CN202610695U - Corrugated steel web type pre-tensioned prestressed concrete I-type beam - Google Patents

Corrugated steel web type pre-tensioned prestressed concrete I-type beam Download PDF

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Publication number
CN202610695U
CN202610695U CN 201220298283 CN201220298283U CN202610695U CN 202610695 U CN202610695 U CN 202610695U CN 201220298283 CN201220298283 CN 201220298283 CN 201220298283 U CN201220298283 U CN 201220298283U CN 202610695 U CN202610695 U CN 202610695U
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CN
China
Prior art keywords
precast concrete
wavelike steel
steel webplate
concrete
embedded
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Expired - Lifetime
Application number
CN 201220298283
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Chinese (zh)
Inventor
汤意
李宏瑾
李华强
吴继峰
乐艺
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Henan Provincial Communication Planning and Design Institute Co Ltd
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Henan Communications Planning Surver & Designing Institute Co Ltd
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Priority to CN 201220298283 priority Critical patent/CN202610695U/en
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Publication of CN202610695U publication Critical patent/CN202610695U/en
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Abstract

The utility model discloses a corrugated steel web type pre-tensioned prestressed concrete I-type beam, which mainly comprises a corrugated steel web (1), an upper connector (2), a lower connector (3), a precast concrete top plate (4) and a precast concrete bottom plate (5). The upper connector is arranged at the upper end of the corrugated steel web and is embedded in the precast concrete top plate; and the lower connector is arranged at the lower end of the corrugated steel web and is embedded in the precast concrete bottom plate, the two ends of the corrugated steel web are directly embedded in a precast concrete crossbeam, longitudinal connecting steel bars and horizontal connecting steel bars are appropriately embedded in the precast concrete top plate, the precast concrete bottom plate and the precast concrete crossbeam or a horizontal baffle and extend out towards the exterior of sections, and pre-tensioned prestressed ribs (11) are arranged in a unit bottom plate body of the precast I-type beam. The corrugated steel web type pre-tensioned prestressed concrete I-type beam has the advantages of good force bearing performance, simple process, simple procedures, short construction period, material-saving performance, small amount of maintenance and curing, good durability and the like.

Description

A kind of Wavelike steel webplate pretensioning prestressed concrete i beam
Technical field
The utility model belongs to the bridge technology field of highway and railway, and what relate generally to is a kind of Wavelike steel webplate pretensioning prestressed concrete i beam.
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.
" a kind of Wavelike steel webplate prestressed concrete i beam " that the applicant the has applied for (patent No.: ZL201120098202.6) compare with existing support or these two kinds job practicess commonly used of the cast-in-place and prefabricated installation of cantilever; 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.
But above-mentioned prefabricated i beam unit adopts post stretching to apply prestressing with bond usually, becomes the bonded prestress structure.Though this job practices equipment needed thereby is simple, ground tackle is embedded in the structure, does not need stretching bed seat, produces flexibly, is applicable to the site operation of large-scale component.But its pore-forming, lashing, mud jacking technology are numerous and diverse, and the construction period is long relatively slightly, and problems such as plug-hole, mud jacking is unreal, prestressing force is out of control possibly occur and influence construction quality and durability of structures.The bonded prestress concrete causes the concrete compressive stress to reduce because the effect of bonding resistance makes the prestressed reinforcement tensile stress reduce, and ground tackle forever is embedded in the structure and can not reuses, and has influenced stock utilization.If the mud jacking inappropriate technology, moisture is invaded, and possibly cause prestressing steel corrosion even fracture, causes prestressed concrete continuous beam bridge bearing ability deficiency, crack and continues downwarp.Prestressed reinforcement is accomplished once stretch-draw anchor, with receiving the threat that anchoring system lost efficacy.
Summary of the invention
The purpose of the utility model is the deficiency that exists to prior art; The prefabricated i beam of a kind of Wavelike steel webplate pretensioning prestressed concrete unit is provided; I beam can constitute a kind of continuous box girder thus; Both had corrugated web PC Box Girder Structure advantage; Can effectively overcome the problem that above-mentioned Wavelike steel webplate prestressed concrete box girder cast-in-place, prefabricated, post-tensioned construction runs into again, aspect such as, economic benefit simple and direct at stress performance, stock utilization, construction, later maintenance, durability has more significant advantage.
The utility model realizes that the technical scheme that above-mentioned purpose is taked is: a kind of Wavelike steel webplate pretensioning prestressed concrete i beam; Comprise Wavelike steel webplate, upper connector, following connector, precast concrete top board, precast concrete base plate; Upper connector is positioned at the upper end of Wavelike steel webplate, is embedded in the precast concrete top board; Following connector is positioned at the lower end of Wavelike steel webplate; Be embedded in the precast concrete base plate; 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, in said prefabricated i beam unit bottom-plate body, be provided with the pretensioned prestressing muscle.
The utility model is provided with precast concrete crossbeam or diaphragm at said Wavelike steel webplate.
The utility model is the weld horizontal steel plate in the both sides on said Wavelike steel webplate top, and the welding weldering is followed closely in the gap of horizontal steel plate, and welds vertical stiffener or banded steel plate in the both sides of waveform steel abdomen 1.
The utility model has following advantage than prior art:
⑴ it is prefabricated that pretensioning prestressed concrete beam is convenient to batch production; Compare with the posttension beam; Have that stress performance is good, operation is simple and direct, the duration is short, save material, maintenance amount less, advantages such as economy, good endurance, though increased the engineering quantity of precasting yard stretching bed seat end anchorage system, can save technology and equipment such as pore-forming, lashing, mud jacking, ground tackle; Avoided the plug-hole that possibly occur, problems such as mud jacking is unreal, prestressing force is out of control, anchoring system inefficacy; And anchoring system can reuse, and particularly long-line pedestal method is more suitable for extensive prefabricated processing, and economic benefit is more excellent.
⑵ precast beam unit connects through vertical, horizontal cast-in-situ concrete, 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.
⑶ 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; Precast beam only need be born dead load and working load; So every precast 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.
⑷ structural key parts precast 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 pretensioning prestressed concrete case beam has been enlarged the range of application of prefabricated construction method, be beneficial to batch production processing; Effectively guarantee construction quality, accelerated construction speed.
⑸ precast beam unit 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.
⑹ such as Wavelike steel webplate pre-tensioning system precast beam are born into the whole loads behind the bridge, then only need to adopt the pre-tensioning system construction technology, can cancel the external prestressing muscle in the body case beam.Technology and equipment such as the lashing of external prestressing muscle, transfer, ground tackle, stretch-draw have been saved.Construction technology is simpler like this, and economy is more outstanding.
Description of drawings
Fig. 1 is the cross-sectional configuration sketch map of the utility model i beam unit.
Fig. 2 is the facade structures sketch map that the utility model i beam constitutes continuous box girder.
Fig. 3 be Fig. 2 look up the plane structure sketch map.
Fig. 4 is the top plan view structural representation of Fig. 2.
Fig. 5 is the cross-sectional configuration sketch map of Fig. 2.
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, pretensioned prestressing muscle 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, the embodiment that provides the utility model is following, but the utility model is not limited to following examples.
As shown in Figure 1: the described a kind of Wavelike steel webplate pretensioning prestressed concrete i beam of present embodiment mainly is made up of pretensioned prestressing muscle 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; Be embedded in the Wavelike steel webplate 1 epimere perforate position in the precast concrete top board 4; Transverse reinforcement passes from the epimere perforate of Wavelike steel webplate 1; Forming the concrete pin, the weld horizontal steel plate in the both sides of Wavelike steel webplate 1 is imbedded in the concrete the not part of application to stop rain erosion Wavelike steel webplate 1; And double as concrete bottom die; The gap welding weldering nail of horizontal steel plate is connected with concrete to strengthen horizontal steel plate, and welds vertical stiffener or banded steel plate formation in the both sides of Wavelike steel webplate 1; Also can be made up of upper flange, Double Opening steel floor, transverse reinforcement, this upper flange is a steel design, and two Double Opening 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 the Wavelike steel webplate 1 bottom opening position in directly being embedded in precast concrete base plate 5; Transverse reinforcement passes from the perforate of Wavelike steel webplate 1; 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; To upper and lower connector, the utility model is not limited to above-mentioned make, all can as long as can play the make of connector role.According to structure stress and structure needs precast concrete crossbeam or diaphragm 6 can be set in Wavelike steel webplate 1 both sides.The two ends of Wavelike steel webplate 1 can directly be embedded in the precast concrete crossbeam 6, and the welding weldering is followed closely in Wavelike steel webplate 1 side, also can be embedded in the precast concrete crossbeam 6 through connector is set in the end, to increase bonding strength.The vertical, horizontal connecting reinforcement of in precast concrete top board 4, precast concrete base plate 5, precast concrete crossbeam or diaphragm 6, all burying underground and outside respective cross-section, stretching out.In prefabricated i beam unit bottom-plate body, be provided with presstressed reinforcing steel 11; This presstressed reinforcing steel 11 adopts the pre-tensioning system construction technology; Can avoid the deficiency of post-tensioned construction technology, help the large-scale industrialized manufacturing in prefabricated i beam unit and practice thrift cost, safeguard less, good endurance.Concrete construction technology is: precalculated position above the pre-tensioning system stretching bed seat (being the position of baseboard prestress muscle 11) stretch-draw baseboard prestress muscle 11; And with its anchoring temporarily on pedestal end or punching block; Mounting template, support on pedestal, installing and locating Wavelike steel webplate, colligation top, base plate reinforcing bar; 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; After treating that concrete strength reaches design and puts Zhang Qiangdu, loosen and cut off presstressed reinforcing steel 11, form Wavelike steel webplate pretensioning prestressed concrete i beam unit.
Present embodiment is when construction; Shown in Fig. 2-5: with above-mentioned a plurality of prefabricated i beams unit set up be installed on the Bridge Pier after; 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 is fixedly connected with reinforcing bar in the corresponding cast-in-place member (being cast-in-site concrete roof plate 7, cast-in-situ concrete base plate 8 and cast-in-situ concrete crossbeam or diaphragm 9) afterwards (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.In the cast-in-site concrete roof plate 7 of said closed case beam, be provided with pier top hogging moment presstressed reinforcing steel 13, also external prestressing muscle 12 can be set in case.External prestressing muscle 12 need not be provided with pier top hogging moment presstressed reinforcing steel 13 simultaneously; Because pier top hogging moment presstressed reinforcing steel is lower than external prestressing muscle cost; First-selection is provided with pier top hogging moment presstressed reinforcing steel 13 separately, when it can't satisfy force request, can change into external prestressing muscle 12 only is set; Also can be according to the structure stress needs, external prestressing muscle 12 is provided with pier top hogging moment presstressed reinforcing steel 13 simultaneously.

Claims (3)

1. Wavelike steel webplate pretensioning prestressed concrete i beam; Comprise Wavelike steel webplate (1), upper connector (2), following connector (3), precast concrete top board (4), precast concrete base plate (5); Upper connector is positioned at the upper end of Wavelike steel webplate, is embedded in the precast concrete top board; Following connector is positioned at the lower end of Wavelike steel webplate; Be embedded in the precast concrete base plate; 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, it is characterized in that: in said prefabricated i beam unit bottom-plate body, be provided with pretensioned prestressing muscle (11).
2. Wavelike steel webplate pretensioning prestressed concrete i beam according to claim 1 is characterized in that: be provided with precast concrete crossbeam or diaphragm (6) at said Wavelike steel webplate (1).
3. Wavelike steel webplate pretensioning prestressed concrete i beam according to claim 1; It is characterized in that: both sides weld horizontal steel plate on said Wavelike steel webplate (1) top; The welding weldering is followed closely in the gap of horizontal steel plate, and welds vertical stiffener or banded steel plate in the both sides of Wavelike steel webplate (1).
CN 201220298283 2012-06-25 2012-06-25 Corrugated steel web type pre-tensioned prestressed concrete I-type beam Expired - Lifetime CN202610695U (en)

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Application Number Priority Date Filing Date Title
CN 201220298283 CN202610695U (en) 2012-06-25 2012-06-25 Corrugated steel web type pre-tensioned prestressed concrete I-type beam

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Application Number Priority Date Filing Date Title
CN 201220298283 CN202610695U (en) 2012-06-25 2012-06-25 Corrugated steel web type pre-tensioned prestressed concrete I-type beam

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104594183A (en) * 2014-12-17 2015-05-06 邢台路桥建设总公司 Assembling type reinforced concrete T-shaped beam
CN110331650A (en) * 2019-07-03 2019-10-15 中铁大桥勘测设计院集团有限公司 A kind of dual-purpose Prestressed Continuous steel truss composite girder of public affairs rail and its construction method
CN110524675A (en) * 2019-08-20 2019-12-03 保利长大工程有限公司 A kind of pre-tensioning system precast H-beam and its construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104594183A (en) * 2014-12-17 2015-05-06 邢台路桥建设总公司 Assembling type reinforced concrete T-shaped beam
CN110331650A (en) * 2019-07-03 2019-10-15 中铁大桥勘测设计院集团有限公司 A kind of dual-purpose Prestressed Continuous steel truss composite girder of public affairs rail and its construction method
CN110331650B (en) * 2019-07-03 2021-05-04 中铁大桥勘测设计院集团有限公司 Public-rail dual-purpose prestressed continuous steel truss combination beam and construction method thereof
CN110524675A (en) * 2019-08-20 2019-12-03 保利长大工程有限公司 A kind of pre-tensioning system precast H-beam and its construction method

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C14 Grant of patent or utility model
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C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: Longhai Road 450052 Henan city of Zhengzhou province No. 70

Patentee after: HENAN PROVINCIAL COMMUNICATIONS PLANNING & DESIGN INSTITUTE Co.,Ltd.

Address before: Longhai Road 450052 Henan city of Zhengzhou province No. 70

Patentee before: HENAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST Co.,Ltd.

CX01 Expiry of patent term

Granted publication date: 20121219

CX01 Expiry of patent term