CN212505858U - High-strength steel strand pre-stressed anchor plate tool - Google Patents
High-strength steel strand pre-stressed anchor plate tool Download PDFInfo
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- CN212505858U CN212505858U CN202020392194.5U CN202020392194U CN212505858U CN 212505858 U CN212505858 U CN 212505858U CN 202020392194 U CN202020392194 U CN 202020392194U CN 212505858 U CN212505858 U CN 212505858U
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Abstract
A high-strength steel strand pre-stressed anchor plate tool comprises a pre-stressed anchor plate (1) and a clamping piece (2), wherein the clamping piece (2) is arranged inside the pre-stressed anchor plate (1), the pre-stressed anchor plate (1) comprises an anchor plate body (11) and at least one taper hole (12), the anchor plate body (11) is a pie-shaped cylinder, the taper hole (12) penetrates through two end faces of the cylinder, and the axis of the taper hole is parallel to the axis of the anchor plate body (11); the taper hole (12) comprises a first taper hole (121) and a second taper hole (122), the first taper hole (121) and the second taper hole (122) are coaxially arranged and are connected in an end-to-end mode, and the first taper hole (121) is used for installing the clamping piece (2). The proper angle fit difference between the clamping piece and the anchor plate can provide enough anchoring force for the anchor plate clamping piece anchoring unit, and meanwhile, the internal shrinkage of the clamping piece under the condition of large load can be ensured not to exceed the specified range, and the prestress loss of an anchoring system is ensured to be optimal.
Description
Technical Field
The utility model relates to an anchorage device accessory, especially an anchor slab and clamping piece.
Background
At present, with the continuous promotion of bridge construction at home and abroad, the requirement on the bridge per se is higher and higher. On the premise of meeting the traffic requirement to the maximum extent, the use amount of engineering materials such as concrete, steel and the like is required to be reduced so as to achieve the purposes of reducing the construction cost, reducing the energy consumption and the like.
Meanwhile, for example, in China, with the continuous progress of infrastructure, roads are more and more dense, and lines with different traffic demands are overlapped in a crossed manner, such as crossing high-speed railway lines, overhead lines in cities and the like. When the routes are overlapped, strict requirements are provided for the bridge span, and the span of a part of viaduct bridges must be designed to be larger due to the limitation of construction conditions so as to meet the passing requirements of vehicles and ships under the bridges.
In the existing bridge, a prestressed system mainly aiming at reducing the section size of a member and increasing the span of the bridge cannot meet the engineering requirements slowly. The steel strand is used as the most common prestressed tendon in a prestressed system, is widely applied at home and abroad, and has the common specification of 1860MPa grade steel strands with the thickness of 1x 7-15.20 mm. The existing steel strand with the specification of 2400MPa level still needs a suitable anchor plate tool.
Disclosure of Invention
The utility model relates to a solve the blank problem of the supporting anchor slab instrument of 2400MPa level steel strand wires among the prior art, provide a high-strength steel strand wires prestressed anchorage board, through the deformation groove, the angle change of the angle increase cooperation clamping piece of taper hole for steel strand wires's anchor coefficient, clamping piece return volume of contracting etc. and satisfy the standard requirement and solved above-mentioned problem.
The utility model provides a high-strength steel strand wires prestressed anchorage board instrument, including prestressed anchorage board and clamping piece, the clamping piece sets up inside prestressed anchorage board, and prestressed anchorage board includes anchor board body and at least one taper hole, and the anchor board body is the pie cylinder, and the taper hole runs through cylinder both ends face and the axis is parallel with anchor board body axis; the taper hole comprises a first taper hole and a second taper hole, the first taper hole and the second taper hole are coaxially arranged and are connected at the head, and the first taper hole is used for installing the clamping piece.
The high-strength anchor plate is cylindrical; the end surface of the cylindrical anchor plate is provided with conical holes with different numbers according to different models; the taper hole is divided into two parts; the first taper hole is a taper hole matched with the clamping piece and is matched with the external taper of the tapered clamping piece; the angle fit difference is 10 '-50' different from that of the common anchor plate; the proper angle fit difference between the clamping piece and the anchor plate can provide enough anchoring force for the anchor plate clamping piece anchoring unit, and meanwhile, the internal shrinkage of the clamping piece under the condition of large load can be ensured not to exceed the specified range, the prestress loss of an anchoring system is ensured to be optimal, and the requirement on fatigue performance is met. And the clamping piece can not produce overweight bite marks on the steel strand while the anchoring system is ensured to have higher anchoring efficiency coefficient.
A high-strength steel strand wires prestressed anchorage board instrument, as preferred mode, the clamping piece includes clamping piece body and the deformation groove that two sizes are the same, the clamping piece body is provided with the hollow toper of through-hole for the center, through-hole and toper coaxial line, through-hole maximum diameter is less than and is equal to toper minimum diameter, two deformation grooves set up respectively in the toper position of going to the bottom, deformation groove direction is parallel with the toper axis, two deformation groove axes set up for symmetry axis symmetry.
The high-strength clamping piece forms two petal type conical clamping pieces through a deformation groove; the shape taper of the clamping piece is matched with the taper hole of the anchor plate; the external angle of the conical clamping piece is 12-14 degrees; the inner hole of the clamping piece is provided with a screw thread; the pitch of the screw teeth is 1.15-1.3 mm; the length of the clamping piece is 40-50 mm; a deformation groove is formed in the large-diameter position of the conical clamping piece along the longitudinal direction; the width of the deformation groove is 0-4 mm, the length of the deformation groove is 0-25 mm, the clamping piece can be guaranteed to have enough deformability when high stress is applied, so that the high stress applied to the clamping piece by the anchorage device and the steel strand can be released, and meanwhile, the steel strand can be clamped more uniformly through self deformation.
A high strength steel strand wires prestressed anchorage board instrument, as preferred mode, clamping piece body minor diameter position through-hole is the toper through-hole that enlarges from inside to outside.
A high strength steel strand wires prestressed anchorage board instrument, as preferred mode, the toper through-hole angle is 0 ~ 12.
The inner hole at the small diameter part of the conical clamping piece is processed into a conical shape which is expanded from inside to outside; the taper angle is 0-12 degrees; the stress release cone added at the small diameter part of the clamping piece can ensure that the clamping piece is not damaged due to the large stress brought to one side of the clamping piece by the deflection of the steel strand when the anchor device is matched with an anchor backing plate for use, and simultaneously ensures the static load anchoring efficiency coefficient and the fatigue performance of the anchoring system.
A high strength steel strand wires prestressed anchorage board instrument, as preferred mode, the through-hole inner wall is provided with the thread.
A high-strength steel strand wires prestressed anchorage board instrument, as preferred mode, first taper hole is the same with second taper hole hookup location diameter, the diameter of first taper hole and second taper hole junction circle is first taper hole minimum diameter and second taper hole minimum diameter.
A high-strength steel strand wires prestressed anchorage board instrument, as preferred mode, the angle cooperation difference between first taper hole and the clamping piece body is 10 '~ 50'.
A high strength steel strand wires prestressed anchorage board instrument, as preferred mode, be provided with the cylinder through-hole between first taper hole and the second taper hole, cylinder through-hole diameter is the same with first taper hole minimum diameter and second taper hole minimum diameter.
The second taper hole takes the opposite end surface of the clamping piece mounting end surface as a stress release taper hole of a large-diameter end; the angle of the stress release taper hole is 0-15 degrees; the small-diameter end of the stress release taper hole is the same as the small-diameter end of the first taper hole in diameter; the first release taper hole and the second release taper hole are connected through the straight hole, the stress release taper hole additionally arranged on the anchor plate can also reduce the shearing force of the anchorage device on the steel strand caused by the installation deflection of the steel strand, and therefore the high-strength steel strand is prevented from being damaged by the shearing force on the steel strand caused by high stress and steel strand deflection in the using process.
A high-strength steel strand wires prestressed anchorage board instrument, as preferred mode, be provided with the clamping piece draw-in groove on the inboard side of clamping piece body maximum diameter, the clamping piece draw-in groove is the annular groove of centre of a circle on the axis.
The clamping piece is arranged in the prestressed anchor backing plate taper hole, the steel strand is arranged in the clamping piece through hole, the maximum diameter of the first taper hole is towards the direction opposite to the direction of the simply supported beam bridge body, and the anchor plate is attached to the anchor backing plate pre-embedded on the bridge body, so that anchoring is achieved.
The utility model discloses beneficial effect as follows:
(1) the clamping piece is a two-piece conical clamping piece, so that the clamping piece has enough deformation capacity to release high stress brought by the anchor and the steel strand to the clamping piece when the stress is high, and the steel strand can be clamped more uniformly through self deformation;
(2) the inner hole at the small diameter part of the conical clamping piece is processed into a conical shape which is expanded from inside to outside, and the stress release cone which is added at the small diameter part of the clamping piece can ensure that the clamping piece can not be damaged due to the large stress brought to one side of the clamping piece by the deflection of a steel strand when the clamping piece is matched with an anchorage device and an anchor backing plate for use, and simultaneously ensure the static load anchoring efficiency coefficient and the fatigue performance of an anchoring system;
(3) the proper angle fit difference between the clamping piece and the anchor plate can provide enough anchoring force for the anchoring unit of the clamping piece of the anchor plate, and meanwhile, the internal shrinkage of the clamping piece under the condition of large load can be ensured not to exceed a specified range, and the prestress loss of an anchoring system is ensured to be optimal;
(4) the first release taper hole and the second release taper hole are connected through the straight hole, the stress release taper hole additionally arranged on the anchor plate can also reduce the shearing force of the anchorage device on the steel strand caused by the installation deflection of the steel strand, and therefore the high-strength steel strand is prevented from being damaged by the shearing force on the steel strand caused by high stress and steel strand deflection in the using process.
Drawings
FIG. 1 is a schematic view of a high-strength steel strand pre-stressed anchor plate tool;
FIG. 2 is a longitudinal sectional view of a prestressed anchor plate of a high-strength steel strand prestressed anchor plate tool;
FIG. 3 is a schematic view of a taper hole of a high-strength steel strand pre-stressed anchor plate tool;
fig. 4 is a schematic view of a high-strength steel strand pre-stressed anchor plate tool clamping piece.
Reference numerals:
1. a pre-stressed anchor plate; 11. an anchor plate body; 12. a taper hole; 121. a first taper hole; 122. a second taper hole; 123. a cylindrical through hole 2 and a clamping piece; 21. a clip body; 22. a deformation groove; 23. And a clamping groove of the clamping piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
A high-strength steel strand pre-stressed anchor plate tool comprises a pre-stressed anchor plate 1 and clamping pieces 2, wherein the clamping pieces 2 are arranged inside the pre-stressed anchor plate 1.
As shown in FIG. 2, the prestressed anchor slab 1 comprises an anchor slab body 11 and at least one taper hole 12, wherein the anchor slab body 11 is a pie-shaped cylinder, the taper hole 12 penetrates through two end faces of the cylinder, and the axis of the taper hole is parallel to the axis of the anchor slab body 11
As shown in fig. 3, the taper hole 12 includes a first taper hole 121 and a second taper hole 122, the first taper hole 121 and the second taper hole 122 are coaxially disposed and connected end to end, and the first taper hole 121 is used for installing the clip 2. The diameters of the connecting positions of the first taper hole 121 and the second taper hole 122 are the same, and the diameters of the circles at the connecting positions of the first taper hole 121 and the second taper hole 122 are the minimum diameter of the first taper hole 121 and the minimum diameter of the second taper hole 122.
A cylindrical through hole 123 is arranged between the first taper hole 121 and the second taper hole 122, and the diameter of the cylindrical through hole 123 is the same as the minimum diameter of the first taper hole 121 and the minimum diameter of the second taper hole 122.
As shown in fig. 4, the clip 2 includes a clip body 21 and two deformation grooves 22 with the same size, the clip body 21 is a hollow cone with a through hole in the center, the through hole and the cone are coaxial, the maximum diameter of the through hole is smaller than or equal to the minimum diameter of the cone, the two deformation grooves 22 are respectively arranged at the bottom of the cone, the direction of the deformation groove 22 is parallel to the axis of the cone, and one axis of the two deformation grooves 22 is symmetrically arranged for a symmetry axis.
The through hole at the small diameter position of the clip body 21 is a tapered through hole which is enlarged from inside to outside. The angle of the conical through hole is 0-12 degrees. The inner wall of the through hole is provided with screw teeth. A clamping piece clamping groove 23 is formed in the side face of the inner side of the maximum diameter of the clamping piece body 21, and the clamping piece clamping groove 23 is an annular groove with the circle center on the axis.
The angular fitting difference between the first taper hole 121 and the clip body 21 is 10 'to 50'.
The carburizing process of the clamping piece 2 increases the hardness of the high-strength clamping piece 2 by 8-16HRC compared with the common clamping piece; the clamping piece and the steel strand can be guaranteed to have enough engaging force, the body of the steel strand cannot be damaged, and therefore the limit tension of the steel strand is reduced, and meanwhile the clamping piece can be guaranteed to have enough anchoring force due to the proper length of the clamping piece.
The experimental parameters of this example are as follows:
static load test:
the anchoring efficiency coefficient reaches more than 0.97, the steel strand is not broken, the exposed amount of the clamping piece is 1.5-3mm, parts such as an anchor plate, the clamping piece and the like are not abnormal, and the elongation rate reaches more than 2.5%.
And (3) fatigue test:
single steel strand fatigue test: the upper limit of the stress is 70 percent of the actual maximum force, the stress amplitude is 190MPa, the times are 200 ten thousand, and the steel strand is not broken.
Fatigue of an anchorage assembly part: the upper limit of the stress is 65 percent of the standard value of the tensile strength of the steel strand, the stress amplitude is 100MPa, the times are 200 ten thousand, the steel strand is not broken, and the anchor plate, the clamping piece and the like are not abnormal.
And (3) a bite mark test: the clamping piece bite marks are observed by using load stretching anchorage device assembly parts with the grades of 0.2, 0.4, 0.6, 0.7 and 0.8 of the nominal breaking force of the steel strands, and are clear, complete and uniform.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a high-strength steel strand wires prestressed anchorage board instrument which characterized in that: the clamping piece (2) is arranged inside the prestressed anchor plate (1), the prestressed anchor plate (1) comprises an anchor plate body (11) and at least one taper hole (12), the anchor plate body (11) is a pie-shaped cylinder, the taper hole (12) penetrates through two end faces of the cylinder, and the axis of the taper hole is parallel to the axis of the anchor plate body (11); the taper hole (12) comprises a first taper hole (121) and a second taper hole (122), the first taper hole (121) and the second taper hole (122) are coaxially arranged and are connected in an end-to-end mode, and the first taper hole (121) is used for installing the clamping piece (2).
2. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 1, wherein: the clamping piece (2) comprises a clamping piece body (21) and two deformation grooves (22) with the same size, wherein the clamping piece body (21) is provided with a hollow cone of a through hole as the center, the through hole is coaxial with the cone, the maximum diameter of the through hole is smaller than or equal to the minimum diameter of the cone, the deformation grooves (22) are respectively arranged at the bottom of the cone, the direction of the deformation grooves (22) is parallel to the axis of the cone, and the axis of the deformation grooves (22) is symmetrically arranged by a symmetry axis.
3. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 2, wherein: the through hole at the small diameter position of the clamping piece body (21) is a conical through hole which is enlarged from inside to outside.
4. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 3, wherein: the angle of the conical through hole is 0-12 degrees.
5. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 2, wherein: the inner wall of the through hole is provided with screw teeth.
6. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 2, wherein: the diameters of the connecting positions of the first taper hole (121) and the second taper hole (122) are the same, and the diameter of a circle at the connecting position of the first taper hole (121) and the second taper hole (122) is the minimum diameter of the first taper hole (121) and the minimum diameter of the second taper hole (122).
7. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 6, wherein: the angle fit difference between the first taper hole (121) and the clip body (21) is 10 'to 50'.
8. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 1, wherein: a cylindrical through hole (123) is arranged between the first taper hole (121) and the second taper hole (122), and the diameter of the cylindrical through hole (123) is the same as the minimum diameter of the first taper hole (121) and the minimum diameter of the second taper hole (122).
9. The tool for the prestressed anchor plate of the high-strength steel strand as claimed in claim 2, wherein: the clamping piece clamping groove is characterized in that a clamping piece clamping groove (23) is formed in the side face of the inner side of the maximum diameter of the clamping piece body (21), and the clamping piece clamping groove (23) is an annular groove with the circle center on the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020392194.5U CN212505858U (en) | 2020-03-25 | 2020-03-25 | High-strength steel strand pre-stressed anchor plate tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020392194.5U CN212505858U (en) | 2020-03-25 | 2020-03-25 | High-strength steel strand pre-stressed anchor plate tool |
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| CN212505858U true CN212505858U (en) | 2021-02-09 |
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| CN202020392194.5U Active CN212505858U (en) | 2020-03-25 | 2020-03-25 | High-strength steel strand pre-stressed anchor plate tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115229971A (en) * | 2022-08-30 | 2022-10-25 | 北京城建设计发展集团股份有限公司 | Pretensioned prestressed concrete U-shaped beam adopting broken line reinforcement |
-
2020
- 2020-03-25 CN CN202020392194.5U patent/CN212505858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115229971A (en) * | 2022-08-30 | 2022-10-25 | 北京城建设计发展集团股份有限公司 | Pretensioned prestressed concrete U-shaped beam adopting broken line reinforcement |
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