CN110295543A - A kind of science of bridge building prefabricated assembled anticollision barrier and its construction method - Google Patents
A kind of science of bridge building prefabricated assembled anticollision barrier and its construction method Download PDFInfo
- Publication number
- CN110295543A CN110295543A CN201910587621.7A CN201910587621A CN110295543A CN 110295543 A CN110295543 A CN 110295543A CN 201910587621 A CN201910587621 A CN 201910587621A CN 110295543 A CN110295543 A CN 110295543A
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- Prior art keywords
- guardrail
- science
- anticollision barrier
- bridge
- prefabricated assembled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000004888 barrier function Effects 0.000 title claims abstract description 31
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000002787 reinforcement Effects 0.000 claims abstract description 35
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000012790 adhesive layer Substances 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 239000011178 precast concrete Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000009416 shuttering Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
Abstract
The invention belongs to science of bridge building technologies, and in particular to the prefabricated assembled anticollision barrier of a kind of science of bridge building based on prestress wire connection is preset with the duct worn for prestress wire including the guardrail being prefabricated into the guardrail.Radial pressure caused by prestressed stretch-draw to produce powerful vertical pressure between concrete guardrail and bridge floor, and horizontal component caused by the frictional resistance collaboration prestressed stretch-draw which provides can be effective against the outside Transverse Impact power of Vehicular impact generation.Prefabricated construction eliminates the processes such as live assembling reinforcement, shuttering, cast-in-place concrete, maintenance, also mitigates environmental protection pressure.
Description
Technical field
The invention belongs to science of bridge building technologies, and in particular to a kind of science of bridge building based on prestress wire connection is in advance
The construction method of assembled anticollision barrier processed and the anticollision barrier.
Background technique
Bridge concrete anticollision barrier is current most widely used guardrail form, for support vehicles traveling safety extremely
It closes important.However current concrete anti-collision guard bar, especially outside concrete guardrail use cast-in-situ steel reinforced concrete substantially, are applying
Need to complete the processes such as assembling reinforcement, shuttering, concreting, concrete curing, form removal during work, required time compared with
Long, work efficiency is lower.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of prefabricated assembled anticollision barrier of science of bridge building and the anticollisions
The construction construction method of guardrail saves duration, easy for construction, mitigation environmental protection pressure.The technical solution adopted by the invention is as follows:
A kind of prefabricated assembled anticollision barrier of science of bridge building is preset in the guardrail including the guardrail being prefabricated into for pre-
The duct that prestress steel strand is worn.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the arched curve in duct, in the lower end at guardrail both ends
Face is respectively kept with port.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, through there is bellows to be formed in the duct, the wave
Port is stretched out at the both ends of line pipe respectively, and the prestress wire may pass through bellows.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building further includes two anchorages, and the anchorage is used for respectively will be pre-
The both ends of prestress steel strand are fixed in the cantilever of bridge.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the anchorage is fixed on cantilever by anchoring tooth block, described
Anchoring tooth block side is type, the section at its both ends is triangular in shape.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, also embedded in the cantilever there are two spiral reinforcements, described
Spiral reinforcement is respectively used to be arranged the both ends of bellows, the connected anchorage in the lower end of the spiral reinforcement.
The end face of the prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the cantilever and guardrail cooperation is equipped with several anti-
Shear-steel muscle, the height that the shear reinforcement exposes are 100 ~ 120mm, between longitudinally adjacent two shear reinforcements of bridge between
Away from for 180 ~ 260mm.
A kind of construction method of the prefabricated assembled anticollision barrier of science of bridge building as described above, comprising the following steps:
S1) precast concrete guardrail；
S2) the cantilever installation guard rail position of bridge carries out installation spiral reinforcement and shear reinforcement construction；
S3) production anchoring tooth block；
S4) the brushing adhesive layer on the contact surface of guardrail and cantilever；
S5 guardrail) is lifted into installation site, after adhesive layer knot is hard, prestress wire is worn in bellows, tensioning is pre-
Prestress steel strand and its both ends is fastened on cantilever with anchorage；
S6) the mud jacking into bellows completes installation after to be solidified.
Above-mentioned construction method, the stretch-draw prestressing force size of the prestress wire is 1339.2MPa ~ 1395MPa, bent
Line radius is 3000mm.
Above-mentioned construction method, the adhesive layer be epoxy resin mortar layer and its with a thickness of 4.5 ~ 6.5mm, it is strong with concrete binding
Degree is greater than 4MPa；Polypropylene fibre or steel fibre are added in the guardrail and the volume is 0.6 ~ 1.8kg/m3。
The invention has the benefit that
(1) radial pressure caused by prestressed stretch-draw to produce powerful vertical pressure between concrete guardrail and bridge floor
Power, the frictional resistance which provides cooperate with horizontal component caused by prestressed stretch-draw that can be effective against Vehicular impact production
Raw outside Transverse Impact power.Prefabricated construction eliminates the works such as live assembling reinforcement, shuttering, cast-in-place concrete, maintenance
Sequence also mitigates environmental protection pressure.
(2) shearing resistance that the cohesive force and shearing resistance bar dowel that epoxy resin mortar adhesive layer provides provide can effectively enhance guardrail
Resist the ability of lateral impact.Since the epoxy resin mortar adhesive layer knot hard time is very short, prestressed stretch-draw finishes shield on the outside of bridge
Column can be put into, and the duration can be obviously shortened, and bridge can be open to traffic in advance, can bring apparent economic benefit and society's effect
Benefit.
(3) application of polypropylene fibre or steel fiber reinforced concrete is so that the wearability and crack resistance of concrete are improved,
Concrete guardrail is hardly damaged in vehicle collision.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is cross-sectional view of the invention.
In figure: 1 being guardrail, 2 be prestress wire, 3 be anchorage, 4 be spiral reinforcement, 5 be shear reinforcement, 6 be bonding
Layer, 7 be anchor tooth block, 8 be bellows, 9 be cantilever, 10 be bridge floor.
Specific embodiment
The present invention is further explained with reference to the accompanying drawing.
The prefabricated assembled anticollision barrier of a kind of science of bridge building, including the guardrail 1 being prefabricated into, it is characterised in that: the shield
The duct worn for prestress wire 3 is preset in column 1.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the arched curve in duct, in the lower end at 1 both ends of guardrail
Face is respectively kept with port.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, through having bellows 8 to be formed in the duct, the wave
Port is stretched out at the both ends of line pipe 8 respectively, and the prestress wire 3 may pass through bellows 8.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, further includes two anchorages 3, and the anchorage 3 is used to respectively to
The both ends of prestress wire 3 are fixed in the cantilever 9 of bridge.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the anchorage 3 are fixed on cantilever 9 by anchoring tooth block 7, institute
It is triangular in shape for type, the section at its both ends to state anchoring 7 side of tooth block.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, also embedded in the cantilever 9 there are two spiral reinforcement 4, institutes
Spiral reinforcement 4 is stated to be respectively used to be arranged the both ends of bellows 8, the connected anchorage 3 in the lower end of the spiral reinforcement 4.
The prefabricated assembled anticollision barrier of above-mentioned science of bridge building, the cantilever 9 are equipped with several with the end face that guardrail 1 cooperates
Shear reinforcement 5, the height that the shear reinforcement 5 exposes are 100 ~ 120mm, longitudinally adjacent two shear reinforcements 5 of bridge it
Between spacing be 180 ~ 260mm.
Construction method one
A kind of construction method of the prefabricated assembled anticollision barrier of science of bridge building as described above, comprising the following steps:
S1) precast concrete guardrail 1, addition polypropylene fibre or steel fibre and the volume are 0.6 ~ 1.0kg/m when production3；?
Bellows 8 is made in guardrail 1 and remains for the hole for cooperating shear reinforcement 5 in advance；
S2) cantilever 9 of bridge, which is installed, carries out installation spiral reinforcement 4 and the construction of shear reinforcement 5 at guardrail 1, what shear reinforcement 5 exposed
Height is 100mm, and the spacing between longitudinally adjacent two shear reinforcements 5 of bridge is 200mm.
S3) production anchoring tooth block 7；
S4) the brushing adhesive layer 6 on the contact surface of guardrail 1 and cantilever 4；The adhesive layer 6 be epoxy resin mortar layer and its with a thickness of
5mm, it is greater than 4MPa with Concrete Bond Strength；
S5 guardrail 1) is lifted into installation site, after 6 knot of adhesive layer is hard, prestress wire 8 is worn in bellows 8, in advance
8 stretch-draw prestressing force of prestress steel strand to 1339.2 MPa, sweep 3000mm, specification is 5 Φs15.2* long 5800mm
And its both ends anchorage 3 is fastened on cantilever 9；
S6) the mud jacking into bellows 8 completes installation after to be solidified.
Construction method two
The main distinction of this construction method and above-mentioned construction method one is to have adjusted prestressing force size, the specific steps are as follows:
S1) precast concrete guardrail 1, addition polypropylene fibre or steel fibre and the volume are 1.6 ~ 1.8kg/m when production3；?
Bellows 8 is made in guardrail 1 and remains for the hole for cooperating shear reinforcement 5 in advance；
S2) cantilever 9 of bridge, which is installed, carries out installation spiral reinforcement 4 and the construction of shear reinforcement 5 at guardrail 1, what shear reinforcement 5 exposed
Height is 200mm, and the spacing between longitudinally adjacent two shear reinforcements 5 of bridge is 260mm.
S3) production anchoring tooth block 7；
S4) the brushing adhesive layer 6 on the contact surface of guardrail 1 and cantilever 4；The adhesive layer 6 be epoxy resin mortar layer and its with a thickness of
6.5mm, it is greater than 4MPa with Concrete Bond Strength；
S5 guardrail 1) is lifted into installation site, after 6 knot of adhesive layer is hard, prestress wire 8 is worn in bellows 8, in advance
8 stretch-draw prestressing force of prestress steel strand to 1395MPa, sweep 3000mm, specification is 5 Φs15.2* long 5800mm, and
Its both ends anchorage 3 is fastened on cantilever 9；
S6) the mud jacking into bellows 8 completes installation after to be solidified.
Comparative example
The guardrail with above-mentioned specification of the same race is made with the mode of existing live formwork, welding, installation connection reinforcing bar.
Above-mentioned construction method one and two and comparative example are respectively equipped with two groups of finished products, carry out vertical direction maximal impact
Test, the result is as follows:
| Project | Construction method one | Construction method two | Comparative example |
| Maximal impact (kN/m) | 274 | 285 | 284 |
| Site operation duration (h/m) | 0.10 | 0.10 | 1.0 |
| Site operation personnel amount (person-time) | 8 | 8 | 20 |
It can be seen that this construction method of the application, can save great amount of cost from time and manpower, guardrail 1 is prefabricated
Formula can assembled in situ, the equipment for simplifying construction site.Prestress wire 8 increases pressure to improve 1 transverse direction of guardrail
Frictional force realizes high-intensitive connection, traffic safety is effectively ensured.
Claims (10)
1. the prefabricated assembled anticollision barrier of a kind of science of bridge building, including the guardrail (1) being prefabricated into, it is characterised in that: the shield
The duct worn for prestress wire (3) is preset in column (1).
2. the prefabricated assembled anticollision barrier of science of bridge building according to claim 1, it is characterised in that: the duct is in bow
Shape curve is respectively kept with port in the lower end surface at guardrail (1) both ends.
3. the prefabricated assembled anticollision barrier of science of bridge building according to claim 2, it is characterised in that: passed through in the duct
Bellows (8) is installed with to be formed, port is stretched out at the both ends of the bellows (8) respectively, and the prestress wire (3) may pass through
Bellows (8).
4. the prefabricated assembled anticollision barrier of science of bridge building according to claim 3, it is characterised in that: further include two anchors
Have (3), the both ends of prestress wire (3) for being fixed in the cantilever (9) of bridge by the anchorage (3) respectively.
5. the prefabricated assembled anticollision barrier of science of bridge building according to claim 4, it is characterised in that: the anchorage (3)
It is fixed on cantilever (9) by anchoring tooth block (7), anchoring tooth block (7) side is type, the section at its both ends is triangular in shape.
6. the prefabricated assembled anticollision barrier of science of bridge building according to claim 5, it is characterised in that: the cantilever (9)
Inside also embedded there are two spiral reinforcement (4), the spiral reinforcement (4) is respectively used to be arranged the both ends of bellows (8), the spiral
The lower end of reinforcing bar (4) is connected anchorage (3).
7. the prefabricated assembled anticollision barrier of science of bridge building according to claim 6, it is characterised in that: the cantilever (9)
Several shear reinforcements (5) are equipped with the end face of guardrail (1) cooperation, the height that the shear reinforcement (5) is exposed is 100 ~
120mm, the spacing between longitudinally adjacent two shear reinforcements (5) of bridge are 180 ~ 260mm.
8. a kind of construction method of the prefabricated assembled anticollision barrier of science of bridge building as claimed in claim 7, it is characterised in that: packet
Include following steps,
S1) precast concrete guardrail (1)；
S2 installation spiral reinforcement (4) and shear reinforcement (5) construction) are carried out at cantilever (9) installation guardrail (1) of bridge；
S3) production anchoring tooth block (7)；
S4) the brushing adhesive layer (6) on the contact surface of guardrail (1) and cantilever (4)；
S5 guardrail (1)) is lifted into installation site, after adhesive layer (6) knot is hard, wears prestress steel twist in bellows (8)
Line (8), stretch-draw prestressing force steel strand wires (8) and its both ends are fastened on cantilever (9) with anchorage (3)；
S6) to bellows (8) interior mud jacking, installation is completed after to be solidified.
9. construction method according to claim 8, it is characterised in that: the stretch-draw prestressing force of the prestress wire (8)
Size is 1339.2MPa ~ 1395MPa, sweep 3000mm.
10. construction method according to claim 9, it is characterised in that: the adhesive layer (6) is epoxy resin mortar layer and its thickness
Degree is 4.5 ~ 6.5mm, is greater than 4MPa with Concrete Bond Strength；In the guardrail (1) addition polypropylene fibre or steel fibre and
The volume is 0.6 ~ 1.8kg/m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587621.7A CN110295543A (en) | 2019-07-02 | 2019-07-02 | A kind of science of bridge building prefabricated assembled anticollision barrier and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587621.7A CN110295543A (en) | 2019-07-02 | 2019-07-02 | A kind of science of bridge building prefabricated assembled anticollision barrier and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110295543A true CN110295543A (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910587621.7A Pending CN110295543A (en) | 2019-07-02 | 2019-07-02 | A kind of science of bridge building prefabricated assembled anticollision barrier and its construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644032A (en) * | 2009-08-31 | 2010-02-10 | 中交通力建设股份有限公司 | Beam-removing rib-increasing strengthening construction technology of highway bridge |
| CN201962850U (en) * | 2011-01-04 | 2011-09-07 | 山西省第三建筑工程公司 | Space unbonded prestressed ring beam |
| WO2018214518A1 (en) * | 2017-05-23 | 2018-11-29 | 山东大学 | Intelligent, flexible protection device for steel arch in case of tunnel rockfall collapse |
| CN109208467A (en) * | 2017-06-30 | 2019-01-15 | 广东工业大学 | A kind of precast assembly crash barrier structure |
| CN109338950A (en) * | 2018-11-12 | 2019-02-15 | 西安汉河环保科技有限公司 | A kind of anticollision barrier construction method for highway |
| CN210262715U (en) * | 2019-07-02 | 2020-04-07 | 烟台大学 | Bridge engineering is with prefabricated assembled anticollision barrier |
-
2019
- 2019-07-02 CN CN201910587621.7A patent/CN110295543A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644032A (en) * | 2009-08-31 | 2010-02-10 | 中交通力建设股份有限公司 | Beam-removing rib-increasing strengthening construction technology of highway bridge |
| CN201962850U (en) * | 2011-01-04 | 2011-09-07 | 山西省第三建筑工程公司 | Space unbonded prestressed ring beam |
| WO2018214518A1 (en) * | 2017-05-23 | 2018-11-29 | 山东大学 | Intelligent, flexible protection device for steel arch in case of tunnel rockfall collapse |
| CN109208467A (en) * | 2017-06-30 | 2019-01-15 | 广东工业大学 | A kind of precast assembly crash barrier structure |
| CN109338950A (en) * | 2018-11-12 | 2019-02-15 | 西安汉河环保科技有限公司 | A kind of anticollision barrier construction method for highway |
| CN210262715U (en) * | 2019-07-02 | 2020-04-07 | 烟台大学 | Bridge engineering is with prefabricated assembled anticollision barrier |
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