A deformation control device and construction method for large-span, high-strength steel secondary beam construction

Abstract

The application discloses a deformation control device and a construction method for large-span and high-strength steel secondary beam construction, the device comprises a secondary beam, a floor / roof floor support plate and a concrete layer which are sequentially arranged from bottom to top, a supporting rod is arranged below the secondary beam, a detachable bolt-type clamp is arranged between the supporting rod and the secondary beam, a pre-tightening force adjusting device is arranged between the supporting rod and the secondary beam, and a beam end connecting assembly and a supporting rod connecting assembly for connecting the pre-tightening force adjusting device are arranged at the two ends of the secondary beam and the bottom of the supporting rod respectively. The bolt-type clamp design is adopted, various secondary beam specifications can be compatible, good universality is achieved, conventional tool combinations are used for tensioning, the mounting and dismounting steps are effectively simplified, the device can be repeatedly used, the overall space occupation is small, a high supporting frame does not need to be arranged, and the construction of the structure below is not affected. The device is suitable for large-span and heavy-load building structures such as industrial floors and planting roofs, and has a good application prospect.

Description

Technical Field

[0001] This invention relates to the field of building steel structure technology, and in particular to a deformation control device and construction method for the construction of large-span, high-strength steel secondary beams. Background Technology

[0002] With the acceleration of urbanization and the improvement of people's living standards, building structural design is developing towards large column grids, large spans, large bays, and multi-functionality. In large-span, heavy-load buildings, the use of steel-concrete composite structures can fully utilize the material properties of steel and concrete, greatly improving the load-bearing performance of components / structures. However, since the composite beams have not yet formed their combined effect during the construction phase, relying solely on the steel beams themselves for load-bearing or stability will result in significant deflection, making deformation control during construction difficult. Currently, the deformation control of composite beams generally uses temporary support frames, which can only be erected after the cast-in-place concrete of the next floor slab has solidified, extending the entire construction period. These frames can only be dismantled after the current floor slab has cured, occupying a large amount of space, affecting the construction of related processes in the lower structure, and are also costly and cumbersome to install and dismantle.

[0003] Therefore, it is necessary to propose a deformation control device and construction method for the construction of large-span, high-strength steel secondary beams to address the above problems. Summary of the Invention

[0004] This invention provides a deformation control device and construction method for the construction of large-span, high-strength steel secondary beams, solving the problems of existing construction deformation control devices affecting the construction of the substructure, high cost, cumbersome installation and dismantling, and long construction period.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A deformation control device for the construction of long-span, high-strength steel secondary beams includes, from bottom to top, a secondary beam, a floor / roof deck slab, and a concrete layer. A strut is installed below the secondary beam, and a detachable pin-type clamp is installed between the strut and the secondary beam. A preload adjustment device is installed between the strut and the secondary beam. Beam end connection assemblies and strut connection assemblies for connecting the preload adjustment device are respectively installed at both ends of the secondary beam and at the bottom of the strut.

[0007] Furthermore, the pin-type clamp includes a left clamp and a right clamp, both of which include an upper clamping plate and a lower clamping plate. The ends of the two lower clamping plates are respectively provided with protrusions and grooves of matching shapes, which together form a pin-type structure.

[0008] Furthermore, the upper clamping plate is provided with threaded holes, and fastening bolts are provided in the threaded holes.

[0009] Further, the lower clamping plates are connected with vertical bottom plates, corresponding bolt holes are formed in the two vertical bottom plates, and connecting bolts are arranged in the bolt holes.

[0010] Further, the vertical bottom plates are rotationally connected with the support rods, and pin shaft holes for connection are formed in the vertical bottom plates.

[0011] Further, the beam end connecting assembly comprises a connecting plate fixed with the secondary beam, process holes are formed in the connecting plate, and a fixing device I connected with the tensioning device is arranged on the process holes.

[0012] Further, the support rod connecting assembly comprises an ear plate fixed at the bottom of the support rod, and a fixing device II connected with the tensioning device is arranged on the ear plate.

[0013] Further, the pre-tightening force adjusting device comprises a tensioning component, and a tensioning device for adjusting the pre-tightening force of the tensioning component is arranged on the tensioning component.

[0014] The construction method of the deformation control device for large-span and high-strength steel secondary beam construction comprises the following steps:

[0015] 1) installing the secondary beam and the connecting joint;

[0016] 2) placing left and right clamps on both sides of the lower flange of the secondary beam respectively, aligning the protrusions with the grooves, ensuring that the left and right clamps are tightly attached and locked with the lower end connecting bolts, and simultaneously tightening the upper end fastening bolts and nuts to tightly press the secondary beam;

[0017] 3) connecting one end of the tensioning component with the connecting plate through the fixing device I, and connecting the other end with the tensioning device;

[0018] 4) aligning and connecting the upper end of the support rod with the pin shaft hole of the bolt type clamp, and connecting the lower end with the tensioning component through the fixing device II;

[0019] 5) tensioning by using the tensioning device until the designed pre-tightening force is reached;

[0020] 6) pouring the concrete layer, and after final setting, removing the construction deformation control device, first relaxing the tension adjusting device to release the pre-tightening force of the tensioning component, and then sequentially disassembling the support rod connecting assembly, the beam end connecting assembly and the bolt type clamp.

[0021] In summary, the present application has the following beneficial effects:

[0022] (1) The bolt type clamp and the tensioning device can be quickly assembled and disassembled, greatly simplifying the assembly and disassembly steps, and the conventional tool combination can be used for tensioning, which can be repeatedly applied, reduces the construction cost, significantly shortens the construction period, and improves the construction efficiency;

[0023] (2) The thickness and the lower vertical plate of the bolt-type clamp are designed to be compatible with the thickness and width of various secondary beams, thus enhancing the versatility and adaptability of the device;

[0024] (3) The device does not need to be set on the lower floor, and can be set before the lower floor is solidified or poured, thus occupying a small space and not needing to set a high support frame, and not affecting the normal construction of the lower structure during the construction process. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front structure schematic view of the large-span combined secondary beam construction deformation control device.

[0026] Figure 2 It is an enlarged view of A of the large-span combined secondary beam construction deformation control device.

[0027] Figure 3 It is a left view of Figure 2 .

[0028] Figure 4 It is a left clamp and right clamp structure schematic view of the present application.

[0029] Figure 5 It is a top view of Figure 4 .

[0030] Label description: 1, secondary beam; 2, floor / roof floor support plate; 3, concrete layer; 4, bolt-type clamp; 5, support rod; 6, tensioning device; 7, beam end connecting assembly; 8, support rod connecting assembly; 41, left clamp; 42, right clamp; 43, thread; 44, fastening bolt; 45, nut; 46, connecting bolt; 71, connecting plate; 72, fixing device one; 73, tensioning part; 81, fixing device two; 82, ear plate; 411, left clamp upper clamp plate; 412, left clamp lower clamp plate; 413, left clamp vertical bottom plate; 421, right clamp upper clamp plate; 422, right clamp lower clamp plate; 423, right clamp vertical bottom plate; 711, process hole; 4121, protruding block; 4221, recess; 4131, bolt hole; 4132, pin hole. DETAILED DESCRIPTION

[0031] The specific embodiments of the deformation control device and construction method for large-span, high-strength steel secondary beam construction of the present application will be further described below in conjunction with the accompanying Figures 1 to 5

[0032] ​The application discloses a deformation control device for large-span high-strength steel secondary beam construction.

[0033] The left clamp 41 comprises a left clamp upper clamping plate 411, a left clamp lower clamping plate 412 and a left clamp vertical bottom plate 413, and the left clamp lower clamping plate 412 is provided with a rectangular protrusion 4121; the right clamp 42 comprises a right clamp upper clamping plate 421, a right clamp lower clamping plate 422 and a right clamp vertical bottom plate 423, and the right clamp lower clamping plate 422 is provided with a rectangular recess 4221 corresponding in size and position to the rectangular protrusion 4121 and forms a latch type structure with the protrusion 4121.

[0034] The left clamp upper clamping plate 411 and the right clamp upper clamping plate 421 are both provided with threaded holes 43 for fixing fastening bolts 44, and the lower flanges of the secondary beam 1 are clamped by simultaneously screwing the nuts 45 and the fastening bolts 44.

[0035] The left clamp vertical bottom plate 413 and the right clamp vertical bottom plate 423 are both provided with bolt holes 4131 and pin shaft holes 4132, the center lines of the bolt holes 4131 are on the same horizontal line, and the left clamp vertical bottom plate 413 and the right clamp vertical bottom plate 423 are locked and connected as a whole by the connecting bolts 44 and can be flexibly disassembled and used.

[0036] The latch type clamp 4 is provided with sufficient thickness and can be compatible with secondary beams 1 of various conventional sizes, and the latch type clamp 4 does not need to be tightly clamped in the width direction of the lower flanges of the secondary beam 1, but is tightly adhered to the left clamp 411 and the right clamp 421 as the connection standard.

[0037] The beam end connecting assembly 7 comprises a connecting plate 71, a fixing device one 72, the pre-tightening force adjusting device comprises a tensioning component 73 and a tensioning device 6 for tension adjustment, the connecting plate 71 is provided with process holes 711, and the connecting plate 71 is connected with the tensioning component 73 through the fixing device one 72.

[0038] The support rod connecting assembly 8 comprises a fixing device two 81 welded at the lower end of the support rod 5 and an ear plate 82, and the tensioning component 73 is connected with the ear plate 82 through the fixing device two 81.

[0039] The application further discloses a construction method of the deformation control device for large-span high-strength steel secondary beam construction.

[0040] 1) installing the secondary beam 1 and the connecting joint.

[0041] 2) Place the left clamp 41 and the right clamp 42 on both sides of the lower flange of the secondary beam 1, align the rectangular protrusion 4121 with the rectangular recess 4221, ensure that the left clamp 41 and the right clamp 42 are tightly locked with the lower end bolts 46, and at the same time, tighten the upper end fastening bolts 44 and the nuts 45 to tightly press the lower flange of the secondary beam 1.

[0042] 3) Connect one end of the tensioning component 73 with the connecting plate 71 through the fixing device 1 72, and connect the other end with the tensioning device 6.

[0043] 4) Align the pin shaft hole 4132 of the pin-type clamp 4 with the upper end of the strut 5, and connect the lower end of the strut 5 with the tensioning component 73 using the fixing device 2 81.

[0044] 5) Use the tensioning device 6 to gradually tension the tensioning component 73 until the designed pre-tightening force is reached.

[0045] 6) Pour the concrete layer 3, and after final setting, remove the construction deformation control device, first loosen the tensioning device 6 to release the pre-tightening force of the tensioning component 73, and then sequentially remove the strut connecting assembly 8, the beam end connecting assembly 7, and the pin-type clamp 4.

[0046] 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 that belongs to the idea of the present application falls within the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A deformation control device for the construction of large-span, high-strength steel secondary beams, characterized in that: The beam comprises a secondary beam, a floor / roof floor support plate and a concrete layer arranged in sequence from bottom to top, a support rod is arranged below the secondary beam, a detachable bolt type clamp is arranged between the support rod and the secondary beam, a pre-tightening force adjusting device is arranged between the support rod and the secondary beam, a beam end connecting assembly and a support rod connecting assembly for connecting the pre-tightening force adjusting device are arranged at the two ends of the secondary beam and the bottom of the support rod respectively; The bolt type clamp comprises a left clamp and a right clamp, the left clamp and the right clamp each comprise an upper clamp plate and a lower clamp plate, the two lower clamp plates are respectively provided with a protrusion and a groove matched in shape, and the two constitute a bolt type structure; The lower clamp plate is connected with a vertical bottom plate, corresponding bolt holes are formed in the two vertical bottom plates, and connecting bolts are arranged in the bolt holes.

2. The deformation control device for construction of large-span, high-strength steel secondary beam according to claim 1, characterized in that: A threaded hole is arranged in the upper clamp plate, and a fastening bolt is arranged in the threaded hole.

3. The deformation control device for construction of large-span, high-strength steel secondary beam according to claim 1, characterized in that: The vertical bottom plate is rotationally connected with the support rod, and a pin hole for connection is formed in the vertical bottom plate.

4. The deformation control device for construction of large-span, high-strength steel secondary beam according to claim 1, characterized in that: The beam end connecting assembly comprises a connecting plate fixed with the secondary beam, a process hole is formed in the connecting plate, and a fixing device one connected with a tensioning device is mounted on the process hole.

5. The deformation control device for construction of large-span, high-strength steel secondary beam according to claim 1, characterized in that: The support rod connecting assembly comprises an ear plate fixed at the bottom of the support rod, and the ear plate is connected with a fixing device two connected with the tensioning device.

6. The deformation control device for construction of a large-span, high-strength steel secondary beam according to claim 4 or 5, characterized in that: The pre-tightening force adjusting device comprises a tensioning component, and a tensioning device for adjusting the pre-tightening force of the tensioning component is arranged on the tensioning component.

7. The construction method of the deformation control device for the construction of a large-span, high-strength steel secondary beam according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: 1) installing the secondary beam and the connecting node; 2) placing the left and right clamps on both sides of the lower flange of the secondary beam respectively, aligning the protrusion and the groove, ensuring that the left and right clamps are tightly locked with the lower end connecting bolts, and simultaneously tightening the upper end fastening bolts and nuts to tightly press the secondary beam; 3) connecting one end of the tensioning component with the connecting plate through the fixing device one, and connecting the other end with the tensioning device; 4) aligning and connecting the upper end of the support rod with the pin hole of the bolt type clamp, and connecting the lower end of the support rod with the tensioning component using the fixing device two; 5) using the tensioning device to tension until the designed pre-tightening force is reached; 6) pouring the concrete layer, and after final setting, removing the construction deformation control device, first relaxing the tension adjusting device to release the pre-tightening force of the tensioning component, and then sequentially disassembling the support rod connecting assembly, the beam end connecting assembly and the bolt type clamp.

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