CN102493350A - Construction method of landscape bridge outside-hanging crash barrier - Google Patents
Construction method of landscape bridge outside-hanging crash barrier Download PDFInfo
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- CN102493350A CN102493350A CN2011104295037A CN201110429503A CN102493350A CN 102493350 A CN102493350 A CN 102493350A CN 2011104295037 A CN2011104295037 A CN 2011104295037A CN 201110429503 A CN201110429503 A CN 201110429503A CN 102493350 A CN102493350 A CN 102493350A
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Abstract
The invention relates to a construction method of a landscape bridge outside-hanging crash barrier. The method is characterized by comprising two steps, namely in-situ casting and prefabrication, the cast-in-situ and prefabricated crash barriers are overlapped, wherein the outside of the crash barrier adopts prefabricated artistic European style line plates, then the prefabricated artistic European style line plates are used as an external die for the cast-in-situ crash barrier, and the inner plates of the crash barrier are cast-in-situ. The construction method provided by the invention has the advantages of low construction difficulty, low construction cost, reduced outside hanging operation, good safety performance, short construction period and high construction efficiency and the like.
Description
Technical field
The present invention relates to the field of Collison fence for bridge, particularly relate to a kind of manufacturing approach of external hanging type anticollision barrier.
Background technology
Traditional Collison fence for bridge is main with cast in situ ferroconcrete wall formula guardrail; Its role is to the minimizing accident extent of damage; The designer only considers its security performance, owing to the ignoring of landscape function, cause existing guardrail form stereotyped; Lack aesthetic feeling, can't satisfy people the increasingly high demand of view.
In view of the foregoing, be necessary view bridge external hanging type anticollision barrier is carried out art up designing and producing, the security performance of bridge and landscape effect are taken into account.
Summary of the invention
Technical problem to be solved by this invention is: a kind of job practices of view bridge external hanging type anticollision barrier is provided, and this method is different from the construction of traditional cast-in-place anticollision barrier, not only be easy to construction, and efficiency of construction is higher.
The present invention solves its technical problem and adopts following technical scheme:
The job practices of view bridge external hanging type anticollision barrier provided by the invention; Specifically: be divided into cast-in-place and prefabricated two parts; Carry out cast-in-place and prefabricated guardrail superimposed; Wherein the anticollision barrier lateral surface adopts prefabricated art up European line plate, uses the external mold of this prefabricated European line plate as cast-in-place anticollision barrier then, reproduces the inner panel that waters anticollision barrier.
The present invention can adopt the method that may further comprise the steps:
(1) preparation of anticollision barrier pre-erection:
1) be the preset outstanding protruding wedge of steel bar concrete in prefabricated anti-collision protection fence plate and bridge floor connection at the anticollision barrier pre-erection, so that prefabricated anti-collision protection fence plate and bridge floor are installed;
2) utilize prefabricated anti-collision protection fence plate to make external mold; , then prefabricated anti-collision protection fence plate and bridge floor are fixed with the reinforcing bar welding, and tamped the slit between protruding wedge of leveling steel bar concrete and the bridge floor junction prefabricated anti-collision protection fence plate leveling with chock, form the leveling cement sand bed with cement mortar;
3) bottom of anti-collision protection fence plate is left the adjustment seam is installed, so that contact better with bridge floor;
(2) preparation of the cast-in-place part of anticollision barrier:
1) in the assembling reinforcement of the behind of anticollision barrier pre-erection;
2) prop up the inner formword and the bracing frame of the cast-in-place part of anticollision barrier;
3) at assembling reinforcement place concreting;
4) form removal;
Through above-mentioned steps, accomplish the construction of said view bridge external hanging type anticollision barrier.
When concreting, can be by construction in layer, all concrete should comprehensively vibrate once cast immediately, make it to form closely knit, even integral body, and note avoiding taking place to leak and shake, cross the phenomenon of shaking, and guarantee evenly closely knitly, and appearance is bright and clean.
Said construction in layer can adopt the method for layer and section, specifically: concrete building, Ying Congyi holds beginning; One section one section to the other end, is dipping bed and pushes forward comprehensively, and the length of each section is 2-4m; Every layer of thickness≤30cm that builds, at Schattenseite or chamfer site, lift height should reduce.
The present invention can adopt the method for the fluid concrete of three layers of branches; Specifically: first floor is built the main channel guardrail bottom hypotenuse inferior horn height of the cast-in-place part of anticollision barrier; The second layer is poured into angle height on the said hypotenuse; The 3rd layer of top that is poured into said hypotenuse, and go into mould time and side amount by what the personnel of vibrating controlled three layer concretes.
The present invention can be vibrated according to following method, and specifically: it is the inboard adverse slope inner corner trim that vibrates earlier that the bottom of the cast-in-place part of anticollision barrier vibrates, bubble row laterally; Outside vibrating then; The stalk back of the body overflows bubble along the outside, and then gets back to the inboard, carries out the secondary vibration exhaust; During the stern layer of the cast-in-place part of anticollision barrier of vibrating, vibrating spear should leave template 5-10cm; During the top layer of the cast-in-place part of anticollision barrier of vibrating, the rod that shakes mainly vibrates in cage of reinforcement, by the exhaust of shaking again of inboard, outer rear flank earlier, should note not wanting rod and not bump reinforcing bar; In the process of vibrating of each layer, the insertion position of vibrating spear should be far away slightly from the template piece, splits with vibrationproof that sealant tape causes spillage on the piece.
The effect that the present invention can be vibrated according to the inspection of following method: if concrete has not had significantly and sunk, do not emit bubble, be smooth bleeding, it is suitable then to vibrate.
Said vibrating spear can adopt ZN35 type poker vibrator.
The present invention compared with prior art has following main beneficial effect:
1. European lines of anticollision barrier external belt, by traditional on-the-spot cast-in-place employing prefabrication that changes into, the effect of moulding guarantees easily, and difficulty of construction significantly reduces.
2. above-mentioned prefabricated anti-collision protection fence plate is the double as external mold simultaneously, and the pure cast-in-place anticollision barrier construction of tradition has reduced external scaffolding and external mold, and construction cost is low, has reduced outer hanging operation, and security performance is good, and the duration is short, and efficiency of construction is high.
Description of drawings
Fig. 1 is the structural representation of the view bridge external hanging type anticollision barrier for preparing of the present invention.
Among the figure: 1. bridge floor; 2. the cast-in-place part of anticollision barrier; 3. anticollision barrier pre-erection; 4. bridge deck pavement; 5. leveling cement sand bed; 6. the adjustment seam is installed.
The specific embodiment
The job practices of view bridge external hanging type anticollision barrier provided by the invention; This method is: be divided into cast-in-place and prefabricated two parts; Carry out cast-in-place and prefabricated guardrail superimposed; Wherein the anticollision barrier lateral surface adopts prefabricated art up European line plate, uses the external mold of this prefabricated European line plate as cast-in-place anticollision barrier then, reproduces the inner panel that waters anticollision barrier.
The view bridge external hanging type anticollision barrier of the present invention's preparation; Its structure is shown in 1; Comprise cast-in-place part 2 of anticollision barrier and anticollision barrier pre-erection 3; They are formed by stacking and are said anticollision barrier, and wherein: the cast-in-place part 2 of anticollision barrier is positioned at the behind of anticollision barrier pre-erection 3 and is connected as a single entity with it.
The cast-in-place part 2 of said anticollision barrier, the one of which side links to each other with the interior side-to-side anastomosis of anticollision barrier pre-erection 3.The opposite side of the cast-in-place part of this anticollision barrier is an arc curve, and the chamfer radius of this curve upper and lower end is R25; The arc place of the centre of this curve, top curve inwardly angle be 84 the degree, the bandy arc radius in middle part is R25.5, the bottom curve inwardly angle be 55 the degree.
The profile of said anticollision barrier pre-erection 3 is European lines.It is circular-arc to adopt typified form to form Rome when these European lines are meant prefabrication.
The above-mentioned view bridge external hanging type anticollision barrier of the present invention's preparation is installed on the bridge floor and uses.
The method that said anticollision barrier is installed on the bridge floor is: the anticollision barrier pre-erection is installed earlier and is utilized it as external mold; The reinforcing bar of the cast-in-place part of colligation anticollision barrier and inboard lamina membranacea is installed on bridge floor carries out the concreting of the cast-in-place part of anticollision barrier more subsequently, then both is overlapped into integral body, forms anticollision barrier.Precast plate part had both guaranteed the perfect unity of the European lines of exterior trim, again as the exterior sheathing of cast-in-place part.
Said bridge floor is meant the bridge box and beam end face.
The present invention adopts following method to prepare view bridge external hanging type anticollision barrier, and its step comprises:
1. the preparation of anticollision barrier pre-erection 3 (claiming anti-collision protection fence plate again):
1) this prefabricated anti-collision protection fence plate external form is European lines; With the preset outstanding protruding wedge of steel bar concrete in bridge floor 1 connection, so that prefabricated anti-collision protection fence plate and bridge floor are installed;
2) utilize above-mentioned prefabricated anti-collision protection fence plate to make external mold; With chock with above-mentioned prefabricated anti-collision protection fence plate leveling; Then that above-mentioned prefabricated anti-collision protection fence plate and bridge floor is fixing with the reinforcing bar welding; And tamp the slit between protruding wedge of leveling steel bar concrete and bridge floor 1 junction with cement mortar, form leveling cement sand bed 5 shown in Figure 1;
3) bottom of anti-collision protection fence plate is left adjustment seam 6 is installed, so that contact better with bridge floor 1.
2. the preparation of the cast-in-place part 2 of anticollision barrier:
1) in the assembling reinforcement of the behind of anticollision barrier pre-erection 3;
2) prop up the inner formword and the bracing frame of the cast-in-place part of anticollision barrier;
3) at assembling reinforcement place concreting;
4) form removal;
Through above-mentioned steps, accomplish the preparation of view bridge external hanging type anticollision barrier.
When concreting, should carry out concrete construction according to following points for attention:
1. basic demand:
Accurately calculating mix proportion according to the requirement of strength that designs tries to join; Send professional testing crew to agitator supervision and check concrete mix implementation status; Raw material, slump, style sampling, weighing weighing apparatus inspection calibration and stir strictness such as fashionable and undertaken by regulation; Pay special attention to check cement type, preferentially use ordinary Portland cement (for example Po42.5R cement).Because reinforcing bar is closeer, built-in fitting is more, vibrating spear is selected ZN35 type poker vibrator, and coarse aggregate is selected 5～20mm graded broken stone for use, and fine aggregate is selected mild-crude river sand for use.Consider the pre-erection impression, reach the construction operability,, adopt retarding agent to remedy the construction short slab of concrete under hot conditions through adopting the outside bubble after high efficiency water reducing agent reduces concrete formation.
2 concretings:
During pouring concrete construction, strict and press construction in layer, all concrete should comprehensively vibrate once cast immediately, make it to form closely knit, even integral body, and note avoiding taking place to leak shaking, cross the phenomenon of shaking.Concrete cast with vibrate closely relatedly, complement each other.The construction technology of anticollision barrier is stressed cast and is vibrated no less important, should accurately hold the opportunity of watering and shaking, and vibrating time length, pass should be decided according to the concrete condition of cast; Can not early shake, can not shake late, not owe to shake; Also do not cross and shake, evenly closely knit to guarantee, appearance is bright and clean.
1) layer and section:
Concrete building, Ying Congyi holds beginning, and one section one section to the other end, is dipping bed and pushes forward comprehensively, and the length 2-4m of each section is advisable, and every layer of thickness of building should not surpass 30cm, and at Schattenseite or chamfer site, lift height should suitably reduce.
2) water and smash step:
Concrete building will be extended to the other end by an end by lift height continuously, is sure not random accumulation, and upper strata and lower floor should be the appearance of watering of inclination level, and the linking cooperation of noting cast and vibrating can not early be shaken.The concrete that so-called " early shaking " is exactly this layer cast does not put in place as yet or is not covered with scope, lacks unity and coherence and vibrates too early, and early shaking to cause cement paste to be overflow to lower or limit; Mix loses uniformity, again during pouring concrete, and then more cement paste come-up; Near the side form face; Form aberration, should note in addition crossing shaking, to prevent the generation of cloud squamous color spot.
Adopt the pouring procedure of dividing three layers during concreting.First floor is built main channel guardrail bottom hypotenuse inferior horn height, and the second layer is poured into angle height on the hypotenuse, and the 3rd layer is poured into the top, goes into mould time and side amount by what the personnel of vibrating controlled three layer concretes.
3) vibrating method:
The bottom inboard adverse slope inner corner trim that vibrates earlier that vibrates, bubble row laterally, the outside of vibrating then, the stalk back of the body overflows bubble along the outside, and then gets back to the inboard, carries out the secondary vibration exhaust, can vibrating spear be touched reinforced frame, by jolt ramming.When vibrating stern layer, vibrating spear should leave template 5-10cm, if the too close template of vibrating spear can stay uneven mortar and cement paste layer at concrete surface.Top layer vibrates, and the rod that shakes mainly vibrates in cage of reinforcement, by the exhaust of shaking again of first inboard, outer rear flank, should notice that rod does not bump reinforcing bar, and is stable because the stern layer concrete has become, if rod touches reinforcing bar, is prone to make inhomogeneous spot of appearance or Qinshui on the bottom inclined-plane reinforcement cover.In the process of vibrating of each layer, the insertion position of vibrating spear should be far away slightly from the template piece, splits with vibrationproof that sealant tape causes spillage on the piece.If concrete has not had significantly and has sunk, do not emit bubble, be smooth bleeding, it is suitable then to vibrate; For bottom or inner corner trim position, should insert soon and carry slowly, insert fast, twitch up and down 3-4 time stable to help concrete to sink; The each lifting pressed 2-3cm control, whenever carries the 2-3s that once pauses, and is beneficial to get rid of bubble.Be also noted that when mix is rarer, answer corresponding shortening vibrating time, reduce and twitch number of times.The moving interval of vibrating spear is generally pressed 1.5 times of controls of vibrating spear operating radius, about general 25cm, can prevent that just leak-stopping shakes.
3. concrete smearing repaiied and maintenance:
1) wipe one's face in the wall top, and concreting must be removed unnecessary mortar behind end face, and elder generation roughly receives flat slightly the contraction to concrete and begins to solidify preceding compacting, floating, receipts light.
2) metope is modified.After the form removal, should fit up surface blemishes immediately, for less bubble pit, can adopt the dry ash of white cement and ordinary Portland cement allotment to modify, the ratio of lime and general ordinary Portland cement generally is controlled at 1
:(can allocate test in advance, so that ashes color and the concrete surface solid colour of allotment) about 3, should not mix and make the mortar brushing, do like this that to be prone to make concrete to lose former glossy, modification should divide to be carried out for 2-3 time.For the bigger voids and pits of area, available white cement and ordinary Portland cement are smeared by proper proportion configuration cement paste; After waiting to do, the available dry ash for preparing is decorated again, and the spillage corner angle of seam crossing can polish flat with sanding machine gently; Decorate with dry ash again; Sand line aberration, rejected regions such as cloud squamous spot can be used the sand paper hacking earlier, decorate with mortar and dry ash again.
Claims (7)
1. the job practices of a view bridge external hanging type anticollision barrier is pressed its cast-in-place and prefabricated two-part characteristic, adopts the job practices of following steps:
(1) preparation of anticollision barrier pre-erection:
1) be the preset outstanding protruding wedge of steel bar concrete in prefabricated anti-collision protection fence plate and bridge floor connection at the anticollision barrier pre-erection, so that prefabricated anti-collision protection fence plate and bridge floor are installed;
2) utilize prefabricated anti-collision protection fence plate to make external mold; , then prefabricated anti-collision protection fence plate and bridge floor are fixed with the reinforcing bar welding, and tamped the slit between protruding wedge of leveling steel bar concrete and the bridge floor junction prefabricated anti-collision protection fence plate leveling with chock, form the leveling cement sand bed with cement mortar;
3) bottom of anti-collision protection fence plate is left the adjustment seam is installed, so that contact better with bridge floor;
(2) preparation of the cast-in-place part of anticollision barrier:
1) in the assembling reinforcement of the behind of anticollision barrier pre-erection;
2) prop up the inner formword and the bracing frame of the cast-in-place part of anticollision barrier;
3) at assembling reinforcement place concreting;
4) form removal;
Through above-mentioned steps, accomplish the construction of said view bridge external hanging type anticollision barrier.
2. the job practices of view bridge external hanging type anticollision barrier according to claim 1 is characterized in that when concreting, should be by construction in layer; All concrete are once cast; Should comprehensively vibrate immediately, make it to form closely knit, even integral body, and note avoiding taking place to leak shaking, cross the phenomenon of shaking; Guarantee evenly closely knitly, appearance is bright and clean.
3. the job practices of view bridge external hanging type anticollision barrier according to claim 2 is characterized in that said construction in layer is the method that adopts layer and section, specifically: concrete building; Ying Congyi holds beginning, and one section one section to the other end, is dipping bed and pushes forward comprehensively; The length of each section is 2-4m; Every layer of thickness≤30cm that builds, at Schattenseite or chamfer site, lift height should reduce.
4. the job practices of view bridge external hanging type anticollision barrier according to claim 3; It is characterized in that adopting the method for the fluid concrete of three layers of branches; Specifically: first floor is built the main channel guardrail bottom hypotenuse inferior horn height of the cast-in-place part of anticollision barrier; The second layer is poured into angle height on the said hypotenuse, the 3rd layer of top that is poured into said hypotenuse, and go into mould time and side amount by what the personnel of vibrating controlled three layer concretes.
5. the job practices of view bridge external hanging type anticollision barrier according to claim 4; It is characterized in that vibrating according to following method, specifically: it is the inboard adverse slope inner corner trim that vibrates earlier that the bottom of the cast-in-place part of anticollision barrier vibrates, bubble row laterally; Outside vibrating then; The stalk back of the body overflows bubble along the outside, and then gets back to the inboard, carries out the secondary vibration exhaust; During the stern layer of the cast-in-place part of anticollision barrier of vibrating, vibrating spear should leave template 5-10cm; During the top layer of the cast-in-place part of anticollision barrier of vibrating, the rod that shakes mainly vibrates in cage of reinforcement, by the exhaust of shaking again of inboard, outer rear flank earlier, should note not wanting rod and not bump reinforcing bar; In the process of vibrating of each layer, the insertion position of vibrating spear should be far away slightly from the template piece, splits with vibrationproof that sealant tape causes spillage on the piece.
6. the job practices of view bridge external hanging type anticollision barrier according to claim 5, it is characterized in that the effect of vibrating according to following method inspection: if concrete has not had significantly and sunk, do not emit bubble, be smooth bleeding, it is suitable then to vibrate.
7. the job practices of view bridge external hanging type anticollision barrier according to claim 6 is characterized in that said vibrating spear adopts ZN35 type poker vibrator.
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| CN109403209A (en) * | 2018-11-22 | 2019-03-01 | 上海市政交通设计研究院有限公司 | A kind of pedestrian guardrail that band drips and its construction method |
| CN109972518A (en) * | 2019-03-06 | 2019-07-05 | 安徽省公路桥梁工程有限公司 | The construction method of plate-hanging type guardrail base |
| CN109972518B (en) * | 2019-03-06 | 2020-07-10 | 安徽省公路桥梁工程有限公司 | Construction method of hanging plate type guardrail base |
| CN110255208A (en) * | 2019-06-27 | 2019-09-20 | 中国能源建设集团安徽省电力设计院有限公司 | Across the transfer station and construction method of original coal transporting trestle |
| CN111794074A (en) * | 2020-07-07 | 2020-10-20 | 浙江华东工程咨询有限公司 | Arch bridge concrete beam and beam forming method thereof |
| CN111794074B (en) * | 2020-07-07 | 2022-03-22 | 浙江华东工程咨询有限公司 | Arch bridge concrete beam and beam forming method thereof |
| CN111844352A (en) * | 2020-08-24 | 2020-10-30 | 中交二公局第三工程有限公司 | Construction process for prefabricating mechanical high-efficiency guardrail |
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Application publication date: 20120613 |