CN112342928A - Method for installing cable-stayed bridge of ultrahigh main tower in mountainous area - Google Patents
Method for installing cable-stayed bridge of ultrahigh main tower in mountainous area Download PDFInfo
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- CN112342928A CN112342928A CN202011316799.7A CN202011316799A CN112342928A CN 112342928 A CN112342928 A CN 112342928A CN 202011316799 A CN202011316799 A CN 202011316799A CN 112342928 A CN112342928 A CN 112342928A
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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Abstract
The invention discloses a method for installing a cable-stayed bridge of an ultrahigh main tower in a mountainous area, which comprises the steps of arranging an auxiliary arm crane on a main tower, and sequentially hoisting and assembling pier top sections and a bridge deck crane by the auxiliary arm crane; after the wall attaching crane hoists the component on the bridge floor, the component is transported by a bridge floor beam transporting vehicle, and a transfer platform is additionally arranged at the sidewalk position of the bridge floor and used for receiving the temporary stopping point where the wall attaching crane hoists to the bridge floor steel beam by the bridge floor beam transporting vehicle; the bridge deck is transported: the bridge deck precast slab and the sidewalk integral structure are transported to the front of a bridge deck crane through the lower part of the bridge deck crane, and are erected by a bridge deck crane front beam; hoisting and erecting bridge segment components; the method comprises the steps of pouring a wet joint and tensioning a corresponding stay cable once according to each erection of 2 sections of steel structure beams, and carrying out next hoisting erection after the wet joint is maintained and the like until the full-bridge erection is completed.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a method for installing a cable-stayed bridge of an ultrahigh main tower in a mountainous area.
Background
At present, the field installation of a composite beam cable-stayed bridge is generally divided into two installation processes of integral hoisting and loose splicing, hoisting equipment generally comprises a tower crane, a wall-attached crane, a bridge deck rotary crane, a tower area truss crane and the like, for the composite beam cable-stayed bridge in a mountainous area, the terrain of the bridge position often has cliffs, deep grooves and gorges, the terrain condition cannot meet the transportation requirement of a large-tonnage integral component during integral hoisting, and the integral hoisting and erection are difficult to implement; in the loose assembly construction of the combined beam cable-stayed bridge, the main procedures of girder lifting in a tower area, bridge deck transferring, suspension assembly, hoisting and erection, stay cable tensioning, wet joint pouring and the like are generally divided; the lifting beam of the tower area is generally hoisted by adopting a wall-attached crane, a tower crane and a truss, but for the ultrahigh cable-stayed bridge, the hoisting height of the lifting beam is too large, the hoisting operation surface is single, the hoisting process consumes a large amount of time, and hoisting equipment is used very frequently; meanwhile, due to the limitation of hoisting weight, the hoisting assembly of the bridge deck crane is very complicated when a tower crane or a truss is selected for hoisting, and the construction efficiency is low; for the cable-stayed bridge with the main truss stay cable under special conditions, the requirements on the transportation of the bridge deck members and the tail rotation of the bridge deck crane are further improved under the condition of avoiding the interference with the installed stay cable. In conclusion, the traditional mountain area ultrahigh main tower cable-stayed bridge has the defects of narrow component transferring and storing site, high requirement on the performance of hoisting equipment, centralized construction operation surface, lower construction efficiency, larger weather influence and the like.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art and provides a method for installing an ultrahigh main tower cable-stayed bridge in a mountainous area.
The technical solution of the invention is as follows:
a method for installing a cable-stayed bridge of an ultrahigh main tower in a mountainous area comprises the following steps:
the method comprises the following steps: arranging an auxiliary wall crane on the main tower, and sequentially hoisting and assembling pier top sections and a bridge deck crane by the auxiliary wall crane;
wherein, the mound top segment installation:
the pier top segment component is installed by adopting a wall attachment crane to hoist and assemble a splicing platform, the wall attachment crane lifts the component from the ground to the position of a bracket beside the pier, and the component installation is carried out segment by segment;
wherein, the installation of bridge floor loop wheel machine:
the bridge deck crane hoists the upper bridge deck in a form of parts, the bridge deck crane in the back side direction of the wall attachment crane is assembled firstly, after the bridge deck crane is completed, the self traveling system of the bridge deck crane is used for moving to the position of the first section which is assembled in a suspension mode in the back side direction, and then the bridge deck crane on the same side of the wall attachment crane is assembled;
step two: lifting the beam;
after the wall attaching crane hoists the component on the bridge floor, the component is transported by a bridge floor beam transporting vehicle, and a transfer platform is additionally arranged at the sidewalk position of the bridge floor and used for receiving the temporary stopping point where the wall attaching crane hoists to the bridge floor steel beam by the bridge floor beam transporting vehicle;
step three: transferring the bridge deck;
the bridge deck precast slab and the sidewalk integral structure are transported to the front of a bridge deck crane through the lower part of the bridge deck crane, and are erected by a bridge deck crane front beam;
step four: hoisting and erecting bridge segment components;
and pouring a wet joint and tensioning a corresponding stay cable once according to every 2 sections of steel structure beams, and carrying out next-round hoisting and erection after the wet joint is maintained to be equal in strength until the full-bridge installation and erection are finished.
Preferably, the wall attachment crane is a rotary wall attachment crane, which is arranged on the tower wall of the main tower above the bridge floor, and the plane position of the rotary wall attachment crane is located on the outer side of the stay cable surface.
Preferably, the bridge floor of component is transported and is adopted the electronic fortune roof beam car from taking the storage battery, fortune roof beam car transportation longitudinal beam etc. member to bridge floor hoist afterbody, is lifted by bridge floor hoist gyration armed lever to the position and is transported to the place ahead and install and erect.
Preferably, in the fourth step, the concrete method for hoisting and erecting the bridge segment member is as follows: the bridge deck crane station is positioned on the sections where the wet joints are poured and the stay cables are installed, the next section of steel beam is hoisted and assembled, the prefabricated bridge deck is assembled after the wet joints are assembled, the stay cables are initially tensioned, and the wet joints are not constructed; the bridge floor crane moves forwards by a section, the next section of steel beam and the prefabricated bridge deck are assembled and hoisted, the stay cable is primarily tensioned, after the two sections of steel beams and the prefabricated bridge deck are installed in place, the stay cable is tensioned and adjusted and wet joint concrete is poured simultaneously, and the next round of installation is carried out after the maintenance and the like.
Preferably, one end of the sliding support is provided with a penetrating jack which is used for dragging the sliding section steel beam.
Preferably, the bridge deck cranes are provided with 2 bridge deck cranes, including a first bridge deck crane and a second bridge deck crane.
The invention has the beneficial effects that: the invention provides a novel construction method for lifting, transporting and hoisting a bridge deck, which solves the problems of insufficient construction site, complex installation of a bridge deck crane and interference of construction equipment and a stay cable under the special condition of the stay cable.
Drawings
FIG. 1 is a first schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a second schematic structural view of the preferred embodiment of the present invention;
FIG. 4 is a schematic top view of FIG. 3;
FIG. 5 is a schematic illustration of the pier top segment installation construction;
FIG. 6 is a schematic illustration of the installation of a deck crane on the back side of an attached wall crane;
FIG. 7 is a schematic view of the installation of the deck crane on the same side as the wall-attached crane;
FIG. 8 is a schematic view of a boom hoist;
FIG. 9 is a schematic view of the lateral translation of the cross beam;
FIG. 10 is a schematic illustration of longitudinal cross-beam longitudinal bridge transport beams;
FIG. 11 is a schematic view of a deck crane for transporting deck slabs across a deck;
FIG. 12 is a schematic view of a cross-slab of the pavement monolith;
FIG. 13 is a schematic view of the installation of the section steel girders and the prefabricated bridge deck;
FIG. 14 is a schematic view of wet joint and stay cable tension construction;
in the figure, 1-main tower, 2-first bridge deck crane, 3-second bridge deck crane, 4-girder transport vehicle, 5-pier side support, 6-transfer platform, 7-wall attachment crane, 8-center-penetrating jack, 9-pier top segment, 10-pier top splicing support, 11-tower column, 12-prefabricated bridge deck, 13-steel structure, 14-poured wet joint, 15-to-be-poured wet joint, 16-segment steel beam, 17-slewing crane, 18-tower crane and 19-stayed cable.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1-14, a method for installing a cable-stayed bridge of an ultrahigh main tower in a mountainous area comprises the following steps:
the method comprises the following steps: referring to fig. 1-2, a wall attachment crane 7 is arranged on a main tower 1, and an assembled pier top segment 9 and a bridge deck crane are sequentially hoisted by the wall attachment crane 7; the wall attachment crane 7 is used as a mounting device and a component lifting device for assembling pier top sections 9 and a bridge deck crane.
Wherein the pier top segment 9 is installed:
referring to fig. 3-5, the pier top segment 9 is installed by hoisting with a wall attachment crane 7 and assembling with an assembling platform, the wall attachment crane 7 lifts the components from the ground to the position of the pier-side bracket 5, and the components are installed segment by segment; because the prefabricated bridge deck 12 can be subjected to wet joint construction after all the sections of the steel structures 13 are assembled, the pier top sections 9 are pulled once by adding one section until all the pier top sections 9 are pulled to the position. Because the wet joint of the pier top section and the stay cable 19 are synchronously constructed in a tensioning mode, the wall attachment crane 7 is long in arm lever convenient for component installation, if the first pair of stay cables are tensioned, the arm lever of the wall attachment crane 7 cannot rotate to the bridge floor, and the bridge floor rotating crane installs no hoisting equipment, so that the wet joint of the pier top section is temporarily not constructed, and the stay cable 19 is tensioned and constructed after the wall attachment crane 7 hoists the bridge floor on the bridge floor crane and the bridge floor is installed.
Wherein, the installation of bridge floor loop wheel machine:
referring to fig. 6-7, the bridge deck crane hoists the upper bridge deck in the form of discrete pieces, the bridge deck crane in the back side direction of the wall attachment crane 7 is assembled first, after completion, the self traveling system of the bridge deck crane is used to move to the position of the first segment in the back side direction in a suspended manner, and then the bridge deck crane on the same side of the wall attachment crane 7 is assembled;
step two: lifting the beam;
referring to fig. 8, specifically, the coanda crane 7 is a rotary type coanda crane which is arranged on the tower wall of the main tower 1 above the bridge floor and has a plane position outside the stay cables 19, and is connected and fixed with the coanda crane 7 by using embedded parts embedded in the tower wall of the main tower 1 during construction.
After the wall-attached crane 7 hoists the component on the bridge floor, the component is transported by the beam transporting vehicle 4, in order to adapt to the installation of the bridge floor crane, the length of the boom of the wall-attached crane 7 is large, and the boom cannot be rotated to the position of the bridge floor at the inner side of the stay cable 19 after the stay cable 19 is tensioned, so that the transfer platform 6 is additionally arranged at the position of a sidewalk of the bridge floor and used for receiving the lifting beam of the wall-attached crane 7 to a temporary stop point of the bridge floor by the beam transporting vehicle 4;
step three: transferring the bridge deck;
referring to fig. 9-12, the bridge deck of the component is transported by an electric beam transporting vehicle with a storage battery, the beam transporting vehicle 4 transports the longitudinal beam rod piece to the tail part of the bridge deck crane, and the longitudinal beam rod piece is lifted and transported to the front part from the rotary arm rod of the bridge deck crane to be installed and erected; the prefabricated bridge deck 12 and the sidewalk integral structure are transported to the front of a bridge deck crane through the lower part of the bridge deck crane and erected by a bridge deck crane front beam;
when the distance between the two cable faces of the 19 stayed-cable cross bridge is smaller, and the tail turning radius of the bridge deck crane is larger, the width of the prefabricated bridge deck 12 and the whole structure of the sidewalk is too large, so that the prefabricated bridge deck 12 and the whole structure of the sidewalk can not be normally erected to the front by taking the beam from the tail through the bridge deck crane, and the prefabricated bridge deck 12 and the whole structure of the sidewalk are transported to the front of the bridge deck crane through the lower part of the bridge deck crane and erected by taking the beam in front of the bridge deck crane.
Step four: hoisting and erecting bridge segment components;
referring to fig. 13 to 14, in order to improve the efficiency of bridge deck construction, when the bridge segment members are hoisted and erected, wet joints are poured and corresponding stay cables 19 are tensioned once according to every 2 segments of the bridge segment steel beams 16, and after the wet joints are maintained to be strong, the next round of hoisting and erection is performed until the full bridge is completely installed and erected.
Step four, the concrete method for hoisting and erecting the bridge segment component comprises the following steps: the bridge deck crane station is positioned on the sections where the wet joints 14 are poured and the stay cables 14 are installed, the next section of steel beam 16 is hoisted and assembled, the prefabricated bridge deck 12 is assembled after the completion, the stay cables 19 are primarily tensioned, and the wet joints are not constructed; the bridge deck crane moves forward by a section, the next section of steel beam 16 and the prefabricated bridge deck 12 are assembled and hoisted, the stay cable 19 is primarily tensioned, after the two sections of steel beams 16 and the prefabricated bridge deck 12 are installed in place, the stay cable 19 is tensioned and adjusted and the wet joint concrete is poured simultaneously, and the next round of installation is carried out after the maintenance and the like are strong.
More specifically, the method further comprises the following step five: and a temporary transfer platform is erected between the last section and the first section of the pier top section 9 for component transfer, and a sliding support is erected on the pier top section for assembling the pier top section 9 and installing a bridge deck crane.
In this embodiment, a center-penetrating jack 8 is arranged at one end of the sliding support and is used for dragging the sliding section steel beam 16.
In this embodiment, the number of the bridge deck cranes is 2, and the bridge deck cranes include a first bridge deck crane 2 and a second bridge deck crane 3.
The embodiment provides a novel construction method for lifting, transporting and hoisting a bridge deck, and solves the problems of insufficient construction site, complex installation of a bridge deck crane and interference of construction equipment and a stay cable under special conditions of the stay cable. The construction method has the advantages of strong applicability, safety, reliability and concise process flow, can effectively adapt to the terrain conditions and the restriction of the cable-stayed bridge structure on the construction, improves the construction efficiency and the safety guarantee, and generates obvious economic benefit.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.
Claims (7)
1. A method for installing a cable-stayed bridge of an ultrahigh main tower in a mountainous area is characterized by comprising the following steps:
the method comprises the following steps: arranging an auxiliary wall crane (7) on the main tower (1), and sequentially hoisting and assembling pier top sections (9) and a bridge deck crane by the auxiliary wall crane (7);
wherein the pier top segment (9) is mounted:
the pier top segment (9) component installation is carried out by adopting a wall attachment crane (7) to hoist and assemble a splicing platform, the wall attachment crane (7) lifts the component from the ground to the position of a support (5) beside the pier, and the component installation is carried out segment by segment;
wherein, the installation of bridge floor loop wheel machine:
the bridge deck crane hoists the upper bridge deck in a form of parts, the bridge deck crane in the back side direction of the wall attaching crane (7) is assembled firstly, after the bridge deck crane is completed, the self traveling system of the bridge deck crane is used for moving to the position of the first section which is assembled in the back side direction in a suspension mode, and then the bridge deck crane on the same side of the wall attaching crane (7) is assembled;
step two: lifting the beam;
after the wall attachment crane (7) hoists the component on the bridge floor, the component is transported by the beam transporting vehicle (4), and a transfer platform (6) is additionally arranged at the sidewalk position of the bridge floor and used for receiving the temporary stopping point where the wall attachment crane (7) is hoisted to the bridge floor steel beam by the beam transporting vehicle (4);
step three: transferring the bridge deck;
the prefabricated bridge deck (12) and the sidewalk integral structure are transported to the front of a bridge deck crane through the lower part of the bridge deck crane, and are erected by a bridge deck crane front beam;
step four: hoisting and erecting bridge segment components;
and pouring wet joints once and tensioning corresponding stay cables (19) according to each erection of 2 sections of steel beams (16), and carrying out next-round hoisting erection after the wet joints are maintained to be equal in strength until the full-bridge erection is finished.
2. The method for installing the mountain ultrahigh main tower cable-stayed bridge according to claim 1, wherein the wall-attached crane (7) is a rotary wall-attached crane which is arranged on the tower wall of the main tower (1) above the bridge floor and the plane position of which is positioned outside the stay cable (19), and is connected and fixed with the wall-attached crane (7) by using an embedded part embedded in the tower wall of the main tower (1) during construction.
3. The method for installing the mountain ultrahigh main tower cable-stayed bridge according to claim 1, characterized in that an electric beam transporting vehicle with a storage battery is adopted for transporting the bridge deck of the component, the beam transporting vehicle (4) transports the longitudinal and transverse beam rod pieces to the tail part of the bridge deck crane, and the bridge deck crane rotates the rotary arm rods to the positions to lift the longitudinal and transverse beam rod pieces to the front part for installation and erection.
4. The method for installing the cable-stayed bridge of the ultrahigh main tower in the mountainous area according to claim 1, wherein in the fourth step, a concrete method for hoisting and erecting bridge section components is as follows: the bridge deck crane station is positioned on the sections where the wet joints (14) are poured and the stay cables (14) are installed, a next section of steel beam (16) is hoisted and assembled, the prefabricated bridge panel (12) is assembled after the completion, the stay cables (19) are initially tensioned, and the wet joints are not constructed; the bridge deck crane moves forward by one section, the next section of steel beam (16) and the prefabricated bridge deck slab (12) are assembled and hoisted, the stay cable (19) is primarily tensioned, after the two sections of steel beams (16) and the prefabricated bridge deck slab (12) are installed in place, the stay cable (19) is tensioned and adjusted and wet joint concrete is poured, and the next round of installation is carried out after the maintenance and the like are strong.
5. The method for installing the cable-stayed bridge of the ultrahigh main tower in the mountainous area as claimed in claim 1, further comprising the following steps of: and a temporary transfer platform is erected between the last section and the first section of the pier top section (9) for component transfer, and a sliding support is erected on the pier top section for assembling the pier top section (9) and installing a bridge deck crane.
6. The method for installing the cable-stayed bridge of the ultrahigh main tower in the mountainous area as claimed in claim 5, wherein a penetrating jack (8) is arranged at one end of the sliding support and used for dragging the sliding section steel beam (16).
7. The method for installing the mountain ultrahigh main tower cable-stayed bridge according to claim 1, wherein 2 bridge deck cranes are arranged, and comprise a first bridge deck crane (2) and a second bridge deck crane (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316799.7A CN112342928A (en) | 2020-11-20 | 2020-11-20 | Method for installing cable-stayed bridge of ultrahigh main tower in mountainous area |
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| CN202011316799.7A CN112342928A (en) | 2020-11-20 | 2020-11-20 | Method for installing cable-stayed bridge of ultrahigh main tower in mountainous area |
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Cited By (4)
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| CN113774811A (en) * | 2021-10-28 | 2021-12-10 | 江西省长大桥隧研究设计院有限公司 | Method for building upper structure of composite beam cable-stayed bridge |
| CN113818356A (en) * | 2021-10-25 | 2021-12-21 | 中交二公局第五工程有限公司 | Cable-stayed bridge tower area steel plate beam and bridge deck installation method |
| CN114427199A (en) * | 2022-02-28 | 2022-05-03 | 中建五局第三建设有限公司 | Excavation-free mechanized construction method for mountain pedestrian footpath |
| WO2024148716A1 (en) * | 2023-01-12 | 2024-07-18 | 中铁九桥工程有限公司 | Method for erecting curved steel truss cable-stayed bridge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113818356A (en) * | 2021-10-25 | 2021-12-21 | 中交二公局第五工程有限公司 | Cable-stayed bridge tower area steel plate beam and bridge deck installation method |
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| CN114427199A (en) * | 2022-02-28 | 2022-05-03 | 中建五局第三建设有限公司 | Excavation-free mechanized construction method for mountain pedestrian footpath |
| WO2024148716A1 (en) * | 2023-01-12 | 2024-07-18 | 中铁九桥工程有限公司 | Method for erecting curved steel truss cable-stayed bridge |
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