CN108517779B - 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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- CN108517779B CN108517779B CN201810272032.5A CN201810272032A CN108517779B CN 108517779 B CN108517779 B CN 108517779B CN 201810272032 A CN201810272032 A CN 201810272032A CN 108517779 B CN108517779 B CN 108517779B
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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 invention, it is characterised in that: whole assembly across the high speed door opening structure of situation → dismounting the following steps are included: the 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 installation of sand bucket unit → longitudinal direction girder unit is installed → is inspected for acceptance.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.The accuracy and safety in turn ensuring door opening structure simultaneously reach quick construction, energy conservation, good result efficiently, safe, there is promotional value.
Description
Technical field
The invention belongs to roads, bridge field, 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 technique
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
Door opening superstructure can not be using in the case where full framing, and the high process control requirement of door opening structural top will be 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
The security risk of vehicle on highway piggybacking traveling can be greatly reduced in this guaranteed shorter construction period.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 certain waste to construction material.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, accurately, energy conservation, high quality across the high speed door opening structure construction of carry out low clearance variable cross-section curved box girder become it is urgently to be resolved
The problem of.
Summary of the invention
The present invention is to make up the deficiencies in the prior art, provide it is a kind of safely, quickly, accurately, 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 invention, it is characterised in that: including with
Lower step:
Preparation of construction → strip footing prefabricated unit processing → steel pipe post unit processing → bridging unit processing → cross
It is pre- to distribution beam unit system processing → elevation adjustment sand bucket unit system processing → longitudinal direction girder unit processing → strip footing
Unit installation processed → steel pipe post unit installation → bridging unit installation → transverse distribution beam element system assembly → elevation tune
Whole 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 invention, including step in detailed below:
(1) preparation of construction
The construction of across high speed variable cross-section curved box girder two sides pier stud is completed, and acceptance(check)；
(2) strip footing prefabricated unit is processed
Prefabricated processing strip footing prefabricated unit, strip footing are carried out according to strip footing prefabricated unit detailed construction figure
Prefabricated unit is C30 reinforced concrete structure, and structure is prefabricated to carry out prefabricated, top center pre-buried one using customization steel form
Block steel 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 unit using workshop carry out Mechanized Processing, with guarantee steel pipe post element solder quality and under
Expect that length is accurate, steel pipe post material selection D500*10mm seamless steel pipe, steel pipe top and bottom weld size are 55*55*
4 brackets are arranged in 2cmQ345 steel plate, steel plate and steel pipe post angled posi-tion, and in installation bridging corresponding position according to drawing
Design welding bridging connects bracket；The yellow black reflectorised paint striped of painting, and root are carried out to steel pipe post unit after the assay was approved
It is transported according to number order spare to construction site；
(4) bridging unit production processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging is made of 14# channel steel
Antirust paint is painted in processing 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, carries out Two bors d's oeuveres welding to 45# I-steel,
I.e. two I-steel weld together side by side, and transverse distribution beam element system is made；
(6) elevation adjustment sand bucket unit system processing
Bucket column is processed using D133*10mm seamless steel pipe on elevation adjustment sand bucket, and with 10mm thickness Q345 steel plate into
Row welding blocks upper end；Lower bucket column is processed using D159*10mm seamless steel pipe, and is blocked with thickness 15mmQ345 steel plate
Lower 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
For longitudinal girder unit using 50# I-steel as lower layer's bottom beam, 50# I-steel top welds one every 1 meter of spacing
Root steel tube poles, steel tube poles top welding 12.6# I-steel are used as the longitudinal distribution beam in top；To every longitudinal girder unit point
Be not numbered and transport to construction site arrange according to number order it is spare；
(8) strip footing prefabricated unit is installed
(8-1) goes out the corresponding position that every row's strip footing is installed on road surface according to Design Requirement Drawing surveying and locating；
After (8-2) determines installation site, it is laid with two layers of geotextiles in the corresponding installation site of strip footing, prevents leveling mortar
Protobitumen concrete road surface is polluted；
(8-3) fills prefabricated strip footing prefabricated unit reference numeral according to corresponding drawing number respectively
It is installed with changing；Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling, or be welded by embedded bar
To connect two pieces of adjacent strip footings；
(8-4), which in time measures strip footing top surface pre-embedded steel slab elevation after being installed, to be met, and measurement meets nothing
The assembling installation of next unit system can be carried out after accidentally；
(9) steel pipe post unit is installed
(9-1) goes out the corresponding position of every steel pipe post unit installation according to layout design position surveying and locating；
After (9-2) determines installation site, the D500 steel pipe post unit processed is lifted according to number order one by one to
Corresponding position is simultaneously welded and fixed with the pre-buried good steel plate in top in strip footing prefabricated unit；
(9-3) is installed rear each D500 steel pipe post unit elevation of top surface and verticality in time and measures and meet,
Measurement 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 post be installed through measurement meet it is errorless after carry out bridging support installation；
(10-2) lifts the bridging processed between every two D500 steel pipe post, adjusts bridging after good position
The connection bracket that four feet have been reserved with D500 steel pipe post unit is welded and fixed；
(10-3) bridging unit, which is installed, can carry out next unit system after examining welding quality no problem
Assembling installation；
(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 beam after being installed；
First D500 need to be measured using steel ruler in transverse distribution beam sides according to layout design position before (11-2) lifting
The center of steel pipe post, with facilitate lifting after can accurately be placed into corresponding position；
After the completion of the lifting of (11-3) transverse distribution beam, transverse distribution beam is weldingly fixed on steel pipe post unit top, immediately
Transverse distribution beam plan-position and design altitude are measured and met；
(11-4) is after measurement review is errorless to transverse distribution beam and each D500 steel pipe post unit contact position two sides
Bracket limited block is welded, is reinforced；
After the completion of (11-5) welds bracket limited block, next list can be carried out after examining welding quality to meet the requirements
The installation of first system；
(12) elevation adjustment sand bucket unit installation
After (12-1) transverse distribution beam is installed, each elevation is gone out according to the setting-out of layout design position and adjusts sand bucket unit
Design position, and draw cross hairs carry out position mark；
(12-2) carries out Installation Elevation adjustment sand bucket unit, installation one by one on transverse distribution beam, according to mark position
Each sand bucket and transverse distribution beam are welded and fixed after the completion, to prevent sand bucket from shaking during adjusting elevation
It is dynamic, influence the accuracy of elevation adjustment data；
After the completion of the adjustment sand bucket installation of (12-3) elevation is fixed, sand bucket carries out sand loading one by one, and utilizes during sand loading
Level adjusts sand bucket to design altitude；
The installation that the adjustment of (12-4) sand bucket elevation completes to carry out next unit system after measurement review is errorless is applied
Work；
(13) longitudinal girder unit installation
After (13-1) elevation adjustment sand bucket is installed, longitudinal girder unit is carried out according to the corresponding number order of layout design
Lifting construction；Longitudinal girder is placed on above sand bucket, and is welded and fixed with sand bucket；
Adjacent two longitudinal girders are attached by (13-2) using 12.6# I-steel at both ends；
After whole longitudinal girder units are installed by (13-3), penetrated between the steel tube poles of every longitudinal girder
Elongated lateral steel pipe is attached using the steel tube poles of fastener and every longitudinal girder unit, to increase longitudinal girder list
The overall stability and safety of member；
(14) entirety of inspecting for acceptance assembly situation
After whole assembling is installed, longitudinal girder unit elevation of top surface is measured meet first, it is ensured that measurement
It is errorless to check result；Then whole pads during door opening Standard installation across high speed to entirety weld
Quality examination on inspection after acceptance(check), can carry out across fast chamber beam structure construction；
(15) across high speed door opening structure is removed
After the completion of the construction of across high speed variable cross-section curved box girder, Demolition Construction is carried out to across high speed door opening structure, structure is torn open
Except construction is constructed with installation process inverted sequence；Construction process is as follows: removing longitudinal girder unit → dismounting elevation and adjusts sand bucket
Unit → dismounting transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe post unit → dismounting bar shaped
Basic 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 batch production and specialized processing, each unit system early period to each separate unit system split
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 driving 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 whole design to across high speed door opening structure and carry out mechanical analysis, and whole 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 be with strict 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 conservation, good result efficiently, safe.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 route
(Feng huangshan Mountain to south is around city section) second bid section application of constructing, 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 and bottom surface elevation after the completion of across high speed door opening assembling Method for Installation construction " construction
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.
Detailed description of the invention
Fig. 1 is workflow schematic diagram of the 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 beams, 15 tops
Longitudinal distribution beam, 16 bracket limited blocks.
Specific embodiment
Attached drawing is a kind of specific embodiment of the invention.
Construction method of the invention, according to construction drawing design and construction on-site actual situations, to across high speed door opening structure
Whole design is carried out, structural model is established using Midas's software and carries out mechanical analysis, design is calculated by precision and 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.
After each separate unit system completes the process and is qualified by inspection, 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.
Measurement review will in time, accurately in assembling installation process.
Assembling will check assembling installation situation in time after being installed, guarantee prefabricated construction quality.
Door opening can add row's strip footing among road including the strip footing 1 positioned at surface road two sides, 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.A transverse distribution beam 5 is welded on the top of every row's steel pipe post, i.e., the direction of transverse distribution beam is along landing ground
The length direction of road.Several elevations adjustment sand bucket 6 is alongst welded and fixed in the upper surface of transverse distribution beam.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 is adopted including lower layer's bottom beam 14, top longitudinal direction distribution beam 15 and the steel tube poles 11 welded together
With 50# I-steel as lower layer's bottom beam, lower layer's bottom beam 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 invention, comprising the following steps:
(1) preparation of construction
1), across high speed door opening structure construction relates to high speed formality all examination & approval completions；
2), across high speed variable cross-section curved box girder two sides pier stud construction is completed, and through management acceptance(check)；
3), material is ready for complete, meets construction requirement through live retrial；
(2) strip footing prefabricated unit is processed
Prefabricated processing strip footing prefabricated unit, strip footing are carried out according to strip footing prefabricated unit detailed construction figure
Prefabricated unit is C30 reinforced concrete structure, 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 plate 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 unit workshop processes
D500 steel pipe post unit using workshop carry out Mechanized Processing, with guarantee steel pipe post element solder quality and under
Expect that length is accurate, steel pipe post material selection D500*10mm seamless steel pipe, steel pipe top and bottom welding steel are having a size of 55*
4 brackets are arranged in 55*2cmQ345 steel plate, steel plate and steel pipe post angled posi-tion, and in installation bridging corresponding position according to figure
Paper design welding bridging connects bracket.
D500 steel pipe post unit is constructed when processing in strict accordance with unit construction drawing, butt welding contact after the completion of welding
Carry out detection flaw detection, it is ensured that welding quality problems.The yellow black reflectorised paint of painting is carried out to steel pipe post unit after the assay was approved
Striped, and transported according to number order spare to construction site.
(4) bridging unit production processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging is using 14# channel steel in processing cart
Between carry out production processing, to guarantee that welding quality and cutting length are accurate.In strict accordance with unit when bridging unit is processed
Construction drawing is constructed, and butt welding contact carries out detection flaw detection after the completion of welding, it is ensured that vertical to steel pipe after welding quality problems
Pole unit 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# work in machining shed
Word steel carries out Two bors d's oeuveres welding, i.e. two I-steel weld together side by side, and is welded 45# Two bors d's oeuveres I-steel using zigzag notch
It is connected into the transverse distribution beam element system that length is 27 meters, butt welding contact carries out detection flaw detection after the completion of welding, it is ensured that welding
It is transported after quality problems spare to construction site.
(6) elevation adjustment sand bucket unit system processing
Elevation adjusts sand bucket unit and carries out production processing in processing workshop according to layout design size, to guarantee welding quality
And cutting length is accurate.Elevation is adjusted bucket column on sand bucket and is processed using D133*10mm seamless steel pipe, and with 10mm thickness diameter
133mm steel plate carries out welding and blocks upper end, and lower bucket column is processed using D159*10mm seamless steel pipe, adjusts sand bucket upper steel plate
Welding is carried out using 220*220*10mmQ345 steel plate and blocks lower end, lower steel plate is sealed using 250*250*15mmQ345 steel plate
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 completes the process
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 beam, and 50# I-steel top is every 1 meter of spacing
1 φ 48mm × 3.5mm steel pipe is set as upright bar and is welded with 50# I-steel, 12.6# I-steel is welded at the top of upright bar
As 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 production 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 measurement meet errorless and Welding quality test it is qualified after, to every longitudinal girder unit respectively into
Row number and transport arrange according to number order spare to construction site.
(8) strip footing prefabricated unit is installed
(1) corresponding position that every row's strip footing is installed on road surface is gone out 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 pair
Protobitumen concrete road surface pollutes；
(3) according to corresponding drawing number, prefabricated strip footing prefabricated unit reference numeral is assembled respectively
Change installation.Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling, or by embedded bar welding come
Connect two pieces of adjacent strip footings.
(4) strip footing top surface pre-embedded steel slab elevation is measured in time after being installed 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 post unit processed is lifted one by one according to number order to phase
It answers position 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 being installed, and survey
Amount 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
(1) D500 steel pipe post be installed through measurement meet it is errorless after carry out bridging support installation；
(2) bridging processed is lifted between every two D500 steel pipe post, adjusts bridging four after good position
The connection bracket that foot has been reserved with D500 steel pipe post unit is welded and fixed；
(3) bridging unit is installed after examining welding quality no problem the dress that can carry out next unit system
It is installed with changing.
(11) transverse distribution beam element system is assembled
(1) installation of 45# Two bors d's oeuveres I-steel transverse distribution beam is carried out after bridging unit is installed；
(2) first D500 steel need to be measured using steel ruler in transverse distribution beam sides according to layout design position before lifting
The center of tube 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 cross
It measures and meets to distribution beam plan-position and design altitude；
(4) transverse distribution beam and each D500 steel pipe post unit contact position two sides are welded after measurement review is errorless
Bracket limited block 16, is reinforced；
(5) after the completion of welding bracket limited block 16, next list can be carried out after examining welding quality to meet the requirements
The installation of first system.
(12) elevation adjustment sand bucket unit installation
1) after transverse distribution beam is installed, setting for each elevation adjustment sand bucket unit according to the setting-out of layout design position
Position is counted, and draws cross hairs and carries out position mark；
(2) it on transverse distribution beam, carries out Installation Elevation adjustment sand bucket unit one by one according to mark position, is installed
Each sand bucket spot welding is carried out with transverse distribution beam afterwards to fix, to prevent sand bucket from shaking during adjusting elevation, shadow
Ring the accuracy of elevation adjustment data；
(3) after the completion of the installation of elevation adjustment sand bucket 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；
(4) installation that next unit system can be carried out after measurement review is errorless is completed in the adjustment of sand bucket elevation.
(13) longitudinal girder unit installation
(1) after elevation adjustment sand bucket is installed, longitudinal girder unit is carried out according to the corresponding number order of layout design and is hung
Dress construction；Longitudinal girder is placed on above sand bucket, and is welded and fixed with sand bucket；
After (2) the 1st longitudinal girder unit liftings to corresponding position, it is fixed temporarily using I-steel trivet, to
After the completion of 2nd longitudinal main cable and girder, adjacent two longitudinal girders are attached at both ends using 12.6# I-steel；
(3) after being one by one installed whole longitudinal girder units with above-mentioned steps, in the steel of every longitudinal girder
Elongated φ 48mm × 3.5mm transverse direction steel pipe is penetrated between pipe upright bar, utilizes the steel tube poles of fastener and every longitudinal girder unit
It is attached, to increase the overall stability and safety of longitudinal girder unit.
(14) entirety of inspecting for acceptance assembly situation
After whole assembling is installed, longitudinal girder unit elevation of top surface is measured meet first, it is ensured that measurement
It is errorless to check result.Then whole pads during door opening Standard installation across high speed to entirety weld
Quality examination on inspection after acceptance(check), reports supervising engineer to check and accept.Through supervising engineer's acceptance(check) and confirmation of signing, side
It can carry out across fast chamber beam structure construction.
(15) across high speed door opening structure is removed
After the completion of the construction of across high speed variable cross-section curved box girder, Demolition Construction is carried out to across high speed door opening structure, structure is torn open
Except construction is constructed with installation process inverted sequence.Construction process is as follows: removing longitudinal girder unit → dismounting elevation and adjusts sand bucket
Unit → dismounting transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe post unit → dismounting bar shaped
Basic prefabricated unit → cleaning construction site → recovery highway normal pass.
Quality control
3) actual quantities project, is surveyed:
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 deviation is 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 (1)
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: the following steps are included:
Preparation of construction → strip footing prefabricated unit processing → steel pipe post unit processing → bridging unit processing → transverse direction point
Sand bucket unit system processing → longitudinal direction girder unit processing → prefabricated list of strip footing is adjusted with beam element system processing → elevation
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；
Specific step is as follows:
(1) preparation of construction
The construction of across high speed variable cross-section curved box girder two sides pier stud 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 structure, 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 unit carries out Mechanized Processing using workshop, to guarantee that steel pipe post element solder quality and blanking are long
Degree is accurate, steel pipe post material selection D500*10mm seamless steel pipe, and steel pipe top and bottom weld size are 55*55*
4 brackets are arranged in 2cmQ345 steel plate, steel plate and steel pipe post angled posi-tion, and in installation bridging corresponding position according to drawing
Design welding bridging connects bracket；The yellow black reflectorised paint striped of painting, and root are carried out to steel pipe post unit after the assay was approved
It is transported according to number order spare to construction site；
(4) bridging unit production processing
Bridging is exactly the skewed horizontal load on scaffold, scissor, that is, X-shaped bar；Bridging carries out production processing using 14# channel steel,
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, carries out Two bors d's oeuveres welding to 45# I-steel, i.e., and two
Root I-steel welds together side by side, and transverse distribution beam element system is made；
(6) elevation adjustment sand bucket unit system processing
Bucket column is processed using seamless steel pipe on elevation adjustment sand bucket, and is carried out in welding closure with 10mm thickness Q345 steel plate
End；Lower bucket column is processed using seamless steel pipe, and carries out closure lower end with thickness 15mmQ345 steel plate；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 beam, and 50# I-steel top is every a piece steel of 1 meter of spacing 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 arrange according to number order spare to construction site；
(8) strip footing prefabricated unit is installed
(8-1) goes out the corresponding position that every row's strip footing is installed on road surface according to Design Requirement Drawing surveying and locating；
After (8-2) determines 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) carries out assembling according to corresponding drawing number, to prefabricated strip footing prefabricated unit reference numeral respectively
Installation；Two neighboring strip footing will be connected and fixed, and can be fixed by concrete joint filling；
(8-4), which in time measures strip footing top surface pre-embedded steel slab elevation after being installed, to be 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) goes out the corresponding position of every steel pipe post unit installation according to layout design position surveying and locating；
After (9-2) determines installation site, the D500 steel pipe post 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；
After (9-3) is installed, each D500 steel pipe post unit elevation of top surface and verticality measure meet in time, survey
Amount 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 post be installed through measurement meet it is errorless after carry out bridging installation；
(10-2) lifts the bridging processed between every two D500 steel pipe post, adjusts four foot of bridging after good position
The connection bracket reserved with D500 steel pipe post unit is welded and fixed；
(10-3) bridging unit is installed after examining welding quality no problem the dress that can carry out next unit system
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 beam after being installed；
First D500 steel pipe need to be measured using steel ruler in transverse distribution beam sides according to layout design position before (11-2) lifting
The center of column, with facilitate lifting after can accurately be placed into corresponding position；
After the completion of the lifting of (11-3) 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) welds transverse distribution beam and each D500 steel pipe post unit contact position two sides after measurement review is errorless
Bracket limited block, is reinforced；
After the completion of (11-5) welds bracket limited block, next cell cube can be carried out after examining welding quality to meet the requirements
The installation of system；
(12) elevation adjustment sand bucket unit installation
After (12-1) transverse distribution beam is installed, setting for each elevation adjustment sand bucket unit according to the setting-out of layout design position
Position is counted, and draws cross hairs and carries out position mark；
(12-2) carries out Installation Elevation adjustment sand bucket unit one by one on transverse distribution beam, according to mark position, is installed
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；
After the completion of the adjustment sand bucket installation of (12-3) elevation 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；
The installation that next unit system can be carried out after measurement review is errorless is completed in the adjustment of (12-4) sand bucket elevation；
(13) longitudinal girder unit installation
After (13-1) elevation adjustment sand bucket is installed, 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；
Adjacent two longitudinal girders are attached by (13-2) using 12.6# I-steel at both ends；
After whole longitudinal girder units are installed by (13-3), penetrated 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
After whole assembling is installed, longitudinal girder unit elevation of top surface is measured meet first, it is ensured that measurement 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) across high speed door opening structure is removed
After the completion of the construction of across high speed variable cross-section curved box girder, 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: removing longitudinal girder unit → dismounting elevation and adjusts sand bucket unit
→ remove transverse distribution beam element system → dismounting bridging unit → dismounting D500 steel pipe post 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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| CN110820568B (en) * | 2019-10-22 | 2021-11-26 | 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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| CN202705921U (en) * | 2012-08-24 | 2013-01-30 | 中国建筑土木建设有限公司路桥分公司 | Assembly type cast-in-place beam passing door opening support |
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| CN202705921U (en) * | 2012-08-24 | 2013-01-30 | 中国建筑土木建设有限公司路桥分公司 | Assembly type cast-in-place beam passing door opening support |
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