CN114775432B - Splicing bracket of large-tonnage steel-concrete combined beam of cable-stayed bridge cable tower - Google Patents
Splicing bracket of large-tonnage steel-concrete combined beam of cable-stayed bridge cable tower Download PDFInfo
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- CN114775432B CN114775432B CN202210389504.1A CN202210389504A CN114775432B CN 114775432 B CN114775432 B CN 114775432B CN 202210389504 A CN202210389504 A CN 202210389504A CN 114775432 B CN114775432 B CN 114775432B
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- 239000004567 concrete Substances 0.000 title claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 262
- 239000010959 steel Substances 0.000 claims abstract description 262
- 230000008093 supporting effect Effects 0.000 claims abstract description 44
- 238000010276 construction Methods 0.000 claims abstract description 32
- 210000001503 joint Anatomy 0.000 claims abstract description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 13
- 238000009826 distribution Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application provides an assembly bracket of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower, which comprises at least two rows of bracket steel pipe piles arranged along a forward bridge direction, wherein a plurality of bracket steel pipe piles are arranged along the transverse bridge direction, the top of each row of bracket steel pipe piles is provided with a bracket pile supporting beam extending along the transverse bridge direction, each row of bracket steel pipe piles comprises a sliding rail pile and a bearing steel pipe pile, a sliding rail beam extending along the forward bridge direction and erected above the bracket pile supporting beam is arranged between the sliding rail piles of two adjacent rows of bracket steel pipe piles, the sliding rail is in butt joint with a sliding system, and a bracket longitudinal supporting beam extending along the forward bridge direction and erected on the bracket pile supporting beam is arranged between the bearing steel pipe piles of two adjacent rows of steel pipe piles. The lower beam is assembled through the assembly bracket of the large-tonnage steel-concrete combined beam of the cable-stayed bridge, the assembly of the lower beam has a good supporting effect, the materials required by construction are saved, the transportation of the steel beam sections can be facilitated by adopting an assembly mode, and the transportation cost is reduced.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to an assembly bracket of a large-tonnage reinforced concrete combined beam of a cable-stayed bridge cable tower.
Background
At present, the large-span suspension bridge is a combined mode of a bridge tower and a lower cross beam, a main bridge and an approach bridge are supported on the bridge tower, vertical supporting force is provided for the main bridge and the approach bridge, and the movement of the main bridge and the approach bridge in the horizontal direction is limited by tower columns at two sides of the bridge tower. In the related art, two opposite sides of two tower bodies are respectively provided with bracket, the lower beam is positioned above the bracket, and when the lower beam is erected, a lower beam support system is usually required to be erected first, and the lower beam support system comprises a plurality of steel pipe piles which are arranged at intervals and used for supporting, support beams fixed at the top ends of the steel pipe piles, and the like.
Aiming at the lower beam bracket system in the related art, a great amount of construction materials such as steel pipes, steel pipe columns and the like are required to be consumed in order to ensure the supporting strength of the bracket system, and a certain improvement space exists.
Disclosure of Invention
The application aims to provide an assembled bracket of a large-tonnage reinforced concrete combined beam of a cable-stayed bridge cable tower, which is convenient to construct and low in cost.
In order to achieve the above object, the present application provides the following technical solutions:
The utility model provides a cable-stayed bridge cable tower large-tonnage steel and concrete combination crossbeam assemble support, includes along two at least rows of support steel-pipe piles that set up along the bridge, every row support steel-pipe pile has arranged many along the cross bridge to arranging, and every row support steel-pipe pile's top is equipped with along the support pile roof supporting beam that the cross bridge extends to, every row support steel-pipe pile includes track stake and bearing steel-pipe pile, and two adjacent rows be equipped with along the bridge to extending and erect between the track stake of sliding of support steel-pipe pile support pile roof supporting beam top slide track roof beam, slide track and the butt joint of sliding system, two adjacent rows be equipped with along the bridge to extending and erect between the bearing steel-pipe pile of support steel-pipe pile support longitudinal spandrel beam on the support pile roof supporting beam.
Further set up: the support longitudinal spandrel girder is provided with a lower cross beam temporary buttress for supporting the cross beam section, and a lower cross beam three-way jack is arranged between the lower cross beam temporary buttress and the support longitudinal spandrel girder.
Further set up: the temporary buttresses of the lower cross beam are arranged in a plurality along the length direction of the longitudinal spandrel girder of the bracket, and the temporary buttresses of the lower cross beam are uniformly distributed on the longitudinal spandrel girder of the bracket.
Further set up: and each row of support steel pipe piles is provided with two groups of sliding rail piles which are symmetrical with each other through the centers of two tower columns of the cable tower, and two groups of sliding rail beams are arranged corresponding to the sliding rail piles.
Further set up: and inclined struts are arranged between the sliding track beams and the support pile supporting beams.
Further set up: the bottom of the support steel pipe pile is provided with a support expansion foundation, and the support expansion foundation comprises a concrete casting part buried in the substrate.
Further set up: the bracket steel pipe pile adopts a steel pipe with phi of 820 mm by 10 mm.
Further set up: the distance between two adjacent rows of support steel pipe piles is 9m.
Compared with the prior art, the scheme of the application has the following advantages:
In the assembly bracket of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, the assembly of the lower beam is realized through the assembly bracket of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, so that the assembly of the lower beam can be well supported, the materials required by construction are saved, the energy-saving and environment-friendly requirements are met, and a good reference effect is provided for the subsequent similar engineering. And the steel beam sections can be conveniently transported in an assembling mode, so that the transportation cost is reduced.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an intelligent weight shifting apparatus according to the present application;
FIG. 2 is a schematic illustration of a mid-water skid stent of the present application for transporting steel tower segments and steel beam segments;
FIG. 3 is a schematic view of a mid-water skid bracket of the present application for transporting steel box girder segments;
FIG. 4 is a schematic view of a embankment staggered track arrangement in accordance with the present application;
FIG. 5 is a schematic view of an assembled bracket of a large-tonnage reinforced concrete composite beam of a cable stayed bridge pylon according to the application;
FIG. 6 is a schematic view of an assembled sliding bracket of a large-tonnage steel cross beam of a cable-stayed bridge cable tower.
In the figure, 1, a sliding bracket; 11. a water sliding bracket; 111. slide way steel pipe piles; 112. a first slideway beam; 113. a slideway bearing beam; 114. a slideway diagonal bracing; 12. a land sliding support; 121. expanding a foundation; 122. a second slideway beam; 123. a foundation spandrel girder; 124. a third slideway beam; 13. a embankment staggered track arrangement structure; 131. a concrete structure; 2. the splicing bracket of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower; 211. sliding rail piles; 212. bearing steel pipe piles; 22. supporting beams are supported on the support piles; 23. a slip rail beam; 24. a support longitudinal spandrel girder; 25. diagonal bracing; 26. a lower beam temporary buttress; 3. splicing sliding brackets of large-tonnage steel cross beams of cable-stayed bridge towers; 31. supporting the steel pipe pile; 32. supporting pile-supporting beams; 33. bailey spandrel girder; 34. a distribution beam; 35. temporary buttresses.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
Referring to fig. 1, for the construction of a double-tower double-cable-surface semi-floating system hybrid beam cable-stayed bridge, the application provides an intelligent weight shifting device and a multifunctional bracket for a steel cross beam of the cable-stayed bridge, which are used for completing the sliding and the installation of a steel tower column, the steel cross beam and a steel box beam in place, so that the construction efficiency can be effectively improved, and the occupied time of a channel can be reduced.
The cable-stayed bridge constructed by the application adopts an H-shaped primary-secondary tower, the cable tower comprises two tower columns and three beams arranged between the tower columns, each tower column of the cable tower is divided into 30 sections, the lower beam is of a steel-concrete combined structure, the lower beam can be divided into 6 sections, the middle beam and the upper beam are of steel structures, the middle beam is divided into 7 sections, and the upper beam is divided into 6 sections. In addition, the main girder of the cable-stayed bridge spans the water channel and the flood control dyke.
Referring to fig. 1 to 3, the intelligent weight shifting device is utilized to respectively transport the steel tower section, the steel beam section and the steel box girder section to a place to be constructed, so that the construction is convenient. The intelligent heavy object displacement device includes the slip support 1, slips the dolly and is used for pulling the dolly is followed slip support 1 removes traction mechanism, wherein, slip support 1 is including the aquatic slip support 11 and the land slip support 12 that meet, because the main bridge of the cable-stayed bridge of this embodiment strides across water course and flood control dyke, the setting of aquatic slip support 11 can reduce the bridge construction spare and unload the occupation of ship course and to the influence of river dyke, original place appearance, can improve simultaneously to the transportation speed and the efficiency of bridge construction spare.
The underwater sliding support 11 extends along the bridge direction and comprises a slide steel pipe pile 111 inserted into the water and a first slide beam 112, wherein the slide steel pipe piles 111 are arranged along a preset path of the first slide beam 112. Meanwhile, in this embodiment, two sets of slide steel pipe piles 111 and a first slide beam 112 are arranged along the forward bridge direction, each set of slide steel pipe piles 111 is provided with two rows, the tops of the slide steel pipe piles 111 of each set of two rows are provided with slide spandrel beams 113 which are connected in a one-to-one correspondence manner, and the first slide beam 112 is arranged on the slide spandrel beams 113 so as to distribute the load transported on the first slide beam 112 to the two slide steel pipe piles 111 connected with the slide spandrel beams 113 through the slide spandrel beams 113.
Specifically, for the transportation of the steel tower segment and the steel beam segment, two rows of first slide beams 112 are arranged in each group, the steel tower segment and the steel beam segment are supported by the two rows of first slide beams 112, the normal transportation of the steel tower segment and the steel beam segment can be ensured, and the two groups of first slide beams 112 can be transported synchronously. And for the steel box girder segments with longer length, each group of the first slideway girders 112 can be provided with one row, and two groups of single rows of the first slideway girders 112 are utilized to support the two ends of the steel box girders for conveying, so that the transportation of the steel box girder segments with longer length can be satisfied while the use of profile steel can be reduced. Namely, constructors can select different combination modes of the slideway beams in the intelligent weight shifting device according to the length of bridge construction members to be transported, and the construction applicability is high.
Preferably, the steel pipe pile of the application adopts a steel pipe with phi 820 multiplied by 10mm, the length of a single section of the steel pipe is 12m, the steel pipe can be treated by pile splicing or cutting at the position of the steel pipe pile which does not reach the elevation, and the DZ135 vibration pile is adopted to vibrate the steel pipe pile.
When the underwater sliding support 11 is erected, a trestle (not shown in the figure) can be constructed between two groups of preset steel pipe piles so as to facilitate construction of the underwater sliding support 11. The trestle width of this embodiment sets up to 9m, adopts phi 630 x 8 mm's steel pipe as the steel-pipe pile, just the trestle is along the horizontal bridge to arranging three row steel-pipe pile altogether, and three rows the lateral spacing of steel-pipe pile is 3m, and the longitudinal spacing of two adjacent steel-pipe piles of every row steel-pipe pile is 7m. Simultaneously, two adjacent steel pipe piles are connected in parallel by adopting steel pipes with diameter of 377 multiplied by 6mm, a trestle pile top bearing beam and a trestle longitudinal bearing beam are arranged on the pile tops of the two adjacent steel pipe piles, the trestle pile top bearing beam and the trestle longitudinal bearing beam are both positioned on I145a section steel, then I122a section steel is arranged on the trestle longitudinal bearing beam as distribution quantity, and finally a pattern steel plate with the length of 1cm is paved. The trestle of this embodiment also adopts "fishing method" to carry out the construction, and the fishing method construction is usually by hoisting equipment such as crawler crane cooperation vibratory hammer vibration pile sinking, and hoisting equipment installs the stake superstructure simultaneously to from the dyke to the operation method of aquatic construction by span. When the underwater sliding support 11 is constructed by the trestle, firstly, two rows of the slideway steel pipe piles 111 which are close to the embankment and are arranged along the transverse bridge direction are inserted and beaten on the trestle by adopting a crawler crane, a track beam is paved, then, the underwater sliding support 11 is constructed from the embankment to the water according to the steps of constructing the two rows of the slideway steel pipe piles 111 which are arranged along the transverse bridge direction each time, and the track beams constructed each time are butted. The construction of the two sets of slide steel pipe piles 111 of the underwater sliding support 11 can be performed separately or simultaneously.
In order to ensure the vibration setting and lowering verticality of the slide steel pipe pile 111, when the slide steel pipe pile 111 is inserted, a steel pipe pile vibration setting guide frame (not shown in the figure) can be processed and assisted, and the slide spandrel girder 113 can be aligned to the slide steel pipe pile 111 for placement, so that the normal stress of the slide spandrel girder 113 and the slide steel pipe pile 111 is ensured when bridge construction members are transported.
The land sliding support 12 comprises an enlarged foundation 121 and a second sliding rail beam 122, wherein the enlarged foundation 121 is arranged along a preset path of the second sliding rail beam 122, the enlarged foundation 121 and the second sliding rail beam 122 are arranged in two groups corresponding to the sliding rail steel pipe piles 111 and the first sliding rail beams 112 of the underwater sliding support 11, and the rows of the second sliding rail beams 122 are connected with the first sliding rail beams 112 in a one-to-one correspondence manner so that bridge construction members transported by the underwater sliding support 11 can be transported to a cable tower or a steel box girder connection position for installation through the land sliding support 12.
The expansion foundation 121 of the land sliding support 12 adopts a C30 expansion foundation, the expansion foundation 121 is reinforced according to the structure, a steel plate is embedded at the top of the expansion foundation 121, the embedding of the steel plate can strengthen the structural strength of the expansion foundation 121, I45a section steel extending along the transverse bridge direction is laid on the expansion foundation 121 as a foundation spandrel girder 123, and the foundation spandrel girder 123 is welded with the steel plate embedded in the expansion foundation 121. The second slide rail beam 122 is disposed on the base spandrel girder 123, and in this embodiment, HN900×300 steel is preferably used as the second slide rail beam 122.
The diagonal braces 25 are respectively arranged between the first slideway beam 112 and the slideway spandrel girder 113 connected with the first slideway beam and between the second slideway beam 122 and the foundation spandrel girder 123 connected with the second slideway beam, the diagonal braces 25 are respectively arranged on two sides of the slideway beams and are welded and fixed with the spandrel girders corresponding to the slideway beams, I14 section steel is preferably adopted as the diagonal braces 25 in the embodiment, meanwhile, 36# channel steel can be paved in the slideway beams as a chute and a guiding device, and 16Mn steel with the thickness of 2cm is paved in the chute as a contact surface of the sliding trolley. The 16Mn steel has good comprehensive mechanical properties, the 16Mn steel contains manganese, the yield strength of the steel can be improved by 50%, the atmospheric corrosion resistance is improved by about 20-38%, and the low-temperature impact toughness is better than that of steel A3.
Referring to fig. 4, since the sliding support 1 of the present application needs to extend from the embankment into the water, that is, the sliding support 1 needs to cross the river embankment, the road occupied by the track can be avoided by the staggered track arrangement structure 13 of the embankment of the sliding support 1 at the position crossing the river embankment, and the normal traffic is ensured.
The staggered track arrangement structure 13 of the embankment comprises a concrete structure 131 poured on the road of the original river embankment, the concrete structure 131 is provided with a groove extending along the bridge direction, a chute beam is embedded in the groove of the concrete structure 131, the chute beam is higher than the original road surface, the top surface of the concrete structure 131 is flush with the top surface of the chute beam, and the collision between a vehicle and the chute beam when passing through the concrete structure 131 is avoided. The slope is pour along the both ends side of river levee road direction to concrete structure 131, and this slope is 1%, and the setting of slope can make things convenient for the vehicle to pass through concrete structure 131.
Preferably, the concrete structure 131 is poured by adopting C30 concrete, and reinforcing steel bars are built in the concrete structure, so that the embankment staggered track arrangement structure 13 has enough bearing capacity.
When the intelligent weight shifting device is not needed to be used for transporting bridge construction members, the steel plate can be used for covering the slideway beam, so that the vehicle can pass conveniently, and meanwhile, the slideway beam can be protected.
When the intelligent weight shifting device is used for transporting bridge construction parts, the sliding trolley and the traction device are installed on the sliding bracket 1. The sliding trolley adopts a crawler-type carrying small tank, the sliding trolley is matched with the slideway beams, the traction mechanism adopts a winch, and in order to ensure traction balance, the end sides of two groups of slideway beams of the land sliding support 12 are respectively provided with a traction point, and the matched fixed pulley, movable pulley and steel wire rope are selected according to the tonnage of the winch. When the sliding mechanism is used for transporting bridge construction members, after the steel tower sections, the steel beam sections and the steel box girder sections are transported to the site by adopting a barge, the steel tower sections, the steel beam sections and the steel box girder sections are unloaded by utilizing a floating crane and are hung on the sliding trolley of the sliding support 1, the steel wire rope of the traction mechanism is connected with the sliding trolley of the bridge construction members for transportation at two points to traction the sliding trolley to slide along the sliding support 1, and the friction between the bridge construction members and the sliding support 1 is reduced by the arrangement of the sliding trolley.
Specifically, the sliding construction steps of the steel tower segment or the steel beam segment with shorter transportation length are as follows:
Firstly, a steel tower section or a steel beam section is supported on a sliding support 1 in a ship unloading manner, four 150t crawler-type small carrying tanks can be adopted for four-point support and transportation, the positions of the four crawler-type small carrying tanks can be adjusted according to the sizes of the sections of the steel tower section or the steel beam, and the forward-bridge center line of the crawler-type small carrying tanks is coincident with or basically coincident with the center line of a sliding rail. In addition, in order to improve the transportation to steel tower section or steel crossbeam section, set up the transport platform on four crawler-type transport small tanks to turn into the face support with the point support, ensure the stability of bridge construction transportation, but transport platform and slippage dolly between be separable state.
Subsequently, the traction device is installed. The winch is arranged on the end side of the sliding support 1, meanwhile, a welding lug plate and a pin shaft are arranged on the transportation platform, a steel wire rope of the winch is buckled on the pin shaft by adopting a shackle, and the transportation platform is pulled by the winch to drive the steel tower section or the steel beam section to slide.
Then, starting a winch to gradually tighten the steel wire rope so as to draw the steel tower section or the steel beam section to slide to a precise position for positioning and installation. In addition, since the two tower columns of the cable tower are respectively arranged at the two sides of the sliding bracket 1, the steel tower sections need to correspondingly transversely move below the tower columns for hoisting.
For the transverse sliding of the steel tower segment, the land sliding support 12 of this embodiment may be divided into a longitudinal sliding mechanism and a transverse sliding mechanism which are vertically intersected, where the longitudinal sliding mechanism is arranged along the forward bridge direction, and includes the second slide rail beam 122 butted with the first slide rail beam 112 and the expansion foundation 121 arranged along the extending path of the second slide rail beam 122, the transverse sliding mechanism is located at one side of the longitudinal sliding mechanism close to the cable tower, and the transverse sliding mechanism is arranged along the transverse bridge direction and includes the third slide rail beam 124 perpendicular to the second slide rail beam 122, and the bottom of the third slide rail beam 124 is correspondingly provided with the expansion foundation 121 for supporting. The transverse sliding support 1 is provided with a transverse sliding trolley, the sliding trolley on the longitudinal sliding support 1 is recorded as a longitudinal sliding trolley, and the upper end side of the transverse sliding support 1 is provided with a winch connected with the transverse sliding trolley so as to drag the transverse sliding trolley loaded with the steel tower section to slide to the steel tower lifting position.
The intersection of the transverse sliding support 1 and the longitudinal sliding support 1 is provided with a lifting mechanism (not shown in the figure), the lifting mechanism is used for transferring the steel tower section on the longitudinal sliding trolley to the transverse sliding trolley, and the lifting mechanism preferably adopts a hydraulic jack. The steel tower segment longitudinally moves to the intersection of the longitudinal sliding support 1 and the transverse sliding support 1, the hydraulic jack is used for lifting the supporting platform to separate from the longitudinal sliding trolley, the longitudinal sliding trolley is led to exit from the intersection of the longitudinal sliding support 1 and the transverse sliding support 1, then the transverse sliding trolley is installed at the intersection, the transverse sliding trolley also adopts a crawler-type carrying small tank, and the hydraulic jack is driven to drive the supporting platform and the steel tower segment to fall onto the transverse sliding trolley, and the winch is used for transversely moving to the hoisting position of the steel tower.
And finally, after the steel tower section or the steel beam section slides in place, lifting and installing by adopting an automobile crane.
The sliding construction steps of the steel box girder segments with longer transportation length are the same as those of bridge construction members with shorter transportation length, the transportation of the steel box girder segments requires synchronous operation of sliding trolleys on two groups of slideway girders, and rubber pads are arranged on the sliding trolleys to be in contact with the girder bottoms of the steel box girder segments, so that friction force can be improved, and abrasion to the steel box girder segments can be avoided. Meanwhile, because the steel box girder segment has larger weight, when the traction device is installed, a counterforce seat is required to be installed on the steel box girder bottom plate, then the welding lug plate and the pin shaft are installed on the counterforce seat, and the steel wire rope is wound by the winding machine to draw the steel box girder to slide to the installation position along the forward bridge direction.
Referring to fig. 5 and 6, the steel tower segment, the steel beam segment and the steel box girder segment are transported to a construction site to be installed by adopting an intelligent weight shifting device, wherein the steel beam segment is required to be assembled to form a steel beam and then is installed on a cable-stayed bridge, and the assembly of the steel beam is completed by adopting a multifunctional bracket of the cable-stayed bridge steel beam. The multifunctional support for the steel cross beam of the cable-stayed bridge comprises an assembly support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge and an assembly sliding support 3 for the large-tonnage steel cross beam of the cable-stayed bridge, wherein the assembly support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge is used for providing support for the assembly of a lower cross beam, the assembly sliding support 3 for the large-tonnage steel cross beam of the cable-stayed bridge takes the assembly support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge as a foundation and is built above the assembly support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge, and the assembly sliding support 3 for the large-tonnage steel cross beam of the cable-stayed bridge is used for providing support for the assembly of a middle cross beam and an upper cross beam.
Specifically, the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower comprises a plurality of support steel pipe piles which are arranged between two tower columns of the cable tower along the transverse bridge direction, wherein at least two rows of support steel pipe piles are arranged along the longitudinal bridge direction, and a support pile supporting beam 22 extending along the transverse bridge direction is arranged at the top of each row of support steel pipe piles. Each row of support steel pipe piles comprises a sliding track pile 211 and a bearing steel pipe pile 212, a sliding track beam 23 erected on a support pile top bearing beam 22 is arranged between two adjacent rows of sliding track piles 211 of the support steel pipe piles, the sliding track beam 23 extends along the bridge direction, and the sliding track beam 23 is in butt joint with an intelligent weight shifting device, so that a steel beam section can be transferred to an assembly support 2 of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower through the sliding track beam 23 by the intelligent weight shifting device. And a support longitudinal spandrel girder 24 erected on the support pile top spandrel girder 22 is also arranged between two adjacent rows of support steel pipe piles, and the support longitudinal spandrel girders 24 extend along the forward bridge direction and are arranged in one-to-one correspondence with the support steel pipe piles of each row.
In addition, each row of support steel pipe piles is provided with two groups of sliding track piles 211, and the two groups of sliding track piles 211 are symmetrically arranged with two tower columns of the cable tower in the center. In a preferred embodiment, 12 support steel pipe piles are arranged in each row, wherein 4 support steel pipe piles are used as the sliding track piles 211, and the 4 sliding track piles 211 are divided into two groups; the remaining 8 support steel pipe piles are taken as bearing steel pipe piles 212,8 the bearing steel pipe piles 212 are divided into three groups according to the distribution relation of 2, 4 and 2, the three groups of bearing steel pipe piles 212 are arranged between the two groups of sliding track piles 211 and on two sides at intervals, and the bearing steel pipe piles 212 arranged between the two groups of sliding track piles 211 are provided with 4 bearing steel pipe piles.
The sliding track beams 23 are also arranged in one-to-one correspondence with the sliding track piles 211 of each row, diagonal braces 25 are arranged between the sliding track beams 23 and the support pile supporting beams 22, and the diagonal braces 25 can prevent the sliding track beams 23 from shaking left and right and play a role in drawknot and skew prevention, so that the stability of the sliding track beams 23 is ensured when the steel cross beams are transferred onto the spliced support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower.
The support longitudinal spandrel girder 24 is provided with a lower beam temporary buttress 26 for supporting the steel beam, a lower beam three-way jack (not shown in the figure) is arranged between the lower beam temporary buttress 26 and the support longitudinal spandrel girder 24, and the lower beam three-way jack can realize the adjustment in the front-back direction, the left-right direction and the up-down direction, so that the purpose of adjusting the position of the steel beam can be achieved through the position of the lower beam three-way jack.
Further, a plurality of lower beam temporary buttresses 26 are provided along the length direction of the bracket longitudinal spandrel girder 24, and the plurality of lower beam temporary buttresses 26 are uniformly distributed on the bracket longitudinal spandrel girder 24. The plurality of lower beam temporary buttresses 26 are arranged on each support longitudinal spandrel girder 24, so that the steel beams arranged on the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower can be supported in multiple points, the steel beams can be regulated in multiple points, and the adjustability and the supporting stability of the positions of the steel beams are improved.
Preferably, the bracket steel pipe piles of the spliced bracket 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower of the embodiment are all steel pipes with phi 820 mm by 20mm, the bracket pile top bearing beam 22 is I45 a-shaped steel, and the bracket longitudinal bearing beam 24 is also preferably I45 a-shaped steel. In addition, the support steel pipe pile of this embodiment is provided with two rows along the bridge along, and two rows support steel pipe pile's interval is 9m.
In addition, a bracket expansion foundation is arranged at the bottom of an assembly bracket 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, and comprises a concrete pouring piece buried in a substrate. When the construction of the support expansion foundation is carried out, firstly, the earthwork of the foundation area to be expanded is excavated by adopting an excavating machine, and the foundation is replaced, filled and compacted, so that the bearing capacity of the foundation is ensured to meet the design requirement. And then installing embedded bars at the foundation where earthwork is excavated and pouring concrete to complete the construction of the support expansion foundation, then carrying out the construction of the steel pipe pile on the support expansion foundation, and welding and fixing the steel pipe pile and the embedded bars in the support expansion foundation.
Meanwhile, in order to facilitate the transportation of the steel pipe pile, the steel pipe pile is processed into 12 m/section standard sections, the steel pipe pile standard sections are transported to a construction site and then are connected, and when the pile is connected, the pile top of the bottom section pile is 1m high, the other steel pipe pile standard section is hoisted for lengthening.
Secondly, the splicing sliding support 3 of the large-tonnage steel and concrete combined beam of the cable-stayed bridge cable tower is built on the splicing support 2 of the large-tonnage steel and concrete combined beam of the cable-stayed bridge cable tower, the upper and lower beams are based on the splicing support 2 of the large-tonnage steel and concrete combined beam of the cable-stayed bridge cable tower, the upper and lower beams comprise at least two rows of supporting steel pipe piles 31 arranged along the forward direction of the cable, the number of the rows of the supporting steel pipe piles 31 corresponds to the number of the rows of the supporting steel pipe piles of the splicing support 2 of the large-tonnage steel and concrete combined beam of the cable-stayed bridge cable tower, and each row of the supporting steel pipe piles 31 comprises a plurality of supporting steel pipe piles 31 arranged along the transverse direction of the cable. The top of the supporting steel pipe pile 31 is sequentially provided with a supporting pile supporting beam 32, a bailey supporting beam 33 and a distributing beam 34 from bottom to top, wherein the supporting pile supporting beam 32 extends along the forward bridge direction and is connected with two adjacent rows of supporting steel pipe piles 31, and the supporting pile supporting beam 32 is provided with a plurality of supporting steel pipe piles 31 in a one-to-one correspondence with each row. The bailey spandrel girder 33 extends along the transverse bridge direction and is erected on the plurality of supporting pile top spandrel girders 32, and the bailey spandrel girder 33 is formed by splicing bailey frame standard knots, is convenient to transport and assemble and disassemble, and has good structural rigidity, durability and service life. The distribution beams 34 extend along the longitudinal bridge direction and are provided with a plurality of distribution beams 34 which are paved above the bailey frames along the transverse bridge direction.
Preferably, the supporting steel pipe piles 31 in the present embodiment are preferably phi 820×10mm, four supporting steel pipe piles 31 are arranged in each row, the distance between two adjacent supporting steel pipe piles 31 in each row is 9m, and the two adjacent supporting steel pipe piles 31 in each row are connected by parallel steel pipes (not labeled in the figure) along the transverse bridge direction. Meanwhile, as the two rows of steel pipe piles are arranged on the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable-stayed tower of the embodiment, the number of the rows of the support steel pipe piles 31 corresponding to the number of the rows of the support steel pipe piles is also two, the distance between the two rows of the support steel pipe piles 31 is 9m, the two adjacent rows of the support steel pipe piles 31 are connected through steel pipe parallel joints (not labeled in the figure) extending along the forward bridge direction, the steel pipe parallel joints are arranged in a way of being in one-to-one correspondence with the support steel pipe piles 31 of each row, and the two adjacent steel pipe parallel joints connected to each row and the two adjacent steel pipe parallel joints connected with each other adopt steel pipes with phi 425 multiplied by 5 mm. In addition, the pile-supporting roof support beam 32 is preferably made of HN900×300 steel, and the distribution beam 34 is preferably made of I22 steel.
Each distribution beam 34 is provided with a plurality of temporary buttresses 35 along the length direction of the distribution beam 34, the temporary buttresses 35 are uniformly arranged along the length direction of the distribution beam 34, the temporary buttresses 35 are used for carrying out multi-point support on the steel cross beams placed on the assembly sliding support 3 of the large-tonnage steel cross beam of the cable-stayed bridge cable tower, meanwhile, three-way jacks are arranged between the bottoms of the temporary buttresses 35 and the distribution beam 34, and then the steel cross beams can be subjected to multi-point adjustment, so that the plane positions of the steel cross beam sections are adjusted.
In summary, the multifunctional bracket for the steel cross beam of the cable-stayed bridge is adopted to assemble the upper cross beam, the middle cross beam and the lower cross beam respectively, wherein the assembly bracket 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge is adopted to assemble the lower cross beam, after the lower cross beam is assembled, the assembly sliding bracket 3 for the large-tonnage steel cross beam of the cable-stayed bridge is built on the basis of the assembly bracket 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge, and then the assembly of the middle cross beam and the upper cross beam is completed through the assembly sliding bracket 3 for the large-tonnage steel cross beam of the cable-stayed bridge.
Therefore, the assembly of the steel cross beam by adopting the multifunctional bracket for the cable-stayed bridge steel cross beam specifically comprises the following steps:
firstly, hoisting the steel beam section to the multifunctional bracket of the cable-stayed bridge steel beam.
Secondly, splicing and welding the steel cross beam block by block from the middle to two ends of the steel cross beam so as to finish the installation of the steel cross beam.
Specifically, when the lower beam is assembled, the steel beam section positioned in the middle of the lower beam is firstly hoisted onto the assembly bracket 2of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower by utilizing an automobile crane, and the position of the steel beam section is regulated to enable the center line of the steel beam along the transverse direction to be coincident or approximately coincident with the center line of the steel tower. And then hoisting the steel beam section adjacent to the first steel beam section to the assembly bracket 2of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, wherein the steel beam section is supported on the temporary buttress 35 of the assembly bracket 2of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, and the position of the temporary buttress 35 can be adjusted through a three-way jack so as to adjust the position and the elevation of the steel beam section placed on the temporary buttress 35 and enable the steel beam section to be accurately butted with the first steel beam section. And (3) temporarily fixing the two steel beam sections by adopting a welding horse plate, and carrying out layered welding on joints of the two steel beam sections and carrying out weld detection.
Then, the two steel beam sections on two sides of the welded steel beam sections are respectively hoisted to the splicing bracket 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, and the two steel beam sections can be respectively marked as a section ③ and a section ④. In this embodiment, the weight of the segments ③ and ④ is relatively large, the steel beam segments are transported to the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower by the sliding track beam 23 of the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, and simultaneously, the planar positions and the elevations of the segments ③ and ④ are adjusted by the three-way jack, so that the two segments are accurately butted with two sides of the assembled two steel beam segments respectively, the segments ③ and ④ are temporarily fixed by adopting the welding Ma Banfan respectively, and then the joints are welded in a layered manner and the welding seam is detected.
And then the steel beam sections on the intelligent weight shifting device are lifted by the automobile crane and are placed on two sides of the assembled steel beam, the steps are repeated, the plane positions and the elevations of the steel beam sections on the assembly support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower which is subsequently lifted by the three-way jack are adjusted, the steel beam sections to be assembled are accurately butted with the assembled steel beam sections, and finally the lower beam is assembled by welding.
And after the lower beam is assembled, assembling the assembled sliding support 3 of the large-tonnage steel beam of the cable-stayed bridge cable tower on the basis of the assembled support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, so as to assemble the middle beam and the upper beam. When the middle beam or the upper beam is assembled, the steel beam sections transported by the intelligent weight shifting device are hoisted by adopting an automobile crane to the assembly sliding bracket 3 of the large-tonnage steel beam of the cable-stayed bridge cable tower, and are assembled according to the sequence from the middle to the two sides of the steel beam, the plane positions and the elevations of the steel beam sections are adjusted through three-way jacks during assembly, so that the steel beam sections on the two sides are precisely positioned with the steel beam sections assembled in the middle, and after the steel beam sections are temporarily fixed by utilizing a welding horse plate, joints of the steel beam sections are welded in a layered mode and welded in a welding line detection mode, and the assembly of the middle beam or the upper beam can be completed. And finally, hoisting the assembled middle cross beam and upper cross beam to a cable tower cross beam installation position by a lifting device for welding and fixing.
In addition, the steel beam sections are welded in a mode of connecting and welding through the joint girth and the stiffening rib, temporary fixing parts such as the welding horse plates and the like are required to be removed after primary welding seams are subjected to bottoming and filling, the welding horse plates are required to be removed twice, part of the welding horse plates are removed after bottoming is completed, the distance between the rest of the welding horse plates cannot exceed 1.5m, and the rest of the welding horse plates are removed after filling is completed. The temporary fixing parts such as the welded horse plates and the like must be removed by adopting a flame cutting or carbon arc gouging method, the parent metal must not be damaged, and powerful dismantling is forbidden so as not to tear the parent metal.
The foregoing is only a partial embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (8)
1. The utility model provides a cable-stayed bridge cable tower large-tonnage steel and concrete combination crossbeam assemble support, its characterized in that includes along two at least rows of support steel-pipe piles that set up along the bridge, every row support steel-pipe pile has arranged many along the cross bridge to arranging, and every row support steel-pipe pile's top is equipped with along the support pile head spandrel girder that the cross bridge extends, every row support steel-pipe pile includes slip track stake and bearing steel-pipe pile, two adjacent rows be equipped with between the slip track stake of support steel-pipe pile along the bridge to extend and erect the slip track roof beam of support pile head spandrel girder top, slip track roof beam with be used for transporting steel tower section, steel beam section and steel box girder section respectively to wait the intelligent heavy object shifter butt joint of construction department, two adjacent rows be equipped with along extending along the bridge to and erect between the bearing steel-pipe pile of support steel-pipe pile the support vertical spandrel girder on the support pile head spandrel girder.
2. The spliced bracket of the large-tonnage reinforced concrete combined beam of the cable-stayed bridge cable tower according to claim 1, wherein a lower beam temporary buttress for supporting a beam section is arranged on the bracket longitudinal spandrel girder, and a lower beam three-way jack is arranged between the lower beam temporary buttress and the bracket longitudinal spandrel girder.
3. The spliced bracket of the large-tonnage reinforced concrete combined beam of the cable-stayed bridge cable tower according to claim 2, wherein a plurality of temporary buttresses of the lower beam are arranged along the length direction of the longitudinal spandrel girder of the bracket, and the temporary buttresses of the lower beam are uniformly distributed on the longitudinal spandrel girder of the bracket.
4. The spliced bracket of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, wherein two groups of sliding rail piles which are symmetrical with each other with the centers of two tower columns of the cable tower are arranged on each row of bracket steel pipe piles, and two groups of sliding rail beams are arranged corresponding to the sliding rail piles.
5. The spliced bracket of a large-tonnage steel and concrete combined beam of a cable-stayed bridge cable tower according to claim 1, wherein a diagonal bracing is arranged between the sliding track beam and the bracket pile-supporting beam.
6. The spliced bracket of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 1, wherein a bracket expansion foundation is arranged at the bottom of the bracket steel pipe pile, and comprises a concrete casting part buried in a substrate.
7. The spliced bracket of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, wherein the bracket steel pipe pile adopts a steel pipe with phi 820 multiplied by 10 mm.
8. The spliced bracket of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, wherein the distance between two adjacent rows of bracket steel pipe piles is 9m.
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| CN202210389504.1A CN114775432B (en) | 2022-04-13 | 2022-04-13 | Splicing bracket of large-tonnage steel-concrete combined beam of cable-stayed bridge cable tower |
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| CN202210389504.1A CN114775432B (en) | 2022-04-13 | 2022-04-13 | Splicing bracket of large-tonnage steel-concrete combined beam of cable-stayed bridge cable tower |
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