CN102220739B - Corrugated steel web prestressed concrete continuous box girder and construction method thereof - Google Patents

Corrugated steel web prestressed concrete continuous box girder and construction method thereof Download PDF

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Publication number
CN102220739B
CN102220739B CN201110085548A CN201110085548A CN102220739B CN 102220739 B CN102220739 B CN 102220739B CN 201110085548 A CN201110085548 A CN 201110085548A CN 201110085548 A CN201110085548 A CN 201110085548A CN 102220739 B CN102220739 B CN 102220739B
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China
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concrete
cast
precast concrete
diaphragm
box girder
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CN201110085548A
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Chinese (zh)
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CN102220739A (en
Inventor
汤意
李宏瑾
吴继峰
刘江
周恒�
乐艺
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河南省交通规划勘察设计院有限责任公司
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Priority to CN201110085548A priority Critical patent/CN102220739B/en
Publication of CN102220739A publication Critical patent/CN102220739A/en
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Abstract

The invention discloses a corrugated steel web prestressed concrete continuous box girder. In the box girder, after being fixedly connected with a corresponding steel bar in a cast-in-place member, transverse steel bars of a precast concrete top plate, a precast concrete bottom plate and a precast concrete beam or a precast concrete diaphragm plate of two adjacent corrugated steel web prestrssed concrete flanged beam units which are erected are connected by a cast-in-place concrete top plate between the adjacent precast concrete top plates, a cast-in-place concrete bottom plate between the adjacent precast concrete bottom plates and a cast-in-place concrete beam or a cast-in-place concrete diaphragm plate between the adjacent precast concrete beams or precast concrete diaphragm plates to form closed box girders; and external prestressed bars in the closed box girders are pulled and anchored, the closed girders corresponding to two adjacent holes are connected by pouring cast-in-place concrete longitudinal beams, hogging moment prestressed bars on pillar tops are pulled and anchored, and temporary supports are removed to form the continuous box girder. The corrugated steel web prestressed concrete continuous box girder has the characteristics of high stressed performance, high utilization rate of materials and obvious economic benefit, and is easy and convenient to construct.

Description

A kind of Wavelike steel webplate prestressed concrete continuous box girder and job practices

Technical field

The invention belongs to the bridge technology field of highway and railway, what relate generally to is a kind of Wavelike steel webplate prestressed concrete continuous box girder and job practices.

Background technology

The Wavelike steel webplate prestressed concrete box girder is as a kind of novel steel-concrete combined structure; Concrete resistance to compression, advantage that Wavelike steel webplate shearing resistance yield strength is high have been made full use of; Effectively steel, two kinds of materials of concrete are combined; Improved the service efficiency of material, be a kind of economy, rationally, form of structure efficiently.Existing Wavelike steel webplate prestressed concrete box girder adopts two kinds of job practicess of cast-in-place and prefabricated installation usually.

As shown in Figure 1: as to adopt the Wavelike steel webplate prestressed concrete box girder member of cast-in-place method construction mainly (to be positioned at beam-ends and to be called crossbeam by Wavelike steel webplate 1, upper connector 2, following connector 3, cast-in-site concrete roof plate 7, cast-in-situ concrete base plate 8, cast-in-situ concrete crossbeam or diaphragm 9; Be positioned at span centre and be called diaphragm, as follows), presstressed reinforcing steel 11, external prestressing muscle 12 and pier top hogging moment presstressed reinforcing steel 13 are formed in the bottom-plate body.Wavelike steel webplate 1 is transported to the job site with connector 2,3 up and down and positions installation after factory's welding, set up support or adopt cantilever pouring case beam concrete.The construction of cast-in-place method exists field operation and difficulty of construction bigger; Problems such as long construction period; The joint portion of underplate concrete and following connector is because the operating space is narrow and small simultaneously, and the concrete pouring work difficulty is bigger, may have influence on joint portion Concrete Construction quality and durability of structures.

As shown in Figure 2: as to adopt the Wavelike steel webplate prestressed concrete box girder member of prefabricated mounting method construction mainly to form by Wavelike steel webplate 1, upper connector 2, following connector 3, precast concrete top board 4, precast concrete base plate 5, precast concrete crossbeam or diaphragm 6, cast-in-site concrete roof plate 7, cast-in-situ concrete crossbeam or diaphragm 9, external prestressing muscle 12 and pier top hogging moment presstressed reinforcing steel 13.Be employed in precast yard's standardization prefabricated each operation of Wavelike steel webplate prestressed concrete box girder and construction quality better assurance is all arranged; But prefabricated Wavelike steel webplate prestressed concrete box girder is for satisfying conventional erection equipment needs; Be many casees box-beam structure; Every case beam transverse width is little, and web quantity is many, and rolled steel dosage is big; Along with prefabricated case beam is striden increase directly, every case beam erection weight also increases thereupon, and conventional construction equipment has been difficult to satisfy installation requirement.These problems have caused certain difficulty for applying of this class formation.

Summary of the invention

The present invention is directed to the deficiency that prior art exists; A kind of continuous box girder and job practices that is made up of Wavelike steel webplate prestressed concrete i beam is provided; It had both had corrugated web PC Box Girder Structure advantage; Can effectively overcome the problem that above-mentioned cast-in-place and prefabricated Wavelike steel webplate prestressed concrete box girder runs into again, have that stress performance is good, stock utilization is high, easy construction is quick, the characteristics of remarkable in economical benefits.

The present invention realizes that the technical scheme that above-mentioned purpose is taked is: will set up after reinforcing bar is fixedly connected in transverse reinforcement and the corresponding cast-in-place member of precast concrete top board, precast concrete base plate, precast concrete crossbeam or diaphragm of adjacent two Wavelike steel webplate prestressed concrete i beam unit of installation; By the cast-in-situ concrete base plate between the cast-in-site concrete roof plate between the contiguous prefabricated concrete roof, the contiguous prefabricated concrete floor; Cast-in-situ concrete crossbeam between contiguous prefabricated concrete beam or the diaphragm or diaphragm connect the back and form closed case beam; External prestressing muscle in the closed case beam of stretch-draw and anchoring; With connecting through building the cast-in-situ concrete longeron between the closed case beam in adjacent two holes; Stretch-draw and anchoring pier top hogging moment presstressed reinforcing steel form continuous box girder.

The job practices of above-mentioned Wavelike steel webplate prestressed concrete continuous box girder is: with above-mentioned a plurality of i beams unit set up be installed on the Bridge Pier after; After reinforcing bar in the transverse reinforcement of precast concrete top board, precast concrete base plate, precast concrete crossbeam or the diaphragm of the adjacent i beam of direction across bridge unit and the corresponding cast-in-place member is fixedly connected; Through building cast-in-site concrete roof plate between the contiguous prefabricated concrete roof, between contiguous prefabricated concrete floor, building the cast-in-situ concrete base plate, after building cast-in-situ concrete crossbeam or diaphragm between contiguous prefabricated concrete beam or the diaphragm, promptly form closed case beam; External prestressing muscle in the closed case beam of stretch-draw and anchoring; With connecting through building the cast-in-situ concrete longeron between the closed case beam in adjacent two holes, stretch-draw and anchoring pier top hogging moment presstressed reinforcing steel are removed temporary support, carry out the system conversion, form continuous box girder.According to the wide difference of bridge, bridge laterally can be made up of single or a plurality of closed case beams, and the connected mode between connected mode between casing and i beam unit is basic identical.

The present invention has adopted Wavelike steel webplate prestressed concrete continuous box girder elder generation " breaking the whole up into parts ", and the form of construction work of " turning parts into the whole " again has following advantage than prior art:

(1) prefabricated i beam unit process vertical, horizontal cast-in-situ concrete connects, and forms continuous unitary closed case beam, and section rigidity is relatively large, has supporting capacity height, little, the comfortable advantage of driving a vehicle of distortion.

(2) Wavelike steel webplate prestressed concrete continuous box girder bridge second phase dead load and mobile load are by the case joist support load that forms; Prefabricated i beam only need be born dead load and working load; So every i beam sectional dimension is little, erection weight is light, and conventional construction equipment just can satisfy installation requirement.The corresponding Wavelike steel webplate prestressed concrete box girder that enlarged is again striden the footpath scope of application, has the particular structure advantage.

(3) structural key parts i beam adopts prefabricated; Be connected to form whole case beam through cast-in-place; Realized the construction of breaking the whole up into parts of Wavelike steel webplate prestressed concrete box girder has been enlarged the range of application of prefabricated construction method, be beneficial to batch production processing; Effectively guarantee construction quality, accelerated construction speed.

(4) I beam part adopts the Wavelike steel webplate combining structure, has given full play to the service efficiency of steel and concrete material, has reduced amount of concrete, energy-conserving and environment-protective, good economy performance.

Description of drawings

Fig. 1 is existing cast-in-place Wavelike steel webplate prestressed concrete box-beam bridge cross-sectional configuration sketch map.

Fig. 2 is existing prefabricated installation Wavelike steel webplate prestressed concrete box-beam bridge cross-sectional configuration sketch map.

Fig. 3 is the lateral opening and mesopore facade structures sketch map of continuous box girder that Wavelike steel webplate prestressed concrete i beam of the present invention constitutes.

Fig. 4 is that the lateral opening and mesopore top board of the continuous box girder that constitutes of Wavelike steel webplate prestressed concrete i beam of the present invention is looked up the plane structure sketch map.

Fig. 5 is the lateral opening and mesopore base plate top plan view structural representation of continuous box girder that Wavelike steel webplate prestressed concrete i beam of the present invention constitutes.

Fig. 6 is the continuous box girder cross-sectional configuration sketch map that Wavelike steel webplate prestressed concrete i beam of the present invention constitutes.

Among the figure: 1, Wavelike steel webplate, 2, upper connector, 3, connector down, 4, the precast concrete top board; 5, precast concrete base plate, 6, precast concrete crossbeam or diaphragm, 7, cast-in-site concrete roof plate; 8, cast-in-situ concrete base plate, 9, cast-in-situ concrete crossbeam or diaphragm, 10, the cast-in-situ concrete longeron; 11, presstressed reinforcing steel in the bottom-plate body, 12, the external prestressing muscle, 13, pier top hogging moment presstressed reinforcing steel.

The specific embodiment

In conjunction with accompanying drawing, it is following to provide embodiments of the invention, but the present invention does not limit to following examples.

Shown in Fig. 3~6: a kind of Wavelike steel webplate prestressed concrete continuous box girder; Its i beam unit mainly is made up of presstressed reinforcing steel 11 in Wavelike steel webplate 1, upper connector 2, following connector 3, precast concrete top board 4, precast concrete base plate 5, precast concrete crossbeam or diaphragm 6, the bottom-plate body; Upper connector 2 is positioned at the upper end of Wavelike steel webplate 1; Fixing with Wavelike steel webplate 1 welding, be embedded in the precast concrete top board 4.Upper connector 2 is made up of upper flange, Double Opening steel floor, cross-perforating reinforcing bar, and upper flange is a steel design, and two perforate steel floor bottoms vertically are welded on the upper flange end face along bridge, and transverse reinforcement passes from the perforate of Double Opening steel floor.Following connector 3 is positioned at the lower end of Wavelike steel webplate 1, is embedded in the precast concrete base plate 5.Following connector 3 can be Wavelike steel webplate 1 bottom opening in directly being embedded in precast concrete base plate 5; Transverse reinforcement passes from the Wavelike steel webplate 1 of perforate; Forming the concrete pin, and weld vertical stiffener or banded steel plate in the both sides of Wavelike steel webplate 1 and constitute; Also can be the welding lower wing plate in Wavelike steel webplate 1 lower end, and the many row's welderings of welding nail constitute under the lower wing plate bottom surface.Upper connector 2, following connector 3 that Wavelike steel webplate and concrete connecting portion are set play shearing resistance, anti-pulling effect, and to connector, the present invention is not limited to above-mentioned make, all can as long as can play the make of connector role.In Wavelike steel webplate 1 both sides precast concrete crossbeam or diaphragm 6 can be set as required.The two ends of Wavelike steel webplate 1 can directly be embedded in the precast concrete crossbeam 6, also can be embedded in the precast concrete crossbeam 6 through connector is set in the end.Wavelike steel webplate 1 both sides welding weldering nail connector in directly being embedded in precast concrete crossbeam 6 is to increase its bonding strength.In precast concrete top board 4, precast concrete base plate 5, precast concrete crossbeam or diaphragm 6, all suitably bury underground and outside the cross section, stretch out the vertical, horizontal connecting reinforcement.Wavelike steel webplate 1 waters with precast concrete top board 4, precast concrete base plate 5, prefabricated crossbeam or diaphragm 6 etc. respectively and builds up prefabricated units through upper connector 2, following connector 3; Presstressed reinforcing steel 11 in the bottom-plate body in stretch-draw and the anchoring precast concrete base plate 5 has formed prefabricated i beam unit.Reinforcing bar in the transverse reinforcement of precast concrete top board 4, precast concrete base plate 5, prefabricated crossbeam or the diaphragm 6 of adjacent two i beam unit and the corresponding cast-in-place member is fixedly connected the back, and (the present invention is not limited to above-mentioned joint construction mode; As long as the make that can play horizontal connection role all can); By being arranged on the cast-in-site concrete roof plate 7 between the contiguous prefabricated concrete roof 4, the cast-in-situ concrete base plate 8 between the contiguous prefabricated concrete floor 5, cast-in-situ concrete crossbeam between contiguous prefabricated concrete beam or the diaphragm 6 or diaphragm 9 laterally are connected to form closed case beam.

The job practices of above-mentioned Wavelike steel webplate prestressed concrete continuous box girder is: with above-mentioned a plurality of i beams unit set up be installed on the Bridge Pier after; After reinforcing bar in the transverse reinforcement of precast concrete top board 4, precast concrete base plate 5, prefabricated crossbeam or the diaphragm 6 of adjacent two the i beam unit of direction across bridge and the corresponding cast-in-place member is fixedly connected; Through building cast-in-site concrete roof plate 7 between the contiguous prefabricated concrete roof 4, between contiguous prefabricated concrete floor 5, building cast-in-situ concrete base plate 8; Between contiguous prefabricated concrete beam or diaphragm 6, build cast-in-situ concrete crossbeam or diaphragm 9, promptly form closed case beam after the connection.External prestressing muscle 12 in the closed case beam of stretch-draw and anchoring.Connect through building cast-in-situ concrete longeron 10 between the closed case beam of adjacent two holes correspondence, the pier top hogging moment presstressed reinforcing steel 13 in stretch-draw and the anchoring cast-in-site concrete roof plate 7 is removed temporary support, carries out the system conversion, the formation beam structure.According to the wide difference of bridge, bridge laterally can be made up of single or a plurality of closed case beams, and the connected mode between connected mode between casing and i beam unit is basic identical.

Claims (3)

1. Wavelike steel webplate prestressed concrete continuous box girder; It is characterized in that: will set up after reinforcing bar is fixedly connected in transverse reinforcement and the corresponding cast-in-place member of precast concrete top board (4), precast concrete base plate (5), precast concrete crossbeam or diaphragm (6) of adjacent two Wavelike steel webplate prestressed concrete i beam unit of installation; By the cast-in-situ concrete base plate (8) between the cast-in-site concrete roof plate between the contiguous prefabricated concrete roof (7), the contiguous prefabricated concrete floor (5); Cast-in-situ concrete crossbeam between contiguous prefabricated concrete beam or the diaphragm (6) or diaphragm (9) connect the back and form closed case beam; External prestressing muscle (12) in the closed case beam of stretch-draw and anchoring; With connecting through building cast-in-situ concrete longeron (10) between the closed case beam in adjacent two holes; Stretch-draw and anchoring pier top hogging moment presstressed reinforcing steel (13) form continuous box girder.
2. Wavelike steel webplate prestressed concrete continuous box girder according to claim 1; It is characterized in that: described i beam unit mainly is made up of Wavelike steel webplate (1), upper connector (2), following connector (3), precast concrete top board (4), precast concrete base plate (5), precast concrete crossbeam or diaphragm (6); Upper connector is positioned at the upper end of Wavelike steel webplate; Fixing with the Wavelike steel webplate welding, be embedded in the precast concrete top board; Following connector is positioned at the lower end of Wavelike steel webplate, is embedded in the precast concrete base plate; In the Wavelike steel webplate both sides precast concrete crossbeam or diaphragm are set; The two ends of Wavelike steel webplate directly are embedded in the precast concrete crossbeam; In precast concrete top board, precast concrete base plate, precast concrete crossbeam or diaphragm, all suitably bury underground and outside the cross section, stretch out the vertical, horizontal connecting reinforcement.
3. the job practices of a Wavelike steel webplate prestressed concrete continuous box girder; It is characterized in that: after being installed on a plurality of i beams unit on the Bridge Pier; After reinforcing bar in the transverse reinforcement of precast concrete top board (4), precast concrete base plate (5), precast concrete crossbeam or the diaphragm (6) of adjacent two the i beam unit of direction across bridge and the corresponding cast-in-place member is fixedly connected; Through building cast-in-site concrete roof plate (7) between the contiguous prefabricated concrete roof, between contiguous prefabricated concrete floor, building cast-in-situ concrete base plate (8), after building cast-in-situ concrete crossbeam or diaphragm (9) between contiguous prefabricated concrete beam or the diaphragm, be connected to form closed case beam; External prestressing muscle (12) in the closed case beam of stretch-draw and anchoring; With connecting through building cast-in-situ concrete longeron (10) between the closed case beam in adjacent two holes, stretch-draw and anchoring pier top hogging moment presstressed reinforcing steel (13) are removed temporary support, form continuous box girder.
CN201110085548A 2011-04-01 2011-04-01 Corrugated steel web prestressed concrete continuous box girder and construction method thereof CN102220739B (en)

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CN104195959B (en) * 2014-09-26 2016-03-23 中铁二十局集团第五工程有限公司 A kind of prefabricated Wavelike steel webplate PC i beam turns combination box bridge construction technique
CN104929034B (en) * 2015-06-25 2017-03-08 浙江大学 A kind of modularization steel reinforced concrete rapid construction small box girder bridge and its construction method
CN106758856B (en) * 2017-03-09 2018-07-24 河南省交通规划设计研究院股份有限公司 The construction method of the pretensioned prestressing corrugated steel web plate composite box girder of precast block
CN106758857B (en) * 2017-03-09 2018-05-08 河南省交通规划设计研究院股份有限公司 The construction method of precast block formula secondary prestress Wavelike steel webplate combination beam
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CN108943378A (en) * 2018-06-07 2018-12-07 广州市市政工程设计研究总院有限公司 A kind of method for prefabricating of UHPC small box girder end tabula

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