CN107044086B - High-anti-slip suspension bridge cable saddle and installation and construction method thereof - Google Patents
High-anti-slip suspension bridge cable saddle and installation and construction method thereof Download PDFInfo
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- CN107044086B CN107044086B CN201710125881.3A CN201710125881A CN107044086B CN 107044086 B CN107044086 B CN 107044086B CN 201710125881 A CN201710125881 A CN 201710125881A CN 107044086 B CN107044086 B CN 107044086B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a high-anti-slip suspension bridge cable saddle and an installation and construction method thereof, and belongs to the technical field of bridge structures. The suspension bridge saddle comprises a saddle and strands. The saddle consists of a base, an end plate, a side plate, a cover plate and the like. The strand is layered horizontally in the saddle, and a partition plate is arranged between each two layers. Grooves corresponding to the strands are formed on the upper side and the lower side of each layer of the partition plate, and gaps between the lower side and the upper side of the strands and the partition plate are respectively and tightly filled with soft metal strips and elastic cushion strips. A vertical lug is arranged in the middle of the inner side of the side plate and corresponds to the notch on the partition plate to prevent the longitudinal sliding of the partition plate; bolt holes are formed in two sides of the partition plate, so that nuts can be screwed down for fixation after the partition plate penetrates into the bolts. The cable strands in the suspension bridge saddle have no mutual extrusion problem, the lifting weight of the saddle is reduced, the construction operation is simple, the manufacturing cost is low, the fatigue resistance of the main cable can be improved, the anti-skid performance is reliable, and the safety of the structure is improved.
Description
Technical Field
The invention relates to a high-anti-slip suspension bridge cable saddle and an installation and construction method thereof, and belongs to the technical field of bridge structures.
Background
In the structure of the suspension bridge, the cable saddle is arranged at the top of the main tower and at the side span steering position and is used for fixing and supporting the main cable. The dynamic and static loads of the bridge deck are transferred to the cable saddle through the sling and the main cable in sequence, and then transferred to the main tower or the steering support frame through the cable saddle. Due to the functional nature of the cable saddle, no relative sliding between the cable saddle and the main cable during service is required. In the actual engineering application process, when in static load, the horizontal forces of the main cables at the two sides of the cable saddle are basically equal, and the main cables and the cable saddle basically have no relative sliding trend; when in dynamic loading, the horizontal forces of the main cables at the two sides of the cable saddle are greatly different, so that the main cables have a sliding trend in the cable saddle. If relative sliding occurs, the main cable steel wire is worn, and the safety of the bridge structure is critical.
In particular, in recent years, multi-tower suspension bridges have been developed in China, and compared with the traditional two-tower suspension bridges, the multi-tower suspension bridge has an intermediate bridge tower, and under the action of asymmetric load, the tension difference of a main cable in a saddle at the top of the tower is larger, and the main cable slides in the saddle more easily. Due to the mechanical characteristics of the 'middle tower effect' of the multi-tower suspension bridge, the checking calculation of the anti-skid safety of the main cable is a main checking calculation content in the calculation of the multi-tower suspension bridge, and particularly in a rigid tower scheme, the anti-skid safety of the main cable is difficult to control. However, if the structural system is reasonably designed and the connection form of the main cable and the saddle is improved, the anti-slip safety performance of the main cable is improved, so that the problem is solved, the upper selection range of the form of the centering tower is wider, and the advantages of the multi-tower suspension bridge can be fully exerted. Therefore, the research on the anti-slip safety of the main cable and the saddle is one of the main research contents of the multi-tower suspension bridge. The scholars at home and abroad also conduct a lot of researches on the structure of the multi-tower suspension bridge, and mainly focus on two aspects of mechanical behavior of the multi-tower suspension bridge structure and friction behavior of a main cable saddle.
In addition, in the construction process, because the strands are generally vertically separated by the cantilever partition plates in the saddle, the vertical extrusion force among the strands in each partition plate is small, and sometimes phenomena occur frequently, and each strand cannot be effectively fixed. The steel wires in the cable strand are in point contact with the vertical partition plate on the cross section, the steel wires continuously slide up and down during construction, and the anti-corrosion protection layer of the steel wires is damaged, so that the cable strand is not easy to resist corrosion.
The longitudinal relative sliding between the main cable and the saddle during the service period of the suspension bridge and the vertical relative sliding between the cable strand and the saddle during the construction period are important design and construction control contents of the suspension bridge and are also control factors for the development of the suspension bridge towards multiple towers. Therefore, there is an urgent need for a high anti-slip suspension bridge saddle and an installation and construction method thereof, so as to effectively resist the relative sliding of a main cable and the saddle during construction and service, and improve the safety of the structure.
Disclosure of Invention
The invention aims to solve the defects and problems in the prior art and provides a high-anti-slip suspension bridge cable saddle and an installation and construction method thereof.
The invention provides a high anti-slip suspension bridge saddle, which comprises a saddle and a rope strand passing through the saddle, wherein the saddle consists of a base, an end plate, a side plate, a cover plate and the like, the rope strand is horizontally layered in the saddle, a partition plate is arranged between each layer, grooves corresponding to the rope strand are formed on the upper side and the lower side of the partition plate, the area surrounded by the grooves corresponding to the partition plates on the upper layer and the lower layer is slightly larger than the cross section of the rope strand, a soft metal belt is filled in a gap of the lower part, an elastic cushion belt is filled in the gap of the upper part, vertical convex blocks are arranged on the inner side of the side plate, and the grooves corresponding to the two sides of each partition plate are formed in the inner side of the side plate; bolt holes are formed in two sides of the partition plate, so that nuts can be screwed down for fixation after the partition plate penetrates into the bolts. According to the scheme, by arranging the horizontal partition plate, the phenomenon that the extrusion force in the cable strand is sometimes absent in the construction period when the conventional vertical partition plate is adopted is avoided, and the sliding is prevented in the construction period; the soft metal is wrapped around the cable strand, so that the point contact between the cable strand and the partition plate on the cross section is avoided, and the corrosion resistance of the steel wire is improved; the soft metal wraps the steel wire, so that the sliding coefficient of the steel wire is improved, and the anti-sliding stability is improved. The elastic cushion belt provides extrusion force for the strand, and besides providing supporting force for the upper partition plate, the elastic cushion belt mainly can increase the anti-skid friction force of the strand.
The installation construction method of the cable saddle provided by the invention comprises the following construction steps:
firstly, hoisting and fixing a base, hoisting a side plate, connecting the base and the side plate through bolts, positioning accurately, and then welding;
step two, screwing each bolt into a base bolt hole, wearing a nut, screwing to the bottommost part, and tightening and fixing;
step three, longitudinally laying the cut soft metal belt in grooves on a base along a bridge, and sequentially erecting No. 1, no. 2, no. 3 and No. 4 strands;
placing an elastic cushion belt on each strand, hoisting a first separation plate, installing the first separation plate, enabling bolts to pass through the separation plate bolt holes and press the elastic cushion belt, enabling nuts installed below to enter nut reserved grooves on the lower side of the first separation plate, applying pressure above the first separation plate, and screwing the nuts;
step five, the installation of the second partition plate, the third partition plate, the fourth partition plate, the fifth partition plate, the sixth partition plate and the top pressing plate is completed in sequence as in the step three and the step four;
and step six, installing an end plate and a cover plate.
Further, the cross section of each strand of the main cable in the saddle is in a regular hexagon. This is to facilitate the assembly of a main cable with a cross-section that is nearly circular.
The grooves on the upper side and the lower side of the partition plate are semicircular. This is mainly for ease of manufacture. Zinc spraying treatment is carried out on the upper surface and the lower surface of the partition plate so as to improve the friction coefficient between the partition plates.
The cable strand is a steel strand, and the soft metal belt is made of tin. In a small-span suspension bridge, steel strands can be directly adopted as strands, so that the structural cost is reduced.
The positions of the bolt holes of the partition plate on the upper layer correspond to those of the partition plate on the lower layer, and the number of the bolt holes is not more than that of the partition plate on the lower layer.
The lower surfaces of two sides of the middle partition board are provided with anti-slip grooves, the upper surfaces of the middle partition board are provided with anti-slip convex strips, and the corresponding anti-slip grooves and the anti-slip convex strips among the partition boards are closely matched. Mainly for preventing relative lateral sliding between the separation plates.
In the first step of the installation construction method, the base and the side plates can be assembled on the factory or the construction site, and then the assembly is integrally hoisted and installed. The method can be used for reducing overhead operation, ensuring installation quality and accelerating construction progress according to transportation and on-site hoisting capacity.
Compared with the prior art, the invention has the following beneficial effects: the cable strands in the cable saddle are not extruded mutually; the abrasion of steel wires during construction is avoided; the lifting weight of the saddle is reduced, the construction operation is simple, and the manufacturing cost is low; the anti-skid stability of each strand and the whole main cable is improved; the fatigue resistance of the main cable can be improved, and the safety of the structure is improved.
Drawings
Fig. 1 is a schematic structural view of a suspension bridge saddle of the present invention.
Fig. 2 is a cross-sectional view through the screw near the longitudinal center of the saddle.
Fig. 3 is a schematic view in half section along the longitudinal bridge through the screw centerline.
Fig. 4 is a schematic view of the bump on the side plate.
Fig. 5 shows a top view of the middle section of the partition plate.
FIG. 6 is a schematic cross-sectional view of a divider plate.
Fig. 7 is a schematic view of the bottom strand after placement.
FIG. 8 is a schematic view of the underlying strands with the elastomeric tape placed thereon.
Fig. 9 is a schematic view of the bottom separator plate after installation.
The marks in the figure are as follows: 1-strand, 2-cover plate, 3-end plate, 4-bolt, 5-nut, 6-base, 7-side plate, 8-soft metal belt, 9-base bolt hole, 10-partition plate bolt hole, 11-first partition plate, 12-second partition plate, 13-third partition plate, 14-fourth partition plate, 15-fifth partition plate, 16-sixth partition plate, 17-pressing plate, 18-nut pre-groove, 19-lower groove, 20-upper groove, 21-main cable, 22-anti-slip convex strip, 23-anti-slip groove, 24-elastic cushion strip, 25-bump, 26-notch.
Detailed Description
The following is a specific embodiment of the present invention, and the technical solution of the present invention is described with reference to the accompanying drawings, but the present invention is not limited to this embodiment.
Example 1
The corresponding schematic diagrams of this embodiment are shown in fig. 1 to 9. The suspension bridge saddle of the invention comprises a saddle and a main cable 21 passing through the saddle, wherein the main cable 21 consists of a cable strand 1, and the cable strand 1 is a single steel strand. The cross section of each strand 1 of the main cable 21 in the saddle is in a regular hexagon. The saddle consists of a base 6, an end plate 3, a side plate 7, a cover plate 2 and the like. The cable strand 1 is horizontally layered in the saddle, a partition plate is arranged between each layer, and an upper groove 20 and a lower groove 19 which are corresponding to the cable strand are manufactured on the upper side and the lower side of each layer of partition plate, and are semicircular with the same radius. The area surrounded by the corresponding grooves of the upper and lower partition plates is slightly larger than the cross section of the strand 1, the lower half part of the gap is filled with a soft metal belt 8 made of tin, and the two sides of the partition plates are provided with reserved partition plate bolt holes 10, so that after the partition plates penetrate into bolts 4, nuts 5 are screwed down for fixation, and the strand 1 does not slip in the saddle. The upper and lower surfaces of each layer of partition plate are respectively provided with an anti-slip raised line 22 and an anti-slip groove 23, and the anti-slip raised line 22 respectively corresponds to the anti-slip groove 23 on the lower surface of the partition plate above and the anti-slip raised line 22 on the upper surface of the partition plate below. The inner side of the side plate is provided with a convex block 25, and the corresponding positions of the two sides of each layer of partition plate are provided with notches 26. When the bridge construction site is installed, the following construction steps are adopted:
firstly, hoisting a base 6 and a side plate 7, and connecting and welding the base and the side plate by bolts;
step two, screwing the bolt 4 into the base bolt hole 9, and fixing by using the nut 5;
step three, paving the cut soft metal belt 8 in a groove on the base 6, and erecting the No. 1, no. 2, no. 3 and No. 4 cable strands 1 in sequence;
step four, an elastic cushion 24 is placed on each strand 1. Next, the first partition plate 11 is installed, and the bolts 4 are passed through the partition plate bolt holes 10 and pressed against the elastic washer 24, at which time the nuts 5 installed below enter the nut reserving grooves 18 on the lower side of the first partition plate 11. Applying pressure above the first partition plate 11, screwing the nut 5;
step five, like step three and step four, install corresponding strand 1 and correspondent second partition plate 12, third partition plate 13, fourth partition plate 14, fifth partition plate 15, sixth partition plate 16 and top pressing plate 17 sequentially again;
and step six, installing the end plate 3 and the cover plate 2.
Claims (7)
1. The utility model provides a high anti-skidding suspension bridge cable saddle's installation construction method, relates to saddle and the strand that passes from there, the saddle comprises base, end plate, curb plate, apron etc. characterized in that: the cable strand is horizontally layered in the saddle, and a partition plate is arranged between each two layers; grooves corresponding to the strands are formed on the upper side and the lower side of the separation plate, the area surrounded by the grooves corresponding to the upper separation plate and the lower separation plate is slightly larger than the cross section of the strands, soft metal strips are stuffed in gaps of the lower part, and elastic cushion strips are stuffed in gaps of the upper part; the inner side of the side plate is provided with a vertical lug corresponding to the notches on the two sides of each partition plate; bolt holes are formed in two sides of the partition plate, so that nuts are screwed to fix after the partition plate penetrates into the bolts; the installation construction method comprises the following construction steps,
step one: firstly hoisting and fixing the base, hoisting the side plates, firstly connecting the two bolts, and welding after accurate positioning;
step two: screwing each bolt into a base bolt hole, wearing a nut, screwing to the bottommost part, and tightening and fixing;
step three: the cut soft metal belts are longitudinally paved in grooves on a base along a bridge, and the No. 1, no. 2, no. 3 and No. 4 cable strands are erected in sequence;
step four: placing an elastic cushion belt on each strand, hoisting a first separation plate, installing the first separation plate, enabling bolts to pass through the bolt holes of the separation plate and pressing the elastic cushion belt, at the moment, enabling nuts installed below to enter nut reserved grooves on the lower side of the first separation plate, applying pressure above the first separation plate, and screwing the nuts;
step five: and then, sequentially completing the installation of the second partition plate, the third partition plate, the fourth partition plate, the fifth partition plate, the sixth partition plate and the top pressing plate according to the third and fourth steps;
step six: an end plate and a cover plate are installed.
2. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: the cross section of each strand of the main cable in the saddle is in a regular hexagon shape.
3. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: grooves on the upper side and the lower side of the partition plate are semicircular, and zinc spraying treatment is carried out on the upper surface and the lower surface of the partition plate so as to improve friction coefficients among the partition plates.
4. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: the cable strand is a steel strand, and the soft metal belt is made of tin.
5. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: the positions of the bolt holes of the partition plate on the upper layer correspond to those on the lower layer, and the number of the bolt holes is less than or equal to that of the bolt holes on the lower layer.
6. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: the lower surfaces of two sides of the middle partition plate are provided with anti-slip grooves, the upper surfaces of the two sides of the middle partition plate are provided with anti-slip convex strips, and the corresponding anti-slip grooves among the partition plates are closely matched with the anti-slip convex strips.
7. The method for installing and constructing the cable saddle of the high-slip-resistance suspension bridge according to claim 1, wherein the method comprises the following steps: in a first step, the base and side panels may be assembled on site at the factory or site, and the assembly is then integrally hoisted and installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710125881.3A CN107044086B (en) | 2017-03-05 | 2017-03-05 | High-anti-slip suspension bridge cable saddle and installation and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710125881.3A CN107044086B (en) | 2017-03-05 | 2017-03-05 | High-anti-slip suspension bridge cable saddle and installation and construction method thereof |
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| CN107044086A CN107044086A (en) | 2017-08-15 |
| CN107044086B true CN107044086B (en) | 2023-06-02 |
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| CN112878201B (en) * | 2021-01-22 | 2024-05-31 | 中交二公局第二工程有限公司 | Auxiliary wire arranging mechanism |
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| JP3176865B2 (en) * | 1997-03-31 | 2001-06-18 | 株式会社エスイー | Deflector spacer and method of arranging cable in deflection unit |
| JP3829069B2 (en) * | 2001-05-09 | 2006-10-04 | 東京製綱株式会社 | Top saddle structure of bridges and top saddle construction method for bridges |
| CN2621191Y (en) * | 2003-05-12 | 2004-06-23 | 柳州欧维姆机械有限责任公司 | Low tower stayed-cable bridge chain saddle with anti-skid anchor |
| CN106120557B (en) * | 2010-03-26 | 2019-04-02 | Vsl国际股份公司 | Abutment bracket and for protecting method of the strands from corroding in abutment bracket |
| CN102535335B (en) * | 2012-03-20 | 2014-03-12 | 柳州欧维姆机械股份有限公司 | Cable-stayed bridge cable saddle with anti-sliding locking structure |
| CN102966039B (en) * | 2012-11-23 | 2015-07-29 | 四川省交通运输厅公路规划勘察设计研究院 | A kind of suspension bridge vice saddle |
| CN203420222U (en) * | 2013-07-19 | 2014-02-05 | 四川天元机械工程股份有限公司 | Anti-slipping cable saddle of suspension bridge |
| CN103850182B (en) * | 2014-02-17 | 2015-09-30 | 中交公路规划设计院有限公司 | A kind of vertical antiskid friction plate for improving welded type cable saddle antiskid safety |
| CN103835237B (en) * | 2014-03-04 | 2015-09-09 | 浙江省交通规划设计研究院 | A kind of anti-skidding cable saddle structure of suspension bridge |
| CN204125837U (en) * | 2014-06-14 | 2015-01-28 | 苏传海 | Antiskid type suspension bridge saddle |
| CN205062661U (en) * | 2015-10-28 | 2016-03-02 | 德阳天元重工股份有限公司 | Suspension bridge main rope housing for saddle |
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