CN203475307U - Expansion compensating device of outer protective casing pipe of super-long stayed cable - Google Patents
Expansion compensating device of outer protective casing pipe of super-long stayed cable Download PDFInfo
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- CN203475307U CN203475307U CN201320467017.9U CN201320467017U CN203475307U CN 203475307 U CN203475307 U CN 203475307U CN 201320467017 U CN201320467017 U CN 201320467017U CN 203475307 U CN203475307 U CN 203475307U
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Abstract
An expansion compensating device of an outer protective casing pipe of a super-long stayed cable comprises a waterproof device, a small-dimension protective casing pipe, a large-dimension protective casing pipe and a connection device, wherein the lower end of the small-dimension protective casing pipe is fixedly connected with a beam-end embedded pipe; the upper end of the large-dimension protective casing pipe is fixedly connected with a tower-end embedded pipe; the length L1 of the small-dimension protective casing pipe accounts for 1/10-9/10 of the total length of a cable, that is, the upper end of the small-dimension protective casing pipe extends to a position higher than an optional position between 1/10 and 9/10 of the total length of the cable; the length L2 of the large-dimension protective casing pipe accounts for 9/10-1/10 of the total length of the cable, that is, the lower end of the large-dimension protective casing pipe extends correspondingly to a position lower than an optional position between 9/10 and 1/10 of the total length of the cable, the large-dimension protective casing pipe and the small-dimension protective casing pipe are overlapped and sleeved or overlapped and sleeved through an expansion pipe, and the overlapping length is greater than a thermal expansion and contraction length, generated by temperature difference change, of the large-dimension protective casing pipe and the small-dimension protective casing pipe. The expansion compensating device can effectively reduce internal stress generated by dead weight of the outer protective casing pipe.
Description
Technical field
The utility model relates to a kind of suspension cable oversheath pipe expansion compensation device, particularly super long stayed cable oversheath pipe expansion compensation device.
Background technology
Development along with 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 surpasses 400 meters, in guy of twisted steel cable system, oversheath pipe is as the most external overcoat of drag-line, to playing vital effect the application life of drag-line; Oversheath pipe box, on steel wire bundle, due to the needs of mounting process, is reserved with certain space, makes the oversheath pipe can free-extension on steel wire bundle; The coefficient of thermal expansion of high-density polyethylene material is far longer than steel strand, therefore oversheath pipe stretching device must be set when guy system designs, so that oversheath pipe can freely discharge stress when variations in temperature.
In traditional design, often stretching device is arranged on to drag-line and approaches anchoring place, adopt and to fix in wherein one end of beam-ends or tower end, the frame mode that the other end can free-extension; Yet the appearance along with overlength drag-line, existing design manifests problem gradually, and along with the growth of drag-line, the deadweight of oversheath pipe also increases thereupon: as adopted the fixing mode of beam-ends, as shown in Figure 3, make the length L 3 of small-sized protecting pipe 3 be almost the total length of whole drag-line free segment; Because the deadweight of small-sized protecting pipe 3 is larger, 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 adopt the fixing mode of tower end, as shown in Figure 4, make the length L 4 of large specification protecting pipe 4 be almost the total length of whole drag-line free segment; Because the deadweight of large specification protecting pipe 4 is larger, easily cause upper end to be subject to excessive tensile stress and tension crack phenomenon occurs.
Summary of the invention
The purpose of this utility model is to provide a kind of super long stayed cable oversheath pipe expansion compensation device; this super long stayed cable oversheath pipe expansion compensation device can effectively reduce the internal stress that oversheath pipe produces because of deadweight; solving super long stayed cable oversheath pipe lower end is subject to excessive compressive stress and occurs bending and deformation 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 addressing the above problem, the technical scheme that the utility model is taked is: a kind of super long stayed cable oversheath pipe expansion compensation device, comprise water-tight device, the small-sized protecting pipe for being connected with beam-ends, large specification protecting pipe and the linkage for being connected with tower end, 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 specification 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 specification protecting pipe upper end is fixedly connected with tower end built-in pipe by linkage, described small-sized protecting pipe length L 1 is 1/10～9/10 of drag-line overall length L, be small-sized protecting pipe upper end extend to drag-line overall length L 1/10～9/10 between optional position more than, and reserved collapsing length; Described large specification protecting pipe length L 2 is 9/10～1/10 of drag-line overall length L, large specification protecting pipe lower end correspondence extend to drag-line overall length L 9/10～1/10 between optional position following and with the overlapping socket of small-sized protecting pipe or be socketed by telescoping tube.
Its further technical scheme is: roughly the same with the small-sized protecting pipe external diameter for being connected with beam-ends for the large specification protecting pipe I internal diameter being connected with tower end, and more than small-sized protecting pipe upper end extends to drag-line middle part, and reserved collapsing length; Large specification protecting pipe lower end extends to below drag-line middle part, and with the overlapping socket of small-sized protecting pipe; Large specification protecting pipe and the overlapping socket overlap length of small-sized protecting pipe X1 are greater than the length of expanding with heat and contract with cold that large specification protecting pipe I and small-sized protecting pipe produce because of difference variation.
Its further technical scheme or: the external diameter for the large specification protecting pipe II that connects with tower end is identical with small-sized protecting pipe external diameter, in large specification protecting pipe II lower end, be welded with a telescoping tube, the overlapping socket in upper end of this telescoping tube other end and small-sized protecting pipe, the overlap length X2 of telescoping tube and the overlapping socket of small-sized protecting pipe is greater than the length of expanding with heat and contract with cold that large specification protecting pipe II and small-sized protecting pipe produce because of difference variation.
Its further technical scheme be: the pressure-bearing step that it is large specification protecting pipe upper end by large specification protecting pipe that described large specification protecting pipe upper end is fixedly connected with tower end built-in pipe is stuck in linkage, relies on tensile stress to be fixedly connected with linkage; And the mode that linkage adopts welding or flange to connect is fixedly connected with tower end built-in pipe, thereby realize large specification protecting pipe upper end, be fixedly connected with tower end built-in pipe.
Its further technical scheme or: the pressure-bearing step that it is small-sized protecting pipe lower end by small-sized protecting pipe that described small-sized protecting pipe lower end is fixedly connected with beam-ends built-in pipe is socketed on water-tight device under Gravitative Loads, and the other end of water-tight device is fixed by socket on beam-ends built-in pipe, thereby realize small-sized protecting pipe lower end, be fixedly connected with beam-ends built-in pipe.
Its again further technical scheme be: described small-sized protecting pipe, large specification protecting pipe and telescoping tube are all the sleeve pipes that adopt the different size that high density polyethylene (HDPE) or other identical material plastics make.
Its again further technical scheme be: described small-sized protecting pipe length L 1 is drag-line overall length L 4/10～6/10, small-sized protecting pipe upper end extend to drag-line overall length L 4/10～6/10 between optional position more than, and reserved collapsing length; Described large specification protecting pipe length L 2 is 6/10～4/10 of drag-line overall length L, large specification protecting pipe lower end correspondence extend to drag-line overall length L 6/10～4/10 between optional position below, and with the overlapping socket of small-sized protecting pipe or be socketed by telescoping tube.
The super long stayed cable oversheath pipe expansion compensation device of the utility model due to the oversheath that has adopted two kinds of different sizes of size the oversheath of the overlapping socket in suspension cable centre position or same size by telescoping tube the method in the overlapping socket in suspension cable centre position, solved the impact of Super Long Span Cable-stayed Bridges steel strand stay cable oversheath deadweight on construction and functional performance; Therefore, the utlity model has following advantage and effect:
1. the overlap length longer than traditional approach can be set, to meet the long space of expanding with heat and contract with cold of overlength drag-line oversheath pipe;
2. because oversheath pipe adopts the fixing mounting means in two ends, more than small-sized protecting pipe 3 upper ends extend to drag-line middle part, and reserved collapsing length, large specification protecting pipe 4 lower ends extend to below drag-line middle part, and reserved collapsing length, therefore the deadweight of oversheath pipe can be divided into top and bottom two parts and bear, can effectively reduce the impact of oversheath pipe deadweight.With respect to traditional fixing mode in one end that only adopts, can avoid oversheath pipe to occur bending and deformation because deadweight produces huge pressing stress; Or excessive tensile stress and drawing crack phenomenon occurs.
Below, in conjunction with the accompanying drawings and embodiments technical characterictic and the beneficial effect of the super long stayed cable oversheath pipe expansion compensation device of the utility model are further described.
Accompanying drawing explanation
Fig. 1～Fig. 2: structure and the scheme of installation of the utility model suspension cable oversheath pipe expansion compensation device:
Fig. 1: overlapping socket stretch mode in the middle of the fixed size oversheath pipe of two ends;
Fig. 2: the overlapping socket mode of welding telescoping tube is passed through at two ends fixedly same size oversheath pipe;
Fig. 3～Fig. 4: structure and the scheme of installation of existing suspension cable oversheath pipe expansion compensation device:
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;
The large specification protecting pipe of 4-, the pressure-bearing step of the large specification protecting pipe of 41-, 5-linkage, 6-tower end built-in pipe, 7-telescoping tube.
The specific embodiment
A kind of super long stayed cable oversheath pipe expansion compensation device, comprise water-tight device 2, the small-sized protecting pipe 3 for being connected with beam-ends, large specification protecting pipe 4 and the linkage 5 for being connected with tower end, water-tight device 2 is socketed on beam-ends built-in pipe 1, small-sized protecting pipe 3 lower ends are socketed on water-tight device 2 under Gravitative Loads by pressure-bearing step 31, thereby realize small-sized protecting pipe 3 lower ends, are fixedly connected with beam-ends built-in pipe 1;
It is that large specification protecting pipe 4 upper ends are stuck in the interior dependence tensile stress of linkage 5 by pressure-bearing step 41 and are fixedly connected with linkage that described large specification protecting pipe 4 upper ends are fixedly connected with tower end built-in pipe 6, and the mode that linkage 5 adopts welding or flange to connect is fixedly connected with tower end built-in pipe 6, thereby realizing large specification protecting pipe 4 upper ends is fixedly connected with tower end built-in pipe 6;
Described small-sized protecting pipe 3 length L 1 are 1/10～9/10 of drag-line overall length L, small-sized protecting pipe 3 upper ends extend to drag-line overall length L 1/10～9/10 between optional position more than, and reserved collapsing length; Described large specification protecting pipe 4 length L 2 are 9/10～1/10 of drag-line overall length L, large specification protecting pipe 4 lower end correspondences extend to drag-line overall length L 9/10～1/10 between optional position following and with the overlapping socket of small-sized protecting pipe 3 or be socketed by telescoping tube 7; Different socket modes according between the large specification protecting pipe 4 for connecting from tower end and small-sized protecting pipe 3 for being connected with beam-ends, have following two kinds of embodiments.
Embodiment mono-: a kind ofly adopt that two ends are fixed, the super long stayed cable oversheath pipe expansion compensation device of overlapping socket in the middle of big or small oversheath pipe.
As shown in Figure 1, this super long stayed cable oversheath pipe expansion compensation device is roughly the same with small-sized protecting pipe 3 external diameters for being connected with beam-ends for the large specification protecting pipe I 4a internal diameter being connected with tower end, more than small-sized protecting pipe 3 upper ends extend to drag-line middle part, and reserved collapsing length; Large specification protecting pipe 4 lower ends extend to below drag-line middle part, and with the overlapping socket of small-sized protecting pipe 3; The overlap length X1 of large specification protecting pipe 4 and the 3 overlapping sockets of small-sized protecting pipe is greater than the length of expanding with heat and contract with cold that large specification protecting pipe I 4a and small-sized protecting pipe 3 produce because of difference variation, and present embodiment is preferred embodiments.
Embodiment bis-: a kind of two ends are fixed, the oversheath pipe of same size passes through the super long stayed cable oversheath pipe expansion compensation device of the overlapping socket of telescoping tube.
As shown in Figure 2, in the present embodiment, this super long stayed cable oversheath pipe expansion compensation device is identical with small-sized protecting pipe 3 external diameters for the external diameter of the large specification protecting pipe II 4b with the connection of tower end, in large specification protecting pipe II 4b lower end, be welded with a telescoping tube 7, the overlapping socket in upper end of these telescoping tube 7 other ends and small-sized protecting pipe 3, the overlap length X2 of telescoping tube 7 and the 3 overlapping sockets of small-sized protecting pipe is greater than the length of expanding with heat and contract with cold that large specification protecting pipe II 4b and small-sized protecting pipe 3 produce because of difference variation.
In each embodiment of the utility model, described small-sized protecting pipe 3, large specification protecting pipe 4 and telescoping tube 7 are all the sleeve pipes that adopt the different size that high density polyethylene (HDPE) or other identical material plastics make.
Claims (7)
1. a super long stayed cable oversheath pipe expansion compensation device, comprise water-tight device (2), the small-sized protecting pipe (3) for being connected with beam-ends, large specification protecting pipe (4) and the linkage (5) for being connected with tower end, water-tight device (2) is socketed on beam-ends built-in pipe (1), it is upper that small-sized protecting pipe (3) lower end is socketed on water-tight device (2), and large specification 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 specification 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 L 1 is 1/10～9/10 of drag-line overall length L, be small-sized protecting pipe (3) upper end extend to drag-line overall length L 1/10～9/10 between optional position more than, and reserved collapsing length; Described large specification protecting pipe (4) length L 2 is 9/10～1/10 of drag-line overall length L, large specification protecting pipe (4) lower end correspondence extend to drag-line overall length L 9/10～1/10 between optional position following and with the overlapping socket of small-sized protecting pipe (3) or by telescoping tube (7) socket.
2. super long stayed cable oversheath pipe expansion compensation device according to claim 1, it is characterized in that: roughly the same with small-sized protecting pipe (3) external diameter for being connected with beam-ends for large specification protecting pipe I (4a) internal diameter being connected with tower end, more than small-sized protecting pipe (3) upper end extends to drag-line middle part, and reserved collapsing length; Large specification protecting pipe (4) lower end extends to below drag-line middle part, and with the overlapping socket of small-sized protecting pipe (3); Large specification protecting pipe (4) and the overlapping socket overlap length of small-sized protecting pipe (3) X1 are greater than the length of expanding with heat and contract with cold that large specification protecting pipe I (4a) and small-sized protecting pipe (3) produce because of difference variation.
3. super long stayed cable oversheath pipe expansion compensation device according to claim 1, it is characterized in that: the external diameter for the large specification protecting pipe II (4b) with the connection of tower end is identical with small-sized protecting pipe (3) external diameter, in large specification protecting pipe II (4b) lower end, be welded with a telescoping tube (7), the overlapping socket in upper end of this telescoping tube (7) other end and small-sized protecting pipe (3), the overlap length X2 of telescoping tube (7) and the overlapping socket of small-sized protecting pipe (3) is greater than the length of expanding with heat and contract with cold that large specification protecting pipe II (4b) and small-sized protecting pipe (3) produce because of difference variation.
4. according to the super long stayed cable oversheath pipe expansion compensation device described in claim 1,2 or 3, it is characterized in that: the pressure-bearing step (41) that it is large specification protecting pipe (4) upper end by large specification protecting pipe that described large specification protecting pipe (4) upper end is fixedly connected with tower end built-in pipe (6) is stuck in linkage (5), relies on tensile stress to be fixedly connected with linkage; And the mode that linkage (5) adopts welding or flange to connect is fixedly connected with tower end built-in pipe (6), thereby realize large specification protecting pipe (4) upper end, be fixedly connected with tower end built-in pipe (6).
5. according to the super long stayed cable oversheath pipe expansion compensation device described in claim 1,2 or 3, it is characterized in that: the pressure-bearing step (31) that it is small-sized protecting pipe (3) lower end by small-sized protecting pipe that described small-sized protecting pipe (3) lower end is fixedly connected with beam-ends built-in pipe (1) is socketed on water-tight device (2) under Gravitative Loads, and the other end of water-tight device (2) is fixed by socket in beam-ends built-in pipe (1) above, thereby realize small-sized protecting pipe (3) lower end, be fixedly connected with beam-ends built-in pipe (1).
6. according to the super long stayed cable oversheath pipe expansion compensation device described in claim 1,2 or 3, it is characterized in that: described small-sized protecting pipe (3), large specification protecting pipe (4) and telescoping tube (7) are all sleeve pipes of the different size made of employing high density polyethylene (HDPE) or other identical material plastics.
7. according to the super long stayed cable oversheath pipe expansion compensation device described in claim 1,2 or 3, it is characterized in that: described small-sized protecting pipe (3) length L 1 is drag-line overall length L 4/10～6/10, be small-sized protecting pipe (3) upper end extend to drag-line overall length L 4/10～6/10 between optional position more than, and reserved collapsing length; Described large specification protecting pipe (4) length L 2 is 6/10～4/10 of drag-line overall length L, be large specification protecting pipe (4) lower end correspondence extend to drag-line overall length L 6/10～4/10 between optional position below, and with the overlapping socket of small-sized protecting pipe (3) or by telescoping tube (7) socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467017.9U CN203475307U (en) | 2013-08-01 | 2013-08-01 | Expansion compensating device of outer protective casing pipe of super-long stayed cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467017.9U CN203475307U (en) | 2013-08-01 | 2013-08-01 | Expansion compensating device of outer protective casing pipe of super-long stayed cable |
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| Publication Number | Publication Date |
|---|---|
| CN203475307U true CN203475307U (en) | 2014-03-12 |
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| CN201320467017.9U Withdrawn - After Issue CN203475307U (en) | 2013-08-01 | 2013-08-01 | Expansion compensating device of outer protective casing pipe of super-long stayed cable |
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| CN (1) | CN203475307U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388306A (en) * | 2013-08-01 | 2013-11-13 | 柳州欧维姆机械股份有限公司 | Super-long stay cable outer protective sleeve expansion compensation device |
| CN106544950A (en) * | 2016-11-02 | 2017-03-29 | 浙江海洋大学 | The anchor structure of bowstring arch bridge |
| CN106567317A (en) * | 2016-11-02 | 2017-04-19 | 浙江海洋大学 | Reinforced type tied-arch bridge |
| CN106567318A (en) * | 2016-11-02 | 2017-04-19 | 浙江海洋大学 | Concrete tied-arch bridge |
| CN106592447A (en) * | 2016-11-02 | 2017-04-26 | 浙江海洋大学 | Reinforcement device of tied-arch bridge |
| CN106592405A (en) * | 2016-11-02 | 2017-04-26 | 浙江海洋大学 | Stable concrete tied arch bridge |
-
2013
- 2013-08-01 CN CN201320467017.9U patent/CN203475307U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388306A (en) * | 2013-08-01 | 2013-11-13 | 柳州欧维姆机械股份有限公司 | Super-long stay cable outer protective sleeve expansion compensation device |
| CN103388306B (en) * | 2013-08-01 | 2015-07-29 | 柳州欧维姆机械股份有限公司 | Super-long stay cable outer protective sleeve expansion compensation device |
| CN106544950A (en) * | 2016-11-02 | 2017-03-29 | 浙江海洋大学 | The anchor structure of bowstring arch bridge |
| CN106567317A (en) * | 2016-11-02 | 2017-04-19 | 浙江海洋大学 | Reinforced type tied-arch bridge |
| CN106567318A (en) * | 2016-11-02 | 2017-04-19 | 浙江海洋大学 | Concrete tied-arch bridge |
| CN106592447A (en) * | 2016-11-02 | 2017-04-26 | 浙江海洋大学 | Reinforcement device of tied-arch bridge |
| CN106592405A (en) * | 2016-11-02 | 2017-04-26 | 浙江海洋大学 | Stable concrete tied arch bridge |
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