CN110421687A - A kind of construction method of the hydraulic box culvert template of assembled and its prefabricated assembled box culvert - Google Patents
A kind of construction method of the hydraulic box culvert template of assembled and its prefabricated assembled box culvert Download PDFInfo
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- CN110421687A CN110421687A CN201910716311.0A CN201910716311A CN110421687A CN 110421687 A CN110421687 A CN 110421687A CN 201910716311 A CN201910716311 A CN 201910716311A CN 110421687 A CN110421687 A CN 110421687A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
- B28B7/18—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article
- B28B7/183—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article for building blocks or similar block-shaped objects
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Sewage (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The present invention provides a kind of hydraulic box culvert template of assembled and its construction methods of prefabricated assembled box culvert, belong to highway engineering construction field, the hydraulic box culvert template of assembled of the invention includes template, hydraulic power system and adjusting support, by the installation of assembled hydraulic box culvert template, use, steel bar meter and the installation of template, framework of steel reinforcement handling, enter mould, internal model installation, casting concrete when the installation of template, the pouring of concrete, concrete curing and form removable, finally prepare prefabricated assembled box culvert.The box culvert can concentrate segmentation prefabricating; it is installed at the scene; save a large amount of concrete; construction speed is accelerated, construction cost is reduced, is greatly reduced and cienega soil is destroyed and is polluted; it is especially prominent at environmentally protective aspect; and the entity quality for effectively raising culvert makes appearance and protective layer qualification rate to greatly being promoted, achieves preferable economic and social profit.
Description
Technical field
The invention belongs to highway engineering construction fields, and in particular to a kind of hydraulic box culvert template of assembled and its prefabrication and assembly construction
The construction method of formula box culvert.
Background technique
Reinforced concrete cover plate culvert is chiefly used in field high speed, Class I highway construction, especially constructs in northern area, weather is cold
Cold, effective construction time is short.Reinforced concrete cover plate is contained mainly using live assembling reinforcement, formwork, casting concrete, need by
Maintenance can come into operation for a long time, and long construction period is influenced by weather condition, and various things are easily caused in excavation construction
Therefore huge hidden danger is brought to the person and property safety.Based on this, prefabricated assembled box culvert technology is come into being.
Prefabricated assembled prefabricated box culvert is a kind of box structures that armored concrete is prefabricated, is the rapid construction work of box culvert
Skill is mainly formed using place concentration pre-casting, can shift to an earlier date that batch production is prefabricated, and speed of production is fast, and construction quality is easily controllable, machine
Tool transport, assembled in situ speed of application are fast, can effectively shorten the duration, there is construction quality to be easy to control, short construction period, construction
The advantages that high-efficient.
CN104912099A discloses a kind of prefabricated concrete box culvert, including the horizontal groove profile being laid on the ground
Pedestal, the length direction in the middle part of the upper surface of groove profile pedestal vertical plates on both sides along groove profile pedestal is respectively equipped with a boss, in boss
Top surface be embedded with several long hex nuts being vertically arranged along land length direction interval, be arranged in the bottom outside of boss
There is a rubber seal, a wallboard is equipped with vertically respectively in the top of groove profile pedestal vertical plates on both sides, in the upper and lower surfaces of wallboard
Middle part is respectively equipped with a groove along the length direction of wallboard, and the length direction in the middle part of the bottom surface of groove along groove corresponds to each length
The position of hex nut is embedded with several steel bushings being vertically arranged, box culvert transport and easy for installation, large stretch of prefabricated using four
Concrete plate component groups dress, flat member transport, lifting are convenient, and the factorial production, concrete strength is high, quality controllable, comprehensive
At low cost, short construction period is closed, quality, use scope is wide, economic and environment-friendly.
CN102418319A discloses a kind of prefabricated assembled box culvert and its construction method, and the box culvert is assembled knot
Structure is made of armored concrete culvert body, aileron, basis, deformation joint, and box culvert, which is contained, to be saved and mark as by transition culvert section, non-standard culvert
Standard contains the unitary closed formula reinforced concrete frame structure that section is composed, and contains body and aileron is all made of assembly construction.The box culvert
Mass production can be carried out in factory, assembled in situ accelerates culvert construction progress, shortens the construction period, guarantees the quality of culvert.
But in general, above-mentioned assembled box culvert is higher to component and the precise requirements of installation, there are errors when assembly, need weight
New construction, influences to increase difficulty of construction while construction quality, exists simultaneously the danger that template is easy to fall off.
For box culvert construct there are site operation quality not easy to control, long construction period and it is at high cost the problems such as, need to seek
The construction method for looking for a kind of hydraulic box culvert template of assembled and its prefabricated assembled box culvert, while improving culvert entity quality,
It accelerates construction progress, reduces construction cost.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of hydraulic box culvert template of assembled and its prefabricated assembled casees
The construction method of culvert saves a large amount of concrete, accelerates construction speed, reduces construction cost, and effectively raise
The entity quality of culvert makes appearance and protective layer qualification rate obtain greatly being promoted, and achieves preferable economy and society effect
Benefit.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of hydraulic box culvert template of assembled, comprising: template, hydraulic power system and adjusting support；The template includes
Bed die, external mold, end mould and internal model；The hydraulic power system includes bottom die trolley and internal model trolley；The adjusting supports
Internal model trolley, bed die bracket and the support of external mold hydraulic system.
Further, the internal model includes internal model backform and internal model side form.
Further, the end mould includes nose mould, female end mould and flush end mould, and flush end mould is only used for first and last and contains section end
It is prefabricated, the both ends of the surface of the road Ji Zheng box culvert.
Further, the end mould is bolted with internal model, bed die and external mold.
Further, the end mould is placed in bed die side, i.e., end mould is adjacent to bed die from side, and the internal model is placed in forward and backward
The inside of end mould is measured, the external mold is placed in end mould external juxtaposition between front and rear ends mould.
Further, external mold bottom die height is consistent with bed die height, i.e. the inner wall of external mold, after interior curved 90 degree with
The either flush of bed die.
Further, the external mold hydraulic system support includes positioning bolt, external mold hound and fixing leg.
The present invention also provides a kind of prefabricated assembled box culvert construction methods, comprising the following steps:
The hydraulic box culvert template installation of S1 assembled: it is successively installed according to the sequence of bed die, external mold, end mould and internal model.
The use of S2 template: template is installed on station as required, adjustment meets structure size requirement；
S3 steel bar meter and installation: the arrangement including tie with reinforcing bar, the installation of built-in fitting and positioning, concrete pad
With the setting of framework of steel reinforcement suspension centre；
The handling of S4 framework of steel reinforcement enters mould: will bind molding framework of steel reinforcement lifting, enters mould；
The installation of S5 internal model: internal model internal model trolley is moved into framework of steel reinforcement inner cavity；
The installation of template when S6 casting concrete；
S7 concrete pours: pouring including bottom slab concreting, web and pours with top plate；
S8 concrete curing；
S9 form removable.
Further, when casting concrete described in step S6 template installation the following steps are included:
A. after the completion of template spelling, release agent is smeared after polishing template；
B. oil cylinder elongation is folded by the external mold on external mold hound and external mold is adjusted to suitable position, measure hanging down for external mold
Straight degree, framework of steel reinforcement is hung on bed die, suitable position is adjusted to；
C. in place by the lifting of female end mould, fastened with external mold；
D. start on internal model trolley, internal model is transported to suitable position together with nose mould, nose mould and external mold are spelled
It connects；
E. in place by the jacking of internal model backform, fitted closely with end mould, after internal model side form rotated into suitable position, by internal model
After side form is held out against, by internal model and end mould fastening；
F. fining twisted steel is fixed and is completed to drawing；
G. bolt is verified and fastens after-pouring concrete.
Further, jacking described in step e is completed by jacking cylinder, and the rotation is complete by internal model side form oil cylinder
At described hold out against is completed by spiral strut, and the fastening uses Rapid connecting bolt is completed.
Further, include external mold and bed die to drawing to drawing described in step f, external mold and internal model side form to drawing and two
The outer intermode of block to drawing.
In some specific embodiments, a kind of prefabricated assembled box culvert construction method of the invention, including following step
It is rapid:
The hydraulic box culvert template installation of S1 assembled:
It is successively installed according to the sequence of bed die, external mold, end mould and internal model；Reinforcing bar should be first hung in front of internal model installation
The position of frame, external mold is fixed, and when each template is installed, its plan-position, levelness and verticality are checked in measurement；Hold mould by
δ 14mm steel plate makees panel, and when installation, end mould is joined together with internal model, bed die and external mold by bolt, the connection of end mould and internal model
Place is equipped with elongated rubber press strip, being capable of effective mortar leakage prevention after compression is bolted；Bed die panel uses δ
12mm thick steel plate, material Q235B；External mold uses the quality steel plate of 8mm thickness, material Q235B；Spillage is in external mold in order to prevent
It is equipped with adhesive tape between bed die, is conducive to the control of segment geometric dimension to be poured, and be convenient for the dismounting of template；Internal model is by δ 8mm steel
Plate and ribbed stiffener are made.
After each component processing and manufacturing of template, examination spelling is carried out in factory, is foundation using box culvert construct figure, respectively to template
Each geometric dimension is checked, to meet construction requirement.Meanwhile in the case where meeting structure size requirement, to each hydraulic dynamic
Force system carries out no-load test, to examine each accuracy of action；
Wherein, framework of steel reinforcement is hung in front of internal model installation；Bed die installation accuracy requires highest, and when installation should be noted that following several
Point:
(1) bed die longitudinal midline is overlapped with track centerline；
(2) bed die cross central line is overlapped with pre-buried external mold diagonal brace pole socket base plate center line；
(3) bed die must be secured, and template itself has enough rigidity.
The use of S2 template:
Template is installed on station as required, adjustment meets structure size requirement；
S3 steel bar meter and installation: including tie with reinforcing bar, the installation of hanging ring built-in fitting and positioning, concrete pad
The setting of arrangement and framework of steel reinforcement suspension centre.
Wherein, in tie with reinforcing bar box culvert segment reinforcing bar take first binding molding, again integral hoisting enter the mode of mould into
Row, binding sequence is successively are as follows: base plate steel bar binding, web reinforcement binding and roof steel bar binding；
The protective layer of framework of steel reinforcement is formed by the round mortar pad being mounted on framework of steel reinforcement, and the thickness of cushion block is pressed
25mm+2mm control.When installation, cushion block is arranged by blossom type, and spacing is no more than 1m, and with tied silk fixation, bottom plate and web
Junction suitably encrypts.Cushion block clean surface, cannot be by the pollution of greasy dirt, and cushion block color is consistent with structural concrete appearance,
Intensity requirement is not less than slab culvert concrete intensity；
The handling of S4 framework of steel reinforcement enters mould:
Bind molding framework of steel reinforcement it is qualified by inspection after i.e. Liftable, enter mould, lifting can be completed by gantry crane.To prevent
Deformation when framework of steel reinforcement lifts, is lifted by crane using special hanger multiple spot, the lifting lug on framework of steel reinforcement bent with the round steel of Φ 30 and
At the main reinforcement welding of lifting lug and framework of steel reinforcement, fusion length is not less than 16cm, and hands over the main reinforcement within the scope of lifting lug surrounding 60cm
Crunode carries out spot welding；Framework of steel reinforcement colour bar cloth or other coverings that mould casting concrete cannot be entered in time are covered,
It prevents from getting rusty after exposing to the sun and rain；
The installation of S5 internal model:
Internal model trolley carries internal model and moves into framework of steel reinforcement inner cavity, and shape is unfolded in internal model with rack-mount hydraulic system
At the prefabricated internal model of box culvert, then adjust rod-adjurstable support, fixed internal model；
The installation of template when S6 casting concrete:
A. it after the completion of template spelling, polished template, smear release agent；
B. oil cylinder elongation is folded by the external mold on external mold hound and external mold is adjusted to suitable position, measure hanging down for external mold
Straight degree, framework of steel reinforcement is hung on bed die, suitable position is adjusted to；
C. by female end mould with gantry crane lifting in place, fastened with external mold by Rapid connecting bolt；
D. start internal model trolley, internal model is transported to suitable position together with nose mould, nose mould is lifted and external mold
Splicing；
E. first internal model backform is jacked in place by jacking cylinder, internal model side form is passed through into internal model after fitting closely with end mould
Side form oil cylinder rotates to suitable position, after internal model side form is held out against with spiral strut, then by Rapid connecting bolt by internal model with
End mould fastens；
F. the fining twisted steel of drawing will be fixed, including external mold and bed die to drawing, pair of external mold and internal model side form
Draw, two pieces of outer intermodes to drawing；
G. finally by bolt verify one time, all bolt fastenings are good, after can casting concrete；
S7 concrete pours:
(1) bottom slab concreting
Respectively two layers of progress when bottom slab concreting, it is 25-40cm that every layer, which pours thickness control,；The vibrator as a plug that vibrates is
It is main, in the reinforcing bar compact district of bottom plate Yu web junction, 2 adhesion type high speed vibrator auxiliary vibrations are respectively installed additional at bottom plate both ends
It smashes.
Center is taken to pour when bottom slab concreting toward two sides, 10cm is reserved when pouring wouldn't pour completely, pour centainly to web
After height, then carries out feed supplement and pour；It is appropriate to reduce concrete slump 1-2cm and when pouring web, with prevent concrete to
Bottom plate turns over；
(2) web pours
Web uses the symmetrical blanking in both sides, and every side blanking side amount is 1m every time3, be equivalent to every layer concrete pour with a thickness of
30cm；The Shi Xianyong internal vibration stick that vibrates vibrates, and is then vibrated again with attached vibrator, what adhesion type vibrated
Opening time control are as follows: single vibrating time is no more than 30s, and every place adds up vibrating time and is no more than 60-80s；It shakes as a plug
Smashing ensures that concrete vibrating is closely knit based on device, ensures Surface Quality of Concrete with attached vibrator；
(3) top plate pours
For top plate without template, surrounding has the operating platform with guard rail, and top plate thickness 38cm divides two layers and pours, plug-in type vibration
It smashes device to vibrate, first floor concrete is all paved with, and the second layer is successively poured from centre to two sides, and wire rake plucking is used after initial set.
S8 concrete curing
Concreting should be conserved in time after completing initial set, after demoulding, contained section by bottom die trolley and directly moved into sunlight
Shed, sunlight shed 4cm × 8cm square steel and Φ 20cm round steel form frame, are integrally sealed with transparent glassy sunlight tile
It closes, 10 ° high than ambient temperature of temperature of shed or so, to increase maintenance effect, steam is passed through with electric heating steam generator, to have
Effect utilizes steam, upper tubbiness plastic film is covered on box culvert segment as steam-cured cover, bottom is tied tight with elastic belt, and steam is led to
Enter box culvert segmented interior, reduce steam-cured space, play the role of improving efficiency and reduce energy consumption, contains section through detection and reach the strong of demoulding
Degree and time, which reach, moves into special beam strorage area with gantry crane after demoulding requirement.
Wherein, steam curing by rest, heat up, constant temperature, cooling four-stage are controlled.
Rest the stage: the stage of resting is concreting after the completion to a period of time before steam supply heating.Teletostage severe cold
Weather should casting concrete at noon, and cover fluffy body in time, fill vapour and keep the temperature 5 DEG C or more, the time of resting is 3-4 hours.
Temperature rise period: using temperature of resting as starting point, feed air temperature speed control is in 15 DEG C/h, unsuitable too fast, temperature-rise period
Should be every 30 minutes test primary steam temperature and relative humidity (relative humidity is not preferably less than 90%), and carry out original record.
The constant temperature stage: thermostat temperature is not preferably greater than 50 DEG C, and relative humidity is not less than 95%, primary simultaneously every test in 60 minutes
Original record is carried out, constant temperature continues to meet demand of anti-crack to the intensity of concrete.
Temperature-fall period: when cooling, speed control is in 10 DEG C/h.
When removing steam-cured cover, steam-cured cover cannot be opened immediately, avoid causing concrete surface to go out because of excessive temperature differentials
Steam-cured cover both ends should first be opened and carry out case room ventilation by now contraction crack, be down to culvert body surface temperature slowly and nature
After the temperature difference of temperature is less than 15 DEG C, then steam-cured cover is removed, and box culvert surface and its inner cavity are covered.
S9 form removable
Slab culvert concrete is after maintenance reaches 50% (25MPa) of its design strength, form removal；Form removable sequence
Are as follows: internal model remove → hold mould dismounting → external mold remove → newly pouring box culvert moves on to health position, specifically include: first removing internal model side form
The Rapid connecting bolt and screw of spiral strut and internal model and end mould between internal model trolley, then utilize the liquid of inner formwork system
Equipment (including internal model side form oil cylinder, jacking cylinder and spiral strut) is pressed to shrink internal model, starting internal model trolley removes internal model；It is interior
The end mould of mould trolley side is directly hung on the bracket on internal model trolley with gantry crane, and the end mould of the other side is hung using gantry crane
On reserved vacant lot；It unclamps the Screw arbor with nut at both-ends and external mold and bed die of external mold top opening and base opening, hold the connection spiral shell between mould
Bolt folds oil cylinder using the external mold on external mold hound and is detached from external mold and concrete surface；By bottom die trolley track by bed die
Trolley, which moves to newly to pour, to be contained under section, will newly be poured culvert section and be moved on to health position.
Compared with prior art, the invention has the benefit that
1, the present invention compared with conventional cover plate contain save cubic amount of concrete 75% or so, can save a large amount of sands, rubble, cement,
The materials such as water, environmentally protective advantage are intuitively obvious；
2, construction method of the invention can be prefabricated inside in advance, substantially shortens the construction time, saves the duration, promotes text
Bright, green construction；
3, when excavation construction of the present invention, work surface is small, is greatly reduced and destroys and pollute to cienega soil；
4, the present invention can reduce construction maintenance cost, and overall cost is low；
5, the present invention effectively improves the entity quality of culvert, and appearance and protective layer qualification rate is made to have obtained greatly mentioning
It rises, achieves preferable economic and social profit.
Detailed description of the invention
Fig. 1 is the hydraulic box culvert formwork structure front view of assembled；
Fig. 2 is the overall schematic of the hydraulic box culvert template construction of assembled；
The installation front view of template when Fig. 3 is assembled hydraulic box culvert template casting concrete.
Wherein, the end 1- mould, 2- external mold, the fixed bracket of 3-, 4- bottom die trolley track, 5- external mold fold oil cylinder, the fixed branch of 6-
Foot, 7- internal model, 7-1- internal model backform, 7-2- internal model side form, 8- bottom die trolley, 9- positioning bolt, 10- external mold hound, the bottom 11-
Mould, 12- bed die bracket, 13- internal model trolley, 14- spiral strut, 15- jacking cylinder, 16- internal model side form oil cylinder, 17- external mold are received
Close oil cylinder.
Specific embodiment
Material used in the present invention and equipment are ordinary commercial products, therefore are not specifically limited to its source.
A kind of hydraulic box culvert template of assembled, as shown in Figs. 1-3, comprising: template, hydraulic power system and adjusting support；
Template includes bed die 11, external mold 2, end mould 1 and internal model 7；Hydraulic power system includes bottom die trolley 8 and internal model trolley 13；It adjusts
Support includes internal model trolley 13, bed die bracket 12 and the support of external mold hydraulic system.
Wherein, internal model includes internal model backform 7-1 and internal model side form 7-2；Mould 1 is held to include nose mould, female end mould and flush end mould,
Wherein, flush end mould is only used for prefabricated, i.e., the both ends of the surface of entire box culvert that first and last contains section end, and it is female end mould that remaining, which is contained between section,
It is attached with nose mould；End mould 1 is bolted with internal model 7, bed die 11 and external mold 2；End mould 1 is placed in 11 side of bed die
Side, i.e. end mould 1 are adjacent to bed die 11 from side, and internal model 7 is placed in the inside of front and rear ends mould 1, and external mold 2 is placed in end 1 external juxtaposition of mould
Between front and rear ends mould 1；2 bottom die height of external mold and 11 height of bed die are consistent；The support of external mold hydraulic system includes positioning
Bolt 9, external mold hound 10 and fixing leg 6.
The construction method of the prefabricated assembled box culvert of the hydraulic box culvert template of the assembled, comprising the following steps:
The hydraulic box culvert template installation of S1 assembled:
It is successively installed according to the sequence of bed die 11, external mold 2, end mould 1 and internal model 7；Internal model 7 should first hang in steel before installing
The position of tendons skeleton, external mold 2 is fixed, and when each template is installed, its plan-position, levelness and verticality are checked in measurement；
End mould 1 makees panel by δ 14mm steel plate, and when installation, end mould 1 is joined together with internal model 7, bed die 11 and external mold 2 by bolt, end mould
1 is equipped with elongated rubber press strip with the junction of internal model 7, being capable of effective mortar leakage prevention after compression is bolted；Bottom
11 panel of mould uses δ 12mm thick steel plate, material Q235B；Quality steel plate of the external mold 2 using 8mm thickness, material Q235B；In order to
Mortar leakage prevention is equipped with adhesive tape between external mold 2 and bed die 11, is conducive to the control of segment geometric dimension to be poured, and convenient for template
It removes；Internal model 7 is made of δ 8mm steel plate and ribbed stiffener.
After each component processing and manufacturing of template, examination spelling is carried out in factory, is foundation using box culvert construct figure, respectively to template
Each geometric dimension is checked, to meet construction requirement.Meanwhile in the case where meeting structure size requirement, to each hydraulic dynamic
Force system carries out no-load test, to examine each accuracy of action；
Wherein, internal model 7 hangs in framework of steel reinforcement before installing；11 installation accuracy of bed die requires highest, and when installation should be noted that following
Several points:
(1) 11 longitudinal midline of bed die is overlapped with track centerline；
(2) 11 cross central line of bed die is overlapped with 10 base plate center lines of pre-buried external mold hound；
(3) bed die 11 must securely, and template itself has enough rigidity.
The use of S2 template:
Template is installed on station as required, adjustment meets structure size requirement；
S3 steel bar meter and installation: including tie with reinforcing bar, the installation of hanging ring built-in fitting and positioning, concrete pad
The setting of arrangement and framework of steel reinforcement suspension centre.
Wherein, in tie with reinforcing bar box culvert segment reinforcing bar take first binding molding, again integral hoisting enter the mode of mould into
Row, binding sequence is successively are as follows: base plate steel bar binding, web reinforcement binding and roof steel bar binding；
The protective layer of framework of steel reinforcement is formed by the round mortar pad being mounted on framework of steel reinforcement, and the thickness of cushion block is pressed
25mm+2mm control.When installation, cushion block is arranged by blossom type, and spacing is no more than 1m, and with tied silk fixation, bottom plate and web
Junction suitably encrypts.Cushion block clean surface, cannot be by the pollution of greasy dirt, and cushion block color is consistent with structural concrete appearance,
Intensity requirement is not less than slab culvert concrete intensity；
The handling of S4 framework of steel reinforcement enters mould:
Bind molding framework of steel reinforcement it is qualified by inspection after i.e. Liftable, enter mould, lifting can be completed by gantry crane.To prevent
Deformation when framework of steel reinforcement lifts, is lifted by crane using special hanger multiple spot, the lifting lug on framework of steel reinforcement bent with the round steel of Φ 30 and
At the main reinforcement welding of lifting lug and framework of steel reinforcement, fusion length is not less than 16cm, and hands over the main reinforcement within the scope of lifting lug surrounding 60cm
Crunode carries out spot welding；Framework of steel reinforcement colour bar cloth or other coverings that mould casting concrete cannot be entered in time are covered,
It prevents from getting rusty after exposing to the sun and rain；
The installation of S5 internal model:
Internal model trolley 13 carries internal model 7 and moves into framework of steel reinforcement inner cavity, is opened up internal model 7 with rack-mount hydraulic system
Open form is at the prefabricated internal model of box culvert, then adjusts rod-adjurstable support, fixed internal model 7；
The installation of template when S6 casting concrete:
A. it after the completion of template spelling, polished template, smear release agent；
B. the elongation of oil cylinder 17 is folded by the external mold on external mold hound 10 and external mold 2 is adjusted to suitable position, measurement is outer
Framework of steel reinforcement is hung on bed die 11, is adjusted to suitable position by the verticality of mould 2；
C. by female end mould with gantry crane lifting in place, fastened with external mold 2 by Rapid connecting bolt；
D. start internal model trolley 13, internal model 7 is transported to suitable position together with nose mould, by the lifting of nose mould and outside
Mould 2 splices；
E. first internal model backform 7-1 is jacked in place by jacking cylinder 15, by internal model side form 7- after being fitted closely with end mould 1
2 rotate to suitable position by internal model side form oil cylinder 16, after being held out against internal model side form 7-2 with spiral strut 14, then by quick
Connection bolt fastens internal model 7 and end mould 1；
F. the fining twisted steel of drawing will be fixed, including external mold 2 with bed die 11 to drawing, external mold 2 and internal model side form
7-2 to drawing, between two pieces of external molds 2 to drawing；
G. finally by bolt verify one time, all bolt fastenings are good, after can casting concrete；
S7 concrete pours:
(1) bottom slab concreting
Respectively two layers of progress when bottom slab concreting, it is 25-40cm that every layer, which pours thickness control,；The vibrator as a plug that vibrates is
It is main, in the reinforcing bar compact district of bottom plate Yu web junction, 2 adhesion type high speed vibrator auxiliary vibrations are respectively installed additional at bottom plate both ends
It smashes.
Center is taken to pour when bottom slab concreting toward two sides, 10cm is reserved when pouring wouldn't pour completely, pour centainly to web
After height, then carries out feed supplement and pour；It is appropriate to reduce concrete slump 1-2cm and when pouring web, with prevent concrete to
Bottom plate turns over；
(2) web pours
Web uses the symmetrical blanking in both sides, and every side blanking side amount is 1m every time3, be equivalent to every layer concrete pour with a thickness of
30cm；The Shi Xianyong internal vibration stick that vibrates vibrates, and is then vibrated again with attached vibrator, what adhesion type vibrated
Opening time control are as follows: single vibrating time is no more than 30s, and every place adds up vibrating time and is no more than 60s；Vibrator as a plug
Based on ensure that concrete vibrating is closely knit, Surface Quality of Concrete is ensured with attached vibrator；
(3) top plate pours
For top plate without template, surrounding has the operating platform with guard rail, and top plate thickness 38cm divides two layers and pours, plug-in type vibration
It smashes device to vibrate, first floor concrete is all paved with, and the second layer is successively poured from centre to two sides, and wire rake plucking is used after initial set.
S8 concrete curing
Concreting should be conserved in time after completing initial set, after demoulding, contained section by bottom die trolley and directly moved into sunlight
Shed, sunlight shed 4cm × 8cm square steel and ∮ 20cm round steel form frame, are integrally sealed with transparent glassy sunlight tile
It closes, 10 ° high than ambient temperature of temperature of shed or so, to increase maintenance effect, steam is passed through with electric heating steam generator, to have
Effect utilizes steam, upper tubbiness plastic film is covered on box culvert segment as steam-cured cover, bottom is tied tight with elastic belt, and steam is led to
Enter box culvert segmented interior, reduce steam-cured space, play the role of improving efficiency and reduce energy consumption, contains section through detection and reach the strong of demoulding
Special beam strorage area is moved into gantry crane after degree and time requirement.
Wherein, steam curing by rest, heat up, constant temperature, cooling four-stage are controlled.
Rest the stage: the stage of resting is concreting after the completion to a period of time before steam supply heating.Teletostage severe cold
Weather should casting concrete at noon, and cover fluffy body in time, fill vapour and keep the temperature 5 DEG C or more, the time of resting is 3 hours.
Temperature rise period: using temperature of resting as starting point, feed air temperature speed control is in 15 DEG C/h, unsuitable too fast, temperature-rise period
Should be every 30 minutes test primary steam temperature and relative humidity (relative humidity is not preferably less than 90%), and carry out original record.
The constant temperature stage: thermostat temperature is not preferably greater than 50 DEG C, and relative humidity is not less than 95%, primary simultaneously every test in 60 minutes
Original record is carried out, constant temperature continues to meet demand of anti-crack to the intensity of concrete.
Temperature-fall period: when cooling, speed control is in 10 DEG C/h.
When removing steam-cured cover, steam-cured cover cannot be opened immediately, avoid causing concrete surface to go out because of excessive temperature differentials
Steam-cured cover both ends should first be opened and carry out case room ventilation by now contraction crack, be down to culvert body surface temperature slowly and nature
After the temperature difference of temperature is less than 15 DEG C, then steam-cured cover is removed, and box culvert surface and its inner cavity are covered.
S9 form removable
Slab culvert concrete is after maintenance reaches 50% (25MPa) of its design strength, form removal；Form removable sequence
Are as follows: 7 dismountings of internal model → end 1 dismounting of the mould → dismounting of external mold 2 → newly pouring box culvert moves on to health position, it specifically includes: first removing internal model
The Rapid connecting bolt and screw of spiral strut 14 and internal model 7 and end mould 1 between side form 7-2 and internal model trolley 13, it is then sharp
Internal model 7, starting are shunk with the hydraulic device (including internal model side form oil cylinder 16, jacking cylinder 15 and spiral strut 14) of inner formwork system
Internal model trolley 13 removes internal model 7；The end mould 1 of 13 side of internal model trolley directly hangs the ox on internal model trolley 13 with gantry crane
On leg, the end mould 1 of the other side is hung in above reserved vacant lot using gantry crane；Unclamp the Screw arbor with nut at both-ends of 2 top opening of external mold and base opening
And the connection bolt between external mold 2 and bed die 11, end mould 1, folding oil cylinder 17 using the external mold on external mold hound 10 will be outer
Mould 2 and concrete surface are detached from；By bottom die trolley track 4 by bottom die trolley 8 move to newly pour contain section under, will newly pour contain section move on to it is feeding
Raw position.
The present invention is furture elucidated combined with specific embodiments below, it should be understood that these embodiments be merely to illustrate the present invention and
It is not used in and limits the scope of the invention, after the present invention has been read, those skilled in the art are to various shapes of equal value of the invention
The modification of formula falls within the application range as defined in the appended claims.
Claims (10)
1. a kind of hydraulic box culvert template of assembled characterized by comprising template, hydraulic power system and adjusting support；It is described
Template includes bed die, external mold, end mould and internal model；The hydraulic power system includes bottom die trolley and internal model trolley；The adjusting
Support includes internal model trolley, bed die bracket and the support of external mold hydraulic system.
2. the hydraulic box culvert template of assembled according to claim 1, it is characterised in that: the internal model include internal model backform and
Internal model side form.
3. the hydraulic box culvert template of assembled according to claim 1, it is characterised in that: the end mould includes nose mould, recessed
Hold mould and flush end mould.
4. the hydraulic box culvert template of assembled according to claim 1, it is characterised in that: the end mould and internal model, bed die and
External mold is bolted.
5. the hydraulic box culvert template of assembled according to claim 1, it is characterised in that: the end mould is placed in bed die side,
The internal model is placed in inside front and rear ends mould, and the external mold is placed in end mould external juxtaposition between front and rear ends mould.
6. the hydraulic box culvert template of assembled according to claim 1, it is characterised in that: external mold bottom die height with
Bed die height is consistent.
7. a kind of construction party of the prefabricated assembled box culvert of the hydraulic box culvert template of assembled as claimed in any one of claims 1 to 6
Method, it is characterised in that: the following steps are included:
The hydraulic box culvert template installation of S1 assembled: it is successively installed according to the sequence of bed die, external mold, end mould and internal model；
The use of S2 template: template is installed on station as required, adjustment meets structure size requirement；
S3 steel bar meter and installation: including tie with reinforcing bar, the installation of built-in fitting and positioning, the arrangement of concrete pad and steel
The setting of tendons skeleton suspension centre；
The handling of S4 framework of steel reinforcement enters mould: will bind molding framework of steel reinforcement lifting, enters mould；
The installation of S5 internal model: internal model internal model trolley is moved into framework of steel reinforcement inner cavity；
The installation of template when S6 casting concrete；
S7 concrete pours: pouring including bottom slab concreting, web and pours with top plate；
S8 concrete curing；
S9 form removable.
8. construction method according to claim 7, it is characterised in that: template when casting concrete described in step S6
Installation the following steps are included:
A. after the completion of template spelling, release agent is smeared after polishing template；
B. oil cylinder elongation is folded by the external mold on external mold hound and external mold is adjusted to suitable position, measure the vertical of external mold
Degree, framework of steel reinforcement is hung on bed die, suitable position is adjusted to；
C. in place by the lifting of female end mould, fastened with external mold；
D. start internal model trolley, internal model is transported to suitable position together with nose mould, nose mould and external mold are spliced；
E. in place by the jacking of internal model backform, fitted closely with end mould, after internal model side form rotated into suitable position, by internal model side form
After holding out against, by internal model and end mould fastening；
F. fining twisted steel is fixed and is completed to drawing；
G. bolt is verified and fastens after-pouring concrete.
9. construction method according to claim 7, it is characterised in that: jacking described in step e is completed by jacking cylinder,
The rotation is completed by internal model side form oil cylinder, and described hold out against is completed by spiral strut, and the fastening uses quickly connect spiral shell
Bolt is completed.
10. construction method according to claim 7, it is characterised in that: include external mold and bed die to drawing described in step f
To drawing, external mold and internal model side form to draw and two pieces of outer intermodes to drawing.
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| CN114393670A (en) * | 2021-11-24 | 2022-04-26 | 中交二公局萌兴工程有限公司 | Prefabricated box culvert process and assembling method |
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