CN108517779A - Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder - Google Patents
Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder Download PDFInfo
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- CN108517779A CN108517779A CN201810272032.5A CN201810272032A CN108517779A CN 108517779 A CN108517779 A CN 108517779A CN 201810272032 A CN201810272032 A CN 201810272032A CN 108517779 A CN108517779 A CN 108517779A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder of the present invention, it is characterised in that：Include the following steps：Preparation of construction → strip footing prefabricated unit processing → steel pipe post unit processing → bridging unit processing → transverse distribution beam element system processing → elevation adjustment sand bucket unit system processing → longitudinal direction girder unit processing → strip footing prefabricated unit installation → steel pipe post unit installation → bridging unit installation → transverse distribution beam element system assembly → elevation adjustment sand bucket unit installation → longitudinal direction girder unit is installed → inspects for acceptance and integrally assembles across the high speed door opening structure of situation → dismounting.It is constructed using the construction, is greatly reduced construction period and waste of material, reduce construction cost, constructing operation is simple and easy to do, environmentally protective.Accuracy and the safety in turn ensuring door opening structure simultaneously, reach quick construction, energy saving, efficient, safe good result, there is promotional value.
Description
Technical field
The invention belongs to road, bridge fields, are related to a kind of across high speed door opening assembling of low clearance variable cross-section curved box girder
Method for Installation is suitable for city or suburb, and across the high speed door opening structure in other areas can refer to execution.
Background technology
Across the high speed door opening structure construction traditional construction technique of low clearance variable cross-section curved box girder is mainly poured using scene at present
It builds, process, installing and welding procedure method is constructed.The advantages of such construction operation is skilled operation, but takes tradition
Construction technology, each construction procedure is required to longer construction period, and exists for low clearance variable cross-section curved box girder
In the case that door opening superstructure can not use full framing, the high process control of door opening structural top is required higher, will be further
Lengthen construction period.For across high speed door opening structure construction, since construction period highway need to carry out piggybacking traveling, because
This guaranteed shorter construction period can greatly reduce the security risk of vehicle on highway piggybacking traveling.In addition,
It needs scene to cut and weld section steel material when being constructed using traditional construction technology, is unable to fully utilize construction material
Material, can cause construction material certain waste.And in construction period since the construction period is nervous and weld job is most of
It needs to be implemented in high-altitude, therefore structure welding construction quality is unable to get comprehensive guarantee.In conclusion how safe,
Fast, accurate, energy saving, high quality across the high speed door opening structure construction of carry out low clearance variable cross-section curved box girder becomes urgently to be resolved hurrily
The problem of.
Invention content
The present invention is to make up the deficiencies in the prior art, provide it is a kind of safely, quickly, accurate, energy-efficient low clearance variable cross-section
Across the high speed door opening assembling Method for Installation of curved box girder.
The present invention is achieved through the following technical solutions：
Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder of the present invention, it is characterised in that：Including following step
Suddenly：
Preparation of construction → strip footing prefabricated unit processing → steel pipe post unit processing → bridging unit processing → transverse direction point
With beam element system processing → elevation adjustment sand bucket unit system processing → longitudinal direction girder unit processing → prefabricated list of strip footing
First installation → steel pipe post unit installation → bridging unit installation → transverse distribution beam element system assembly → elevation adjusts sand
Bucket unit installation → longitudinal direction girder unit is installed →, which is inspected for acceptance, integrally assembles across the high speed door opening structure of situation → dismounting.
Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder of the present invention, including step in detailed below：
（1）Preparation of construction
The pier stud construction of across high speed variable cross-section curved box girder both sides is completed, and acceptance(check)；
（2）Strip footing prefabricated unit is processed
Prefabricated processing strip footing prefabricated unit is carried out according to strip footing prefabricated unit detailed construction figure, strip footing is prefabricated
Unit is C30 reinforced concrete structures, and structure is prefabricated to carry out prefabricated, the pre-buried one block of steel of top center using customization steel form
Plate；Yellow black reflectorised paint striped is painted after completing, and according to number order using forklift transport to construction site；
（3）Steel pipe post unit workshop processes
D500 steel pipe post units carry out Mechanized Processing using workshop, to ensure that steel pipe post element solder quality and blanking are long
Degree is accurate, steel pipe post material selection D500*10mm seamless steel pipes, and steel pipe top and bottom weld size are 55*55*
4 brackets are arranged with steel pipe post angled posi-tion in 2cmQ345 steel plates, steel plate, and in installation bridging corresponding position according to drawing
Design welding bridging connects bracket；Through carrying out the yellow black reflectorised paint striped of painting, and root to steel pipe post unit after the assay was approved
It is transported according to number order spare to construction site；
（4）Bridging unit makes processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging carries out making processing using 14# channel steels,
Antirust paint is painted outside bridging, and is transported according to number order spare to construction site；
（5）Transverse distribution beam element system is processed
Transverse distribution beam element is made using 45# Two bors d's oeuveres I-steel, to 45# I-steel carry out Two bors d's oeuveres welding, i.e., two
Root I-steel welds together side by side, and transverse distribution beam element system is made；
（6）Elevation adjusts the processing of sand bucket unit system
Bucket column is processed using D133*10mm seamless steel pipes on elevation adjustment sand bucket, and 10mm thickness Q345 steel plates is used in combination to be welded
It connects and blocks upper end；Lower bucket column is processed using D159*10mm seamless steel pipes, and thickness 15mmQ345 steel plates is used in combination to be blocked down
End；Upper bucket column is inserted into lower bucket column；Lower bucket column bottom screws in two D25mm bolts as sand outlet in symmetric position；
（7）Longitudinal girder unit processing
Longitudinal girder unit is using 50# I-steel as lower layer's bottom girder, and 50# I-steel top is every a spacing piece steel of 1 meter of welding
Pipe upright bar, steel tube poles top welding 12.6# I-steel are used as the longitudinal distribution beam in top；To every longitudinal girder unit respectively into
Row number and transport according to number order arrange spare to construction site；
（8）Strip footing prefabricated unit is installed
（8-1）Go out the corresponding position that every row's strip footing is installed on road surface according to Design Requirement Drawing surveying and locating；
（8-2）After determining installation site, it is laid with two layers of geotextiles in the corresponding installation site of strip footing, prevents leveling mortar to original
Asphalt concrete pavement pollutes；
（8-3）According to corresponding drawing number, assembling is carried out respectively to prefabricated strip footing prefabricated unit reference numeral
Installation；Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling, or be connected by embedded bar welding
Connect two pieces of adjacent strip footings；
（8-4）Strip footing top surface pre-embedded steel slab elevation is measured in time after installation is complete and is met, measurement meet it is errorless after
It can carry out the assembling installation of next unit system；
（9）Steel pipe post unit is installed
（9-1）Go out the corresponding position of every steel pipe post unit installation according to layout design position surveying and locating；
（9-2）After determining installation site, the D500 steel pipe posts unit processed is lifted one by one according to number order to corresponding
Position is simultaneously welded and fixed with the pre-buried good steel plate in top in strip footing prefabricated unit；
（9-3）Each D500 steel pipe post unit elevation of top surface and verticality measure and meet in time after installation is complete, measure
Meet errorless and Welding quality test it is qualified after can carry out the assembling installation of next unit system；
（10）Bridging unit is installed
（10-1）D500 steel pipe posts installation is complete through measure meet it is errorless after carry out bridging support installation；
（10-2）The bridging processed is lifted between each two D500 steel pipe posts, four foot of bridging after good position is adjusted
The connection bracket reserved with D500 steel pipe post units is welded and fixed；
（10-3）Installation is complete that the dress of next unit system can be carried out after examining welding quality no problem for bridging unit
It is installed with changing；
（11）Transverse distribution beam element system is assembled
（11-1）Bridging unit carries out the installation of 45# Two bors d's oeuveres I-steel transverse distribution beams after installation is complete；
（11-2）First D500 steel pipe need to be measured using steel ruler in transverse distribution beam sides according to layout design position before lifting
The center of column, with facilitate lifting after can accurately be placed into corresponding position；
（11-3）After the completion of the lifting of transverse distribution beam, transverse distribution beam is weldingly fixed on steel pipe post unit top, immediately to cross
It measures and meets to distribution beam plan-position and design altitude；
（11-4）Transverse distribution beam and each D500 steel pipe posts unit contact position both sides are welded after measurement review is errorless
Bracket limited block, is reinforced；
（11-5）After the completion of welding bracket limited block, next cell cube can be carried out after examining welding quality to meet the requirements
The installation of system；
（12）Elevation adjusts the installation of sand bucket unit
（12-1）Transverse distribution beam goes out each elevation after installation is complete, according to the setting-out of layout design position and adjusts setting for sand bucket unit
Position is counted, and draws cross hairs and carries out position mark；
（12-2）On transverse distribution beam, Installation Elevation adjustment sand bucket unit is carried out one by one according to mark position, installation is complete
Each sand bucket and transverse distribution beam are welded and fixed afterwards, to prevent sand bucket from shaking during adjusting elevation, shadow
Ring the accuracy of elevation adjustment data；
（12-3）After the completion of elevation adjustment sand bucket installation is fixed, sand bucket carries out sand loading one by one, and level is utilized during sand loading
Instrument adjusts sand bucket to design altitude；
（12-4）The adjustment of sand bucket elevation completes that the installation of next unit system can be carried out after measurement review is errorless；
（13）Longitudinal girder unit installation
（13-1）Elevation adjusts sand bucket after installation is complete, and longitudinal girder unit lifting is carried out according to the corresponding number order of layout design
Construction；Longitudinal girder is placed on above sand bucket, and is welded and fixed with sand bucket；
（13-2）Adjacent two longitudinal girders are attached at both ends using 12.6# I-steel；
（13-3）All longitudinal girder units will after installation is complete, penetrate between the steel tube poles of every longitudinal girder elongated
Lateral steel pipe, be attached using the steel tube poles of the longitudinal girder unit of fastener and every, to increase longitudinal girder unit
Overall stability and safety；
（14）Entirety of inspecting for acceptance assembly situation
Whole assembling measures longitudinal girder unit elevation of top surface meet first after installation is complete, it is ensured that measures review
As a result errorless；Then whole pads during door opening Standard installation across high speed to entirety carry out welding quality
It checks, on inspection after acceptance(check), across fast chamber beam structure construction can be carried out；
（15）Remove across high speed door opening structure
After the completion of waiting for across high speed variable cross-section curved box girder construction, Demolition Construction is carried out to across high speed door opening structure, structural demolition is applied
Work is constructed with installation process inverted sequence；Construction process is as follows：It removes longitudinal girder unit → dismounting elevation and adjusts sand bucket unit
→ remove transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe posts unit → dismounting strip footing
Prefabricated unit → cleaning construction site → recovery highway normal pass.
This construction method is using across the high speed door opening assembling Method for Installation construction of low clearance variable cross-section curved box girder, across high speed
Door opening construction can carry out each separate unit system split batch production and specialized processing, each unit system early period
Processing quality it is guaranteed, and data size precision controlling is accurate.Assembling can be completed in a short time when engineering construction
Installation greatly reduces the time of highway piggybacking traveling, accordingly also greatly reduces the vehicle traveling of construction period
Security risk and construction safety hidden danger.
Using across the high speed door opening assembling Method for Installation construction of low clearance variable cross-section curved box girder, according to construction drawing before construction
Design and construction on-site actual situations carry out global design to across high speed door opening structure and carry out mechanical analysis, and global design is complete
Across high speed door opening structure is split as each independent unit system after, and thin portion number is carried out to each independent unit system
According to processing, the detailed construction drawing of each unit system is formed, unit system model is established.Each independent unit system selects respectively
It is processed with the construction teams and groups in suitable place and profession, each separate unit is numbered and is transported after the completion of processing and fabricating
Assembling installation is carried out to assembly preparation at the construction site.According to number order by each separate unit body when door opening structure construction
It is that module carries out assembling installation, can be not only completed in a short time the installation of door opening structure, but also can strictly control door opening structure
Construction quality.
The invention has the advantages that constructing using the construction, across high speed door opening structure construction can be made to make
Industry standardization, sequencing, standardization, operator and manager are easier to grasp, and are greatly reduced construction period and material wave
Take, reduce construction cost, constructing operation is simple and easy to do, environmentally protective.The accuracy and peace of door opening structure are in turn ensured simultaneously
Quan Xing reaches quick construction, energy saving, efficient, safe good result.Using across the high speed door opening of low clearance variable cross-section curved box girder
Assembling Method for Installation construction, improves work efficiency, shortens the construction period, saves a large amount of human and material resources consumption,
Each across high speed door opening structure construction cost can reduce nearly 400,000 yuan.This method is suitable for city or suburb low clearance variable cross-section is bent
Across the high speed door opening structure of across the high speed door opening structure construction of line box beam, other areas can refer to execution.
The case where having applied and having promoted：The construction method helps wide high speed Jinan connecting line segment shop grade separation to around south of a city circuit
（Feng huangshan Mountain to south is around city section）It constructs the second bid section application, strict implement job specfication, operating instruction in construction process, work
Journey content meets design requirement, and construction quality meets Engineering Quality of Municipal Roads standard.Using " low clearance variable cross-section curved box girder
Across high speed variable cross-section curved box girder top surface after the completion of across high speed door opening assembling Method for Installation construction " construction and bottom surface elevation
Qualification rate reaches 100%, and box girder with variable cross section cross section and vertical section size qualification rate reach 100%, and it is complete to be constructed into bridge effect
Meet design and code requirement entirely, has wide application space, there is promotional value.
Description of the drawings
Fig. 1 is the workflow schematic diagram of the present invention.Fig. 2 is integrally-built front view schematic diagram, and Fig. 3 is a left side of Fig. 2
View schematic diagram.Fig. 4 is sand bucket schematic diagram, and Fig. 5 is longitudinal girder schematic diagram.
1 strip footing, 2 steel pipe posts, 3 brackets, 4 bridgings, 5 transverse distribution beams, 6 elevations adjust sand bucket, and 7 is longitudinal main
Beam, 8 lateral steel pipes, 9 square plates, 10 bolts, 11 steel tube poles, bucket column on 12,13 lower barrels of columns, 14 lower layer's bottom girders, 15 tops
Longitudinal distribution beam, 16 bracket limited blocks.
Specific implementation mode
Attached drawing is a kind of specific embodiment of the present invention.
The construction method of the present invention, according to construction drawing design and construction on-site actual situations, to across high speed door opening structure
Global design is carried out, establishing structural model using Midas's software carries out mechanical analysis, and design, which is calculated, by precision calculates
Book, and arrangement and method for construction and detailed construction drawing are formed, after being expounded through peer review, determine that Scheme Security is feasible.
Whole rationally split according to assembly situation of across high speed door opening structure becomes each independent unit system, each unit
System is processed respectively.
Each separate unit system machine and it is qualified by inspection after, mark is numbered respectively according to construction drawing design
Know, and each separate unit is transported to assembly preparation at the construction site and carries out assembling installation.
Review is measured in assembling installation process will in time, accurately.
Assembling will check assembling installation situation in time after installation is complete, ensure prefabricated construction quality.
Door opening includes the strip footing 1 positioned at surface road both sides, row's strip footing can be added among road, if
Dry strip footing is arranged along link length direction, is fixedly connected between adjacent two pieces of strip footings；Strip footing uses steel
Tendon concrete structure, strip footing upper end center position pre-embedded steel slab.Steel pipe post 2 is vertically fixedly connected pre-buried in strip footing
Steel plate, fix a steel pipe post in each strip footing, bracket 3 is respectively welded in the upper and lower part of every steel pipe post,
For connecting bridging.The bridging 4 of X-shaped is connected between adjacent two steel pipe posts, four feet of bridging are welded on steel pipe
On the bracket of column.Often a transverse distribution beam 5 is welded on the top of row's steel pipe post, i.e., the direction of transverse distribution beam is along landing ground
The length direction of road.The upper surface of transverse distribution beam is alongst welded and fixed several elevations adjustment sand bucket 6.Elevation tune
Weld longitudinal girder 7 on whole sand bucket, longitudinal girder is located at horizontal direction and vertical with surface road length direction.On longitudinal girder
Laying is fixed with several lateral steel pipes 8.Steel pipe post, transverse distribution beam, longitudinal girder constitute door opening main body, lateral steel together
Pipe constitutes the plane at the top of door opening together with longitudinal girder.
Elevation adjusts sand bucket 6, including one section of seamless steel is respectively adopted in upper bucket column 12 and lower bucket column 13, upper bucket column, lower bucket column
Pipe is made, and upper bucket column upper end carries out welding closure with square plate 9；Lower bucket column lower end carries out welding closure using square plate 9；
Upper bucket column is inserted into lower bucket column；Two bolts hole are arranged in symmetric position in lower bucket column bottom, and screw in two 10 conducts of bolt
Sand outlet.
When sand bucket is packed into sand, first sand bucket is stood upside down, upper bucket column and lower bucket column are separated, upper bucket column mouth upward, is packed into sand
The opening of son, lower bucket column is buckled in the opening of bucket column, then that sand bucket is upright, makes bucket column in upper and lower bucket column lower.
Longitudinal girder 7, including the lower layer's bottom girder 14, top longitudinal direction distribution beam 15 and the steel tube poles 11 that weld together, are adopted
With 50# I-steel as lower layer's bottom girder, lower layer's bottom girder top alongst one row's steel tube poles of uniform welding, steel tube poles
It welds a 12.6# I-steel and is used as the longitudinal distribution beam in top in top.
Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder of the present invention, includes the following steps：
（1）Preparation of construction
1）, across high speed door opening structure construction relates to high speed formality all examination ＆ approval completed；
2）, the construction of across high speed variable cross-section curved box girder both sides pier stud complete, and through management acceptance(check)；
3）, material be ready for complete, meet construction requirement through live retrial；
（2）Strip footing prefabricated unit is processed
Prefabricated processing strip footing prefabricated unit is carried out according to strip footing prefabricated unit detailed construction figure, strip footing is prefabricated
Unit is C30 reinforced concrete structures, and structure is prefabricated to carry out prefabricated, the long 300cm of strip footing using customization steel form, high
120cm, wide 90cm, the pre-buried 90*100*1cm steel plates of top center.Yellow black reflectorised paint striped, and root are painted after completing
According to number order using forklift transport to construction site.
（3）D500 steel pipe post units workshop processes
D500 steel pipe post units carry out Mechanized Processing using workshop, to ensure that steel pipe post element solder quality and blanking are long
Degree is accurate, steel pipe post material selection D500*10mm seamless steel pipes, and steel pipe top and bottom welding steel size are 55*55*
4 brackets are arranged with steel pipe post angled posi-tion in 2cmQ345 steel plates, steel plate, and in installation bridging corresponding position according to drawing
Design welding bridging connects bracket.
D500 steel pipe post units are constructed when processing in strict accordance with unit construction drawing, butt welding contact after the completion of welding
It is detected flaw detection, it is ensured that welding quality problems.Through carrying out the yellow black reflectorised paint of painting to steel pipe post unit after the assay was approved
Striped, and transported according to number order spare to construction site.
（4）Bridging unit makes processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging using 14# channel steels processing workshop into
Row carries out making processing, to ensure that welding quality and cutting length are accurate.Bridging unit is constructed when processing in strict accordance with unit
Drawing is constructed, and butt welding contact is detected flaw detection after the completion of welding, it is ensured that steel pipe post list after welding quality problems
Member carries out painting antirust paint, and is transported according to number order spare to construction site.
（5）Transverse distribution beam element system is processed
Transverse distribution beam element is made using 45# Two bors d's oeuveres I-steel, at the construction field (site) to 45# I-steel in machining shed
Two bors d's oeuveres welding is carried out, i.e. two I-steel weld together side by side, and 45# Two bors d's oeuveres I-steel are welded into using zigzag notch
The transverse distribution beam element system that length is 27 meters, butt welding contact is detected flaw detection after the completion of welding, it is ensured that welding quality
It is transported after problem spare to construction site.
（6）Elevation adjusts the processing of sand bucket unit system
Elevation adjustment sand bucket unit making processing is carried out in processing workshop according to layout design size, with ensure welding quality and under
Expect that length is accurate.Elevation is adjusted bucket column on sand bucket and is processed using D133*10mm seamless steel pipes, and 10mm thickness diameters are used in combination
133mm steel plates carry out welding and block upper end, and lower bucket column is processed using D159*10mm seamless steel pipes, adjust sand bucket upper steel plate
Welding is carried out using 220*220*10mmQ345 steel plates and blocks lower end, lower steel plate is sealed using 250*250*15mmQ345 steel plates
It is stifled.Two D25mm bolts are arranged as sand outlet in symmetric position in lower bucket column bottom.Elevation adjusts sand bucket unit and machines
Sand bucket size and welding quality are detected afterwards, transported after the assay was approved spare to construction site.
（7）Longitudinal girder unit processing
Longitudinal girder unit is using 12 meters long 50# I-steel as lower layer's bottom girder, and 50# I-steel top is every 1 meter of setting 1 of spacing
Root φ 48mm × 3.5mm steel pipes are welded as upright bar and with 50# I-steel, and 12.6# I-steel conducts are welded at the top of upright bar
Top longitudinal direction distribution beam.
Longitudinal girder unit is processed in machining shed at the construction field (site), when every longitudinal girder unit processing, it is necessary to tight
Lattice carry out blanking making according to detailed construction drawing, and every longitudinal girder is after processing is completed according to layout design one by one to each rod piece
Size, which measures, to be met, through measure meet errorless and Welding quality test it is qualified after, to every longitudinal girder unit respectively into
Row number and transport according to number order arrange spare to construction site.
（8）Strip footing prefabricated unit is installed
（1）Go out the corresponding position that every row's strip footing is installed on road surface according to Design Requirement Drawing surveying and locating；
（2）After determining installation site, it is laid with two layers of geotextiles in the corresponding installation site of strip footing, prevents leveling mortar from being dripped to original
Green concrete road surface pollutes；
（3）According to corresponding drawing number, assembling peace is carried out respectively to prefabricated strip footing prefabricated unit reference numeral
Dress.Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling, or be connected by embedded bar welding
Two pieces of adjacent strip footings.
（4）Strip footing top surface pre-embedded steel slab elevation is measured in time after installation is complete and is met, measurement meets errorless
The assembling installation of next unit system can be carried out afterwards.
（9）Steel pipe post unit is installed
（1）Go out the corresponding position of every steel pipe post unit installation according to layout design position surveying and locating；
（2）After determining installation site, the D500 steel pipe posts unit processed is lifted one by one according to number order to corresponding positions
It sets and is welded and fixed with the pre-buried good steel plate in top in strip footing prefabricated unit；
（3）Each D500 steel pipe post unit elevation of top surface and verticality measure and meet in time after installation is complete, measure symbol
Close errorless and Welding quality test it is qualified after can carry out the assembling installation of next unit system.
（10）Bridging unit is installed
（1）D500 steel pipe posts installation is complete through measure meet it is errorless after carry out bridging support installation；
（2）The bridging processed is lifted between each two D500 steel pipe posts, adjust after good position four foot of bridging with
The connection bracket that D500 steel pipe post units have been reserved is welded and fixed；
（3）Installation is complete that the assembling of next unit system can be carried out after examining welding quality no problem for bridging unit
Installation.
（11）Transverse distribution beam element system is assembled
（1）Bridging unit carries out the installation of 45# Two bors d's oeuveres I-steel transverse distribution beams after installation is complete；
（2）It is vertical that first D500 steel pipe need to be measured using steel ruler in transverse distribution beam sides according to layout design position before lifting
The center of column, with facilitate lifting after can accurately be placed into corresponding position；
（3）After the completion of the lifting of transverse distribution beam, transverse distribution beam is weldingly fixed on steel pipe post unit top, immediately to laterally dividing
It measures and meets with beam plan-position and design altitude；
（4）Bracket is welded to transverse distribution beam and each D500 steel pipe posts unit contact position both sides after measurement review is errorless
Limited block 16, is reinforced；
（5）After the completion of welding bracket limited block 16, next cell cube can be carried out after examining welding quality to meet the requirements
The installation of system.
（12）Elevation adjusts the installation of sand bucket unit
1）Transverse distribution beam goes out the design position that each elevation adjusts sand bucket unit after installation is complete, according to the setting-out of layout design position
It sets, and draws cross hairs and carry out position mark；
（2）On transverse distribution beam, Installation Elevation adjustment sand bucket unit is carried out one by one according to mark position, it will after installation is complete
Each sand bucket carries out spot welding with transverse distribution beam and fixes, and to prevent sand bucket from shaking during adjusting elevation, influences height
The accuracy of journey tune entire data；
（3）Elevation adjust sand bucket installation it is fixed after the completion of, sand bucket carries out sand loading one by one, and will using spirit level during sand loading
Sand bucket is adjusted to design altitude；
（4）The adjustment of sand bucket elevation completes that the installation of next unit system can be carried out after measurement review is errorless.
（13）Longitudinal girder unit installation
（1）Elevation adjusts sand bucket after installation is complete, and carrying out longitudinal girder unit lifting according to the corresponding number order of layout design applies
Work；Longitudinal girder is placed on above sand bucket, and is welded and fixed with sand bucket；
（2）After 1st longitudinal girder unit lifting to corresponding position, it is fixed temporarily using I-steel trivet, waits for the 2nd
After the completion of longitudinal main cable and girder, adjacent two longitudinal girders are attached at both ends using 12.6# I-steel；
（3）It will all longitudinal girder units be carried out after installation is complete one by one with above-mentioned steps, it is vertical in the steel pipe of every longitudinal girder
Elongated φ 48mm × 3.5mm transverse direction steel pipes are penetrated between bar, are carried out using the steel tube poles of fastener and every longitudinal girder unit
Connection, to increase overall stability and the safety of longitudinal girder unit.
（14）Entirety of inspecting for acceptance assembly situation
Whole assembling measures longitudinal girder unit elevation of top surface meet first after installation is complete, it is ensured that measures review
As a result errorless.Then whole pads during door opening Standard installation across high speed to entirety carry out welding quality
It checks, on inspection after acceptance(check), supervising engineer is reported to check and accept.Through supervising engineer's acceptance(check) and confirmation of signing, Fang Kejin
Across the fast chamber beam structure construction of row.
（15）Remove across high speed door opening structure
After the completion of waiting for across high speed variable cross-section curved box girder construction, Demolition Construction is carried out to across high speed door opening structure, structural demolition is applied
Work is constructed with installation process inverted sequence.Construction process is as follows：It removes longitudinal girder unit → dismounting elevation and adjusts sand bucket unit
→ remove transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe posts unit → dismounting strip footing
Prefabricated unit → cleaning construction site → recovery highway normal pass.
Quality control
3）, actual measurement actual quantities project：
1. each unit system installation site centre deviation≤5mm；
2. each unit component surveys permissible variation in dimension ± 10mm；
3. D500 steel pipe post unit perpendicularity deviations are not more than 5mm；
4. top mark height and the design high deviation of top mark should be less than 5mm after the installation of each unit system.
Claims (2)
1. a kind of across high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder, it is characterised in that：Include the following steps：
Preparation of construction → strip footing prefabricated unit processing → steel pipe post unit processing → bridging unit processing → transverse direction point
With beam element system processing → elevation adjustment sand bucket unit system processing → longitudinal direction girder unit processing → prefabricated list of strip footing
First installation → steel pipe post unit installation → bridging unit installation → transverse distribution beam element system assembly → elevation adjusts sand
Bucket unit installation → longitudinal direction girder unit is installed →, which is inspected for acceptance, integrally assembles across the high speed door opening structure of situation → dismounting.
2. across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder according to claim 1, feature exist
In：Include the following steps：
（1）Preparation of construction
The pier stud construction of across high speed variable cross-section curved box girder both sides is completed, and acceptance(check)；
（2）Strip footing prefabricated unit is processed
Prefabricated processing strip footing prefabricated unit is carried out according to strip footing prefabricated unit detailed construction figure, strip footing is prefabricated
Unit is C30 reinforced concrete structures, and structure is prefabricated to carry out prefabricated, the pre-buried one block of steel of top center using customization steel form
Plate；Yellow black reflectorised paint striped is painted after completing, and according to number order using forklift transport to construction site；
（3）Steel pipe post unit workshop processes
D500 steel pipe post units carry out Mechanized Processing using workshop, to ensure that steel pipe post element solder quality and blanking are long
Degree is accurate, steel pipe post material selection D500*10mm seamless steel pipes, and steel pipe top and bottom weld size are 55*55*
4 brackets are arranged with steel pipe post angled posi-tion in 2cmQ345 steel plates, steel plate, and in installation bridging corresponding position according to drawing
Design welding bridging connects bracket；Through carrying out the yellow black reflectorised paint striped of painting, and root to steel pipe post unit after the assay was approved
It is transported according to number order spare to construction site；
（4）Bridging unit makes processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging carries out making processing using 14# channel steels,
Antirust paint is painted outside bridging, and is transported according to number order spare to construction site；
（5）Transverse distribution beam element system is processed
Transverse distribution beam element is made using 45# Two bors d's oeuveres I-steel, to 45# I-steel carry out Two bors d's oeuveres welding, i.e., two
Root I-steel welds together side by side, and transverse distribution beam element system is made；
（6）Elevation adjusts the processing of sand bucket unit system
Bucket column is processed using seamless steel pipe on elevation adjustment sand bucket, and 10mm thickness Q345 steel plates is used in combination to carry out in welding closure
End；Lower bucket column is processed using seamless steel pipe, and thickness 15mmQ345 steel plates is used in combination to carry out closure lower end；Upper bucket column is inserted into lower bucket column
It is interior；Lower bucket column bottom screws in two D25mm bolts as sand outlet in symmetric position；
（7）Longitudinal girder unit processing
Longitudinal girder unit is using 50# I-steel as lower layer's bottom girder, and 50# I-steel top is every a spacing piece steel of 1 meter of welding
Pipe upright bar, steel tube poles top welding 12.6# I-steel are used as the longitudinal distribution beam in top；To every longitudinal girder unit respectively into
Row number and transport according to number order arrange spare to construction site；
（8）Strip footing prefabricated unit is installed
（8-1）Go out the corresponding position that every row's strip footing is installed on road surface according to Design Requirement Drawing surveying and locating；
（8-2）After determining installation site, it is laid with two layers of geotextiles in the corresponding installation site of strip footing, prevents leveling mortar to original
Asphalt concrete pavement pollutes；
（8-3）According to corresponding drawing number, assembling is carried out respectively to prefabricated strip footing prefabricated unit reference numeral
Installation；Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling；
（8-4）Strip footing top surface pre-embedded steel slab elevation is measured in time after installation is complete and is met, measurement meet it is errorless after
It can carry out the assembling installation of next unit system；
（9）Steel pipe post unit is installed
（9-1）Go out the corresponding position of every steel pipe post unit installation according to layout design position surveying and locating；
（9-2）After determining installation site, the D500 steel pipe posts unit processed is lifted one by one according to number order to corresponding
Position is simultaneously welded and fixed with the pre-buried good steel plate in top in strip footing prefabricated unit；
（9-3）Each D500 steel pipe post unit elevation of top surface and verticality measure and meet in time after installation is complete, measure
Meet errorless and Welding quality test it is qualified after can carry out the assembling installation of next unit system；
（10）Bridging unit is installed
（10-1）D500 steel pipe posts installation is complete through measure meet it is errorless after carry out bridging support installation；
（10-2）The bridging processed is lifted between each two D500 steel pipe posts, four foot of bridging after good position is adjusted
The connection bracket reserved with D500 steel pipe post units is welded and fixed；
（10-3）Installation is complete that the dress of next unit system can be carried out after examining welding quality no problem for bridging unit
It is installed with changing；
（11）Transverse distribution beam element system is assembled
（11-1）Bridging unit carries out the installation of 45# Two bors d's oeuveres I-steel transverse distribution beams after installation is complete；
（11-2）First D500 steel pipe need to be measured using steel ruler in transverse distribution beam sides according to layout design position before lifting
The center of column, with facilitate lifting after can accurately be placed into corresponding position；
（11-3）After the completion of the lifting of transverse distribution beam, transverse distribution beam is weldingly fixed on steel pipe post unit top, immediately to cross
It measures and meets to distribution beam plan-position and design altitude；
（11-4）Transverse distribution beam and each D500 steel pipe posts unit contact position both sides are welded after measurement review is errorless
Bracket limited block, is reinforced；
（11-5）After the completion of welding bracket limited block, next cell cube can be carried out after examining welding quality to meet the requirements
The installation of system；
（12）Elevation adjusts the installation of sand bucket unit
（12-1）Transverse distribution beam goes out each elevation after installation is complete, according to the setting-out of layout design position and adjusts setting for sand bucket unit
Position is counted, and draws cross hairs and carries out position mark；
（12-2）On transverse distribution beam, Installation Elevation adjustment sand bucket unit is carried out one by one according to mark position, installation is complete
Each sand bucket and transverse distribution beam are welded and fixed afterwards, to prevent sand bucket from shaking during adjusting elevation, shadow
Ring the accuracy of elevation adjustment data；
（12-3）After the completion of elevation adjustment sand bucket installation is fixed, sand bucket carries out sand loading one by one, and level is utilized during sand loading
Instrument adjusts sand bucket to design altitude；
（12-4）The adjustment of sand bucket elevation completes that the installation of next unit system can be carried out after measurement review is errorless；
（13）Longitudinal girder unit installation
（13-1）Elevation adjusts sand bucket after installation is complete, and longitudinal girder unit lifting is carried out according to the corresponding number order of layout design
Construction；Longitudinal girder is placed on above sand bucket, and is welded and fixed with sand bucket；
（13-2）Adjacent two longitudinal girders are attached at both ends using 12.6# I-steel；
（13-3）All longitudinal girder units will after installation is complete, penetrate between the steel tube poles of every longitudinal girder elongated
Lateral steel pipe, be attached using the steel tube poles of the longitudinal girder unit of fastener and every, to increase longitudinal girder unit
Overall stability and safety；
（14）Entirety of inspecting for acceptance assembly situation
Whole assembling measures longitudinal girder unit elevation of top surface meet first after installation is complete, it is ensured that measures review
As a result errorless；Then whole pads during door opening Standard installation across high speed to entirety carry out welding quality
It checks, on inspection after acceptance(check), across fast chamber beam structure construction can be carried out；
（15）Remove across high speed door opening structure
After the completion of waiting for across high speed variable cross-section curved box girder construction, Demolition Construction is carried out to across high speed door opening structure, structural demolition is applied
Work is constructed with installation process inverted sequence；Construction process is as follows：It removes longitudinal girder unit → dismounting elevation and adjusts sand bucket unit
→ remove transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe posts unit → dismounting strip footing
Prefabricated unit → cleaning construction site → recovery highway normal pass.
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| CN201810272032.5A CN108517779B (en) | 2018-03-29 | 2018-03-29 | Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder |
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| CN201810272032.5A CN108517779B (en) | 2018-03-29 | 2018-03-29 | Across the high speed door opening assembling Method for Installation of low clearance variable cross-section curved box girder |
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| CN110820568A (en) * | 2019-10-22 | 2020-02-21 | 中国一冶集团有限公司 | Method for mounting bailey truss of small-radius curve box girder bridge |
| CN113914224A (en) * | 2021-10-18 | 2022-01-11 | 北京城乡建设集团有限责任公司 | Installation method of cross-lane construction support |
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| CN113914224A (en) * | 2021-10-18 | 2022-01-11 | 北京城乡建设集团有限责任公司 | Installation method of cross-lane construction support |
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| CN108517779B (en) | 2019-08-23 |
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