A kind of concrete girder cast-in-situ construction method
Technical field
The present invention relates to method for bridge construction technical fields, in particular to a kind of concrete girder cast-in-situ construction method.
Background technique
The country is more for concrete-bridge superstructure cast-in-situ construction method, respectively corresponds to different rack template systems
System, common are Hanging Basket, full framing, beam-type support, upstroke movable framework, downlink movable mould frame etc..
Hanging Basket is usually used in the construction of large-span continuous girder bridges cantilever pouring, is not influenced by spanning landform and height, light structure,
It without large-scale lifting appliance, but pours and can only promote paragraph by paragraph, speed of application is restricted, and is not suitable for the coagulation of widened sections
Native main girder construction.
The advantages of full framing and beam-type support belong to floor stand, floor stand be so that bridge integrity compared with
It is good, the disadvantage is that the installation of bracket, removing that the time is longer, and rack template consumption is big, poor for high pier main girder construction adaptability.
And full framing is very big by the spanning influence of topography, it is higher to ground requirement for bearing capacity;Beam-type support has spanning landform certain
Adaptability, but need large-scale lifting appliance auxiliary construction.
Upstroke movable framework and downlink movable mould frame are not influenced by spanning landform and height, but can only be promoted by cross
Formula pours, and stringent to the design requirement of device structure, early investment higher cost, while not also being suitable for broadening or getting higher cutting
The concrete girder in face is constructed.
It is proposed that a kind of transportable supporting structure solves above-mentioned technical problem, Patent No.
The Chinese invention patent of entitled " construction method based on Combined movable mould bases cast-in-situ box girder " of " CN106120563B ", this is specially
Benefit describes one kind can be along the compound die carrier structure that girder vertical and horizontal move, and the mould bases is after the completion of one section of girder pours
It can laterally move and be demoulded, then move longitudinally to next section of girder casting position and carry out pouring for next section of girder
Construction, efficiently solves the sky high cost that full framing is built, applying for box girder with variable cross section can not be carried out by also avoiding cradle construction
The problem of work, and do not influenced by pier stud in moving process, entire construction method is simple and efficient.But since the mould bases builds support
On the bracket being mounted on pier stud, bracket is needed along bridge construction direction Man Pu, bracket build needs expend largely at
This, and entirely build that difficulty is also quite large, need to change the original structure of pier stud, this undoubtedly will cause the damage of pillarwork
Wound.
Summary of the invention
The purpose of the present invention is to solve the deficiency of the above background technology, provides a kind of concrete girder cast-in-place construction side
Method.
The technical solution of the present invention is as follows: a kind of concrete girder cast-in-situ construction method, it is characterised in that: in master to be poured
It is built below beam and, to the spaced apart supporting leg basis in direction, supporting leg basis is relied on to build two groups at least three groups of walkings along bridge
The disk of supporting leg buckles bracket, buckles in disk and arranges that template pours girder on bracket, two groups of disks is driven to buckle bracket after the completion of pouring, after demoulding
It is moved away from along direction across bridge, after avoiding pier stud completely, drive disk button bracket edge moves along the bridge to next girder to be poured,
It drives two groups of disks to buckle bracket and moves toward one another the falsework that combination forms next girder to be poured, successively carry out, until completing institute
There is girder pouring construction.
The method for further building supporting leg basis are as follows: poured on ground along direction across bridge direction below the girder to be poured
The sliding rail arranged along direction across bridge is installed in the upper surface on supporting leg basis in supporting leg basis.
Further build the method that disk buckles bracket are as follows: at least three groups of walking supporting legs are mounted on the lower end that disk buckles bracket,
Make the to walk upper end of supporting leg can buckle bracket to being slidably connected to disk along bridge, adjacent walking supporting leg along suitable bridge to arranged for interval,
Then on the basis of handling disk buckles bracket and walking supporting leg to supporting leg, it is slidably connected to walking supporting leg lower end on the basis of supporting leg.
Further two groups of disks of driving buckle bracket and support or oppose along cross-bridges the method moved are as follows: buckle bracket to two groups of disks and apply cross-bridges
To the traction force in direction, the walking supporting leg lower end edge supporting leg basis direction across bridge for buckleing disk below bracket is mobile.
Further drive disk button bracket is along the method to move along the bridge to next wait pour below girder are as follows: is maintaining disk
In the case where detaining bracket stable, several groups walking supporting leg is detached from the corresponding supporting leg basis in lower section, disk is buckled to the weight of bracket
Amount is transferred on the walking supporting leg without departing from supporting leg basis, is buckled bracket application to disk and is buckled bracket not to traction drives disk along bridge
It is detached from the walking supporting leg on supporting leg basis and is slidably advanced, after sliding in place, disk will be followed to buckle the mobile disengaging supporting leg basis of bracket
Walking supporting leg be supported on again lower section supporting leg on the basis of, successively alternately, until disk buckle bracket be moved to it is next to be poured
It builds below girder.
The method that further walking supporting leg is detached from the corresponding supporting leg basis in lower section are as follows: to the company of sliding in walking supporting leg
It is connected to the second connecting support on the basis of supporting leg and applies active force straight up, move the second connecting support vertically, it is complete
Below total detachment behind supporting leg basis, horizontal pin is passed through in lower sleeve and walking supporting leg in the second connecting support and is slidably connected
Upper bush in the first connecting support that disk buckles bracket retightens lower sleeve and upper bush, completes the receipts of walking supporting leg
Compression process.
Further apply the method for active force straight up to the second connecting support are as follows: install in the outside of lower sleeve
The first horizontal fixed link installs corresponding second fixed link in the outside of upper bush, drawstring is arranged in the first fixed link, will
Drawstring is wrapped in the second fixed link, and applies pulling force to the drawstring part being wrapped in the second fixed link, forces the second connection
Support vertically moves.
The walking supporting leg on the disengaging supporting leg basis for following disk to buckle bracket movement is further supported on to the branch of lower section again
Method on the basis of leg are as follows: install in the upper surface on supporting leg basis with reeded temporary support, it is mobile that disk to be followed buckles bracket
Walking supporting leg be moved to supporting leg basis top after, adjust walking supporting leg make its stretching, extension, the lower end for supporting leg of walking is supported on and is faced
When support on.
Advantages of the present invention has: 1, by disk buckle pedestal lower end be provided with can along bridge to the walking moved with direction across bridge
Supporting leg, so that disk is buckled bracket has the function of way moving, and the obstruction of pier stud can be effectively evaded in moving process, disk is improved and buckles
It is excessive, immovable to solve the problems, such as that full framing builds cost for the utilization rate of bracket;
2, buckleing bracket by moveable disk realizes the pouring construction of irregular beam body, solves Hanging Basket or other rows
The problem of bracket does not adapt to box girder with variable cross section pouring construction is walked, the difficulty of box girder webs construction is reduced;
3, it is used cooperatively by the way that walking supporting leg and supporting leg are basic, reduces the laying cost on supporting leg basis, avoid biography
Mobile holder of uniting needs to reduce supporting leg basis along the problem along bridge to full paving supporting leg basis and build cost, it is difficult to reduce construction
Degree;
4, it is alternately travelled by multiple walking supporting legs, reduces the difficulty that entire disk buckles bracket walking, improve beam body and pour
The efficiency built;
5, by the way that temporary support is arranged on the basis of supporting leg, temporary support is provided for the walking supporting leg of sliding so far, is avoided
Because weight crosses havoc supporting leg basis, temporary support can limit walking supporting leg, avoid because of peace caused by sliding
Full accident occurs.
Mobile bracket casting construction method of the invention is easy to operate, is adapted to the pouring construction of box girder with variable cross section, phase
The mobile bracket casting method cost of the invention compared with full framing casting method is more cheap, and falsework is built more square
Just, there is great promotional value.
Detailed description of the invention
Fig. 1: mobile bracket main view of the invention;
Fig. 2: mobile bracket of the invention is along direction across bridge moving structure schematic diagram;
Fig. 3: the main view of walking supporting leg of the invention;
Fig. 4: the side view of walking supporting leg of the invention;
Fig. 5: the side view of mobile bracket of the invention;
Fig. 6: mobile bracket of the invention is along step 1 structural schematic diagram that moves along the bridge;
Fig. 7: mobile bracket of the invention is along step 2 structural schematic diagram that moves along the bridge;
Fig. 8: mobile bracket of the invention is along step 3 structural schematic diagram that moves along the bridge;
Fig. 9: mobile bracket of the invention is along step 4 structural schematic diagram that moves along the bridge;
Figure 10: mobile bracket of the invention is along step 5 structural schematic diagram that moves along the bridge;
Figure 11: mobile bracket of the invention is along step 6 structural schematic diagram that moves along the bridge;
Wherein: 1-disk buckles bracket;2-supporting legs basis;3-sliding rails;4-the first connecting support;5-the second connecting support;
6-upper bushes;7-lower sleeves;8-bolts;9-first through hole;10-the second through-hole;11-the first fixed link;12-the second
Fixed link;13-drawstrings;14-stringers;15-tracks;16-upper rollers;17-bottom rollers;18-temporary supports.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The mobile bracket of the present embodiment may be implemented direction across bridge and along bridge to movement, the bridge of different location is adapted to this
Beam pours and evades the structures such as pier stud present in bridge casting process.As shown in Fig. 1~2,5~11, the branch of the present embodiment
Frame structure sheet buckles bracket 1 as the disk for being used to support bridge formwork for placing, disk buckle bracket 1 can according to box beam size to be poured into
Row adjustment, the pouring construction of box girder with variable cross section is adapted to this.Disk buckles 1 lower end of bracket and is anchored at plate platform by bolt arrangement
On, more are equipped with below plate platform along, to spaced apart crossbeam, crossbeam lower end is equipped with multiple along direction across bridge along bridge
Spaced apart stringer 14, crossbeam and stringer 14 are criss-cross arranged, and are used to support entire disk and buckle 1 structure of bracket.
The mobile bracket of the present embodiment is buckled bracket 1 along the spaced apart disk of direction across bridge by two groups and is formed, and two groups of disks buckle bracket 1
The supporting structure to be formed for pouring box beam is combined when pouring, as shown in Fig. 1~2.Every group of disk buckle 1 lower end of bracket be provided with to
Few three groups along bridge, to spaced apart walking supporting leg, as shown in Fig. 5~11, the disk of the present embodiment is buckled 1 lower end of bracket and is provided with
Four groups of walking supporting legs.
As shown in figs. 34, walking supporting leg includes being slidably connected to disk to buckle the first connecting support 4 on bracket 1, this implementation
The stringer 14 of example arranges that 14 lower end of stringer is provided with the direction across bridge track 15 in inverted T shaped arrangement, the first connection along bridge to direction
It is provided with that be hooked on track 15 can be along the upper roller 16 along bridge to sliding on support 4.Upper roller 16 is hooked on track 15 real
It is existing walk supporting leg carry out along track 15 along bridge moving to direction.
As shown in figs. 34, walking supporting leg includes the second connecting support 5 being slidably connected on supporting leg basis 2, supporting leg branch
Seat 2 is to pour in the reinforced concrete foundation on ground, and 5 lower end of the second connecting support is provided with and can be slidably supported along direction across bridge
In the bottom roller 17 on sliding rail 3.Bottom roller 17 is slidably connected to along the sliding rail 3 of direction across bridge arrangement, realizes walking supporting leg along sliding
The movement in the progress of rail 3 direction across bridge direction.
In order to realize walking supporting leg along bridge moving to direction, the present embodiment is in the first connecting support 4 and the second connection
The stretching structure that can vertically shrink stretching, extension is provided between support 5, as shown in figs. 34, stretching structure includes being fixed on first
The upper bush 6 of 4 lower end of connecting support and the lower sleeve 7 for being fixed on 5 upper end of the second connecting support, upper bush 6 and lower sleeve 7 can edges
Vertically movable is set-located.Multiple vertically spaced apart first through hole 9 are offered on upper bush 6, are opened on lower sleeve 7
Equipped with multiple vertically spaced apart second through-holes 10, first through hole 9 and second is arranged in by bolt 8 in the horizontal direction and is led to
In hole 10, vertical height is adjusted into the upper bush 6 completed and lower sleeve 7 is fixed.
As shown in figs. 34, in order to drive upper bush 6 and lower sleeve 7 to generate vertical relative displacement, the present embodiment is in upper set
It is provided with driving structure on cylinder 6 and lower sleeve 7, driving structure includes being arranged in the first fixed link of lower sleeve 7 in the horizontal direction
11 and it is arranged the drawstring 13 being fixed in the first fixed link 11, drawstring 13 is vertically arranged, and lower end is fixed on the first fixed link
On 11, upper end is connect with the power device that driving drawstring 13 vertically moves.Driving structure further includes being arranged in the horizontal direction
Second fixed link 12 of upper bush 6, drawstring 13 are wrapped in the second fixed link 13.It is driven by the driving equipment of hoist engine one kind
Drawstring 13 is mobile, and the second fixed beam 12 changes the moving direction of drawstring 13, realizes the movement of lower sleeve 7 vertically.
It is supported on supporting leg basis 2 in walking supporting leg moving process, the present embodiment is arranged useful in 2 upper surface of supporting leg support
In the temporary support 18 for carrying out temporary support to walking supporting leg, temporary support 18 is to be embedded in 2 upper surface of supporting leg support and open up
There is the steel plate in the U-type groove hole for accommodating walking supporting leg lower end.
It when practical operation, carries out in accordance with the following steps: 1, carrying out the whole rule of supporting structure and movement before bracket is set up
Meter is delineated, and processes all parts by design requirement in back court;
2, first, in accordance with integrated planning design and construction supporting leg basis 2, and sliding rail 3 is installed, the length on supporting leg basis 2 should meet
Bracket whole lateral moving is staggered pier stud, so that vertical shift Shi Buyu pier stud collides;
3, stringer 14 is pre-machined with walking supporting leg, and assembly and connection is carried out at spanning, and driving equipment is also installed simultaneously, and
It is mounted on the sliding rail 3 on supporting leg basis 2;
4, after stringer 14 is all installed, it is laid with crossbeam, then plate platform is installed, crossbeam is common with plate platform
Platform structure is constituted, and the connection bolt arrangement for buckleing 1 pedestal of bracket with disk is set in plate platform;
5, after plate platform is installed, disk can be set according to the load of girder and buckles bracket 1, frame bottom passes through company
Connecting bolt is reliably connected, and the reinforcement measures such as horizontal joining beam are arranged in bottom, increases the globality of bracket;
6, disk is buckled bracket 1 and is set up to designed elevation, i.e., then mountable distribution beam, template etc. carry out concrete girder
Construction;
7, form removal after the completion of main girder construction at this drives two groups of disks to buckle bracket 1 along direction across bridge by power-equipment
It is mobile, so that disk is buckled bracket 1 and is detached from below the beam body for pouring completion;
8, to next pouring construction station is marched to, the pouring construction of next section of beam body is carried out, until all along bridge
Beam section pours completion.
The bracket of the present embodiment as shown in Fig. 5~11 is along the method to move along the bridge are as follows:
Step 1: as shown in Fig. 5~6, every group of disk buckles bracket 1 and divides into four groups of walkings supporting leg A, B, C, D, is respectively supported at pair
On four groups of supporting leg bases a, b, c, the d answered, wherein D is in the front end of entire bracket direction of travel, when mobile, to supporting leg A and
Supporting leg C carries out vertical adjustment, first extracts the bolt 8 in two groups of walking supporting legs, and driving lower sleeve 7 vertically moves, makes entirely to prop up
The weight of frame is transferred on walking legs B and D;
Step 2: as shown in fig. 7, drive disk button bracket 1 is along moving along the bridge, disk buckles bracket 1 and walking legs B and D is generated
Relative displacement sliding, until walking supporting leg A and C are moved respectively to up to above supporting leg basis b and d;
Step 3: as shown in figure 8, decentralization walking supporting leg A and C make walking supporting leg A and C be respectively supported at supporting leg basis b and d
On temporary support on, then driving walking legs B and D are along moving along the bridge to supporting leg basis c and e;
Step 4: as shown in figure 9, decentralization walking legs B and D make it be respectively supported at the interim branch on supporting leg basis c and e
On seat, supporting leg basis b and d that walking supporting leg A and C make walking supporting leg A and C be detached from decentralization are shunk;
Step 5: as shown in Figure 10, drive disk button bracket 1 is along moving along the bridge, and disk buckles bracket 1 and walking legs B and D is produced
Raw relative displacement sliding, until walking supporting leg A and C are moved respectively to up to above supporting leg basis c and e;
Step 6: as shown in figure 11, successively alternately, until disk buckle bracket 1 be moved to it is next across wait pour under box beam
Side, i.e. walking supporting leg A, B, C and D are respectively supported on supporting leg basis e, f, g and h, are completed disk and are buckled moving along the bridge for bracket 1.
The present embodiment the lower end that every group of disk buckles bracket 1 be provided with it is multiple rows of arrange along bridge to spaced apart walking supporting leg,
It is every seniority among brothers and sisters walk supporting leg row include it is multiple along the spaced apart walking supporting leg of direction across bridge, be provided between the walking supporting leg in same row
Connecting rod.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.