Node structure for opening large slotted hole in top of reinforced concrete beam
By setting a node structure of steel sleeves, steel ring plates and steel mesh in reinforced concrete beams, the problem of opening large slots at the top of reinforced concrete beams is solved. This allows for direct opening of holes without affecting the position of the beams and equipment, meets structural strength requirements, and simplifies construction.
Patent Information
- Application Number
- CN202423254968.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-28
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-28
AI Technical Summary
When creating large slots at the top of reinforced concrete beams, existing technologies struggle to effectively avoid adjusting the positions of beams and equipment, resulting in structural calculation indicators failing to meet specifications and significant construction difficulties.
A steel sleeve is installed in the reinforced concrete beam, and a steel ring plate is installed on top of it. Shear studs are installed on the outside, and a steel mesh is welded on the inside. The steel mesh is installed in layers every 200mm along the depth of the hole, and embedded parts are installed on the top. The longitudinal bars and stirrups are cut off at the holes and welded to the steel ring plate to ensure the strength of the beam and the reliability of the connection.
It enables the direct drilling of large holes in reinforced concrete beams, which is simple and reliable to operate, does not require adjustment of the beam or equipment position, meets structural calculation requirements, and is convenient to construct.
Smart Images
Figure CN223634332U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a node method of large -scale groove hole on the top of reinforced concrete beam belongs to civil engineering field. BACKGROUND
[0002] In industrial building, especially in some special industries, when large -scale equipment is arranged on the roof, the civil engineering professional needs to reserve anchor bolt hole, so that the equipment installation of later process professional is carried out. The hole width of some special equipment can reach 200~300mm, and the hole depth can reach 500~600mm. When civil engineering designs, the beam is preferentially selected to avoid the hole, and the secondary pouring hole is reserved through the ways such as reducing the plate height and adding the plate thickness. But when the hole spacing is small, the quantity is dense and many, it is often difficult to round off the beam completely, especially in some over-limit structures, the irregular adjustment of frame beam can have adverse effects on the overall structure, so that the structure calculation index cannot meet the specification requirements. The beam height can also be reduced, and the secondary pouring hole is made on the top of the beam, but this scheme increases the dead load too much, and cannot be realized when the building clearance has requirements. When the equipment load is large, for the fixed connection beam such as frame beam, the reinforcement on the top of the beam is often large, and the shear resistance requirement of the beam is high, so directly opening the deep hole on the top of the beam will break all the longitudinal reinforcement and stirrup, and the conventional construction technology is difficult to realize. CONTENT OF THE UTILITY MODEL
[0003] The technical problem solved by the utility model is that the node method is researched and innovated to solve the difficulty of opening large -scale groove hole on the top of reinforced concrete beam, and the utility model provides a node structure of opening large -scale groove hole on the top of reinforced concrete beam.
[0004] The technical scheme of the utility model is specifically as follows:
[0005] A node structure of opening large -scale groove hole on the top of reinforced concrete beam, including a reserved hole arranged in the reinforced concrete beam, a steel sleeve arranged in the reserved hole, a steel ring plate arranged on the upper part of the steel sleeve, a shear bolt arranged on the outer side of the steel sleeve, a steel mesh welded on the inner side of the steel sleeve, one layer of the steel mesh being arranged every 200mm along the hole depth direction, and a embedded part arranged on the uppermost surface of the steel mesh, the embedded part being located in the reinforced concrete beam.
[0006] The diameter of the steel in the steel mesh is 8mm.
[0007] The reinforced concrete beam includes longitudinal reinforcement and stirrup, wherein the longitudinal reinforcement on the top is truncated at the reserved hole, the stirrup at the corresponding position of the top hole is also truncated, a truncated steel is arranged at the top of the reserved hole, and the truncated steel is welded to the top of the steel ring plate.
[0008] The height of the reinforced concrete beam should be at least 100mm higher than the height of the steel sleeve, and the width of the reinforced concrete beam should be at least 50mm wider than the width of the steel ring plate on each side.
[0009] The utility model discloses beneficial effect is: the utility model discloses realized the direct establishment of large -scale hole on the reinforced concrete beam, need not adjust the position of beam or equipment, with convenient operation, reliable performance, easy to implement's characteristics can be popularized comprehensively. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is the embedded node plan view;
[0011] Figure 2 It is the embedded node side view;
[0012] Figure 3 It is the embedded node installation Figure 1 ;
[0013] Figure 4 It is -1 profile;
[0014] Figure 5 It is the embedded node installation Figure 2 ;
[0015] Figure 6 It is the longitudinal reinforcement lap welding schematic drawing. DETAILED DESCRIPTION
[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.
[0017] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0018] As Figure 1 Indicated, a kind of reinforced concrete beam top opening large slot node structure, realize the demand of beam top opening large hole.It includes being arranged in reinforced concrete beam 9 in reserved hole, steel sleeve 1 is arranged in reserved hole, steel sleeve 1 upper portion is arranged steel ring plate 2, specific size is determined according to beam height, longitudinal reinforcement diameter, steel sleeve 1 and steel ring plate 2 are welded by beveling weld joint and are strongly welded, when steel ring plate 2 is larger and influences concrete pouring, pouring hole can be arranged on it.
[0019] The outer side of the steel sleeve 1 is provided with shear-resistant nails 3, and the inner side surface 4 of the steel sleeve is roughened, such as being grooved or sandblasted.
[0020] A steel mesh 6 is welded to the inner side of the steel sleeve 1, the steel bars in the steel mesh 6 have a diameter of 8 mm, and the steel mesh 6 is provided with a layer every 200 mm along the hole depth direction, so as to enhance the bonding capacity between the secondary cast concrete and the embedded part joint.
[0021] The steel reinforced concrete beam 9 comprises longitudinal bars 8 and stirrups 10, wherein the longitudinal bars 8 at the top are truncated at the reserved hole, and the stirrups 10 at the corresponding position of the top hole are also truncated.
[0022] The upper surface of the steel ring plate 2 is tightly attached to the lower surface of the top longitudinal bar 8, the thickness of the steel material can be replaced according to the strength of the truncated steel bars, the replaced tensile / compressive strength value of the steel ring plate 2 should be greater than twice that of the truncated steel bars, and the thickness of the steel material is not less than 16 mm, so as to be processed by welding and other processes.
[0023] The height of the steel reinforced concrete beam 9 should be at least 100 mm higher than the height of the steel sleeve 1, and the width of the steel reinforced concrete beam 9 should be at least 50 mm wider than the width of the steel ring plate 2 on each side.
[0024] The construction method of the utility model is as follows:
[0025] During construction, the joint is first embedded into the steel reinforced concrete beam 9, the upper broken longitudinal bars 8 and stirrups 10 are truncated at the reserved hole, and the top longitudinal bars 8 are double-sided welded on the steel ring plate 2, as shown in Figure 3 , Figure 4 .
[0026] Before the process installation, after confirming the specification and size of the embedded part 5, the steel mesh 6 (steel bar diameter 8 mm) is welded to the inner side of the steel sleeve 1, and a layer is arranged every 200 mm along the hole depth direction, so as to enhance the bonding capacity between the secondary cast concrete and the embedded part joint, as shown in Figure 5 . Before the embedded part 5 is in place, the truncated steel bars 7 at the hole position are welded to the top of the steel ring plate 2 according to the specific position of the embedded part anchor bar or anchor, as shown in Figure 6 . The truncated stirrups are connected by welding lap joint. After the embedded part is in place, the concrete can be poured, and the whole beam with the hole is poured with fine stone concrete.
[0027] The utility model has the characteristics of convenient operation, reliable performance and easy implementation, and can be widely promoted.
[0028] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the overall concept of the present application, a number of changes and improvements can be made, and these should also be considered as falling within the scope of the present application.
Claims
1. A joint structure for a reinforced concrete beam with a large opening, characterized by: The steel sleeve (1) is arranged in the reserved hole in the reinforced concrete beam (9), the upper part of the steel sleeve (1) is provided with a steel ring plate (2), the outer side of the steel sleeve (1) is provided with a shear bolt (3), the inner side of the steel sleeve (1) is welded with a steel mesh (6), the steel mesh (6) is arranged every 200 mm along the hole depth direction, the uppermost part of the steel mesh (6) is provided with a embedded part (5), and the embedded part (5) is located in the reinforced concrete beam (9).
2. A reinforced concrete beam top opening large notched joint structure according to claim 1, characterized in that: The diameter of the steel bar in the steel mesh (6) is 8 mm.
3. A reinforced concrete beam top opening large notched joint structure according to claim 1, characterized in that: The reinforced concrete beam (9) comprises longitudinal reinforcement (8) and stirrups (10), wherein the top longitudinal reinforcement (8) is cut off at the reserved hole, the top opening corresponding position of the stirrup (10) is also cut off, and the topmost part of the reserved hole is provided with a cut-off steel bar (7), and the cut-off steel bar (7) is welded to the top of the steel ring plate (2).
4. A reinforced concrete beam top opening large notched joint structure according to claim 1, characterized in that: The height of the reinforced concrete beam (9) should be at least 100 mm higher than the height of the steel sleeve (1), and the width of the reinforced concrete beam (9) should be at least 50 mm wider than the width of the steel ring plate (2) on each side.