Tail end expansion embedded steel bar reinforcing structure and construction method
By setting dense silk teeth and expansion screws at the end of the steel bar, the problem of unstable structure of the implanted steel bar is solved, and a better anchoring effect is achieved, ensuring a stable connection between the steel bar and the substrate.
Patent Information
- Application Number
- CN202510667645.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2025-07-04
AI Technical Summary
The existing planting rib structure and substrate are not stable enough, resulting in the steel bars being easily pulled out, affecting the reinforcement effect and endangering the safety of the building.
The end expansion implantation reinforcement structure is adopted, including the main body of the steel bar and the expansion screw. By setting dense thread parts and expansion screws at the end of the steel bar, the expansion screws are closely connected to the hole wall when rotating, increasing the tension area at the top and improving the anchoring effect.
Through the dense silk teeth and expansion screw design, the grip and wrapping force between the implanted reinforcement glue and the steel bar is enhanced, the connection stability between the steel bar and the substrate is improved, the resistance is increased, and the reinforcement effect is significantly improved.
Smart Images
Figure CN120250967A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of anchoring connectors and construction methods for building construction, and in particular to a terminal expansion rebar reinforcement structure and a construction method thereof. Background Art
[0002] With the continuous development of the construction industry in China, the area of newly built buildings in the country has reached its peak, and the reinforcement and renovation of existing buildings will become an important business in the construction industry. During the reinforcement and renovation process, the rebar planting and storey-adding technology is often used to meet the requirements of changing the use function of buildings. The "rebar planting" technology is a relatively simple and effective connection and anchoring technology for concrete structures, and is widely used in all aspects of construction engineering.
[0003] Existing rebar planting usually involves drilling holes in substrates such as concrete, wall rocks, etc., then injecting high-strength rebar planting glue, and then inserting steel bars or profiles. After the glue cures, the steel bars are bonded to the substrate as a whole. In the actual construction process, due to drilling with a drill bit, the hole wall is smooth, and the connection between the steel bar and the main body of the building structure completely relies on the rebar planting glue. If the rebar planting structure is not firmly adhered, the steel bar is very easy to be pulled out, thus affecting the reinforcement effect and even endangering the overall safety of the building. Therefore, it is particularly urgent to develop a rebar planting structure that is simple in structure, durable and easy to use and a reinforcement construction method for the rebar planting structure. Summary of the Invention
[0004] In view of this, the present invention provides a terminal expansion rebar reinforcement structure and a construction method, aiming to solve the problem that the existing rebar planting reinforcement structure is not stable enough with the substrate.
[0005] To achieve the above object, on the one hand, the present invention provides a terminal expansion rebar reinforcement structure, including a steel bar main body, a threaded part and an expansion screw. The steel bar main body is connected to the threaded part. The expansion screw includes a top cap, expansion petals and a matching head. The expansion petals connect the top cap and the matching head. The matching head is detachably connected to the threaded part by a thread.
[0006] Preferably, it includes a plurality of expansion screws. At least a part of the top caps of the expansion screws are provided with threads matching the threaded part, and the top caps are detachably connected to the threaded part by a thread.
[0007] Preferably, one expansion screw is arranged at the end of the threaded part, at least one expansion screw is arranged in the middle of the threaded part, and a fastening screw is further provided between the expansion screw arranged at the end of the threaded part and the expansion screw arranged in the middle of the threaded part.
[0008] Preferably, the top cap of the expansion screw disposed at the end of the thread portion is not provided with threads, and the top cap of the expansion screw disposed at the middle of the thread portion is provided with threads.
[0009] Preferably, a pre-folded angle is provided in the middle of the expansion petals, and the steel bar body and the thread portion are integrally formed.
[0010] On the other hand, a terminal expansion reinforcement construction method is provided, the method comprising the following steps:
[0011] Step 1, locate the main reinforcement in the base material, stagger the main reinforcement position and mark the drilling position;
[0012] Step 2, opening a reinforcing bar hole at the drilling position;
[0013] Step 3, removing dust and impurities in the rebar planting hole;
[0014] Step 4, preparing a terminal expansion reinforcement structure as described in any one of claims 1 to 3;
[0015] Step 5, preparing a reinforcing bar embedding glue, and injecting the reinforcing bar embedding glue into the reinforcing bar embedding hole;
[0016] Step 6, driving the terminal expansion reinforcement structure into the reinforcement hole, ensuring that it is in close contact with the wall of the reinforcement hole, twisting the terminal expansion reinforcement structure to cause the expansion screw to expand and deform and be tightly engaged with the wall of the reinforcement hole;
[0017] Step 7, clean and scrape off the rebar embedding glue overflowing from the rebar embedding holes and carry out curing and maintenance.
[0018] Preferably, in step 1, a steel bar scanner is used to measure and locate the position of the main reinforcement in the substrate, and in step 2, an impact drill is used to open reinforcement holes perpendicular to the plane of the substrate, and the inclination of the reinforcement holes relative to the plane of the substrate is not greater than 8 degrees.
[0019] Preferably, in step 3, a blower, a brush and an industrial endoscope are used to remove dust and impurities in the hole to ensure that the hole is clean and free of dust, oil and organic impurities.
[0020] Preferably, in step 4, the end expansion reinforcement structure is prepared by a steel bar thread rolling machine, and the steps include:
[0021] S1: Remove rust and oil stains on the surface of the steel bar to ensure that the surface of the steel bar is clean;
[0022] S2: using a steel bar thread rolling machine to form the thread thread portion at the end of the steel bar for implanting the steel bar hole, and processing the steel bar into a shape in which the end is the thread thread portion and the rest is the main body of the steel bar;
[0023] S3: Socket the expansion screw at the end of the thread part.
[0024] Preferably, in the step 5, the step of preparing the planting reinforcement glue includes:
[0025] S4: Prepare the planting reinforcement glue. The planting reinforcement glue is an AB two-component planting reinforcement glue, and the weight ratio of component A to component B is 4:1. The error of the weight ratio shall not exceed 3%.
[0026] S5: Stir the component A and component B glue evenly, then prepare according to the ratio, and stir with an electric mixer for 3 minutes.
[0027] The beneficial effects of the present invention are:
[0028] The end-expansion planting reinforcement reinforcement structure and construction method of the present application roughen the local surface of the steel bar by setting a thread part at the end of the steel bar. The dense threads can improve the bonding force between the planting reinforcement glue and the steel bar, so as to achieve the effect of strengthening the anchoring effect of the steel bar. By setting an expansion screw at the end of the steel bar, when the present application is subjected to a rotational force, the expansion screw will form an enlarged expansion structure, and this expansion structure will be tightly clamped with the hole wall later, increasing the tensile area at the top, increasing the resistance, and greatly improving the steel bar anchoring effect in combination with the planting reinforcement glue. Description of the Drawings
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0030] Figure 1 It is the overall structure schematic diagram of an end-expansion planting reinforcement reinforcement structure of the present invention;
[0031] Figure 2 It is the structure schematic diagram of the expansion screw of an end-expansion planting reinforcement reinforcement structure of the present invention;
[0032] Figure 3 It is the overall structure schematic diagram of another embodiment of an end-expansion planting reinforcement reinforcement structure of the present utility model;
[0033] Figure 4 It is the installation schematic diagram of an end-expansion planting reinforcement reinforcement structure of the present invention and the base material;
[0034] Figure 5 It is the process schematic diagram of an end-expansion planting reinforcement reinforcement construction method of the present invention;
[0035] In the figure:
[0036] 1 - Steel bar main body; 2 - Threaded part; 3 - Expansion screw; 31 - Top cap; 32 - Expansion petals; 33 - Matching head; 34 - Pre - folded angle;
[0037] 4 - Base material; 41 - Rebar planting hole;
[0038] 5 - Rebar planting glue. Specific implementation manner
[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.
[0041] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0042] Refer to Figures 1-4 , which shows an end - expansion rebar reinforcement structure, including a steel bar main body 1, a threaded part 2 and an expansion screw 3. The steel bar main body 1 and the threaded part 2 are connected. The expansion screw 3 includes a top cap 31, expansion petals 32 and a matching head 33. The expansion petals 32 connect the top cap 31 and the matching head 33, and the matching head 33 is detachably connected to the threaded part 2 through threads.
[0043] In this application, it is preferably to process the steel bars that meet the specifications through a steel bar rolling machine, process the head of the steel bar into threads, and then sleeved with the expansion screw 3. The advantage of this method is that both the steel bar main body 1 and the threaded part 2 are processed in one steel bar, and the integrity and anti - bending performance are better. Of course, the steel bar main body 1 and the threaded part 2 can also be processed separately and then connected together by high - speed rotation hot - melting technology.
[0044] The thread part 2 is obtained by roughening the local surface of the steel bar. The dense threads can improve the bonding force between the implanting glue 5 and the steel bar, so as to enhance the effect of reinforcing the anchorage of the steel bar.
[0045] The expansion principle of the expansion screw 3 of the present application is that when the steel bar main body 1 rotates, the top cap 31 of the expansion screw 3 arranged at the end of the thread part 2 abuts against the thread part 2 and then stops advancing. However, the matching head 33 has threads. When the steel bar main body 1 rotates, it will further advance forward and thus squeeze the expansion petals 32.
[0046] The usage mode of the present application is as Figure 4 shown. Drill a rebar planting hole 41 of appropriate size in a base material 4 such as concrete or wall rock, then inject the implanting glue 5, and insert the end expansion rebar reinforcement structure of the present application into the rebar planting hole 41. By rotating the steel bar main body 1, the expansion screw 3 is stressed, and the expansion petals 32 will be squeezed and spread outwards, forming an expansion screw 3 with a larger diameter. The expansion petals 32 will then be tightly clamped with the hole wall, increasing the tensile area at the top, increasing the resistance, and greatly improving the rebar anchorage effect in combination with the implanting glue 5.
[0047] In some embodiments, as Figure 3 shown, the end expansion rebar reinforcement structure includes a plurality of expansion screws 3. At least a part of the top caps 31 of the expansion screws 3 are provided with threads matching the thread part 2, and the top caps 31 and the thread part 2 are detachably connected by the threads. By increasing the number of expansion screws 3, a plurality of expansion structures will be formed after rotation, further enhancing the reinforcement effect of the end expansion rebar reinforcement structure on the base materials 4 such as concrete and wall rock.
[0048] In some preferred embodiments, as Figure 3As shown, an expansion screw 3 is disposed at the end of the threaded portion 2, and at least one expansion screw 3 is disposed in the middle of the threaded portion 2. In this way, at least two expansion screws 3 are provided in the end expansion and rebar reinforcement structure, forming two expansion structures. This method is both economical and can obtain good reinforcement effects. Specifically, the top cap 31 of the expansion screw 3 disposed at the end of the threaded portion 2 is not threaded, and the top cap 31 of the expansion screw 3 disposed in the middle of the threaded portion 2 is threaded. When the rebar rotates, since the top cap 31 of the expansion screw 3 disposed at the end of the threaded portion 2 is not threaded, it will not advance further when the rebar rotates to the top cap 31, but the mating head 33 has threads and will advance further to squeeze the expansion petals 32. Finally, an expansion structure can be obtained at the end of the threaded portion 2. For the expansion screw 3 in the middle, there are two expansion methods: In the first case, the top cap 31 of the expansion screw 3 in the middle will stop advancing due to the forward resistance in the threaded portion 2, but the mating head 33 has threads and will advance further to squeeze the expansion petals 32, forming an expansion structure; In the second case, the top cap 31 of the expansion screw 3 in the middle will continue to advance until it abuts against the expansion screw 3 at the end. Since the expansion screw 3 at the end will hinder the advancement of the top cap 31 of the expansion screw 3 in the middle, at this time, the mating head 33 continues to advance to squeeze the expansion petals 32, forming an expansion structure.
[0049] In some embodiments, a fastening screw is further provided between the expansion screw 3 disposed at the end of the threaded portion 2 and the expansion screw 3 disposed in the middle of the threaded portion 2. Due to the existence of the aforementioned second case, in order to avoid forming all the expansion screws 3 at the end, a fastening screw can be installed at the position where an expansion structure needs to be formed. The existence of the fastening screw will hinder the advancement of the top cap 31 of the expansion screw 3 in the middle, and finally squeeze the expansion petals 32 at the fastening screw to form an expansion structure.
[0050] In some embodiments, as Figure 2 shown, a pre-fold angle 34 is provided in the middle of the expansion petals 32. The provision of the pre-fold angle 34 facilitates the folding and expansion of the expansion screw 3 along a preset position and can also ensure that the expansion structure obtains a larger expansion diameter.
[0051] In some embodiments, as Figure 1 shown, the rebar main body 1 and the threaded portion 2 are integrally formed. As described above, the integrally formed end expansion and rebar reinforcement structure is processed by passing a qualified rebar through a rebar rolling machine, processing the head of the rebar into threads, and then sleeving the expansion screw 3. The advantage of this method is that both the rebar main body 1 and the threaded portion 2 are processed in one rebar, and the integrity and anti-bending performance are better.
[0052] Refer to Figure 5, shows a terminal expansion reinforcement construction method, comprising the following steps:
[0053] Step 1, locate the main reinforcement in the substrate 4, stagger the main reinforcement position and mark the drilling position. In this embodiment, first pop up the outer frame line of the range where the substrate 4 needs to be planted, and then use the steel bar scanner to scan the main reinforcement position horizontally at the ink line on the top of the substrate 4, mark the vertical main reinforcement line, and finally stagger the vertical ink line position of the main reinforcement, and mark the positioning of the planting hole 41 with a large pen according to the spacing designed in the drawing. Through the measurement and positioning of the steel bar scanner, the planting position is pre-determined, the accuracy of the hole opening is improved, the positioning error is reduced, the main reinforcement of the pile body is avoided, the drilling is successful at one time, and repeated damage to the pile body is avoided. And compared with the traditional blind man touching the elephant and repeatedly digging, the steel bar scanner plans the measurement and positioning in advance, the planting of the reinforcement is successful at one time, and the hole opening has a basis to rely on, which greatly improves the construction efficiency, reduces the difficulty of workers' construction operations, and saves a lot of construction time.
[0054] Step 2: Open a reinforcing bar hole 41 at the drilling position. The reinforcing bar hole 41 can be opened perpendicularly to the plane of the substrate 4 using an impact drill, and the inclination of the reinforcing bar hole 41 relative to the plane of the substrate 4 is not greater than 8 degrees.
[0055] Step 3, remove dust and impurities in the rebar hole 41. In this embodiment, a blower and a brush are first used to remove dust and impurities in the hole to ensure that the hole is clean and free of dust, oil and organic impurities, and then an endoscope is used to inspect the bottom of the hole to ensure that it is cleaned in place. The endoscope can greatly improve the accuracy of observing and judging the bottom state of the hole, improve the quality of hole cleaning, and is particularly suitable for deep hole operations.
[0056] Step 4, preparing a terminal expansion reinforcement structure in the above embodiment by a steel bar thread rolling machine, the steps comprising:
[0057] S1: Use 32mm diameter grade 3 rebar and use a grinder to remove rust and oil from the surface of the rebar to ensure that the surface of the rebar is clean. If the rebar is too long, it can be cut before removing rust and oil.
[0058] S2: A steel bar thread rolling machine is used to form the thread portion 2 at the end of the steel bar for implanting the steel bar hole 41, and the steel bar is processed into a shape in which the end is the thread portion 2 and the rest is the steel bar body 1. The length of the thread portion 2 should be less than or equal to the depth of the steel bar hole 41.
[0059] S3: Sleeve the expansion screw 3 at the end of the thread portion 2.
[0060] Step 5, prepare the rebar embedding glue 5, and inject the rebar embedding glue 5 into the rebar embedding hole 41. The step of preparing the rebar embedding glue 5 includes:
[0061] S4: Prepare the rebar planting adhesive 5. The rebar planting adhesive 5 is an AB two-component rebar planting adhesive, and the weight ratio of component A to component B is 4:1, and the weight ratio error shall not exceed 3%. In this embodiment, the AB two-component rebar planting adhesive uses an epoxy-based rebar planting adhesive of the prior art.
[0062] S5: Stir the component A and component B adhesives evenly, and then prepare them in proportion, and stir with an electric mixer for 3 minutes.
[0063] When preparing the rebar planting adhesive 5, it shall be operated according to the product instruction manual and detailed records shall be made of the amount of adhesive prepared, the using parts, time, curing condition, etc.
[0064] Step 6, drive a terminal-expanded rebar reinforcement structure into the rebar planting hole 41 to ensure that it is in close contact with the wall of the rebar planting hole 41, and twist the terminal-expanded rebar reinforcement structure to cause the expansion screw 3 to undergo expansion deformation and be tightly clamped with the wall of the rebar planting hole 41.
[0065] It should be noted that the preparation of the rebar planting adhesive, the injection of the rebar planting adhesive in step 5 and the driving of the terminal-expanded rebar reinforcement structure into the rebar planting hole 41 in step 6 must be carried out in a flowing operation and continuously.
[0066] Step 7, clean and scrape off the rebar planting adhesive overflowing from the rebar planting hole 41 and carry out curing maintenance. After the terminal-expanded rebar reinforcement structure is implanted into the rebar planting hole 41, it shall be protected during the curing maintenance of the rebar planting adhesive to avoid collision and displacement of the steel bars, and at least 3 days shall be maintained to ensure that the colloid is completely cured before it can be stressed.
[0067] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A terminal-expanded post-inserted reinforcement structure, characterized in that It includes a steel bar body, a threaded portion and an expansion screw, wherein the steel bar body is connected to the threaded portion, and the expansion screw includes a top cap, expansion petals and a matching head, wherein the expansion petals connect the top cap and the matching head, and the matching head is detachably connected to the threaded portion through threads.
2. The end-expanded rebar planting reinforcement structure according to claim 1, characterized in that, It comprises a plurality of expansion screws, wherein the top caps of at least a part of the expansion screws are provided with threads matching the threaded portion, and the top caps are detachably connected to the threaded portion through the threads.
3. The end-expanded rebar planting reinforcement structure according to claim 2, characterized in that, One expansion screw is arranged at the end of the thread portion, at least one expansion screw is arranged in the middle of the thread portion, and a fastening screw is also provided between the expansion screw arranged at the end of the thread portion and the expansion screw arranged in the middle of the thread portion.
4. The end-expanded post-inserted bar reinforcement structure according to claim 3, characterized in that, The top cap of the expansion screw disposed at the end of the threaded portion is not provided with threads, and the top cap of the expansion screw disposed at the middle of the threaded portion is provided with threads.
5. The end-expanded post-inserted rebar reinforcement structure according to claim 1, characterized in that, A pre-folded angle is arranged in the middle of the expansion petals, and the steel bar body and the threaded part are integrally formed.
6. A construction method for end-expansion post-inserted bar reinforcement, characterized in that, The method comprises the following steps: Step 1, locate the main reinforcement in the base material, stagger the main reinforcement position and mark the drilling position; Step 2, opening a reinforcing bar hole at the drilling position; Step 3, removing dust and impurities in the rebar planting hole; Step 4, preparing a terminal expansion reinforcement structure as described in any one of claims 1 to 5; Step 5, preparing a reinforcing bar embedding glue, and injecting the reinforcing bar embedding glue into the reinforcing bar embedding hole; Step 6, driving the terminal expansion reinforcement structure into the reinforcement hole to ensure that it is in close contact with the wall of the reinforcement hole, twisting the terminal expansion reinforcement structure to cause the expansion screw to expand and deform and be tightly engaged with the wall of the reinforcement hole; Step 7, clean and scrape off the rebar embedding glue overflowing from the rebar embedding holes and carry out curing and maintenance.
7. A construction method for end-expansion post-inserted rebar reinforcement according to claim 6, characterized in that, In step 1, a steel bar scanner is used to measure and locate the main reinforcement position in the substrate. In step 2, an impact drill is used to open a reinforcement hole perpendicular to the substrate plane, and the inclination of the reinforcement hole relative to the substrate plane is not greater than 8 degrees.
8. A construction method for end-expansion post-inserted rebar reinforcement according to claim 6, characterized in that, In step 3, dust and impurities in the hole are removed using a blower, a brush, and an industrial endoscope to ensure that the hole is clean and free of dust, oil, and organic impurities.
9. A construction method for end-expansion rebar planting reinforcement according to claim 6, characterized in that, In step 4, the end expansion reinforcement structure is prepared by a steel bar thread rolling machine, and the steps include: S1: Remove rust and oil stains on the surface of the steel bar to ensure that the surface of the steel bar is clean; S2: using a steel bar thread rolling machine to form the thread thread portion at the end of the steel bar for implanting the steel bar hole, and processing the steel bar into a shape in which the end is the thread thread portion and the rest is the main body of the steel bar; S3: Sleeve the expansion screw at the end of the thread portion.
10. A construction method for end-expansion post-inserted bar reinforcement according to claim 6, characterized in that, In step 5, the step of preparing the reinforcing bar glue comprises: S4: Prepare anchor glue, which is a two-component anchor glue of AB, with a weight ratio of component A to component B of 4:1, and the weight ratio error shall not exceed 3%. S5: Mix component A and component B glue evenly, then mix them according to the proportion and stir them with an electric mixer for 3 minutes.