CN217536681U - Assembling support of large-tonnage steel-concrete combined cross beam of cable-stayed bridge cable tower - Google Patents

Abstract

The application provides a support of assembling of cable-stay bridge cable tower large-tonnage steel-concrete combination crossbeam, it includes along two rows at least support steel-pipe piles that set up along the direction of the bridge, every row of support steel-pipe piles has arranged many along the direction of the cross-bridge, every row of support steel-pipe piles's top is equipped with support pile top spandrel girder, every row of support steel-pipe piles is including sliding track pile and bearing steel-pipe pile, be equipped with the rail beam that slides that erects on support pile top spandrel girder between adjacent two rows of support steel-pipe piles's the rail pile that slides, the track that slides docks with the system that slides, be equipped with the vertical spandrel girder of support of erectting on support pile top spandrel girder between adjacent two rows of support steel-pipe piles's the bearing steel-pipe pile, support pile bottom sets up support expansion basis. 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

Assembling support of large-tonnage steel-concrete combined 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 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, vertical supporting force is provided for the main bridge and the approach bridge, and the tower columns on two sides of the bridge tower limit the movement of the main bridge and the approach bridge in the horizontal direction. In the correlation technique, the two opposite sides of two tower bodies are provided with the bracket respectively, and the bottom end rail is located the bracket top, when erectting the bottom end rail, generally need erect bottom end rail support system earlier, and bottom end rail support system includes that a plurality of intervals arrange as the steel-pipe pile of supporting role and be fixed in supporting beam etc. on steel-pipe pile top.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a build support of assembling of convenient and with low costs cable-stay bridge cable-stay tower large-tonnage steel-concrete combination crossbeam.

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

the spliced support comprises at least two rows of support steel pipe piles arranged along the bridge direction, a plurality of support steel pipe piles are arranged along the bridge direction in each row, support pile top bearing beams extending along the bridge direction are arranged at the tops of the support steel pipe piles in each row, each row of support steel pipe piles comprises sliding track piles and bearing steel pipe piles, sliding track beams extending along the bridge direction and erected above the support pile top bearing beams are arranged between the sliding track piles of the two adjacent rows of support steel pipe piles, the sliding tracks are in butt joint with a sliding system, support longitudinal bearing beams extending along the bridge direction and erected on the support pile top bearing beams are arranged between the bearing steel pipe piles of the two adjacent rows of support steel pipe piles, a support expanding foundation is arranged at the bottom of each support steel pipe pile, each support expanding foundation comprises concrete cast parts embedded in a foundation, and the bottoms of the support steel pipe piles are connected with embedded steel bars of the concrete cast parts.

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 support pile top bearing beam.

Further setting: the support steel pipe pile adopts

The steel pipe of (1).

Further setting: the distance between two adjacent rows of support steel pipe piles is 9m.

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

in the assembly 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 transportation of the steel beam segments can be facilitated by adopting an assembling mode, 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 the use of the underwater sliding 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 slides in water; 111. slideway steel pipe piles; 112. a first slideway beam; 113. a slideway spandrel girder; 114. a slideway diagonal brace; 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. a sliding 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 a bracket; 3. assembling and sliding supports of large-tonnage steel cross beams of the 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 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 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 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 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 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 case roof beam segment 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 case roof beam, satisfies the transportation of the longer steel case roof beam segment 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.

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. The width of the trestle of the embodiment is set to 9m, adopting

The steel pipe as steel-pipe pile, and the landing stage is along horizontal bridge to arranging three rows of steel-pipe pile altogether, and three rows the horizontal interval of steel-pipe pile is 3m, and the longitudinal interval of two adjacent steel-pipe piles of every row of steel-pipe pile is 7m. Meanwhile, two adjacent steel pipe piles adopt

The steel pipe pile top is provided with a trestle pile top bearing beam and a trestle longitudinal bearing beam, the trestle pile top bearing beam and the trestle longitudinal bearing beam are both positioned on I145a section steel, then I122a section steel is arranged on the trestle longitudinal bearing beam as a 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 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 arranged along a transverse bridge close to a embankment are inserted and driven by adopting a crawler crane on the trestle, a track beam is laid, and then two rows of steel pipe piles are arranged along the transverse bridge direction according to each constructionThe step of the slipway steel pipe pile 111 arranged in the transverse bridge direction is to perform the construction of the underwater sliding support 111 from the bank into the water and butt-joint the track beams constructed each time. 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.

The inclined struts 25 are arranged between the first slide way beam 112 and the slide way bearing beam 113 connected with the first slide way beam and between the second slide way beam 122 and the basic bearing beam 123 connected with the second slide way beam, the inclined struts 25 are respectively arranged on two sides of the slide way beam and are welded and fixed with the corresponding bearing beams, I14-shaped steel is preferably adopted as the inclined struts 25 in the embodiment, meanwhile, 36# channel steel can be paved in the slide way beam to serve as a sliding groove and a guiding device, and 16Mn steel with the thickness of 2cm is paved in the sliding groove to serve as a contact surface of the sliding trolley 2. The 16Mn steel has good comprehensive mechanical property, 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 superior to 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 embankment road, a groove extending along the bridge direction is formed in the concrete structure 131, a sliding groove Liang Qianyu is formed 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 a vehicle and the sliding rail beam when the vehicle passes through the concrete structure 131 is avoided. The slope is poured to concrete structure 131 along the both ends side of river levee direction, and this slope is 1%, and the setting on slope can make things convenient for the vehicle to pass through concrete structure 131.

Preferably, the present embodiment uses C30 concrete to cast the concrete structure 131, and the reinforcing steel bars are arranged in the concrete structure, so as to ensure that the embankment staggered track arrangement 13 has sufficient load bearing capacity.

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. The sliding mechanism can transport a steel tower segment, a steel beam segment and a steel box girder segment to the site by adopting a barge when transporting bridge construction members, the steel tower segment, the steel beam segment and the steel box girder segment are unloaded by using a floating crane and are hoisted to the sliding trolley 2 of the sliding support 1, the steel wire rope of the traction mechanism is connected with the sliding trolley 2 of the bridge construction members for transportation at two points to pull the sliding trolley 2 to slide along the sliding support 1, and the friction between the bridge construction members 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 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 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, 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 a large weight, when the traction device is installed on the steel box girder segment, a counterforce seat needs to be installed on a steel box girder bottom plate, 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 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 212,8, the bearing steel pipe piles 212 are divided into three groups according to the distribution relation of 2, 4 and 2, the three groups of bearing steel pipe piles 212 are arranged between the two groups of sliding track piles 211 and on two sides 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 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. 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 section steel, and the support longitudinal bearing beam 24 is also preferably made of I45a section steel. In addition, the support steel-pipe pile of this embodiment is provided with two rows along following the bridge, and two rows the interval of support steel-pipe pile is 9m.

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 distribution 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 cable tower large-tonnage steel-concrete combined beam of the embodiment is provided with two rows of steel pipe piles, so that the number of the supporting steel pipe piles 31 of the embodiment corresponding to the rows of the support steel pipe piles is also provided with two rows, the distance between the two rows of the supporting steel pipe piles 31 is 9m, the two adjacent rows of the supporting 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 supporting 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 adopted by adopting the two steel pipe parallel links connected to each other and the two adjacent rows of steel pipe parallel links connected to each other

The steel pipe of (3). In addition, the supporting pile top bearing beam 32 preferably adopts HN 900X 300 section steel, and the distribution beam 34 preferably adoptsI22 type steel is selected.

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 finish 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 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 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 (3) and a section (4). In the embodiment, the sections (3) and (4) are heavier, the steel beam sections are transported to the splicing support 2 of the cable-stayed bridge cable tower large-tonnage steel-concrete combined beam through the sliding track beam 23 of the splicing support 2 of the cable-stayed bridge cable tower large-tonnage steel-concrete combined beam which is in butt joint with the intelligent weight shifting device, meanwhile, the plane positions and the elevations of the sections (3) and (4) are adjusted through three-way jacks, so that the sections are in accurate butt joint with two sides of the two spliced steel beam sections respectively, the sections (3) and the sections (4) are temporarily fixed respectively by adopting welding Ma Banfan, and then the joints are welded in a layered mode and weld detection is carried out.

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 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 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 (7)

1. The spliced support is characterized by comprising at least two rows of support steel pipe piles arranged along the bridge direction, wherein each row of support steel pipe piles is provided with a plurality of steel pipes arranged along the bridge direction, the top of each support steel pipe pile is provided with a support pile top bearing beam extending along the bridge direction, each row of support steel pipe piles comprises sliding track piles and bearing steel piles, every two adjacent rows of sliding track piles of the support steel pipe piles are provided with sliding track beams extending along the bridge direction and erected above the support pile top bearing beam, the sliding tracks are butted with a sliding system, every two adjacent rows of sliding track piles are provided with support longitudinal bearing beams extending along the bridge direction and erected on the support steel pipe pile top bearing beam, the bottom of each support steel pipe pile is provided with a support enlarged foundation, the support enlarged foundation comprises concrete cast parts embedded in a foundation, and the bottom of each support steel pipe pile is connected with embedded steel bars of the concrete cast parts.

2. The splicing support of the large-tonnage steel-concrete combined cross beam of the cable-stayed bridge cable tower according to claim 1, characterized in that a lower cross beam temporary buttress for supporting a 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.

3. The splicing support of the large-tonnage steel-concrete combined beam of the cable-stayed bridge cable tower according to claim 2, wherein a plurality of lower beam temporary buttresses are arranged along the length direction of the longitudinal bearing beam of the support, and the plurality of 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 a large-tonnage steel-concrete combined beam of a cable-stayed bridge cable tower according to claim 1, characterized in that a steel pipe with the diameter of 820 x 10mm is adopted as a steel pipe pile of the support.

7. 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 9m.

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