CN107794844A - A kind of viaduct curve anti-collision wall is logical across precast construction method - Google Patents
A kind of viaduct curve anti-collision wall is logical across precast construction method Download PDFInfo
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- CN107794844A CN107794844A CN201711042326.0A CN201711042326A CN107794844A CN 107794844 A CN107794844 A CN 107794844A CN 201711042326 A CN201711042326 A CN 201711042326A CN 107794844 A CN107794844 A CN 107794844A
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- collision wall
- box beam
- height
- outer side
- box
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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
Abstract
It is logical across precast construction method the invention discloses a kind of viaduct curve anti-collision wall, it is characterised in that this method includes following construction process：The spring quantum and overall dimensions that box girder tensioning mud jacking complete → moves to box beam under the prefabricated place of anti-collision wall → measurement box girder tensioning → setting control line according to the actual condition after box beam erection → install correction → interior side form in box beam upper bracket construction → reinforcing bar colligation → pipeline and install correction → outer side mold installation correction → casting concrete.Technical solution of the present invention is to improving efficiency, reduction loss, avoiding the interference to environment from having remarkable result, the present invention not only simplifies working procedure, improve efficiency of construction, can also preferably ensure the globality of anti-collision wall and main body box-beam structure, also ensure that anti-collision wall overall line style is smooth and presentation quality.
Description
Technical field
The invention belongs to field of bridge construction, and in particular to a kind of viaduct curve anti-collision wall is logical across precast construction method.
Background technology
With the fast development of overhead road of city highway, the landscape of modern city is higher to the appearance requirement of bridge, anti-collision wall
As the safety prevention measure of sky way bridge, its peculiar direction of traffic structure curve, the quality buffer vehicle of armored concrete
Impulsive force, safety coefficient is improved, protect people's lives and properties.At present, anti-collision wall main construction techniques are still traditional entirety
Cast-in-place, site operation pours and many influences is caused on surrounding environment and road traffic, and low construction efficiency, and loss is high, and
Traditional pours the problems such as mode often causes the color and luster of overall anti-collision wall, quality is uneven.
The content of the invention
For problems of the prior art, the present invention provides a kind of viaduct curve anti-collision wall and leads to across prefabricated construction side
It method, can preferably ensure the globality of anti-collision wall and main body box-beam structure, while also ensure that anti-collision wall streamline is smooth and attractive in appearance.
To achieve the above object, the present invention uses following technical scheme：
A kind of viaduct curve anti-collision wall is logical to include following construction process across precast construction method, this method：Box girder tensioning mud jacking
The spring quantum and overall dimensions complete → moved to box beam under the prefabricated place of anti-collision wall → measurement box girder tensioning → according to box beam frame
If actual condition after sets control line → in box beam upper bracket construction → reinforcing bar colligation → pipeline installation correction → interior side form peace
Fill correction → outer side mold installation correction → casting concrete.
The setting control line includes surveying setting-out and vertical control survey,
Surveying setting-out is the control line by drawing measuring anti-collision wall, absolute altitude control line is set on anti-collision wall reserved steel bar, strictly
The linear and absolute altitude of anti-collision wall is controlled, by the use of the structure centre line of total powerstation measuring box beam as the datum line for controlling internal model, simultaneously
Actual measurement actual quantities is carried out to the spring quantum of box beam, is easy to be adjusted in installation form, specifically includes following steps：
Step 1, cloth observing and controlling net, the place placement control point of spaciousness is selected, horizontal angle is observed using survey time method, seen with total powerstation
Survey and record the three-dimensional coordinate of the horizontal range and two control point A, B between adjacent two control points A, B,
Step 2, the control of box beam levelness, by the design attitude of anti-collision wall, the inside and outside boundary line of anti-collision wall is scheduled box beam
On top surface, and mark, inside and outside two boundary lines released per side anti-collision wall,
According to design requirement, the live anti-collision wall gradient is simulated, according to the operation principle of horizontal line of sight in spirit level, according to level
The measured value of chi, height value a, b of control point A, B point-to-point transmission are read, calculates the difference in height h between control point A, BAB, it is determined that
Measuring whether is needed to go out the corresponding gradient, according to the discrepancy in elevation h measuredABThe height of box beam bottom adjustable backing plate is adjusted until control
Point carries out leveling on the same water surface, by box beam bottom, if necessary to the side gradient, according to design requirement, using adjustable
Steel plate, the gradient is corrected in measurement, until there is the corresponding gradient of corresponding box beam,
Step 3, the control of box beam absolute altitude, total powerstation is placed on survey station control point, anticollision is carried to every Pin after centering, leveling
The box beam of wall enters the level measurement of cross girders face, measures 2 points of A, B height respectively, and the height for measuring prism is h0, obtains every Pin casees
The actual height h1 of beam, the actual height of every Pin box beams and design height are relatively drawn into difference, the difference is then adjustable pad
Plate needs the height that adjusts, enters the level measurement of cross girders face to box beams of every Pin with anti-collision wall, facilitate anticollision wall form adjust to
Corresponding height to ensure that the whole height of box beam and anti-collision wall meets design specification,
Site information is surveyed to set：Into survey station point information-feeding screen curtain, the details of the survey station point are inputted：Period, instrument height,
Period is encoded and confirmed,
Backsight point information is set：Into backsight point information-feeding screen curtain, backsight period is inputted, after backsight point calibration is completed, is opened
Beginning detail point measures.Detail point is encrypted in order to ensure to pour the presentation quality of rear anti-crash wall, during measurement, 2m mono- is pressed per Pin box beams
Individual point measures,
Step 4, anti-collision wall level measurement, level measurement is carried out to every Pin anti-collision walls using total powerstation 10 according to step 3, surveyed respectively
2 points of A, B height is obtained, the height for measuring prism is h0, obtains the actual height h2 of every Pin anti-collision walls, by every Pin anti-collision walls
Actual height relatively draws difference with design height, and the difference then needs the height adjusted for adjustable backing plate, in anti-collision wall
After the completion of internal model and the equal formwork of external mold, anti-collision wall absolute altitude repetition measurement is carried out, if after repetition measurement, the actual height and design height of anti-collision wall
Error more than 2mm, then need to readjust adjustable backing plate height, until error is in the range of 2mm.
Following steps are specifically included in the construction of box beam upper bracket：
Step 1, template construct, anti-collision wall are made up of outer side mold and inner side mould, and the outer side mold and interior side form are punching block, outside
The bottom of mould is provided with regulation screw mandrel, regulation tensioning screw rod is provided between outer side mold and box girder web, in the bottom of the interior side form
Internal model adjusting screw rod is provided between box beam, pull bar is provided between interior side form and box beam upper surface, is provided with below box beam vertical
Bar, the outer side mold are fixedly connected with the top of interior side form by Screw arbor with nut at both-ends, are set according to actual design drawing on outer side mold
The position such as convex portion or recess, lamppost, marker post is put, outer steel formwork is made the devices such as corresponding structure i.e. convex portion, electronic box and existed
Consider on the punching block of inner side, the single-unit length of curve anti-collision wall medial and lateral punching block designs by 1 meter, is easy to control the entirety of anti-collision wall
Line style.
Step 2, model sheetinstallat, first, the installation of side form in progress, according to anti-collision wall top surface absolute altitude and the internal model set is put
Datum line, with pull bar respectively with interior side form is suitable for reading and box beam top surface in built-in fitting consolidate, while strengthen internal side form perpendicularity
Correction；Then, the installation of outer side mold is carried out, by the steel bracket platform of setting type, while installation and adjustment screw mandrel, will with lifting appliance
Outer side mold is hung to steel bracket platform, and lower mouth is withstood with regulation screw mandrel, and the locating slot suitable for reading with interior side form with Screw arbor with nut at both-ends suitable for reading is tight
Gu the absolute altitude of outer side mold adjusts screw mandrel by lower mouth and is adjusted, while utilizes the connector and outside reserved at box girder web
Fastened under mould between mouth positioning hole with regulation tensioning screw rod, it is ensured that the perpendicularity and installation dimension of external mold.
The inner side Mould Breadth degree for including convex portion and/or recess is 1 meter, in installation during side form to box beam spring quantum by using interior
The internal model adjusting screw rod of mouth is adjusted under side form.According to so that directly for Qu Yuanli, curve anti-collision wall mould is different from 2 meters long common
Straight line anti-collision wall wall mould, curve anti-collision wall are intended assembled close to curve according to directly averagely to grow 1 meter for Qu Yuanli with short straight line.
The distance between adjacent regulation tensioning screw rod is 1 meter on the outer side mold.
Horizontal slice is poured during the casting concrete, is not more than 30cm per thickness degree, when upper and lower two interlayer pours
Between shorten when should use up, the vibrating head of immersion vibrator is extend at lower-layer concrete 5cm, casting concrete uses plug-in type
Vibrator is consolidated, and concrete inserts after entering mould immediately following vibrator, and vibrator operating radius is not to be exceeded in ranks spacing of vibrating
1.5 times, concrete mixing time is no less than 90 seconds, and the slump is stable, when pouring whole plane section range level be layered into
Row pours, and is not more than 30cm per thickness degree, after concreting to top surface, unnecessary laitance is removed, is first compacted, is closed flat, treat
Floating, receipts light is carried out before concrete initial set, and no less than twice, then, concrete is covered into water seasoning one week with geotextiles,
Remain moisture state.
Compared with prior art, beneficial effects of the present invention are：
Technical solution of the present invention is to improving efficiency, reduction loss, avoiding the interference to environment from having remarkable result, and the present invention is not only
Simplify working procedure, improve efficiency of construction, can also preferably ensure the globality of anti-collision wall and main body box-beam structure, also ensure that anti-
Hit wall overall line style is smooth and presentation quality.
Brief description of the drawings
Fig. 1 is the schematic diagram of elevation observing and controlling in cloth observing and controlling net in the present invention.
Fig. 2 is the measurement structural representation of box beam absolute altitude in the present invention.
Fig. 3 is the measurement structural representation of anti-collision wall absolute altitude in the present invention.
Fig. 4 is the mounting structure schematic diagram of interior side form and outer side mold in the present invention.
Embodiment
As Figure 1-Figure 4, curve anti-collision wall in the present embodiment viaduct is logical includes following across precast construction method, this method
Construction process：Spring quantum that box girder tensioning mud jacking complete → moves to box beam under the prefabricated place of anti-collision wall → measurement box girder tensioning and
Overall dimensions → according to the actual condition after box beam erection set control line → in box beam upper bracket construction → reinforcing bar colligation → pipe
Line installation correction → interior side form installation correction → outer side mold installation correction → casting concrete.
Control line is set to include surveying setting-out and vertical control survey described in the present embodiment,
Surveying setting-out is the control line by drawing measuring anti-collision wall, absolute altitude control line is set on anti-collision wall reserved steel bar, strictly
The linear and absolute altitude of anti-collision wall is controlled, by the use of the structure centre line of total powerstation measuring box beam as the datum line for controlling internal model, simultaneously
Actual measurement actual quantities is carried out to the spring quantum of box beam, is easy to be adjusted in installation form, specifically includes following steps：
Step 1, cloth observing and controlling net, the place placement control point of spaciousness is selected, horizontal angle is observed using survey time method, with total powerstation 10
Observe and record the three-dimensional coordinate of the horizontal range and two control point A, B between adjacent two control points A, B,
Step 2, the control of box beam levelness, by the design attitude of anti-collision wall, the inside and outside boundary line of anti-collision wall is scheduled box beam
On top surface, and mark, inside and outside two boundary lines released per side anti-collision wall,
According to design requirement, the live anti-collision wall gradient is simulated, according to the operation principle of horizontal line of sight in spirit level 12, according to water
The measured value of object staff 11, height value a, b of control point A, B point-to-point transmission are read, calculates the difference in height h between control point A, BAB,
Determine the need for measuring and go out the corresponding gradient, according to the discrepancy in elevation h measuredABAdjust the height of box beam bottom adjustable backing plate until
Control point carries out leveling on the same water surface, by box beam bottom, if necessary to the side gradient, according to design requirement, using can
The steel plate of regulation, the gradient is corrected in measurement, until there is the corresponding gradient of corresponding box beam,
Step 3, the control of box beam absolute altitude, total powerstation is placed on survey station control point, anticollision is carried to every Pin after centering, leveling
The box beam of wall enters the level measurement of cross girders face, measures 2 points of A, B height respectively, and the height for measuring prism 13 is h0, obtains every Pin
The actual height h1 of box beam, the actual height of every Pin box beams and design height are relatively drawn into difference, the difference is then adjustable
Backing plate needs the height adjusted,
Step 4, anti-collision wall level measurement, level measurement is carried out to every Pin anti-collision walls using total powerstation 10 according to step 3, surveyed respectively
2 points of A, B height is obtained, the height for measuring prism 13 is h0, obtains the actual height h2 of every Pin anti-collision walls, will be per Pin anti-collision walls
Actual height and design height relatively draw difference, the difference then needs the height adjusted for adjustable backing plate, in anti-collision wall
Internal model and the equal formwork of external mold after the completion of, carry out anti-collision wall absolute altitude repetition measurement, if after repetition measurement, the actual height of anti-collision wall is high with design
The error of degree then needs to readjust adjustable backing plate height, until error is in the range of 2mm more than 2mm.
The present embodiment specifically includes following steps in the construction of box beam upper bracket：
Step 1, template construct, anti-collision wall are made up of outer side mold 1 and interior side form 2, and the outer side mold 1 and interior side form 2 are punching block,
The bottom of outer side mold 1 is provided with regulation screw mandrel 9, regulation tensioning screw rod 4 is provided between outer side mold 1 and the web of box beam 3, in the inner side
Internal model adjusting screw rod 5 is provided between the bottom of mould and box beam 3, pull bar 6 is provided between interior side form 2 and the upper surface of box beam 3, in case
The lower section of beam 3 is provided with vertical rod 7, and the outer side mold 1 is fixedly connected with the top of interior side form 2 by Screw arbor with nut at both-ends 8, according to actual design
Drawing sets convex portion or recess on outer side mold 1,
Step 2, model sheetinstallat, first, the installation of side form 2 in progress, according to anti-collision wall top surface absolute altitude and the internal model base set is put
Directrix, with pull bar 6 respectively with interior side form 2 is suitable for reading and box beam top surface in built-in fitting consolidate, while strengthen the internal perpendicularity of side form 2
Correction；Then, the installation of outer side mold 1 is carried out, by the steel bracket platform of setting type, while installation and adjustment screw mandrel 9, use lifting appliance
Outer side mold 1 is hung to steel bracket platform, lower mouth regulation screw mandrel 9 is withstood, it is suitable for reading with Screw arbor with nut at both-ends 8 with interior side form 2 is suitable for reading determines
Position groove fastening, the absolute altitude of outer side mold 1 adjusts screw mandrel 9 by lower mouth and is adjusted, while is plugged into using what is reserved at box girder web
Fastened between 1 lower mouthful of positioning hole of device and outer side mold with regulation tensioning screw rod, it is ensured that the perpendicularity and installation dimension of outer side mold.
Preferably, the inner side Mould Breadth degree that the present embodiment includes convex portion and/or recess is 1 meter, in installation during side form pair
Box beam spring quantum is adjusted by using the internal model adjusting screw rod 5 of mouth under interior side form；On outer side mold it is adjacent regulation tensioning screw rod it
Between distance be 1 meter.It is bent according to so that directly for Qu Yuanli, curve anti-collision wall mould is different from 2 meters long generic linear anti-collision wall mould
Line anti-collision wall is intended assembled close to curve according to directly averagely to grow 1 meter for Qu Yuanli with short straight line.
Horizontal slice is poured during casting concrete described in the present embodiment, is not more than 30cm per thickness degree, upper and lower two layers
Between pour the time and shorten when should use up, the vibrating head of immersion vibrator is extend at lower-layer concrete 5cm, casting concrete is adopted
Consolidated with poker vibrator, concrete inserts after entering mould immediately following vibrator, and vibrator is not to be exceeded in ranks spacing of vibrating
1.5 times of operating radius, concrete mixing time are no less than 90 seconds, and the slump is stable, in whole plane section scope water when pouring
Divide layer equally to be poured, be not more than 30cm per thickness degree, after concreting to top surface, unnecessary laitance is removed, first compacting,
It is closed flat, carries out floating, receipts light before treating concrete initial set, and no less than twice, then, concrete is supported with geotextiles covering watering
Shield one week, remains moisture state.
Although above-described embodiment makes specific descriptions to the present invention, come for one of ordinary skill in the art
Say, it is understood that can be modified within the spirit and scope for not departing from the present invention based on present disclosure
Or improve, these modification and improvement are all within the spirit and scope of the present invention.
Claims (6)
1. a kind of viaduct curve anti-collision wall is logical across precast construction method, it is characterised in that this method includes following construction process：
The spring quantum and overall dimensions that box girder tensioning mud jacking complete → moves to box beam under the prefabricated place of anti-collision wall → measurement box girder tensioning
→ actual condition after being set according to box beam sets control line → corrects in box beam upper bracket construction → reinforcing bar colligation → pipeline installation
→ interior side form installation correction → outer side mold installation correction → casting concrete.
2. curve anti-collision wall in viaduct according to claim 1 is logical across precast construction method, it is characterised in that the setting
Control line includes surveying setting-out and vertical control survey,
Surveying setting-out is the control line by drawing measuring anti-collision wall, absolute altitude control line is set on anti-collision wall reserved steel bar, strictly
The linear and absolute altitude of anti-collision wall is controlled, by the use of the structure centre line of total powerstation measuring box beam as the datum line for controlling internal model, simultaneously
Actual measurement actual quantities is carried out to the spring quantum of box beam, is easy to be adjusted in installation form, specifically includes following steps：
Step 1, cloth observing and controlling net, the place placement control point of spaciousness is selected, horizontal angle is observed using survey time method, uses total powerstation
（10）Observe and record the three-dimensional coordinate of the horizontal range and two control point A, B between adjacent two control points A, B,
Step 2, the control of box beam levelness, by the design attitude of anti-collision wall, the inside and outside boundary line of anti-collision wall is scheduled box beam
On top surface, and mark, inside and outside two boundary lines released per side anti-collision wall,
According to design requirement, the live anti-collision wall gradient is simulated, according to horizontal line of sight in spirit level（12）Operation principle, according to
Levelling rod（11）Measured value, read control point A, B point-to-point transmission height value a, b, calculate the difference in height between control point A, B
hAB, it is determined whether need measuring to go out the corresponding gradient, according to the discrepancy in elevation h measuredABAdjust the height of box beam bottom adjustable backing plate
Until control point carries out leveling on the same water surface, by box beam bottom, if necessary to the side gradient, according to design requirement, profit
With adjustable steel plate, the gradient is corrected in measurement, until there is the corresponding gradient of corresponding box beam,
Step 3, the control of box beam absolute altitude, total powerstation is placed on survey station control point, anticollision is carried to every Pin after centering, leveling
The box beam of wall enters the level measurement of cross girders face, measures 2 points of A, B height respectively, measures prism（13）Height be h0, obtain every
The actual height h1 of Pin box beams, the actual height of every Pin box beams and design height are relatively drawn into difference, the difference is then to be adjustable
Section backing plate needs the height adjusted,
Step 4, anti-collision wall level measurement, total powerstation is used according to step 3（10）Level measurement is carried out to every Pin anti-collision walls, respectively
2 points of A, B height is measured, measures prism（13）Height be h0, obtain the actual height h2 of every Pin anti-collision walls, will prevent per Pin
The actual height and design height for hitting wall relatively draw difference, and the difference then needs the height adjusted for adjustable backing plate, anti-
After the completion of hitting internal model and the equal formwork of external mold of wall, anti-collision wall absolute altitude repetition measurement is carried out, if after repetition measurement, the actual height of anti-collision wall is with setting
The error of height is counted more than 2mm, then needs to readjust adjustable backing plate height, until error is in the range of 2mm.
3. curve anti-collision wall in viaduct according to claim 1 is logical across precast construction method, it is characterised in that in box beam
Rack construction specifically includes following steps：
Step 1, template construct, anti-collision wall is by outer side mold（1）With interior side form（2）Composition, the outer side mold（1）With interior side form（2）
It is punching block, outer side mold（1）Bottom be provided with regulation screw mandrel（9）, outer side mold（1）And box beam（3）Regulation is provided between web
Draw screw rod（4）, in the bottom of the interior side form and box beam（3）Between be provided with internal model adjusting screw rod（5）, in interior side form（2）And case
Beam（3）Pull bar is provided between upper surface（6）, in box beam（3）Lower section is provided with vertical rod（7）, the outer side mold（1）With interior side form（2）
Top pass through Screw arbor with nut at both-ends（8）It is fixedly connected, according to actual design drawing in outer side mold（1）Upper setting convex portion or recess,
Step 2, model sheetinstallat, first, side form in progress（2）Installation, according to anti-collision wall top surface absolute altitude and put the internal model set
Datum line, use pull bar（6）Respectively with interior side form（2）Built-in fitting consolidates in suitable for reading and box beam top surface, while strengthens internal side form（2）
The correction of perpendicularity；Then, outer side mold is carried out（1）Installation, by the steel bracket platform of setting type, while installation and adjustment screw mandrel
（9）, with lifting appliance by outer side mold（1）It is hung to steel bracket platform, lower mouth regulation screw mandrel（9）Withstand, it is suitable for reading to use Screw arbor with nut at both-ends
（8）With interior side form（2）Locating slot fastening suitable for reading, outer side mold（1）Absolute altitude pass through lower mouth adjust screw mandrel（9）It is adjusted, together
The connector and outer side mold reserved at Shi Liyong box girder webs（1）Fastened between lower mouth positioning hole with regulation tensioning screw rod,
Ensure the perpendicularity and installation dimension of outer side mold.
4. curve anti-collision wall in viaduct according to claim 3 is logical across precast construction method, it is characterised in that includes convex
The inner side Mould Breadth degree of portion and/or recess is 1 meter, and box beam spring quantum is adjusted by using the internal model of mouth under interior side form during side form in installation
Save screw rod（5）It is adjusted.
5. curve anti-collision wall in viaduct according to claim 3 is logical across precast construction method, it is characterised in that the outside
The distance between adjacent regulation tensioning screw rod is 1 meter on mould.
6. curve anti-collision wall in viaduct according to claim 1 is logical across precast construction method, it is characterised in that described to pour
The vibrating head of immersion vibrator is extend at lower-layer concrete 5cm during concrete, casting concrete uses internal vibration
Device is consolidated, and concrete inserts after entering mould immediately following vibrator, and ranks spacing of vibrating is not to be exceeded the 1.5 of vibrator operating radius
Times, concrete mixing time is no less than 90 seconds, and the slump is stable, is poured when pouring in the layering of whole plane section range level
Build, be not more than 30cm per thickness degree, after concreting to top surface, unnecessary laitance is removed, is first compacted, is closed flat, treat coagulation
Floating, receipts light is carried out before native initial set, and no less than twice, then, concrete is covered into water seasoning one week with geotextiles, all the time
Keep moisture state.
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| CN112917669A (en) * | 2021-02-09 | 2021-06-08 | 浙江交工集团股份有限公司 | Synchronous prefabrication integral construction process for precast beam top anti-collision wall |
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| CN112267567A (en) * | 2020-09-02 | 2021-01-26 | 中建三局集团有限公司 | Synchronous construction method for SRC column and outer frame structure of super high-rise building |
| CN112267567B (en) * | 2020-09-02 | 2022-06-14 | 中建三局集团有限公司 | Synchronous construction method for SRC column and outer frame structure of super high-rise building |
| CN112917669A (en) * | 2021-02-09 | 2021-06-08 | 浙江交工集团股份有限公司 | Synchronous prefabrication integral construction process for precast beam top anti-collision wall |
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