CN208346656U - A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning - Google Patents
A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning Download PDFInfo
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- CN208346656U CN208346656U CN201820988704.8U CN201820988704U CN208346656U CN 208346656 U CN208346656 U CN 208346656U CN 201820988704 U CN201820988704 U CN 201820988704U CN 208346656 U CN208346656 U CN 208346656U
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Abstract
The utility model provides a kind of hanging basket for the construction of bridge coping prestress wire two times tensioning, including a platform bracket, and platform bracket bottom is equipped with two bearing bars, installs two electric blocks respectively in platform bracket top surface two sides；On bridge floor above two bent caps of bridge between the opposite two sides of two width box beams, set up two platform sunpenders, the both ends of every platform sunpender hang a fixed pulley respectively, and the traction rope of each electric block is fixedly connected after a fixed pulley excessively respectively with bearing bar one end of mesa base on platform bracket.When the utility model carries out bent cap prestress wire two times tensioning, it is not take up hoisting machinery, without setting up bracket, saves construction cost, and enough construction spaces can be provided to guarantee construction safety.
Description
Technical field
The utility model belongs to bridge construction field, is a kind of fusion steel pipe support platform, door shaped stent platform
Hanging basket for the construction of bent cap prestress wire two times tensioning.
Background technique
As urban road congestion controls the occupancy in soil and farmland, city and surrounding city ring to make full use of space
Line large size elevated bridge generally occurs, and due to surging for the volume of traffic, former Four-Lane Road road surface has been unsatisfactory for transport need, creates ring
Line overpass is mostly six-lane or eight lane double width structures.With generally answering for high-strength concrete and high-strength underrelaxation steel strand wires
With from bridge construction material, mitigation bridge self weight is saved, structure connects load assignment, transmitting etc. and considers pier top bent cap
It is designed as pre-stressed concrete coping.In order to avoid because making bent cap tensile region section occur cracking or antiarch value after single tension
Phenomenon, design carry out tensioning, single tension symmetrical tensioning partial prestressing after bent cap concrete strength reaches 100% in two times
Steel beam removes the support systems such as bent cap bed die and bracket, carries out two times tensioning again after having lifted precast beam, and symmetrical tensioning is remaining
Steel strand wires.
Bed die and operation platform when first time tensioning can be by Coping Construction are operated, because of mould material turnover and frame
The factors such as beam space is limited, all remove the support systems such as bent cap bed die and bracket after bent cap first time tensioning is complete.Second
The secondary current common practice of tensioning is that jack is being hung to tension steel strand with small tonnage hoisting machinery between two width bridges under bridge
In same height, door shaped stent or steel pipe frame are set up between two bent cap stretching ends as operation platform, operator is in bracket
On by jack pass through steel strand wires carry out stretching construction.Because space under bridge limits, door shaped stent or the steel pipe frame construction set up are flat
The area and bearing capacity of platform are limited, and tensioning equipment cannot be placed on thereon, and in the construction process, hoisting machinery always cannot be from
It opens, occupies for a long time mechanical；Scaffold building not only consumes human and material resources, but also the used time longer also lacks safety guarantee.
Summary of the invention
The purpose of this utility model is that for the current bridge construction construction girder pre-stressed steel strand wires two times tensioning mistake of middle cover
Bracket sets up the problems such as difficult, safety guarantee is not easy, construction cost is high, occupancy is mechanical for a long time in journey, provides a kind of operation letter
Single, easy for construction bent cap prestress wire two times tensioning hanging basket.
The technical solution of the utility model is as follows:
A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning, it is characterised in that: rectangular including one
The platform bracket of shape, the platform bracket bottom is transversely provided with two bearing bars being parallel to each other along platform, on platform bracket top
Face two sides are installed by two electric blocks respectively；On bridge floor above two bent caps of bridge between the opposite two sides of two width box beams,
Two platform sunpenders being parallel to each other are set up, the equivalent width of the spacing between two platform sunpenders and the platform bracket, every
The both ends of platform sunpender hang a fixed pulley respectively, and the traction rope of each electric block is fixed sliding around crossing one respectively on platform bracket
It is fixedly connected after wheel with bearing bar one end of platform bracket bottom.
Further, the above-mentioned hanging basket for the construction of bridge coping prestress wire two times tensioning, in the week of platform bracket
It encloses and is additionally provided with guardrail.
Further, the above-mentioned hanging basket for the construction of bridge coping prestress wire two times tensioning, in two box beam top surfaces position
Divide in one between two platform sunpenders and hangs a chain block on strap bolt respectively, the chain lower end difference of two chain blocks
It is fixedly connected with the platform bracket bottom.
The utility model production is simple, and Master Cost is low, and turnover rate is high, transport it is easy to use, using the utility model into
The construction of row bridge coping prestress wire two times tensioning, compares door shaped stent or steel pipe frame operation platform, can be less with one
Hoisting machinery, also avoid bracket set up, remove, the time of base treatment and cost, while not influencing sidewalk vehicle under bridge also
It is current, construction cost can be saved, construction efficiency is improved, accelerates construction progress and shortens the construction time.The utility model firm stable,
There is sufficiently large working space, effective guarantee can be played to safe construction.
Detailed description of the invention
Fig. 1 is the side structure schematic view of the utility model direction across bridge.
Specific embodiment
As shown in Figure 1, a kind of hanging basket for the construction of bridge coping prestress wire two times tensioning, including a rectangle
Platform bracket 1,1 bottom of platform bracket is transversely provided with two bearing bars being parallel to each other 2 along platform, on platform bracket top
Face two sides are installed by two electric blocks 3 respectively；Bridge floor above two bent caps 4 of bridge between the opposite two sides of two width box beams 5
On, two platform sunpenders 6 being parallel to each other are set up, the equivalent width of the spacing between two platform sunpenders 6 and the platform bracket,
The both ends of every platform sunpender 6 hang a fixed pulley 7 respectively, and the traction rope 31 of each electric block 3 is around respectively on platform bracket
It is fixedly connected after crossing a fixed pulley 7 with described 2 one end of bearing bar.
To guarantee that guardrail 8 can be arranged in construction safety, the utility model around platform bracket 1.
In the utility model specific implementation process, to guarantee construction safety, can also set up defences the insurance system that falls.Fall arrest is protected
Dangerous system mainly includes two chain blocks 9.Two chain blocks 9 be suspended on respectively two box beams, 5 top surface be located at two platform sunpenders it
Between one in divide on strap bolt 10,91 lower end of chain of two chain blocks 9 respectively with 1 bottom of platform bracket is fixed connects
It connects.
It is further to the structure and application mode of the utility model below by way of the Application Example an of the utility model
Explanation.The overpass bridge constructed in this application embodiment is double width bridge, and superstructure uses prefabricated PC concrete
Small box girder, Cast-in-Situ Continuous Beam, steel box girder, substructure use twin columns prestressed concrete cover beam, and each pier stud divides into cushion cap
Connect 2 1.5m pile foundations.Standard paragraphs bridge floor is 16.0 meters wide, bent cap length be 14.4 meters, width be 2.0 meters, a height of 1.8 meters, each lid
Beam has 5 beam N1 and 5 beam N2 steel strand wires, and left and right width bent cap end spacing is 3.6 meters.Box beam lifting erection construction is completed above bent cap
Afterwards, two times tensioning construction is carried out.
Two times tensioning is constructed using the utility model.The platform bracket of the utility model is 5.0 meters long, wide 2.5 meters of works
For operation platform, platform skeleton is made of longitudinal at least 4 48 steel pipes of Φ, lateral more 28 screw-thread steels of Φ, and platform top surface is laid with
Anti-skidding plank, platform base transversely set two I14 I-steel as bearing bar, and 1.2 meters of high guardrails are arranged in platform periphery.Platform
4 0.5 ton of minisize electric hoists of upper fixed installation, as platform lifting system.
Platform needs between the pier stud below two bent caps of tensioning in back court processing and fabricating, operating to construction site.
It is controlled above bent cap between prefabricated top surface of the beam and sets up 2 32 fining twisted steels of Φ as platform sunpender.Every
The both ends of sunpender pass through one fixed pulley of steel wire hang.The traction rope of each electric block bypasses certain pulley respectively on platform
Afterwards, it is fixedly connected with bearing bar one end of mesa base.
In Bridge Design, the gap between two width bridges is median strip, general in the opposite two sides top surface of prefabricated case beam
It is all preset in more and divides strap bolt.The utility model divides on strap bolt between two platform sunpenders, passes through steel wire
Rope hangs one 10 tons of chain blocks as fall arrest insurance system respectively, and the chain of two chain blocks hangs down into platform bracket respectively
On, and be fixedly connected with platform bracket bottom surface.
When carrying out two times tensioning construction, the tensioning equipments such as stretch-draw jack 11 are transported on platform 1.Start 4 electronic calabashes
Reed 3 after platform is promoted 50cm, tenses two chain blocks 9 of fall arrest insurance system, after so that chain block is played a role,
Platform is continued to lift up, it is synchronous to tense chain block, platform is promoted to after the height for needing tensioning, electric block is lockked in power-off,
Two chain blocks are locked simultaneously, and in two bent caps, 4 end, installation stretch-draw jack 11 carries out two times tensioning construction operation.
Claims (3)
1. a kind of hanging basket for the construction of bridge coping prestress wire two times tensioning, it is characterised in that: including a rectangle
Platform bracket, the platform bracket bottom is transversely provided with two bearing bars being parallel to each other along platform, in platform bracket top surface
Two sides are installed by two electric blocks respectively；On bridge floor above two bent caps of bridge between the opposite two sides of two width box beams, take
If two platform sunpenders being parallel to each other, the equivalent width of spacing and the platform bracket between two platform sunpenders, every flat
The both ends of platform sunpender hang a fixed pulley respectively, and the traction rope of each electric block is around a fixed pulley excessively respectively on platform bracket
It is fixedly connected afterwards with bearing bar one end of platform bracket bottom.
2. the hanging basket according to claim 1 for the construction of bridge coping prestress wire two times tensioning, feature exist
In: guardrail is equipped with around the platform bracket.
3. the hanging basket according to claim 1 for the construction of bridge coping prestress wire two times tensioning, feature exist
In: divide in one between two platform sunpenders in two box beam top surfaces and hang a chain block on strap bolt respectively, two pull
The chain lower end of cucurbit is fixedly connected with the platform bracket bottom respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820988704.8U CN208346656U (en) | 2018-06-25 | 2018-06-25 | A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820988704.8U CN208346656U (en) | 2018-06-25 | 2018-06-25 | A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208346656U true CN208346656U (en) | 2019-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820988704.8U Active CN208346656U (en) | 2018-06-25 | 2018-06-25 | A kind of hanging basket for the construction of bridge coping prestress wire two times tensioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208346656U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067201A (en) * | 2019-03-15 | 2019-07-30 | 上海建工七建集团有限公司 | A kind of movable type tensioning platform and its application method |
| CN112030749A (en) * | 2020-07-15 | 2020-12-04 | 中交第一航务工程局有限公司 | Construction method of walking type bent cap operation platform |
| CN112726409A (en) * | 2020-12-29 | 2021-04-30 | 中铁一局集团有限公司 | Hoisting device for bridge water surface pile tie beam and construction method thereof |
-
2018
- 2018-06-25 CN CN201820988704.8U patent/CN208346656U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067201A (en) * | 2019-03-15 | 2019-07-30 | 上海建工七建集团有限公司 | A kind of movable type tensioning platform and its application method |
| CN112030749A (en) * | 2020-07-15 | 2020-12-04 | 中交第一航务工程局有限公司 | Construction method of walking type bent cap operation platform |
| CN112726409A (en) * | 2020-12-29 | 2021-04-30 | 中铁一局集团有限公司 | Hoisting device for bridge water surface pile tie beam and construction method thereof |
| CN112726409B (en) * | 2020-12-29 | 2022-11-01 | 中铁一局集团有限公司 | Hoisting device for bridge water surface pile tie beam and construction method thereof |
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