CN114775431A

CN114775431A - Assembling and sliding support for large-tonnage steel cross beam of cable-stayed bridge cable tower

Info

Publication number: CN114775431A
Application number: CN202210388055.9A
Authority: CN
Inventors: 黄开开; 赖引明; 李铭; 郑登明; 罗森; 李泽民; 杨坤
Original assignee: Road and Bridge International Co Ltd; Road and Bridge South China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge South China Engineering Co Ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-07-22
Anticipated expiration: 2042-04-13

Abstract

The application provides a support that slides is assembled to cable-stay bridge cable-stayed tower large-tonnage steel crossbeam, locate cable-stay bridge cable-stayed tower large-tonnage steel-concrete combination crossbeam assemble on the support, it includes along two rows at least supporting steel-pipe piles that set up along the bridge to, every row of supporting steel-pipe pile includes many supporting steel-pipe piles of arranging along the cross bridge, the top of supporting steel-pipe pile is equipped with the supporting pile bolck spandrel girder that sets gradually from bottom to top, bailey spandrel girder and distribution roof beam, set up interim buttress on the distribution roof beam, and interim buttress bottom is equipped with the three-dimensional jack that is used for adjusting its position. The utility model provides a support that slides of assembling of cable-stay bridge cable-stay tower large-tonnage steel crossbeam carries out the leather clothing with the support of assembling of cable-stay bridge cable-stay tower large-tonnage steel-concrete combination crossbeam that is located its below as the basis, can be used to accomplish assembling construction of well crossbeam and entablature, need not to transport well crossbeam and entablature monoblock, reduces cost of transportation.

Description

Assembling and sliding support for large-tonnage steel cross beam of cable-stayed bridge cable tower

Technical Field

The application relates to the technical field of bridge construction, in particular to an assembling and sliding support for a large-tonnage steel cross beam of a cable-stayed bridge tower.

Background

The H-bridge tower is provided with a plurality of layers of cross beams, opposite surfaces of two tower columns of a main tower are vertical or tend to be vertical, and in the middle and upper cross beam pouring process of the traditional H-bridge tower, a middle tower column is generally poured firstly, a middle cross beam support is erected to finish the pouring of the middle cross beam, then the middle cross beam support is dismantled, the tower column is poured, a tower column upper cross beam support is erected to finish the pouring of the upper cross beam, and finally the upper cross beam support is dismantled. Although the method can effectively complete the pouring of the middle and upper cross beams of the bridge tower, the installation and the removal of the cross beam support both need two times, the process is complicated, and the labor and the time are wasted.

Disclosure of Invention

The utility model aims at providing a convenient to be under construction's cable-stay bridge cable tower large-tonnage steel crossbeam assemble support that slides.

In order to achieve the above object, the present application provides the following technical solutions:

the utility model provides a support that slides is assembled of cable-stay bridge cable tower large-tonnage steel crossbeam, locates on the support of assembling of cable-stay bridge cable tower large-tonnage steel-concrete combination crossbeam, include along two rows at least supporting steel-pipe piles that set up in the same direction as the bridge, every row supporting steel-pipe pile sets up many along the crossbridge, the top of supporting steel-pipe pile is equipped with supporting pile bolck spandrel girder, bailey spandrel girder and the distribution roof beam that sets gradually from bottom to top, set up the interim buttress that is used for supporting steel crossbeam segment section on the distribution roof beam, just interim buttress bottom with be equipped with between the distribution roof beam and be used for adjusting the three-dimensional jack of interim buttress position.

Further setting: the bearing beam of the supporting pile top extends along the bridge direction and is connected with the supporting steel pipe piles in two adjacent rows, and the bearing beam of the supporting pile top is provided with a plurality of bearing steel pipe piles corresponding to the plurality of the supporting steel pipe piles in each row one by one.

Further setting: the bearing beam of the supporting pile top adopts 2HN 900X 300 section steel.

Further setting: the bailey spandrel girder extends along the transverse bridge direction and is erected above the bearing girders of the top of the bearing piles.

Further setting: the distributing beam extends along the longitudinal bridge direction and is provided with a plurality of distributing beams, the distributing beams are paved above the Bailey bearing beam along the transverse bridge direction, and each distributing beam comprises an I-shaped steel.

Further setting: at least two temporary buttresses are arranged on each distribution beam along the length direction of the distribution beam, and the temporary buttresses on each distribution beam are uniformly arranged.

Further setting: the distance between two adjacent rows of the supporting steel pipe piles is 9m, and the two adjacent rows of the supporting steel pipe piles are connected in a parallel connection mode through steel pipes extending along the bridge direction.

Further setting: four supporting steel pipe piles are arranged in each row, the distance between every two adjacent supporting steel pipe piles in each row is 9m, and a steel pipe parallel connection extending along the transverse bridge direction is arranged between every two adjacent supporting steel pipe piles in each row.

Further setting: the steel pipe is connected in parallel

The steel pipe of (1).

Compared with the prior art, the scheme of the application has the following advantages:

in the assembling and sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower, the assembling and sliding support of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower serves as a foundation of the assembling and sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower, the support is convenient to install and detach, the assembling and sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower has good bearing capacity, meanwhile, assembling and constructing of the middle cross beam and the upper cross beam are completed on the assembling and sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower, the middle cross beam and the upper cross beam do not need to be transported in one piece, and the transportation cost is reduced.

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. slideway steel pipe piles; 112. a first slideway beam; 113. a slideway spandrel girder; 114. a slideway inclined strut; 12. a land sliding support; 121. expanding the foundation; 122. a second slideway beam; 123. a foundation spandrel girder; 124. a third slideway beam; 13. an embankment 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 bracket longitudinal spandrel girder; 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 pile top bearing beam; 33. a bailey spandrel girder; 34. a distribution beam; 35. and (5) temporary buttresses.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and are not 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 a 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 beam, effectively improve the construction efficiency and reduce the occupation time of a channel.

It should be noted that, the cable-stayed bridge constructed in the present application adopts an H-shaped primary-secondary tower, the cable tower includes two towers and three cross beams disposed between the towers, each tower of the cable tower is divided into 30 sections, the lower cross beam is a steel-concrete composite structure, the lower cross beam can be divided into 6 sections, the middle and upper cross beams are both 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 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 heavy object shifting device comprises a sliding support 1, a sliding trolley 2 and a traction mechanism for drawing the sliding trolley 2 along the sliding support 1, wherein the sliding support 1 comprises a water 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 water sliding support 111 can reduce the occupation of a navigation channel and the influence on a river bank and the original landform during the ship unloading of a bridge construction member, 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 and is 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 segments and the steel beam segments, two rows of first slideway beams 112 are arranged in each group of the first slideway beams 112 in this embodiment, and the steel tower segments and the steel beam segments are supported by the two rows of first slideway beams 112, so that the normal transportation of the steel tower segments and the steel beam segments 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 through pile extension or cutting at the position of the steel pipe pile which does not meet the standard height, and the DZ135 vibration pile is adopted to vibrate the steel pipe pile.

When the underwater sliding support 111 is erected, a trestle (not shown) can be constructed between the preset paths of the two groups of steel pipe piles, so that the underwater sliding support 111 can be constructed conveniently. Trestle bridge of the embodiment is wideDegree is set to 9m, adopt

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 in 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 a fishing method, wherein the fishing 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 building the slideway steel pipe piles 111 of the underwater sliding support 111 and laying the slideway beams, when the trestle is used for constructing the underwater sliding support 111, firstly, two rows of slideway steel pipe piles 111 close to the embankment and arranged along the transverse bridge direction are inserted and driven on the trestle by adopting a crawler crane, the track beams are laid, then, the construction of the underwater sliding support 111 is carried out from the embankment to the water according to the step of constructing two rows of slideway steel pipe piles 111 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 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 a plurality of enlarged foundations 121 and second slideway beams 122, the enlarged foundations 121 are arranged along a preset path of the second slideway beams 122, the enlarged foundations 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 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 adopts 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 basic bearing beam 123, and the basic bearing beam 123 is welded with the steel plate embedded in the enlarged foundation 121. The second slideway beam 122 is arranged on the basic bearing beam 123, and in this embodiment, HN900 × 300 section steel is preferably adopted as the second slideway beam 122.

Inclined struts 25 are arranged between the first slideway beam 112 and a slideway bearing beam 113 connected with the first slideway beam and between the second slideway beam 122 and a basic bearing beam 123 connected with the second slideway beam, the inclined struts 25 are respectively arranged on two sides of the slideway beam and welded and fixed with the corresponding bearing beams, in the embodiment, I14 steel is preferably adopted as the inclined struts 25, 36# channel steel can be laid in the slideway beam as a sliding groove and a guiding device, and 16Mn steel with the thickness of 2cm is laid in the sliding groove as a contact surface of the sliding trolley 2. The 16Mn steel has good comprehensive mechanical properties, the 16Mn contains manganese, the yield strength of the steel can be improved by 50 percent, the atmospheric corrosion resistance is improved by about 20 to 38 percent, and the low-temperature impact toughness is better than that of the A3 steel.

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 utility model provides a dolly 2 that slides adopts crawler-type transport tanky, dolly 2 and the cooperation of slide roof beam of sliding, the drive mechanism of this application adopt the hoist engine, for guaranteeing to pull the balance the distolateral of two sets of slide roof beams of the support 121 that slides on land respectively sets up a pull 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, a steel tower section or a steel beam section is supported on a sliding support 1 in a ship unloading mode, four 150t crawler-type carrying tankers can be adopted to carry out four-point supporting and transportation, the positions of the four crawler-type carrying tankers can be adjusted according to the size of the sections of the steel tower section or the steel beam, and the center line of the crawler-type carrying tankers in the bridge direction coincides with or basically coincides with the center line of a sliding track. 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 welding lug plate and the pin shaft are arranged 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 pylons of cable tower are located the both sides of sliding support 1 respectively, the steel tower segment section needs the corresponding sideslip to pylon below in order to hoist.

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 sections 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, lifting the supporting 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 supporting platform and the steel tower segment to fall onto the transverse sliding trolley by using a crawler-type carrying small tank and transversely moving the steel tower segment to the hoisting position of the steel tower 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 refer to fig. 5 and 6, the intelligent weight shifting device is adopted to transport the steel tower segment, the steel beam segment and the steel box beam segment to the construction site to be installed, wherein the steel beam segment is assembled to form the steel beam and then installed on the cable tower. The multifunctional support for the steel cross beams of the cable-stayed bridge comprises an assembling support 2 of a cable-stayed bridge cable tower large-tonnage steel-concrete combined cross beam and an assembling sliding support 3 of the cable-stayed bridge cable tower large-tonnage steel cross beam, wherein the assembling sliding support 2 of the cable-stayed bridge cable tower large-tonnage steel-concrete combined cross beam is used for providing support for assembling a lower cross beam, the assembling sliding support 3 of the cable-stayed bridge cable tower large-tonnage steel cross beam is used for taking the assembling support 2 of the cable-stayed bridge cable tower large-tonnage steel-concrete combined cross beam as a base and building the assembling support 2 above the cable-stayed bridge cable tower large-tonnage steel-concrete combined cross beam, and the assembling sliding support 3 of the cable-stayed bridge cable tower large-tonnage steel cross beam 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 slippage track piles 211, and the 4 slippage track piles 211 are divided into two groups; the remaining 8 support steel pipe piles are used as 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 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 for supporting a steel cross beam is arranged on the support longitudinal bearing beam 24, a lower cross beam three-way jack (not shown in the figure) is arranged between the lower cross beam temporary buttress 26 and the support longitudinal bearing beam 24, the lower cross beam three-way jack can realize adjustment in the front-back direction, the left-right direction and the up-down direction, and the purpose of adjusting 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. Every it can play the multiple spot to support to set up the interim pier 26 of a plurality of bottom crossbeams on the vertical spandrel girder 24 of support can be to placing in the steel crossbeam on assembling support 2 of cable-stay bridge cable-tower large-tonnage steel reinforced concrete combination crossbeam to can play multiple spot position control to the steel crossbeam, improve the adjustability and the support stability in steel crossbeam position.

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 is made of I45a steel, and the support 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 cable-stayed bridge cable tower large-tonnage steel-concrete combined cross beam is provided with a support expanding foundation 27, and the support expanding foundation 27 comprises a concrete pouring piece embedded in a foundation. 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, embedded steel bars are installed at the foundation where the earth is excavated and 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 is welded and fixed with the embedded steel bars in the support enlarged foundation 27.

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 on the support 2 of assembling of cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam, its with the support 2 of assembling of cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam is the basis, well middle and upper crossbeam includes along two row at least supporting steel-pipe piles 31 of setting up in the same direction as the bridge, just the row number of supporting steel-pipe piles 31 with the row number of the support steel-pipe piles of assembling support 2 of cable-stay bridge cable-tower large-tonnage steel-concrete combination crossbeam corresponds, every row supporting steel-pipe pile 31 is including many supporting steel-pipe piles 31 to the range along the horizontal bridge. 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-following direction and is connected with two adjacent rows of supporting steel pipe piles 31, and a plurality of supporting steel pipe piles 31 are arranged in each row corresponding to the supporting pile top bearing beams 32 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 through steel pipes in a parallel connection (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 support 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 (1). 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 beam segment to the multifunctional bracket of the steel beam 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 complete the installation of the steel cross beam.

Specifically, when the lower cross beam is assembled, a steel cross beam segment 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 tower by using a truck crane, and the position of the steel cross beam segment is adjusted to ensure that the central line of the steel cross beam along the transverse bridge direction is coincident or approximately coincident with the central line of the steel tower. And hoisting the steel beam section close to the first steel beam section to the assembling support 2 of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower, wherein the steel beam section is supported on a temporary buttress 35 of the assembling support 2 of the large-tonnage steel-concrete combined cross 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 section placed on the temporary buttress 35 and enable the steel beam section to be accurately butted with the first steel beam section. 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 beam sections on two sides of the two welded steel beam sections to an assembling support 2 of the large-tonnage steel-concrete combined beam of the cable-stayed bridge tower, wherein the two steel beam 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, the assembling sliding support 3 of the large-tonnage steel cross beam of the cable-stayed bridge cable tower is assembled on the basis of the assembling support 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 middle cross beam or entablature are assembled, all adopt the intelligent heavy object shifter of truck crane hoist and mount to transport the steel crossbeam segment that comes to cable-stay bridge 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 three-dimensional jack during assembling, make the steel crossbeam segment of both sides and the steel crossbeam segment accurate positioning that has been assembled in the centre, utilize the welding horse board to the steel crossbeam segment after temporarily fixing, at last with the joint layering welding of steel crossbeam segment and carry out the welding seam detection, can accomplish assembling of middle cross beam or entablature. And finally, hoisting the assembled middle cross beam and the assembled upper cross beam to a 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 pieces 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 few embodiments of the present application and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present application, and that these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. The utility model provides a support that slides of assembling of cable-stay bridge cable-stayed tower large-tonnage steel crossbeam, locates on cable-stayed bridge cable-stayed tower large-tonnage steel-concrete combination crossbeam's the support of assembling, characterized by: include along two rows at least supporting steel-pipe piles that set up along the direction of the bridge, every row supporting steel-pipe pile sets up many along the cross bridge, supporting pile bolck spandrel girder, bailey spandrel girder and distribution roof beam are set gradually from bottom to top in the top of supporting steel-pipe pile, set up the interim buttress that is used for supporting steel crossbeam festival section on the distribution roof beam, just interim buttress bottom with be equipped with between the distribution roof beam and be used for adjusting the three-way jack of interim buttress position.

2. The splicing and sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 1, which is characterized in that: the bearing beam at the top of the supporting pile extends along the bridge direction and is connected with two adjacent rows of supporting steel pipe piles, and the bearing beam at the top of the supporting pile is provided with a plurality of supporting steel pipe piles corresponding to the plurality of supporting steel pipe piles in each row one by one.

3. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 2, which is characterized in that: the bearing beam of the top of the supporting pile adopts 2HN 900X 300 section steel.

4. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 2, which is characterized in that: the bailey spandrel girder extends along the transverse bridge direction and is erected above the bearing girders of the top of the bearing piles.

5. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 4, which is characterized in that: the distributing beam extends along the longitudinal bridge direction and is provided with a plurality of distributing beams, the distributing beams are paved above the Bailey bearing beam along the transverse bridge direction, and each distributing beam comprises an I-shaped steel.

6. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 5, which is characterized in that: at least two temporary buttresses are arranged on each distribution beam along the length direction of the distribution beam, and the temporary buttresses on each distribution beam are uniformly arranged.

7. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 1, which is characterized in that: the distance between two adjacent rows of the supporting steel pipe piles is 9m, and the two adjacent rows of the supporting steel pipe piles are connected in a parallel connection mode through steel pipes extending along the bridge direction.

8. The splicing sliding support of the large-tonnage steel cross beam of the cable-stayed bridge cable tower according to claim 1, which is characterized in that: four supporting steel pipe piles are arranged in each row, the distance between every two adjacent supporting steel pipe piles in each row is 9m, and a steel pipe parallel connection extending along the transverse bridge direction is arranged between every two adjacent supporting steel pipe piles in each row.

9. The splicing sliding support of large-tonnage steel cross beams of cable-stayed bridge cable tower according to claim 7 or 8, characterized in that the steel pipes are connected in parallel by adopting

The steel pipe of (3).