CN214837671U - Thread self-cutting anchor bolt for splicing wide bridge - Google Patents
Thread self-cutting anchor bolt for splicing wide bridge Download PDFInfo
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- CN214837671U CN214837671U CN202121274901.1U CN202121274901U CN214837671U CN 214837671 U CN214837671 U CN 214837671U CN 202121274901 U CN202121274901 U CN 202121274901U CN 214837671 U CN214837671 U CN 214837671U
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Abstract
A thread self-cutting anchor bolt for a wide-spliced bridge relates to the technical field of bridge building construction and comprises an anchor rod, a hexagonal head and self-tapping external threads; one end of the anchor rod is provided with a hexagonal head, and the diameter of the opposite side of the hexagonal head is equal to that of the anchor rod; the other end of the anchor rod is provided with self-tapping external threads, and the rod body of the anchor rod, which corresponds to the space between the hexagonal head and the self-tapping external threads, is a welding part with a polished rod structure; the anchor rod of the utility model is screwed into the anchoring hole pre-drilled on the hollow slab of the bridge, thus completing the anchoring, saving the construction operation time, saving time and labor, bearing the load earlier, having good durability, not being influenced by the environment temperature, and being capable of performing all-weather construction operation; the welding performance and the fireproof performance have little influence, and the steel bar is safer and more reliable than the traditional steel bar planting scheme.
Description
Technical Field
The utility model belongs to the technical field of bridge building construction technique and specifically relates to a piece together wide screw thread autogenous cutting crab-bolt for bridge.
Background
The existing bridge widening connection mostly adopts a chemical bar planting installation scheme, and anchoring connection is carried out by means of bar planting adhesive force; however, after the anchor bolt is anchored by using the common bar-planting glue, the anchor bolt cannot be welded with the embedded steel bar of the newly spliced wide bridge hollow slab, a special bar-planting glue is needed, the special bar-planting glue is not easy to identify, the use cost is high, the anchor bolt can only be used at the environment temperature of-5 ℃ to 40 ℃, the curing time is needed, and the construction efficiency is influenced; in addition, the anchoring scheme adopting the chemical bar planting has the hidden danger of glue aging, and the long-term performance is general, which is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to overcome not enough among the background art, the utility model discloses a piece together wide screw thread autogenous cutting crab-bolt for bridge.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a thread self-cutting anchor bolt for a wide splicing bridge comprises an anchor rod, a hexagonal head and self-tapping external threads; one end of the anchor rod is provided with a hexagonal head, and the diameter of the opposite side of the hexagonal head is equal to that of the anchor rod; the anchor rod other end is equipped with the self tapping external screw thread, and the anchor rod corresponds the pole body between hexagonal head and the self tapping external screw thread and is the welding part of polished rod structure.
Preferably, the ratio of the length of the welding part of the anchor rod body to the length of the self-tapping external thread section is 1.1-1.2: 1.
Preferably, one end of the anchor rod, which is far away from the hexagonal head, is of a bottom-cutting pointed structure.
Preferably, the anchor rod body is provided with a zinc coating.
Preferably, the head end layer of the self-tapping external thread has a saw-toothed structure.
Preferably, the anchor rod welding part is of a hexagonal prism structure corresponding to and consistent with a hexagonal head.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses a thread self-cutting anchor bolt for a width-splicing bridge, which has simple structure and lower production cost; when the self-tapping external thread section is used, the self-tapping external thread section can be screwed into the anchoring hole pre-drilled in the bridge hollow plate through the matching of the internal hexagonal wrench and the hexagonal head for anchoring, the anchoring is carried out by adopting the thread meshing principle, almost no expansion stress action exists, the self-tapping external thread section is suitable for installation occasions with small edge distance and small distance, and the self-tapping external thread section has the obvious advantage of vibration resistance; the anchor rod is screwed into the anchoring hole pre-drilled in the hollow slab of the bridge to complete anchoring, so that the construction operation time is saved, the time and the labor are saved, the load bearing durability can be realized earlier, the influence of the environmental temperature is avoided, and all-weather construction operation can be realized; the welding performance and the fireproof performance have little influence, and the steel bar is safer and more reliable than the traditional steel bar planting scheme.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a bolt weld;
fig. 3 is another schematic structural diagram of the present invention.
In the figure: 1. an anchor rod; 2. a hexagonal head; 3. and self-tapping external threads.
Detailed Description
The present invention will be explained in detail by the following embodiments, and it is to be understood that the present invention is intended to protect all technical improvements within the scope of the present invention, and in the description of the present invention, it is to be understood that if there are the terms "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, it is only corresponding to the drawings of the present application, and for the convenience of description of the present invention, it is not intended to indicate or imply that the device or element referred to must have a specific orientation.
With the attached drawings 1-3, the thread self-cutting anchor bolt for the wide-spliced bridge comprises an anchor rod 1, a hexagonal head 2 and self-tapping external threads 3; one end of the anchor rod 1 is provided with a hexagonal head 2, and the diameter of the opposite side of the hexagonal head 2 is equal to that of the anchor rod 1; the other end of the anchor rod 1 is provided with self-tapping external threads 3, and the rod body of the anchor rod 1 corresponding to the hexagonal head 2 and the self-tapping external threads 3 is a welding part with a polished rod structure, namely, the self-tapping external threads 3 can be screwed into a pre-drilled anchoring hole of a bridge hollow plate for anchoring through the matching of an inner hexagonal wrench and the hexagonal head 2, and the aperture of the anchoring hole is ensured to be equal to the rod diameter of the anchor rod 1; the diameter of the welding part of the anchor rod 1 is equal to the diameter of the opposite side of the hexagonal head 2, so that an operator can directly perform parallel seamless welding on the welding part of the anchor rod 1 and the embedded steel bar of the newly-spliced wide bridge hollow slab, the operation is convenient and fast, the construction efficiency is greatly improved, and the welding strength can be ensured;
in addition, the saw-toothed structure of the head end layer of the self-tapping external thread 3 can effectively cut concrete to form a groove, so that the tail end of the self-tapping external thread 3 can smoothly enter the anchoring hole to form mechanical biting force; the diameter of the anchor rod 1 can be 16mm, the total length can be 340mm, and the ratio of the length of the welding part of the rod body of the anchor rod 1 to the length of the self-tapping external thread 3 is 1.1-1.2: 1, so that the length of the welding part can be ensured to be about 180mm, the anchoring strength and the welding length can be effectively ensured, and the reliability of connection between an original bridge and a newly-spliced wide bridge is ensured; one end of the anchor rod 1, which is far away from the hexagonal head 2, is of a bottom-cutting pointed structure, so that an operator can conveniently screw the anchor rod 1 into an anchoring hole which is pre-drilled in a bridge hollow plate; the body of the anchor rod 1 is provided with a zinc coating, so that good antirust performance can be achieved, and the service life is prolonged; 1 welding part of stock is the hexagonal prism structure that corresponds unanimity with hexagonal head 2, can form great welding groove automatically after 1 welding part of stock coincides with the embedded steel bar of newly piecing together wide bridge hollow slab promptly, improves welding quality.
The thread self-cutting anchor bolt for the width-spliced bridge is implemented by using a steel bar detector to carry out nondestructive detection on a hollow slab of the bridge before installation, marking the surface of concrete and then carrying out positioning lofting by avoiding the position of a steel bar in the hollow slab of the bridge; drilling by using an electric hammer with a hammering function and a depth setting function; when drilling, the electric hammer is ensured to be vertical to the surface of the concrete; blowing out the powder in the hole by using a blowing cylinder, a blast hole cleaner and other equipment, and then cleaning the scum on the hole wall by using a brush or a steel brush until the finger belly does not feel obvious granular sensation when the hole wall is checked by touching with fingers; the use has the telescopic impacted style electric spanner of hexagonal to install, and it is downthehole with the anchor that 3 sections screw in bridge hollow slab of self tapping external screw threads were bored in advance to cooperate through interior hexagonal spanner and hexagonal head 2, until the naked eye range estimation all threads have buried in the anchor, can carry out parallel seamless welding with the embedded bar of the hollow slab of anchor bolt 1 welding part and the new wide bridge of piecing together.
The details of the present invention not described in detail are prior art, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a piece together wide screw thread autogenous cutting crab-bolt for bridge which characterized by: comprises an anchor rod (1), a hexagonal head (2) and self-tapping external threads (3); one end of the anchor rod (1) is provided with a hexagonal head (2), and the diameter of the opposite side of the hexagonal head (2) is equal to that of the anchor rod (1); the anchor rod (1) other end is equipped with self tapping external screw thread (3), and the shank that anchor rod (1) corresponds between hexagonal head (2) and self tapping external screw thread (3) is the welding part of polished rod structure.
2. The threaded self-cutting anchor for the split-width bridge as recited in claim 1, wherein: the ratio of the length of the welding part of the rod body of the anchor rod (1) to the length of the self-tapping external thread (3) is 1.1-1.2: 1.
3. The threaded self-cutting anchor for the split-width bridge as recited in claim 1, wherein: the anchor rod (1) deviates from one end of the hexagonal head (2) and is of a bottom-cutting pointed structure.
4. The threaded self-cutting anchor for the split-width bridge as recited in claim 1, wherein: the body of the anchor rod (1) is provided with a zinc coating.
5. The threaded self-cutting anchor for the split-width bridge as recited in claim 1, wherein: the head end layer of the self-tapping external thread (3) is of a sawtooth structure.
6. The threaded self-cutting anchor for the split-width bridge as recited in claim 1, wherein: the welding part of the anchor rod (1) is of a hexagonal prism structure corresponding to and consistent with the hexagonal head (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274901.1U CN214837671U (en) | 2021-06-08 | 2021-06-08 | Thread self-cutting anchor bolt for splicing wide bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121274901.1U CN214837671U (en) | 2021-06-08 | 2021-06-08 | Thread self-cutting anchor bolt for splicing wide bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837671U true CN214837671U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121274901.1U Active CN214837671U (en) | 2021-06-08 | 2021-06-08 | Thread self-cutting anchor bolt for splicing wide bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837671U (en) |
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2021
- 2021-06-08 CN CN202121274901.1U patent/CN214837671U/en active Active
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