CN102220811A - Truss arching-erecting splicing method of extra-large-pan steel pipe - Google Patents
Truss arching-erecting splicing method of extra-large-pan steel pipe Download PDFInfo
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- CN102220811A CN102220811A CN 201110096537 CN201110096537A CN102220811A CN 102220811 A CN102220811 A CN 102220811A CN 201110096537 CN201110096537 CN 201110096537 CN 201110096537 A CN201110096537 A CN 201110096537A CN 102220811 A CN102220811 A CN 102220811A
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Abstract
The invention relates to the technical field of manufacture and installation of a steel structure, and discloses a truss arching-erecting splicing method of an extra-large-pan steel pipe, which comprises the following steps: manufacturing a turning jig frame and an erecting-splicing jig frame; transferring the sections to an erecting-splicing special field; erecting the sections to be spliced on the turning jig frame and fixing the sections temporarily; transferring the erected sections to the erecting-splicing jig frame for fixing and supporting and conducting erecting-splicing examination; and then horizontally conveying the sections which are erected and spliced. In the invention, an erect-splicing manufacturing technique is adopted initially in manufacturing of the truss arching steel structure of the extra-large-pan steel pipe, arch ribs of the steel pipe trusses spliced in the horizontally splicing field are arranged to be in a built bridge state, the position of a joint flange plate of arch ribs and the work site built bridge controlling parameter are adjusted, and as the erecting-splicing state is closer to the work site hoisting state, the steel pipe truss arch manufacturing accuracy is high, the built bridge linear shape is attractive, the truss arch erecting-splicing technique of the extra-large-pan steel pipe is accumulated, and reference is provided for the in-plant manufacturing of similar types of bridges.
Description
Technical field
The present invention relates to steel work manufacturing and mounting technique field.
Background technology
Steel pipe truss arch generally adopts the main arch rib assembling process manufacturing of crouching when the internal field general assembly is made.Main arch rib crouches, and to have manufacture difficulty little, with short production cycle for assembling process, advantage such as low on the processing cost; But its manufacturing state with become the bridge state not meet, when lifting in the building site can because under the deadweight around etc. reason cause that the main arch rib linear change is big, main arch flange closely connected bad and influence the overall appearance of steel pipe truss arch bridge.For large span steel pipe truss arch, stride that the footpath is big, reasons such as segmentation is many, sections is heavy, required precision height need adopt and found assembling process and adjust controlling parameter, it is linear to guarantee that the building site lifts into bridge.Upright assembling process does not also have concrete application in the manufacturing of large-span steel pipe trussed bridge steel work, need carry out concrete research.
Summary of the invention
Technical problem to be solved by this invention provides a kind of, it has and will make completion on the moulding bed of plane, be transported to the upright special-purpose place of piecing together through the assembly sections after the assay was approved that crouches, adopt gantry crane, flat car, steel pier, wire rope and special tooling equipment to piece together the good steel pipe truss arch rib of place assembly unit and place into the bridge state crouching, position and the building site of regulating arch rib joint flange dish become the bridge controlling parameter, because upright assembly state more approaches building site lifting state, steel pipe truss arch accuracy of manufacture height becomes the linear characteristics attractive in appearance of bridge.
For solving the problems of the technologies described above, the invention provides the upright assembling method of a kind of large span steel pipe truss arch, it is characterized in that, comprise the steps:
To the improvement of the technical scheme scheme be, in the step 2, adopt flat car will need the sections of assembly unit to be transported to upright the assembly before the special-purpose place, the web member of tackling the required support of sections to be assembled carries out strength check, just transport after meeting the requirements, the discontented podomere section traffic requirements of check result, in the following manner the sections web member is strengthened:
Adjust the sections Support Position, make flat car support web member as much as possible, interim shoulder pole girder is set on flat car, adopt interim the support to increase web member intensity, reduce the flat car speed of travel, after sections is transported to the special-purpose place of upright assembly, before the assembly unit, the sections parameter is rechecked, and the discovery off-gage phenomenon is in time proofreaied and correct.
Preferred version to technique scheme is, the described moulding bed that stands up comprises movable jig frame and fixing moulding bed,
When step 3 erects sections to be assembled on standing up moulding bed, movable jig frame is fixed on the fixedly relative position of moulding bed according to the last lower chord position of first sections to be assembled relation, with gantry crane first sections to be assembled on the flat car is fallen to being positioned at fixedly on the moulding bed and movable jig frame, at this moment, fixedly moulding bed supports the lower chord of first sections to be assembled, movable jig frame supports the upper chord of first sections to be assembled, fall behind the position, with gantry crane first sections to be assembled original place on fixing moulding bed is stood up and to erect, after standing up, with wire rope that first sections to be assembled is temporary fixed, the dismounting movable jig frame is connected with ground, winch to the correspondence position that next sections to be assembled uses with gantry crane, promptly first sections to be assembled is fixed on the fixedly relative position of moulding bed according to the last lower chord position relation of next sections to be assembled;
To technique scheme further preferably, described fixedly moulding bed and the described upright assembly moulding bed that stands up moulding bed is welded into a whole.
To technique scheme further preferably, the described fixedly moulding bed that stands up moulding bed comprises the fixedly fixing moulding bed of moulding bed and No. 2 No. 1, described No. 1 fixedly moulding bed and No. 2 fixedly moulding bed respectively comprise two groups, every group is formed by connecting by drop to the ground back head and the tail of at least three steel piers, each steel pier is provided with stone bolt, ground, steel pier position pre-embedded bolt, connect solid welding by steel plate between the steel pier head and the tail that each is droped to the ground in every group, No. 1 fixedly every group side of moulding bed also be provided with the fulcrum positioning seat, No. 1 fixedly moulding bed and No. 2 fixedly moulding bed the position according to No. 1 fixedly two groups of moulding bed be arranged at two ends respectively, the mode in the middle of No. 2 fixedly each group of moulding bed is arranged at move towards layout along sections lower chord structure to be assembled.
Beneficial effect of the present invention is:
1. the present invention is that encircleing in steel work manufacturing at the large span steel pipe truss upright assembly manufacturing process is first Application, adopt gantry crane, flat car, steel pier, wire rope and special tooling equipment to piece together the good steel pipe truss arch rib of place assembly unit and place into the bridge state crouching, position and the building site of regulating arch rib joint flange dish become the bridge controlling parameter, for large span steel pipe truss arch steel work, upright assembly state more approaches building site lifting state, accuracy of manufacture height becomes bridge linear attractive in appearance.
The present invention by movable jig frame and fixedly moulding bed be built into and stand up moulding bed, in guaranteeing the stable process of standing up of sections, save the moulding bed manufacturing cost.When standing up moulding bed with upright when piecing together moulding bed and being welded into a whole, can make sections be transferred to upright distance of piecing together moulding bed and significantly shorten from standing up moulding bed, difficulty obviously reduces, thus it is little better to control each parameter of sections amplitude of variation when lifting.
The present invention adopts the upright manufacturing process of piecing together first in large span steel pipe truss arch steel work is made, piece together the good steel pipe truss arch rib of place assembly unit crouching and place into the bridge state, position and the building site of regulating arch rib joint flange dish become the bridge controlling parameter, because upright assembly state more approaches building site lifting state, steel pipe truss arch accuracy of manufacture height, become bridge linear attractive in appearance, accumulated the upright technology experience of piecing together of large span steel pipe truss arch, provide reference for making in the later similar bridge type factory.
Description of drawings
Fig. 1 is the gantry crane district place arrangement diagram of the embodiment of the invention.
Fig. 2 transfers to the schematic diagram that stands up on the moulding bed for the sections to be assembled of the embodiment of the invention from flat car.
Fig. 3 stands up process schematic diagram one for the sections to be assembled of the embodiment of the invention standing up on the moulding bed.
Fig. 4 stands up process schematic diagram two for the sections to be assembled of the embodiment of the invention standing up on the moulding bed.
Fig. 5 erects schematic diagram for the sections to be assembled of the embodiment of the invention standing up to stand up on the moulding bed.
Fig. 6 is transported to the upright moulding bed schematic diagram of piecing together for adopting gantry crane in the embodiment of the invention with sections to be assembled.
Fig. 7 is the upright moulding bed schematic diagram of piecing together for second sections to be assembled in the embodiment of the invention is transported to.
Fig. 8 is the upright moulding bed schematic diagram of piecing together for the 3rd sections to be assembled in the embodiment of the invention is transported to.
Fig. 9 is No. 1 fixing moulding bed structural representation in the embodiment of the invention.
Figure 10 is No. 2 fixing moulding bed structural representations in the embodiment of the invention.
Figure 11 is the sections of an embodiment of the invention schematic diagram that falls.
Figure 12 is the workflow diagram of the embodiment of the invention.
Wherein, the 1-movable jig frame, 2-is moulding bed fixedly, 3-sections to be assembled, 4-wire rope, 5-sections upper chord, upright moulding bed, 7-3# sections to be assembled, 8-2# sections to be assembled, 9-1# sections to be assembled, 10-fulcrum positioning seat, 11-steel pier, the 12-steel plate pieced together of 6-.
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment, structure, feature and the effect thereof of the upright assembling method of large span steel pipe truss arch that foundation the present invention is proposed are elaborated.
At first, general thought to the upright assembling method of large span steel pipe truss provided by the invention arch describes: The present invention be directed to the available technology adopting main arch rib when crouching assembling process, its manufacturing state with become the bridge state not meet, when the building site lifts can because the deadweight under around etc. reason cause the main arch rib linear change big, main arch flange closely connected bad and influence the problem of the overall appearance of steel pipe truss arch bridge, adopt upright assembly unit mode will crouch piece together place assembly unit steel pipe truss arch rib after the assay was approved be transported to upright piece together special-purpose place stand piece together inspection after, be transported to storage area again or sections shipping district carries out follow-up work.
The workflow diagram of the embodiment of the invention as shown in figure 12, concrete operating procedure of the present invention is: make and stand up moulding bed and the upright moulding bed 6 of piecing together, all the steel pipe truss arch rib is after the assembly place assembly unit of crouching finishes, according to the assembly unit step, with each sections to be assembled be divided into first sections to be assembled, second sections to be assembled, to n sections to be assembled, wherein, n equals sections quantity to be assembled.Transfer to the schematic diagram that stands up on the moulding bed from flat car with reference to sections to be assembled shown in Figure 2, adopt flat car will need the sections 3 of assembly unit to be transported to the upright special-purpose place of piecing together, shown in Figure 1 is gantry crane district place arrangement diagram, adopts gantry crane that sections 3 to be assembled is fallen to being positioned at special use again and stands up on the moulding bed.As shown in Figure 3, in the present embodiment stand up moulding bed by movable jig frame 1 and fixedly moulding bed 2 form, when sections 3 to be assembled falls to being positioned at when standing up on the moulding bed, sections 3 to be assembled is to support its upper chord 5 by movable jig frame 1, fixedly moulding bed 2 its lower chords of support.Next, as shown in Figure 4, utilize gantry crane to stand up on the moulding bed in special use sections to be assembled 3 original places are stood up, after standing up, it is temporary fixed to adopt wire rope to carry out, and this moment, sections 3 to be assembled erected on fixing moulding bed 2 as shown in Figure 5.Then, dismounting movable jig frame 1 is connected with ground, hang out with gantry crane, as shown in Figure 6, the sections to be assembled 3 that utilizes gantry crane to erect again stands up moulding bed from special use and winches to upright the assembly on the moulding bed 6, to be transferred to upright distance of piecing together moulding bed 6 short as much as possible from standing up moulding bed in order to make sections 3 to be assembled, the fixedly moulding bed 2 that stands up in the moulding bed can be welded into a whole with the upright moulding bed 6 of piecing together.With sections 3 to be assembled from stand up moulding bed be transferred to upright piece together moulding bed 6 after, carry out fixed support with wire rope and special-purpose supporting frame.With gantry crane movable jig frame 1 is winched to the correspondence position location that next sections uses again, promptly the position relation according to lower chord on next sections navigates to the fixedly relative position of moulding bed 2 with movable jig frame 1, with flat car next sections to be assembled is transported to the upright place of piecing together again, repeat said process, fixedly finish behind next sections to be assembled, stand to piece together and check, check arch rib straightness accuracy and flange applying degree, and carry out record, the repetition said process is fixed to the upright moulding bed 6 of piecing together with remaining sections one by one according to intersegmental assembly unit step and stands the assembly inspection and carry out record; After upright assembly is finished, with gantry crane each sections is hung oneself and is transported to special use and stands up on the moulding bed from the upright moulding bed 6 of piecing together one by one, after droping to the ground with the gantry crane original place, droping to the ground, the sections after will droping to the ground with gantry crane again hangs on the flat car, transports.
Required relevant device among the present invention: flat car, two gantry cranes, stand up moulding bed, the upright moulding bed of piecing together.Wherein, the girder of gantry crane adopts twin-spar construction, and two side legs adopt variable cross-section herringbone supporting leg, and every loop wheel machine is provided with one of main hook, one of auxiliary hook, and the specified weight of standing up is greater than bridge subsection weight, hoisting process schematic diagram such as Fig. 2 are to shown in Figure 8.The wire rope of lifting usefulness is selected for use and is met GB 8918-2006 standard.
Present embodiment gives the concrete production program that stands up moulding bed: stand up moulding bed and comprise movable jig frame 1 and fixing moulding bed 2, wherein, fixedly moulding bed 2 comprises the fixedly fixing moulding bed of moulding bed and No. 2 No. 1, No. 1 fixedly moulding bed and No. 2 fixedly moulding bed respectively comprise two groups, every group is formed by connecting by at least three steel piers 11 back head and the tail of droping to the ground.
In the present embodiment every group No. 1 fixedly moulding bed adopt 3 800*800*1700 steel piers compositions of droping to the ground, connect solid weldings with steel plate 12 between steel pier side direction, every group side also is provided with fulcrum positioning seat 10, is used to stand up fixing of fulcrum.Every group No. 2 fixedly moulding bed also be to adopt 3 800*800*1700 steel piers compositions of droping to the ground, with steel plate 12 connection solid weldings, its structure is as shown in figure 10 between steel pier side direction.The steel pier 11 that movable jig frame 1 also can adopt is implemented, and in the present embodiment is 1 800*800*1700 steel pier adopting formation of droping to the ground.Movable jig frame 1 and fixedly each steel pier 11 of moulding bed 2 be provided with stone bolt, ground, steel pier position pre-embedded bolt can be rigidly connected the steel pier with ground.
The mounting method that stands up the steel pier is with reference to figure 1 and Figure 11, adopt gantry crane with No. 1 fixedly moulding bed and No. 2 fixedly the sections that is transported in the arrangement diagram shown in Figure 1 of moulding bed stand up the district, according to No. 1 fixedly two groups of moulding bed be arranged at two ends respectively, mode in the middle of No. 2 fixedly each group of moulding bed is arranged at is moved towards to arrange along the lower chord structure of sections 3 to be assembled, fixedly each steel pier 11 and the ground of moulding bed are rigidly connected with No. 1, No. 2, as the honest position of the 2-1 steel among Figure 11, the honest position of 2-3 steel is No. 1 fixedly position that is provided with of moulding bed, and 2-2 steel pier position is No. 2 fixedly positions that are provided with of moulding bed.The sections that movable jig frame 1 is transported in the arrangement diagram shown in Figure 1 stands up the district, last lower chord position relation according to the stage 3 to be assembled, support by fixing moulding bed 2 according to lower chord, upper chord is set to correspondence position by the rule that movable jig frame 1 supports, as the honest position of 2-4 among Figure 11～2-6 steel, finger 2-4,2-5,2-6 are respectively put a movable jig frame 1, and each steel pier 11 in the movable jig frame 1 is rigidly connected with ground.
Below according to mentality of designing of the present invention and operating procedure, specific implementation process of the present invention is described as follows: the assembly unit round is seen assembly unit round table, first run sections is pieced together in advance, needs to carry out assembly unit by 3# sections 7 → 2# sections 8 → 1# sections 9 orders, at first carries out the transhipment and the lifting of 3# sections 7.
(1) sections internal field transhipment
Sections is made completion, is pieced together after the assay was approved through crouching on the moulding bed of plane, be transported to the upright zone of piecing together of lifting by flat car, and before the transhipment, the web member of the required support of reply sections carries out strength check, just can carry out transhipment work after meeting the requirements.As the discontented podomere section traffic requirements of check result, need the sections web member is strengthened, strengthening measure comprises:
Adjust the sections Support Position, make flat car support web member as much as possible.
Tooling devices such as interim shoulder pole girder are set on flat car.
Adopt interim the support to increase web member intensity.
In the flat car walking process, underspeed, prevent to cause the sections distortion because of Uneven road causes to jolt.
Sections is rechecked the sections parameter before transporting to a back assembly unit, in time proofreaies and correct as finding off-gage phenomenon.
(2) 3# sections to be assembled 7 is transferred to from flat car and is stood up on the moulding bed
After 3# sections 7 to be assembled was transported to the lifting zone by flat car, two gantry cranes were opened simultaneously to lifting and are gone, and lift 3# sections 7 to be assembled, and after flat car withdrawed from, two cranes lifted the beam section to standing up the moulding bed zone.Stand up moulding bed and be made up of some steel piers 11, because of sections upstream and downstream sectional turn-over direction difference, steel pier 11 is arranged at gantry crane district bilateral, is seen Fig. 2.
(3) portal crane changes the upper chord 5 of hook to 3# sections 7 to be assembled, carries out the rib-lifting section setting and stands up, and sees Fig. 3 to Fig. 5.
(4) as shown in Figure 6, stand up put in place after, two loop wheel machines lift 3# sections 7 to be assembled simultaneously, and 3# sections 7 to be assembled is transported to upright the assembly on the moulding bed 6, check sections control point absolute altitude and stand up the distortion situation of sections in the transport process.
(5) extremely shown in Figure 8 as Fig. 7, repeat said process, 2# sections 8 to be assembled, 1# sections 9 to be assembled are lifted to assigned address, whole sections fall behind the position, carry out sections examination assembly unit, according to assembly unit test data sheet form Content inspection section assembling quality, after the assay was approved, utilize gantry crane that sections is set level again, flat car is transported to the making that storage area or beam section shipping district carry out follow-up work with sections.
The upright flow process of piecing together
(1) adopts gantry crane, each steel pier 11 in the fixing moulding bed 2 is deployed, and be connected with the ground rigidity.
(2) adopt gantry crane with 2-4,2-5,2-6 location arrangements movable jig frame 1, and be connected with the ground rigidity, adopt flat car that sections 3 to be assembled is transported to the upright place of piecing together by the dress place of crouching again, according to the gantry crane location arrangements gantry crane shown in Fig. 1, and tie wire rope, confirm on inspection errorless after, can lift.Stable after sections 3 to be assembled is sling 200mm, check affirmation once more, after meeting lifting requirements, can formally lift.
Command two cranes to lift by crane simultaneously, sections 3 is lifted to standing up on the moulding bed.The verticality and the roadbed situation that in this hoisting process, will have the special messenger to observe two hoist lifting hooks, and in time situation is reported to the lifting commander.
(3) gantry crane is arranged in the lifting operation zone, after crane arranges, wire rope is hung on the upper chord 5 of sections 3 to be assembled by diagram, confirm on inspection errorless after, can lift.Sling behind moulding bed 200mm stablely when the upper chord 5 of sections 3 to be assembled, check affirmation once more, after meeting lifting requirements, can formally lift.
Repeat said process and locate remaining segmentation, exist side by side to piece together and check the linear and flange applying situation of arch rib, carry out inspection record.Location and inspection required precision see Table one:
Table one: upright assembly required precision
(4) upright piece together finish after, utilize two 160t loop wheel machines that sections 3 to be assembled is set level standing up on the moulding bed, require to transport the building site to according to the lifting unit in batches and carry out lifting operation.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. the upright assembling method of large span steel pipe truss arch is characterized in that, comprises the steps:
Step 1 is made and is stood up moulding bed and the upright moulding bed of piecing together;
Step 2, the transhipment sections: all steel pipe truss arch ribs are crouching assembly place assembly unit after the assay was approved, adopt flat car will need the sections of assembly unit to be transported to the upright special-purpose place of piecing together;
Step 3, sections to be assembled is erected standing up on the moulding bed: according to the assembly unit step, with each sections to be assembled be divided into first sections to be assembled, second sections to be assembled, to n sections to be assembled, wherein, n equals sections quantity to be assembled, with gantry crane first sections to be assembled on the flat car is fallen to being positioned at special use and stands up on the moulding bed, fall behind the position, with gantry crane first sections to be assembled is stood up on the moulding bed original place in special use and stand up and erect, after standing up, first sections to be assembled is temporary fixed with wire rope;
Step 4 is transported to the upright moulding bed of piecing together with the sections that erects: first sections to be assembled that utilizes gantry crane to erect stands up the steel pier from special use and winches to upright the assembly on the moulding bed, after the lifting, carries out fixed support with wire rope and special-purpose supporting frame;
Step 5 is transported to the upright place of piecing together with flat car with second to the n sections to be assembled, repeats said process, behind all sections to be assembled that fixedly finish one by one, stands to piece together and checks, checks arch rib straightness accuracy and flange applying degree, and carries out record;
Step 6, drop to the ground and transport finishing the upright sections of piecing together: after upright assembly is finished, with gantry crane each sections to be assembled is hung oneself and is transported to special use and stands up on the moulding bed from the upright moulding bed of piecing together one by one, drop to the ground with the gantry crane original place, with gantry crane sections to be assembled is hung on the flat car again, be transported to storage area or sections shipping district carries out follow-up work.
2. the upright assembling method of large span steel pipe truss arch as claimed in claim 1, it is characterized in that, in the step 2, adopt flat car will need the sections of assembly unit to be transported to upright the assembly before the special-purpose place, the web member of tackling the required support of sections to be assembled carries out strength check, just transport after meeting the requirements, the discontented podomere section traffic requirements of check result, in the following manner the sections web member is strengthened:
Adjust the sections Support Position, make flat car support web member as much as possible, interim shoulder pole girder is set on flat car, adopt interim the support to increase web member intensity, reduce the flat car speed of travel, after sections is transported to the special-purpose place of upright assembly, before the assembly unit, the sections parameter is rechecked, and the discovery off-gage phenomenon is in time proofreaied and correct.
3. the upright assembling method of large span steel pipe truss as claimed in claim 1 or 2 arch is characterized in that, the described moulding bed that stands up comprises movable jig frame and fixing moulding bed,
When step 3 erects sections to be assembled on standing up moulding bed, movable jig frame is fixed on the fixedly relative position of moulding bed according to the last lower chord position of first sections to be assembled relation, with gantry crane first sections to be assembled on the flat car is fallen to being positioned at fixedly on the moulding bed and movable jig frame, at this moment, fixedly moulding bed supports the lower chord of first sections to be assembled, movable jig frame supports the upper chord of first sections to be assembled, fall behind the position, with gantry crane first sections to be assembled original place on fixing moulding bed is stood up and to erect, after standing up, with wire rope that first sections to be assembled is temporary fixed, the dismounting movable jig frame is connected with ground, winch to the correspondence position that next sections to be assembled uses with gantry crane, promptly first sections to be assembled is fixed on the fixedly relative position of moulding bed according to the last lower chord position relation of next sections to be assembled;
Step 6, drop to the ground in the process of transporting finishing the upright sections of piecing together, movable jig frame is fixed on the fixedly relative position of moulding bed according to the last lower chord position relation of waiting to put sections to be assembled for sleeping in, to wait to put sections to be assembled for sleeping in gantry crane hangs oneself and is transported to fixedly on the moulding bed from the upright moulding bed of piecing together, drop to the ground with the gantry crane original place, this moment, sections to be assembled was by fixedly moulding bed and movable jig frame support, after droping to the ground, with gantry crane sections to be assembled is hung on the flat car again, transport.
4. the upright assembling method of large span steel pipe truss arch as claimed in claim 3 is characterized in that described fixedly moulding bed and the described upright assembly moulding bed that stands up moulding bed is welded into a whole.
5. the upright assembling method of large span steel pipe truss arch as claimed in claim 3, it is characterized in that, the described fixedly moulding bed that stands up moulding bed comprises the fixedly fixing moulding bed of moulding bed and No. 2 No. 1, described No. 1 fixedly moulding bed and No. 2 fixedly moulding bed respectively comprise two groups, every group is formed by connecting by drop to the ground back head and the tail of at least three steel piers, each steel pier is provided with stone bolt, ground, steel pier position pre-embedded bolt, connect solid welding by steel plate between the steel pier head and the tail that each is droped to the ground in every group, No. 1 fixedly every group side of moulding bed also be provided with the fulcrum positioning seat, No. 1 fixedly moulding bed and No. 2 fixedly moulding bed the position according to No. 1 fixedly two groups of moulding bed be arranged at two ends respectively, the mode in the middle of No. 2 fixedly each group of moulding bed is arranged at move towards layout along sections lower chord structure to be assembled.
6. the upright assembling method of large span steel pipe truss arch as claimed in claim 4, it is characterized in that, the described fixedly moulding bed that stands up moulding bed comprises the fixedly fixing moulding bed of moulding bed and No. 2 No. 1, described No. 1 fixedly moulding bed and No. 2 fixedly moulding bed respectively comprise two groups, every group is formed by connecting by drop to the ground back head and the tail of at least three steel piers, each steel pier is provided with stone bolt, ground, steel pier position pre-embedded bolt, connect solid welding by steel plate between the steel pier head and the tail that each is droped to the ground in every group, No. 1 fixedly every group side of moulding bed also be provided with the fulcrum positioning seat, No. 1 fixedly moulding bed and No. 2 fixedly moulding bed the position according to No. 1 fixedly two groups of moulding bed be arranged at two ends respectively, the mode in the middle of No. 2 fixedly each group of moulding bed is arranged at move towards layout along sections lower chord structure to be assembled.
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| CN201110096537A CN102220811B (en) | 2011-04-18 | 2011-04-18 | Truss arching-erecting splicing method of extra-large-pan steel pipe |
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| CN201110096537A CN102220811B (en) | 2011-04-18 | 2011-04-18 | Truss arching-erecting splicing method of extra-large-pan steel pipe |
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| CN105822066A (en) * | 2016-04-07 | 2016-08-03 | 中建六局第三建筑工程有限公司 | Construction method for underground large-span large-space ultrahigh non-column steel structural tube truss |
| CN106049286A (en) * | 2016-06-15 | 2016-10-26 | 中交公局桥隧工程有限公司 | Integral lifting and installation construction method for prefabricated temporary steel pipe brackets |
| CN112411753A (en) * | 2020-11-25 | 2021-02-26 | 中交第二航务工程局有限公司 | Construction method of large-span suspended steel truss girder structure |
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| CN105586834A (en) * | 2016-02-26 | 2016-05-18 | 江苏中铁山桥重工有限公司 | Bridge beam arch rib section manufacturing process |
| CN105586834B (en) * | 2016-02-26 | 2017-07-28 | 江苏中铁山桥重工有限公司 | A kind of bridge arch rib section manufacture craft |
| CN105822066A (en) * | 2016-04-07 | 2016-08-03 | 中建六局第三建筑工程有限公司 | Construction method for underground large-span large-space ultrahigh non-column steel structural tube truss |
| CN105822066B (en) * | 2016-04-07 | 2017-11-24 | 中建六局第三建筑工程有限公司 | Underground large span large space superelevation is without post steel-structure tube truss construction engineering method |
| CN106049286A (en) * | 2016-06-15 | 2016-10-26 | 中交公局桥隧工程有限公司 | Integral lifting and installation construction method for prefabricated temporary steel pipe brackets |
| CN106049286B (en) * | 2016-06-15 | 2017-12-01 | 中交一公局桥隧工程有限公司 | A kind of prefabricated interim steel pipe support integral hoisting construction method of installation |
| CN112411753A (en) * | 2020-11-25 | 2021-02-26 | 中交第二航务工程局有限公司 | Construction method of large-span suspended steel truss girder structure |
| CN118004892A (en) * | 2024-04-08 | 2024-05-10 | 中铁四局集团有限公司 | Truss sheet land safety overturning control device and use method |
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