CN110886235B - Bridge construction method - Google Patents
Bridge construction method Download PDFInfo
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- CN110886235B CN110886235B CN201911331487.0A CN201911331487A CN110886235B CN 110886235 B CN110886235 B CN 110886235B CN 201911331487 A CN201911331487 A CN 201911331487A CN 110886235 B CN110886235 B CN 110886235B
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 239000004567 concrete Substances 0.000 claims abstract description 95
- 230000002787 reinforcement Effects 0.000 claims abstract description 35
- 238000011835 investigation Methods 0.000 claims abstract description 10
- 238000009941 weaving Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 77
- 239000010959 steel Substances 0.000 claims description 77
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 11
- 239000011178 precast concrete Substances 0.000 claims description 9
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 description 10
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
The invention discloses a bridge construction method, relates to the technical field of bridge construction, and solves the problem that the bearing capacity of a bridge is reduced due to the fact that concrete is poured in front and back in the existing bridge construction, and the technical scheme is characterized by comprising the following steps: a. carrying out on-site investigation; b. pouring a precast slab; c. maintaining the precast slab; d. weaving a reinforcement cage; e. pouring the bridge pier; f. installing a tower crane; g. laying a precast slab; h. pouring concrete; i. dismantling the tower crane; j. laying concrete; k. lay the pitch layer, assemble all prefabricated plates together earlier through the tower crane, then once only carry out the pouring of concrete in the cavity in the middle of the prefabricated plate for the one-time casting of concrete is moulded, and the concrete in the middle of each prefabricated plate forms a whole completely, thereby has improved the holistic bearing capacity of bridge, and need not to wait for the concrete midway and reach certain intensity, has shortened the time of construction.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a bridge construction method.
Background
The bridge is generally erected on rivers, lakes and seas, is a structure through which vehicles, pedestrians and the like can smoothly pass, and is also extended to a building which is erected to cross mountain stream, unfavorable geology or meet other traffic requirements and enables the bridge to pass more conveniently in order to adapt to the modern high-speed developed traffic industry.
The existing fabricated bridge construction is generally divided into two types, one type is integrally fabricated construction, the other type is a hanging basket type construction method, the integrally fabricated construction needs large-scale transportation equipment for transportation, so that the construction operation is inconvenient, the hanging basket type construction generally adopts a construction mode that two ends of a bridge are constructed forwards simultaneously, and then the middle part is folded, in the process of propulsion, the poured concrete can reach certain strength after a certain period of time, the construction time is prolonged, and because the concrete poured firstly has certain strength, the concrete poured later and the concrete poured firstly can not completely form a whole, so that the integral bearing capacity of the bridge is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bridge construction method, all precast slabs are firstly assembled together through a tower crane, then concrete is poured into a cavity in the middle of the precast slabs at one time, so that the concrete is poured and molded at one time, the concrete in each precast slab completely forms a whole, the integral bearing capacity of the bridge is improved, the concrete does not need to wait for reaching a certain strength midway, and the construction time is shortened.
In order to achieve the purpose, the invention provides the following technical scheme: a bridge construction method comprises the following steps:
a. and (3) field investigation: carrying out measurement and investigation on a site for building the bridge, and determining the specific size of the bridge, thereby determining the positions of two piers and the prefabricated size of a prefabricated plate;
b. pouring a precast slab: the concrete precast slab is cast and molded, a cavity is reserved in the concrete precast slab and penetrates through the concrete precast slab along the length direction of the concrete precast slab, reinforcing steel bars are pre-embedded in a mold before the concrete precast slab is cast, and hoisting rings are pre-embedded at four corners of the top of the concrete precast slab;
c. and (3) maintaining the precast slab: curing the precast concrete slab, wherein a gunny bag sheet is covered on the surface of the precast concrete slab during curing, and the gunny bag sheet is kept moist for not less than 14 days;
d. weaving a reinforcement cage: the steel reinforcement cage is woven by using steel reinforcements, when the steel reinforcement cage is woven, the shape and the size of the woven steel reinforcement cage are ensured to be the same as those of the hollow cavity of the concrete precast slab, and the number of the woven steel reinforcement cage is equal to that of the precast concrete precast slab;
e. pouring a pier: pouring piers at the positions of two piers in site investigation;
f. installing a tower crane: installing tower cranes at the tops of the two piers; the tower arms of the two tower cranes extend towards the direction of mutual approach, and the ends of the two tower arms close to each other are fixedly connected together;
g. laying a precast slab: paving the prefabricated plates from the two piers to the direction close to each other, and when the prefabricated plates are paved, connecting steel stranded wires on four hoisting rings of the prefabricated plates, and fixedly connecting the other ends of the steel stranded wires to tower arms at the tops of the prefabricated plates; after a first precast slab is laid, putting a reinforcement cage in a cavity of the precast slab, welding the reinforcement cage with the next precast slab, and then laying the next precast slab, wherein the precast slab is sleeved on the reinforcement cage during laying; when the prefabricated slabs are folded at the middle position of the bridge, abdicating grooves are reserved on two sides of the tops of the two folded prefabricated slabs and are communicated with the cavity, when the prefabricated slabs are folded, two reinforcement cages are placed into the two prefabricated slabs firstly, then the two prefabricated slabs are laid, and then the two reinforcement cages pass through the abdicating grooves to be welded;
h. pouring concrete: after the laying is finished, pouring concrete into the cavity of the precast slab;
i. dismantling a tower crane: after concrete curing is finished, dismantling the steel strand and the tower crane;
j. concrete paving: installing a mould at the side edge of the precast slab, installing a mould at the end, deviating from each other, of the two precast slabs at the two ends, then pouring concrete at the top, and curing the concrete after pouring;
k. laying an asphalt layer: and after the concrete curing is finished, paving an asphalt layer on the surface of the concrete layer.
By adopting the technical scheme, when construction is carried out, the precast slabs are paved firstly, then concrete is poured together, so that the concrete can be completely formed into a whole, the integral bearing capacity of the bridge is improved, the concrete does not need to wait midway until reaching certain strength, and the construction time is shortened.
The invention is further configured to: in the step b, a plurality of steel bar embedding grooves are reserved at the top of the concrete precast slab and penetrate through the concrete precast slab along the length direction of the concrete precast slab, and in the step g, the steel bar embedding grooves of two adjacent precast slabs are in one-to-one correspondence and are aligned with each other; and between the step i and the step j, laying steel bars, and laying the steel bars in a steel bar embedding groove of the precast slab.
Through adopting above-mentioned technical scheme, bury the groove underground through setting up the reinforcing bar to carry out burying underground of reinforcing bar in the middle of burying underground the groove at the reinforcing bar between step i and step j, when making lay the concrete in step j, can be in the same place concrete and reinforcing bar connection, form reinforced concrete, increased the intensity of the concrete of laying.
The invention is further configured to: and between the step i and the step j, when the steel bars are laid, the same steel bar penetrates through the steel bar burying grooves communicated with all the prefabricated plates, and the steel bars penetrate through the bottom of the connecting plate.
Through adopting above-mentioned technical scheme, the same reinforcing bar runs through the reinforcing bar embedded groove that all prefabricated plates are linked together with the reinforcing bar, and the connection of reinforcing bar is not carried out through the welded mode to the intensity of reinforcing bar has been improved, thereby can improve the intensity of the concrete of laying.
The invention is further configured to: and g, mounting a connecting plate at the top of one side, close to each other, of each two adjacent prefabricated plates, and fixing the connecting plate on the prefabricated plates through bolts.
Through adopting above-mentioned technical scheme, through setting up the connecting plate, can fix in advance the prefabricated plate when laying.
The invention is further configured to: in the step e, a layer of mounting steel plate for mounting the tower crane is laid on the top of the bridge pier, a plurality of vertically arranged reinforcing steel bars pre-embedded into concrete are fixedly connected to the bottom of the mounting steel plate, and the depth of the reinforcing steel bars pre-embedded into the bridge pier is not less than one third of the height of the bridge pier; and in the step f, the tower crane is installed on an installation steel plate at the top of the pier.
Through adopting above-mentioned technical scheme, through setting up the mounting panel and with the pre-buried income pier of reinforcing bar of mounting panel bottom in the middle of, can increase the steadiness of tower crane.
The invention is further configured to: and in the step f, the tower crane is connected with the installation steel plate by adopting a high-strength bolt.
Through adopting above-mentioned technical scheme, through setting up high strength bolt, can increase the steadiness of being connected between tower crane and the installation steel sheet.
The invention is further configured to: and in the step f, a plurality of steel strands are fixed on one sides of the two tower cranes, which deviate from each other, and the other ends of the steel strands are fixedly connected to the ground.
Through adopting above-mentioned technical scheme, set up the steel strand wires through the one side that deviates from each other at two tower cranes, when laying the prefabricated plate, support the tower crane through the steel strand wires of one side that deviates from each other of two tower cranes, improve the steadiness of tower crane.
The invention is further configured to: and h, sealing the cavities of the two precast slabs at the two ends during pouring, pouring concrete from the reserved abdicating groove of the two precast slabs in the middle, and curing the concrete after pouring.
Through adopting above-mentioned technical scheme, pour to both sides from the centre, the concrete of being convenient for is even flows into each department of cavity for the concrete can form a complete whole, prevents to have the fault in the concrete.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, by adopting the precast slabs and the cavities, when construction is carried out, the precast slabs are laid firstly, and then concrete is poured together, so that the concrete can be completely integrated, the integral bearing capacity of the bridge is improved, the concrete does not need to be waited for to reach certain strength midway, and the construction time is shortened;
2. according to the invention, the steel bar embedding groove is arranged, and the steel bars are embedded in the steel bar embedding groove between the step i and the step j, so that when concrete is paved in the step j, the concrete and the steel bars can be connected together to form reinforced concrete, and the strength of the paved concrete is increased.
Drawings
FIG. 1 is an isometric view of a prefabricated panel of an embodiment;
FIG. 2 is a diagram illustrating an embodiment of a yielding slot.
In the figure: 1. prefabricating a slab; 2. hoisting a ring; 3. a steel bar burying groove; 4. a yielding groove.
Detailed Description
Example (b): a bridge construction method comprises the following steps:
a. and (3) field investigation: carrying out measurement and investigation on the site where the bridge is built, and determining the specific size of the bridge, thereby determining the positions of the two piers and the prefabricated size of the prefabricated slab 1;
b. pouring the precast slab 1: casting and molding the concrete precast slab 1; referring to the attached drawing 1, a concrete precast slab 1 is arranged in a cuboid shape, a cavity is reserved in the concrete precast slab 1, the cavity penetrates through the concrete precast slab 1 along the length direction of the concrete precast slab 1, reinforcing steel bars are pre-embedded in a mould before the concrete precast slab 1 is poured, hoisting rings 2 are pre-embedded at four corners of the top of the concrete precast slab 1, a plurality of reinforcing steel bar embedding grooves 3 are reserved at the top of the concrete precast slab 1, and the reinforcing steel bar embedding grooves 3 penetrate through the concrete precast slab 1 along the length direction of the concrete precast slab 1;
c. and (3) maintenance of the precast slab 1: curing the precast concrete slab 1, wherein a gunny bag sheet is covered on the surface of the precast concrete slab 1 during curing, the gunny bag sheet is kept moist, and the curing time is not less than 14 days;
d. weaving a reinforcement cage: the steel reinforcement cage is woven by using the steel reinforcement, when the steel reinforcement cage is woven, the shape and the size of the woven steel reinforcement cage are ensured to be the same as those of the hollow cavity of the concrete precast slab 1, and the quantity of the woven steel reinforcement cage is equal to that of the precast concrete precast slab 1;
e. pouring a pier: pouring piers at the positions of two piers in site investigation, laying a layer of mounting steel plate for mounting a tower crane at the top of the piers, fixedly connecting the bottom of the mounting steel plate with a plurality of vertically arranged reinforcing steel bars embedded into concrete, wherein the depth of the reinforcing steel bars embedded into the piers is not less than one third of the height of the piers;
f. installing a tower crane: the tower crane is installed at the tops of the two piers, the tower crane is installed on an installation steel plate at the top of the pier, the tower crane and the installation steel plate are connected by adopting high-strength bolts, a plurality of steel strands are fixed on the sides, which are away from each other, of the two tower cranes, and the other ends of the steel strands are fixedly connected to the ground; the tower arms of the two tower cranes extend towards the direction of mutual approach, and the ends of the two tower arms close to each other are fixedly connected together;
g. laying a precast slab 1: paving the prefabricated slab 1 from two piers to the direction close to each other, and when the prefabricated slab 1 is paved, connecting steel stranded wires on four hoisting rings 2 of the prefabricated slab 1, and fixedly connecting the other ends of the steel stranded wires to tower arms at the top of the prefabricated slab 1; after a first prefabricated plate 1 is laid, putting a reinforcement cage in a cavity of the prefabricated plate 1, welding the reinforcement cage with a next prefabricated plate 1 on the reinforcement cage, then laying the next prefabricated plate 1, and sleeving the prefabricated plate 1 on the reinforcement cage during laying; the steel bar embedding grooves 3 of two adjacent prefabricated plates 1 are in one-to-one correspondence and are aligned with each other, a connecting plate is arranged at the top of one side, close to each other, of each two adjacent prefabricated plates 1, and the connecting plate is fixed on the prefabricated plates 1 through bolts; referring to the attached drawing 2, when the prefabricated slabs 1 are folded at the middle position of a bridge, the two sides of the tops of the two folded prefabricated slabs 1 are provided with the abdicating grooves 4, the abdicating grooves 4 are communicated with the cavity, when the folding is carried out, the two steel reinforcement cages are firstly placed in the two prefabricated slabs 1, then the two prefabricated slabs 1 are laid, and then the two prefabricated slabs pass through the abdicating grooves 4 to be welded;
h. pouring concrete: after the laying is finished, pouring concrete into the cavities of the precast slabs 1, sealing the cavities of the two precast slabs 1 at the two ends during pouring, then pouring the concrete from the abdicating groove 4 reserved in the two precast slabs 1 in the middle, and curing the concrete after the pouring is finished;
i. dismantling a tower crane: after concrete curing is finished, dismantling the steel strand and the tower crane;
j. laying steel bars: then, laying steel bars in the steel bar burying grooves 3 of the prefabricated plates 1, wherein the same steel bar penetrates through the steel bar burying grooves 3 communicated with all the prefabricated plates 1, and the steel bar penetrates through the bottom of the connecting plate;
k. concrete paving: installing a mould at the side edge of the precast slab 1, installing a mould at the end, which is deviated from each other, of the two precast slabs 1 at the two ends, then pouring concrete at the top, and curing the concrete after pouring is finished;
laying an asphalt layer: and after the concrete curing is finished, paving an asphalt layer on the surface of the concrete layer.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A bridge construction method is characterized in that: the method comprises the following steps:
a. and (3) field investigation: carrying out measurement and investigation on the site where the bridge is built, and determining the specific size of the bridge, thereby determining the positions of two piers and the prefabricated size of the prefabricated slab (1);
b. pouring the precast slab (1): the concrete precast slab (1) is molded by casting, a cavity is reserved in the concrete precast slab (1), the cavity penetrates through the concrete precast slab (1) along the length direction of the concrete precast slab (1), reinforcing steel bars are pre-embedded in a mould before the concrete precast slab (1) is cast, and hoisting rings (2) are pre-embedded at four corners of the top of the concrete precast slab (1);
c. curing the precast slab (1): curing the precast concrete slab (1) which is precast and formed, wherein a gunny bag sheet is covered on the surface of the precast concrete slab (1) during curing, the gunny bag sheet is kept moist, and the curing time is not less than 14 days;
d. weaving a reinforcement cage: the steel reinforcement cage is woven by using steel reinforcements, when the steel reinforcement cage is woven, the shape and the size of the woven steel reinforcement cage are ensured to be the same as those of a hollow cavity of the concrete precast slab (1), and the number of the woven steel reinforcement cage is equal to that of the precast concrete precast slab (1);
e. pouring a pier: pouring piers at the positions of two piers in site investigation;
f. installing a tower crane: installing tower cranes at the tops of the two piers; the tower arms of the two tower cranes extend towards the direction of mutual approach, and the ends of the two tower arms close to each other are fixedly connected together;
g. paving a precast slab (1): paving the prefabricated plates (1) from two piers to the direction close to each other, and when the prefabricated plates (1) are paved, connecting steel stranded wires on four hoisting rings (2) of the prefabricated plates (1) and fixedly connecting the other ends of the steel stranded wires to tower arms at the tops of the prefabricated plates (1); after a first prefabricated slab (1) is laid, putting a reinforcement cage in a cavity of the prefabricated slab (1), welding the reinforcement cage with the next prefabricated slab (1) on the reinforcement cage, then laying the next prefabricated slab (1), and sleeving the prefabricated slab (1) on the reinforcement cage during laying; a connecting plate is arranged at the top of one side, close to each other, of each two adjacent prefabricated plates (1), and the connecting plate is fixed on the prefabricated plates (1) through bolts; when the precast slabs (1) are folded at the middle position of a bridge, the two sides of the tops of the two folded precast slabs (1) are provided with the abdicating grooves (4), the abdicating grooves (4) are communicated with the cavity, when the folding is carried out, the two reinforcement cages are placed into the two precast slabs (1), then the two precast slabs (1) are laid, and then the two reinforcement cages pass through the abdicating grooves (4) to be welded;
h. pouring concrete: after the laying is finished, pouring concrete into the cavity of the precast slab (1);
i. dismantling a tower crane: after concrete curing is finished, dismantling the steel strand and the tower crane;
j. concrete paving: installing a mould at the side edge of the precast slab (1), installing a mould at the end, which is deviated from the precast slab (1), of the two ends, pouring concrete at the top, and curing the concrete after pouring;
k. laying an asphalt layer: and after the concrete curing is finished, paving an asphalt layer on the surface of the concrete layer.
2. The bridge construction method according to claim 1, characterized in that: in the step b, a plurality of steel bar embedding grooves (3) are reserved at the top of the concrete precast slab (1), the steel bar embedding grooves (3) penetrate through the concrete precast slab (1) along the length direction of the concrete precast slab (1), and in the step g, the steel bar embedding grooves (3) of two adjacent precast slabs (1) are in one-to-one correspondence and are aligned with each other; and between the step i and the step j, steel bars are laid, and the steel bars are laid in the steel bar burying grooves (3) of the precast slabs (1).
3. The bridge construction method according to claim 1, characterized in that: and between the step i and the step j, when the steel bars are laid, the same steel bar penetrates through the steel bar burying grooves (3) communicated with all the prefabricated plates (1), and the steel bars penetrate through the bottom of the connecting plate.
4. The bridge construction method according to claim 1, characterized in that: in the step e, a layer of mounting steel plate for mounting the tower crane is laid on the top of the bridge pier, a plurality of vertically arranged reinforcing steel bars pre-embedded into concrete are fixedly connected to the bottom of the mounting steel plate, and the depth of the reinforcing steel bars pre-embedded into the bridge pier is not less than one third of the height of the bridge pier; and in the step f, the tower crane is installed on an installation steel plate at the top of the pier.
5. The bridge construction method according to claim 4, wherein: and in the step f, the tower crane is connected with the installation steel plate by adopting a high-strength bolt.
6. The bridge construction method according to claim 1, characterized in that: and in the step f, a plurality of steel strands are fixed on one sides of the two tower cranes, which deviate from each other, and the other ends of the steel strands are fixedly connected to the ground.
7. The bridge construction method according to claim 1, characterized in that: in the step h, the cavities of the two precast slabs (1) at the two ends are sealed during pouring, then concrete is poured from the reserved abdicating groove (4) of the two precast slabs (1) in the middle, and the concrete is cured after pouring is finished. .
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| CN111676824B (en) * | 2020-06-19 | 2021-10-01 | 中建富林集团有限公司 | Bridge construction method |
| CN112921812B (en) * | 2021-01-25 | 2022-09-06 | 太仓市路桥工程有限公司 | Bridge construction method |
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Address after: Shandong Rensheng Construction Group Co., Ltd., No. 99, Wenchang Road, Laiyang, Yantai, Shandong 265200 Patentee after: Shandong Rensheng Construction Group Co.,Ltd. Address before: 265200 Tiangezhuang village, Longwangzhuang sub district office, Laiyang City, Yantai City, Shandong Province 0001 Patentee before: Yantai Rensheng Engineering Equipment Co.,Ltd. |
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Denomination of invention: Bridge construction methods Effective date of registration: 20231215 Granted publication date: 20210706 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: Shandong Rensheng Construction Group Co.,Ltd. Registration number: Y2023980071871 |