CN106087768A - A kind of method of assembled mobile formwork in bridge tunnel narrow short transition time section - Google Patents
A kind of method of assembled mobile formwork in bridge tunnel narrow short transition time section Download PDFInfo
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- CN106087768A CN106087768A CN201610661827.6A CN201610661827A CN106087768A CN 106087768 A CN106087768 A CN 106087768A CN 201610661827 A CN201610661827 A CN 201610661827A CN 106087768 A CN106087768 A CN 106087768A
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- girder
- front leg
- leg strut
- nose
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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
The invention discloses a kind of method of assembled mobile formwork in bridge tunnel narrow short transition time section, at girder bottom welding, track advancing is installed；In basement transition stage segmented assembly girder and connection system, by running gear driving means after reverse operating, along track advancing, assembled one section is slow astern section, until girder all connects, assembly is complete；After girder assembly, i.e. after positive operation, running gear driving means pushing tow mobile formwork forward runs forward, and the installation i.e. completing front leg strut after nose girder via on bridge pier is fixed；Front leg strut is installed after fixing, and continues running gear driving means pushing tow mobile formwork girder via forward after positive operation；During girder via, often move 4m and complete triangle outrigger and plug-in assembly one by one, until being fully completed triangle outrigger and plug-in assembly；After girder via, fixing rear support leg, middle supporting leg and front leg strut are installed respectively on 0# platform, 1# pier, 2# pier, complete mobile formwork via task.
Description
Technical field
A kind of method that the present invention relates to assembled mobile formwork, particularly relates to a kind of assembled in bridge tunnel narrow short transition time section
The method of mobile formwork.
Background technology
The up self-propelled moveable formwork of DSZ32/900 type designs for the construction of special line for passenger trains double-line full span box,
Mould bases uses girder to be placed in bridge floor top structure, utilizes beam-ends, bridge pier to install supporting leg, it is possible to upside-down mounting supporting leg voluntarily, has good
Stability.Mould bases is mainly by girder system, plug-in, transverse-moving mechanism and locking mechanism, outer modular system, rear running mechanism, prop up afterwards
The part groups such as lower limb, middle supporting leg, front leg strut, suspension rod, lifting dolly, overhead traveling crane and 5t electric hoist, electric hydraulic system and auxiliary equipment
Become, wherein: girder divides 1# girder, 2# girder, 3# girder three sections, and wherein: 1# girder 12.9m, 2# girder, 3# girder are respectively
12.0m；Nose girder divides 1# nose girder 6,2# nose girder 7,3# nose girder 8 three sections, length 11.0m respectively；Total length reaches 69.9m.Plug-in include
1# is plug-in, 2# is plug-in, 3# is plug-in, 4# is plug-in, 5# is plug-in, 6# is plug-in, 7# is plug-in and 8# is plug-in.
The common assembling method of mobile formwork has two kinds, and one is that after utilizing platform, roadbed is assembled, and another kind is in beam position processed
Assembled.
1, the assembled assembled place of roadbed work generally choosing one section of basic forming at abutment platform tail of roadbed after platform, assembly is substantially
It is divided into two stages, the stage one: mould bases completes main couple on roadbed and supporting leg is installed, and mould bases moves forward to beam position processed；Stage two:
Mould bases, at assembly outrigger in beam position processed, plug-in, external mold, assembles and debugs mould bases hydraulic pressure and electrification systems.Owing to mould bases is the longest
69.9 meters, horizontal main couple is wide 7.6 meters, puts and crane operation space for meeting mould bases, and roadbed assembly place length is no less than
70m, width is no less than 20m.
2, after mobile formwork beam position is assembled with platform, roadbed assembly principle is basically identical, and mould bases faces by setting up in beam position processed
Time buttress, use crane assembled main couple and supporting leg piecemeal, after mould bases is assembled into from steady system, remove temporary rest pier, lifting
Plug-in and template, installs hydra-electric system simultaneously.Most 33 tons are weighed, for meeting large-scale hanging due to mould bases main couple single-unit weight
Dress equipment availability, from safety and cost consideration, this assembling method applies in general to first and pier high shorter place open smooth across landform.
The narrowest for construction site, DSZ32-900 mobile formwork body total length reaches 69.9m, be 13.18m's
Assemble the mobile formwork of 69.9m on roadbed, there are no this type of Project case, when just carrying out construction investigation, be engaged in shifting for many years
The brainstrust of dynamic model frame erecting beam construction is all stymied by.
Summary of the invention
The technical problem to be solved is to provide the narrow at bridge tunnel of a kind of simple to operate, safe and reliable, low cost
The method of assembled mobile formwork in short transition time section.
In order to solve above-mentioned technical problem, the side of assembled mobile formwork in bridge tunnel narrow short transition time section that the present invention provides
Method, is characterized in that: install track advancing at girder bottom welding, and its position, physical dimension guide rail existing with nose girder are identical；?
Basement transition stage segmented assembly girder and connection system, by running mechanism driving means after reverse operating, assembled along track advancing
One section i.e. slow astern section, carries out the assembly of next sections, until girder all connects, assembly is complete with assembled place of soaring；Main
After beam assembly, i.e. after positive operation, running mechanism driving means pushing tow mobile formwork forward runs forward, at nose girder via
After on bridge pier, i.e. complete the installation of front leg strut fix；Front leg strut is installed after fixing, and after continuing positive operation, running mechanism drives
Device pushing tow mobile formwork girder via forward；During girder via, often move 3.8m～4.2m and complete triangle one by one and choose
Beam and plug-in assembly, until being fully completed triangle outrigger and plug-in assembly；After girder via, respectively at 0# platform, 1#
Fixing rear support leg, middle supporting leg and front leg strut are installed on pier, 2# pier, complete mobile formwork via task.
The concrete step of the present invention is poly-as follows:
(1) site planning
In narrow construction area, divide according to function, Liang Ge crane district, 1 haulage vehicle park and 1 assembly
District, the leveling compacting of each region roadbed；
Build-up area is mainly to implement region, before mobile formwork installation is in place, build-up area surface is used concrete hardening
Processing, its absolute altitude and abutment end face, inverted arch face, tunnel are maintained in a gradient；
(2) set up temporary rest pier
Temporary rest pier uses four steel pipe supports to set up, and according to the forward and backward height of landing leg of mobile formwork, scaffolding height selects
It is selected as 1.9m, between adjacent steel pipe support, uses channel-section steel bridging and horizontal brace connection, bracing members plan vertical girder direction, both sides
Lay Two bors d's oeuveres I-steel；
(3) bridge tunnel changeover portion mobile formwork assembly step and method
The first step, the installation in place of 1# girder and track advancing welding
1. the installation of first paragraph girder is in place the most crucial: 1# girder 1 initially lifts on-station position and gos deep into 5m in tunnel；
2. set up the first temporary rest pier and the second temporary rest pier, in order to increase track advancing weld length, make 1# girder to the greatest extent
Amount backward more moves back a bit, provides fabricating yard, by second temporary rest pier side work near tunnel for 2# girder is in place more as far as possible
Word gooseneck is cancelled, and changes into respectively installing an oil top at arranged on left and right sides steel pipe post top, on the one hand increases track advancing welding
Length, on the other hand after 1# girder assembly completes, lifts with rear support leg cooperation, is fallen uniformly by the 1# girder after assembly
In the groove of the travelling wheel entering the upper framework of front leg strut；
3. crane is used left and right for 1# girder installation to be put in place and after middle extension bar part and binder install, bottom 1# girder
Track advancing is welded in position corresponding to nose girder guide rail, and first paragraph track advancing weld length is 7m；
4. use crane that rear walking mechanism and rear support leg are installed, and in tunnel, lay retrogressing rail, as rear traveling
Mechanism retreats the track of traveling；The upper framework of front leg strut is mounted and fixed at tunnel face, strictly presses track advancing spacing control
Make the upper framework spacing of left and right front leg strut, it is ensured that the upper framework of front leg strut is fully engaged with between track advancing, utilizes front leg strut
Via principle, realizes the spelling of mobile formwork by the relative displacement on the upper framework of front leg strut of the track advancing of Main Girder Welding
Dress retreats, and the upper framework of front leg strut maintains static；
Second step, 1# girder are given up the throne
1. by the oil top synchronization lifting on operation rear support leg and the second temporary rest pier, the first temporary rest pier is removed, it is ensured that
The upper framework of rear running mechanism and front leg strut the most fully falls in rail groove, then removes the second temporary rest pier, through checking computations, props up in the past
The upper framework of lower limb is fulcrum, and forward and backward girder is in poised state；
2., after 1# girder falls beam, running mechanism driving means after reverse operating, traction 1# girder is overall to be retreated in tunnel
Mobile, the upper framework of front leg strut remains stationary, and strictly monitors the upper framework front end of front leg strut before track advancing time mobile
The relative position of end, when track advancing is close to the upper framework front position of front leg strut, stops retreating operation；
3rd step, the installation in place of 2# girder
Lifting 2# girder is in place, completes to connect the para-position of system, assembly, connection between 1# girder, 2# girder and beam；
4th step, 2# girder track advancing weld
1. along extending welding track advancing at the bottom of 2# girder beam to 2# girder 2 beam-ends, position, physical dimension are complete with 1# girder
Identical；
2. running mechanism driving means after reverse operating, by phase para-position between the upper framework wheel shaft of front leg strut with track advancing
Moving, traction 1# girder, 2# girder connector retreat in tunnel, until 2# girder front end and the upper framework front end pair of front leg strut
Together, fallback procedures strengthens monitoring；
3. balance inspection is calculated: disclosure satisfy that the requirement of balance；
Step 5, the installation in place of 3# girder
Lifting 3# girder is in place, completes 2# girder, the docking of 3# girder, assembly, connection and 3# girder and connects the peace of binder
Fill in place；
Step 6,3# girder track advancing connection guide rail
Along extending welding track advancing at the bottom of 3# girder beam, and it is connected with the existing guide rail in 3# girder front end, position, geometry
Size is identical with the track advancing of 1# girder, 2# girder；
Step 7,3# girder are given up the throne
1. running mechanism driving means after reverse operating, relative with between track advancing by the wheel shaft of the upper framework of front leg strut
Displacement, traction 1# girder, 2# girder, 3# girder connector retreat in tunnel, until track advancing and existing rail attachment point
Aliging with the upper framework front end of front leg strut, fallback procedures strengthens monitoring；
2. after giving up the throne, supporting leg in installing by mobile formwork；
Step 8, installation 1# nose girder
1. use crane lifting 1# nose girder in place, complete 3# girder, the docking of 1# nose girder, assembly, connection and 1# nose girder even
Connect the installation being in place；
2. after reverse operating, running mechanism draws 1# girder, 2# girder, 3# girder and 1# nose girder connector along nose girder guide rail
Move in tunnel, until the upper framework front end of 1# nose girder 4 front end alignment front leg strut 8；
Step 9, installation 2# nose girder
1. lifting 2# nose girder is in place, completes 1# nose girder, the docking of 2# nose girder, assembly, connection and 2# nose girder and connects the peace of system
Fill in place；
2. after reverse operating, running mechanism traction 1# girder, 2# girder, 3# girder and 1# nose girder, 2# nose girder connector edge are led
Beam guide rail retreats mobile in tunnel, until the upper framework front end of 2# nose girder front end alignment front leg strut；
Step 10, installation 3# nose girder and overhead traveling crane
1. lifting 3# nose girder is in place, completes 1# nose girder, 2# nose girder, the docking of 3# nose girder, assembly, connection and 3# nose girder and connects
The installation of system is in place；
2. use crane that mobile formwork top overhead traveling crane is installed in place；
Step 11, front leg strut upper framework preposition
1. put down rear support leg and the oil cylinder of middle supporting leg, by adjusting rear support leg and the lowering or hoisting gear of middle supporting leg, by assembled,
The mobile formwork beam body upwards jack-up connected, conveniently removes the upper framework lifting job of temporary rest pier and front leg strut；
2. remove the first temporary rest pier and the second temporary rest pier, with overhead traveling crane, the upper framework handling of front leg strut is moved forward, be placed in
Abutment, at breastwork, is fixed after adjusting spacing, adjusts simultaneously and lays retrogressing rail；
3. supporting leg and the oil cylinder of rear support leg during synchronous reduces, beam body front slideway uniformly falls into the upper framework of front leg strut
Wheel axial trough in；In behind rear end, the wheel shaft of running mechanism falls into the groove retreating rail, and front and back by the upper framework of front leg strut and
Rear running mechanism bears beam body load, the oil cylinder of middle supporting leg and rear support leg and shrinks unsettled；
Step 12, nose girder via
1. running mechanism after positive operation, pushing tow mobile formwork beam body moves forward along nose girder guide rail, starts nose girder via
Mobile, until middle supporting leg moves to abutment breastwork, stop reach；
2. start rear support leg and the oil cylinder hydraulic device of middle supporting leg, rear support leg and middle supporting leg land fixing, to bear movement
Mould bases beam body whole load；
Step 13, installation front leg strut
After bridge pier installs and fixes the lower framework of front leg strut, the upper framework of overhead traveling crane handling front leg strut is used to arrive along nose girder
On bridge pier, with the connection of the lower framework of front leg strut, it is achieved the installation of front leg strut is in place, complete nose girder head hole via；
Step 14, girder via and plug-in installation
1., after adjusting after walking rails, the oil cylinder shrinking rear support leg and middle supporting leg is in vacant state, and beam body load is by front
Supporting leg and rear running mechanism undertake；
2. running mechanism after starting, thrust beam body moves forward, and girder starts via；
3. move forward, be specifically as the criterion with on-the-spot external position, when possessing the lifting plug-in condition of 8#, before girder stops
Move, start to lift that 8# is plug-in and triangle outrigger；
4. moving forward, when possessing the lifting plug-in condition of 7#, girder stops reach, starts to lift that 7# is plug-in and triangle is chosen
Beam；
5. moving forward, when possessing the lifting plug-in condition of 6#, girder stops reach, starts to lift that 6# is plug-in and triangle is chosen
Beam；According to said method, until completing all plug-in lifting operations；
Step 15, complete whole via
In completing on bridge pier, supporting leg installs and fixes, and falls middle supporting leg and rear support leg, is respectively supported at bridge pier and abutment
On, shrink front leg strut, front leg strut handling to 2# bridge pier is installed, is fixed, completes mobile formwork whole via task by application overhead traveling crane,
Initially enter beam operation processed.
Using the method for assembled mobile formwork in bridge tunnel narrow short transition time section of technique scheme, it is technically characterized by comprising the steps as follows:
1, possessing lifting and depositing under beam, traffic condition, by adjust welding section length, mobile front leg strut upper framework and
Welding track advancing sequencings etc., the present invention can be applied to the bridge tunnel transition length any length more than 3.0m and move mould
Frame is assembled；
2, in the present invention is suitable for straight tunnel, mobile formwork retreats consolidation service, for curved tunnel, and should be by measuring
Determine whether curved section possesses the condition that mobile formwork straight line retreats；
3, the successful Application of the present invention, successfully solves asking of the assembled via in place of narrow bridge tunnel changeover portion mobile formwork
Topic, has expanded the range of application of mobile formwork, and the organization arrangement for setting a roof beam in place in complicated topographical conditions ground section of railway track system provides and borrows
Mirror, is adapted to the construction that works to tight deadlines that mountain area system is set a roof beam in place very much；
4, the present invention only relies on mobile formwork front leg strut upper framework and sets up track advancing on girder and i.e. solve movement
Mould bases retreats the problem of traveling, simple to operate, safe and reliable, reduces equipment investment cost, has not only saved cost, energy-conservation
Reduce discharging and environmental conservation aspect effect is the most fairly obvious.
In sum, the present invention is a kind of simple to operate, safe and reliable, assembly in bridge tunnel narrow short transition time section of low cost
The method of mobile formwork.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Fig. 2 is the structural representation of mobile formwork.
Fig. 3 is the site planning schematic diagram of the present invention.
Fig. 4 is the structural representation of the temporary rest pier of the present invention.
Fig. 5 is the installation in place of 1# girder and track advancing welding schematic diagram.
Fig. 6 is that girder welds schematic diagram with track advancing.
Fig. 7 is that 1# girder is given up the throne schematic diagram.
Fig. 8 is 2# girder scheme of installation in place.
Fig. 9 is that 2# girder track advancing welds schematic diagram.
Figure 10 is 3# girder scheme of installation in place.
Figure 11 is that 3# girder track advancing connects guide rail schematic diagram.
Figure 12 is that 3# girder is given up the throne schematic diagram.
Figure 13 is to install 1# nose girder schematic diagram.
Figure 14 is to install 2# nose girder schematic diagram.
Figure 15 is to install 3# nose girder and overhead traveling crane schematic diagram.
Figure 16 is the preposition schematic diagram of upper framework of front leg strut.
Figure 17 is nose girder via schematic diagram.
Figure 18 is to install front leg strut schematic diagram.
Figure 19 is girder via and plug-in installation first step schematic diagram.
Figure 20 is girder via and plug-in installation second step schematic diagram.
Figure 21 is girder via and plug-in installation schematic diagram.
Figure 22 has been whole via schematic diagrams.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Under the railway of cloud osmanthus, Bridge Pier abutment body average pier height in dam has exceeded 54.3m, according to Design of Construction Organization and scheme requirement, under
Dam bridge uses the cast-in-place beam processed of DSZ32-900 mobile formwork.
Changeover portion roadbed only 7.46m between the bridge tunnel of bridge little mileage direction, lower dam, abutment length 5.72m, road platform combined length
13.18m；Between the bridge tunnel of big mileage direction, changeover portion (containing abutment) is less than 10m.Therefore beam scheme mileage direction from childhood processed is to big mileage side
To carrying out, i.e. mobile formwork assembly place election is positioned in lower dam bridge and tunnel narrow short transition time section.Due to construction site very
Narrow, DSZ32-900 mobile formwork body total length reaches 69.9m, will assemble the mobile mould of 69.9m on the roadbed of 13.18m
Frame, there are no this type of Project case, when just carrying out construction investigation, is engaged in the brainstrust of mobile formwork erecting beam construction for many years all
It is stymied by.
By job site is investigated repeatedly, to tunnel physical dimension and and mobile formwork fuselage physical dimension carry out
Comparison repeatedly, creative proposing carries out the method for assembled mobile formwork in bridge tunnel narrow transition section, and succeed should
With.
See Fig. 2, DSZ32/900 up self-propelled moveable formwork of type to construct for special line for passenger trains double-line full span box
And design, mould bases uses girder to be placed in bridge floor top structure, utilizes beam-ends, bridge pier to install supporting leg, it is possible to upside-down mounting supporting leg voluntarily, tool
There is good stability.Mobile formwork is mainly by girder system, plug-in, transverse-moving mechanism and locking mechanism, outer modular system, rear traveling
Mechanism 19, rear support leg 18, middle supporting leg 9, front leg strut 8, suspension rod, lifting dolly, the electric hoist of overhead traveling crane 7 and 5t, electric hydraulic system
And the part composition such as auxiliary equipment, wherein: girder system divides 1# girder 1,2# girder 2 and 3# girder 3 three sections, wherein: 1# girder 1
Long 12.9m, 2# girder and 3# girder be respectively 12.0m；Nose girder divides 1# nose girder 4,2# nose girder 5 and 3# nose girder 6 three sections, and length is divided
Other 11.0m；Total length reaches 69.9m.Plug-in include that 1# is plug-in 10,2# is plug-in 11,3# is plug-in 12,4# is plug-in 13,5# is plug-in 14,6#
Plug-in 15,7# plug-in 16 and 8# plug-in 17.
Lower dam bridge is positioned between two tunnels, and between the bridge tunnel of little mileage direction, changeover portion is 13.18m (containing abutment)；Big mileage
Between the bridge tunnel of direction, changeover portion is less than 10m.For the erection of bridge between tunnel, general employing support cast-in-place method or prefabricated in beam field
After treat that tunnel holing through uses the method such as Bridge Erector erection to carry out bridge erection.Lower dam bridge pier body height is more than 50 meters, up to
To 70 meters, and cloud osmanthus railway is high mountains and precipitous paths, and tunnel cannot be the most through, according to owner's Design of Construction Organization requirement, lower dam bridge
Use mobile formwork cast-in-place construction.The construction of mobile formwork beam is realized, first at the lower dam bridge that execution conditions are the narrowest
The mobile formwork assembled problem at 13.18 meters of bridge tunnel changeover portions will be solved.
Through on-the-spot actual survey with measure, mobile formwork top width 7.6m, with the tunnel clear span of mobile formwork top corresponding height
12.106m, have more than needed 2.253m in both sides；Mobile formwork height (containing track) 4.9m, the vertical corresponding tunnel clear height of two sides
7.952m, height 3.052m more than needed；By relative analysis, possess the condition accommodating mobile formwork in tunnel, but do not possess assembly
Condition；
Between the bridge tunnel of bridge little mileage direction, lower dam, changeover portion is plus the length of abutment, and total length is 13.18 meters, and both sides are shallow
Cutting, can suitably widen, and possesses the condition of crane operation, and roadbed section can possess the condition that mobile formwork is assembled；
Mobile formwork girder often saves a length of 12m (1# girder section 12.9m), and between bridge tunnel, the place of 13.18 meters only possesses one
The assembled condition of section girder.
According to the version of mobile formwork, and on-the-spot actual condition, it is determined that move at the narrow short roadbed transition section of bridge tunnel
Dynamic model frame assembling technique scheme: install track advancing 20 at girder bottom welding, its position, physical dimension is existing with nose girder leads
Rail 21 is identical；In basement transition stage segmented assembly girder and connection system, by running mechanism after reverse operating 19 driving means, edge
Assembled one section of track advancing 20 is slow astern section, carries out the assembly of next sections with assembled place of soaring, until girder all connects
Connect, assembled complete；After girder assembly, i.e. after positive operation, running mechanism 19 driving means pushing tow mobile formwork forward is forward
Running, the installation i.e. completing front leg strut 8 after nose girder via on bridge pier is fixed；Front leg strut 8 is installed after fixing, and continues forward behaviour
Running mechanism 19 driving means pushing tow mobile formwork girder via forward after work；During girder via, often move 4m～4m
Complete triangle outrigger and plug-in assembly one by one, until being fully completed triangle outrigger and plug-in assembly；After girder via,
Fixing rear support leg 18, middle supporting leg 9 and front leg strut 8 are installed respectively on 0# platform, 1# pier, 2# pier, complete mobile formwork via task.
Analyze according to above, will solve to complete 70m mobile formwork assembly problem at the bridge tunnel changeover portion of 13m, first be exactly
Solve the problem that mobile formwork retreats.
Mobile formwork nose girder why can via, it is simply that be mounted with pair of guide rails 22 below nose girder, inside guide rail 22 between
On 4.42m, the travelling wheel of the upper framework that guide rail 22 is placed in front leg strut 8, utilize the guide rail 22 rolling on travelling wheel, thus real
Existing nose girder via.
Solve the problem that girder retreats, it is simply that utilize the principle of nose girder via, at girder bottom welding one section and nose girder
The identical track advancing of guide rail 21 positions and dimensions 20, by the track advancing 20 traveling on the upper framework of front leg strut 8
Wheel and the rear walking mechanism 9 walking on rail, it is achieved the purpose that girder beam body assembly retreats.
Due to assembled narrow space, track advancing 20 can not once weld connection, needs at the construction field (site) according to movement
Mould bases assembly practical situation " segmentation is welded, welds one section of slow astern section, progressively connected with the guide rail 21 of nose girder ", specifically refers to execute
The elaborating of work technological process (it should be noted that this technology during popularization and application, the segmentation weldering of track advancing 20
Spreading degree and transition section length have much relations, and in popularization and application, how segmentation weldering connects long guideway 20, as the case may be
Analyze).Described in conjunction with 13.18m transition section length.
See Fig. 1, the method for assembled mobile formwork in bridge tunnel narrow short transition time section of the present invention, it specifically walks as follows:
(1) site planning
See Fig. 3, in narrow construction area, divide according to function, Liang Ge crane district, 1 haulage vehicle park
And 1 build-up area, the leveling compacting of each region roadbed；
Build-up area is that this achievement mainly implements region, before mobile formwork installation is in place, build-up area surface is used coagulation
Soil cure process, its absolute altitude and abutment end face, inverted arch face, tunnel are maintained in a gradient；
(2) set up temporary rest pier
Seeing Fig. 4, temporary rest pier 23 uses four steel pipe supports to set up, according to the forward and backward height of landing leg of mobile formwork,
Scaffolding height is chosen as 1.9m, uses [10 channel-section steel bridgings and horizontal brace connection, bracing members top, both sides between adjacent steel pipe support
Two bors d's oeuveres 20a I-steel is laid in vertical girder direction；
(3) bridge tunnel changeover portion mobile formwork assembly step and method
The first step, the installation in place of 1# girder and track advancing welding
1. the installation of first paragraph girder is in place the most crucial: too near by abutment 25, one is to increase girder backway, and two are
Will be through repeatedly retreat could be to the enough assembled length of 2# girder 2；Going deep into tunnel 22 can not be too deep, does not possess and hang in tunnel 22
Dress condition, all lifting operations can only complete outside tunnel 22.Therefore, repeatedly verifying through scene, 1# girder 1 just initially lifts
5m in tunnel 22 is goed deep in position, position.
2. set up the first temporary rest pier 231 and the second temporary rest pier 232, in order to increase track advancing 20 weld length, make
1# girder 1 more to move back a bit, provides fabricating yard, by close for the second temporary rest pier 232 for 2# girder 2 is in place more as far as possible
The side I-steel crossbeam in tunnel 22 is cancelled, and changes into respectively installing oil top 233: one sides at arranged on left and right sides steel pipe post top
Face increases track advancing 20 weld length, on the other hand after 1# girder 1 assembly completes, and can be with rear support leg 17 cooperation liter
Fall, in the groove of the travelling wheel that the 1# girder 1 after assembly falls into the upper framework of front leg strut 8 uniformly；
3. crane is used left and right for 1# girder 1 installation to be put in place and after middle extension bar part and binder install, along 1# girder 1 end
Track advancing 20 welds corresponding to the position of nose girder guide rail 21 in portion, and first paragraph track advancing 20 weld length is 7m, as Fig. 5 marks
Shown in, concrete size such as Fig. 6 of welding；
4. use crane that rear walking mechanism 19 and rear support leg 18 are installed, and in tunnel 22, lay retrogressing rail 26, make
The track of traveling is retreated for rear running mechanism 19；The upper framework of front leg strut 8 is mounted and fixed at 22 mouthfuls of tunnel (such as Fig. 5 institute
Show), strictly press track advancing 20 spacing and control the upper framework spacing of left and right front leg strut 8, it is ensured that " upper framework of front leg strut 8 "
Fully it is engaged with between " track advancing 20 ", utilizes front leg strut 8 via principle, by " track advancing 20 " of Main Girder Welding " front
The upper framework of supporting leg 8 " on relative displacement realize the assembled of mobile formwork and retreat (upper framework of front leg strut 8 maintains static).
Second step, 1# girder are given up the throne
1. by oil top 233 synchronization liftings on operation rear support leg 1 and the second temporary rest pier 232, remove first and prop up temporarily
Pier 231, it is ensured that the upper framework of rear running mechanism 19 and front leg strut 8 the most fully falls in rail groove, then removes the second temporary rest pier
232, through checking computations, with the upper framework of front leg strut 8 as fulcrum, forward and backward girder is in poised state；
2., after 1# girder 1 falls beam, running mechanism 19 driving means after reverse operating, traction 1# girder 1 entirety is to tunnel 22
Interior retrogressing moves (upper framework of front leg strut 8 remains stationary), strictly monitors the upper framework front end of front leg strut 8 away from connecing time mobile
The relative position of long track 20 front end, when track advancing 20 is close to the upper framework front position of front leg strut 8, stops retreating operation；
See Fig. 7.
3rd step, the installation in place of 2# girder
As shown in Figure 8, utilizing crane " cantilever technology ", lifting 2# girder 2 is in place, completes 1# girder 1,2# girder 2 and beam
Between connect the para-position of system, assembly, connection.
4th step, 2# girder track advancing weld
1. along extending welding track advancing 20 to 2# girder 2 beam-ends (position, physical dimension and 1# girder 1 at the bottom of 2# girder 2 beam
Identical)；
2. running mechanism 19 driving means after reverse operating, by between the upper framework wheel shaft of front leg strut 8 and track advancing 20
Relative displacement, traction 1# girder 1,2# girder 2 connector retreat in tunnel 22, until 2# girder 2 front end and front leg strut 8 is upper
Aliging in framework front end, fallback procedures strengthens monitoring；
3. balance inspection is calculated: calculate through inspection, resultant couple 143Mpa on the right side of the resultant couple 349Mpa ＞ of left side before retreating, it is possible to meet
Balance requirement (wherein: rear running mechanism 19 is 16t, rear support leg 18 be 2t, 1# girder 1 be 22t, 2# girder 2 be 17t).Ginseng
See Fig. 9.
Step 5, the installation in place of 3# girder
See Figure 10, application crane " cantilever technology ", lifting 3# girder 3 is in place, complete 2# girder 2,3# girder 3 right
Connect, that assembled, connection and 3# girder 3 connect the installation of binder is in place.
Step 6,3# girder track advancing connection guide rail
See Figure 11, along at the bottom of 3# girder 3 beam extend welding track advancing 20, and with the existing guide rail in 3# girder 3 front end 21
Be connected (position, physical dimension are identical with the track advancing 20 of 1# girder 1,2# girder 2)；
Step 7,3# girder are given up the throne
1. running mechanism 19 driving means after reverse operating, by the wheel shaft of the upper framework of front leg strut 8 and track advancing 20
Between relative displacement, traction 1# girder 1,2# girder 2,3# girder 3 connector retreat in tunnel 22, until track advancing 20 with show
Having guide rail 21 junction to align with the upper framework front end of front leg strut 8, fallback procedures strengthens monitoring；
2. after giving up the throne, supporting leg 9 in installing by mobile formwork.See Figure 12.
Step 8, installation 1# nose girder
1. apply crane " cantilever technology ", use crane lifting 1# nose girder 4 in place, complete 3# girder 3,1# nose girder 4 right
Connect, that assembled, connection and 1# nose girder 4 connect the installation of system is in place；
2. after reverse operating, running mechanism 19 draws 1# girder 1,2# girder 2,3# girder 3 and 1# nose girder 4 connector along leading
Beam guide rail moves in tunnel 22, until the upper framework front end of 1# nose girder 4 front end alignment front leg strut 8.See Figure 13.
Step 9, installation 2# nose girder
1. applying crane " cantilever technology ", lifting 2# nose girder 5 is in place, complete 1# nose girder 4, the docking of 2# nose girder 5, assembly,
The installation that connection and 2# nose girder 5 connect system is in place；
2. after reverse operating, running mechanism 19 draws 1# girder 1,2# girder 2,3# girder 3 and 1# nose girder 4,2# nose girder 5 even
Junctor retreats mobile in tunnel 22 along nose girder guide rail, until the upper framework front end of 2# nose girder 5 front end alignment front leg strut 8.See
Figure 14.
Step 10, installation 3# nose girder and overhead traveling crane
1. applying crane " cantilever technology ", lifting 3# nose girder 6 is in place, complete 1# nose girder 4,2# nose girder 5,3# nose girder 6 right
Connect, that assembled, connection and 3# nose girder 6 connect the installation of system is in place；
2. use crane that mobile formwork top overhead traveling crane 7 is installed in place.See Figure 15.
Step 11, front leg strut upper framework preposition
1. rear support leg 18 and the oil cylinder of middle supporting leg 9 are put down, by adjusting rear support leg 18 and the lowering or hoisting gear of middle supporting leg 9, will
Mobile formwork beam body upwards jack-up assembled, that connect, the upper framework handling conveniently removing temporary rest pier and front leg strut 8 is made
Industry；
2. the first temporary rest pier 231 and the second temporary rest pier 232 is removed, with overhead traveling crane 7 by before the upper framework handling of front leg strut 8
Move, be placed in abutment 25 at breastwork, fixed after adjusting spacing, adjust to lay simultaneously and retreat rail 26；
3. supporting leg 9 and the oil cylinder of rear support leg 18 during synchronous reduces, beam body front slideway uniformly falls into the upper of front leg strut 8
In the wheel axial trough of framework；In behind rear end, the wheel shaft of running mechanism 19 falls into the groove retreating rail 26, and front and back by front leg strut 8
Upper framework and rear running mechanism 19 bear beam body load, and oil cylinder and the rear support leg 18 of middle supporting leg 9 shrink unsettled.See Figure 16.
Step 12, nose girder via
1. running mechanism 19 after positive operation, pushing tow mobile formwork beam body moves forward along nose girder guide rail, starts nose girder mistake
Hole is moved, until middle supporting leg 9 moves to abutment 25 breastwork, stops reach；See Figure 17；
2. start rear support leg 18 and the oil cylinder hydraulic device of middle supporting leg 9, rear support leg 18 and middle supporting leg 9 land fixing, to hold
By mobile formwork beam body whole load；
Step 13, installation front leg strut
See Figure 18, after bridge pier 27 installs and fixes the lower framework of front leg strut 8, use overhead traveling crane 7 handling front leg strut 8
Upper framework along nose girder to bridge pier 27 on, with the connection of the lower framework of front leg strut 8, it is achieved the installation of front leg strut 8 is in place, completes nose girder
First hole via；
Step 14, girder via and plug-in installation
See Figure 19, Figure 20 and Figure 21:
1., after adjusting after walking rails, the oil cylinder shrinking rear support leg 18 and middle supporting leg 9 is in vacant state, beam body load by
Front leg strut 8 and rear running mechanism 19 undertake；
2. running mechanism 19 after starting, thrust beam body moves forward, and girder starts via；
3. 4～5m (being specifically as the criterion), when possessing lifting plug-in 10 condition of 8#, girder are moved forward with on-the-spot external position
Stop reach, start to lift 8# plug-in 10 and triangle outrigger；
4. moving forward 4m, when possessing lifting plug-in 11 condition of 7#, girder stops reach, start to lift 7# plug-in 11 and
Triangle outrigger；
5. moving forward 4m, when possessing lifting plug-in 12 condition of 6#, girder stops reach, start to lift 6# plug-in 12 and
Triangle outrigger；According to said method, until completing all plug-in lifting operations；
Step 15, complete whole via
Seeing Figure 22, in completing on bridge pier, supporting leg 9 installs and fixes, and falls middle supporting leg 9 and rear support leg 18, supports respectively
On bridge pier 27 and abutment 25, shrinking front leg strut 8, front leg strut 8 handling is installed to 2# bridge pier 28, is fixed, completes by application overhead traveling crane 7
Mobile formwork whole via task, initially enters beam operation processed.
Claims (2)
1. a method for assembled mobile formwork in bridge tunnel narrow short transition time section, is characterized in that: install at girder bottom welding and connect
Long track, its position, physical dimension guide rail existing with nose girder are identical；In basement transition stage segmented assembly girder and connection system,
By running mechanism driving means after reverse operating, along track advancing, assembled one section is slow astern section, and to soar, assembled place is entered
The assembly of next sections of row, until girder all connects, assembly is complete；After girder assembly, i.e. traveling machine after positive operation
Structure driving means pushing tow mobile formwork forward runs forward, and the installation i.e. completing front leg strut after nose girder via on bridge pier is solid
Fixed；Front leg strut is installed after fixing, and continues running mechanism driving means pushing tow mobile formwork girder via forward after positive operation；?
During girder via, often move 3.8m～4.2m and complete triangle outrigger and plug-in assembly one by one, until being fully completed triangle
Outrigger and plug-in assembly；After girder via, install on 0# platform, 1# pier, 2# pier respectively fixing rear support leg, middle supporting leg and
Front leg strut, completes mobile formwork via task.
The method of assembled mobile formwork in bridge tunnel narrow short transition time section the most according to claim 1, is characterized in that: specifically walk
Poly-as follows:
(1) site planning
In narrow construction area, divide according to function, Liang Ge crane district, 1 haulage vehicle park and 1 build-up area,
The roadbed leveling compacting of each region；
Build-up area is mainly to implement region, before mobile formwork installation is in place, uses concrete hardening to process on build-up area surface,
Its absolute altitude and abutment end face, inverted arch face, tunnel are maintained in a gradient；
(2) set up temporary rest pier
Temporary rest pier uses four steel pipe supports to set up, and according to the forward and backward height of landing leg of mobile formwork, scaffolding height is chosen as
1.9m, uses channel-section steel bridging and horizontal brace connection between adjacent steel pipe support, bracing members plan vertical girder direction, both sides is laid
Two bors d's oeuveres I-steel；
(3) bridge tunnel changeover portion mobile formwork assembly step and method
The first step, the installation in place of 1# girder and track advancing welding
1. the installation of first paragraph girder is in place the most crucial: 1# girder 1 initially lifts on-station position and gos deep into 5m in tunnel；
2. set up the first temporary rest pier and the second temporary rest pier, in order to increase track advancing weld length, make 1# girder as far as possible to
Move back a little more afterwards, as far as possible provide fabricating yard, by second temporary rest pier side I-steel near tunnel for 2# girder is in place more
Crossbeam is cancelled, and changes into respectively installing an oil top at arranged on left and right sides steel pipe post top, on the one hand increases track advancing welding long
Degree, on the other hand after 1# girder assembly completes, lifts with rear support leg cooperation, is fallen into uniformly by the 1# girder after assembly
In the groove of the travelling wheel of the upper framework of front leg strut；
3. crane is used left and right for 1# girder installation to be put in place and after middle extension bar part and binder install, corresponding bottom 1# girder
Weld track advancing in the position of nose girder guide rail, first paragraph track advancing weld length is 7m；
4. use crane that rear walking mechanism and rear support leg are installed, and in tunnel, lay retrogressing rail, as rear running mechanism
Retreat the track of traveling；The upper framework of front leg strut is mounted and fixed at tunnel face, strictly press track advancing spacing control a left side,
The upper framework spacing of right front leg strut, it is ensured that the upper framework of front leg strut is fully engaged with between track advancing, utilizes front leg strut via
Principle, after realizing the assembly of mobile formwork by the relative displacement on the upper framework of front leg strut of the track advancing of Main Girder Welding
Moving back, the upper framework of front leg strut maintains static；
Second step, 1# girder are given up the throne
1. push up synchronization lifting by the oil on operation rear support leg and the second temporary rest pier, remove the first temporary rest pier, it is ensured that after walk
The upper framework of row mechanism and front leg strut the most fully falls in rail groove, then removes the second temporary rest pier, through checking computations, with front leg strut
Upper framework is fulcrum, and forward and backward girder is in poised state；
2. 1# girder falls after beam, running mechanism driving means after reverse operating, traction 1# girder is overall retreat in tunnel mobile,
The upper framework of front leg strut remains stationary, and strictly monitors the upper framework front end of the front leg strut phase away from track advancing front end time mobile
To position, when track advancing is close to the upper framework front position of front leg strut, stop retreating operation；
3rd step, the installation in place of 2# girder
Lifting 2# girder is in place, completes to connect the para-position of system, assembly, connection between 1# girder, 2# girder and beam；
4th step, 2# girder track advancing weld
1. along extending welding track advancing at the bottom of 2# girder beam to 2# girder 2 beam-ends, position, physical dimension phase complete with 1# girder
With；
2. running mechanism driving means after reverse operating, by relative displacement between the upper framework wheel shaft of front leg strut and track advancing,
Traction 1# girder, 2# girder connector retreat in tunnel, until aliging with the upper framework front end of front leg strut in 2# girder front end, after
Process of moving back strengthens monitoring；
3. balance inspection is calculated: disclosure satisfy that the requirement of balance；
Step 5, the installation in place of 3# girder
Lifting 3# girder is in place, completes 2# girder, the docking of 3# girder, assembly, connection and 3# girder and just connects the installation of binder
Position；
Step 6,3# girder track advancing connection guide rail
Along extending welding track advancing at the bottom of 3# girder beam, and it is connected with the existing guide rail in 3# girder front end, position, physical dimension
Identical with the track advancing of 1# girder, 2# girder；
Step 7,3# girder are given up the throne
1. running mechanism driving means after reverse operating, by phase para-position between the wheel shaft of the upper framework of front leg strut with track advancing
Moving, traction 1# girder, 2# girder, 3# girder connector retreat in tunnel, until track advancing and existing rail attachment point and
The upper framework front end alignment of front leg strut, fallback procedures strengthens monitoring；
2. after giving up the throne, supporting leg in installing by mobile formwork；
Step 8, installation 1# nose girder
1. use crane lifting 1# nose girder in place, complete 3# girder, the docking of 1# nose girder, assembly, connection and 1# nose girder and connect system
Installation in place；
2. after reverse operating, running mechanism draws 1# girder, 2# girder, 3# girder and 1# nose girder connector along nose girder guide rail to tunnel
Move in road, until the upper framework front end of 1# nose girder 4 front end alignment front leg strut 8；
Step 9, installation 2# nose girder
1. lifting 2# nose girder is in place, completes 1# nose girder, the docking of 2# nose girder, assembly, connection and 2# nose girder and just connects the installation of system
Position；
2. after reverse operating, running mechanism traction 1# girder, 2# girder, 3# girder and 1# nose girder, 2# nose girder connector are led along nose girder
Rail retreats mobile in tunnel, until the upper framework front end of 2# nose girder front end alignment front leg strut；
Step 10, installation 3# nose girder and overhead traveling crane
1. lifting 3# nose girder is in place, completes 1# nose girder, 2# nose girder, the docking of 3# nose girder, assembly, connection and 3# nose girder and connects system
Install in place；
2. use crane that mobile formwork top overhead traveling crane is installed in place；
Step 11, front leg strut upper framework preposition
1. rear support leg and the oil cylinder of middle supporting leg are put down, by adjusting rear support leg and the lowering or hoisting gear of middle supporting leg, by assembled, connection
Good mobile formwork beam body upwards jack-up, conveniently removes the upper framework lifting job of temporary rest pier and front leg strut；
2. remove the first temporary rest pier and the second temporary rest pier, with overhead traveling crane, the upper framework handling of front leg strut is moved forward, be placed in abutment
At breastwork, fixed after adjusting spacing, adjust simultaneously and lay retrogressing rail；
3. supporting leg and the oil cylinder of rear support leg during synchronous reduces, beam body front slideway uniformly falls into the wheel of the upper framework of front leg strut
In axial trough；Behind rear end the wheel shaft of running mechanism fall into retreat rail groove in, and front and back by the upper framework of front leg strut and after walk
Row mechanism bears beam body load, the oil cylinder of middle supporting leg and rear support leg and shrinks unsettled；
Step 12, nose girder via
1. running mechanism after positive operation, pushing tow mobile formwork beam body moves forward along nose girder guide rail, starts nose girder via and moves,
Until middle supporting leg moves to abutment breastwork, stop reach；
2. start rear support leg and the oil cylinder hydraulic device of middle supporting leg, rear support leg and middle supporting leg land fixing, to bear mobile formwork
Beam body whole load；
Step 13, installation front leg strut
After bridge pier installs and fixes the lower framework of front leg strut, use the upper framework of overhead traveling crane handling front leg strut along nose girder to bridge pier
On, with the connection of the lower framework of front leg strut, it is achieved the installation of front leg strut is in place, complete nose girder head hole via；
Step 14, girder via and plug-in installation
1., after adjusting after walking rails, the oil cylinder shrinking rear support leg and middle supporting leg is in vacant state, and beam body load is by front leg strut
Undertake with rear running mechanism；
2. running mechanism after starting, thrust beam body moves forward, and girder starts via；
3. moving forward, be specifically as the criterion with on-the-spot external position, when possessing the lifting plug-in condition of 8#, girder stops reach, opens
Beginning, 8# is plug-in and triangle outrigger in lifting；
4. moving forward, when possessing the lifting plug-in condition of 7#, girder stops reach, starts to lift that 7# is plug-in and triangle outrigger；
5. moving forward, when possessing the lifting plug-in condition of 6#, girder stops reach, starts to lift that 6# is plug-in and triangle outrigger；
According to said method, until completing all plug-in lifting operations；
Step 15, complete whole via
In completing on bridge pier, supporting leg installs and fixes, and falls middle supporting leg and rear support leg, is respectively supported on bridge pier and abutment, receives
Contracting front leg strut, front leg strut handling to 2# bridge pier is installed, is fixed, complete mobile formwork whole via task, starts by application overhead traveling crane
Enter beam operation processed.
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| CN107725073A (en) * | 2017-11-06 | 2018-02-23 | 中建八局第建设有限公司 | A kind of simple more straddle type tunnel inverted arch trestle structure and construction methods |
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| CN110172922A (en) * | 2019-06-17 | 2019-08-27 | 中国建筑第六工程局有限公司 | A kind of environmentally friendly downlink Self-propelled steel trestle work structure construction method |
| CN111270615A (en) * | 2020-03-11 | 2020-06-12 | 中国建筑第八工程局有限公司 | Tunnel widening structure at bridge-tunnel connection part and bridge construction method |
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| CN107725073B (en) * | 2017-11-06 | 2024-04-02 | 中建八局第一建设有限公司 | Tunnel construction method based on simple trestle |
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| CN119195009A (en) * | 2024-11-27 | 2024-12-27 | 中铁北京工程局集团有限公司 | An upward self-propelled mobile formwork for bridge construction and a bidirectional construction method |
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