CN216074746U - Anchor plate of clip type group anchor structure and large-diameter steel strand inhaul cable - Google Patents
Anchor plate of clip type group anchor structure and large-diameter steel strand inhaul cable Download PDFInfo
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- CN216074746U CN216074746U CN202121666919.6U CN202121666919U CN216074746U CN 216074746 U CN216074746 U CN 216074746U CN 202121666919 U CN202121666919 U CN 202121666919U CN 216074746 U CN216074746 U CN 216074746U
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Abstract
The anchor plate of the tension end anchorage and the anchor plate of the fixed end anchorage are anchor plates of the clamping piece type group anchor structure, the taper hole of the anchor plate has a deflection angle alpha m around the central taper hole, the taper hole deflection angle alpha m of the layer farthest from the central taper hole is less than or equal to 1.4 degrees, and the deflection angles of the taper holes of other layers are reduced according to the deflection inclination of 1.4 degrees according to the taper hole farthest from the central taper hole; the n large-diameter steel strands penetrate through the anchor plate and then are gathered into a compact hexagon or an unfilled corner regular hexagon; the large-diameter steel strand inhaul cable can greatly improve the construction efficiency of the steel strand inhaul cable during field installation, and effectively improve the cable force uniformity of the inhaul cable during stretching; reducing the additional bending stress, wherein m is more than or equal to 3 and less than or equal to 6, and n is more than or equal to 31 and less than or equal to 109.
Description
Technical Field
The utility model relates to a bridge inhaul cable, in particular to a steel strand inhaul cable adopting a large-diameter steel strand as a cable body and an anchor plate of a clip type group anchor structure.
Background
The stay cable is a main stressed member applied to engineering structures such as bridges, buildings and the like, and steel strands in bridge engineering are gradually developing towards large diameter and high strength to meet the requirements of bridge structures with large span and heavy load along with the structural design requirements, the development progress of material science and the continuous innovation of construction technology, so that the number of the steel strands of a cable body is reduced, and the construction and installation speed is improved.
At present, in bridge engineering, a plurality of small-sized steel strands with the strength grade of 1860MPa and the diameter of 15.2 or 15.7mm are adopted as stay cable bodies of the steel strand stay cables, and the following defects exist:
1. the construction efficiency is lower, and the dispersion of cable force homogeneity has been increased in many steel strands pretension: under the condition of the same design cable force, the small-specification steel strand is used as a cable body, so that the cable penetrating and single pre-tightening times of the steel strand are more in the installation and construction process of the inhaul cable.
2. The anchorage device has large structure size, large cable body diameter and higher product manufacturing cost.
3. The more number of the steel strands of the cable body is not beneficial to later-stage cable replacement and health monitoring.
Disclosure of Invention
The utility model aims to provide a large-diameter steel strand inhaul cable and an anchor plate of a clamping piece type group anchor structure special for the large-diameter steel strand inhaul cable, wherein the large-diameter steel strand inhaul cable can greatly improve the construction efficiency of the large-diameter steel strand inhaul cable during field installation and effectively improve the cable force uniformity of the large-diameter steel strand inhaul cable during tensioning; meanwhile, the additional bending stress is reduced, so that the stress of the steel strand is more reasonable, and the manufacturing cost of the stay cable anchorage device, the cable body and related components is reduced, thereby solving the defects in the prior art.
The technical scheme for solving the problems is as follows: the utility model provides an anchor plate of clip formula crowd anchor structure, includes anchor plate and taper hole, its characterized in that: the anchor plate taper hole has a deflection angle alpha around the central taper hole central line, the taper hole deflection angle alpha m of the layer farthest from the central taper hole is less than or equal to 1.4 degrees, other taper hole deflection angles are deflected and reduced according to the taper hole degree of 1.4 degrees farthest from the central taper hole, and the value range of m is as follows: m is not less than 3 and not more than 6.
Another related technical scheme is as follows: the utility model provides a major diameter steel strand wires cable, includes stretch-draw end ground tackle, vibration damper, PE union coupling device, steel strand wires, the outer protective casing of HDPE, buckler, stiff end ground tackle, its characterized in that: the large-diameter steel strand inhaul cable body is formed by assembling n large-diameter steel strands with the diameter being more than or equal to 21.6mm, the anchor plates of the tension-end anchorage and the fixed-end anchorage are the anchor plates of the clamping piece type group anchor structure, the taper holes of the anchor plates have deflection angles alpha m around the central line of the central taper hole, the deflection angle alpha m of the taper hole at the layer farthest from the central taper hole is less than or equal to 1.4 degrees, and the deflection angles of the taper holes at other layers are reduced according to the deflection angle of 1.4 degrees of the taper hole farthest from the central taper hole; the n large-diameter steel strands penetrate through the anchor plate and then are gathered into a compact hexagon or an unfilled corner regular hexagon; the value ranges of m and n are as follows: m is 3 or more and 6 or less, and n is 31 or more and 109 or less.
The further technical scheme of the large-diameter steel strand inhaul cable is as follows: the cable body of the large-diameter steel strand inhaul cable is a 4-layer cable body formed by assembling 31 large-diameter steel strands with the diameter equal to 21.6mm, the taper hole of the anchor plate has a deflection angle around the central line of the central taper hole, the deflection angle alpha 3 of the taper hole on the 3 rd layer farthest from the central taper hole is smaller than or equal to 1.4 degrees, the deflection angle alpha 2 of the taper hole on the 2 nd layer from the central taper hole is smaller than or equal to 1.3 degrees, and the deflection angle alpha 1 of the taper hole on the 1 st layer from the central taper hole is smaller than or equal to 1.2 degrees.
Further: the large-diameter steel strand of the large-diameter steel strand inhaul cable body is a plain surface, galvanized or epoxy steel strand with the strength grade of more than or equal to 1860MPa and the diameter of more than or equal to 21.6 mm.
By adopting the technical scheme, the anchor plate and the large-diameter steel strand inhaul cable of the clamping piece type group anchor structure have the following characteristics and beneficial effects:
1. the efficiency of construction when having promoted the on-the-spot installation of steel strand wires cable greatly has effectively improved the cable force homogeneity when cable stretch-draw:
compared with the existing steel strand inhaul cable with strength grade of 1860MPa and diameter of 15.2mm or 15.7mm, under the condition of the same design cable force, the large-diameter steel strand inhaul cable of the utility model adopts a plurality of large-diameter steel strands as a cable body, so that the number of the steel strands can be obviously reduced, as shown in figures 3-1 and 3-2, under the condition of the same design cable force, the number of the steel strands can be reduced by half compared with the steel strands with the diameter of 15.2mm or 15.7mm by adopting the steel strands with the same strength grade and diameter of 21.6mm, thereby reducing the times of cable penetration and single pre-tightening and improving the construction efficiency; the stretching times of the equal stretching method are reduced, and the uniformity of the stay cable body is improved.
2. The anchor plate of the clamping piece type group anchor structure is specially suitable for a tensioning end anchorage and a fixed end anchorage of a large-diameter steel strand inhaul cable, and the structure of an anchoring area of the inhaul cable is improved by designing the angle deviation of a conical hole of the anchor plate, namely the conical hole of the anchor plate has a deviation angle alpha (see figure 2) around the central conical hole central line, so that the break angle of a transition section of the steel strand is reduced, the additional bending stress at the steel strand outlet of the small end of the anchor plate is reduced, and the fatigue resistance of an inhaul cable system is improved.
3. Raw materials are saved, and the service life of the stay cable is prolonged; the real-time monitoring in the cable replacement construction and operation process of the inhaul cable at the later stage is facilitated, the manufacturing and construction cost of the inhaul cable is greatly reduced, and the economic benefit is improved;
the anchor device of the large-diameter steel strand inhaul cable is reduced in structural size, raw materials are saved, cost is reduced, and economic benefits are improved; the cross section area of the cable body of the inhaul cable is reduced (see the pictures of 3-1-3-2, the cross section diameter of the inhaul cable consisting of 61 small-diameter steel strands with the diameter of 15.2mm is 163.8mm, and the cross section diameter of the inhaul cable of a large-diameter steel strand consisting of 31 steel strands with the diameter of 21.6mm is 154.8 mm), the wind resistance coefficient is reduced, the inhaul cable is beneficial to inhibiting the vibration of the inhaul cable, and the service life of the inhaul cable is prolonged; meanwhile, the reduction of the number of the steel strands facilitates real-time monitoring in later-stage cable replacement construction and operation processes.
The technical features of the anchor plate and the large-diameter steel strand inhaul cable of the clip type group anchor structure according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of a large-diameter steel strand stay cable according to the present invention;
FIG. 2 is a schematic view of the structure of an anchor plate of a clip type group anchor structure according to the present invention;
3-1-3-2 are cross-sectional views of inhaul cable bodies composed of steel strands with different diameters under the same cable force:
FIG. 3-1: a schematic cross-sectional view of a stay cable body composed of 61 steel strands with a diameter of 15.2 mm;
FIG. 3-2: a schematic cross-sectional view of a large-diameter steel strand inhaul cable body composed of 31 large-diameter steel strands with the diameter of 21.6 mm;
FIG. 4: the cable body of the large-diameter steel strand cable of the present invention is tightly gathered.
In the figure:
1-stretching end anchorage, 2-vibration damping device I, 3-PE pipe connecting device, 4-HDPE outer protective sleeve, 5-waterproof cover, 6-vibration damping device II, 7-fixed end anchorage, 8-large diameter steel strand, 9-main beam and 10-tower;
alpha 1-the inclined angle of the taper hole at the layer 1 from the central taper hole central line, alpha 2-the inclined angle of the taper hole at the layer 2 from the central taper hole central line, and alpha 3-the inclined angle of the taper hole at the layer 3 from the central taper hole central line;
phi 1-the cross-sectional diameter of a guy cable consisting of 61 small-diameter steel strands with a diameter of 15.2 mm;
phi 2-the cross-sectional diameter of a large-diameter steel strand guy consisting of 31 steel strands with a diameter of 21.6 mm.
Detailed Description
The first embodiment is as follows:
an anchor plate of a clip type group anchor structure,
as shown in fig. 2, the anchor plate of the clip type group anchor structure includes an anchor plate and a taper hole, the taper hole of the anchor plate has a deflection angle α around the central line of the central taper hole, the deflection angle α m of the taper hole at the layer farthest from the central taper hole is less than or equal to 1.4 °, the deflection angles of other taper holes are reduced according to the deflection degree of the taper hole farthest from the central taper hole by 1.4 °, and the value range of m is: m is not less than 3 and not more than 6.
Fig. 2 shows a clip type anchor plate for a large-diameter steel strand inhaul cable composed of 31 steel strands with the diameter of 21.6mm, wherein the taper hole deflection angle alpha 3 of the 3 rd layer farthest from the central line of the central taper hole is less than or equal to 1.4 degrees, the taper hole deflection angle alpha 2 of the 2 nd layer from the central line of the central taper hole is less than or equal to 1.3 degrees, and the taper hole deflection angle alpha 1 of the 1 st layer from the central line of the central taper hole is less than or equal to 1.2 degrees.
Example two:
a large-diameter steel strand inhaul cable:
as shown in fig. 1, the large-diameter steel strand inhaul cable comprises a tensioning end anchorage device 1, a vibration damping device i 2, a PE pipe connecting device 3, an HDPE outer protective sleeve 4, a waterproof cover 5, a vibration damping device ii 6, a fixed end anchorage device 7 and a large-diameter steel strand 8, wherein the cable body of the large-diameter steel strand inhaul cable is a cable body formed by assembling 31 large-diameter steel strands with the diameter of more than or equal to 21.6mm, the anchor plate of the tensioning end anchorage device 1 and the fixed end anchorage device 7 is the anchor plate of the clip type group anchor structure in the first embodiment, the taper holes of the anchor plate have a deflection angle α m around the center taper hole center line, the taper hole deflection angle α 3 farthest from the center taper hole layer is less than or equal to 1.4 degrees, and the deflection angles of the taper holes of other layers are reduced according to the taper hole farthest from the center taper hole according to the deflection angle of 1.4 degrees; the taper hole inclination angle α 3 of the 3 rd layer farthest from the center line of the central taper hole is 1.4 ° or less, the taper hole inclination angle α 2 of the 2 nd layer from the center line of the central taper hole is 1.3 ° or less, and the taper hole inclination angle α 1 of the 1 st layer from the center line of the central taper hole is 1.2 ° or less (see fig. 2).
After passing through the anchor plate, 31 large-diameter steel strands are gathered into a compact hexagon or an unfilled-corner regular hexagon (see fig. 3-2).
As a variation of the embodiment of the present invention, the diameter of the large-diameter steel strand 8 may be increased according to needs, and the number n of the large-diameter steel strands 8 constituting the cable body may be increased or decreased, where the value range of n is generally: n is not less than 31 and not more than 109, and can be increased as required;
the number of the conical hole layers of the anchor plate of the correspondingly adopted clip type group anchor structure is increased, the conical hole deflection angle alpha m of the layer farthest from the central conical hole is less than or equal to 1.4 degrees, other conical hole deflection angles are deflected and reduced according to the conical hole degree of 1.4 degrees farthest from the central conical hole, and the value range of m is as follows: m is not less than 3 and not more than 6. ,
the large-diameter steel strand 8 forming the large-diameter steel strand inhaul cable body is a plain surface, galvanized or epoxy steel strand with the strength grade of more than or equal to 1860MPa and the diameter of more than or equal to 21.6 mm.
In the implementation of the utility model, the vibration damping device I2, the vibration damping device II 6, the PE pipe connecting device 3, the HDPE outer protective sleeve 4 and the waterproof cover 5 of the large-diameter steel strand inhaul cable are in conventional structures, and are not described again here.
Claims (4)
1. The utility model provides an anchor plate of clip formula crowd anchor structure, includes anchor plate and taper hole, its characterized in that: the anchor plate taper hole has a deflection angle alpha around the central taper hole central line, the taper hole deflection angle alpha m of the layer farthest from the central taper hole is less than or equal to 1.4 degrees, other taper hole deflection angles are deflected and reduced according to the taper hole degree of 1.4 degrees farthest from the central taper hole, and the value range of m is as follows: m is not less than 3 and not more than 6.
2. The utility model provides a major diameter steel strand wires cable, includes stretch-draw end ground tackle (1), vibration damper, PE union coupling device (3), HDPE outer protective casing pipe (4), buckler (5), stiff end ground tackle (7) and steel strand wires, its characterized in that: the large-diameter steel strand inhaul cable body is formed by assembling n large-diameter steel strands (8) with the diameter being more than or equal to 21.6mm, the anchor plates of a tensioning end anchorage device (1) and a fixed end anchorage device (7) are the anchor plates of the clamping piece type group anchor structure as claimed in claim 1, the taper holes of the anchor plates have deflection angles alpham around the central taper hole center line, the taper hole deflection angle alpham of the layer farthest from the central taper hole is less than or equal to 1.4 degrees, and the deflection angles of the taper holes of other layers are reduced according to the taper hole farthest from the central taper hole by 1.4 degrees; the n large-diameter steel strands penetrate through the anchor plate and then are gathered into a compact hexagon or an unfilled corner regular hexagon; the value ranges of m and n are as follows: m is 3 or more and 6 or less, and n is 31 or more and 109 or less.
3. The large-diameter steel strand inhaul cable according to claim 2, wherein: the cable body of the large-diameter steel strand inhaul cable is a 4-layer cable body formed by assembling 31 large-diameter steel strands with the diameter equal to 21.6mm, the taper hole of the anchor plate has a deflection angle around the central line of the central taper hole, the deflection angle alpha 3 of the taper hole on the 3 rd layer farthest from the central taper hole is smaller than or equal to 1.4 degrees, the deflection angle alpha 2 of the taper hole on the 2 nd layer from the central taper hole is smaller than or equal to 1.3 degrees, and the deflection angle alpha 1 of the taper hole on the 1 st layer from the central taper hole is smaller than or equal to 1.2 degrees.
4. The large-diameter steel strand inhaul cable according to claim 2, wherein: the large-diameter steel strand (8) forming the large-diameter steel strand inhaul cable body is a smooth surface, galvanized or epoxy steel strand with the strength grade of more than or equal to 1860MPa and the diameter of more than or equal to 21.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121666919.6U CN216074746U (en) | 2021-07-21 | 2021-07-21 | Anchor plate of clip type group anchor structure and large-diameter steel strand inhaul cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121666919.6U CN216074746U (en) | 2021-07-21 | 2021-07-21 | Anchor plate of clip type group anchor structure and large-diameter steel strand inhaul cable |
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| Publication Number | Publication Date |
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| CN216074746U true CN216074746U (en) | 2022-03-18 |
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| CN202121666919.6U Active CN216074746U (en) | 2021-07-21 | 2021-07-21 | Anchor plate of clip type group anchor structure and large-diameter steel strand inhaul cable |
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- 2021-07-21 CN CN202121666919.6U patent/CN216074746U/en active Active
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