CN107524087A - A kind of prefabricated box girder hoisting construction technology - Google Patents
A kind of prefabricated box girder hoisting construction technology Download PDFInfo
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- CN107524087A CN107524087A CN201710736642.1A CN201710736642A CN107524087A CN 107524087 A CN107524087 A CN 107524087A CN 201710736642 A CN201710736642 A CN 201710736642A CN 107524087 A CN107524087 A CN 107524087A
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- Prior art keywords
- case beam
- prefabricated case
- prefabricated
- bent cap
- hoist
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
A kind of prefabricated box girder hoisting construction technology, comprises the following steps：Step 1: during prefabrication of beam, hole for hoist is reserved；Step 2: prefabricated case beam is transported in spanning section to be installed, tied up with main rope, secondary steel wire rope and the beam body rear end at purlin Chinese herbaceous peony end are tied up；Step 3: the horizontal lifting of prefabricated case beam is arrived at 25~35cm below bent cap, and ensure the front end level of prefabricated case beam to apart from bent cap >=20cm；Step 4：Prefabricated case beam front bottom end is set to be higher than bent cap about 40cm~70cm, and mobile prefabricated case beam is until the rear end of prefabricated case beam is left below bent cap；Step 5：Raising prefabricated case beam rear end, it is horizontal for adjustment prefabricated case beam beam-ends high official post, and starting vertical shift purlin car will move after prefabricated case beam, in place and fall beam installation.The secondary steel wire rope at purlin Chinese herbaceous peony end and beam body rear end are tied up, so when beam body is in heeling condition, the problem of purlin car rear end main rope load is excessive is advantageously reduced, so as to reduce potential safety hazard.
Description
Technical field
The present invention relates to field of bridge construction, more particularly to a kind of prefabricated box girder hoisting construction technology.
Background technology
Prefabricated case beam is generally used among bridge, and prefabricated case beam is exactly to first pass through pre-tensioning system or post stretching to deformed bar
Carry out tensioning and the prior prefabricated flexural member formed, then transport to job site and installed.
And in the prior art, during prefabricated case beam is installed, it is common that lifted by purlin car, and this
During, because prefabricated case beam needs the process by an inclination movement, and during this with the relatively low one end of prefabricated case beam
Often load is excessive for the main rope tied up, so as to bury potential safety hazard.
The content of the invention
It is an object of the invention to provide a kind of prefabricated box girder hoisting construction technology, this not only reduces potential safety hazard, together
When can also improve positioning and fall the accuracy of beam, so as to be advantageous to improve efficiency of construction and quality.
The present invention above-mentioned purpose technical scheme is that：A kind of prefabricated box girder hoisting construction work
Skill, comprise the following steps：
When S1, prefabrication of beam, the both sides of beam body must reserve hole for hoist in the beam-ends of distance two about 3.5~4.5m positions；
S2, using beam car prefabricated case beam is transported in spanning section to be installed, by the main rope at purlin car both ends through hanging
Hole is filled, and is tied up, meanwhile, the secondary steel wire rope positioned at purlin Chinese herbaceous peony end, tied up with the hole for hoist of beam body rear end, and keep loose
Shape, make prefabricated case beam front end level to apart from bent cap about 18~22cm；
S3, prefabricated case beam level is lifted using trolley hoist engine and arrived at 25~35cm below bent cap, start vertical shift
Purlin car finely tunes prefabricated case beam in horizontal direction position, it is ensured that its front end level is to apart from bent cap >=20cm；
S4, start trolley hoist engine raising prefabricated case beam, its front bottom end is higher than bent cap about 40cm~70cm, start vertical
Purlin car is moved toward front leg strut direction movement prefabricated case beam until bent cap lower section, now, purlin Chinese herbaceous peony end are left in the rear end of prefabricated case beam
Secondary steel wire rope is then in tightening state；
S5, start trolley hoist engine raising prefabricated case beam rear end, it is horizontal for the high official post of adjustment prefabricated case beam beam-ends, starts vertical
Moving purlin car will move after prefabricated case beam, makes prefabricated case beam in place with bent cap and falls beam installation.
By using above-mentioned technical proposal, the hole for hoist of the secondary steel wire rope at purlin Chinese herbaceous peony end and beam body rear end is tied up, this
For sample when beam body is in heeling condition, secondary steel wire rope also can play tensioning function to beam body rear end, advantageously reduce purlin
The problem of car rear end main rope load is excessive, so as to reduce potential safety hazard.
Moreover, prefabricated case beam is first transported below bent cap, then lifted again, so can be first presetting on the ground
Whole good prefabricated case beam position, so as to avoid significantly being adjusted after rise, and then it is also beneficial to improve the efficiency of construction
And security.
Preferably, in S2 after main rope passes through hole for hoist, an anti-decylization can be also worn on main rope again, it is described anti-
The external diameter of decylization is more than the internal diameter of hole for hoist.
By using above-mentioned technical proposal, it on the one hand can so avoid the edge of hole for hoist larger to main rope generation
Pressure, and cause the damage of main rope, the inner surface of another aspect anti-decylization can rub with main rope, and
Anti-decylization can be embedded in hole for hoist, spun off so as to be advantageous to avoid main rope to occur loose from hole for hoist general
Rate.
Preferably, the anti-decylization is taper towards one end of hole for hoist, and is matched with the hole for hoist.
By using above-mentioned technical proposal, such anti-decylization can be easier to be embedded in hole for hoist, and can also drop
The probability that the edge of low hole for hoist is damaged.
Preferably, the anti-decylization is provided with the teeth towards ring heart away from hole for hoist one end.
By using above-mentioned technical scheme, teeth can block main rope, so also just can further reduce anti-
The probability of Relative sliding occurs with main rope for decylization.
Preferably, the side of bent cap is prefabricated with boss, and the boss is less than the upper surface of bent cap, in S5 before beam is fallen,
Jack is first placed on boss, and jack is risen the bottom of prefabricated case beam and abuts against, afterwards when trolley hoist engine
When decline, jack also can progressively decline.
By using above-mentioned technical proposal, so after prefabricated case beam is aligned with bent cap, jack can first support pre-
Box beam processed, so as to which the probability of prefabricated case beam occurred level direction skew during decline, can be reduced, and then also just improve
The efficiency of construction.
Preferably, template and framework of steel reinforcement are put up between boss and prefabricated case beam after beam completion is fallen in S5, and
The penetration concrete in template, its solidification is waited to form support block after drying.
By using above-mentioned technical proposal, the support block so poured can further connect bent cap and prefabricated case beam
Together, so as to strengthen the conjugation between bent cap and prefabricated case beam, so as to increase the intensity of bed rearrangement bridge.
Preferably, the end of jack is cambered surface, and jack end is also raised with one, and the bottom of prefabricated case beam
The groove to match provided with the end with jack, and the bottom of the groove carries the locating slot to match with projection.
By using above-mentioned technical proposal, the end of such jack and the bottom groove of prefabricated case beam can successfully match somebody with somebody
Together, so as to also just serve the effect of fast positioning.Moreover, raised settings can reduce the prefabricated case beam after positioning with
Relative sliding occurs between jack, reduces the frequency of resetting.
Preferably, the projection is arc.
By using above-mentioned technical proposal, groove and raised suffered resistance in the aligning process can be so reduced
Hinder, while can also avoid the probability to be shifted between bent cap and prefabricated case beam.
Preferably, the upper surface at the both ends of bent cap carries limited block in S3, the spacing of the limited block and prefabricated case beam
Width is equal, and the inside edge of the limited block is set into chamfering.
By using above-mentioned technical proposal, because the inside edge of limited block is into chamfering, so it is easier to make prefabricated case beam
Accurately positioned between bent cap, and effectively position-limiting action can be also played to prefabricated case beam, reduce follow-up peace
Unnecessary trouble during dress.
In summary, the invention has the advantages that：
1st, the rear end hole for hoist of the secondary steel wire rope and prefabricated case beam at purlin Chinese herbaceous peony end is tied up, so during inclined lift,
The problem of purlin car rear end main rope load can be avoided excessive；
2nd, during Luo Liang, the bottom of prefabricated case beam is first withstood using jack, so when prefabricated case beam and bent cap are aligned
After good, prefabricated case beam can be reduced and occur the problem of skew again；
3rd, the end of jack is cambered surface, and with the projection of an arc, and the bottom of prefabricated case beam carries and jack
The groove that matches of end, such jack can play positioning action to prefabricated case beam, and then be advantageous to improve precast box
The efficiency of construction of beam.
Brief description of the drawings
Fig. 1 is prefabricated box girder hoisting construction flow chart；
Fig. 2 is the schematic diagram that prefabricated case beam is placed in installing zone；
Fig. 3 is the schematic diagram of prefabricated case beam raising；
Fig. 4 is that prefabricated case beam leaves schematic diagram below bent cap；
Fig. 5 is the schematic diagram that prefabricated case beam positioning falls beam；
Fig. 6 is the structural representation of bent cap；
Fig. 7 is the schematic diagram of hole for hoist binder structure；
Fig. 8 is the schematic diagram that jack abuts prefabricated case beam；
Fig. 9 is the installation diagram of bent cap and prefabricated case beam.
In figure, 1, prefabricated case beam；11st, hole for hoist；12nd, groove；121st, locating slot；2nd, bent cap；21st, limited block；22nd, it is convex
Platform；23rd, support block；3rd, purlin car；31st, main rope；32nd, secondary steel wire rope；4th, anti-decylization；41st, teeth；5th, jack；51st, it is convex
Rise.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing 1.
A kind of prefabricated box girder hoisting construction technology, comprises the following steps：
Step 1：In prefabrication of beam, the both sides of prefabricated case beam 1 must be in the reserved lifting in the beam-ends of distance two about 3.5~4.5m positions
Hole 11, preferable position are 4m, and the hole side of each hole for hoist 11 is into chamfering and set.The wherein process of prefabrication of beam
For prior art, and it is nor the core content of the invention to be embodied, so no longer elaborating here.
Step 2：As shown in Figure 6, the prefabricated bent cap 2 on two parallel bridge piers, it is reserved above the both ends of bent cap 2 herein
Limited location block 21, and the inner side top edge of limited block 21 is into chamfering and set, and former and later two faces of bent cap 2 have reserved two
Individual boss 22, and four boss 22 are on two center line symmetrical settings on the horizontal plane direction of bent cap 2.Wherein, bent cap 2
Prefabrication process be also prior art, and itself nor the present invention the core content to be embodied, it is described no longer detailed here
It is thin to illustrate.
Step 3：As shown in accompanying drawing 2 and accompanying drawing 3, prefabricated case beam 1 is transported to spanning section to be installed using beam car
It is interior, i.e., between adjacent two bent cap 2, by the main rope 31 at the both ends of purlin car 3 through the corresponding hole for hoist 11 of prefabricated case beam 1, and
Tie up, meanwhile, the secondary steel wire rope 32 positioned at the front end of purlin car 3, tied up with the hole for hoist 11 of beam body rear end, and keep loose
Shape, make the front end level of prefabricated case beam 1 to apart from the about 18~22cm of bent cap 2, preferably 20cm.
And after main rope 31 passes through hole for hoist 11, an anti-decylization 4 can be also worn again on main rope 31.Prevent herein
Decylization 4 is taper towards the one end of hole for hoist 11, and the external diameter of anti-decylization 4 is more than the internal diameter of hole for hoist 11, and can be coordinated
It is embedded into hole for hoist 11.In addition, anti-decylization 4 deviates from teeth 41 of the one side with oriented ring heart of hole for hoist 11, and teeth 41 are carried on the back
Deviate from the direction of hole for hoist 11, main rope 31 and time steel wire rope 32 on the one hand can be reduced in such hoisting process directly with hanging
Dress hole 11 rubs, and teeth 41 can also avoid main rope 31 and time steel wire rope 32 from slipping hole for hoist 11 easily.
Step 4：As shown in Figure 3, the horizontal lifting of prefabricated case beam 1 is arrived under bent cap 2 using trolley hoist engine
At 25~35cm of side, preferably at 30cm, and start vertical shift purlin car 3 and finely tune prefabricated case beam 1 in horizontal direction position, it is ensured that before it
End level is to apart from 2 >=20cm of bent cap；
Step 5：As shown in Figure 4, start trolley hoist engine raising prefabricated case beam 1, its front bottom end is higher than bent cap 2
About 40cm~70cm, preferably 50cm.And start vertical shift purlin car 3 and move prefabricated case beam 1 toward front leg strut direction, until precast box
The lower section of bent cap 2 is left in the rear end of beam 1, and now, the secondary steel wire rope 32 of the front end of purlin car 3 is then in tightening state, can so avoid
The load of main rope 31 of the rear end of purlin car 3 is excessive and the problem of potential safety hazard occurs.
Step 6：As shown in Figure 5, start the rear end of trolley hoist engine raising prefabricated case beam 1, adjust prefabricated case beam 1
It is horizontal for the high official post of beam-ends, and starting vertical shift purlin car 3 will move after prefabricated case beam 1, make prefabricated case beam 1 and bent cap 2 in place.
Meanwhile as shown in Figure 8, fix a jack 5 respectively on four boss 22, and the end of jack 5 by
Edge up and abutted with the bottom of prefabricated case beam 1, herein, the end of jack 5 for cambered surface and carries the projection 51 of an arc, and
The bottom of prefabricated case beam 1 carries prefabricated groove 12, and the end of groove 12 and jack 5 matches, and the bottom of groove 12
Also carry the locating slot 121 to match with projection 51.Accordingly even when the end of groove 12 and jack 5 is accurate not in the very first time
True works good, and groove 12 can also slide along the cambered surface of the end of jack 5, so that the relatively accurately end with jack 5
Matching is together.Moreover, trolley hoist engine, when prefabricated case beam 1 is declined, jack 5 can also decline therewith, so as to
Rocking for prefabricated case beam 1 can be reduced, ensure that the accurate installation of beam.
Step 7：As shown in Figure 9, after beam to be fallen is completed, jack 5 is removed, and in raised line and prefabricated case beam 1
The template and the simultaneously good framework of steel reinforcement of grafting of rectangular frame are put up between bottom, afterwards the penetration concrete in template, wait it solid
Support block 23 can be formed by changing after drying, and support block 23 can turn into the tie point of boss 22 and prefabricated case beam 1, so enhance
The combination of bent cap 2 and prefabricated case beam 1.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Claims (9)
1. a kind of prefabricated box girder hoisting construction technology, comprises the following steps：
When S1, prefabrication of beam, the both sides of beam body must reserve hole for hoist in the beam-ends of distance two about 3.5~4.5m positions（11）；
S2, using beam car prefabricated case beam（1）It is transported in spanning section to be installed, by purlin car（3）The main rope at both ends
（31）Through hole for hoist（11）, and tie up, meanwhile, positioned at purlin car（3）The secondary steel wire rope of front end（32）, with hanging for beam body rear end
Fill hole（11）Tie up, and keep the shape that relaxes, make prefabricated case beam（1）Front end level is to apart from bent cap（2）About 18~22cm；
S3, using trolley hoist engine prefabricated case beam（1）Level lifting is arrived apart from bent cap（2）At 25~35cm of lower section, open
Dynamic vertical shift purlin car（3）Finely tune prefabricated case beam（1）In horizontal direction position, it is ensured that its front end level is to apart from bent cap（2）≥20cm；
S4, start trolley hoist engine raising prefabricated case beam（1）, its front bottom end is higher than bent cap（2）About 40cm~70cm,
Start vertical shift purlin car（3）Toward front leg strut direction movement prefabricated case beam（1）Until prefabricated case beam（1）Rear end leave bent cap（2）Under
Side, now, purlin car（3）The secondary steel wire rope of front end（32）Then it is in tightening state；
S5, start trolley hoist engine raising prefabricated case beam（1）Rear end, adjust prefabricated case beam（1）It is horizontal for the high official post of beam-ends,
Start vertical shift purlin car（3）By prefabricated case beam（1）After move, make prefabricated case beam（1）With bent cap（2）In place and fall beam installation.
A kind of 2. prefabricated box girder hoisting construction technology according to claim 1, it is characterised in that：Work as main rope in S2
（31）Through hole for hoist（11）Afterwards, main rope（31）On can also wear an anti-decylization again（4）, the anti-decylization（4）External diameter
More than hole for hoist（11）Internal diameter.
A kind of 3. prefabricated box girder hoisting construction technology according to claim 2, it is characterised in that：The anti-decylization（4）Face
To hole for hoist（11）One end be taper, and with the hole for hoist（11）Match.
A kind of 4. prefabricated box girder hoisting construction technology according to claim 3, it is characterised in that：The anti-decylization（4）The back of the body
From hole for hoist（11）One end is provided with the teeth towards ring heart（41）.
A kind of 5. prefabricated box girder hoisting construction technology according to claim 1, it is characterised in that：Bent cap（2）Side it is pre-
It is formed with boss（22）, the boss（22）Less than bent cap（2）Upper surface, in S5 before beam is fallen, in boss（22）It is upper first to put
Put jack（5）, and make jack（5）Rise prefabricated case beam（1）Bottom abut against, afterwards when trolley hoist engine decline
When, jack（5）Also can progressively decline.
A kind of 6. prefabricated box girder hoisting construction technology according to claim 5, it is characterised in that：It is completed when falling beam in S5
Afterwards, in boss（22）And prefabricated case beam（1）Between put up template and framework of steel reinforcement, and the penetration concrete in template, wait it
Solidification forms support block after drying（23）.
A kind of 7. prefabricated box girder hoisting construction technology according to claim 5, it is characterised in that：Jack（5）End
For cambered surface, and jack（5）End is also raised with one（51）, and prefabricated case beam（1）Bottom be provided with and jack（5）'s
The groove that end matches（12）, and the groove（12）Bottom carry and projection（51）The locating slot to match（121）.
A kind of 8. prefabricated box girder hoisting construction technology according to claim 7, it is characterised in that：The projection（51）For arc
Shape.
A kind of 9. prefabricated box girder hoisting construction technology according to claim 1, it is characterised in that：Bent cap in S3（2）Two
The upper surface at end carries limited block（21）, the limited block（21）Spacing and prefabricated case beam（1）Width it is equal and described
Limited block（21）Inside edge into chamfering set.
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| CN201710736642.1A CN107524087A (en) | 2017-10-31 | 2017-10-31 | A kind of prefabricated box girder hoisting construction technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356018A (en) * | 2018-09-05 | 2019-02-19 | 重庆建工住宅建设有限公司 | A kind of steel-structure box girder analogy method |
| CN110219242A (en) * | 2019-05-21 | 2019-09-10 | 宁波市政工程建设集团股份有限公司 | A kind of double-deck construction method of installation for synchronizing beam in beam |
| CN112982136A (en) * | 2021-03-03 | 2021-06-18 | 湖北铁甲建设工程有限公司 | Rapid installation structure of small box girder and cover girder of viaduct and construction method thereof |
| CN113699891A (en) * | 2021-08-27 | 2021-11-26 | 上海市基础工程集团有限公司 | Processing, manufacturing and construction method of prefabricated small box girder hanging bracket |
| CN114875803A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Method for hoisting small box girder by bridge girder erection machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356018A (en) * | 2018-09-05 | 2019-02-19 | 重庆建工住宅建设有限公司 | A kind of steel-structure box girder analogy method |
| CN110219242A (en) * | 2019-05-21 | 2019-09-10 | 宁波市政工程建设集团股份有限公司 | A kind of double-deck construction method of installation for synchronizing beam in beam |
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| CN112982136A (en) * | 2021-03-03 | 2021-06-18 | 湖北铁甲建设工程有限公司 | Rapid installation structure of small box girder and cover girder of viaduct and construction method thereof |
| CN112982136B (en) * | 2021-03-03 | 2023-02-14 | 湖北铁甲建设工程有限公司 | Rapid installation structure of small box girder and cover girder of viaduct and construction method thereof |
| CN113699891A (en) * | 2021-08-27 | 2021-11-26 | 上海市基础工程集团有限公司 | Processing, manufacturing and construction method of prefabricated small box girder hanging bracket |
| CN114875803A (en) * | 2022-06-14 | 2022-08-09 | 保利长大工程有限公司 | Method for hoisting small box girder by bridge girder erection machine |
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Application publication date: 20171229 |