CN205205676U - Portable beiLei beam operation platform of cast -in -situ box girder - Google Patents

Portable beiLei beam operation platform of cast -in -situ box girder Download PDF

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Publication number
CN205205676U
CN205205676U CN201520955819.3U CN201520955819U CN205205676U CN 205205676 U CN205205676 U CN 205205676U CN 201520955819 U CN201520955819 U CN 201520955819U CN 205205676 U CN205205676 U CN 205205676U
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bailey
pier stud
straddle truck
bracket
girder
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CN201520955819.3U
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仵军胜
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Sichuan Communications Construction Group Co.,Ltd.
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Sichuan Jiaotou Construction Engineering Co Ltd
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Abstract

The utility model relates to a portable beiLei beam operation platform of cast -in -situ box girder mainly includes beiLei beam, portal crane, pier stud, pier stud bracket and prestressing force connection anchor rope, and beiLei beam is assembled by bailey piece and is formed, through shellfish thunder pin junction between the adjacent bailey piece, connects into whole through rotating steel purlin piece behind the many beiLei beam parallel placements, and installs prestressing force and connect the anchor rope between beiLei beam, the portal crane comprises portal crane girder and portal crane support, and the portal crane girder is also assembled by bailey piece and is formed, is provided with the beiLei beam reinforcement between some bailey piece, and the portal crane girder is installed on the support, and the portal crane support sets up in the pier stud top, is provided with the beiLei beam bracket at the pier shaft simultaneously. The utility model discloses a shellfish thunder girder can adopt the mode of pulling walking, compare with self -propelled moving die carrier method or bridge construction machine have with the steel volume little, once only drop into advantages such as little, that the construction is simple and convenient, the economic technology benefit is showing.

Description

The portable Bailey beam operating platform of cast-in-situ box girder
Technical field
The utility model relates to the portable Bailey beam operating platform of a kind of cast-in-situ box girder.Belong to bridge engineering field, be applicable to the installing engineering of Bailey beam operating platform in construction of cast-in-situ box-beam, be particularly useful for terrain precipitous, across the portable Bailey beam operating platform construction in the complicated landform in mountain area such as ditch cross a river, the adjacent pier discrepancy in elevation are large.
Background technology
Cast-in-situ prestressed concrete continuous box girder has that structural integrity is good, rigidity is large, good looking appearance, adaptable engineering characteristic, the normal a kind of form of structure adopted in expressway bridge engineering, its construction method is mainly based on mobile formwork and raft support method at present, and two kinds of methods respectively have pluses and minuses.
MSS method has short construction period, operation convenience, automaticity advantages of higher, but also exist on-the-spot peace tear open the cycle long, costly, the shortcoming such as component volume is large, traffic condition requirement is high, equipment use frequency is low, maintenance expense is high, only could show its technology economy advantage in the application of multispan box girder construction; Conventional raft support method is mainly applicable to the area that physical features is smooth, topographical elevation difference little, bridge design height is lower and the adjacent pier discrepancy in elevation is less, there is the features such as scantling is small and exquisite, the number of turnover is many, the turnaround time is short, use auxiliary equipment is few, technical maturity, but MODEL OVER COMPLEX TOPOGRAPHY lower carriage system foundation treatment engineering amount is large, long construction period, environmental disruption is serious, be unfavorable for the differential settlement controlling support ground, and then affect the construction quality of cast-in-situ box girder.
Therefore, in the cast-in-situ box girder design and construction of the complicated landform bridge on highway in mountain area, because terrain is precipitous, across ditch cross a river, the adjacent pier discrepancy in elevation greatly, often directly cannot apply mechanically above-mentioned two kinds of conventional construction methods in Practical Project.Given this, need a kind of shellfish thunder girder of invention at present badly and pulling mode can be adopted to walk, meet the construction demand of cast-in-situ box girder high-block bridge high headroom, simultaneously the portable Bailey beam operating platform of easy and simple to handle, that efficiency of construction is high cast-in-situ box girder.The utility model utilizes beret truss assembled straddle truck on pier stud in advance, hoist engine is coordinated longitudinally to be advanced piecemeal the Bailey beam front end after disconnection by straddle truck, utilize crane to transfer beret truss carries out assembled simultaneously in rear end, one joint assembled complete after continue reach, complete until assembled, realize the transfer of Bailey beam, there is good economic technology benefit.
Summary of the invention
The purpose of this utility model is to provide a kind of shellfish thunder girder that pulling mode can be adopted to walk, and meets the construction demand of cast-in-situ box girder high-block bridge high headroom, simultaneously the portable Bailey beam operating platform of easy and simple to handle, that efficiency of construction is high cast-in-situ box girder.
For realizing above-mentioned technical purpose, the utility model have employed following technical scheme:
The portable Bailey beam operating platform of a kind of cast-in-situ box girder, mainly comprise Bailey beam, straddle truck, pier stud, pier stud bracket and prestressing force and connect anchor cable, Bailey beam is assembled by beret truss, connected by shellfish thunder pin between adjacent beret truss, the many parallel placements of Bailey beam connect into entirety by rotating steel purlin sheet afterwards, and between Bailey beam, be provided with prestressing force connection anchor cable; Straddle truck is made up of straddle truck girder and straddle truck support, straddle truck girder is also assembled by beret truss, is provided with Bailey beam girth member between part beret truss, and straddle truck erection of main beam is on support, straddle truck Bracket setting, in pier stud top, is provided with Bailey beam bracket at pier shaft simultaneously.
Further, described Bailey beam girth member is vertically arranged in the Bailey beam above straddle truck support, and often organize Bailey beam girth member and be made up of 4 block plates, symmetry is anchored in the beret truss both sides in Bailey beam.
Described prestressing force connects the anchor cable preformed hole be horizontally through in each Bailey beam and is anchored in Bailey beam both sides, every root Bailey beam preformed hole place is provided with anchor structure, prestressing force connects anchor cable along beret truss lapping direction spaced set, often organizes prestressing force connection anchor cable and is symmetrical set.
Described straddle truck cradle top is provided with semicircle steel pipe support node, and adopts movable bolt to be connected with straddle truck girder; Built-in fitting anchor connection in straddle truck frame bottom and pier stud, and straddle truck frame bottom both sides are provided with spacing steel plate, spacing steel plate be provided with triangle diagonal brace and with the anchor connection of pier stud built-in fitting.
Described semicircle steel pipe support node comprises outside semicircle steel pipe and the cement mortar of inside, and semicircle steel pipe and straddle truck cradle top shaped steel are welded to connect.
Described pier stud is reinforced concrete structure.
Described pier stud bracket is arranged in the middle part of pier stud, and pier stud bracket bottom is provided with bracket support bar and bracket lateral connection bar, adopts bolt-weld joint between bracket support bar and bracket lateral connection bar, wherein bracket support bar and the anchor connection of pier stud built-in fitting.
The construction method of the portable Bailey beam operating platform of described cast-in-situ box girder, its main construction sequence is as follows:
1) built-in fitting construction: pier shaft adopt reinforced concrete structure, during assembling reinforcement according to design drawing at the pre-buried connecting screw rod in pier stud top and spacing steel plate, at the pre-buried supporting bar connector of pier shaft, then formwork builds pier body;
2) straddle truck is assembled: with the assembled straddle truck of beret truss on pier stud, the fining twisted steel of straddle truck diameter 32mm is anchored on pier stud built-in fitting;
3) pier stud bracket is installed: during construction, first by bracket support bar and the anchoring of pier shaft built-in fitting, then installation bracket lateral connection bar, finally installs pier stud bracket, adopts bolt-weld joint between bracket support bar and bracket lateral connection bar;
4) Bailey beam is assembled: first assembled one group of front launching nose, the rear Bailey beam according to design drawing, beret truss being connected into certain length by Bei Leixiao, then is assembled into entirety by organizing Bailey beam by steel purlin sheet and prestressing force connection anchor cable more;
5) vertical shift nose girder: assembled complete after vertically move with hoist engine, make nose girder front end arrive straddle truck position on pier stud;
6) split Bailey beam: be suspended to above pier stud straddle truck by nose girder leading portion with Chain block after Bailey beam vertical shift puts in place, and support place shellfish thunder pin is removed, Bailey beam is disconnected from here, re-uses crane and front-axle beam is lifted by crane and falls to above abutment Temporary Piers;
7) the assembled method of beam body pushing tow advances: adopt pushing tow assembling method after beam body falls into position, first with hoist engine, beam body is moved forward a segment distance, then transfers beret truss with crane and carry out assembled, a joint is assembled complete after continue reach, complete until assembled;
8) adjust Bailey beam position: the plan-position of Bailey beam is adjusted in the assembled end of beam body afterwards with hoist engine and Chain block, make jack application point be the best stress point of Bailey beam;
9) Bailey beam lower support frame is installed: after the adjustment of Bailey beam position, install bracing frame, and carry out montant stretch-draw in Bailey beam bottom.
The utility model has following feature and beneficial effect:
(1) the Bailey beam mobile working platform that the utility model relates to is done to form primarily of beret truss, beret truss assembled straddle truck on pier stud is utilized in advance during construction, by straddle truck and in conjunction with the assembled method of pushing tow realize Bailey beam longitudinal direction advance, meet the construction demand of mountain area multispan cast-in-situ box girder high-block bridge high headroom completely, and whole working platform is assembled, dismantle and transport very easy, without the need to main equipment, operating efficiency is high.
(2) the utility model by arranging buffer component between straddle truck support and straddle truck girder, effectively avoids straddle truck when operation, cause because girder trussed construction unbalance stress there is inclination angle the potential safety hazard that edge, support portion pressurized seriously causes; In straddle truck girder, Bailey beam reinforcement assembly is installed simultaneously, effectively improves the bonding strength of girder, strengthen the operational security of straddle truck.
(3) the utility model is on the basis adopting steel purlin sheet to connect based on traditional two adjacent groups Bailey beam, set up prestressing force and connect anchor cable structure, anchor cable laterally runs through often organizes Bailey beam, and in the clamping of each beret truss both sides, thus the bonding strength improved between adjacent Bailey beam, strengthen the resistance to overturning of Bailey beam.
Accompanying drawing explanation
Fig. 1 is the utility model cast-in-situ box girder portable Bailey beam operating platform pier stud straddle truck structural representation;
Fig. 2 is semicircle steel pipe support node schematic diagram in the utility model;
Fig. 3 is many group Bailey beam lateral connection schematic diagrames in the utility model;
Fig. 4 is the main construction sequence of the portable Bailey beam operating platform of cast-in-situ box girder.
In figure: 1-Bailey beam girth member, 2-straddle truck girder, 3-shellfish thunder pin, 4-straddle truck support, the spacing steel plate of 5-, 6-pre embedded bolt, 7-pier stud, 8-bracket lateral connection bar, 9-pier stud bracket, 10-bracket support bar, 11-cradle top steel beam column, 12-anchorage screw, 13-nut, 14-cement mortar, the semicircle steel pipe of 15-, 16-steel purlin sheet, 17-prestressing force connects anchor cable, 18-anchoring piece, 19-transversely strengthening shaped steel frame.
Detailed description of the invention
The manufacturing technique requirent of Bailey beam and Bei Leixiao in present embodiment, prestressing force connects anchorage cable stretching construction technical requirement, the construction process requirement etc. that performance of concrete column confined is built repeats no more, and emphasis sets forth the embodiment of the portable Bailey beam operating platform construction of the cast-in-situ box girder related to of the present utility model.
Fig. 1 is the utility model cast-in-situ box girder portable Bailey beam operating platform pier stud straddle truck structural representation, and Fig. 2 is semicircle steel pipe support node schematic diagram in the utility model, and Fig. 3 is many group Bailey beam lateral connection schematic diagrames in the utility model.With reference to the portable Bailey beam operating platform of the cast-in-situ box girder shown in Fig. 1 pier stud straddle truck structure, primarily of compositions such as Bailey beam, straddle truck, pier stud 7, pier stud brackets 9.
Pier stud 7 is cast-in-place concrete structure, and after pier shaft reinforcing bar binding, at pier stud top construction pre embedded bolt 6 and spacing steel plate 5, wherein pre embedded bolt 6 diameter is 18mm, and the grade of spacing steel plate the last 5 is Q345; Simultaneously at the connector of pier shaft pre-buried pier stud bracket support bar 10, formwork after completing, placing intensity grade is the concrete of C40, and maintenance is shaping.
During construction, in advance on pier stud 7 with the assembled straddle truck girder 2 of 321 type beret truss, straddle truck girder is welded with Bailey beam girth member 1, and Bailey beam girth member 1 adopts strong grade to be that the steel plate of Q345 is made; Straddle truck support 4 adopts the fining twisted steel of diameter 32mm to be anchored at pier stud 7 top, be connected with spacing steel plate 5 temporary weld, and be the semicircle steel pipe 15 of 100mm at straddle truck support 4 welded top diameter, inner cement injection mortar 14, form buffer component, semicircle steel pipe 15 both sides install anchorage screw 12 additional, are connected with straddle truck girder 2 bottom steel beam column; Subsequently by bracket support bar 10 and the anchoring of pier shaft built-in fitting, then installation bracket lateral connection bar 8 and pier stud bracket 9 successively.
During Bailey beam assembling, first assembled one group of front launching nose in tunnel, utilizes beret truss and the identical Bailey beam of the assembled 4 groups of specifications of shellfish thunder pin 3 subsequently, and four groups of Bailey beams (except nose girder) is assembled into entirety by rotating steel purlin sheet 16.4 groups of Bailey beams longitudinally arrange prestressing force and connect anchor cable 17 and transversely strengthening shaped steel frame 19, wherein prestressing force connects anchor cable 17 diameter is 15mm, the preformed hole (diameter 16mm) be horizontally through during installation in each Bailey beam is anchored in Bailey beam both sides, often organize prestressing force connection anchor cable to be symmetrical set, whole Bailey beam arranges one group every 3000mm.
Assembled complete after vertically move with hoist engine, make nose girder front end arrive straddle truck girder 2 position, then with Chain block, nose girder leading portion to be suspended to above straddle truck girder 2, and by counterweight beam jack upwards jacking, to reduce the moment of flexure of abutment supporting place beam.Subsequently support place shellfish thunder pin 3 is removed, Bailey beam is disconnected from here, re-use crane front-axle beam is lifted by crane and falls to above abutment Temporary Piers, pushing tow assembling method is adopted after beam body falls into position, first with hoist engine, beam body is moved forward 3m, transferring beret truss with crane again carries out assembled, one joint assembled complete after continue reach 3m assembled, complete until assembled.
The plan-position of Bailey beam is adjusted in the assembled end of beam body afterwards with hoist engine and Chain block, make jack application point be the best stress point of Bailey beam, finally carry out the follow-up works such as montant stretch-draw.
Fig. 4 is the main construction sequence of the portable Bailey beam operating platform of cast-in-situ box girder.With reference to shown in Fig. 4, the main construction sequence of the portable Bailey beam operating platform of cast-in-situ box girder is as follows:
1) built-in fitting construction: pier shaft adopt reinforced concrete structure, during assembling reinforcement according to design drawing at the pre-buried connecting screw rod in pier stud 7 top 6 and spacing steel plate 5, at the pre-buried supporting bar connector of pier shaft, then formwork builds pier body.
2) straddle truck is assembled: with the assembled straddle truck of beret truss on pier stud 7, the fining twisted steel of straddle truck diameter 32mm is anchored on pier stud built-in fitting.
3) pier stud bracket is installed: during construction, first by bracket support bar 10 and the anchoring of pier shaft built-in fitting, then installation bracket lateral connection bar 8, finally pier stud bracket 9 is installed, between each rod member, adopts bolt-weld joint.
4) Bailey beam is assembled: first assembled one group of front launching nose, the rear Bailey beam according to design drawing, beret truss being connected into certain length by Bei Leixiao, then will organize Bailey beam (except nose girder) more and connect anchor cable 17 by steel purlin sheet and prestressing force and be assembled into entirety.
5) vertical shift guide beam: assembled complete after vertically move with hoist engine, make nose girder front end arrive straddle truck girder 2 position on pier stud.
6) Bailey beam is split: be suspended to above pier stud straddle truck by nose girder leading portion with Chain block after Bailey beam vertical shift puts in place, and removed by support place shellfish thunder pin 3, Bailey beam is disconnected from here, re-use crane and lifted by crane by front-axle beam and fall to above abutment Temporary Piers.
7) the assembled method of beam body pushing tow advances: adopt pushing tow assembling method after beam body falls into position, first with hoist engine, beam body is moved forward 3m, then transfers beret truss with crane and carry out assembled, a joint is assembled complete after to continue reach 3m assembled, complete until assembled.
8) adjust Bailey beam position: the plan-position of Bailey beam is adjusted in the assembled end of beam body afterwards with hoist engine and Chain block, make jack application point be the best stress point of Bailey beam.
9) Bailey beam lower support frame is installed: after the adjustment of Bailey beam position, install bracing frame, and carry out the follow-up works such as montant stretch-draw in Bailey beam bottom.

Claims (7)

1. the portable Bailey beam operating platform of cast-in-situ box girder, mainly comprise Bailey beam, straddle truck, pier stud, pier stud bracket and prestressing force and connect anchor cable, Bailey beam is assembled by beret truss, connected by shellfish thunder pin between adjacent beret truss, the many parallel placements of Bailey beam connect into entirety by rotating steel purlin sheet afterwards, and between Bailey beam, be provided with prestressing force connection anchor cable; Straddle truck is made up of straddle truck girder and straddle truck support, straddle truck girder is also assembled by beret truss, is provided with Bailey beam girth member between part beret truss, and straddle truck erection of main beam is on support, straddle truck Bracket setting, in pier stud top, is provided with Bailey beam bracket at pier shaft simultaneously.
2. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 1, it is characterized in that described Bailey beam girth member is vertically arranged in the Bailey beam above straddle truck support, often organize Bailey beam girth member to be made up of 4 block plates, symmetry is anchored in the beret truss both sides in Bailey beam.
3. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 1, it is characterized in that described prestressing force connects the anchor cable preformed hole be horizontally through in each Bailey beam and is anchored in Bailey beam both sides, every root Bailey beam preformed hole place is provided with anchor structure, prestressing force connects anchor cable along beret truss lapping direction spaced set, often organizes prestressing force connection anchor cable and is symmetrical set.
4. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 1, is characterized in that described straddle truck cradle top is provided with semicircle steel pipe support node, and adopts movable bolt to be connected with straddle truck girder; Built-in fitting anchor connection in straddle truck frame bottom and pier stud, is provided with spacing steel plate in straddle truck frame bottom both sides, spacing steel plate be provided with triangle diagonal brace and with the anchor connection of pier stud built-in fitting.
5. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 4, it is characterized in that described semicircle steel pipe support node comprises outside semicircle steel pipe and the cement mortar of inside, semicircle steel pipe and straddle truck cradle top shaped steel are welded to connect.
6. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 1, is characterized in that described pier stud is reinforced concrete structure.
7. the portable Bailey beam operating platform of cast-in-situ box girder according to claim 1, it is characterized in that described pier stud bracket is arranged in the middle part of pier stud, pier stud bracket bottom is provided with bracket support bar and bracket lateral connection bar, bolt-weld joint is adopted, wherein bracket support bar and the anchor connection of pier stud built-in fitting between bracket support bar and bracket lateral connection bar.
CN201520955819.3U 2015-11-25 2015-11-25 Portable beiLei beam operation platform of cast -in -situ box girder Active CN205205676U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108103965A (en) * 2018-01-12 2018-06-01 长沙理工大学 It is a kind of to reinforce with prestressing force Bailey beam and its construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108103965A (en) * 2018-01-12 2018-06-01 长沙理工大学 It is a kind of to reinforce with prestressing force Bailey beam and its construction method
CN108103965B (en) * 2018-01-12 2019-04-09 长沙理工大学 A kind of reinforce uses prestressing force Bailey beam and its construction method

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Address after: 610041 area a, 8th floor, No.90, West 1st section of 2nd Ring Road, Chengdu, Sichuan

Patentee after: Sichuan Communications Construction Group Co.,Ltd.

Address before: 610041 area a, 8th floor, No.90, West 1st section of 2nd Ring Road, Chengdu, Sichuan

Patentee before: SICHUAN JIAOTOU CONSTRUCTION ENGINEERING Co.,Ltd.