CN114182633B - Suspension bridge catwalk span-setting method - Google Patents
Suspension bridge catwalk span-setting method Download PDFInfo
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- CN114182633B CN114182633B CN202111234581.1A CN202111234581A CN114182633B CN 114182633 B CN114182633 B CN 114182633B CN 202111234581 A CN202111234581 A CN 202111234581A CN 114182633 B CN114182633 B CN 114182633B
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- catwalk
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- span
- winch
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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
Abstract
The invention discloses a suspension bridge catwalk span-setting method, which comprises connecting one ends of prefabricated two sections of catwalk with windlass at the corresponding span bridge side; respectively connecting a gantry lifting hook of the overhead gantry with the other end of the catwalk on the corresponding side bridge far away from the winch; pulling the gantry lifting hook, thereby pulling catwalks connected to the gantry lifting hook, and enabling the catwalks to respectively move towards the midspan, and connecting the floating crane with one end of the two catwalks when the two catwalks move to the vicinity of the floating crane away from one end of the corresponding side winch; a gantry lifting hook which is used for connecting two catwalks with a gantry at the top of a tower and at one end of which is connected with the corresponding side of the winch, and pulling the catwalks to be lifted; when one end of the catwalk connected with the corresponding portal frame lifting hook is lifted to a pre-anchoring position at the tower top, the end of the catwalk is connected with the pre-embedded anchoring system at the tower top. The erection method is simple and efficient, and can realize the erection of the catwalk at the highest speed.
Description
Technical Field
The invention relates to the field of suspension bridge catwalk erection. More particularly, the present invention relates to a suspension bridge catwalk span management method.
Background
In the construction of the suspension bridge, the catwalk is used as the most important temporary structure in the construction of the upper structure of the suspension bridge, and an operation platform is provided for the erection of the main cable and the hoisting of the stiffening girder. However, the existing suspension bridge catwalk construction operation procedures are numerous, and the working procedures comprise lead cable erection, catwalk single-wire reciprocating traction system formation, bearing cable erection, catwalk surface layer construction, portal system construction and the like. The construction period of catwalk erection is long, two months and more than half a year, and the construction process often requires workers to frequently operate at a height of one hundred meters and two hundred meters, so that the risk is extremely high.
Aiming at the problems of the existing suspension bridge catwalk erection technology, such as multiple working procedures, long construction period, high operation risk and the like, the development of a catwalk one-span integral frame with few working procedures, high erection speed and few overhead operation times is needed.
Disclosure of Invention
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a suspension bridge catwalk span-leveling method comprising:
step one, arranging a tower top portal and a winch on the bridge crossing sides of two sides respectively, and prefabricating two sections of catwalks on the bridge crossing sides of two sides respectively;
step two, connecting one ends of the prefabricated two sections of catwalk with corresponding winches on the bridge crossing side respectively;
step three, respectively connecting the tower top portal frame with the other end of the catwalk on the corresponding side bridge, which is far away from the winch;
step four, pulling a wire rope on a portal at the top of the tower to further pull the portal lifting hook, so that a catwalk connected with the portal lifting hook is pulled, and the catwalk moves towards the midspan respectively;
floating cranes are arranged in advance at the midspan position;
step five, when the two catwalks are far away from one end of the corresponding side winding engine and move to the vicinity of the floating crane, connecting the two catwalks by means of the floating crane lifting hook;
step six, connecting two catways to one end of a winch, respectively converting the catways into portal lifting hooks connected to portal frames on the top of the corresponding sides, and lifting the portal lifting hooks by pulling the portal lifting hooks so as to drive one end of the catways connected to the portal lifting hooks on the corresponding sides to be lifted;
step seven, when one end of the catwalk connected with the corresponding side portal lifting hook is lifted to a pre-anchoring position at the tower top, connecting the end of the catwalk with a pre-embedded anchoring system at the tower top, and canceling the connection between the floating lifting hook and the catwalk;
according to a preferred embodiment of the present invention, in the suspension bridge catwalk span management, after the seventh step, the floating crane is removed.
According to a preferred embodiment of the present invention, in the step four, the speeds of the two sections of catwalk moving toward the midspan are consistent.
According to a preferred embodiment of the invention, in the suspension bridge catwalk whole span frame, steel anchor beams are respectively arranged at two ends of the catwalk, and the two ends of the catwalk are respectively connected with a winch and a portal lifting hook through the steel anchor beams.
According to a preferred embodiment of the present invention, the suspension bridge catwalk span-setting method further comprises,
and step eight, connecting the prefabricated catwalk on two sides in advance, wherein the uniform end of the catwalk is connected with one end of the tower top pre-anchoring system, and the other end of the catwalk is connected with a winch on the corresponding side.
According to a preferred embodiment of the present invention, in the suspension bridge catwalk span management, two sections of catwalks are prefabricated on two bridge sides respectively, specifically:
paving battens on the ground of the bridge crossing sides at intervals, and performing catwalk prefabrication forming operation on the battens.
According to a preferred embodiment of the present invention, the suspension bridge catwalk span is managed, and the length of each catwalk is half of the length of the bridge midspan.
According to a preferred embodiment of the invention, in the suspension bridge catwalk span structure, the catwalk is provided with a bearing rope and a handrail rope, and the bearing rope and the handrail rope at two ends of the catwalk are fixed on a steel anchor beam.
According to a preferred embodiment of the present invention, in the step four, the step four is performed by pulling the gantry hook, thereby pulling the catwalk connected to the gantry hook, while the following operations are performed:
and starting a winch of the corresponding side span bridge to reversely pull the catwalk, wherein the reverse pulling force of the winch is smaller than the pulling force of the tower top portal frame, so that the catwalk moves towards the midspan respectively.
According to a preferred embodiment of the present invention, the suspension bridge catwalk span is designed to maintain the pulling speed within a predetermined range during the course of the catwalk being pulled.
Compared with the conventional catwalk construction method, the method has the following characteristics:
(1) The erection method is simple and efficient, and can realize the erection of the catwalk at the highest speed;
(2) The catwalk is integrally prefabricated on the ground, so that the construction quality is fully ensured, and the high-altitude workload of personnel is reduced;
(3) After the catwalk is prefabricated, the catwalk is integrally hoisted, the erection speed is high, and the construction period is saved to the greatest extent;
(4) The existing hoisting machine, floating crane and portal hoisting equipment in the construction site are fully utilized, and the occupied channel time is short.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic view of construction structures of the second and third steps in the present invention.
Fig. 2 is a schematic view of a construction structure of the fourth step in the present invention.
Fig. 3 is a schematic view of a construction structure of the fifth step in the present invention.
Fig. 4 is a schematic view of a construction structure of the sixth step in the present invention.
Fig. 5 is a schematic view of a construction structure of step seven in the present invention.
Fig. 6 is a schematic view of the construction structure of step eight in the present invention.
Fig. 7 is a schematic structural view of the connection of the steel anchor beam at one end of the catwalk with the hoist in the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
As shown in fig. 1 to 7, a preferred embodiment of the present invention provides a suspension bridge catwalk span-leveling method, comprising:
step one, arranging a tower top portal and a winch on the bridge crossing sides of two sides respectively, and prefabricating two sections of catwalks on the bridge crossing sides of two sides respectively; that is, there are 2 overhead masts including overhead masts A1 and overhead masts B2, the overhead masts are all arranged on the tower, the overhead masts A1 are erected on the tower A9, the overhead masts B2 are erected on the tower B10, catwalks corresponding to two ends of sides of the overhead masts A1 and the overhead masts B2 are catwalks A3 and catwalks B4, respectively, there are 2 winders including winders A5 and winders B6,
step two, connecting one ends of the prefabricated two sections of catwalk with corresponding winches on the bridge crossing side respectively; that is, one end of the catwalk A3 is connected with the winding engine A5, one end of the catwalk B4 is connected with the winding engine B6,
step three, respectively connecting the tower top portal frame with the other end of the catwalk on the corresponding side bridge, which is far away from the winch; that is, the gantry hook on the overhead gantry A1 is connected with the other end of the catwalk A3 far away from the winch A5; the gantry hook on the overhead gantry B2 is connected with the other end of the catwalk B4 far away from the winch B6.
Step four, pulling a wire rope on a portal at the top of the tower to further pull the portal lifting hook, so that a catwalk connected with the portal lifting hook is pulled, and the catwalk moves towards the midspan respectively; that is, catwalk A3 and catwalk B4 are caused to move toward midspan, respectively.
And floating cranes 7 are arranged in advance at the midspan position;
step five, when two catwalks far away from one end of the corresponding side windlass to be near the floating crane, connecting the floating crane lifting hook 15 with the end of the two catwalks; that is, when the catwalk A3 and the catwalk B4 are moved to the vicinity of the floating crane 7 away from the end of the corresponding side hoist, the ends of the catwalk A3 and the catwalk B4 are connected with the floating crane 15, and the floating crane 15 is provided on the floating crane 7.
Step six, connecting two catways to one end of a winch, respectively converting the catways into portal lifting hooks connected to portal frames on the top of the corresponding sides, and lifting the portal lifting hooks by pulling the portal lifting hooks so as to drive one end of the catways connected to the portal lifting hooks on the corresponding sides to be lifted;
step seven, when one end of the catwalk connected with the corresponding side gantry lifting hook is lifted to a pre-anchoring position at the tower top, namely, when one end of the catwalk A3 and the catwalk B4 connected with the corresponding side gantry lifting hook is lifted to the pre-anchoring position at the tower top, the one ends of the catwalk A3 and the catwalk B4 are respectively connected with the pre-anchoring system 8 at the tower top, the connection of the floating crane 7 with the catwalk A3 and the catwalk B4 is canceled, and the two catwalks, the catwalk A3 and the catwalk B4 are far away from one end of the corresponding side windlass to be connected; the floating crane 7 is eliminated.
In order to ensure that two sections of catwalk can realize synchronous movement and realize complete symmetrical erection in the later stage, in the fourth step, the speed of the movement of the two sections of catwalk to the midspan is consistent.
In order to facilitate the catwalk to be pulled, the steel anchor beams are fixedly connected to the two ends of the catwalk respectively, and the two ends of the catwalk are connected to the winch and the gantry lifting hook respectively through the steel anchor beams.
Furthermore, the suspension bridge catwalk span-setting method further comprises the steps of,
and step eight, connecting the prefabricated catwalk on two sides in advance, wherein the uniform end of the catwalk is connected with one end of the tower top pre-anchoring system, and the other end of the catwalk is connected with a winch on the corresponding side.
In addition, in view of the convenience of construction, the formed catwalk is preferably prefabricated on site, and two sections of catwalks are respectively prefabricated on the bridge crossing sides at two sides, specifically: the battens 14 are paved on the ground of the bridge crossing sides at intervals, catwalk prefabrication forming operation is carried out on the battens 14, and the battens are paved so as to facilitate catwalk prefabrication forming construction, and the catwalk is worn in the traction process.
Specifically, the length of each catwalk is half the length of the midspan of the bridge.
Preferably, the catwalk is provided with a bearing rope and a handrail rope, and the bearing rope and the handrail rope at two ends of the catwalk are fixed on the steel anchor beam 13. Specifically, the two ends of the catwalk A3 are respectively provided with a bearing rope 11 and a handrail rope 12,
in another embodiment, the suspension bridge catwalk span-setting method comprises the following steps:
and starting a winch of the corresponding side span bridge to reversely pull the catwalk, wherein the reverse pulling force of the winch is smaller than the pulling force of the tower top portal frame, so that the catwalk moves towards the midspan respectively. That is, the winch A5 is started to reversely pull the catwalk A3, and the reverse pulling force of the winch A5 is smaller than the pulling force of the overhead gantry A1, so that the catwalk A3 moves towards the midspan; and starting the winch B6 to reversely pull the catwalk B4, wherein the reverse pulling force of the winch B6 is smaller than the pulling force of the overhead portal B2, so that the catwalk B4 moves towards the midspan.
Therefore, in order to keep the catwalk with a certain tensile force in the pulling process, the line shape is consistent with the design construction line shape.
In another embodiment, the whole span of the suspension bridge catwalk is managed, and the pulling speed of the catwalk is kept within a preset range in the process of pulling the catwalk.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A suspension bridge catwalk span management method, comprising:
step one, arranging a tower top portal and a winch on the bridge crossing sides of two sides respectively, and prefabricating two sections of catwalks on the bridge crossing sides of two sides respectively;
step two, connecting one ends of the prefabricated two sections of catwalk with corresponding winches on the bridge crossing side respectively;
step three, respectively connecting a portal lifting hook of a portal at the top of the tower with the other end of a catwalk on a corresponding side span bridge, which is far away from the winch;
step four, pulling a wire rope on a portal at the top of the tower to further pull the portal lifting hook, so that a catwalk connected with the portal lifting hook is pulled, and the catwalk moves towards the midspan respectively; floating cranes are arranged in advance at the midspan position;
step five, when the two catwalks are far away from one end of the corresponding side winding engine and move to the vicinity of the floating crane, connecting the two catwalks by means of the floating crane lifting hook;
step six, connecting two catways to one end of a winch, respectively converting the catways into portal lifting hooks connected to portal frames on the top of the corresponding sides, and lifting the portal lifting hooks by pulling the portal lifting hooks so as to drive one end of the catways connected to the portal lifting hooks on the corresponding sides to be lifted;
and step seven, when one end of the catwalk connected with the corresponding side portal lifting hook is lifted to a pre-anchoring position at the tower top, connecting the end of the catwalk with a pre-embedded anchoring system at the tower top, and canceling the connection between the floating lifting hook and the catwalk, thereby finishing the whole span erection of the catwalk.
2. The suspension bridge catwalk span structure according to claim 1, wherein after step seven, the floating crane is eliminated.
3. The suspension bridge catwalk span structure according to claim 1, wherein in step four, the speeds of the two sections of catwalks moving toward the midspan are uniform.
4. The suspension bridge catwalk span structure according to claim 1, wherein steel anchor beams are respectively arranged at two ends of the catwalk, and the two ends of the catwalk are respectively connected with a winch and a gantry lifting hook through the steel anchor beams.
5. The suspension bridge catwalk span structure according to claim 1, further comprising,
and step eight, connecting the prefabricated catwalk on two sides in advance, wherein the uniform end of the catwalk is connected with one end of the embedded anchoring system at the tower top, and the other end of the catwalk is connected with a winch on the corresponding side.
6. The suspension bridge catwalk span management method according to claim 1, wherein two sections of catwalks are prefabricated on two bridge sides respectively, specifically:
paving battens on the ground of the bridge crossing sides at intervals, and performing catwalk prefabrication forming operation on the battens.
7. The suspension bridge catwalk span structure of claim 6, wherein the length of each catwalk is half the length of the bridge midspan.
8. The suspension bridge catwalk span structure of claim 4, wherein the catwalk is provided with a bearing rope and a handrail rope, and the bearing rope and the handrail rope at two ends of the catwalk are fixed on a steel anchor beam.
9. The suspension bridge catwalk span management according to claim 1, wherein in the fourth step, the following operations are performed while pulling the gantry hook, thereby pulling the catwalk connected to the gantry hook:
and starting a winch of the corresponding side-span bridge to reversely pull the catwalk, wherein the reverse pulling force of the winch is smaller than the pulling force of the portal frame at the top of the tower, so that the catwalk moves towards the midspan respectively.
10. The suspension bridge catwalk span structure according to claim 1, wherein the pulling speed is maintained within a predetermined range during the course of the catwalk being pulled.
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| CN202111234581.1A CN114182633B (en) | 2021-10-22 | 2021-10-22 | Suspension bridge catwalk span-setting method |
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| CN114182633B true CN114182633B (en) | 2023-04-28 |
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Citations (6)
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| JPH10292317A (en) * | 1997-02-19 | 1998-11-04 | Yokogawa Buritsuji:Kk | Installation method and device of bridge girder member |
| CN101225638A (en) * | 2007-12-20 | 2008-07-23 | 中铁大桥局股份有限公司 | Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder |
| CN102392418A (en) * | 2011-12-01 | 2012-03-28 | 中交二公局第二工程有限公司 | Span-division erection construction method of construction catwalk of multi-tower suspension bridge |
| CN102720141A (en) * | 2012-07-13 | 2012-10-10 | 广东省长大公路工程有限公司 | Construction method integrating pilot rope river-crossing and traction system |
| CN108018778A (en) * | 2017-11-14 | 2018-05-11 | 中铁大桥局集团第六工程有限公司 | The cat road rope in navigable waters does not set up trailer system and cat road rope fast erecting method |
| CN112227206A (en) * | 2020-09-07 | 2021-01-15 | 中交二航局第二工程有限公司 | Process design and construction method for ground anchor to self-anchored beam |
-
2021
- 2021-10-22 CN CN202111234581.1A patent/CN114182633B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10292317A (en) * | 1997-02-19 | 1998-11-04 | Yokogawa Buritsuji:Kk | Installation method and device of bridge girder member |
| CN101225638A (en) * | 2007-12-20 | 2008-07-23 | 中铁大桥局股份有限公司 | Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder |
| CN102392418A (en) * | 2011-12-01 | 2012-03-28 | 中交二公局第二工程有限公司 | Span-division erection construction method of construction catwalk of multi-tower suspension bridge |
| CN102720141A (en) * | 2012-07-13 | 2012-10-10 | 广东省长大公路工程有限公司 | Construction method integrating pilot rope river-crossing and traction system |
| CN108018778A (en) * | 2017-11-14 | 2018-05-11 | 中铁大桥局集团第六工程有限公司 | The cat road rope in navigable waters does not set up trailer system and cat road rope fast erecting method |
| CN112227206A (en) * | 2020-09-07 | 2021-01-15 | 中交二航局第二工程有限公司 | Process design and construction method for ground anchor to self-anchored beam |
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