CN104594199A - Construction method for reinforced concrete bridge framing longitudinal joint longitudinal connection - Google Patents
Construction method for reinforced concrete bridge framing longitudinal joint longitudinal connection Download PDFInfo
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- CN104594199A CN104594199A CN201410721642.0A CN201410721642A CN104594199A CN 104594199 A CN104594199 A CN 104594199A CN 201410721642 A CN201410721642 A CN 201410721642A CN 104594199 A CN104594199 A CN 104594199A
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- angle steel
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Provided is a construction method for reinforced concrete bridge framing longitudinal joint longitudinal connection. The method comprises the steps of pre-construction preparatory work, unequal angle steel coating, hole drilling and flushing, colloid injecting and steel bar embedding, unequal angle steel hole drilling and installation, temporary consolidation, joint filling by a TST seamless expansion joint bonding material and the like. According to the construction method for the reinforced concrete bridge framing longitudinal joint longitudinal connection, unequal angle steel and the TST seamless expansion joint bonding material are adopted in bridge connection construction, the construction method is simple, the material and equipment investment is little, a bridge completed after construction is durable in use, the construction cost is reduced, and a lot of post-construction maintenance funds are saved compared with an original construction method. Moreover, the materials adopted in the construction are environmentally friendly with the advantages of energy conservation and environment protection.
Description
Technical field
The present invention relates to bridge construction construction technique field, specifically the longitudinal connection construction method of Reinforced Concrete Bridge framing longitudinal joint.
Background technology
The Urban Bridge of China is in the peak period of construction and maintenance, the longitudinal longitudinal joint connection construction of framing of the longitudinal longitudinal joint connection construction of longitudinal longitudinal joint connection construction of bridge widening improvement project, new and old bridge, old bridge framing, newly building bridge engineering, all relate to the longitudinal connection construction of bridge longitudinal joint, have " being rigidly connected ", have " hinged ", these methods of attachment through the differential settlement effect of long temperature load, traffic load and bridge, the bridge floor of junction easily occur crack even deck paving come off.This connected mode adopts " elasticity connection ", solve other connected mode under external force to many diseases that bridge brings, ensure that bridge normal usage function and and extend the maintenance period of bridge, saving construction costs and accelerating construction progress are had great significance.
Summary of the invention
Object of the present invention, is to provide a kind of speed of application fast, saves material, the longitudinal connection construction method of Reinforced Concrete Bridge framing longitudinal joint of saving resource.
The technical scheme adopted is:
A kind of longitudinal connection construction method of Reinforced Concrete Bridge framing longitudinal joint, the theory at this method compages thing settlement joint and shrinkage joint, bridge widening engineering and the connectivity problem of newly-built framing bridge engineering are defined as " elasticity is connected " that use elastic colloidal material, the TST expansion joints without seals bonding material being applied to bridge expanssion joint is applied to bridge to connect, bonding by with the long limb of unequal angle, absorbs the distortion of two width bridges.Play waterproof, damping, effect attractive in appearance, thus avoid the disease that two width bridges bring to bridge junction due to temperature load, vehicle impact load, works differential settlement, it is characterized in that comprising the steps:
1, unequal angle application
Angle steel application need be coated with a priming paint, and priming paint adopts common rustproof paint, uses Angle polishing machine polishing rust cleaning, concentrates in together spray-applied primer after rust cleaning, adopt the small-sized spray gun of small-sized air compressor to spray under gentle breeze weather condition by weight before japanning.
2, boring, hole flushing
First unwrapping wire before boring, adopt the impact drilling by line position, bit diameter about 5mm larger than the diameter of bolt, diameter 12mm bolt selected by bolt, and drill bit selects the alloy tool steel bit of φ 18mm.Hole depth 120mm, drill bit keeps vertical with beam face all the time.Obtain hairbrush with happiness is sharp, put elongated bar, extend at the bottom of hole, repeatedly twitch back and forth, dust, disintegrating slag are taken out of, then uses compressed air, floating dust in blowout hole.Alcohol or acetone scouring hole inwall is stained with absorbent cotton again after having blown.
3, injecting glue, bar planting
Get one group of powerful anchoring adhesive, be arranged on special manual syringe, then thread mixing mouth stretched at the bottom of hole, slowly pull trigger, bar planting immediately after injecting glue reaches 80% in hole.
Bolt implant part wire brush to be brushed repeatedly before bar planting, remove rust dirty, then clean with alcohol or acetone.After having noted glue in boring, the bolt crossed through processing of rust removing is put into aperture immediately, then slowly unidirectional screw-in, can not reverse reversion halfway, until bolt stretches at the bottom of hole.Just next procedure construction can be carried out after powerful anchoring adhesive solidifies 50h at normal temperatures.
4, unequal angle boring, installation
Angle steel drill adopts bench drill and Electric portable drill, and drill bit adopts 18mm drill bit, uses angle steel manomelia to sample on bolt, draw bolt position, then hole before boring.Namely monolithic angle steel installs angle steel after completing boring, manually direct angle steel is placed on bolt, as bolt hole indivedual in installation process and bolt misplace, gas cutting reaming can be adopted, screwing screw is got final product after installation, check the verticality of the long limb of angle steel, unclamp screw as out of plumb and add wedge adjustment, note angle steel long limb verticality when another side angle steel is installed and stitch wide as not being inconsistent and can suitably adjusting.
5, temporary consolidation
After concrete bridge deck pavement, Ф 20 reinforcing bar is used to be welded in the long limb upper limb of angle steel every one meter of point, the horizontal thrust produced when timber wedge is inserted to resist and to pave pitch in middle part.
6, TST expansion joints without seals bonding material
Pave after pitch, remove temporary consolidation construction bottom Ф 10 round steel, Ф 10 round steel is welded on angle steel flex point place, side; Second layer construction first fills in pledget, reinstalls elastic colloid filler, adopts TST expansion joints without seals binding material.Specifically comprise following processing step:
(1) gap is cleared up: within the scope of the long limb of cleaning angle steel, pledget is with the foreign material of upper part.
(2) clean 0.5mm rubble: select in construction area appropriate location, use clear water to concentrate cleaning rubble.
(3) hot melt: use self-control TST fuse machine fusing TST expansion joints without seals bonding material;
(4) mix: mix appropriate 0.5mm rubble in fuse machine, uses the compound of mixing plant or artificial mix rubble and TST, stirs;
(5) TST compound is manually poured into apart from road surface 1cm;
(6) perfusion is without the TST bonding material sealing of rubble.
Advantage of the present invention:
The present invention installs unequal angle then TST expansion joints without seals bonding material joint filling construction method construction bridges by planting bolt on girder connects, and efficiently solves other and connects many diseases of bringing to bridge of way.Compared with conventional construction method, increase substantially the longitudinal connection construction quality of Reinforced Concrete Bridge framing longitudinal joint, greatly improved the safe operating life of bridge.Shorten the construction period, save construction cost.
Accompanying drawing illustrates:
Accompanying drawing 1 is bridge elasticity connecting structure structural representation.
Accompanying drawing 2 is construction technology process structural representations.
Detailed description of the invention
A kind of longitudinal connection construction method of Reinforced Concrete Bridge framing longitudinal joint, specifically comprises the following steps:
1, unequal angle application
Angle steel application need be coated with a priming paint, and priming paint adopts common rustproof paint, uses Angle polishing machine polishing rust cleaning, concentrates in together spray-applied primer after rust cleaning, adopt the small-sized spray gun of small-sized air compressor to spray under gentle breeze weather condition by weight before japanning.
2, boring, hole flushing
First unwrapping wire before boring, adopt the impact drilling by line position, bit diameter about 5-6mm larger than the diameter of bolt, diameter 12mm bolt selected by bolt, and drill bit selects the alloy tool steel bit of φ 18mm.Hole depth 110-130mm, drill bit keeps vertical with beam face all the time.Hole flushing is a most important link in bar planting, because the complete rear inside of hole drill has a lot of ashes, lime-ash, directly affects the quality of bar planting, so foreign material in hole must be cleaned out.Method is: obtain hairbrush with happiness is sharp, put elongated bar, extend at the bottom of hole, repeatedly twitch back and forth, dust, disintegrating slag are taken out of, then uses compressed air, floating dust in blowout hole.Alcohol or acetone scouring hole inwall is stained with absorbent cotton again after having blown.
3, injecting glue, bar planting
Get one group of powerful anchoring adhesive, be arranged on special manual syringe, then stretch at the bottom of hole by thread mixing mouth, slowly pull trigger, full in order to make reinforcing bar implant glue in metapore, glue can not be made again to outflow, and in hole, injecting glue reaches 80%.Should bar planting immediately after filling glue in hole.
Bolt implant part wire brush to be brushed repeatedly before bar planting, remove rust dirty, then clean with alcohol or acetone.After having noted glue in boring, the bolt crossed through processing of rust removing is put into aperture immediately, then slowly unidirectional screw-in, can not reverse reversion halfway, until bolt stretches at the bottom of hole.Powerful anchoring adhesive just can complete solidification at normal temperatures, just can carry out next procedure construction after 50-55h.
4, unequal angle boring, installation
Angle steel drill adopts bench drill and Electric portable drill, and drill bit adopts 18mm drill bit, uses angle steel manomelia to sample on bolt, draw bolt position, then hole before boring.Angle steel can be installed after monolithic angle steel completes boring, manually direct angle steel is placed on bolt, as bolt hole indivedual in installation process and bolt misplace, gas cutting reaming can be adopted, screwing screw is got final product after installation, note the verticality checking the long limb of angle steel, unclamp screw as out of plumb and add wedge adjustment, when another side angle steel is installed, notice that angle steel long limb verticality and seam are wide as not being inconsistent and can suitably adjusting.
5, temporary consolidation
After concrete bridge deck pavement, Ф 20 reinforcing bar is used to be welded in the long limb upper limb of angle steel every one meter of point, the horizontal thrust produced when timber wedge is inserted to resist and to pave pitch in middle part.
6, TST expansion joints without seals bonding material
Pave after pitch, remove temporary consolidation construction bottom Ф 10 round steel, Ф 10 round steel is welded on angle steel flex point place, side, in order to filler in support pledget and seam; Second layer construction pledget, using self-made tool to fill in, is finally elastic colloid filler, adopts TST expansion joints without seals bonding material, high-performance, waterproof and dampproof.Specifically comprise the steps:
(1) clear up gap: within the scope of the long limb of cleaning angle steel, pledget is with the foreign material of upper part, and majority is the secondary pollution of construction, guarantees that TST is bonding with angle steel firmly;
(2) clean 0.5mm rubble: select in construction area appropriate location, use clear water to concentrate cleaning rubble, sewage flows directly into river, mustn't pollute road surface, protection of the environment;
(3) hot melt: use self-control TST fuse machine fusing TST expansion joints without seals bonding material;
(4) mix: mix appropriate 0.5mm rubble in fuse machine, this engineering uses TST bonding material to be used for longitudinal slot, do not bear vertical load, mixing rubble is in order to the mobility reduced costs and reduce TST bonding material is easy to construction, use the compound of mixing plant or artificial mix rubble and TST, stir;
(5) the artificial self-control cementation of fissures instrument that uses pours into TST compound apart from road surface 1cm;
(6) perfusion is without the TST bonding material sealing of rubble.
Claims (1)
1. the longitudinal connection construction method of Reinforced Concrete Bridge framing longitudinal joint, the theory at this method compages thing settlement joint and shrinkage joint, bridge widening engineering and the connectivity problem of newly-built framing bridge engineering are defined as " elasticity is connected " that use elastic colloidal material, the TST expansion joints without seals bonding material being applied to bridge expanssion joint is applied to bridge to connect, bonding by with the long limb of unequal angle, absorbs the distortion of two width bridges; Play waterproof, damping, effect attractive in appearance, thus avoid the disease that two width bridges bring to bridge junction due to temperature load, vehicle impact load, works differential settlement, it is characterized in that comprising the steps:
1) unequal angle application
Angle steel application need be coated with a priming paint, and priming paint adopts common rustproof paint, uses Angle polishing machine polishing rust cleaning, concentrates in together spray-applied primer after rust cleaning, adopt the small-sized spray gun of small-sized air compressor to spray under gentle breeze weather condition by weight before japanning;
2) boring, hole flushing
First unwrapping wire before boring, adopt the impact drilling by line position, bit diameter 5mm larger than the diameter of bolt, diameter 12mm bolt selected by bolt, and drill bit selects the alloy tool steel bit of φ 18mm; Hole depth 120mm, drill bit keeps vertical with beam face all the time; Obtain hairbrush with happiness is sharp, put elongated bar, extend at the bottom of hole, repeatedly twitch back and forth, dust, disintegrating slag are taken out of, then uses compressed air, floating dust in blowout hole, after having blown, be stained with alcohol or acetone scouring hole inwall with absorbent cotton again;
3) injecting glue, bar planting
Get one group of powerful anchoring adhesive, be arranged on special manual syringe, then thread mixing mouth stretched at the bottom of hole, slowly pull trigger, bar planting immediately after injecting glue reaches 80% in hole;
Bolt implant part wire brush to be brushed repeatedly before bar planting, remove rust dirty, then clean with alcohol or acetone; After having noted glue in boring, the bolt crossed through processing of rust removing is put into aperture immediately, then slowly unidirectional screw-in, can not reverse reversion halfway, until bolt stretches at the bottom of hole, powerful anchoring adhesive just can carry out next procedure construction after solidifying 50h at normal temperatures;
4) unequal angle boring, installation
Angle steel drill adopts bench drill and Electric portable drill, and drill bit adopts 18mm drill bit, uses angle steel manomelia to sample on bolt, draw bolt position, then hole before boring; Namely monolithic angle steel installs angle steel after completing boring, manually direct angle steel is placed on bolt, as bolt hole indivedual in installation process and bolt misplace, gas cutting reaming can be adopted, screwing screw is got final product after installation, check the verticality of the long limb of angle steel, unclamp screw as out of plumb and add wedge adjustment, note angle steel long limb verticality when another side angle steel is installed and stitch wide as not being inconsistent and can suitably adjusting;
5) temporary consolidation
After concrete bridge deck pavement, Ф 20 reinforcing bar is used to be welded in the long limb upper limb of angle steel every one meter of point, the horizontal thrust produced when timber wedge is inserted to resist and to pave pitch in middle part;
6) TST expansion joints without seals bonding material
Pave after pitch, remove temporary consolidation construction bottom Ф 10 round steel, Ф 10 round steel is welded on angle steel flex point place, side; Second layer construction first fills in pledget, reinstalls elastic colloid filler, adopts TST expansion joints without seals binding material; Specifically comprise following processing step:
(1) gap is cleared up: within the scope of the long limb of cleaning angle steel, pledget is with the foreign material of upper part;
(2) clean 0.5mm rubble: select in construction area appropriate location, use clear water to concentrate cleaning rubble;
(3) hot melt: use self-control TST fuse machine fusing TST expansion joints without seals bonding material;
(4) mix: mix appropriate 0.5mm rubble in fuse machine, uses the compound of mixing plant or artificial mix rubble and TST, stirs;
(5) TST compound is manually poured into apart from road surface 1cm;
(6) perfusion is without the TST bonding material sealing of rubble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410721642.0A CN104594199B (en) | 2014-12-03 | 2014-12-03 | A kind of Reinforced Concrete Bridge longitudinally connected construction method of framing longitudinal joint |
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| CN201410721642.0A CN104594199B (en) | 2014-12-03 | 2014-12-03 | A kind of Reinforced Concrete Bridge longitudinally connected construction method of framing longitudinal joint |
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| CN104594199A true CN104594199A (en) | 2015-05-06 |
| CN104594199B CN104594199B (en) | 2016-07-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625280A (en) * | 2018-04-11 | 2018-10-09 | 王涛 | A kind of bridge expanded joint structure and its construction method |
| CN112239998A (en) * | 2020-11-25 | 2021-01-19 | 无锡市政设计研究院有限公司 | Construction method of novel bridge deck expansion joint structure |
| CN112239999A (en) * | 2020-11-25 | 2021-01-19 | 无锡市政设计研究院有限公司 | Novel bridge floor expansion joint structure |
| CN113152310A (en) * | 2021-02-02 | 2021-07-23 | 浙江顺畅高等级公路养护有限公司 | Quick maintenance technical method for failure screw of comb-tooth type expansion joint |
| CN113215975A (en) * | 2021-06-04 | 2021-08-06 | 大连市市政设计研究院有限责任公司 | Hidden longitudinal settlement joint of double-width bridge and construction method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888259A (en) * | 2016-03-31 | 2016-08-24 | 张友谊 | Concrete steel bar planting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015667A1 (en) * | 1979-03-09 | 1980-09-17 | Gencorp Inc. | Expansion joint sealing assembly and method for its installation |
| US4305680A (en) * | 1979-12-03 | 1981-12-15 | Old North Manufacturing Co., Inc. | Roadway joint and seal and method of fabricating same |
| CN2297478Y (en) * | 1997-06-24 | 1998-11-18 | 张宏生 | Expansion joint for bridge |
| CN201148594Y (en) * | 2007-12-29 | 2008-11-12 | 李鹏 | Improved bridge telescoping device |
| CN201695530U (en) * | 2010-04-23 | 2011-01-05 | 中国水电顾问集团华东勘测设计研究院 | Indoor after-treatment structure for dividing joints of buildings |
| CN201835228U (en) * | 2010-07-30 | 2011-05-18 | 杭州科博桥梁加固养护有限公司 | Bridge expansion joint structure |
| CN203878467U (en) * | 2014-05-09 | 2014-10-15 | 山西省交通科学研究院 | Bridge expansion joint transition area concrete structure |
-
2014
- 2014-12-03 CN CN201410721642.0A patent/CN104594199B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015667A1 (en) * | 1979-03-09 | 1980-09-17 | Gencorp Inc. | Expansion joint sealing assembly and method for its installation |
| US4305680A (en) * | 1979-12-03 | 1981-12-15 | Old North Manufacturing Co., Inc. | Roadway joint and seal and method of fabricating same |
| CN2297478Y (en) * | 1997-06-24 | 1998-11-18 | 张宏生 | Expansion joint for bridge |
| CN201148594Y (en) * | 2007-12-29 | 2008-11-12 | 李鹏 | Improved bridge telescoping device |
| CN201695530U (en) * | 2010-04-23 | 2011-01-05 | 中国水电顾问集团华东勘测设计研究院 | Indoor after-treatment structure for dividing joints of buildings |
| CN201835228U (en) * | 2010-07-30 | 2011-05-18 | 杭州科博桥梁加固养护有限公司 | Bridge expansion joint structure |
| CN203878467U (en) * | 2014-05-09 | 2014-10-15 | 山西省交通科学研究院 | Bridge expansion joint transition area concrete structure |
Non-Patent Citations (2)
| Title |
|---|
| 王松: "无缝伸缩缝在成雅高速桥面铺装维修中的应用", 《西南公路》 * |
| 王绍海: "浅谈沪杭甬高速公路拓宽工程新老桥梁纵缝拼接施工", 《公路》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625280A (en) * | 2018-04-11 | 2018-10-09 | 王涛 | A kind of bridge expanded joint structure and its construction method |
| CN112239998A (en) * | 2020-11-25 | 2021-01-19 | 无锡市政设计研究院有限公司 | Construction method of novel bridge deck expansion joint structure |
| CN112239999A (en) * | 2020-11-25 | 2021-01-19 | 无锡市政设计研究院有限公司 | Novel bridge floor expansion joint structure |
| CN113152310A (en) * | 2021-02-02 | 2021-07-23 | 浙江顺畅高等级公路养护有限公司 | Quick maintenance technical method for failure screw of comb-tooth type expansion joint |
| CN113215975A (en) * | 2021-06-04 | 2021-08-06 | 大连市市政设计研究院有限责任公司 | Hidden longitudinal settlement joint of double-width bridge and construction method |
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| CN104594199B (en) | 2016-07-06 |
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