CN114775432A - Assembling support of large-tonnage reinforced concrete combined cross beam of cable-stayed bridge cable tower - Google Patents
Assembling support of large-tonnage reinforced concrete combined cross beam of cable-stayed bridge cable tower Download PDFInfo
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- CN114775432A CN114775432A CN202210389504.1A CN202210389504A CN114775432A CN 114775432 A CN114775432 A CN 114775432A CN 202210389504 A CN202210389504 A CN 202210389504A CN 114775432 A CN114775432 A CN 114775432A
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- 239000011150 reinforced concrete Substances 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 239
- 239000010959 steel Substances 0.000 claims abstract description 239
- 230000008093 supporting effect Effects 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 27
- 210000001503 joint Anatomy 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 21
- 230000007246 mechanism Effects 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004035 construction material Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000007667 floating 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
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect 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
- 238000000926 separation method Methods 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
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- 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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Abstract
The application provides a cable-stay bridge cable-tower large-tonnage steel-concrete combination beam's support of assembling, it includes along following the two rows at least support steel-pipe piles that the bridge set up to the bridge, every row of support steel-pipe piles has arranged many along the transversal bridge to arranging, and every row of support steel-pipe piles's top is equipped with along the transversal bridge to the support pile top spandrel girder that extends, every row of support steel-pipe piles is including slide rail pile and bearing steel-pipe pile, be equipped with along following the bridge to extending and erect the slide rail roof beam in support pile top spandrel girder top between adjacent two rows of support steel-pipe piles's the slide rail pile, slide rail and the butt joint of system of sliding, be equipped with along following the bridge to extending and erect the vertical spandrel girder of support on support pile top spandrel girder between adjacent two rows of support steel-pipe piles's bearing steel-pipe pile. The lower cross beam is assembled through the assembling support of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower, so that a good supporting effect is achieved on the assembling of the lower cross beam, materials required by construction are saved, the steel cross beam segments can be conveniently transported by adopting an assembling mode, and the transportation cost is reduced.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to an assembling support of a large-tonnage steel-concrete combined cross beam of a cable-stayed bridge cable tower.
Background
At present, a large-span suspension bridge is mostly in 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 to provide vertical supporting force for the main bridge and the approach bridge, and tower columns on two sides of the bridge tower limit the horizontal movement of the main bridge and the approach bridge. In the related art, two opposite sides of two tower bodies are respectively provided with a bracket, a lower beam is positioned above the bracket, when the lower beam is erected, a lower beam support system is usually erected, and the lower beam support system comprises a plurality of steel pipe piles arranged at intervals for supporting, a support beam fixed at the top end of the steel pipe pile and the like.
Aiming at a lower cross beam support system in the related art, in order to ensure the support strength of the support system, a large amount of construction materials such as steel pipes, steel pipe columns and the like need to be consumed, and a certain improvement space exists.
Disclosure of Invention
The purpose of this application aims at providing one kind and builds convenient and with low costs cable-stay bridge cable-stayed tower large-tonnage steel-concrete combination beam's support of assembling.
In order to achieve the above object, the present application provides the following technical solutions:
the utility model provides a cable-stay bridge cable-stayed tower large-tonnage steel-concrete combination beam's support of assembling, includes along two rows at least support steel-pipe piles that set up along the bridge to every row the support steel-pipe pile is arranged along the cross bridge to having many, and every row the top of support steel-pipe pile is equipped with along the support pile top spandrel girder of cross bridge to extension, every row the support steel-pipe pile is including sliding track pile and bearing steel-pipe pile, adjacent two rows be equipped with along extending and erectting along the bridge to between the sliding track pile of support steel-pipe pile the sliding track roof spandrel girder of support pile top spandrel girder top, sliding track and sliding system dock, adjacent two rows be equipped with along extending along the bridge to and erect the vertical spandrel girder of support on the support pile top spandrel girder between the bearing steel-pipe pile of support steel-pipe pile.
Further setting: the support is characterized in that a lower cross beam temporary buttress used for supporting the cross beam section is arranged on the longitudinal bearing beam of the support, and a lower cross beam three-way jack is arranged between the lower cross beam temporary buttress and the longitudinal bearing beam of the support.
Further setting: the lower cross beam temporary buttresses are arranged in a plurality along the length direction of the longitudinal bearing beam of the support, and the lower cross beam temporary buttresses are uniformly distributed on the longitudinal bearing beam of the support.
Further setting: and each row of support steel pipe piles is provided with two groups of sliding track piles which are centrosymmetric with two tower columns of the cable tower, and the sliding track beams are provided with two groups corresponding to the sliding track piles.
Further setting: and an inclined strut is arranged between the sliding track beam and the bearing beam of the support pile top.
Further setting: the support steel pipe pile bottom sets up support enlarged foundation, support enlarged foundation includes the concrete placement who buries underground in the basement.
Further setting: the support steel pipe pile adopts
The steel pipe of (3).
Further setting: the distance between two adjacent rows of support steel pipe piles is 9 m.
Compared with the prior art, the scheme of the application has the following advantages:
in the assembly support of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower, the assembly of the lower cross beam is realized through the assembly support of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower, so that the lower cross beam can be well supported, the required construction materials are saved, the requirements of energy conservation and environmental protection are met, and a good reference effect is provided for subsequent similar engineering. And the mode of adopting to assemble can make things convenient for the transportation of steel crossbeam segmental, reduces the cost of transportation.
Additional aspects and advantages of the present 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 present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an intelligent weight shifting device in the present application;
FIG. 2 is a schematic diagram of the underwater sliding support used for transporting the steel tower segment and the steel beam segment in the application;
FIG. 3 is a schematic view of an underwater skidding support for transporting steel box girder segments in the present application;
FIG. 4 is a schematic view of an embankment staggered track arrangement according to the present application;
fig. 5 is a schematic view of an assembly bracket of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower in the application;
fig. 6 is a schematic diagram of an assembling sliding support of a large-tonnage steel cross beam of a cable-stayed bridge cable tower in the application.
In the figure, 1, a sliding bracket; 11. a support slipping in water; 111. a slideway steel pipe pile; 112. a first slideway beam; 113. a slideway spandrel girder; 114. a slideway diagonal brace; 12. land sliding supports; 121. expanding the foundation; 122. a second slideway beam; 123. a foundation spandrel girder; 124. a third slideway beam; 13. the embankment is in a staggered track arrangement structure; 131. a concrete structure; 2. sliding the trolley; 2. the splicing support comprises a splicing support of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower; 211. sliding the track pile; 212. bearing the steel pipe pile; 22. supporting a pile top bearing beam; 23. sliding the track beam; 24. a longitudinal bearing beam of the bracket; 25. bracing; 26. a lower beam temporary buttress; 27. expanding the foundation by using a bracket; 3. assembling a sliding support of a large-tonnage steel cross beam of a cable-stayed bridge cable tower; 31. supporting the steel pipe pile; 32. supporting a bearing beam at the top of the pile; 33. bailey spandrel girder; 34. a distribution beam; 35. and (5) temporary buttresses.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1, aiming at the construction of a double-tower double-cable-side semi-floating body system hybrid beam cable-stayed bridge, the application provides an intelligent weight shifting device and a multifunctional bracket for a steel beam of the cable-stayed bridge, so as to complete the sliding and installation in place of a steel tower column, the steel beam and a steel box girder, effectively improve the construction efficiency and reduce the occupation time of a navigation channel.
It should be noted that the cable-stayed bridge constructed in the application adopts an H-shaped primary-secondary tower, the cable tower comprises two tower columns and three cross beams arranged between the tower columns, each tower column of the cable tower is divided into 30 sections, the lower cross beam is of a steel-concrete combined structure, the lower cross beam can be divided into 6 sections, the middle and upper cross beams are of steel structures, the middle cross beam is divided into 7 sections, and the upper cross beam is divided into 6 sections. In addition, the main beam of the cable-stayed bridge spans across a water channel and a flood control embankment.
Please refer to fig. 1 to 3, the present application utilizes the intelligent weight shifting device to transport the steel tower segment, the steel beam segment and the steel box girder segment to the site to be constructed, which facilitates the construction. The intelligent weight shifting device comprises a sliding support 1, a sliding trolley 2 and a traction mechanism for drawing the sliding trolley 2 to move along the sliding support 1, wherein the sliding support 1 comprises an underwater sliding support 111 and a land sliding support 121 which are connected, and the main bridge of the cable-stayed bridge of the embodiment spans a water channel and a flood control levee, the arrangement of the underwater sliding support 111 can reduce the occupation of a bridge construction member on the channel and the influence on the river levee and the original landform during ship unloading, and meanwhile, the transportation speed and the efficiency of the bridge construction member can be improved.
The underwater sliding support 111 extends along the bridge direction and comprises a slideway steel pipe pile 111 inserted into water and a first slideway beam 112, wherein the slideway steel pipe pile 111 is provided with a plurality of steel pipe piles which are arranged along a preset path of the first slideway beam 112. Meanwhile, in this embodiment, two sets of slideway steel pipe piles 111 and first slideway beams 112 are arranged along the bridge-following direction, two rows of the slideway steel pipe piles 111 are arranged in each set, slideway bearing beams 113 which are connected in a one-to-one correspondence are arranged at the tops of the two rows of the slideway steel pipe piles 111 in each set, and the first slideway beams 112 are arranged on the slideway bearing beams 113, so that the load transported on the first slideway beams 112 is distributed to the two slideway steel pipe piles 111 connected with the slideway bearing beams 113 through the slideway bearing beams 113.
Specifically, for the transportation of the steel tower segment and the steel beam segment, two rows of first slideway beams 112 are arranged in each group of the embodiment, and the first slideway beams 112 support the steel tower segment and the steel beam segment, so that the normal transportation of the steel tower segment and the steel beam segment can be ensured, and the two groups of first slideway beams 112 can be transported synchronously. And to the longer steel box girder segment section of length, every group first slide roof beam 112 can set up one row, utilizes two sets of single row first slide roof beam 112 supports in order to carry the both ends of steel box girder, satisfies the transportation of the longer steel box girder segment section of length when can reducing shaped steel use. The different combination modes of the slide way beams in the intelligent weight shifting device can be selected by construction workers according to the length of the bridge construction member to be transported, and the construction applicability is high.
Preferably, the steel pipe pile of the present application employs
The length of the single steel pipe is 12m, the steel pipe can be processed by pile extension or cutting at the position of the steel pipe pile which does not meet the standard height, and the steel pipe pile is vibrated by adopting a DZ135 vibration pile.
In the waterWhen the sliding support 111 is erected, a trestle (not shown in the figure) can be constructed between the two groups of preset paths of the steel pipe piles, so that the sliding support 111 in water can be constructed conveniently. The width of the trestle of the embodiment is set to 9m, adopting
The steel pipe as steel-pipe pile, just three rows of steel-pipe piles are arranged to the landing stage along the horizontal bridge to three rows, and three rows the horizontal interval of steel-pipe pile is 3m, and the longitudinal separation distance of two adjacent steel-pipe piles of every row of steel-pipe pile is 7 m. Meanwhile, two adjacent steel pipe piles adopt
The steel pipes are connected in parallel, a trestle pile top bearing beam and a trestle longitudinal bearing beam are arranged on the pile top of the steel pipe pile, the trestle pile top bearing beam and the trestle longitudinal bearing beam are both located on I145a section steel, then I122a section steel is arranged on the trestle longitudinal bearing beam to serve as distribution quantity, and finally a pattern steel plate of 1cm is laid. The trestle of the embodiment is also constructed by adopting an 'angling method', wherein the angling method is an operation method that hoisting equipment such as a crawler crane is matched with a vibration hammer to vibrate and sink the pile, and the hoisting equipment is simultaneously provided with a pile upper structure so as to carry out construction from the bank to the water step by step. The constructed trestle can be used as a construction platform for erecting a slideway steel pipe pile 111 of an underwater sliding support 111 and laying a slideway beam, when the trestle is used for constructing the underwater sliding support 111, firstly, two rows of slideway steel pipe piles 111 close to a embankment and arranged along a transverse bridge direction are inserted and driven by adopting a crawler crane on the trestle, a track beam is laid, then, the construction of the underwater sliding support 111 is carried out from the embankment to water according to the step of constructing the two rows of slideway steel pipe piles 111 arranged along the transverse bridge direction each time, and the track beam constructed each time is butted. The construction of the two sets of slide steel pipe piles 111 of the underwater sliding support 111 can be performed separately or synchronously.
In order to ensure the vibration of the slideway steel pipe pile 111 to set the downward verticality, a steel pipe pile vibration guide frame (not shown in the figure) can be processed and assisted when the slideway steel pipe pile 111 is inserted and driven, the slideway bearing beam 113 can be placed in alignment with the slideway steel pipe pile 111, and then the normal stress of the slideway bearing beam 113 and the slideway steel pipe pile 111 is ensured when a bridge construction member is transported.
The land sliding support 121 comprises an enlarged foundation 121 and a plurality of second slideway beams 122, the enlarged foundation 121 is arranged along a preset path of the second slideway beams 122, the enlarged foundation 121 and the second slideway beams 122 are arranged in two groups corresponding to the slideway steel pipe piles 111 and the first slideway beams 112 of the underwater sliding support 111, and the rows of the second slideway beams 122 are connected with the first slideway beams 112 in a one-to-one correspondence manner, so that bridge construction members transported by the underwater sliding support 111 are transported to a cable tower or a steel box beam joint through the land sliding support 121 for installation.
The enlarged foundation 121 of the land sliding support 121 is a C30 enlarged foundation, the enlarged foundation 121 is reinforced according to the structure, a steel plate is embedded in the top of the enlarged foundation 121, the embedding of the steel plate can enhance the structural strength of the enlarged foundation 121, I45a type steel extending along the transverse bridge direction is paved on the enlarged foundation 121 to serve as a foundation bearing beam 123, and the foundation bearing beam 123 is welded with the steel plate embedded in the enlarged foundation 121. The second slideway beam 122 is disposed on the basic bearing beam 123, and in this embodiment, HN900 × 300 section steel is preferably used as the second slideway beam 122.
Please refer to fig. 4, since the sliding support 1 of the present application needs to extend from the bank to the water, that is, the sliding support 1 needs to cross the river bank, the embankment staggered track arrangement structure 13 at the crossing position of the sliding support 1 on the river bank can prevent the track from occupying the road, and ensure the normal traffic.
The embankment staggered track arrangement structure 13 comprises a concrete structure 131 poured on an original river levee, a groove extending along the bridge direction is formed in the concrete structure 131, a sliding groove beam is embedded in the groove of the concrete structure 131, a sliding rail beam is higher than the original road surface, the top surface of the concrete structure 131 is flush with the top surface of the sliding rail beam, and collision between vehicles and the sliding rail beam when the vehicles pass through the concrete structure 131 is avoided. Slopes are poured on two end sides of the concrete structure 131 along the river dike direction, the slope of each slope is 1%, and vehicles can conveniently pass through the concrete structure 131 due to the arrangement of the slopes.
Preferably, the present embodiment uses C30 concrete to cast the concrete structure 131 and the steel bars are placed inside, so as to ensure sufficient load bearing capacity of the embankment staggered track arrangement 13.
When the intelligent weight shifting device is not needed to be used for transporting the bridge construction member, the steel plate can be adopted to cover the slide way beam, so that the vehicle can pass conveniently, and the slide way beam can be protected.
When the intelligent weight shifting device is used for transporting bridge construction members, the sliding trolley 2 and the traction device are arranged on the sliding support 1. The dolly 2 that slides of this application adopts crawler-type transport tanky, dolly 2 and the cooperation of slide roof beam slide, the drive mechanism of this application adopt the hoist engine, for guaranteeing to pull balanced the distolateral of two sets of slide roof beams of land support 121 that slides respectively sets up a traction point to supporting fixed pulley, movable pulley and wire rope are selected according to the tonnage of hoist engine. When the sliding mechanism is used for transporting bridge structures, a steel tower segment, a steel beam segment and a steel box girder segment can be transported to the site by a barge, a floating crane is used for unloading and hoisting the steel tower segment, the steel beam segment and the steel box girder segment to the sliding trolley 2 of the sliding support 1, a steel wire rope of the traction mechanism is connected with the sliding trolley 2 of the bridge structures for transportation at two points so as to pull the sliding trolley 2 to slide along the sliding support 1, and the friction between the bridge structures and the sliding support 1 is reduced due to the arrangement of the sliding trolley 2.
Specifically, the sliding construction steps of the steel tower segment or the steel beam segment with shorter transportation length are as follows:
firstly, steel tower segment or steel crossbeam segment are unloaded the ship and are supported on slip support 1, and steel tower segment or steel crossbeam segment can adopt four 150t crawler-type transport tankers to carry out four-point support and transportation, and the position of four crawler-type transport tankers can be adjusted according to the size of the festival section of steel tower segment or steel crossbeam, and the same direction of bridge central line of crawler-type transport tankers coincides or basic coincidence with orbital central line that slides. In addition, in order to improve the transportation of the steel tower sections or the steel beam sections, transportation platforms are arranged on four crawler-type transportation tankers to convert point support into surface support and ensure the stability of transportation of bridge construction members, and the transportation platforms and the sliding trolley 2 are in a separable state.
Subsequently, the pulling device is installed. The winch is arranged on the end side of the sliding support 1, the lug plate and the pin shaft are welded on the transportation platform, the steel wire rope of the winch is buckled on the pin shaft through a shackle, and the transportation platform is pulled by the winch to drive the steel tower segment or the steel beam segment to slide.
And then, starting the winch to gradually tighten the steel wire rope so as to draw the steel tower segment or the steel beam segment to slide to an accurate position for positioning and installation. In addition, because two towers of the cable tower are respectively arranged at two sides of the sliding support 1, the steel tower segment needs to correspondingly move to the lower part of the tower to be hoisted.
For the transverse sliding of the steel tower segment, the land sliding support 121 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 bridge direction, and includes the second sliding beam 122 butted with the first sliding beam 112 and the enlarged bases 121 arranged along the extending path of the second sliding beam 122, the transverse sliding mechanism is located at one side of the longitudinal sliding mechanism close to the cable tower, the transverse sliding mechanism is arranged along the transverse bridge direction and includes a third sliding beam 124 perpendicular to the second sliding beam 122, and the bottom of the third sliding beam 124 is also correspondingly provided with the enlarged bases 121 for supporting. The transverse sliding support 1 is provided with a transverse sliding trolley 2, the sliding trolley 2 on the longitudinal sliding support 1 is marked as a longitudinal sliding trolley 2, and the upper end side of the transverse sliding support 1 is provided with a winch connected with the transverse sliding trolley 2 so as to pull the transverse sliding trolley 2 loaded with the steel tower segments to slide to a steel tower hoisting position.
And a lifting mechanism (not shown) is arranged at the intersection of the transverse sliding support 1 and the longitudinal sliding support 1, the lifting mechanism is used for transferring the steel tower segment on the longitudinal sliding trolley to the transverse sliding trolley, and a hydraulic jack is preferably adopted as the lifting mechanism. And longitudinally moving the steel tower segment to the intersection of the longitudinal sliding support 1 and the transverse sliding support 1, jacking the support platform by means of a hydraulic jack to separate from the longitudinal sliding trolley, enabling the longitudinal sliding trolley to exit the intersection of the longitudinal sliding support 1 and the transverse sliding support 1, then installing a transverse sliding trolley at the intersection, and driving the hydraulic jack to drive the support platform and the steel tower segment to fall onto the transverse sliding trolley by using a crawler-type carrying tank and driving the transverse sliding trolley to transversely move to the steel tower hoisting position by using a winch.
And finally, after the steel tower segment or the steel beam segment slides in place, hoisting and installing by using a truck crane.
The construction steps of sliding the steel box girder sections with longer transport length are the same as the construction steps of transporting the bridge construction members with shorter transport length, the transportation of the steel box girder sections needs the synchronous operation of the sliding trolleys 2 on the two sets of slide rails, and the sliding trolleys 2 are provided with rubber pads to be in contact with the bottoms of the steel box girder sections, so that the friction force can be improved, and meanwhile, the abrasion to the steel box girder sections is avoided. Meanwhile, because the steel box girder segment has heavy weight, when the traction device is installed on the steel box girder segment, a counterforce seat needs to be installed on a bottom plate of the steel box girder, then a welding lug plate and a pin shaft are installed on the counterforce seat, and a winch is used for winding a steel wire rope so as to pull the steel box girder to slide to an installation position along the bridge direction.
Please combine fig. 5 and fig. 6, adopt intelligent heavy object shifter to transport steel tower segment section, steel crossbeam segment section and steel box girder segment section respectively to the construction department with waiting to install, wherein, the steel crossbeam segment section needs to be assembled and forms the steel crossbeam and install on the cable-stayed bridge steel crossbeam multifunctional support accomplishes assembling of steel crossbeam this application. The multifunctional support for the steel cross beam of the cable-stayed bridge comprises an assembling support 2 of a large-tonnage steel-concrete combined cross beam of a cable-stayed bridge pylon and an assembling sliding support 3 of the large-tonnage steel cross beam of the cable-stayed bridge pylon, wherein the assembling support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge pylon is used for providing support for assembling a lower cross beam, the assembling sliding support 3 of the large-tonnage steel cross beam of the cable-stayed bridge pylon is based on the assembling support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge pylon and is built above the assembling support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge pylon, and the assembling sliding support 3 of the large-tonnage steel cross beam of the cable-stayed bridge pylon is used for providing support for assembling a middle cross beam and an upper cross beam.
Specifically, support 2 of assembling of cable-stay bridge cable-stayed tower large-tonnage steel-concrete combination crossbeam includes to arranging many support steel-pipe piles between two pylons of arranging in the cable-stayed tower along the cross bridge, support steel-pipe pile sets up two rows to at least along the longitudinal bridge, every row the top of support steel-pipe pile is equipped with along the cross bridge to the support pile bolck spandrel girder 22 that extends. Each row of the support steel pipe piles comprise sliding track piles 211 and bearing steel pipe piles 212, a sliding track beam 23 erected on a support pile top bearing beam 22 is arranged between the sliding track piles 211 of the adjacent two rows of the support steel pipe piles, the sliding track beam 23 extends along the bridge direction, the sliding track beam 23 is in butt joint with an intelligent weight shifting device, and therefore steel beam sections can be transferred to the splicing support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower through the sliding track beam 23 by the intelligent weight shifting device. And a support longitudinal bearing beam 24 erected on the support pile top bearing beam 22 is also arranged between the support pile top bearing beams 22 of the two adjacent rows of support steel pipe piles, and the support longitudinal bearing beam 24 extends along the bridge direction and is arranged in one-to-one correspondence with the support steel pipe piles of each row.
In addition, each row of the support steel pipe piles is provided with two groups of sliding track piles 211, and the two groups of sliding track piles 211 are arranged in a manner of central symmetry of two tower columns of the cable tower. 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 4 sliding track piles 211 are divided into two groups; the rest 8 support steel pipe piles are used as the bearing steel pipe piles 212, the 8 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 of the two groups of sliding track piles 211 at intervals, and 4 bearing steel pipe piles 212 arranged between the two groups of sliding track piles 211 are arranged.
The sliding track beam 23 is also arranged corresponding to each row of sliding track piles 211 one by one, the sliding track beam 23 and the support pile top bearing beam 22 are provided with inclined struts 25, the inclined struts 25 can prevent the sliding track beam 23 from shaking left and right and play a role of preventing the inclined struts, and the stability of the sliding track beam 23 when the steel cross beam is transferred to the splicing support 2 of the cable-stayed bridge tower large-tonnage steel-concrete combined cross beam is ensured.
The support is characterized in that a lower cross beam temporary buttress 26 used for supporting a steel cross beam is arranged on the longitudinal bearing beam 24 of the support, a lower cross beam three-way jack (not shown in the figure) is arranged between the lower cross beam temporary buttress 26 and the longitudinal bearing beam 24 of the support, the lower cross beam three-way jack can realize the adjustment in the front-back direction, the left-right direction and the up-down direction, and the adjustment of the position of the steel cross beam can be achieved through the position of the lower cross beam three-way jack.
Furthermore, a plurality of the lower beam temporary buttresses 26 are arranged along the length direction of the support longitudinal bearing beam 24, and the plurality of the lower beam temporary buttresses 26 are uniformly distributed on the support longitudinal bearing beam 24. Each longitudinal support beam 24 of the support is provided with a plurality of lower beam temporary buttresses 26 which can support steel beams on the splicing support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge tower at multiple points, and can adjust the steel beams at multiple points, so that the adjustability and the support stability of the positions of the steel beams are improved.
Preferably, all the support steel pipe piles of the splicing support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge pylon of the embodiment adopt the support steel pipe piles
The support pile top bearing beam 22 adopts I45a steel section, and the supportThe longitudinal bearing beam 24 is also preferably made of I45a steel. In addition, the support steel-pipe pile of this embodiment is provided with two rows along following the bridge direction, and two rows the interval of support steel-pipe pile is 9 m.
In addition, the bottom of the splicing support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower is provided with a support expanding foundation 27, and the support expanding foundation 27 comprises a concrete pouring piece buried in a base. When the support enlarged foundation 27 is constructed, the earth in the foundation area to be enlarged is excavated by the excavator, and the foundation is compacted by replacement so as to ensure that the bearing capacity of the foundation meets the design requirements. Then, pre-embedded steel bars are installed at the foundation where the earth is excavated, concrete is poured to complete the construction of the support enlarged foundation 27, then the construction of the steel pipe pile is performed on the support enlarged foundation 27, and the steel pipe pile and the pre-embedded steel bars in the support enlarged foundation 27 are welded and fixed.
Meanwhile, in order to facilitate the transportation of the steel pipe piles, the steel pipe piles are processed into 12 m/section standard sections, the steel pipe pile standard sections are transported to a construction site and then spliced, and when 1m of height remains at the pile top of the bottom section during pile splicing, another steel pipe pile standard section is hoisted for lengthening.
Secondly, the support 3 that slides of assembling of cable-stay bridge cable-tower large-tonnage steel crossbeam of this application is in cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam assemble on the support 2, its with cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam assemble support 2 as the basis, well middle and upper crossbeam includes along following the bridge to two row at least supporting steel-pipe piles 31 that set up, just supporting steel-pipe piles 31 the row number with cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam assemble support steel-pipe piles of support 2's row number corresponds every row supporting steel-pipe piles 31 is including many supporting steel-pipe piles 31 along the transverse bridge to the range. The top of the supporting steel pipe pile 31 is sequentially provided with a supporting pile top bearing beam 32, a bailey bearing beam 33 and a distribution beam 34 from bottom to top, wherein the supporting pile top bearing beam 32 extends along the bridge direction and is connected with two adjacent rows of supporting steel pipe piles 31, and the supporting pile top bearing beams 32 correspond to the plurality of supporting steel pipe piles 31 in each row one by one. Bailey spandrel girder 33 extends and erects in many along the cross bridge supporting pile bolck 32, and Bailey spandrel girder 33 of this application adopts Bailey frame standard festival to assemble and forms, convenient transportation and dismouting, and Bailey frame has good structural rigidity, durability and life. The distribution beams 34 extend along the longitudinal bridge direction and are provided with a plurality of beams, and the distribution beams 34 are laid above the bailey frames along the transverse bridge direction.
Preferably, the supporting steel pipe pile 31 in the present embodiment is preferably adopted
Four supporting steel pipe piles 31 are arranged in each row, the distance between every 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 in parallel through steel pipes (not marked in the figure) along the transverse bridge direction. Meanwhile, it is known that the splicing support 2 of the cable-stayed bridge pylon large-tonnage steel-concrete combined beam of the embodiment is provided with two rows of steel pipe piles, so that the number of the support steel pipe piles 31 of the embodiment corresponding to 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 links (not marked in the figure) extending along the bridge direction, the steel pipe parallel links are arranged corresponding to the support steel pipe piles 31 of each row one by one, and the two adjacent steel pipe parallel links connected to each row and the two adjacent rows of steel pipe parallel links connected to each other are all adopted
The steel pipe of (3). In addition, the supporting pile top bearing beam 32 is preferably made of HN 900X 300 section steel, and the distribution beam 34 is preferably made of I22 section steel.
Every be equipped with a plurality of interim buttresses 35, and a plurality of along its length direction on the distribution beam 34 interim buttresses 35 is followed the length direction of distribution beam 34 evenly arranges, through interim buttresses 35 to place in the steel crossbeam on cable-stay bridge pylon large-tonnage steel crossbeam assembles sliding support 3 carries out the multiple spot and supports, simultaneously interim buttress 35 bottom with be equipped with the three-dimensional jack between the distribution beam 34, then can carry out the multiple spot to the steel crossbeam and adjust the plane position of steel crossbeam section then.
In conclusion, the multifunctional support for the steel cross beams 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 assembling support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge tower is adopted to assemble the lower cross beam, after the lower cross beam is assembled, the assembling sliding support 3 for the large-tonnage steel cross beam of the cable-stayed bridge tower is built on the basis of the assembling support 2 for the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge tower, and then the assembling of the middle cross beam and the upper cross beam is completed through the assembling sliding support 3 for the large-tonnage steel cross beam of the cable-stayed bridge tower.
Therefore, the assembly of the steel beam by adopting the multifunctional bracket for the steel beam of the cable-stayed bridge specifically comprises the following steps:
firstly, hoisting the steel crossbeam segment to the multifunctional bracket of the steel crossbeam of the cable-stayed bridge.
And secondly, assembling and welding the steel cross beam from the middle of the steel cross beam to two ends one by one to finish the installation of the steel cross beam.
Specifically, when the lower cross beam is assembled, a steel cross beam segment positioned in the middle of the lower cross beam is hoisted to the assembling support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower by using a truck crane, and the position of the steel cross beam segment is adjusted to ensure that the center line of the steel cross beam along the transverse bridge direction is coincident or approximately coincident with the center line of the steel tower. And hoisting the steel beam segment close to the first steel beam segment to the assembling support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower, wherein the steel beam segment is supported on the temporary buttress 35 of the assembling support 2 of 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 elevation of the steel beam segment placed on the temporary buttress 35 and enable the steel beam segment to be accurately butted with the first steel beam segment. And temporarily fixing the two steel beam sections by adopting a welding horse plate, and then carrying out layered welding on joints of the two steel beam sections and carrying out welding seam detection.
And then, respectively hoisting the steel crossbeam sections on two sides of the two welded steel crossbeam sections to an assembling support 2 of the large-tonnage steel-concrete combined crossbeam of the cable-stayed bridge tower, wherein the two steel crossbeam sections can be respectively marked as a section III and a section IV. The weight of section three and section four in this embodiment is great, then through the rail beam 23 that slides of assembling support 2 with the cable-stay bridge cable-tower large-tonnage steel-concrete composite crossbeam of intelligent heavy object displacement device butt joint, transport the steel crossbeam section to the support 2 of assembling of cable-stay bridge cable-tower large-tonnage steel-concrete composite crossbeam, adjust the plane position and the elevation of section three and section four through the three-dimensional jack simultaneously, make both respectively with assemble two accurate butt joints in steel crossbeam section both sides of accomplishing, and adopt the welding horse board range do not with section three and section four temporary fixation, again with joint layer welding and welding seam detection.
And then, hoisting the steel beam sections on the intelligent weight shifting device by using a truck crane to be placed on two sides of the assembled steel beam, repeating the steps, adjusting the plane position and the elevation of the steel beam sections subsequently hoisted to the assembling support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge tower by using a three-way jack, accurately butting the steel beam sections to be assembled with the assembled steel beam sections, and finally welding to complete the assembling of the lower beam.
After the lower cross beam is assembled, assembling sliding supports 3 of the large-tonnage steel cross beam of the cable-stayed bridge cable tower are assembled on the basis of the assembling supports 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower so as to assemble the middle cross beam and the upper cross beam. When well crossbeam or entablature are assembled, all adopt truck-mounted hoist and mount intelligent heavy object shifter to transport the steel crossbeam segment that comes to cable-stay bridge cable tower large-tonnage steel crossbeam assemble on the support 3 that slides, and assemble towards the order of both sides from the centre of steel crossbeam, all adjust the plane position and the elevation of steel crossbeam segment through the three-dimensional jack during assembling, make the steel crossbeam segment of both sides and the steel crossbeam segment accurate positioning of middle assembling, utilize the welding horse board to the steel crossbeam segment after temporarily fixed, at last weld the joint layering welding of steel crossbeam segment and carry out the welding seam detection, can accomplish assembling of well crossbeam or entablature. And finally, hoisting the assembled middle cross beam and the assembled upper cross beam to the cable tower cross beam mounting position by using a lifting device for welding and fixing.
In addition, the steel beam sections are welded in a mode of connecting and welding the interface circular seams and the stiffening ribs, temporary fixing parts such as welding straps and the like are removed after main welding seams are bottomed and filled, the welding straps are removed twice, part of the welding straps are removed after bottoming is completed, the distance between the rest welding straps cannot exceed 1.5m, and the rest welding straps are removed after filling is completed. Temporary fixing parts such as welding straps and the like must be removed by adopting a flame cutting or carbon arc gouging method, the parent metal cannot be damaged, and strong dismantling is strictly forbidden so as to avoid tearing the parent metal.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (8)
1. The utility model provides a support of assembling of cable-stay bridge cable tower large-tonnage steel-concrete composite beam which characterized in that, includes along two row at least support steel-pipe piles that set up along the direction of the bridge, every row support steel-pipe pile arranges many along the direction of the bridge, and every row the top of support steel-pipe pile is equipped with along the support pile bolck that the direction of the bridge extends, every row support steel-pipe pile is including slip track pile and bearing steel-pipe pile, adjacent two rows be equipped with along extending and erectting along the direction of the bridge between the slip track pile of support steel-pipe pile the slip track roof spandrel top spandrel girder above the support pile spandrel girder, the slip track docks with the slip system, adjacent two rows be equipped with along extending and erectting along the direction of the bridge between the bearing steel-pipe pile of support steel-pipe pile vertical spandrel girder of support on the support pile spandrel girder.
2. The splicing support of the large-tonnage steel-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 longitudinal bearing beam of the support, and a lower beam three-way jack is arranged between the lower beam temporary buttress and the longitudinal bearing beam of the support.
3. The splicing support of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 2, characterized in that a plurality of the lower beam temporary buttresses are arranged along the length direction of the longitudinal bearing beam of the support, and the plurality of the lower beam temporary buttresses are uniformly distributed on the longitudinal bearing beam of the support.
4. The splicing support of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, wherein the support steel pipe piles in each row are provided with two groups of sliding track piles which are centrosymmetric with two tower columns of the cable tower, and the sliding track beams are provided with two groups corresponding to the sliding track piles.
5. The splicing support of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 1, wherein an inclined strut is arranged between the sliding track beam and the support pile top bearing beam.
6. The splicing support of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 1, wherein a support expansion foundation is arranged at the bottom of the support steel pipe pile, and the support expansion foundation comprises a concrete casting buried in a base.
7. The splicing support of a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, characterized in that the steel pipe piles of the support adopt
The steel pipe of (1).
8. The splicing support of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 1, wherein the distance between two adjacent rows of support steel pipe piles is 9 m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN114775432B (en) | 2024-04-19 |
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