An assembled deviation-adjustable high-strength steel bar mechanical connection device and construction method

Abstract

The invention discloses an assembled deviation-adjustable high-strength steel bar mechanical connection device and a construction method, comprising an upper connection plate, a lower connection plate, a filling plate and two prefabricated panels; the bottoms of the opposite surfaces of the two prefabricated panels are provided with installation grooves, and steel bars are provided in the two prefabricated panels; the ends of the steel bars in the two prefabricated panels extend out of the installation grooves and extend into the upper connection plate and the lower connection plate, the two steel bar ends are arranged oppositely, and the upper connection plate and the lower connection plate are connected by bolts; two filling plates are arranged between the upper connection plate and the lower connection plate, the two filling plates are respectively located on both sides of the steel bar axis, the spacing between the two filling plates is greater than the steel bar diameter, and the thickness of the filling plates is less than the steel bar diameter. Under the conditions of different steel bar axis deviations, fast equal strength connection is achieved.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering and assembly structure, and relates to an assembled deviation-adjustable high-strength steel bar mechanical connection device and a construction method. Background Art

[0002] Connection nodes in prefabricated structures are one of the key technologies, especially the steel bar connection nodes in prefabricated concrete structures. The existing steel bar connection methods in prefabricated structures include grouting sleeve connection, post-cast concrete anchor connection, welding connection, threaded sleeve connection, extrusion sleeve connection, etc., which have technical defects to varying degrees. The grouting sleeve itself is large in size, which weakens the cross-section of concrete components such as floor slabs or shear walls that are mainly subjected to in-plane forces too much. In addition, grouting is a concealed project with poor reliability. Incomplete filling defects often occur but are difficult to remedy. The post-cast concrete anchor connection requires reserved beard bars on the plate, which are easily bent and deformed during transportation and installation, and need to wait until the concrete hardens before bearing, which is time-consuming and labor-intensive. The welding connection is faster on-site construction, but the heat-affected zone of the weld is prone to brittle fracture under a major earthquake, and the quality of on-site welding is difficult to ensure, and the reliability is poor. The threaded sleeve connection requires pre-threading of the steel bar, which reduces the effective force-bearing section of the steel bar by about 25%, making it difficult to achieve an equal-strength connection. Although the rough tapping of the steel bar pier can increase the effective force-bearing area of ​​the steel bar, for small-diameter steel bars (d<16), the steel bar diameter is generally a negative difference, which is difficult to match with the sleeve. The construction operation is difficult and the cost is high. In addition, the steel bars in the prefabricated components cannot be rotated and cannot be used directly. The extrusion sleeve requires a large construction space and cannot be used directly between prefabricated concrete components.

[0003] In precast concrete components, due to concrete pouring and vibration, the steel bars at corresponding positions of different components inevitably have axis deviations, which makes many threaded connections with strict axis alignment unusable. How to achieve fast and equal strength connections under the condition of different steel bar axis deviations is a key technical problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an assembled deviation-adjustable high-strength steel bar mechanical connection device and a construction method, so as to achieve rapid equal-strength connection under conditions of different steel bar axis deviations.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An assembled deviation-adjustable high-strength steel bar mechanical connection device comprises an upper connection plate, a lower connection plate, a filling plate and two prefabricated plate members;

[0007] Installation grooves are provided at the bottoms of the opposite surfaces of the two prefabricated panels, and steel bars are provided in the two prefabricated panels; the ends of the steel bars in the two prefabricated panels extend out of the installation grooves and extend into the upper connecting plate and the lower connecting plate, the two steel bar ends are arranged opposite to each other, and the upper connecting plate and the lower connecting plate are connected by bolts; two filling plates are provided between the upper connecting plate and the lower connecting plate, the two filling plates are respectively located on both sides of the axial direction of the steel bar, the spacing between the two filling plates is greater than the diameter of the steel bar, and the thickness of the filling plates is less than the diameter of the steel bar.

[0008] Preferably, two bolts are respectively arranged on both sides of the axial direction of the steel bar to connect the upper connecting plate and the lower connecting plate, and the bolt spacing on both sides of the axial direction of the steel bar is greater than the diameter of the steel bar.

[0009] Furthermore, the bolt is located between opposite sides of the two filling plates, and two semicircular holes are provided on the opposite sides of the two filling plates, and the bolt is located in the semicircular holes.

[0010] Preferably, the filling plate is a magnetized metal plate.

[0011] Preferably, the thickness of the filling plate is the diameter of the steel bar minus 2 mm.

[0012] Preferably, the surfaces of the upper connecting plate and the lower connecting plate in contact with the steel bars are both provided with knurling that is the same as the surface of the steel bars.

[0013] Preferably, the length of the upper connecting plate and the lower connecting plate is 6d, the width is 5d, and the thickness is d, where d is the diameter of the steel bar.

[0014] Preferably, the length of the mounting groove is 5d, the depth is 3d, and the width is 1.5 times the width of the upper connecting plate and the lower connecting plate.

[0015] A construction method of the assembled deviation-adjustable high-strength steel bar mechanical connection device based on any one of the above items comprises the following process:

[0016] First, hoist the two prefabricated panels to the designated position and make close contact with them. The installation slots of the two prefabricated panels should correspond to each other. Install the upper connecting plate to the upper surface of the steel bars to ensure that the force line of the two steel bars passes through the center line of the upper connecting plate. Preliminarily fix the two filling plates to the lower surface of the upper connecting plate, and then install the lower connecting plate on the lower surface of the steel bars. Use bolts to connect the upper and lower connecting plates, and fit the top and bottom surfaces of the filling plates to the bottom and top surfaces of the upper and lower connecting plates.

[0017] Preferably, when installing the bolts, they are tightened one by one using the jump method to 1.3 times the preload force.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The device of the present invention opens up the force transmission path of the steel bar and makes the force transmission path converge to the center, with the shortest force flow, minimizing the additional eccentricity of the steel bar, thus allowing a certain axis deviation between the diameters of the two connected steel bars, and can directly connect the steel bars without special treatment, and can achieve equal strength connection. The steel bars of the prefabricated components do not need to extend out of the end face, which is convenient for processing and transportation; the efficiency of steel bar connection of prefabricated concrete panels is greatly improved, there is no welding, no wet operation, no pollution on site, and no need to rely on concrete hardening anchoring. Only ordinary wrenches or electric wrenches are needed to complete the steel bar connection, which is environmentally friendly and efficient.

[0020] Furthermore, a magnetized metal plate is used as a filler plate, which can be attached to the upper connecting plate by magnetic force during installation, thereby facilitating initial fixation.

[0021] Furthermore, knurling makes the connection between the upper connecting plate and the lower connecting plate and the steel bars more reliable. The knurling process of the steel plate is simple, and no large amount of cutting and processing of the parent material is required. The steel bars of the prefabricated panels do not need to be processed in advance, and no processing techniques such as tapping, roughening, and welding are required, which simplifies the process and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the front elevation of the mechanical connection of steel bars of the prefabricated panel described in an example of the present invention.

[0023] Figure 2 It is a schematic plan view of the mechanical connection of the reinforcement bars of the prefabricated panel described in an example of the present invention.

[0024] Figure 3 It is a cross-sectional schematic diagram of the mechanical connection of steel bars of the prefabricated panel described in an example of the present invention.

[0025] In the figure: 1 is a connecting plate, 11 is an upper connecting plate, 12 is a lower connecting plate, 2 is a filling plate; 3 is a bolt; 4 is a prefabricated plate, 41 is a steel bar, and 42 is a mounting groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] like Figure 1-3 As shown, the assembled deviation-adjustable high-strength steel bar mechanical connection device of the present invention includes a connection plate 1, a filling plate 2 and two prefabricated panels 4.

[0030] The bottoms of the opposite surfaces of the two prefabricated panels 4 are both provided with mounting grooves 42 . Steel bars 41 are arranged inside the two prefabricated panels 4 . The ends of the steel bars 41 in the two prefabricated panels 4 extend out from the sides of the mounting grooves 42 .

[0031] The connecting plate 1 includes an upper connecting plate 11 and a lower connecting plate 12. The upper connecting plate 11 and the lower connecting plate 12 are both 6d long, 5d wide, and d thick, where d is the diameter of the steel bars 41. The ends of the steel bars 41 in the two prefabricated panels 4 extend into the upper connecting plate 11 and the lower connecting plate 12, and the ends of the two steel bars 41 are arranged opposite to each other.

[0032] The upper connecting plate 11 and the lower connecting plate 12 are provided with the same knurling as the surface of the steel bar 41 on the side in contact with the steel bar 41. The spacing between the concave and convex patterns on the contact surface is not greater than 1.6mm, and the tooth height is not less than 0.4mm; after knurling, the upper connecting plate 11 and the lower connecting plate 12 need to be quenched and tempered, and the hardness must be not less than HRC32. Through holes need to be opened on both the upper and lower plates of the connecting plate 1. The upper connecting plate 11 has two bolt holes on both sides along the axis of the steel bar, and the lower connecting plate 12 has two bolt circular holes on both sides along the axis of the steel bar. The accuracy must meet the requirements of 12.9 grade high-strength bolts.

[0033] The upper connecting plate 11 and the lower connecting plate 12 are connected by bolts 3 passing through the bolt holes. Two bolts 3 are respectively arranged on both sides of the axial direction of the steel bar 41 to connect the upper connecting plate 11 and the lower connecting plate 12. The bolt spacing on both sides of the axial direction of the steel bar 41 is greater than the diameter of the steel bar 41.

[0034] Two filling plates 2 are arranged between the upper connecting plate 11 and the lower connecting plate 12. The filling plates 2 are made of mild steel, and have the same length as the connecting plate 11 and the lower connecting plate 12, a width of 1d, and a thickness of d-2mm. The two filling plates 2 are respectively located on both sides of the axial direction of the steel bar 41, and the spacing between the two filling plates 2 is greater than the diameter of the steel bar 41, and the thickness of the filling plates 2 is less than the diameter of the steel bar 41. The bolt 3 is located between the opposite sides of the two filling plates 2. Two semicircular holes are arranged on the opposite sides of the two filling plates 2, and their positions are consistent with the positions of the bolt thread holes. The bolt 3 is located in the semicircular holes. The filling plates 2 finally need to be magnetized to generate a permanent magnetic field.

[0035] The length of the mounting groove 42 of the prefabricated panel 4 is 5d, the depth is 3d, and the width is 1.5 times the width of the upper connecting plate 11 and the lower connecting plate 12 .

[0036] The production of prefabricated panels 4 requires that the same type of prefabricated panels 4 and the arrangement of steel bars 41 to be connected are processed and manufactured according to the same module. First, tie the steel bars 41, support the formwork, and reserve the connection installation groove 42 on the side of the prefabricated panels 4 to be connected. The end of the connected steel bars 41 is arranged in the center of the installation groove 42. Pour concrete and maintain until the age.

[0037] The construction method of the device of the present invention comprises the following steps:

[0038] First, hoist the two prefabricated panels 4 to the specified position and make close contact with them. At this time, the installation grooves 42 of the prefabricated panels 4 remain basically corresponding, and the ends of the steel bars 41 are roughly in a straight line. Install the upper connecting plate 11 on the upper surface of the steel bars 41 to ensure that the force line of the two steel bars 41 passes through the center line of the upper connecting plate 11. Adsorb the two filling plates 2 on the lower surface of the upper connecting plate 11 with the semicircular holes facing inward for temporary fixation; then install the lower connecting plate 12 on the lower surface of the steel bars, use bolts 3 to penetrate the lower connecting plate 12 from bottom to top and then screw them into the bolt holes of the upper connecting plate 11. Tighten them one by one using the jump method to 1.3 times the preload force, and make the top and bottom surfaces of the filling plates 2 completely fit with the bottom and top surfaces of the upper and lower connecting plates 11, 12.

[0039] After the connection is completed, the installation groove 42 is filled with fine stone grouting material to prevent the connection parts from being corroded and the bolts from being loosened, and the surfaces of the two connected prefabricated panels 4 are smooth and beautiful.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. An assembled deviation-adjustable high-strength steel bar mechanical connection device, characterized in that: It comprises an upper connecting plate (11), a lower connecting plate (12), a filling plate (2) and two prefabricated plate members (4); The bottoms of the opposing surfaces of the two prefabricated panels (4) are each provided with a mounting groove (42), and steel bars (41) are provided in the two prefabricated panels (4); the ends of the steel bars (41) in the two prefabricated panels (4) extend out of the mounting groove (42) and extend into the upper connecting plate (11) and the lower connecting plate (12), the ends of the two steel bars (41) are arranged opposite to each other, and the upper connecting plate (11) and the lower connecting plate (12) are connected by bolts (3); two filling plates (2) are provided between the upper connecting plate (11) and the lower connecting plate (12), the two filling plates (2) are respectively located on both sides of the axial direction of the steel bars (41), the spacing between the two filling plates (2) is greater than the diameter of the steel bars (41), and the thickness of the filling plates (2) is less than the diameter of the steel bars (41); Two bolts (3) are respectively arranged on both sides of the axial direction of the steel bar (41) to connect the upper connecting plate (11) and the lower connecting plate (12), and the spacing between the bolts on both sides of the axial direction of the steel bar (41) is greater than the diameter of the steel bar (41); The bolt (3) is located between the opposite sides of the two filling plates (2), and the opposite sides of the two filling plates (2) are each provided with two semicircular holes, and the bolt (3) is located in the semicircular holes; The filling plate (2) is a metal plate that has been magnetized.

2. The assembled deviation-adjustable high-strength steel bar mechanical connection device according to claim 1 is characterized in that: The thickness of the filler plate (2) is the diameter of the steel bar (41) minus 2 mm.

3. The assembled deviation-adjustable high-strength steel bar mechanical connection device according to claim 1 is characterized in that: The surfaces of the upper connecting plate (11) and the lower connecting plate (12) that are in contact with the steel bars (41) are both provided with knurling that is the same as the surface of the steel bars (41).

4. The assembled deviation-adjustable high-strength steel bar mechanical connection device according to claim 1 is characterized in that: The length of the upper connecting plate (11) and the lower connecting plate (12) is 6d, the width is 5d, and the thickness is d, where d is the diameter of the steel bar (41).

5. The assembled deviation-adjustable high-strength steel bar mechanical connection device according to claim 1 is characterized in that: The length of the mounting groove (42) is 5d, the depth is 3d, and the width is 1.5 times the width of the upper connecting plate (11) and the lower connecting plate (12).

6. A construction method based on the assembled deviation-adjustable high-strength steel bar mechanical connection device according to any one of claims 1 to 5, characterized in that: The process includes: First, the two prefabricated panels (4) are hoisted to the designated positions and are in close contact with each other. The positions of the installation grooves (42) of the two prefabricated panels (4) correspond to each other. The upper connecting plate (11) is installed on the upper surface of the steel bars (41) to ensure that the resultant force line of the two steel bars (41) passes through the center line of the upper connecting plate (11). The two filling plates (2) are initially fixed on the lower surface of the upper connecting plate (11). Then, the lower connecting plate (12) is installed on the lower surface of the steel bars (41). The upper connecting plate (11) and the lower connecting plate (12) are connected by bolts (3), and the top and bottom surfaces of the filling plate (2) are both in contact with the bottom and top surfaces of the upper connecting plate (11) and the lower connecting plate (12).

7. The construction method of the assembled deviation-adjustable high-strength steel bar mechanical connection device according to claim 6 is characterized in that: When installing the bolts, use the jump method to tighten them one by one to 1.3 times the preload.

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