber stoppers 16. The slide rails 6 are C-shaped channel steels laid on the hardened ground 1 along the length direction of the segment, and are fixed at the anchor plates 7 by expansion bolts and the ground 1. An H-shaped steel bottom beam 9 is arranged in each slide rail 6, and is parallel to the slide rail 6. Box-shaped height-adjustable columns are arranged above the middle of the bottom beam 9, and load-bearing casters 8 are arranged below the two ends of the bottom beam 9. The above-mentioned components are connected by bolts. The height-adjustable column is composed of an inner pipe 12 and an outer pipe 11. The inner pipe 12 is uniformly arranged with through-bolt holes at intervals of 100 mm on four sides. The outer pipe 11 is provided with a through-bolt hole at the top. The inner pipe 12 and the outer pipe 11 are connected by the through-bolt 13. The length of the column can be adjusted by adjusting the connection hole positions of the outer pipe 11 and the inner pipe 12. When the height of the outer pipe 11 is high, the outer pipe 11 and the top surface of the two ends of the bottom beam 9 can be connected by bolted square tubes 10. The top beams 14 are arranged on the top of the inner pipes 12 of the two slide rails 6 to connect them, thereby forming a horse stool type jig 2. The jig 2 can move horizontally along the slide rails 6 by rolling in the slide rails 6 through the load-bearing casters 8, and is fixed by the rubber stoppers 16 arranged at the load-bearing casters 8 after reaching the lofting position. The main components 3 of the bending-torsion segment unit are directly placed on the top beams 14, and are fixed by the bolted fixed clamping plates 15 after positioning and measuring. When the next segment unit needs to be assembled, the rubber stoppers 16 are removed, the jig 2 is moved to the lofting point, the components 3 are hoisted to the jig 2, and finally the positioning and temporary fixing are performed. When multiple bending-torsion segments 3 need to be stacked and assembled, a set of height-adjustable column outer pipes 11, inner pipes 12, top beams 14 and fixed clamping plates 15 are added above the existing top beams 14.

[0040] The assembling method of the steel truss and net shell bending-torsion segment unit 3 using the above-mentioned assembling jig comprises the following steps:

[0041] 1) Obtain the three-dimensional model of the assembling posture of the bending-torsion segment unit 3. First, take the plane formed by the lowest points of the three ports of the segment unit 3 as the projection reference surface. Then rotate the segment unit 3 in CAD, and the three-dimensional model of the assembling posture can be obtained.

[0042] 2) Draw the reference line. In the CAD side view angle, move the reference surface down by 500 mm (the minimum requirement for the height of the butt welding operation is about 500 mm) as the elevation ±0 m line during assembly, that is, the reference line, that is, the hardened ground 1.

[0043] 3) Calculate the number of grids n of half of the unit 3 and the height difference modulus △h of the rack 2. Firstly, the gap between two adjacent racks 2 is defined as a grid. Secondly, divide the length L of the unit 3 by 6m (6m is an empirical value, which can be adjusted according to the specific project), then divide by 2 and take the upper integer to get the number of grids n of half of the unit 3. Then, divide the height h of the unit 3 by n and take the lower integer to the multiple of 50mm to get the height difference modulus △h of the rack 2.

[0044] 4) Draw the rack arrangement drawing. Firstly, take the elevation of the highest point of the lower surface of the unit 3 to the lower integer to the multiple of 50mm to get the highest rack elevation Hmax. Secondly, offset the reference line by Hmax, Hmax-△h, Hmax-2△h, …, Hmax-n△h respectively, and the intersection point of the offset straight line and the lower surface of the unit 3 component is the rack arrangement point. Then, label the distance 4 and the height 5 from each rack 2 to the end of the reference line, which completes the drawing of the rack arrangement drawing.

[0045] 5) Lay and fix the slide rail 6. Lay the slide rail 6 along the length direction of the unit 3 on the hardened ground 1, and fix the slide rail 6 at the anchor plate 7 by expansion bolts and the ground 1.

[0046] 6) Assemble the rack 2. Assemble from bottom to top. Firstly, connect two load casters 8 and a bottom beam 9 firmly by bolts. Secondly, connect the outer column pipe 11 and the bottom beam 9 firmly by bolts. Thirdly, connect two inclined braces 10, the bottom beam 9 and the outer column pipe 11 firmly by bolts. Then, connect the through screw rod 13 into the corresponding hole positions of the outer column pipe 11 and the inner column pipe 12 firmly. After that, connect a top beam 14 and two inner column pipes 12 firmly by bolts. Finally, repeat operation 6 to complete the assembly of all racks.

[0047] 7) Slide 2n+2 racks 2 into the slide groove along the end of the slide rail 6 in turn.

[0048] 8) Rack horizontal positioning and height adjustment. Firstly, according to the distance 4 of each rack 2 to the end of the reference line in the rack arrangement drawing, manually push each rack 2 to the corresponding position on the drawing, and fix the rubber stopper 16 at the load caster 8. Then, according to the height 5 of each rack 2, adjust the rack height by adjusting the hole position of the screw rod 13 in the inner column pipe 12.

[0049] 9) Component assembly and temporary fixation. Firstly, hoist the components of the unit 3 in the order of main first and then secondary. After the components fall on the rack 2, use the total station instrument to correct. Then, place two fixed clamping plates 16 on the flange plate of the top beam 14 on both sides of the components, and tighten the nuts after close contact with the components to complete the fixation.

[0050] 10) After the assembling of the current bending and torsion sub-unit 3 is completed, the mold is removed, and the above steps 8) ~ 9) are repeated to assemble the subsequent sub-unit.

[0051] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A method for assembling a double-curved steel truss and a bending-torsion segment of a lattice shell, characterized in that the assembling jig comprises a plurality of slide rails arranged in parallel, each of the slide rails is provided with a bottom beam capable of moving relative to the slide rail, the bottom beam is provided with height-adjustable columns, a plurality of the height-adjustable columns are provided above the bottom beam and connected by a top beam, and the top beam is provided with fixed clamping plates for cooperating with components. The method comprises the following steps: 1) taking a plane formed by the lowest points of three ports of the bending-torsion segment unit as a projection reference plane, and rotating the segment unit in CAD to obtain a three-dimensional model in the assembling posture; 2) in the CAD side view, moving the reference plane downward by 500 mm as the ground assembling ±0 m line, i.e., the reference line; 3) estimating the interval between each jig as 6 m, which is an empirical value, one segment is between two jigs, dividing the segment length L by 6 and then by 2 and rounding up to obtain the number n of half segments, dividing the segment height h by n and rounding down to the nearest multiple of 50 mm to obtain the height difference modulus Δh of the jig; 4) rounding down the elevation of the highest point on the lower surface of the segment unit to the nearest multiple of 50 mm to obtain the highest jig elevation Hmax, and translating the reference line upward by Hmax, Hmax-Δh, Hmax-2Δh, …, Hmax-nΔh, and the intersection position between the lower surface of the segment unit and the reference line is the jig point, and the jig height H and the distance S to the end of the reference line are marked to complete the drawing of the jig layout; 5) arranging the slide rails along the length direction of the segment unit on the hardened ground, connecting the slide rails to the ground by expansion bolts, and sliding 2n+2 jigs into the slide grooves along the end of the slide rail; 6) adjusting the height and position of the column according to the height H and the distance S to the end of the reference line in the jig layout; 7) after the jig is positioned, placing a rubber retainer at the load-bearing caster to fix the jig; 8) hoisting the components of the bending-torsion segment in the order of main first and then secondary, and fixing the components on the jig using the fixed clamping plate; 9) after completing the assembly of the current bending-torsion segment unit, the jig can be removed, and the above steps 6) to 8) are repeated to complete the assembly of the subsequent segment unit. The height-adjustable column comprises an outer tube connected to the bottom beam, an inner tube sleeved in the outer tube, a plurality of evenly spaced adjustment holes arranged in the height direction of the inner tube, a fixed hole arranged at the top of the outer tube and matched with the adjustment hole, and a connecting rod arranged between the outer tube and the inner tube.

2. The assembling method of assembling the assembling jig of the double-curvature steel truss and the bending-torsion sub-piece of the space grid according to claim 1, characterized in that: An inclined brace is arranged between the outer tube and the bottom beam.

3. The assembling method of assembling the assembling jig of the double-curvature steel truss and the bending-torsion sub-piece of the space grid according to claim 2, characterized in that: A load-bearing caster is arranged at the bottom of the bottom beam and matched with the slide rail, and anchor plates for connecting with the ground are arranged on both sides of the slide rail.

4. The assembling method of assembling the assembling jig of the double-curvature steel truss and the bending-torsion sub-piece of the space grid according to claim 1, characterized in that: A retainer is arranged at the load-bearing caster for fixation.

5. The assembling method of assembling the assembling jig of the double-curvature steel truss and the bending-torsion sub-piece of the space grid according to claim 4, characterized in that: When multiple bending-torsion segments need to be stacked and assembled, height-adjustable columns, top beams and fixed clamping plates are added above the existing top beam.

6. The assembling method of assembling the assembling jig of the double-curvature steel truss and the bending-torsion sub-piece of the net shell according to claim 1, characterized in that: ​

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