Penetrating type embedded steel bar structure of new beam and old column connecting joint
By adopting a through-type planting reinforcement structure in the old building, and using variable cross-section through the planting reinforcement holes and high-strength non-shrinkage grouting materials, the problems of planting reinforcement in old building are solved, and stable connection and efficient construction are achieved.
Patent Information
- Application Number
- CN202422370058.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In the reinforcement of old buildings, the existing technology has problems such as inability to guarantee the quality of the reinforcement, low construction efficiency, large number of joints and unfavorable construction period control. Especially when the newly added frame beams are connected to the original vertical structure, the conventional reinforcement method cannot achieve horizontal penetration and secondary glue replenishment is required.
The through-type implantation rib structure is adopted. By opening variable-section through-transplantation rib holes in the vertical structure, and using high-strength non-shrinkage grouting material and limit anchor head system, the direct implantation and one-time grouting and solidification of the longitudinal ribs of the horizontal through beam are achieved, forming a occlusion tooth consolidation body, reducing joints, and improving stress performance.
The quality of the planting ribs is ensured, the number of joints is reduced, the construction efficiency is improved, the construction period is shortened, the stress performance of the steel bars is enhanced, and the stable connection of horizontal through beam steel bars is achieved.
Smart Images
Figure CN223088984U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the reinforcement and renovation project of old buildings, and particularly relates to a through-inserted rebar structure for the connection node of a new beam and an old column. Background Technique
[0002] During the reinforcement and renovation process of old buildings, the connection between newly added frame beams and the original vertical structures often occurs, such as the connection between frame beams and frame columns or walls. According to the structural force requirements, some steel bars of the frame beam need to horizontally penetrate the cross-section of the original vertical structure. At this time, the conventional rebar planting method is to first drill holes in the vertical structure, pour rebar planting glue into the holes after cleaning the holes, and then insert the steel bars into the holes. However, the conventional rebar planting method has the following problems when applied in this beam-column joint area:
[0003] First, the conventional rebar planting construction method requires drilling holes in the vertical structure according to the spacing of the beam steel bars first, and pouring rebar planting glue after cleaning the holes. During the process of threading the beam steel bars in the vertical structure, the rebar planting glue will stick to the steel bar threads, resulting in insufficient rebar planting glue. Therefore, secondary glue filling is required in the subsequent steps. At the same time, since the rebar planting holes are generally 2 mm - 4 mm larger than the diameter of the steel bars, the glue gun nozzle for secondary glue filling cannot reach into the holes, and the quality of secondary glue filling cannot be guaranteed, resulting in the inability to guarantee the quality of rebar planting.
[0004] Second, the conventional rebar planting method is to use short steel bars for non-through insertion, and then connect the stressed steel bars with the short steel bars. For the steel bars constructed at the beam-column joint position, the joints should be located in the area with smaller shear force. Therefore, the conventional method not only results in a large number of steel bar joints but also affects the steel bar force. Especially when the newly added beam steel bars need to be designed to horizontally penetrate the vertical structure, the conventional rebar planting method cannot be realized.
[0005] Third, in the conventional rebar planting method, in order to avoid the influence of other construction operations on the rebar planting effect, it is necessary to wait for the rebar planting glue to cure before proceeding, resulting in construction breaks, which is not conducive to the construction period control.
[0006] Therefore, how to ensure the quality of rebar planting at the beam node part of the frame beam when penetrating the vertical structure, while ensuring the construction efficiency, reducing the number of joints, is a difficult problem that urgently needs to be solved in the current reinforcement project. Content of the Utility Model
[0007] The purpose of the utility model is to provide a through-inserted rebar structure for the connection node of a new beam and an old column, which aims to solve the technical problems existing in the prior art, such as the need for secondary glue filling construction, resulting in the inability to guarantee the quality of rebar planting; and also solve the technical problems that the construction method of implanting and extending short steel bars in the prior art makes the stress area not meet the stress requirements, and at the same time, the horizontal penetration of beam steel bars cannot be realized by the prior art for rebar planting construction; and also solve the technical problem that the existing rebar planting method needs to wait for the rebar planting glue to cure, resulting in construction breaks, which is not conducive to the construction period control.
[0008] To achieve the above object, the utility model adopts the following technical solutions:
[0009] A penetrating rebar planting structure for the connection node of a new beam and an old column, including the vertical frame structure of an old building, a newly added frame beam, and a penetrating rebar planting system.
[0010] In the connection node area between the vertical frame structure of the old building and the newly added frame beam, there are penetrating rebar planting holes that horizontally penetrate the vertical frame structure of the old building. The positions and numbers of the penetrating rebar planting holes correspond to the positions and numbers of the horizontally penetrating beam longitudinal rebars of the newly added frame beam.
[0011] The penetrating rebar planting holes are variable cross-section through holes, and the cross-sectional pore diameters are all larger than the diameters of the horizontally penetrating beam longitudinal rebars. According to the size of the cross-sectional pore diameters, the penetrating rebar planting holes include a basic diameter section and an enlarged diameter section. The basic diameter section and the enlarged diameter section are horizontally connected, and the enlarged diameter section is located at both ends of the penetrating rebar planting hole, close to the side surface of the vertical frame structure of the old building, forming an end enlarged hole section.
[0012] Each penetrating rebar planting hole is correspondingly provided with a set of penetrating rebar planting systems, and each penetrating rebar planting system includes two end limiting anchor heads, a grouting nozzle, and a grouting supplement funnel.
[0013] The two end limiting anchor heads are respectively arranged on the corresponding front and rear sides of the vertical frame structure of the old building. The end limiting anchor heads are hermetically connected to the side wall of the vertical frame structure of the old building. Two types of functional through holes are opened on the end limiting anchor heads, namely the anchor head hole and the grouting hole for injecting the rebar planting solidifying material.
[0014] The grouting hole is located directly above the anchor head hole, and the axis of the anchor head hole is aligned with the axis of the penetrating rebar planting hole. The horizontally penetrating beam longitudinal rebar horizontally passes through the penetrating rebar planting hole and the anchor head holes at both ends, and the gap between the periphery of the horizontally penetrating beam longitudinal rebar and the anchor head hole is hermetically connected.
[0015] The grouting nozzle and the grouting supplement funnel are respectively arranged at both ends. The grouting nozzle is inserted into the end of the corresponding side of the penetrating rebar planting hole through the grouting hole of one side of the end limiting anchor head, and the grouting supplement funnel is inserted into the end of the corresponding side of the penetrating rebar planting hole through the grouting hole of the other side of the end limiting anchor head.
[0016] The rebar planting solidifying material is a high-strength non-shrinking grouting material. The rebar planting solidifying material is injected into the penetrating rebar planting hole once from the grouting hole, and the rebar planting solidifying material overflows from the grouting supplement funnel. The rebar planting solidifying material wraps the horizontally penetrating beam longitudinal rebar in the entire penetrating rebar planting hole to form a bite tooth consolidation body.
[0017] The enlarged diameter section is also arranged at other positions of the penetrating rebar planting hole, forming a non-end enlarged hole section. The non-end enlarged hole section is provided with one in the center of the penetrating rebar planting hole or a group is arranged at intervals between the end enlarged hole sections.
[0018] The grouting nozzle is inserted into the end enlarged section on the corresponding side through the grouting hole of the end limit anchor head on one side, and the grouting supplementary funnel is inserted into the end enlarged section on the corresponding side through the grouting hole of the end limit anchor head on the other side. The set length of the end enlarged section is greater than the insertion length of the grouting nozzle or the grouting supplementary funnel after passing through the end limit anchor head.
[0019] The set length of the non-end enlarged section is not greater than the set length of the end enlarged section.
[0020] Internal threads are provided on the inner wall of the grouting hole of the end limit anchor head, and external threads are provided on the outer wall of the connection end of the grouting nozzle or the grouting supplementary funnel. The grouting nozzle or the grouting supplementary funnel is detachably threadedly connected to the grouting hole of the end limit anchor head.
[0021] The grouting nozzle is L-shaped, including a vertical section of the grouting nozzle and a horizontal section of the grouting nozzle. External threads are provided at the connection end of the horizontal section of the grouting nozzle.
[0022] The grouting supplementary funnel is an L-shaped with a horizontal flip, including a vertical section of the funnel and a horizontal section of the funnel. External threads are provided at the connection end of the horizontal section of the funnel.
[0023] The longitudinal bars of the horizontal through beam and the end limit anchor head are connected by plug welding through holes.
[0024] The inner side of the end limit anchor head is a plane, and the plane is in close contact with the side wall of the vertical frame structure of the old building and is bonded through an adhesive layer. The adhesive layer is a planting glue.
[0025] Compared with the prior art, the utility model has the following characteristics and beneficial effects:
[0026] The utility model does not need to implant short steel bars for lengthening. The longitudinal bars of the horizontal through beam are directly horizontally passed through the planting holes, and at the same time, the planting holes are designed. An eccentric offset drill is used to set several enlarged holes in the planting holes, and the planting holes are designed in a variable cross-section form. At the same time, high-strength non-shrink grouting material is used to replace the existing planting glue. When the high-strength non-shrink grouting material is cured, combined with the variable cross-section form of the planting holes, a consolidated body with occlusal teeth is formed to increase the bite force between the high-strength non-shrink grouting material and the steel bars and enhance the force-bearing of the steel bars.
[0027] The utility model also designs a through planting reinforcement system. Limit anchor heads are arranged at both ends of the planting holes to seal the planting holes. At the same time, two kinds of holes, namely anchor head holes and grouting holes, are opened on the limit anchor heads. The longitudinal bars of the horizontal through beam pass through the anchor head holes, and a grouting nozzle and a grouting supplementary funnel are respectively connected to the upper parts of the grouting holes at both ends. Since the ends of the planting holes are enlarged holes, it is convenient for the grouting nozzle and the grouting supplementary funnel to be inserted into the planting holes to realize grouting. The grouting nozzle performs primary grouting on one side, and when the slurry overflows in the grouting supplementary funnel, the grouting is completed, so that the slurry is fully filled in the planting holes.
[0028] In addition to plugging the rebar planting holes, the limit anchor head of the present utility model also plays a role in fixing the longitudinal bars of the horizontally through beam. After rebar planting, other construction operations can be inserted without waiting for curing, which speeds up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The present utility model will be further described in detail below with reference to the drawings.
[0030] Figure 1 It is a schematic longitudinal side view structure diagram of the present utility model.
[0031] Figure 2 is Figure 1 The partial enlarged view in
[0032] Figure 3 It is a schematic transverse side view structure diagram of the present utility model.
[0033] Figure 4 is Figure 3 The partial enlarged view in
[0034] Reference numerals: 1 - through rebar planting hole, 11 - diameter basic section, 12 - end enlarged hole section, 13 - non-end enlarged hole section, 2 - longitudinal bars of horizontally through beam, 3 - vertical frame structure of old building, 4 - newly added frame beam, 5 - end limit anchor head, 51 - anchor head hole, 52 - grouting hole, 6 - grouting nozzle, 61 - vertical section of grouting nozzle, 62 - horizontal section of grouting nozzle, 7 - grouting supplementary funnel, 71 - vertical section of funnel, 72 - horizontal section of funnel, 8 - rebar planting curing material, 9 - bonding layer. SPECIFIC EMBODIMENTS
[0035] Refer to the embodiment shown in Figures 1-4 A penetrating rebar planting structure for the connection node of a new beam and an old column includes a vertical frame structure 3 of an old building, a newly added frame beam 4 and a through rebar planting system.
[0036] A through rebar planting hole 1 that horizontally penetrates the vertical frame structure 3 of the old building is provided in the connection node area between the vertical frame structure 3 of the old building and the newly added frame beam 4. The opening position and number of the through rebar planting holes 1 correspond to the setting position and number of the longitudinal bars 2 of the horizontally through beam of the newly added frame beam 4.
[0037] In this embodiment, the horizontally through vertical frame structure 3 of the old building is a frame column. Two rows of through rebar planting holes 1 are provided in the connection node area, corresponding to the upper layer beam longitudinal bars and the lower layer beam longitudinal bars of the newly added frame beam 4 respectively. Three through rebar planting holes 1 are provided in each row.
[0038] The through-inserted rebar hole 1 is a variable cross-section through hole, and the cross-sectional hole diameter is larger than the diameter of the horizontal through beam longitudinal rebar 2. According to the size of the cross-sectional hole diameter, the through-inserted rebar hole 1 includes a basic diameter section 11 and a diameter-expanded section. The basic diameter section 11 is horizontally connected to the diameter-expanded section, and the diameter-expanded section is located at both ends of the through-inserted rebar hole 1, close to the side surface of the vertical frame structure 3 of the old building, forming an end-expanded hole section 12.
[0039] The diameter-expanded section is also provided at other positions of the through-inserted rebar hole 1, forming a non-end-expanded hole section 13. The non-end-expanded hole section 13 is provided with one in the center of the through-inserted rebar hole 1 or a group is arranged at intervals between the end-expanded hole sections 12. In this embodiment, the non-end-expanded hole section 13 is provided in the center of the through-inserted rebar hole 1.
[0040] A set of through-inserted rebar systems is correspondingly provided for each through-inserted rebar hole 1. The through-inserted rebar system includes two end limit anchor heads 5, a grouting nozzle 6, and a grouting supplement funnel 7.
[0041] The two end limit anchor heads 5 are respectively arranged on the corresponding side parts in the front and back of the vertical frame structure 3 of the old building. The end limit anchor head 5 is hermetically connected to the side wall of the vertical frame structure 3 of the old building. The cross-sectional form of the end limit anchor head 5 can be circular. The inner side of the end limit anchor head 5 is a plane, and the plane is closely attached to the side wall of the vertical frame structure 3 of the old building and is bonded through an adhesive layer 9. The adhesive layer 9 is planting glue.
[0042] Two types of functional through holes are opened on the end limit anchor head 5, namely an anchor head hole 51 and a grouting hole 52 for injecting the rebar curing material 8. The grouting hole 52 is located directly above the anchor head hole 51. The hole axis of the anchor head hole 51 is aligned with the hole axis of the through-inserted rebar hole 1. The horizontal through beam longitudinal rebar 2 horizontally passes through the through-inserted rebar hole 1 and the anchor head holes 51 at both ends. The gap between the periphery of the horizontal through beam longitudinal rebar 2 and the anchor head hole 51 is hermetically connected. In this embodiment, the horizontal through beam longitudinal rebar 2 and the end limit anchor head 5 are connected by plug welding through the hole.
[0043] The grouting nozzle 6 and the grouting supplement funnel 7 are respectively arranged at both ends. The grouting nozzle 6 is inserted into the end of the corresponding side through-inserted rebar hole 1 through the grouting hole 52 of one side end limit anchor head 5, and the grouting supplement funnel 7 is inserted into the end of the corresponding side through-inserted rebar hole 1 through the grouting hole 52 of the other side end limit anchor head 5. In this embodiment, the grouting nozzle 6 is inserted into the end-expanded hole section 12 of the corresponding side through the grouting hole 52 of one side end limit anchor head 5, and the grouting supplement funnel 7 is inserted into the end-expanded hole section 12 of the corresponding side through the grouting hole 52 of the other side end limit anchor head 5. The set length of the end-expanded hole section 12 is greater than the insertion length after the grouting nozzle 6 or the grouting supplement funnel 7 passes through the end limit anchor head 5. The set length of the non-end-expanded hole section 13 is not greater than the set length of the end-expanded hole section 12.
[0044] In this embodiment, the grouting nozzle 6 is L-shaped, including a vertical section 61 of the grouting nozzle and a horizontal section 62 of the grouting nozzle. The connecting end of the horizontal section 62 of the grouting nozzle is provided with an external thread. The grouting supplementary funnel 7 is an L-shaped one with a horizontal flip, including a vertical section 71 of the funnel and a horizontal section 72 of the funnel. The connecting end of the horizontal section 72 of the funnel is provided with an external thread. An internal thread is provided on the inner wall of the grouting hole 52 of the end limit anchor head 5, and the grouting nozzle 6 or the grouting supplementary funnel 7 is detachably threadedly connected to the grouting hole 52 of the end limit anchor head 5.
[0045] In this embodiment, the reinforcing bar anchoring and solidifying material 8 is a high-strength non-shrinking grouting material. The reinforcing bar anchoring and solidifying material 8 is injected once through the grouting hole 52 to penetrate through the reinforcing bar hole 1. The reinforcing bar anchoring and solidifying material 8 overflows from the grouting supplementary funnel 7, and the reinforcing bar anchoring and solidifying material 8 wraps the horizontally penetrating beam longitudinal reinforcement 2 in the whole penetrating reinforcing bar hole 1 to form an occlusal tooth consolidation body.
[0046] The method for constructing by applying the utility model is as follows:
[0047] Step 1, polish the surface of the frame column to expose the new concrete surface, and then brush a layer of interfacial agent.
[0048] Step 2, use a reinforcing bar detector to find out the positions of the original column reinforcing bars. First, use an ordinary electric drill to drill a horizontally penetrating reinforcing bar hole in the frame column, and then use an eccentric offset drill to expand both ends of the reinforcing bar hole and the preset positions to form a penetrating reinforcing bar hole 1 including a plurality of diameter-expanded sections inside.
[0049] Step 3, after the penetrating reinforcing bar hole 1 is drilled, first clean the hole with a brush; then use clean and oil-free compressed air or a manual air blower, i.e., a bellows, to remove the dust in the hole. Such treatment should be repeated no less than 3 times until there is no dust debris. When necessary, use a clean cotton yarn and a brush to dip a small amount of industrial acetone to wipe the hole wall clean to ensure good bonding effect between the hole wall and the grouting material.
[0050] Step 4, install the horizontally penetrating beam longitudinal reinforcement 2 passing through the frame column, sleeved with the end limit anchor head 5 from the anchor head hole 51 for plug welding, and then sleeved with the beam stirrups.
[0051] Step 5, use the bonding layer 9 of the reinforcing bar anchoring glue to fix the end limit anchor head 5 to the surface of the frame column, and then install the grouting nozzle 6 and the grouting supplementary funnel 7 on the grouting hole 52 of the end limit anchor head 5, and check whether the grouting channel is unblocked.
[0052] Step 6, configure the high-strength non-shrinking grouting material, grout from the grouting nozzle 6, control the grouting pressure well, and stop grouting when the grouting material overflows from the grouting supplementary funnel 7 at the other end.
[0053] Step 7, after the grouting material hardens, remove the grouting nozzle 6 and the grouting supplementary funnel 7, and entrust a third party to conduct a steel bar in-situ pull-out test.
Claims
1. A through-embedded rebar structure for the connection node of a new beam and an old column, characterized in that: It includes the vertical frame structure (3) of the old building, the newly added frame beam (4) and the through rebar planting system. In the connection node area between the vertical frame structure (3) of the old building and the newly added frame beam (4), there are through rebar planting holes (1) that horizontally penetrate the vertical frame structure (3) of the old building. The positions and numbers of the through rebar planting holes (1) correspond to the positions and numbers of the horizontally through beam longitudinal rebars (2) of the newly added frame beam (4). The through rebar planting hole (1) is a variable cross-section through hole, and the cross-sectional aperture is larger than the diameter of the horizontally through beam longitudinal rebar (2). According to the size of the cross-sectional aperture, the through rebar planting hole (1) includes a diameter basic section (11) and a diameter enlarged section. The diameter basic section (11) is horizontally connected to the diameter enlarged section, and the diameter enlarged section is located at both ends of the through rebar planting hole (1), near the side surface of the vertical frame structure (3) of the old building, forming an end enlarged hole section (12). A set of through rebar planting system is correspondingly arranged for each through rebar planting hole (1). The through rebar planting system includes two end limiting anchor heads (5), a grouting nozzle (6) and a grouting supplementary funnel (7). The two end limiting anchor heads (5) are respectively arranged on the corresponding front and rear sides of the vertical frame structure (3) of the old building. The end limiting anchor head (5) is hermetically connected to the side wall of the vertical frame structure (3) of the old building. There are two types of functional through holes on the end limiting anchor head (5), namely the anchor head hole (51) and the grouting hole (52) for injecting the rebar planting solidifying material (8). The grouting hole (52) is located directly above the anchor head hole (51). The axis of the anchor head hole (51) is aligned with the axis of the through rebar planting hole (1). The horizontally through beam longitudinal rebar (2) horizontally passes through the through rebar planting hole (1) and the anchor head holes (51) at both ends. The gap between the periphery of the horizontally through beam longitudinal rebar (2) and the anchor head hole (51) is hermetically connected. The grouting nozzle (6) and the grouting supplementary funnel (7) are respectively arranged at both ends. The grouting nozzle (6) is inserted into the end of the corresponding through rebar planting hole (1) through the grouting hole (52) of one side's end limiting anchor head (5), and the grouting supplementary funnel (7) is inserted into the end of the corresponding through rebar planting hole (1) through the grouting hole (52) of the other side's end limiting anchor head (5).
2. The penetrating rebar planting structure of the new beam and old column connection node according to claim 1, characterized in that: The rebar planting solidifying material (8) is a high-strength non-shrinking grouting material. The rebar planting solidifying material (8) is injected into the through rebar planting hole (1) once from the grouting hole (52). The rebar planting solidifying material (8) overflows from the grouting supplementary funnel (7). The rebar planting solidifying material (8) wraps the horizontally through beam longitudinal rebar (2) in the whole through rebar planting hole (1) to form an occlusal tooth consolidation body.
3. The penetrating rebar planting structure of the new beam and old column connection node according to claim 1, characterized in that: The diameter enlarged section is also arranged at other positions of the through rebar planting hole (1), forming a non-end enlarged hole section (13). The non-end enlarged hole section (13) is provided with one in the center of the through rebar planting hole (1) or a group is arranged at intervals between the end enlarged hole sections (12).
4. The through-embedded bar structure of the new beam and old column connection node according to claim 3, characterized in that: The grouting nozzle (6) is inserted into the end enlarged hole section (12) on the corresponding side through the grouting hole (52) of the end limiting anchor head (5) on one side, and the grouting supplementary funnel (7) is inserted into the end enlarged hole section (12) on the corresponding side through the grouting hole (52) of the end limiting anchor head (5) on the other side. The set length of the end enlarged hole section (12) is greater than the insertion length of the grouting nozzle (6) or the grouting supplementary funnel (7) after passing through the end limiting anchor head (5). The set length of the non-end enlarged hole section (13) is not greater than the set length of the end enlarged hole section (12).
5. The penetrating rebar planting structure of the new beam and old column connection node according to claim 1, characterized in that: Internal threads are provided on the inner wall of the grouting hole (52) of the end limiting anchor head (5), and external threads are provided on the outer wall of the connecting end of the grouting nozzle (6) or the grouting supplementary funnel (7). The grouting nozzle (6) or the grouting supplementary funnel (7) is detachably connected to the grouting hole (52) of the end limiting anchor head (5) by threads.
6. The through-embedded bar structure of the new beam and old column connection node according to claim 5, characterized in that: The grouting nozzle (6) is L-shaped and includes a grouting nozzle vertical section (61) and a grouting nozzle horizontal section (62). External threads are provided at the connecting end of the grouting nozzle horizontal section (62).
7. The through-embedded bar structure of the new beam and old column connection node according to claim 5, characterized in that: The grouting supplementary funnel (7) is an L-shaped with a horizontal fold, and includes a funnel vertical section (71) and a funnel horizontal section (72). External threads are provided at the connecting end of the funnel horizontal section (72).
8. The through-embedded bar structure of the new beam and old column connection node according to claim 1, characterized in that: The horizontal through-beam longitudinal reinforcement (2) and the end limiting anchor head (5) are connected by plug welding through holes.
9. The through-embedded rebar structure of the new beam and old column connection node according to claim 1, characterized in that: The inner side of the end limiting anchor head (5) is a plane, and the plane is in close contact with the side wall of the old building vertical frame structure (3) and is bonded through an adhesive layer (9). The adhesive layer (9) is a planting glue.