A support-free laminated slab joint structure, construction method and construction equipment

Abstract

The application discloses a kind of free support type laminated slab joint structure, construction method and construction equipment.The laminated slab joint structure includes bottom form board, is set to the joint below of two adjacent laminated slab, and the two ends of the bottom form board are respectively with the bottom of two laminated slab detachably connected;Elastic pressing plate, is set to the joint above of two adjacent laminated slab, and the two ends of the elastic pressing plate are respectively with the top of two laminated slab detachably connected;At least one tension bolt, is threaded in the bottom form board and the elastic pressing plate, to be used for limiting the relative position of the bottom form board and elastic pressing plate and the two laminated slab.The laminated slab joint structure can be used as joint form board without lower support during laminated slab construction process, saves lower formwork process, saves cost, saves construction period;And, flexible arrangement, portable, can be convenient for construction and transportation;In addition, it can be removed after construction is completed, so that recycling can be used.

Description

A support-free composite slab joint structure, construction method and construction equipment Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a support-free composite slab joint structure, construction method and construction equipment. Background Technology

[0002] With the promotion of prefabricated buildings, formwork is often needed between prefabricated composite slabs during construction. The traditional approach is to erect a support frame at the joint, set up formwork below the joint, and then reinforce it. Alternatively, wire can be threaded through the formwork and then tied to the reinforcing steel bars of the composite slab.

[0003] Currently, in the construction of prefabricated building slabs, the following are common methods for reinforcing suspended formwork:

[0004] The first method involves using steel pipes to erect scaffolding, and then using formwork in conjunction with adjustable lifting heads to support the formwork and achieve reinforcement. This reinforcement method is labor-intensive and requires a large amount of reusable materials such as steel pipes and fasteners. Insufficient reinforcement may cause formwork bulging and grout leakage.

[0005] The second method is to pass a wire through the formwork and then tie the wire to the reinforcing steel bars of the composite slab to achieve the purpose of reinforcement. However, this reinforcement method is simple, and if the reinforcement is not in place, it will still cause the formwork to bulge and leak grout. Summary of the Invention

[0006] The primary technical problem to be solved by this invention is to provide a support-free composite plate joint structure.

[0007] Another technical problem to be solved by the present invention is to provide a construction method for joints of composite slabs without support.

[0008] Another technical problem to be solved by the present invention is to provide a building construction equipment.

[0009] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0010] According to a first aspect of the present invention, a support-free composite slab joint structure is provided, comprising:

[0011] A bottom template is set below the joint of two adjacent composite slabs, and both ends of the bottom template are detachably connected to the bottom of the two composite slabs respectively.

[0012] An elastic pressure plate is disposed above the joint between two adjacent laminated plates, and both ends of the elastic pressure plate are detachably connected to the top of the two laminated plates respectively.

[0013] At least one tie bolt is inserted through the bottom template and the elastic pressure plate to limit the relative position of the bottom template and the elastic pressure plate with respect to the two composite plates.

[0014] Furthermore, the bottom template includes galvanized steel sheet and reinforcing angle steel;

[0015] The top of the galvanized steel sheet is attached to the bottom of two adjacent laminated plates, and the reinforcing angle steel is fixed to the bottom of the galvanized steel sheet to enhance the structural strength of the galvanized steel sheet.

[0016] Furthermore, the two ends of the top of the galvanized steel sheet are respectively glued to the bottom of two adjacent laminated plates;

[0017] Alternatively, the two ends of the top of the galvanized steel sheet can be detachably connected to the bottom of two adjacent laminated plates.

[0018] Furthermore, both ends of the elastic pressure plate are connected to the top of the two composite plates by support bolts.

[0019] Furthermore, the support bolt includes:

[0020] A support screw is disposed on the laminated plate, and the top end of the support screw protrudes from the top of the laminated plate;

[0021] A support pad is fitted onto the support screw and pressed against the top of the composite plate; wherein, both ends of the elastic pressure plate are provided with through holes, and the elastic pressure plate is fitted onto the support screw and pressed against the support pad.

[0022] An adjusting nut, threaded onto the support screw, is used to move closer to or further away from the washer by rotation, thereby tightening or loosening the end of the elastic pressure plate.

[0023] Furthermore, the composite plate joint structure includes a plurality of tie bolts, and the plurality of tie bolts are arranged in a preset shape; wherein the preset shape includes at least a straight line, a circle, a triangle or a polygon.

[0024] Furthermore, the center of the elastic pressure plate is recessed to form a concave portion, which faces the joint between the two adjacent composite plates, so that the lower surface of the elastic pressure plate extends beyond the finished surface of the cast-in-place concrete of the composite plate.

[0025] According to a second aspect of the present invention, a method for constructing a supportless composite slab joint is provided, comprising:

[0026] After the composite slabs are erected, the bottom template is attached to the bottom of the joint between two adjacent composite slabs, and the two ends of the bottom template are respectively attached to the bottom of the two adjacent composite slabs.

[0027] Place the elastic pressure plate above the joint of two adjacent laminated plates, and connect and fix the two ends of the elastic pressure plate to the top of the two adjacent laminated plates respectively;

[0028] The bottom template and the elastic pressure plate are pressed and fixed by tie bolts to limit the relative position of the bottom template and the elastic pressure plate with respect to the two stacked plates;

[0029] Reinforcing bars are tied at the joint, and the reinforcing bars are tied together where they meet the tie bolts;

[0030] After the reinforcing bars are tied, pour the concrete.

[0031] Once the concrete reaches its designed strength, remove the elastic pressure plate and the bottom formwork to complete the construction.

[0032] Furthermore, it also includes:

[0033] Determine whether the protruding part of the tie bolt extends beyond the building surface. If it does, cut it off with a cutting machine; if it does not extend beyond the surface, no action is required.

[0034] According to a third aspect of the present invention, a building construction device is provided, including the above-described composite slab joint structure.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The composite slab joint structure in the embodiments of the present invention can serve as a joint template during the construction of composite slabs without the need for lower support, thus saving the lower formwork process, reducing the amount of lower formwork work, saving costs, and saving construction time, especially at high formwork locations.

[0037] 2. The composite plate joint structure in the embodiments of the present invention is flexible and lightweight, which facilitates construction and transportation.

[0038] 3. The composite slab joint structure in the embodiments of the present invention can be removed after the concrete reaches its strength, thus enabling recycling. Attached Figure Description

[0039] Figure 1 is a structural schematic diagram of the support-free composite plate joint structure provided in the first embodiment of the present invention;

[0040] Figure 2 is a front view of the composite plate joint structure in use according to the first embodiment of the present invention;

[0041] Figure 3 is a top view of the composite plate joint structure in use according to the first embodiment of the present invention;

[0042] Figure 4 is a bottom view of the composite plate joint structure of the first embodiment of the present invention in use;

[0043] Figure 5 is a flowchart of a construction method for a support-free composite slab joint according to the second embodiment of the present invention.

[0044] In the accompanying drawings, the reference numerals indicate:

[0045] 1. Base formwork; 11. Galvanized steel sheet; 12. Reinforcing angle steel; 101. Double-sided adhesive tape;

[0046] 2. Elastic pressure plate; 21. Recess;

[0047] 3. Tie bolt; 31. Tie rod; 32. Upper washer; 33. Lower washer; 34. Upper nut; 35. Lower nut;

[0048] 10. Composite plate; 20. Joint; 30. Support bolt; 301. Support screw; 302. Support washer; 303. Adjusting nut. Detailed Implementation

[0049] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0050] <First Embodiment>

[0051] As shown in Figure 1, a support-free composite slab joint structure provided in the first embodiment of the present invention includes a bottom template 1, an elastic pressure plate 2, and at least one tie bolt 3. The bottom template 1 and the elastic pressure plate 2 are sandwiched on both sides of the joint between two adjacent composite slabs and are fixed by the tie bolt 3, thereby eliminating the need for lower support during composite slab construction and saving on the lower formwork process.

[0052] As shown in Figures 2 to 4, the bottom template 1 is positioned below the joint 20 of two adjacent composite slabs 10, and both ends of the bottom template 1 are detachably connected to the bottom of the two composite slabs 10. Specifically, as shown in Figure 1, in this embodiment, the bottom template 1 includes a galvanized steel plate 11 and a reinforcing angle steel 12. The galvanized steel plate 11 has a rectangular plate structure, and both ends of the top of the galvanized steel plate 11 are respectively attached to the bottom of the two adjacent composite slabs 10 using double-sided adhesive 101; the reinforcing angle steel 12 is L-shaped and is fixed to the bottom of the galvanized steel plate 11 to enhance the structural strength of the galvanized steel plate 11 and improve the stability of the support.

[0053] It is understood that the specific structural form of the galvanized steel plate 11 and the reinforcing angle steel 12 in this embodiment is only one implementation method. In other embodiments, the structure of the bottom template 1 can be adapted as needed. In addition, the galvanized steel plate 11 and the reinforcing angle steel 12 can be integrally formed, or they can be connected and fixed by welding. Alternatively, the galvanized steel plate 11 and the reinforcing angle steel 12 can be a separate structure, and the galvanized steel plate 11 and the reinforcing angle steel 12 can be pressed and fixed by tie bolts 3.

[0054] As shown in Figure 2, the elastic pressure plate 2 is disposed above the joint 20 of two adjacent composite plates 10, and both ends of the elastic pressure plate 2 are detachably connected to the tops of the two composite plates 10. Specifically, as shown in Figure 1, in this embodiment, both ends of the elastic pressure plate 2 are connected to the tops of the two composite plates 10 by support bolts 30. The support bolts 30 include a support screw 301, a support washer 302, and an adjusting nut 303. Specifically, the support screw 301 is embedded in the composite plate 10, and the top end of the support screw 301 protrudes from the top of the composite plate 10. The support washer 302 is sleeved on the support screw 301 and pressed against the top of the composite plate 10. Both ends of the elastic pressure plate 2 have through holes, and the elastic pressure plate 2 is sleeved on the support screw 301 and pressed against the support washer 302. The adjusting nut 303 is threaded onto the support screw 301, and moves closer to or further away from the support washer 302 by rotation, thereby tightening or loosening the end of the elastic pressure plate 2. During installation, first, the support washer 302 is fitted onto the support screw 301. Then, the elastic pressure plate 2 is installed onto the support screw 301 through the through hole. Finally, the adjusting nut 303 is used to tighten and fix the end of the elastic pressure plate 2.

[0055] Furthermore, in the above embodiment, the elastic pressure plate 2 has a central recess forming a concave portion 21, which faces the joint 20 of two adjacent composite slabs, so that the lower surface of the elastic pressure plate 2 extends beyond the finished surface of the cast-in-place concrete of the composite slab. It is understood that the elastic pressure plate 2 in this embodiment is Z-shaped; in other embodiments, the elastic pressure plate 2 can also be structurally adjusted as needed, as long as it has suitable rigidity and the concave portion 21 is maintained.

[0056] As shown in Figure 2, tie bolts 3 are inserted through the bottom template 1 and the elastic pressure plate 2 to limit the relative positions of the bottom template 1 and the elastic pressure plate 2 with the two overlapping plates 10. Specifically, as shown in Figure 1, in this embodiment, the tie bolts 3 include a tie rod 31, an upper washer 32, a lower washer 33, an upper nut 34, and a lower nut 35. The tie rod 31 is inserted through the bottom template 1 and the elastic pressure plate 2, with both ends of the tie rod 31 protruding from the bottom of the bottom template 1 and the top of the elastic pressure plate 2, respectively. The upper washer 32 is fitted onto the tie rod 31 and pressed against the top of the elastic pressure plate 2. The lower washer 33 is fitted onto the tie rod 31 and located at the bottom of the bottom template 1. The upper nut 34 is threaded onto the tie rod 31 to move closer to or away from the upper washer 32 by rotation. The lower nut 35 is threaded onto the tie rod 31 to move closer to or away from the lower washer 33 by rotation. Furthermore, in this embodiment, there are two tie bolts 3, which are arranged in a straight line. It is understood that in other embodiments, there may be three or more tie bolts 3, and the multiple tie bolts 3 can be arranged in a preset shape as needed, such as a circle, triangle, or polygon.

[0057] In summary, the support-free composite slab joint structure provided in the first embodiment of the present invention has the following beneficial effects:

[0058] 1. The composite slab joint structure in the embodiments of the present invention can serve as a joint template during the construction of composite slabs without the need for lower support, thus saving the lower formwork process, reducing the amount of lower formwork work, saving costs, and saving construction time, especially at high formwork locations.

[0059] 2. The composite plate joint structure in the embodiments of the present invention is flexible and lightweight, which facilitates construction and transportation.

[0060] 3. The composite slab joint structure in the embodiments of the present invention can be removed after the concrete reaches its strength, thus enabling recycling.

[0061] <Second Embodiment>

[0062] As shown in Figure 5, based on the first embodiment, the second embodiment of the present invention provides a construction method for a support-free composite slab joint, specifically including steps S1-S6:

[0063] S1: Paste the bottom template 1.

[0064] Specifically, the galvanized steel plate 11 and the reinforcing angle steel 12 are welded and fixed in advance. After the composite plate 10 is erected, the two ends of the top surface of the galvanized steel plate 11 are respectively glued to the bottom of the two adjacent composite plates 10 with double-sided adhesive.

[0065] S2: Install elastic pressure plate 2.

[0066] Specifically, the support washer 302 is first fitted onto the support screw 301 to provide a support base for the elastic pressure plate 2; then, the elastic pressure plate 2 is installed on the support screw 301 through the through hole, so that the end of the elastic pressure plate 2 presses against the support washer 302; finally, the end of the elastic pressure plate 2 is pressed and fixed using the adjusting nut 303. Thus, both ends of the elastic pressure plate 2 can be installed and fixed in the same way.

[0067] It is understandable that steps S1 and S2 are not sequential; they can be installed in sequence or by multiple people working together to install them simultaneously.

[0068] S3: Tighten and fix.

[0069] Specifically, after the bottom template 1 and the elastic pressure plate 2 are installed and fixed respectively, the bottom template 1 and the elastic pressure plate 2 are pressed and fixed by the tie bolts 3 to limit the relative position of the bottom template 1 and the elastic pressure plate 2 with the two composite plates 10.

[0070] S4: Binding reinforcing bars.

[0071] Specifically, reinforcing bars are tied at joint 20 and tied together with tie bolts 3 at the point where they meet to improve the overall stability of the composite slab joint structure.

[0072] S5: Pouring concrete.

[0073] Specifically, after the reinforcing bars are tied, concrete is poured within the joint 20mm.

[0074] S6: Removal of the formwork structure.

[0075] Specifically, after the concrete is poured, it is left to stand for a period of time until the concrete reaches the design strength. Then, the upper nut 34 and the lower nut 35 are unscrewed, so that the elastic pressure plate 2 and the bottom formwork 1 can be removed for the next use.

[0076] S7: Excess material removed.

[0077] Specifically, after the formwork structure is removed, the tie rod 21 will remain in the concrete. At this time, it is necessary to determine whether the protruding part of the tie rod 21 exceeds the building surface. If it does, it will be cut off with a cutting machine; if it does not exceed, no treatment is required.

[0078] It is understandable that step S7 only exists when it is necessary to cut the tie rod 21; when no cutting operation is required, step S7 does not exist.

[0079] <Third Embodiment>

[0080] Based on the first embodiment described above, the third embodiment of the present invention also provides a building construction equipment, which includes the above-described composite slab joint structure.

[0081] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A support-free composite slab joint structure, characterized in that, include: A bottom formwork is positioned below the joint between two adjacent composite slabs, with both ends of the bottom formwork detachably connected to the bottom of each of the two composite slabs. An elastic pressure plate is positioned above the joint between two adjacent composite slabs, with both ends of the elastic pressure plate detachably connected to the top of each of the two composite slabs. The elastic pressure plate has a recessed center, forming a concave portion facing the joint between the two adjacent composite slabs, so that the lower surface of the elastic pressure plate extends beyond the finished surface of the cast-in-place concrete of the composite slab. At least one tie bolt passes through the bottom formwork and the elastic pressure plate to limit the relative position of the bottom formwork and the elastic pressure plate to the two composite slabs.

2. The support-free composite slab joint structure as described in claim 1, characterized in that, The bottom template includes a galvanized steel plate and reinforcing angle steel; the top of the galvanized steel plate is attached to the bottom of two adjacent composite plates, and the reinforcing angle steel is fixed to the bottom of the galvanized steel plate to enhance the structural strength of the galvanized steel plate.

3. The support-free composite slab joint structure as described in claim 2, characterized in that, The two ends of the top of the galvanized steel sheet are respectively glued to the bottom of the two adjacent composite plates.

4. The support-free composite slab joint structure as described in claim 1, characterized in that, The two ends of the elastic pressure plate are respectively connected to the top of the two composite plates by support bolts.

5. The support-free composite slab joint structure as described in claim 4, characterized in that, The support bolt includes: a support screw, disposed on the composite plate, with the top end of the support screw protruding from the top of the composite plate; a support washer, sleeved on the support screw and pressed against the top of the composite plate; wherein, both ends of the elastic pressure plate have through holes, and the elastic pressure plate is sleeved on the support screw and pressed against the support washer; and an adjusting nut, threadedly connected to the support screw, so as to move closer to or further away from the support washer by rotation, thereby tightening or loosening the end of the elastic pressure plate.

6. The support-free composite slab joint structure as described in claim 1, characterized in that, The composite plate joint structure includes multiple tie bolts, and the multiple tie bolts are arranged in a preset shape; wherein, the preset shape is a straight line, a circle or a polygon.

7. A construction method for a support-free composite slab joint structure as described in claim 1, characterized in that, include: After the composite slabs are erected, the bottom formwork is attached below the joint between two adjacent composite slabs, and both ends of the bottom formwork are respectively attached to the bottom of the two adjacent composite slabs. An elastic pressure plate is placed above the joint between two adjacent composite slabs, and both ends of the elastic pressure plate are connected and fixed to the top of the two adjacent composite slabs. The bottom formwork and the elastic pressure plate are pressed and fixed together using tie bolts to restrict the relative position of the bottom formwork and the elastic pressure plate with respect to the two composite slabs. Reinforcing bars are tied at the joint, and the reinforcing bars are tied together where they meet the tie bolts. After the reinforcing bars are tied, concrete is poured. After the concrete reaches the design strength, the elastic pressure plate and the bottom formwork are removed, completing the construction.

8. The construction method of the support-free composite slab joint structure as described in claim 7, characterized in that, Also includes: Determine whether the protruding part of the tie bolt extends beyond the building surface. If it does, cut it off with a cutting machine; if it does not extend beyond the surface, no action is required.

9. A construction equipment, characterized in that, Includes the supportless composite slab joint structure as described in any one of claims 1-6.

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