CN102808371B - The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method - Google Patents
The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method Download PDFInfo
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- CN102808371B CN102808371B CN201210295006.7A CN201210295006A CN102808371B CN 102808371 B CN102808371 B CN 102808371B CN 201210295006 A CN201210295006 A CN 201210295006A CN 102808371 B CN102808371 B CN 102808371B
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Abstract
The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method, this overlapping Continuous Bridge includes inverted T-shaped prestressing force precast beam part, after water part and diaphragm plate, it is characterized in that described cast-in-place part includes the cast-in-place lamination portion of Bars In Poured Concrete Slab and beam top, inverted T-shaped prestressing force precast beam lower flange and web top are all embedded with pretensioned prestressing steel strand wires, Bars In Poured Concrete Slab bottom surface between two precast beams is provided with galvanized steel plain sheet, described diaphragm plate is precoated plate, diaphragm plate is along being longitudinally vertically installed at a certain distance between the web of the adjacent inverted T-beam above the edge of a wing of inverted T-beam.Inverted T-shaped pre-erection beam is from heavy and light, easy transportation and installation, and speed of application is fast.
Description
Technical field
The present invention relates to field of bridge construction, particularly relate to a kind of Prefabricated integral bridge
Background technology
The traffic of medium and small span (12-30 rice) generally uses prestress box beam or beam type bridge with municipal administration bridge, to use Post-tension Prestress Construction in the majority, during as used freely-supported to design, deck-molding is generally large, prefabricated beam or plate are from great, transport and installation need main equipment, manufacture and installation rate is slow, the template making employing different size of beam, template poor universality, template amortization cost is high, precast bridge connection globality is poor, additionally, post-stressed need to steel strand wires overlap ipe grout, deformed bar corrosion can be brought to make the poor durability of bridge produce security risk during grouting leakiness, above-mentioned this bridge is big from great steel using amount, cost is high, the low light-duty I-shaped overlapping Continuous Bridge of a kind of cost have not been reported.
Summary of the invention
The technical problem to be solved is to overcome the deficiency of above-mentioned prior art, it is provided that a kind of from heavy and light, the integral precast overlapping Continuous Bridge of simple-supported thencontinuous that cost is low and construction method.
Integral precast overlapping Continuous Bridge according to a kind of simple-supported thencontinuous that the present invention provides, including inverted T-shaped prestressing force precast beam part, after water part and diaphragm plate, described cast-in-place part includes the cast-in-place lamination portion of Bars In Poured Concrete Slab and beam top, inverted T-shaped prestressing force precast beam lower flange and web top are all embedded with pretensioned prestressing steel strand wires, described diaphragm plate is precoated plate, described diaphragm plate edge is longitudinally arranged between the web of adjacent inverted T-shaped prestressing force precast beam at a certain distance, and is positioned at above the lower flange of described precast beam.
The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous provided according to the present invention also has a following attached technical characteristic:
The web upper surface of described inverted T-shaped prestressing force precast beam is along longitudinally perpendicular bar dowel or the angle steel of being embedded with, in the concrete of bar dowel or angle steel upper end embedment Bars In Poured Concrete Slab.
Along longitudinally burying the parabolic elongated non-binding prestress wire being cased with sleeve pipe underground in the beam body of described inverted T-shaped prestressing force precast beam, the un-bonded prestressed steel strand level exposing precast beam is embedded in described Bars In Poured Concrete Slab, described un-bonded prestressed steel strand at least one end be linked with anchorage and be anchored in adjacent across Bars In Poured Concrete Slab in.
Bars In Poured Concrete Slab bottom surface between two precast beams is provided with sheet metal as permanent formwork, and described sheet metal is flat die mould galvanized steel plain sheet of remaining silent.
The most embedding at the bottom of the plate face of described Bars In Poured Concrete Slab and plate have two-way concrete slab, is embedded with longitudinal reinforcement in the cast-in-place lamination portion in beam top and diaphragm plate top cast-in-place part stirrup.
Described diaphragm plate is flat board or groove is vertically left at its two ends of inverted T shaped plate, and diaphragm plate bottom is longitudinally provided with through hole, is installed with un-bonded prestressed steel strand or reinforcing bar, is filled with concrete between diaphragm plate and inverted T-shaped prestressing force precast beam and in diaphragm plate through hole in through hole.
Being embedded with linear un-bonded prestressed steel strand separately along beam vertical equity in the Bars In Poured Concrete Slab on adjacent bridge end top, un-bonded prestressed steel strand at least one end is provided with anchorage and is anchored in concrete plate, and adjacent un-bonded prestressed steel strand one end is horizontally formed U-shaped.
Pier cap beam is provided with concrete crossbeam, and described crossbeam is integral precast or the most cast-in-place beam-ends entirety prefabricated with inverted T-shaped prestressing force joins together.
Comprise the following steps according to the construction method of the integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous of present invention offer:
A, by inverted T-shaped prestressing force precast beam lifting be held on pier cap beam；
B, installation diaphragm plate, wear un-bonded prestressed steel strand in diaphragm plate；
C, beam end prick muscle formwork, lay flat die mould galvanized steel plain sheet permanent template or the self-bearing type steel bar girder permanent template of remaining silent；
Un-bonded prestressed steel strand in placing of reinforcement and Bars In Poured Concrete Slab on placing of reinforcement at the bottom of D, colligation Bars In Poured Concrete Slab and inverted T-shaped prestressing force precast beam top, diaphragm plate upper reinforcement and a range of Bars In Poured Concrete Slab of beam end；
E, water and smash a range of complete thick hoard strip concrete in adjacent bridge end on bridge pier and the thick ground floor concrete of middle part hoard strip 50-70mm；
After F, concrete reach some strength, the un-bonded prestressed steel strand in stretch-draw Bars In Poured Concrete Slab and the un-bonded prestressed steel strand within diaphragm plate also anchor with anchorage；
G, install the protection rib template at the un-bonded prestressed steel strand anchorage of diaphragm plate and other segment template；
H, disposably water and smash Bars In Poured Concrete Slab remainder concrete；
I, remove all templates, complete to overlap Continuous Bridge.
When diaphragm plate described in step B is as used inverted T-shaped diaphragm plate, wearing ordinary steel twisted wire in its longitudinal hole and replace un-bonded prestressed steel strand, common steel strand tension is carried out after being in the milk and reach some strength between the web of the lower flange of inverted T-shaped diaphragm plate and inverted T-shaped prestressing force precast beam.
Overlap Continuous Bridge according to the integral precast of a kind of simple-supported thencontinuous of present invention offer and construction method compared with prior art has the advantage that
1, inverted T-shaped pre-erection beam is from heavy and light, easy transportation and installation, and speed of application is fast.
2, bridge uses the design and construction process of simple-supported thencontinuous, makes bridge height reduce, and weight reduction, cost is greatly reduced.
3, prefabricated inverted T-shaped part beam uses the manufacture mould with universal building, template highly versatile, and convenient to assemble and disassemble, work efficiency is high, template amortization low cost.
4, precast beam uses pre-tensioning system long-line pedestal to make, and eliminates duct grouting technique, has stopped the hidden danger of quality of steel strand wires corrosion.
5, bridge lateral sets prestressing force diaphragm plate, bridge good integrity beam, and beam cooperative bearing performance is good.
6, Bars In Poured Concrete Slab concrete secondary is used to water the technique smash, the problem solving inverted T-beam bending resistance difference, make beam construction stage moment of flexure when watering concrete for the first time reduce, so that the arrangement of reinforcement of beam reduces, deck-molding reduces.
7, permanent steel form is used, easy construction, safety.Additionally because plate is across less, profiled sheet construction stage moment of flexure is less, and steel plate thickness is little, and cost increases few, especially with steel bar girder steel board, makes to water tamping iron the old and new's concrete binding ability in two times and improves.
8, burying unbonded prestressing tendon in beam support overlapping layers underground, and reach the easy constructions such as intensity post-stretching, steel strand anchoring, stretch-draw at support plate concrete, continuous beam stress performance is good, good endurance.
9, in precast beam, the un-bonded prestressed steel strand of falling parabola doubles as continuous beam negative bending moment rib, not only easy construction, and cost saves, and solves web plate Inclined Cracking problem.
Accompanying drawing explanation
Fig. 1 is the bridge structure chart of the present invention.
Fig. 2 is the sectional view of A-A in Fig. 1.
Fig. 3 is the sectional view of B-B in Fig. 1.
Fig. 4 is the beam-ends arrangement of reinforcement enlarged drawing of the present invention.
Fig. 5 is the sectional view of C-C in Fig. 2.
Fig. 6 is the sectional view of D-D in Fig. 5.
Fig. 7 is flat die mould galvanized steel plain sheet axonometric chart of remaining silent in the present invention.
Fig. 8 is the self-bearing type steel bar girder permanent template axonometric chart in the present invention.
Fig. 9 is axonometric chart and the construction arrangement of reinforcement of diaphragm plate in the present invention
Figure 10 is precast beam axonometric chart of the present invention
Detailed description of the invention
See Fig. 1 to Figure 10, the embodiment of the integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous be given in the present invention, including inverted T-shaped prestressing force precast beam part 1, cast-in-place part 2 and diaphragm plate 3, described cast-in-place part 2 includes the cast-in-place lamination portion of Bars In Poured Concrete Slab 21 and beam top 22, inverted T-shaped prestressing force precast beam 1 lower flange 11 and web 12 top are all embedded with pretensioned prestressing steel strand wires 4, described diaphragm plate 3 is precoated plate, described diaphragm plate 3 is arranged between the web 12 of adjacent inverted T-shaped prestressing force precast beam at a certain distance along longitudinal direction, and be positioned at above the lower flange 11 of described precast beam 1.The present invention constitutes an overlapping Continuous Bridge by precast beam 1 and prefabricated diaphragm plate 3 with cast-in-place part 2, makes bridge lightness, reasonable stress, can not only accelerate speed of application, cost also can be greatly lowered.
Seeing Fig. 1, in above-described embodiment that the present invention is given, web 12 upper surface of described invertible T-shaped precast beam 1 is along longitudinally perpendicular bar dowel or the angle steel 13 of being embedded with, in the concrete of bar dowel or angle steel 13 upper end embedment Bars In Poured Concrete Slab 22.Described reinforcing bar or angle steel 13 can improve precast beam 1 and the connection of cast-in-place part 2, meet the shear bond strength strength demand of new concrete faying face.
See Fig. 1 and Fig. 4 and Figure 10, in above-described embodiment that the present invention is given, along longitudinally burying the parabolic elongated un-bonded prestressed steel strand 14 being cased with sleeve pipe underground in described invertible T-shaped precast beam 1 beam body, un-bonded prestressed steel strand 14 level exposing precast beam is embedded in cast-in-place part 2, un-bonded prestressed steel strand 14 at least one end be linked with anchorage 141 and be anchored in adjacent across the cast-in-place part of beam 22 in.Described un-bonded prestressed steel strand 14 can solve the problem that the problem that Longspan Bridge Inclined Cracking is weaker.And this un-bonded prestressed steel strand upper end can also act as negative moment of backing plate muscle, the globality that beam the old and new's concrete combines, killing three birds with one stone can be increased again simultaneously.
Seeing Fig. 2, Fig. 3, Fig. 7, Fig. 8, in above-described embodiment that the present invention is given, Bars In Poured Concrete Slab 21 bottom surface between two precast beams 1 is provided with sheet metal 5 as permanent formwork, and described sheet metal 5 is flat die mould galvanized steel plain sheet 51 of remaining silent, as shown in Figure 7.The self-bearing type steel bar girder permanent template 52 that described steel plate 5 is interrupted at precast beam, as shown in Figure 8 thus eliminate a large amount of supports in bottom, above-mentioned sheet metal galvanized steel plain sheet 51 and 52 can be as permanent formwork, without dismounting, easy construction, it addition, self-bearing type steel bar girder permanent template can also strengthen plate waters the overall performance of the old and new's concrete faying face when smashing in two times, certain Bars In Poured Concrete Slab may be used without the Bars In Poured Concrete Slab of tradition formwork.
See Fig. 2, Fig. 3 and Fig. 6, in above-described embodiment that the present invention is given, the most embedding at the bottom of the plate face of described Bars In Poured Concrete Slab 21 and plate have two-way concrete slab 23, it is embedded with longitudinal reinforcement 25 in the cast-in-place lamination portion in beam top and diaphragm plate 3 top cast-in-place part stirrup 24, described plate muscle is as the distributing bar of plate stress Yu resisted shrinkage, also simultaneously as the negative reinforcement of beam-ends.
See Fig. 5, Fig. 6, Fig. 9, in above-described embodiment that the present invention is given, groove 31 is vertically left at described diaphragm plate 3 two ends, diaphragm plate 3 bottom is longitudinally provided with through hole 32, through hole 32 is installed with prestress wire or reinforcing bar 4, between prefabricated diaphragm plate 3 and inverted T-shaped prestressing force precast beam 1 and in diaphragm plate 3 through hole 32, is filled with concrete.Concrete forms a beam type overall structure together with being cast in inverted T-shaped prestressing force precast beam 1 by diaphragm plate 3, make adjacent beams collaborative and, prefabricated diaphragm plate uses plate or inverted T-shaped.
Seeing Fig. 1 and Fig. 4, in above-described embodiment that the present invention is given, the alternate un-bonded prestressed steel strand 26 that is embedded with of level in the Bars In Poured Concrete Slab 21 on beam-ends top, steel strand wires 26 end is provided with anchorage 141 and is anchored in concrete plate.For reducing anchorage quantity, two steel strand wires 26 one end can be connected to U-shaped.These steel strand wires 26 undertake negative moment of girder, make top not ftracture and improve the durability of bridge.
Seeing Fig. 1 to Fig. 5, in above-described embodiment that the present invention is given, described pier cap beam 99 is provided with concrete crossbeam 9, and described crossbeam 9 can use integral precast and the most cast-in-place make it join together with composite beam end entirety, and crossbeam 9 concrete can rise cast-in-place with Bars In Poured Concrete Slab concrete one.Integral precast crossbeam formwork is convenient.
The integral precast be given according to the present invention overlaps the construction method of bridge and comprises the following steps:
A, by invertible T-shaped precast beam 1 lifting be held on pier cap beam 99；
B, installation diaphragm plate 3, wear steel strand wires 45 in diaphragm plate；
C, beam end prick muscle formwork, lay flat die mould galvanized steel plain sheet permanent template or the self-bearing type steel bar girder permanent template of remaining silent；
Un-bonded prestressed steel strand 26 and 15 in placing of reinforcement and Bars In Poured Concrete Slab on placing of reinforcement 23 at the bottom of D, colligation Bars In Poured Concrete Slab and beam top, diaphragm plate upper reinforcement and a range of Bars In Poured Concrete Slab of beam end；
E, water and smash a range of complete thick hoard strip concrete of adjacent bridge end on bridge pier and the thick middle part strip ground floor concrete of middle part hoard strip 50-70mm；Here strip concrete refers to complete thick concrete, and middle part refers to the middle part of length direction.
After F, concrete reach some strength, un-bonded prestressed steel strand in stretch-draw Bars In Poured Concrete Slab 26 and 15 and the un-bonded prestressed steel strand 45 within diaphragm plate also anchor 141 with anchorage；
G, install and at diaphragm plate presstressed reinforcing steel anchorage, protect rib template and other segment template；
H, disposably water and smash Bars In Poured Concrete Slab remainder concrete；
I, remove all templates, complete to overlap Continuous Bridge.
When diaphragm plate described in step B is as used inverted T-shaped diaphragm plate, wearing ordinary steel twisted wire in its hole and replace non-binding prestress wire, common steel strand tension is carried out after being in the milk and reach some strength between the web of the lower flange of inverted T-shaped diaphragm plate and inverted T-shaped prestressing force precast beam.
The bridge that the above-mentioned construction method of the present invention completes, speed is fast, low cost.
Claims (10)
1. an integral precast overlapping Continuous Bridge for simple-supported thencontinuous, including inverted T-shaped prestressing force precast beam part, cast-in-place
Part and diaphragm plate, is characterized in that described cast-in-place part includes the cast-in-place lamination portion of Bars In Poured Concrete Slab and beam top, inverted T-shaped
Prestressing force precast beam lower flange and web top are all embedded with pretensioned prestressing steel strand wires, and described diaphragm plate is prefabricated
Plate, described diaphragm plate edge is longitudinally arranged between the web of adjacent inverted T-shaped prestressing force precast beam at a certain distance, and
It is positioned at above the lower flange of described precast beam.
Overlap Continuous Bridge the most as claimed in claim 1, it is characterized in that table on the web of described inverted T-shaped prestressing force precast beam
Face is along longitudinally perpendicular bar dowel or the angle steel of being embedded with, in the concrete of bar dowel or angle steel upper end embedment Bars In Poured Concrete Slab.
Overlap Continuous Bridge the most as claimed in claim 1, it is characterized in that edge in the beam body of described inverted T-shaped prestressing force precast beam
Longitudinally bury the parabolic elongated un-bonded prestressed steel strand being cased with sleeve pipe underground, expose the soap-free emulsion polymeization of precast beam
Prestress wire level is embedded in described Bars In Poured Concrete Slab, and described un-bonded prestressed steel strand at least one end is linked with anchor
Have and be anchored in adjacent across Bars In Poured Concrete Slab in.
Overlap Continuous Bridge the most as claimed in claim 1, it is characterized in that the Bars In Poured Concrete Slab bottom surface between two precast beams is provided with thin
Steel plate is as permanent formwork, and described sheet metal is flat die mould galvanized steel plain sheet of remaining silent.
Overlap Continuous Bridge the most as claimed in claim 1, it is characterized in that at the bottom of the plate face of described Bars In Poured Concrete Slab and plate the most embedding have double
It is embedded with longitudinal reinforcement in reinforcing bar, the cast-in-place lamination portion in beam top and diaphragm plate top cast-in-place part stirrup.
Overlapping Continuous Bridge the most as claimed in claim 1, it is characterized in that described diaphragm plate is flat board or inverted T shaped plate, they are two years old
End vertically leaves groove, and diaphragm plate bottom is longitudinally provided with through hole, is installed with un-bonded prestressed steel strand or reinforcing bar in through hole,
It is filled with concrete between diaphragm plate and inverted T-shaped prestressing force precast beam and in diaphragm plate through hole.
Overlap Continuous Bridge the most as claimed in claim 1, longitudinal along beam in it is characterized in that the Bars In Poured Concrete Slab on adjacent bridge end top
Horizontal interval is embedded with un-bonded prestressed steel strand, and un-bonded prestressed steel strand at least one end is provided with anchorage and is anchored in existing
Watering in the concrete of plate, adjacent un-bonded prestressed steel strand at least one end level is unified into U-shaped.
Overlapping Continuous Bridge the most as claimed in claim 1, it is characterized in that pier cap beam is provided with concrete crossbeam, described crossbeam is
Integral precast or the most cast-in-place join together with inverted T-shaped prestressing force precast beam end entirety.
9. a construction method for the integral precast overlapping Continuous Bridge of simple-supported thencontinuous, comprises the following steps:
A, by inverted T-shaped prestressing force precast beam lifting be held on pier cap beam；
B, installation diaphragm plate, wear un-bonded prestressed steel strand in diaphragm plate；
C, beam end prick muscle formwork, lay flat die mould galvanized steel plain sheet permanent template or the self-bearing type steel bar girder permanent template of remaining silent；
Placing of reinforcement at the bottom of D, colligation Bars In Poured Concrete Slab and inverted T-shaped prestressing force precast beam top, diaphragm plate upper reinforcement and the certain model of beam end
Enclose the un-bonded prestressed steel strand in placing of reinforcement and Bars In Poured Concrete Slab on interior Bars In Poured Concrete Slab；
E, water and smash a range of complete thick hoard strip concrete in adjacent bridge end on bridge pier and middle part hoard strip 50-70mm is thick
Ground floor concrete；
After F, concrete reach some strength, the un-bonded prestressed steel strand in stretch-draw Bars In Poured Concrete Slab and the soap-free emulsion polymeization within diaphragm plate are pre-
Prestress steel strand also anchors with anchorage；
G, install the protection rib template at the un-bonded prestressed steel strand anchorage of diaphragm plate and other segment template；
H, disposably water and smash Bars In Poured Concrete Slab remainder concrete；
I, dismounting template in addition to permanent template, complete to overlap Continuous Bridge.
10. construction method as claimed in claim 9, is characterized in that when the diaphragm plate described in step B uses inverted T-shaped diaphragm plate,
Wearing ordinary steel twisted wire in its longitudinal hole and replace non-binding prestress wire, common steel strand tension is horizontal at inverted T-shaped
Carry out after being in the milk and reach some strength between the lower flange of dividing plate and the web of inverted T-shaped prestressing force precast beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210295006.7A CN102808371B (en) | 2012-08-20 | 2012-08-20 | The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method |
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| CN201210295006.7A CN102808371B (en) | 2012-08-20 | 2012-08-20 | The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method |
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| CN103938533B (en) * | 2013-01-23 | 2016-01-20 | 上海市城市建设设计研究总院 | The construction method of Simply supported non-uniform structure |
| CN103266572B (en) * | 2013-06-03 | 2015-12-30 | 中铁大桥局集团第四工程有限公司 | A kind of Multifunctional construction platform for straining beam cast-in-place construction between double width bridge |
| CN103437561B (en) * | 2013-07-18 | 2015-10-14 | 浙江中隧桥波形钢腹板有限公司 | Freely-supported turns continuous interconnection box-beam structure |
| CN103628410B (en) * | 2013-11-21 | 2016-04-13 | 中建三局建设工程股份有限公司 | A kind of transverse partition plate reinforcement cage and making, mounting method |
| CN103774560B (en) * | 2014-01-28 | 2015-08-19 | 浙江大舜公路建设有限公司 | The curved bridge construction engineering method of suspension type cast-in-situ template |
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| CN101942808A (en) * | 2010-09-30 | 2011-01-12 | 长沙理工大学 | Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section |
| CN102587286A (en) * | 2012-03-28 | 2012-07-18 | 上海市第四建筑有限公司 | Simply supported-continuous construction method for bridge superstructure |
| CN202830729U (en) * | 2012-08-20 | 2013-03-27 | 杨众 | First simply supported then continuously supported precast integral-pouring stacking continuous bridge |
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| JPH11229329A (en) * | 1998-02-10 | 1999-08-24 | Kawasaki Steel Corp | Constructing method for steel-concrete composite floor board bridge |
| US7461427B2 (en) * | 2004-12-06 | 2008-12-09 | Ronald Hugh D | Bridge construction system and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942808A (en) * | 2010-09-30 | 2011-01-12 | 长沙理工大学 | Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section |
| CN102587286A (en) * | 2012-03-28 | 2012-07-18 | 上海市第四建筑有限公司 | Simply supported-continuous construction method for bridge superstructure |
| CN202830729U (en) * | 2012-08-20 | 2013-03-27 | 杨众 | First simply supported then continuously supported precast integral-pouring stacking continuous bridge |
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