CN105002833B - Suspension Hanging Basket preloading method - Google Patents
Suspension Hanging Basket preloading method Download PDFInfo
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- CN105002833B CN105002833B CN201510443725.2A CN201510443725A CN105002833B CN 105002833 B CN105002833 B CN 105002833B CN 201510443725 A CN201510443725 A CN 201510443725A CN 105002833 B CN105002833 B CN 105002833B
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- hanging basket
- carrying platform
- distribution beam
- heap carrying
- end template
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000725 suspension Substances 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 230000005489 elastic deformation Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000036039 immunity Effects 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 230000036316 preload Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The invention discloses a kind of suspension Hanging Basket preloading method, the device used includes the heap carrying platform for placing mass and the distribution beam being arranged in Hanging Basket, described distribution beam is arranged on Hanging Basket end template, described heap carrying platform is suspended in the lower section of described Hanging Basket by steel strand wires, the upper end of described steel strand wires is connected with described distribution beam, and the lower end of described steel strand wires is connected with described heap carrying platform；The method includes: step one, installation distribution beam；Step 2, suspention heap carrying platform；Step 3, classification apply prefabricating load；Step 4, unloading；Step 5, the elastic deformation amount of calculating Hanging Basket end template.The simple in construction of suspension Hanging Basket prepressing device of the present invention, it is the most convenient to mount and dismount, and has saved cost, and can reuse；Hanging Basket preloading method of the present invention is simple to operate, and operating efficiency is high, it is simple to promote the use of.
Description
Technical field
The invention belongs to Hanging Basket prestressing technology field, be specifically related to a kind of suspension Hanging Basket precompressed side
Method.
Background technology
Large span prestressed concrete continuous rigid frame bridge, continuous bridge are across zanjon, rivers, Hu Hai
Deng the most competitive bridge type.Owing to by the influence of topography at bridge location, the construction of Hanging Basket cantilever pouring becomes
One of main construction method.Hanging Basket is mainly made up of steel, will produce non-resilient under load action
Deformation and elastic deformation, the purpose of Hanging Basket precompressed, primarily to eliminate Hanging Basket inelastic deformation, determines
Elastic deformation (takes in pre-arch value in mould absolute altitude), and secondly precompressed is also for checking Hanging Basket
Safety and stability.Therefore, Hanging Basket must carry out precompressed before cantilever construction uses.
At present, the common methods of Hanging Basket precompressed be on Hanging Basket end template piling prepressing, reverse drawing precompressed,
Back-pressure precompressed.Specific as follows:
It is identical that piling prepressing needs that prefabricating load (sandbag or water tank and other) is divided into weight specification
Fractional pack, during precompressed, needs these prefabricating loads utilize tower crane or alternate manner are transported at the bottom of Hanging Basket
In template, when bridge pier is higher, hierarchical loading, unloading consuming time can be caused long, workload is big,
Prefabricating load recycling rate of waterused is low, and whole precompressed cost is high.
Reverse drawing precompressed is to utilize drag unit to carry out Hanging Basket precompressed, and prepressing device needs on cushion cap or ground
Face arranges fixing device, utilizes jack device to carry out the one side of stretch-draw precompressed on Hanging Basket end template
Method, this preloading method needs to arrange anchorage, steel strand wires (essence pricks screw-thread steel), and cost is of a relatively high.
Pre-pressing system safety simultaneously depends primarily on anchor system, accordingly, it would be desirable to spend the highest cost to protect
The safety of whole system during card precompressed, anchor system is installed, is removed workload greatly simultaneously, expends
Time, reusable relatively inefficient.More importantly limited by bridge pier height, when
When load transfer device uses steel strand wires, bridge pier height is the highest, and steel strand wires deformation is the biggest, is likely to result in very heavy
Top line journey is not enough, makes, by stretch-draw pressure operating difficulties, even cannot implement.
Back-pressure precompressed is to utilize to be embedded in the pre-embedded steel slab pouring beam section termination, is welded by precompressed reaction frame
It is connected on steel plate, a kind of Hanging Basket prepressing device that jack is placed between reaction frame and template.This dress
Put to add and unload carried convenient, time-consuming；Reaction frame makes simple, low cost；Pre-press operation is at the bottom of Hanging Basket
In template, space is big, easy to operate.But this device is installed, is dismounted utilization rate complicated, repeatable
Low；Pre-compaction process is likely to be due to reaction frame deformation big, causes jack to occur partially with reaction rack equipment
The heart, causes reaction frame torsional buckling, and precompressed success rate is relatively low.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency of the prior art, it is provided that a kind of Hanging Basket precompressed side
Method, this preloading method is simple to operate, and operating efficiency is high, it is simple to promote the use of.
For achieving the above object, the technical solution used in the present invention is: a kind of suspension Hanging Basket press-fits in advance
Put the method that Hanging Basket is carried out precompressed, it is characterised in that: described suspension Hanging Basket prepressing device includes using
In the heap carrying platform (1) placing mass and the distribution beam (3) being arranged in Hanging Basket (4), institute
Stating distribution beam (3) to be arranged on Hanging Basket end template (4-1), described heap carrying platform (1) passes through steel
Twisted wire (2) is suspended in the lower section of described Hanging Basket (4), and the upper end of described steel strand wires (2) is with described
Distribution beam (3) connects, and the lower end of described steel strand wires (2) is connected with described heap carrying platform (1)；
Described heap carrying platform (1) distance ground 1m～1.5m；Described distribution beam (3) and heap carrying platform (1)
All along the horizontal laying of bridge；The quantity of described distribution beam (3) is two, two described distribution beam
(3) be parallel to each other laying；It is provided with in described distribution beam (3) for being connected with steel strand wires (2)
First hook (7), described heap carrying platform (1) is provided with for being connected with steel strand wires (2)
Second hook (9)；Described distribution beam (3) is to be welded, by two channel-section steels, the box-girder constituted；Institute
State the ring baffle (8) being provided with on heap carrying platform (1) for preventing mass from coming off；
The step that described preloading method includes is as follows:
Step one, installation distribution beam (3): distribution beam (3) is arranged on Hanging Basket end template (4-1)
On；
Step 2, suspention heap carrying platform (1): by under heap carrying platform (1) transport to Hanging Basket (4)
Side, is fixed on the upper end of steel strand wires (2) in distribution beam (3), and another by steel strand wires (2)
One end is fixed on heap carrying platform (1), then measures the initial deflection value of Hanging Basket end template (4-1)
y0；
Step 3, classification apply prefabricating load: carry out point to the upper mass of placing of heap carrying platform (1)
Level loads, and reaches prefabricating load when being loaded onto the 120% of maximum beam section weight, then stops loading,
The Hanging Basket end template (4-1) maximum immunity value y under described prefabricating load is measured after stopping loadingmax；
Step 4, unloading: remove the mass on heap carrying platform (1) and by described suspension Hanging Basket
Prepressing device is removed, and then measures the unloaded deflection value y after Hanging Basket end template (4-1) unloadingmin；
Step 5, the elastic deformation amount X of calculating Hanging Basket end template (4-1)2:
First with formula X=ymax-y0Calculate total deformation X of Hanging Basket end template (4-1)；
Recycling formula X1=ymin-y0Calculate inelastic deformation amount X of Hanging Basket end template (4-1)1；
Finally utilize formula X2=X-X1Calculate the elastic deformation amount X of Hanging Basket end template (4-1)2；
Before carrying out described step 3, carry out prestrain to the upper mass of placing of heap carrying platform (1),
The weight of prestrain is the 40%～50% of described prefabricating load, checks described suspention under preload condition
The safe condition of formula Hanging Basket prepressing device.
The present invention compared with prior art has the advantage that
1, suspension Hanging Basket prepressing device of the present invention and Hanging Basket preloading method are pre-with preloading in prior art
Pressure mode is compared, it is possible to be prevented effectively from and prefabricating load utilizes the modes such as tower crane transport to Hanging Basket end template
On, save the substantial amounts of time, and decrease workload, reduce precompressed cost.
2, suspension Hanging Basket prepressing device of the present invention and Hanging Basket preloading method are pre-with reverse drawing in prior art
Pressure mode is compared, and eliminates the installation and removal of anchor system, while cost-effective, additionally it is possible to
Save the substantial amounts of time.
3, suspension Hanging Basket prepressing device of the present invention and Hanging Basket preloading method are pre-with back-pressure in prior art
Pressure mode is compared, and eliminates the installation of reaction frame, and then avoid causing because of the large deformation of reaction frame
Reaction frame torsional buckling and precompressed success rate are relatively low, and safety is high.
In sum, the simple in construction of suspension Hanging Basket prepressing device of the present invention, convenient disassembly, can weigh
Multiple utilization rate is high, and low cost saves the time, and available one or two set suspension Hanging Basket prepressing device is carried out
Turnover uses, across interior, quick across a movement.Hanging Basket preloading method of the present invention loads and unloads carried convenient,
Simple to operate, it is greatly saved the time, saves the duration.
Below by drawings and Examples, technical scheme is described in further detail.
Accompanying drawing explanation
Fig. 1 is the front view of suspension Hanging Basket prepressing device of the present invention.
Fig. 2 is the right view of suspension Hanging Basket prepressing device of the present invention.
Fig. 3 is the structural representation of distribution beam in suspension Hanging Basket prepressing device of the present invention.
Fig. 4 is that in suspension Hanging Basket prepressing device of the present invention, the annexation of heap carrying platform and ring baffle is shown
It is intended to.
Fig. 5 is the method flow diagram of Hanging Basket preloading method of the present invention.
Description of reference numerals:
1 heap carrying platform；2 steel strand wires；3 distribution beam；
4 Hanging Baskets；4-1 Hanging Basket end template；5 have watered beam section；
6 bridge piers；7 first hooks；8 ring baffles；
9 second hooks.
Detailed description of the invention
A kind of suspension Hanging Basket prepressing device as depicted in figs. 1 and 2, including for placing mass
Heap carrying platform 1 and the distribution beam 3 that is arranged in Hanging Basket 4, described distribution beam 3 is arranged at the bottom of Hanging Basket
In template 4-1, described heap carrying platform 1 is suspended in the lower section of described Hanging Basket 4, institute by steel strand wires 2
The upper end stating steel strand wires 2 is connected with described distribution beam 3, the lower end of described steel strand wires 2 and described preloading
Platform 1 connects.
In the present embodiment, this suspension Hanging Basket prepressing device in use, by being positioned at bridge pier 6 one
Place mass on the heap carrying platform 1 of side to load, utilize steel hinge line 2 by heap carrying platform 1
Loading force is delivered in distribution beam 3, then by distribution beam 3, Hanging Basket end template 4-1 is applied precompression,
I.e. by heap carrying platform 1, distribution beam 3 and steel strand wires 2 constitute a kind of suspension structure with effectively to
Hanging Basket end template 4-1 applies precompression, its simple in construction, and it is the most convenient to mount and dismount, it is possible to weight
Multiple utilization.And owing to heap carrying platform 1 is suspended in the lower section of Hanging Basket 4, facilitate to heap carrying platform 1
Upper placement mass, improves precompressed efficiency.
In the present embodiment, described heap carrying platform 1 is near ground.Further facilitate to heap carrying platform 1
Upper placement mass, and further increase precompressed efficiency, and the height of heap carrying platform 1 is low, i.e.
Make on heap carrying platform 1, to place the heaviest configuration thing, there will not be potential safety hazard.In the present embodiment, excellent
The way of choosing is that described heap carrying platform 1 is apart from ground 1m～1.5m.The most both heap carrying platform will not have been made
1 contacts with ground, also greatly facilitates placement mass on heap carrying platform 1 simultaneously.
As depicted in figs. 1 and 2, described distribution beam 3 and heap carrying platform 1 are all along the horizontal laying of bridge.
By distribution beam 3 being laid along the horizontal of bridge, facilitate the installation and removal of distribution beam 3, simultaneously
Can make distribution beam 3 that Hanging Basket end template 4-1 is applied uniform precompression.By by heap carrying platform 1
Along the horizontal laying of bridge, described heap carrying platform 1 is corresponding with distribution beam 3, so can make preloading
Loading force on platform 1 is delivered in distribution beam 3 uniformly.
In the present embodiment, the quantity of described distribution beam 3 is two, and two described distribution beam 3 are the most flat
Row is laid.Two parallel distribution beam 3 effectively can apply precompression to Hanging Basket end template 4-1.
As it is shown on figure 3, be provided with in described distribution beam 3 for be connected with steel strand wires 2 upper end first
Hook 10.By arranging the first hook 10 in distribution beam 3, it is possible to realize steel strand wires 2 and distribution
The firm connection of beam 3, it is to avoid steel strand wires 2 produce sliding with the junction point of distribution beam 3.
As shown in Figure 4, described heap carrying platform 1 is provided with for be connected with steel strand wires 2 lower end
Two hooks 9.By arranging the second hook 9 on heap carrying platform 1, it is possible to realize steel strand wires 2 and heap
The firm connection of carrying platform 1, it is to avoid steel strand wires 2 produce sliding with the junction point of heap carrying platform 1.
In the present embodiment, described distribution beam 3 is to be welded, by two channel-section steels, the box-girder constituted.This sample prescription
The making of distribution beam 3, meanwhile, when installing distribution beam 3, as long as distribution beam 3 is placed on
On Hanging Basket end template 4-1, the distribution beam 3 of box beam form is utilized to contact cooperation with Hanging Basket end template 4-1,
And under the pulling force effect of heap carrying platform 1, the distribution beam 3 peace on Hanging Basket end template 4-1 can be realized
Dress.
As shown in Figure 4, described heap carrying platform 1 is provided with the annular gear for preventing mass from coming off
Plate 8.By arranging ring baffle 8 on heap carrying platform 1, it is possible to effectively prevent mass from coming off,
Ensure that safety.
A kind of side utilizing above-mentioned suspension Hanging Basket prepressing device that Hanging Basket carries out precompressed as shown in Figure 5
Method, the method includes:
Step one, installation distribution beam 3: distribution beam 3 is arranged on Hanging Basket end template 4-1, Hanging Basket
4 are arranged on and water in beam section 5；
Step 2, suspention heap carrying platform 1: heap carrying platform 1 is transported to Hanging Basket 4, steel is twisted
The upper end of line 2 is fixed in distribution beam 3, and the other end of steel strand wires 2 is fixed on heap carrying platform 1
On, then measure initial deflection value y of Hanging Basket end template 4-10；
Step 3, classification apply prefabricating load: place mass on heap carrying platform and carry out hierarchical loading,
Reach prefabricating load when being loaded onto the 120% of maximum beam section weight, then stop loading, stop loading
Rear measurement Hanging Basket end template maximum immunity value y under prefabricating loadmax, described maximum immunity value ymax
It is the stabilization at Hanging Basket end template 4-1, i.e. when Hanging Basket end template 4-1 deflection value does not changes
Record；While hierarchical loading, the classification measured under Hanging Basket end template 4-1 loads at every grade is scratched
Angle value yn, to monitor the deformation of Hanging Basket end template 4-1 in real time, when the deformation of Hanging Basket end template 4-1 goes out
When now suddenling change, then explanation Hanging Basket quality goes wrong；
Step 4, unloading: remove the mass on heap carrying platform 1 and by described suspension Hanging Basket precompressed
Device is removed, and then measures the unloaded deflection value y after Hanging Basket end template 4-1 unloadingmin；
Step 5, the elastic deformation amount X of calculating Hanging Basket end template 4-12:
First with formula X=ymax-y0Calculate total deformation X of Hanging Basket end template 4-1；
Recycling formula X1=ymin-y0Calculate inelastic deformation amount X of Hanging Basket end template 4-11；
Finally utilize formula X2=X-X1Calculate the elastic deformation amount X of Hanging Basket end template 4-12。
In the present embodiment, this preloading method is simple to operate, and operating efficiency is high, it is possible to eliminate Hanging Basket 4
Inelastic deformation, and then determine elastic deformation, secondly can effectively verify that the safety of Hanging Basket 4 is with steady
Qualitative.In the present embodiment, utilize level gauge and total station survey deflection value.
In the present embodiment, before step 3, on heap carrying platform 1, place mass carry out prestrain,
The weight of prestrain is the 40%～50% of described prefabricating load, checks described suspention under preload condition
The safe condition of formula Hanging Basket prepressing device.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, all
It is any simple modification, change and equivalence above example made according to the technology of the present invention essence
Reconfiguration, all still falls within the protection domain of technical solution of the present invention.
Claims (1)
1. the method that a suspension Hanging Basket prepressing device carries out precompressed to Hanging Basket, it is characterised in that:
Described suspension Hanging Basket prepressing device includes the heap carrying platform (1) for placing mass and is arranged on
Distribution beam (3) in Hanging Basket (4), described distribution beam (3) is arranged on Hanging Basket end template (4-1)
On, described heap carrying platform (1) is suspended in the lower section of described Hanging Basket (4) by steel strand wires (2),
The upper end of described steel strand wires (2) is connected with described distribution beam (3), under described steel strand wires (2)
End is connected with described heap carrying platform (1)；Described heap carrying platform (1) distance ground 1m～1.5m；Institute
State distribution beam (3) and heap carrying platform (1) all along the horizontal laying of bridge；Described distribution beam (3)
Quantity be two, two described distribution beam (3) are parallel to each other laying；In described distribution beam (3)
It is provided with the first hook (7) for being connected with steel strand wires (2), on described heap carrying platform (1)
It is provided with the second hook (9) for being connected with steel strand wires (2)；Described distribution beam (3) is served as reasons
The box-girder that two channel-section steel welding are constituted；It is provided with for preventing counterweight on described heap carrying platform (1)
The ring baffle (8) that thing comes off；
The step that described preloading method includes is as follows:
Step one, installation distribution beam (3): distribution beam (3) is arranged on Hanging Basket end template (4-1)
On；
Step 2, suspention heap carrying platform (1): by under heap carrying platform (1) transport to Hanging Basket (4)
Side, is fixed on the upper end of steel strand wires (2) in distribution beam (3), and another by steel strand wires (2)
One end is fixed on heap carrying platform (1), then measures the initial deflection value of Hanging Basket end template (4-1)
y0；
Step 3, classification apply prefabricating load: carry out point to the upper mass of placing of heap carrying platform (1)
Level loads, and reaches prefabricating load when being loaded onto the 120% of maximum beam section weight, then stops loading,
The Hanging Basket end template (4-1) maximum immunity value y under described prefabricating load is measured after stopping loadingmax；
Step 4, unloading: remove the mass on heap carrying platform (1) and by described suspension Hanging Basket
Prepressing device is removed, and then measures the unloaded deflection value y after Hanging Basket end template (4-1) unloadingmin；
Step 5, the elastic deformation amount X of calculating Hanging Basket end template (4-1)2:
First with formula X=ymax-y0Calculate total deformation X of Hanging Basket end template (4-1)；
Recycling formula X1=ymin-y0Calculate inelastic deformation amount X of Hanging Basket end template (4-1)1；
Finally utilize formula X2=X-X1Calculate the elastic deformation amount X of Hanging Basket end template (4-1)2；
Before carrying out described step 3, carry out prestrain to the upper mass of placing of heap carrying platform (1),
The weight of prestrain is the 40%～50% of described prefabricating load, checks described suspention under preload condition
The safe condition of formula Hanging Basket prepressing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443725.2A CN105002833B (en) | 2015-07-25 | 2015-07-25 | Suspension Hanging Basket preloading method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443725.2A CN105002833B (en) | 2015-07-25 | 2015-07-25 | Suspension Hanging Basket preloading method |
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| CN105002833A CN105002833A (en) | 2015-10-28 |
| CN105002833B true CN105002833B (en) | 2016-10-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111693366A (en) * | 2020-05-27 | 2020-09-22 | 中冶建筑研究总院有限公司 | Construction method for pre-loading structure in limited space |
| CN113152293B (en) * | 2021-04-16 | 2023-02-24 | 中国葛洲坝集团第一工程有限公司 | Continuous rigid frame bridge cast-in-place bracket prepressing device and prepressing method |
| CN113585073B (en) * | 2021-06-28 | 2024-10-11 | 浙江理工大学 | Counterweight method for suspension platform |
| CN113430953B (en) * | 2021-07-28 | 2022-10-28 | 江苏瑞沃建设集团有限公司 | Pre-compaction device of hanging basket for cantilever construction bridge support |
| CN114182649B (en) * | 2021-12-10 | 2024-01-02 | 中铁十局集团青岛工程有限公司 | Continuous beam hanging basket construction pre-pressing loading device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3946342B2 (en) * | 1998-03-09 | 2007-07-18 | 三井住友建設株式会社 | Bridge erection device |
| CN201972094U (en) * | 2011-03-03 | 2011-09-14 | 中铁四局集团第一工程有限公司 | Prepressing system of hanging basket in suspending irrigation construction |
| CN202766971U (en) * | 2011-12-26 | 2013-03-06 | 中铁七局集团有限公司 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
| CN102912738B (en) * | 2012-11-07 | 2014-12-03 | 北京市公路桥梁建设集团有限公司 | Overall prepressing device for hanging basket |
| CN103362074B (en) * | 2013-07-31 | 2015-07-01 | 中交二航局第三工程有限公司 | Bridge cantilever box girder construction hanging basket pre-pressing loading device |
| CN204163412U (en) * | 2014-10-27 | 2015-02-18 | 重庆建工集团股份有限公司 | Steel truss precompressed Special hoop |
| CN204940135U (en) * | 2015-07-25 | 2016-01-06 | 西安科技大学 | Suspension Hanging Basket prepressing device |
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