CN103669223B - Column rib type guard bar board construction method for continuous concave structure - Google Patents
Column rib type guard bar board construction method for continuous concave structure Download PDFInfo
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Abstract
The invention relates to the field of municipal engineering, and aims at providing a column rib type guard bar board construction method for a continuous concave structure. The method comprises the following steps of preparing before construction, staking out in survey, steel bar manufacturing and installing, formwork designing and machining, formwork installing and correcting, concrete pouring, formwork dismounting and the like. The method is suitable for the field pouring construction of column rib type guard bar boards of railway, urban mass transit and the like, and has strong adaptability especially for road striding and river striding construction field engineering and other construction field limited engineering.
Description
Technical field
The present invention relates to municipal engineering technical field, specifically, is a kind of rib of column formula guardrail board construction method of continuous concave structure.
Background technology
The overhead anticollision barrier in traditional cities only needs high about 1.2 meters usually, the basic structure adopting half convex of design, construction technology is relatively simple, ripe, and conduct emerging light rail transit in the last few years, due to will communication be considered, the requirement of electric power and sound insulation noise abatement, require generally all will reach 2.4 meters to the design height of its guardrails of both sides plate, structurally adopt " rib of column formula ", " recessed " word structure in continuous print, consider evacuation platform demand simultaneously, the capping beam that 50-60cm is thick is also established usually in top, therefore difficulty of construction is very large, such as to the how installation and removal of exterior sheathing, how to specify with embedded bar and manufacture, it is all new problem urgently to be resolved hurrily in the construction of modern light rail traffic guardrail.
Summary of the invention
The present invention is to solve deficiency of the prior art, in conjunction with engineering experience in the past and the rib of column formula guardrail board construction method of a kind of continuous concave structure summed up.
For achieving the above object, the present invention's technical scheme of being is as follows:
A rib of column formula guardrail board construction method for continuous concave structure, is characterized in that, comprise the following steps:
(1) prepare before construction, comprise fork truck transformation and manufacture Hanging Basket and cradle vehicle;
(2) surveying and locating, comprises guardrail board absolute altitude and controls and horizontal alignment control;
(3) reinforcement fabrication is installed, and point two parts carry out, pre-buried guardrail board column reinforcing bar when Part I is cast-in-situ box girder, and Part II is distribution reinforcement and capping beam reinforcing bar;
(4) stencil design processing and installation correct, and comprise external mold and internal mold; Erection sequence is: first fix internal mold, then installs No. 10 channel-section steels, relocates exterior sheathing;
(5) concreting;
(6) form removable.
Fork truck transformation in described step (1): be change fork truck tire into solid tire by pneumatic tire, fork will be shoveled above simultaneously and be transformed into suspension hook, for steel form handling and dismounting; For fork truck principal arm hoisting depth, 2 times that should be decided to be the design height of guardrail board increase by 0.8 ~ 1.2m again;
Described manufacture Hanging Basket: be the Hanging Basket with a Φ 32 reinforcement welding 0.6m × 2.0m × 1.1m, the fixing and demolition of external mold bolt when constructing for guardrail board;
Described manufacture cradle vehicle: be the cradle vehicle of welding a 2.3m × 2.0m × 2.5m with No. 10 channel-section steels; Cradle vehicle chooses brachium 2.6m, top mast height 1.4m, and configures the wheel of diameter 0.5m in corner, facilitates cradle vehicle to move on bridge floor; Cradle vehicle rear portion arranges a ballast box, chooses arm, Hanging Basket and working load to balance.
Guardrail board absolute altitude in described step (2) controls: be before building breast board concrete, the main muscle of breast board reinforcing bar arranges the spacing mark of absolute altitude, and concreting is flat with mark; Spacing mark adopts the obvious adhesive tape of color to be rolled on breast board embedded bar, every 3 meters of sections, each section 4 points;
Described horizontal alignment controls: guardrail board plane survey provides left and right line curve element according to design, calculates the plane coordinates wanting setting-out, surveying and locating template sideline; For straightway, every 10 meters of points; For curved section, linearly smooth and easy for ensureing, every 3 ~ 5 meters of points.
Distribution reinforcement in described step (3) and the erection sequence of capping beam reinforcing bar are: upper back, first bottom, and first inside outer rear flank, the main muscle of first colligation colligation stirrup again, muscle colligation horizontal bar is again indulged in first colligation.
Template external mold in described step (4) adopts sizing punching block, and internal mold adopts truss punching block, panel 5mm steel plate, and stiffening rib adopts No. 5 (b × d × r:50mm × 6mm × 5.5mm) angle steel and steel band; Paste with foam double-sided tape between steel form, and with bolt, template is connected.
Concreting in described step (5) can should be carried out after internal mold lower feet foam filling agent is bubbled 1 hour; Build the order of building from case beam one end to the other end to carry out; One should be continuous across the breast board concreting operation of case beam, and must not interrupt, concrete color must be consistent.
Form removable in described step (6) be concrete strength reach design strength more than 50% and complete build 16 hours after carry out; Dismounting order is by first installing rear dismounting, and the order that rear installation is first removed is carried out, and namely first removes external mold, then tears internal mold open.
As a modification of the present invention, in the installation of described template: own wt is passed to case beam by the timber wedge block of beneath placement by internal mold, the embedded bar that recycling implants bridge floor fixes internal mold by " one the one is drawn " stress system between steel pipe and wire rope turnbuckle; External mold is by turnbuckle fork truck gone to below channel-section steel, by tightening the connecting bolt between Screw arbor with nut at both-ends bolt and steel form, makes external mold stationary positioned;
Being corrected to of described template: external mold first carries out the correction of internal mold before installing, by adjusting wooden adjustment of wedge internal mold absolute altitude; By adjustment steel pipe adjustable tray and turnbuckle length adjustment internal mold verticality, and check with plumb line; External mold absolute altitude adjusts mainly through the turnbuckle below channel-section steel, simultaneously by the verticality of adjustment Screw arbor with nut at both-ends length adjustment external mold.
As a modification of the present invention, described dismounting first utilizes cradle vehicle to loosen fastening bolt, unloads Screw arbor with nut at both-ends; Be transferred to stressed for outer side mold on fork truck by channel-section steel again, and by fork truck, outer side mold hung to bridge floor, side form in finally removing.
Engineering method of the present invention is applicable to the cast-in-place construction of the rib of column such as railway, urban track traffic formula guardrail board, particularly has more very strong applicability to across the restricted engineering in the construction plant such as road, cross a river.Compare existing construction technology, the present invention can summarize from following 3 aspects:
One, economic benefit
Except the construction technology of " suspension " of the present invention formula, the construction for guardrail board also has " prefabrication+in-site installation " and " full framing+cast in situs " two kinds.Carry out measuring and calculating by the expense of the every linear meter(lin.m.) guardrail board of construction to analyze, " prefabrication+in-site installation " technique mainly comprises prefabrication transport cost 1350 yuan and in-site installation takes 320 yuan, adds up to 1670 yuan; " full framing+cast in situs " technique mainly comprises basement process and support sets up expense 544 yuan and cast in situs expense 759 yuan, adds up to 1303 yuan; And " suspension " construction technology of this engineering method eliminates transport cost in " prefabrication+in-site installation " technique and in-site installation expense, eliminate basement process in " full framing+cast in situs " technique and expense set up by support, its expense only needs 900 yuan.Therefore relative " prefabrication+in-site installation " and " full framing+cast in situs " technique, the economic benefit of " suspension " construction technology of engineering method of the present invention is more remarkable.
Two, duration benefit
Adopt " full framing+cast in situs " technique, owing to basement process need be carried out and the work of tearing open taken by support, under the prerequisite that resource input is suitable, its 60m guardrail board of often constructing at least needs 5 days, and adopting " suspension " of the present invention technique, construction 60m guardrail board only needs 1 day, and duration benefit is fairly obvious.For across the limited special road section of the traffic such as road, cross a river, the convenience of " suspension " technique is embodied more.
Adopt " prefabrication+in-site installation " technique, because guardrail board can be prefabricated in advance in factory, its prefabricated construction progress can not affect by site operation, but its in-site installation part is owing to watering after need " connecting dark beam " (prefabricated guardrail board is linked to be entirety), its about 60m/ days that constructs; And adopting " suspension " of the present invention technique also can ensure to construct 60m every day, top can reach 90m every day, and therefore these two kinds of construction technology construction speeds can maintain an equal level substantially.
Three, quality and benifit
Be set shaped steel formwork due to what adopt in the present invention, and steel form adopts batch production processing, size strictly carries out makings processing by design drawing, and its rigidity, intensity all through tightly calculating, thus ensure that guardrail board entity quality; Compared to wooden model or bamboo slab rubber, have more smooth surface, planeness high, without the fissure of displacement, the few quality advantages of higher of piece.
Figure of description
Fig. 1 is the structural representation of the rib of column formula guardrail board of continuous concave structure in the present invention.
Fig. 2 is the B-B face sectional view in Fig. 1.
Fig. 3 is the A-A face sectional view in Fig. 1.
Fig. 4 is the structural representation of Hanging Basket and cradle vehicle.
Fig. 5 is the lateral view of the cradle vehicle of Fig. 4.
Fig. 6 is the structural system figure of guardrail board template of the present invention.
Fig. 7 is the inner side structure of steel die schematic diagram in the present invention.
Fig. 8 is the outer steel formwork structural representation in the present invention.
Fig. 9 is the guardrail board model sheetinstallat precedence diagram in the present invention.
Figure 10 is the punching block joint treatment schematic diagram in the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The structural shape of the rib of column formula guardrail board of continuous concave structure of the present invention is shown in Fig. 1, Fig. 2 and Fig. 3, its construction method, can be undertaken by following step: preparation before construction, surveying and locating, reinforcement fabrication installation, stencil design processing, model sheetinstallat correction, concreting, form removable respectively; Now decomposition step is described below in detail:
(1) preparation of construction
Track traffic is owing to considering communication, electric power and sound insulation noise abatement requirement, and guardrail board, case beam etc. are all different from overhead road of city, and the existence of track embedded bar adds the difficulty of guardrail board construction.Therefore need to carry out necessary improvement to construction machinery, to adapt to needs of constructing.
(1) construction plant arranges: need pre-buried track reinforcing bar to equalize before construction, bend up after terminating again.
(2) fork truck transformation: change fork truck tire into solid tire by pneumatic tire, fork will be shoveled above simultaneously and be transformed into suspension hook, for steel form handling and dismounting.Fork truck principal arm hoisting depth should be determined according to guardrail board design height h, is generally 2h+ (0.8 ~ 1.2) m.
(3) manufacture Hanging Basket and cradle vehicle
As shown in Figure 4 and Figure 5, with the Hanging Basket of a Φ 32 reinforcement welding 0.6m × 2.0m × 1.1m, the fixing and demolition of external mold bolt when constructing for guardrail board.The cradle vehicle of a 2.3m × 2.0m × 2.5m is welded with No. 10 channel-section steels.Cradle vehicle chooses brachium 2.6m, top mast height 1.4m, and configures the wheel of diameter 0.5m in corner, facilitates cradle vehicle to move on bridge floor.Cradle vehicle rear portion arranges a ballast box, chooses arm, Hanging Basket and working load to balance.
(2) surveying and locating
On bridge floor, draw breast board and stud with the line of ink marker, and carry out levelling by cement mortar to projection, be convenient to template and lay and uniform force.
(1) guardrail board absolute altitude controls
Before building breast board concrete, the main muscle of breast board reinforcing bar arranges the spacing mark of absolute altitude, concreting is flat with mark.Spacing mark adopts the obvious adhesive tape of color to be rolled on breast board embedded bar, every 3 meters of sections, each section 4 points.
(2) horizontal alignment controls
Guardrail board plane survey provides left and right line curve element according to design, calculates the plane coordinates wanting setting-out.Surveying and locating template sideline.For straightway, every 10 meters of points; For curved section, linearly smooth and easy for ensureing, every 3 ~ 5 meters of points.
(3) reinforcement fabrication is installed
(1) reinforcement fabrication
The oil stain on its surface, paint dirt and the pound with a hammer outer skin, iron rust etc. that can peel off should be removed before steel bar meter.
About the regulation of steel bar meter during bending of reinforcing bar should meet with the crotch of end " railway concrete and masonry project construction quality accident standard " (TB10424-2003). bending reinforcing bar should from middle part, progressively bend towards two ends, crotch should once curve.
(2) reinforcement installation
Reinforcement installation divides two parts to carry out, and pre-buried guardrail board column reinforcing bar when Part I is cast-in-situ box girder, Part II is distribution reinforcement and capping beam reinforcing bar.Erection sequence is upper back, first bottom, and first inside outer rear flank, the main muscle of first colligation colligation stirrup again, muscle colligation horizontal bar is again indulged in first colligation.The colligation on bridge floor of reinforcing bar within breast board reinforcing bar binding bridge floor is installed, and the reinforcing bar outside bridge floor is installed on the platform hanging basket made in advance.
Points for attention: because guardrail board column reinforcing bar adopts pre-buried form, and guardrail board template is sizing punching block, therefore should ensure the pre-buried precision of this part reinforcing bar, when preventing subsequent construction, template cannot be installed.
(4) stencil design processing
(1) stencil design should follow structure reliably, and rolled steel dosage is few, the principle of easy accessibility.
1. go out to act on maximum lateral pressure on punching block and effective head height according to the young concrete maximum lateral pressure formulae discovery acted in template in " concrete structure engineering construction quality accident specification " (GB50204-2002).
Lateral pressure when 2. toppling over concrete according to " loading code for design of building structures " (GB50009-2001) is selected, punching block produced.
3. according to the geometry designs size of guardrail board, preliminary selected punching block stiffening rib and panel specification, plate thickness is not less than 5mm, and stiffening rib is selected and is not less than 5 bugle steel.
4. punching block force analysis is carried out after carrying out Load Combination according to above-mentioned specification.With stiffening rib for beam calculates according to well word floor slab structure maximal bending moment, shearing and the deflection value that stiffening rib and panel bear respectively, the panel allowable transformation of punching block is 1.5mm, and the allowable transformation of steel rib is 2mm.
5. carry out rigidity, the strength checking of stiffening rib and panel respectively according to the maximal bending moment, shearing and the deflection value that calculate, if do not meet, adjustable stirrup spacing or again selected panel and stiffening rib specification, until meet construction and code requirement.
6. connect for convenience of template transport and Template Location, above template, weld several suspension ring, bolt positioning holes etc.
Points for attention:
1, the split bolt of inside and outside template connection location should avoid column position, prevents Screw arbor with nut at both-ends from encountering column embedded bar, affects model sheetinstallat and fix.
2, for preventing template bolt hole place stress deformation, should ribs be set up at template back surface or increase template thickness.
3, fall for convenience of internal mold and remove, adopting during internal mold design than guardrail board design height 3cm, and draw ring is set at internal mold further groove place.
(2) template processing adopts batch production to make to ensure template precision, intensity and stability.
Fig. 6 is the structural system figure of guardrail board template of the present invention; In figure: 1 fastener, 2 wire rope (band turnbuckle), 3 channel-section steel 10#, 4 steel pipe Φ 48,5 adjusting trays, 6 Screw arbor with nut at both-ends Φ 16,7 embedded bars, 8 expansion bolts.
(5) model sheetinstallat corrects
(1) template form
Fig. 7 is inner side punching block, and Fig. 8 is outer steel formwork; External mold adopts sizing punching block, and internal mold adopts truss punching block, and panel 5mm steel plate, stiffening rib adopts No. 5 (b × d × r:50mm × 6mm × 5.5mm) angle steel and steel band.
Template wants polishing before use, uses thin steel brush during polishing, can not be irritable during operation, in order to avoid damage panel.After template polishing, brushing demoulding paint, template surface wiped clean by the towel brushing rear use clean, and require that template surface has the floodlight because polishing, hand feels can not have oil stain.
(2) model sheetinstallat
Model sheetinstallat order is: first fix internal mold, then install No. 10 channel-section steels, relocate exterior sheathing, see the precedence diagram of Fig. 9 guardrail board model sheetinstallat.
Guardrail board is template used is all carried by fork truck.Own wt is passed to case beam by the timber wedge block of beneath placement by internal mold, utilizes the embedded bar implanting bridge floor to fix internal mold by " one the one is drawn " stress system between steel pipe and wire rope turnbuckle.Beat expansion bolt, put channel-section steel before first adjust internal mold absolute altitude and verticality.With fork truck, external mold is put to channel-section steel, and by external mold by turnbuckle fork truck gone to below channel-section steel, tighten connecting bolt between Screw arbor with nut at both-ends bolt and steel form, make external mold stationary positioned.
Concrete spillage when building to prevent guardrail board, pastes with foam double-sided tape, and template is connected with bolt between steel form.See the punching block joint treatment schematic diagram in Figure 10, in figure: 9 sizing punching block, 10 foam double-sided tape, 11 bolt M8.
(3) template corrects
External mold first should carry out the correction of internal mold before installing.By adjusting wooden adjustment of wedge internal mold absolute altitude; By adjustment steel pipe adjustable tray and turnbuckle length adjustment internal mold verticality, and check with plumb line.
External mold absolute altitude adjusts mainly through the turnbuckle below channel-section steel, simultaneously by the verticality of adjustment Screw arbor with nut at both-ends length adjustment external mold.
(6) concreting
According to the characteristic of foam filling agent " start for about 10 minutes to bubble, 1 hours completes sclerosis ", concreting can should be built after internal mold lower feet foam filling agent is bubbled 1 hour.
Before concreting, reply template, cage of reinforcement, built-in fitting etc. carry out checking and the foreign material in template and the greasy dirt on reinforcing bar etc. are removed clean; When template has gap and hole, should block, must not spillage.
The order that concreting is built from case beam one end to the other end is carried out.One should be continuous across the breast board concreting operation of case beam, and must not interrupt, concrete color must be consistent.Note vibration compacting when building, must not occur that leakage was shaken phenomenon of shaking, especially will note the concrete vibration compacting in breast board thin plate position.Concrete vibrating arranges 1 ~ 2 poker vibrator.During vibrated concrete, vibrator collision slab, reinforcing bar and built-in fitting etc. be avoided, also directly must not apply vibration by reinforcing bar, the distance of 5cm will be kept with side form.Vibrating layouts wants evenly rationally, to be strictly on guard against that leakage is shaken accident.Template corner and the inaccessiable place of vibrator, can be aided with drill rod and plug and pound, to ensure that concrete surface is closely knit.
In order to ensure smooth, smooth, the zero defect of concrete surface, at the construction field (site) should emphatically to mix proportion, the slump, molding temperature, build speed and control.In casting process, carry out slump test to often filling with concrete, the concrete slump of pumping gets 12 ± 2cm, and the concrete slump of non-pumping suitably can be reduced to 10 ± 2cm.Molding temperature and build speed should be consistent with numerical value selected during stencil design.Concrete molding temperature is no more than 28 DEG C and is not less than 5 DEG C.Concrete speed of building rationally is determined according to the aspect such as physical dimension, concrete initial setting time, controls within 2m/h.
Should wipe one's face in time after concreting completes, and carry out press polish, after concrete initial set, timely covering and heat insulating material of good performance carries out maintenance.When daily mean temperature is lower than 5 DEG C, should take to heat by concreting in cold-weather maintenance way regulation, Insulation, to accelerate hardening of concrete process, improve early age strength of concrete.When daily mean temperature is higher than 32 DEG C, the moisture-keeping maintaining measures such as straw bag should be taked, to avoid concrete cracking by concrete construction in summar maintenance way regulation.
(7) form removable
After concrete strength reaches design strength more than 50% and completes and build 16 hours, form removable can be carried out.
Form removable order is removed afterwards by first installing, and the order that rear installation is first removed is carried out, and namely first removes external mold, then tears internal mold open.First utilize cradle vehicle to loosen fastening bolt, unload Screw arbor with nut at both-ends; Be transferred to stressed for outer side mold on fork truck by channel-section steel again, and by fork truck, outer side mold hung to bridge floor, side form in finally removing.Internal mold first should use rubber hammer tapping template sidepiece and the back side before removing, and itself and guardrail board are departed from, and then pulls out template with fork truck by hook.
The foreign material such as the broken concrete in template first should be removed before stripping.Answer the tiny components such as pay most careful attention to bolt, nut, broken concrete during form removable, prevent it from dropping and injure pedestrian and public vehicles.
Breast board concrete thickness is thinner, less with intersection angles such as columns, should strengthen especially concrete protection during form removable, the barbarous construction behavior such as forbid that hard draw is tolled breakdown.
To sum up, technological principle of the present invention can be summarized as:
1, external mold and guardrail board deadweight pass to channel-section steel by the turnbuckle of top, then it is stressed to be passed to case beam main body by channel-section steel;
2, utilize the splicing that pin and bolt carry out between template and template, realize connecting and location by Screw arbor with nut at both-ends between inside and outside template; Constructor carries out outside template and lower square bolt fixing and remove operation in Hanging Basket;
3, for convenience of the whereabouts of internal mold and dismounting, internal mold design adds and highlyer than guardrail board design reduces 3cm man-hour, internal mold by wooden adjustment of wedge height to design height.Internal mold lower feet 3cm scope adopts foam filling agent to fill, and prevents concrete spillage.
Finally, it should be noted that, the specific embodiment described in this manual, title that its flow process, technology contents are named etc. can be different.All equivalences of doing according to structure, feature and the principle described in inventional idea of the present invention or simple change, be included in the protection domain of patent of the present invention.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (3)
1. a rib of column formula guardrail board construction method for continuous concave structure, is characterized in that, comprise the following steps:
(1) prepare before construction, comprise fork truck transformation and manufacture Hanging Basket and cradle vehicle;
(2) surveying and locating, comprises guardrail board absolute altitude and controls and horizontal alignment control;
(3) reinforcement fabrication is installed, and point two parts carry out, pre-buried guardrail board column reinforcing bar when Part I is cast-in-situ box girder, and Part II is distribution reinforcement and capping beam reinforcing bar;
(4) stencil design processing and installation correct, and comprise external mold and internal mold; Erection sequence is: first fix internal mold, then installs No. 10 channel-section steels, relocates external mold;
(5) concreting;
(6) form removable;
Fork truck transformation in described step (1): be change fork truck tire into solid tire by pneumatic tire, fork will be shoveled above simultaneously and be transformed into suspension hook, for steel form handling and dismounting; For fork truck principal arm hoisting depth, 2 times that should be decided to be the design height of guardrail board increase by 0.8 ~ 1.2m again;
Described manufacture Hanging Basket: be the Hanging Basket with a Φ 32 reinforcement welding 0.6m × 2.0m × 1.1m, the fixing and demolition of external mold bolt when constructing for guardrail board;
Described manufacture cradle vehicle: be the cradle vehicle of welding a 2.3m × 2.0m × 2.5m with No. 10 channel-section steels; Cradle vehicle chooses brachium 2.6m, top mast height 1.4m, and configures the wheel of diameter 0.5m in corner, facilitates cradle vehicle to move on bridge floor; Cradle vehicle rear portion arranges a ballast box, chooses arm, Hanging Basket and working load to balance;
Guardrail board absolute altitude in described step (2) controls: be before building guardrail board concrete, the main muscle of guardrail board reinforcing bar arranges the spacing mark of absolute altitude, and concreting is flat with mark; Spacing mark adopts the obvious adhesive tape of color to be rolled on guardrail board embedded bar, every 3 meters of sections, each section 4 points;
Described horizontal alignment controls: guardrail board plane survey provides left and right line curve element according to design, calculates the plane coordinates wanting setting-out, surveying and locating template sideline; For straightway, every 10 meters of points; For curved section, linear smooth and easy for ensureing, every 3 ~ 5 meters of points;
Distribution reinforcement in described step (3) and the erection sequence of capping beam reinforcing bar are: upper back, first bottom, first inside outer rear flank, and the main muscle of first colligation colligation stirrup again, muscle colligation horizontal bar is again indulged in first colligation;
Template external mold in described step (4) adopts sizing punching block, and internal mold adopts truss punching block, panel 5mm steel plate, and stiffening rib adopts 5 bugle steel and steel bands; Paste with foam double-sided tape between steel form, and with bolt, template is connected;
Concreting in described step (5) can should be carried out after internal mold lower feet foam filling agent is bubbled 1 hour; Build the order of building from case beam one end to the other end to carry out; One should be continuous across the guardrail board concreting operation of case beam, and must not interrupt, concrete color must be consistent;
Form removable in described step (6) be concrete strength reach design strength more than 50% and complete build 16 hours after carry out; Dismounting order is by first installing rear dismounting, and the order that rear installation is first removed is carried out, and namely first removes external mold, then tears internal mold open.
2. the rib of column formula guardrail board construction method of continuous concave structure according to claim 1, it is characterized in that, in the installation of described template: own wt is passed to case beam by the timber wedge block of beneath placement by internal mold, the embedded bar that recycling implants bridge floor fixes internal mold by " one the one is drawn " stress system between steel pipe and wire rope turnbuckle; External mold is by turnbuckle fork truck gone to below channel-section steel, by tightening the bolt between Screw arbor with nut at both-ends bolt and steel form, makes external mold stationary positioned;
Being corrected to of described template: external mold first carries out the correction of internal mold before installing, by adjusting wooden adjustment of wedge internal mold absolute altitude; By adjustment steel pipe adjustable tray and turnbuckle length adjustment internal mold verticality, and check with plumb line; External mold absolute altitude adjusts mainly through the turnbuckle below channel-section steel, simultaneously by the verticality of adjustment Screw arbor with nut at both-ends length adjustment external mold.
3. the rib of column formula guardrail board construction method of continuous concave structure according to claim 1, it is characterized in that, described form removable first utilizes cradle vehicle release bolt, unloads Screw arbor with nut at both-ends; Be transferred to stressed for external mold on fork truck by channel-section steel again, and by fork truck, external mold hung to bridge floor, finally remove internal mold.
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| CN201794028U (en) * | 2010-09-16 | 2011-04-13 | 中铁十九局集团第二工程有限公司 | Crash barrier template |
| CN102877418A (en) * | 2012-10-26 | 2013-01-16 | 济南城建集团有限公司 | Stentless urban bridge anti-collision guardrail construction method and cradle vehicle and gun carrier thereof |
| CN203200654U (en) * | 2013-03-18 | 2013-09-18 | 江苏省交通规划设计院股份有限公司 | Bridge medial strip combined type guard bar capable of being afforested |
| CN103334379A (en) * | 2013-06-27 | 2013-10-02 | 中铁四局集团第三建设有限公司 | Construction method for hanging part of anti-collision guardrail on expressway |
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| CN103669223A (en) | 2014-03-26 |
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