CN220224939U - Steel strand stay cable - Google Patents
Steel strand stay cable Download PDFInfo
- Publication number
- CN220224939U CN220224939U CN202321263810.7U CN202321263810U CN220224939U CN 220224939 U CN220224939 U CN 220224939U CN 202321263810 U CN202321263810 U CN 202321263810U CN 220224939 U CN220224939 U CN 220224939U
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- China
- Prior art keywords
- steel strand
- stay cable
- pipe
- embedded pipe
- bundle
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 86
- 239000010959 steel Substances 0.000 title claims abstract description 86
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 6
- 239000000725 suspension Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 239000011253 protective coating Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model discloses a steel strand stay cable which comprises an embedded pipe, a steel strand bundle and an outer protective sleeve. One end of the embedded pipe is embedded in the beam, and the steel strand bundle is arranged in the embedded pipe in a penetrating way. One end of the steel strand bundle is anchored in the beam through an anchorage device, and the other end of the steel strand bundle penetrates out of the embedded pipe. The outer sheath pipe is sleeved outside the steel strand bundle, the outer sheath pipe covers the part of the steel strand bundle, which penetrates out of the embedded pipe, and a fireproof coating is arranged on the outer wall of the outer sheath pipe. Above-mentioned steel strand wires suspension cable, outer sheath's outer wall is equipped with fire prevention coating, makes steel strand wires suspension cable have the function of fire prevention. When the fire disaster happens, the steel wire stay cable can prevent fire, so that the phenomenon that the bearing capacity of the stay cable is reduced due to overhigh temperature of steel wires of the steel wires inside can be avoided.
Description
Technical Field
The utility model relates to the technical field of bridges, in particular to a steel strand stay cable.
Background
The cable-stayed bridge is also called as a diagonal bridge, and is a bridge in which main beams are directly pulled on bridge towers by using a plurality of guys, and is a structural system formed by combining a bearing tower, a tensioned cable and a bearing bent beam body, and can be regarded as a multi-span elastic support continuous beam in which guys replace buttresses, so that bending moment in the beam body can be reduced, building height is reduced, structural weight is reduced, and materials are saved. In general, cable-stayed bridges mainly consist of cable towers, main beams and stay cables.
The stay cable is used as a life line of the cable-stayed bridge, the load on the main girder is transferred to the bridge tower, and meanwhile, the deformation of the bridge tower can be restrained, so that the cable-stayed bridge plays a role in supporting the bridge tower. The stay cable generally comprises a steel strand bundle and a sleeve sleeved outside the steel strand bundle, wherein the sleeve is formed by protecting high-density polyethylene, and the high-density polyethylene can prevent the inner strand bundle from being corroded and has an ultraviolet-proof function.
However, the high-density polyethylene is combustible, the temperature resistant interval is 60-70 ℃, the melting point is 86-110 ℃, and when a fire disaster occurs, the sheath is easy to burn, so that the temperature of the steel wires of the steel strands in the cable body is too high to reduce the stress, the bearing capacity of the inhaul cable is reduced, and the operation safety of engineering structures is affected.
Disclosure of Invention
Based on the above, it is necessary to provide a steel strand stay cable aiming at the problems that the sleeve of the existing stay cable is combustible, is easy to burn when a fire disaster occurs and reduces the bearing capacity of the stay cable.
A steel strand stay cable comprising:
one end of the embedded pipe is embedded and fixed in the beam;
the steel strand wire harness is arranged in the embedded pipe in a penetrating way, one end of the steel strand wire harness is anchored in the beam through an anchor device, and the other end of the steel strand wire harness penetrates out of the embedded pipe; and
The outer protective sleeve is sleeved outside the steel strand bundle and covers the part, outside the embedded pipe, of the steel strand bundle, and a fireproof coating is arranged on the outer wall of the outer protective sleeve.
In one embodiment, the rain-proof cover comprises a big end and a small end which are opposite to each other, the big end of the rain-proof cover is sleeved on the embedded pipe, the small end of the rain-proof cover is sleeved outside the steel strand bundle, and the small end of the rain-proof cover is abutted with the end part of the outer protective sleeve.
In one embodiment, the rain-proof cover further comprises an outer protective joint, wherein the outer protective joint is sleeved on the small end of the rain-proof cover and the outer protective sleeve, and the outer protective joint covers a seam formed by the small end of the rain-proof cover and the outer protective sleeve.
In one embodiment, the outer jacket tube is high density polyethylene and the protective coating is an intumescent fire protection coating.
In one embodiment, the device further comprises a centering device, wherein the centering device is installed in the embedded pipe, and the steel strand bundle is arranged in the centering device in a penetrating mode so as to keep the steel strand bundle centered.
In one embodiment, the centering device comprises a main body, a centering disc, a pressing plate and a connecting bolt, wherein the centering disc is arranged in the main body, the pressing plate is ballasted on the centering disc, the connecting bolt is connected with the main body and the pressing plate, the steel strand wire harness penetrates through the centering disc and the main body, and the steel strand wire harness is attached to the inner wall of the centering disc.
In one embodiment, a positioning block is arranged in the embedded pipe, and the positioning block contacts with the main body to position the centering device.
In one embodiment, the thickness of the positioning block is gradually reduced along the direction away from the opening of the embedded pipe to form a wedge shape, the inner wall of the positioning block is an inclined plane, and the main body is in contact with the inclined plane of the positioning block.
Above-mentioned steel strand wires suspension cable, outer sheath's outer wall is equipped with fire prevention coating, makes steel strand wires suspension cable have the function of fire prevention. When the fire disaster happens, the steel wire stay cable can prevent fire, so that the phenomenon that the bearing capacity of the stay cable is reduced due to overhigh temperature of steel wires of the steel wires inside can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
Fig. 1 is a schematic structural view of a steel strand stay cable according to an embodiment.
Reference numerals:
10-embedded pipes, 12-positioning blocks, 20-steel strand bundles, 30-outer protective sleeves, 32-fireproof coatings, 40-anchors, 50-rain covers, 52-big head ends, 54-small head ends, 60-outer protective joints, 70-centering devices, 72-main bodies, 74-centering plates, 76-pressing plates and 78-connecting bolts.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1, a steel strand stay cable in an embodiment includes an embedded pipe 10, a steel strand bundle 20 and an outer sheath pipe 30.
One embedded end of the embedded pipe 10 is embedded and fixed in the beam. Specifically, the embedded pipe 10 can be inserted into the concrete while the beam is poured, and a part of the embedded pipe 10 is exposed out of the concrete, so that the embedded pipe 10 is embedded in the beam.
The steel strand bundle 20 is arranged in the embedded pipe 10 in a penetrating way, one end of the steel strand bundle 20 is anchored in the beam through an anchor 40, and the other end of the steel strand bundle 20 penetrates out of the embedded pipe 10. Specifically, after the steel strand 20 is threaded, the steel strand 20 can be fixed in the beam through the wire-splitting anchor 40, so that the fixation stability of the steel strand 20 is ensured.
The outer sheath pipe 30 is sleeved outside the steel strand bundle 20, the outer sheath pipe 30 covers the part of the steel strand bundle 20 penetrating out of the embedded pipe 10, and a fireproof coating 32 is arranged on the outer wall of the outer sheath pipe 30. Wherein, the outer wall of outer sheath pipe 30 is equipped with fire prevention coating 32, makes the steel strand wires stay cable have the function of fire prevention. When the fire disaster happens, the steel wire stay cable can prevent fire, so that the phenomenon that the bearing capacity of the stay cable is reduced due to overhigh temperature of steel wires of the steel wires inside can be avoided.
In one embodiment, depending on the environment in which the strand stay is used, most fires are caused by vehicle or human factors, so the area of the strand stay that is compromised by the fire is generally the near beam area, and thus the fire protection coating 32 may be disposed in this area, while other areas are not disposed with the fire protection coating 32, so that the fire protection coating 32 does not excessively increase the cost of the strand stay.
Further, based on the above embodiment, the outer sheath 30 is made of high density polyethylene, the protective coating is an intumescent fire-proof coating 32, and the fire-proof material is sprayed to form the fire-proof coating 32 outside the outer sheath 30. The outer sheath 30 is typically 5-10mm thick after the fire-resistant coating 32 is applied. The specific materials of intumescent coating 32 are well known in the art and will not be described in detail herein.
In an embodiment, the steel strand stay cable further comprises a rain cover 50, the rain cover 50 comprises a big end 52 and a small end 54 which are opposite, the big end 52 of the rain cover 50 is sleeved on the embedded pipe 10, the small end 54 of the rain cover 50 is sleeved outside the steel strand bundle 20, and the small end 54 of the rain cover 50 is abutted with the end part of the outer sheath pipe 30. The rain cover 50 can shield the space between the outer sheath pipe 30 and the embedded pipe 10, so as to prevent liquids such as rainwater from entering the embedded pipe 10 and corroding the steel strand bundle 20.
On the basis of the embodiment, the waterproof cover further comprises an outer protection joint 60, wherein the outer protection joint 60 is sleeved on the small end 54 of the waterproof cover 50 and the outer protection sleeve 30, and the outer protection joint 60 covers a seam formed by the small end 54 of the waterproof cover 50 and the outer protection sleeve 30. Since the rain cover 50 is installed with a gap between the rain cover 50 and the outer sheath tube 30, external rainwater may enter the steel strand 20 through the gap. Therefore, the outer protection joint 60 is designed, and the gap is closed by the outer protection joint 60, so that rainwater is prevented from entering.
In one embodiment, the steel strand stay cable further comprises a centering device 70, the centering device 70 is installed in the embedded pipe 10, the steel strand bundle 20 is penetrated in the centering device 70, and the centering device 70 is used for keeping the steel strand bundle 20 at a central position in the embedded pipe 10.
Further to the above embodiment, the centering device 70 includes a main body 72, a centering disc 74, a pressing plate 76, and a connecting bolt 78. The body 72 is disposed within the pre-buried pipe 10 and is located on the centerline of the pre-buried pipe 10. The main body 72 is generally cylindrical, and the centering disc 74 is provided in the main body 72, and a cavity of the main body 72 is tapered to catch the centering disc 74. The pressure plate 76 is ballasted on the centering disc 74 and the connecting bolts 78 connect the main body 72 and the pressure plate 76 to compress the centering disc 74 within the main body 72. The steel strand bundle 20 passes through the centering disc 74 and the main body 72, and the steel strand bundle 20 is attached to the inner wall of the centering disc 74, so that the steel strand is positioned at the center position in the embedded pipe 10.
In one embodiment, the centering disc 74 may be made of a flexible material such as rubber to avoid crushing the steel strand bundle 20. The positioning block 12 is arranged in the embedded pipe 10, and the positioning block 12 contacts with the main body 72 to position the centering device 70, so that the steel strand bundle 20 is positioned in the center of the embedded pipe 10.
Further, the thickness of the positioning block 12 is gradually reduced along the direction away from the opening of the embedded pipe 10 to form a wedge shape, the inner wall of the positioning block 12 is an inclined plane, and the main body 72 is in contact with the inclined plane of the positioning block 12. Wherein. The inclined plane of the positioning block 12 can realize the positioning of the position of the main body 72 on one hand, and the positioning block 12 is wedge-shaped on the other hand, so that the loose position of the centering device 70 from the embedded pipe 10 can be avoided.
The outer wall of the outer sheath pipe 30 is provided with the fireproof coating 32, so that the steel strand stay cable has a fireproof function. When the fire disaster happens, the steel wire stay cable can prevent fire, so that the phenomenon that the bearing capacity of the stay cable is reduced due to overhigh temperature of steel wires of the steel wires inside can be avoided. Meanwhile, the range of the fireproof coating 32 can be specifically arranged according to practical requirements so as to reduce the cost of the steel strand stay cable. The centering device 70 is arranged in the embedded pipe 10, so that the steel strand bundle 20 can be positioned in the center of the embedded pipe 10, and the steel strand stay rope can be well stressed.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. A steel strand stay cable, comprising:
one end of the embedded pipe is embedded and fixed in the beam;
the steel strand wire harness is arranged in the embedded pipe in a penetrating way, one end of the steel strand wire harness is anchored in the beam through an anchor device, and the other end of the steel strand wire harness penetrates out of the embedded pipe; and
The outer protective sleeve is sleeved outside the steel strand bundle and covers the part, outside the embedded pipe, of the steel strand bundle, and a fireproof coating is arranged on the outer wall of the outer protective sleeve.
2. The steel strand stay cable according to claim 1, further comprising a rain cover having opposite large and small ends, the large end of the rain cover being sleeved on the embedded pipe, the small end of the rain cover being sleeved outside the steel strand bundle, and the small end of the rain cover being in abutment with an end of the outer jacket pipe.
3. The steel strand stay cable according to claim 2, further comprising an outer sheathing joint, the outer sheathing joint being over the small end of the rain shield and the outer sheathing tube, the outer sheathing joint covering a seam formed by the small end of the rain shield and the outer sheathing tube.
4. The steel strand stay cable according to claim 1, wherein the outer sheath tube is high density polyethylene and the fire-resistant coating is an intumescent fire-resistant coating.
5. The steel strand stay cable according to claim 1, further comprising a centering device mounted within the pre-buried pipe, the steel strand bundle being threaded within the centering device to keep the steel strand bundle centered.
6. The strand stay cable of claim 5, wherein the centering device comprises a body, a centering disc, a pressure plate and a connecting bolt, the centering disc is disposed in the body, the pressure plate is ballasted on the centering disc, the connecting bolt connects the body and the pressure plate, the strand bundle passes through the centering disc and the body, and the strand bundle is attached to an inner wall of the centering disc.
7. The steel strand stay cable according to claim 6, wherein a positioning block is arranged in the embedded pipe, and the positioning block contacts with the main body to position the centering device.
8. The steel strand stay cable according to claim 7, wherein the positioning block is tapered in thickness in a direction away from the pre-buried pipe opening, an inner wall of the positioning block is an inclined surface, and the main body is in contact with the inclined surface of the positioning block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321263810.7U CN220224939U (en) | 2023-05-23 | 2023-05-23 | Steel strand stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321263810.7U CN220224939U (en) | 2023-05-23 | 2023-05-23 | Steel strand stay cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220224939U true CN220224939U (en) | 2023-12-22 |
Family
ID=89171342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321263810.7U Active CN220224939U (en) | 2023-05-23 | 2023-05-23 | Steel strand stay cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220224939U (en) |
-
2023
- 2023-05-23 CN CN202321263810.7U patent/CN220224939U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |