CN103388306B - Super-long stay cable outer protective sleeve expansion compensation device - Google Patents
Super-long stay cable outer protective sleeve expansion compensation device Download PDFInfo
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- CN103388306B CN103388306B CN201310331496.6A CN201310331496A CN103388306B CN 103388306 B CN103388306 B CN 103388306B CN 201310331496 A CN201310331496 A CN 201310331496A CN 103388306 B CN103388306 B CN 103388306B
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Abstract
A kind of super-long stay cable outer protective sleeve expansion compensation device, comprise water-tight device, small-sized protecting pipe, large gauge protecting pipe and linkage, small-sized protecting pipe lower end is fixedly connected with beam-ends built-in pipe, large gauge protecting pipe upper end is fixedly connected with tower end built-in pipe, described small-sized protecting pipe length L1 is 1/10 ~ 9/10 of drag-line overall length L, namely small-sized protecting pipe upper end extend to drag-line overall length 1/10 ~ 9/10 between optional position more than, described large gauge protecting pipe length L2 is 9/10 ~ 1/10 of drag-line overall length L, namely large gauge protecting pipe lower end correspondence extend to drag-line overall length 9/10 ~ 1/10 between optional position below, and overlapping with small-sized protecting pipe be socketed or by telescoping tube overlap be socketed, overlap length is greater than the length of expanding with heat and contract with cold that large gauge protecting pipe and small-sized protecting pipe produce because of difference variation.This expansion compensation device effectively can reduce the internal stress that outer sheath tube produces because of deadweight.
Description
Technical field
The present invention relates to a kind of suspension cable outer sheath tube expansion compensation device, particularly super-long stay cable outer protective sleeve expansion compensation device.
Background technology
Along with the development of technology for cable-stayed bridges, cable stayed bridge increasing across footpath, nowadays Cable-Stayed Bridge with Ultra-Long Spans guy of twisted steel cable length is more than 400 meters, in guy of twisted steel cable system, outer sheath tube, as the most external overcoat of drag-line, plays vital effect to the application life of drag-line; Outer sheath tube is placed on steel wire bundle, due to the needs of mounting process, is reserved with certain space, makes outer sheath tube can free-extension on steel wire bundle; The coefficient of thermal expansion of high-density polyethylene material is far longer than steel strand, therefore must arrange outer sheath tube stretching device when guy system designs, so that outer sheath tube freely can discharge stress when variations in temperature.
Often stretching device is arranged on drag-line close to anchoring place in traditional design, adopts and fix in wherein one end of beam-ends or tower end, the other end then can the frame mode of free-extension; But along with the appearance of overlength drag-line, existing design manifests problem gradually, and along with the growth of drag-line, the deadweight of outer sheath tube also increases thereupon; As the mode adopting beam-ends fixing, as shown in Figure 3, the length L3 of small-sized protecting pipe 3 is made to be almost the total length of whole drag-line free segment; Because the deadweight of small-sized protecting pipe 3 is comparatively large, due to the resistance to compression of high-density polyethylene material own and tensile strength lower, such structure easily causes lower end to be subject to excessive compressive stress and the phenomenon that occurs bending and deformation; As the mode adopting tower end fixing, as shown in Figure 4, the length L4 of large gauge protecting pipe 4 is made to be almost the total length of whole drag-line free segment; Because the deadweight of large gauge protecting pipe 4 is comparatively large, upper end is easily caused to be subject to excessive tensile stress and tension crack phenomenon occurs.
Summary of the invention
The object of the present invention is to provide a kind of super-long stay cable outer protective sleeve expansion compensation device; this super-long stay cable outer protective sleeve expansion compensation device effectively can reduce the internal stress that outer sheath tube produces because of deadweight; solution super long stayed cable outer sheath tube lower end occurs bending and deformation by excessive compressive stress or upper end is subject to excessive tensile stress and the phenomenon of tension crack occurs; to improve the anti-corrosion protection performance of overlength drag-line, extend the application life of drag-line.
For solving the problem, the technical scheme that the present invention takes is: a kind of super-long stay cable outer protective sleeve expansion compensation device, comprise water-tight device, for be connected with beam-ends small-sized protecting pipe, for the large gauge protecting pipe that is connected with tower end and linkage, water-tight device is socketed on beam-ends built-in pipe, small-sized protecting pipe lower end is socketed on water-tight device, and large gauge protecting pipe upper end is connected with linkage; It is characterized in that: described small-sized protecting pipe lower end is fixedly connected with beam-ends built-in pipe by water-tight device, large gauge protecting pipe upper end is fixedly connected with tower end built-in pipe by linkage, described small-sized protecting pipe length L1 is 1/10 ~ 9/10 of drag-line overall length L, namely small-sized protecting pipe upper end extend to drag-line overall length L 1/10 ~ 9/10 between optional position, and reserved collapsing length; Described large gauge protecting pipe length L2 is 9/10 ~ 1/10 of drag-line overall length L, namely large gauge protecting pipe lower end correspondence extend to drag-line overall length L 9/10 ~ 1/10 between optional position and overlappingly with small-sized protecting pipe be socketed or be socketed by telescoping tube.
Its further technical scheme is: for roughly the same with the small-sized protecting pipe external diameter for being connected with beam-ends with large gauge protecting pipe I internal diameter that tower end connects, small-sized protecting pipe upper end extends to more than in the middle part of drag-line, and reserved collapsing length; Large gauge protecting pipe lower end extends to below in the middle part of drag-line, and overlappingly with small-sized protecting pipe is socketed; Large gauge protecting pipe is overlapping with small-sized protecting pipe to be socketed overlap length X1 and to be greater than the length of expanding with heat and contract with cold that large gauge protecting pipe I and small-sized protecting pipe produce because of difference variation.
Its further technical scheme or: for identical with small-sized protecting pipe external diameter with the external diameter of the large gauge protecting pipe II that tower end connects, a telescoping tube is welded with in large gauge protecting pipe II lower end, this telescoping tube other end is overlapping with the upper end of small-sized protecting pipe to be socketed, and the telescoping tube overlap length X2 that be socketed overlapping with small-sized protecting pipe is greater than the length of expanding with heat and contract with cold that large gauge protecting pipe II and small-sized protecting pipe produce because of difference variation.
Its further technical scheme be: it is that large gauge protecting pipe upper end is stuck in linkage by the pressure-bearing step of large gauge protecting pipe that described large gauge protecting pipe upper end is fixedly connected with tower end built-in pipe, rely on tensile stress be fixedly connected with linkage; And linkage adopts welding or the mode of Flange joint to be fixedly connected with tower end built-in pipe, thus realize large gauge protecting pipe upper end and be fixedly connected with tower end built-in pipe.
Its further technical scheme or: it is that small-sized protecting pipe lower end is socketed on water-tight device by the pressure-bearing step of small-sized protecting pipe under Gravitative Loads that described small-sized protecting pipe lower end is fixedly connected with beam-ends built-in pipe, and the other end of water-tight device is fixed by socket on beam-ends built-in pipe, thus realizes small-sized protecting pipe lower end and be fixedly connected with beam-ends built-in pipe.
Its again further technical scheme be: described small-sized protecting pipe, large gauge protecting pipe and telescoping tube are all the sleeve pipes of the different size adopting high density polyethylene (HDPE) or other identical material plastics to make.
Its again further technical scheme be: described small-sized protecting pipe length L1 is 4/10 ~ 6/10 of drag-line overall length L, namely small-sized protecting pipe upper end extend to drag-line overall length L 4/10 ~ 6/10 between optional position, and reserved collapsing length; Described large gauge protecting pipe length L2 is 6/10 ~ 4/10 of drag-line overall length L, namely large gauge protecting pipe lower end correspondence extend to drag-line overall length L 6/10 ~ 4/10 between optional position, and overlappingly with small-sized protecting pipe be socketed or be socketed by telescoping tube.
The super-long stay cable outer protective sleeve expansion compensation device of the present invention due to the oversheath that have employed size two kinds of different sizes at the oversheath of the overlap socket of suspension cable centre position or same size by the method for telescoping tube in the overlap socket of suspension cable centre position, solve the impact of Super Long Span Cable-stayed Bridges steel strand stay cable oversheath deadweight on construction and functional performance; Therefore, the present invention has the following advantages and effect:
1. the overlap length longer than traditional approach can be set, to meet the longer space of expanding with heat and contract with cold of overlength drag-line outer sheath tube;
2. due to mounting means that outer sheath tube adopts two ends fixing, small-sized protecting pipe 3 upper end extends to more than in the middle part of drag-line, and reserved collapsing length, large gauge protecting pipe 4 lower end extends to below in the middle part of drag-line, and reserved collapsing length, therefore the deadweight of outer sheath tube can be divided into top and bottom two parts to bear, the impact of outer sheath tube deadweight can be effectively reduced.Relative to traditional mode only adopting one end fixing, outer sheath tube can be avoided to occur bending and deformation because deadweight produced huge pressing stress; Or excessive tensile stress and drawing crack phenomenon occurs.
Below, in conjunction with the accompanying drawings and embodiments the technical characteristic of the super-long stay cable outer protective sleeve expansion compensation device of the present invention and beneficial effect are further described.
Accompanying drawing explanation
Fig. 1 ~ Fig. 2: the structure of suspension cable outer sheath tube expansion compensation device of the present invention and scheme of installation:
Fig. 1: overlapping socket stretch mode in the middle of the fixed size outer sheath tube of two ends;
Fig. 2: two ends Stationary liquid same specification outer sheath tube is by the overlapping socket mode of welding telescoping tube;
Fig. 3 ~ Fig. 4: the structure of existing suspension cable outer sheath tube expansion compensation device and scheme of installation:
Fig. 3: adopt beam-ends fixed form;
Fig. 4: adopt tower end fixed form.
In figure:
1-beam-ends built-in pipe, 2-water-tight device, 3-small-sized protecting pipe, the pressure-bearing step of 31-small-sized protecting pipe;
4-large gauge protecting pipe, the pressure-bearing step of 41-large gauge protecting pipe, 5-linkage, 6-tower end built-in pipe, 7-telescoping tube.
Detailed description of the invention
A kind of super-long stay cable outer protective sleeve expansion compensation device, comprise water-tight device 2, for be connected with beam-ends small-sized protecting pipe 3, for the large gauge protecting pipe 4 that is connected with tower end and linkage 5, water-tight device 2 is socketed on beam-ends built-in pipe 1, small-sized protecting pipe 3 lower end is socketed on water-tight device 2 under Gravitative Loads by pressure-bearing step 31, thus realizes small-sized protecting pipe 3 lower end and be fixedly connected with beam-ends built-in pipe 1;
Described large gauge protecting pipe 4 upper end is fixedly connected with tower end built-in pipe 6, and to be large gauge protecting pipe 4 upper end by pressure-bearing step 41 be stuck in linkage 5 relies on tensile stress to be fixedly connected with linkage, and linkage 5 adopts welding or the mode of Flange joint to be fixedly connected with tower end built-in pipe 6, thus realize large gauge protecting pipe 4 upper end with tower end built-in pipe 6 and be fixedly connected with;
Described small-sized protecting pipe 3 length L1 is 1/10 ~ 9/10 of drag-line overall length L, namely small-sized protecting pipe 3 upper end extend to drag-line overall length L 1/10 ~ 9/10 between optional position, and reserved collapsing length; Described large gauge protecting pipe 4 length L2 is 9/10 ~ 1/10 of drag-line overall length L, namely large gauge protecting pipe 4 lower end correspondence extend to drag-line overall length L 9/10 ~ 1/10 between optional position and overlappingly with small-sized protecting pipe 3 be socketed or be socketed by telescoping tube 7; According to for from the different socket modes between the large gauge protecting pipe 4 that tower end connects with the small-sized protecting pipe 3 for being connected with beam-ends, have following two kinds of embodiments.
Embodiment one: a kind ofly adopt two ends to fix, the super-long stay cable outer protective sleeve expansion compensation device of overlapping socket in the middle of size outer sheath tube.
As shown in Figure 1, this super-long stay cable outer protective sleeve expansion compensation device is used for roughly the same with small-sized protecting pipe 3 external diameter for being connected with beam-ends with the large gauge protecting pipe I 4a internal diameter that tower end connects, small-sized protecting pipe 3 upper end extends to more than in the middle part of drag-line, and reserved collapsing length; Large gauge protecting pipe 4 lower end extends to below in the middle part of drag-line, and overlappingly with small-sized protecting pipe 3 is socketed; The large gauge protecting pipe 4 overlap length X1 that be socketed overlapping with small-sized protecting pipe 3 is greater than the length of expanding with heat and contract with cold that large gauge protecting pipe I 4a and small-sized protecting pipe 3 produce because of difference variation, and present embodiment is better embodiment.
Embodiment two: the super-long stay cable outer protective sleeve expansion compensation device that a kind of two ends are fixed, the outer sheath tube of same size is socketed by telescoping tube overlap.
As shown in Figure 2, in the present embodiment, this super-long stay cable outer protective sleeve expansion compensation device is used for identical with small-sized protecting pipe 3 external diameter with the external diameter of large gauge protecting pipe II 4b that tower end connects, a telescoping tube 7 is welded with in large gauge protecting pipe II 4b lower end, telescoping tube 7 other end is overlapping with the upper end of small-sized protecting pipe 3 is socketed for this, and the telescoping tube 7 overlap length X2 that be socketed overlapping with small-sized protecting pipe 3 is greater than the length of expanding with heat and contract with cold that large gauge protecting pipe II 4b and small-sized protecting pipe 3 produce because of difference variation.
In various embodiments of the present invention, described small-sized protecting pipe 3, large gauge protecting pipe 4 and telescoping tube 7 are all the sleeve pipes of the different size adopting high density polyethylene (HDPE) or other identical material plastics to make.
Claims (7)
1. a super-long stay cable outer protective sleeve expansion compensation device, comprise water-tight device (2), for be connected with beam-ends small-sized protecting pipe (3), for the large gauge protecting pipe (4) that is connected with tower end and linkage (5), water-tight device (2) is socketed on beam-ends built-in pipe (1), small-sized protecting pipe (3) lower end is socketed on water-tight device (2), and large gauge protecting pipe (4) upper end is connected with linkage (5); It is characterized in that: described small-sized protecting pipe (3) lower end is fixedly connected with beam-ends built-in pipe (1) by water-tight device (2), large gauge protecting pipe (4) upper end is fixedly connected with tower end built-in pipe (6) by linkage (5), described small-sized protecting pipe (3) length L1 is 1/10 ~ 9/10 of drag-line overall length L, namely small-sized protecting pipe (3) upper end extend to drag-line overall length L 1/10 ~ 9/10 between optional position, and reserved collapsing length; Described large gauge protecting pipe (4) length L2 is 9/10 ~ 1/10 of drag-line overall length L, namely large gauge protecting pipe (4) lower end correspondence extend to drag-line overall length L 9/10 ~ 1/10 between optional position and overlapping with small-sized protecting pipe (3) be socketed or pass through telescoping tube (7) be socketed.
2. super-long stay cable outer protective sleeve expansion compensation device according to claim 1, it is characterized in that: for roughly the same with small-sized protecting pipe (3) external diameter for being connected with beam-ends with large gauge protecting pipe I (4a) internal diameter that tower end connects, small-sized protecting pipe (3) upper end extends to more than in the middle part of drag-line, and reserved collapsing length; Large gauge protecting pipe (4) lower end extends to below in the middle part of drag-line, and overlappingly with small-sized protecting pipe (3) is socketed; Large gauge protecting pipe (4) is overlapping with small-sized protecting pipe (3) to be socketed overlap length X1 and to be greater than the length of expanding with heat and contract with cold that large gauge protecting pipe I (4a) and small-sized protecting pipe (3) produce because of difference variation.
3. super-long stay cable outer protective sleeve expansion compensation device according to claim 1, it is characterized in that: for identical with small-sized protecting pipe (3) external diameter with the external diameter of the large gauge protecting pipe II (4b) that tower end connects, a telescoping tube (7) is welded with in large gauge protecting pipe II 4b lower end, this telescoping tube (7) other end is overlapping with the upper end of small-sized protecting pipe (3) to be socketed, telescoping tube (7) the overlap length X2 that be socketed overlapping with small-sized protecting pipe (3) is greater than the length of expanding with heat and contract with cold that large gauge protecting pipe II (4b) and small-sized protecting pipe (3) produce because of difference variation.
4. the super-long stay cable outer protective sleeve expansion compensation device according to claim 1,2 or 3, it is characterized in that: it is that large gauge protecting pipe (4) upper end is stuck in linkage (5) by the pressure-bearing step (41) of large gauge protecting pipe that described large gauge protecting pipe (4) upper end is fixedly connected with tower end built-in pipe (6), relies on tensile stress to be fixedly connected with linkage; And linkage (5) adopts welding or the mode of Flange joint to be fixedly connected with tower end built-in pipe (6), thus realize large gauge protecting pipe (4) upper end and be fixedly connected with tower end built-in pipe (6).
5. the super-long stay cable outer protective sleeve expansion compensation device according to claim 1,2 or 3, it is characterized in that: it is that small-sized protecting pipe (3) lower end is socketed on water-tight device (2) by the pressure-bearing step (31) of small-sized protecting pipe under Gravitative Loads that described small-sized protecting pipe (3) lower end is fixedly connected with beam-ends built-in pipe (1), and the other end of water-tight device (2) is fixed by socket on beam-ends built-in pipe (1), thus realizes small-sized protecting pipe (3) lower end and be fixedly connected with beam-ends built-in pipe (1).
6. the super-long stay cable outer protective sleeve expansion compensation device according to claim 1,2 or 3, is characterized in that: described small-sized protecting pipe (3), large gauge protecting pipe (4) and telescoping tube (7) are all the sleeve pipes of the different size adopting high density polyethylene (HDPE) or other identical material plastics to make.
7. the super-long stay cable outer protective sleeve expansion compensation device according to claim 1,2 or 3, it is characterized in that: described small-sized protecting pipe (3) length L1 is 4/10 ~ 6/10 of drag-line overall length L, namely small-sized protecting pipe (3) upper end extend to drag-line overall length L 4/10 ~ 6/10 between optional position, and reserved collapsing length; Described large gauge protecting pipe (4) length L2 is 6/10 ~ 4/10 of drag-line overall length L, namely large gauge protecting pipe (4) lower end correspondence extend to drag-line overall length L 6/10 ~ 4/10 between optional position, and overlapping with small-sized protecting pipe (3) be socketed or pass through telescoping tube (7) be socketed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310331496.6A CN103388306B (en) | 2013-08-01 | 2013-08-01 | Super-long stay cable outer protective sleeve expansion compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310331496.6A CN103388306B (en) | 2013-08-01 | 2013-08-01 | Super-long stay cable outer protective sleeve expansion compensation device |
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| CN103388306A CN103388306A (en) | 2013-11-13 |
| CN103388306B true CN103388306B (en) | 2015-07-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894107A (en) * | 2018-06-22 | 2018-11-27 | 深圳市科兰德实业发展有限公司 | Steel strand stay cable |
| CN112523085B (en) * | 2020-12-01 | 2022-08-16 | 柳州欧维姆机械股份有限公司 | Inhaul cable protecting sleeve with functional elements and construction method thereof |
| CN113668409B (en) * | 2021-08-24 | 2023-02-21 | 福建九鼎建设集团有限公司 | External prestressed tendon fire-proof heat-insulation device |
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