CN104100045B - A kind of prestressed cable or steel strand wires and the attachment structure of pole termination - Google Patents
A kind of prestressed cable or steel strand wires and the attachment structure of pole termination Download PDFInfo
- Publication number
- CN104100045B CN104100045B CN201310128443.4A CN201310128443A CN104100045B CN 104100045 B CN104100045 B CN 104100045B CN 201310128443 A CN201310128443 A CN 201310128443A CN 104100045 B CN104100045 B CN 104100045B
- Authority
- CN
- China
- Prior art keywords
- plate
- roller
- steel strand
- strand wires
- attachment structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of prestressed cable or steel strand wires and the attachment structure of pole termination, it is characterised in that roller devices is provided with the top of pole, the prestressed cable or steel strand wires are connected by the roller devices with pole.The roller devices include upper plate and the lower plate be arrangeding in parallel, and the upper and lower plate is provided with roller bearing hole, is equipped with the roller bearing hole of upper and lower plate on a roller bearing, the roller bearing and is cased with roller.Plate in can increasing when steel strand wires quantity is more, a roller is set between upper plate and middle plate, a roller is set between middle plate and lower plate.The advantage of patent of the present invention is that overcome steel strand wires rolls in prestressed stretch-draw, it is to avoid the danger of abrasion, fracture of wire with contact surface steel plate edge tip, further ensure construction safely, extend the service life of steel strand wires.
Description
Technical field
The present invention relates in the support fish belly sill or beam string used in engineering every field.For two kinds of beam knots
Structure, is strengthened bottom girder, this patent is specifically related to a kind of pole end structure using prestress wire combination pole, main
It is used to be improved the existing pole termination used, is particularly suitable for use in fish belly sill support pole termination.
Background technology
" fish belly sill " is a kind of beam of uniform strength commonly used in industrial premises, is mainly set not according to beam internal force difference
With the open web type frame structural beam in section so that the maximum (normal) stress on each section of structure is equal to the allowable of material should
Power.Because it is similar to fish belly, so it is referred to as " fish belly sill "（As shown in Figure 1）.Part R＆D institution makes improvements now
And applied to base pit engineering and longspan structure（Using beam string）In, one kind is combined to form using shaped steel and prestress wire
It is easy to dismount, construct the rapid, supporting construction of reusable edible, and then forms the interior branch of fish belly sill support system formation foundation ditch
Support, or in Long-span Suspended Structure.Relative to the fish belly sill in industrial premises, its difference is the curved beam of the beam by original
Tensional element is changed to that prestressed steel strand wires can be applied.In base pit engineering, the shaped steel of fish belly sill and large span is combined to support, fish
Two angle points of web grider 1 are with shaped steel to support（It is primarily subjected to pressure）Consolidation forms a kind of inner support system of closing（As shown in Figure 2）.
Before excavation of foundation pit, shaped steel applies prestressing force simultaneously to support with fish belly sill steel strand wires, and the earthwork is carried out after prestressing force reaches design load
Excavate.The major advantage of the support system most is that fish belly sill is to be close to enclosure wall（Stake）Structure, only the shaped steel at two ends to support
Across in foundation ditch both sides, therefore there is no any construction member, earth excavation, reinforcing bar colligation and concrete to region between support
The more conventional intensive, construction big to support system working space of process such as pour rapid；Next to that such support system is by type
Steel and steel strand wires are through bolt or are formed by welding, component can prefabrication, on-site consolidation, dismounting, reusable edible, economic indicator
It is low, meet present low-carbon, the environmental protection concept of green.
However, the development and application of this technology are still in initial stage, many place Shortcomings are needed badly further excellent
Change.For fish belly girder construction, its subject matter is that steel strand wires are easy to wear, fracture of wire, once abrasion is to a certain extent, steel strand wires
The safety of field personnel or even caving in for foundation ditch will likely be injured by occurring fracture, and this is absolute in cyclic utilization system
Do not allow.
Equally, in tension string beam structure, because pole and prestress wire are not completely fixed, by live load
Easily rubbed during load, the serious curtailment service life of steel strand wires.
The content of the invention
, can it is an object of the present invention to provide a kind of prestressed cable or steel strand wires and the attachment structure of pole termination
Avoid that steel strand wires are easy to wear, fracture of wire phenomenon, the service life of extending structure, available in fish belly sill or beam string.
In order to realize the above object the technical scheme is that：A kind of prestressed cable or steel strand wires and pole termination
Attachment structure, it is characterised in that roller devices are installed on the top of pole, the prestressed cable or steel strand wires pass through this
Roller devices are connected with pole.The roller devices include upper plate and the lower plate be arrangeding in parallel, and the upper and lower plate is provided with roller bearing
Hole, is equipped with a roller bearing, the roller bearing in the roller bearing hole of upper and lower plate and is cased with roller.Can when steel strand wires quantity is more
With plate in increase, a roller is set between upper plate and middle plate, a roller is set between middle plate and lower plate.The outer surface of roller is in interior
Recessed smooth arc-shaped surface.When steel strand wires negligible amounts or its position need to accurately be fixed, one can be set up on roller appearance arc surface
Each and every one little groove, each groove corresponds to some steel strand wires.Roller external diameter is 80 ~ 120mm, gap between roller and roller bearing
For 1 ~ 2mm, the radius of curvature of the inner concave arc surface of roller outer surface is 220 ~ 280mm, and the radius of curvature of little groove is 10 ~ 30mm.
The roller system is connected using anchor plate with the blocking plate on support pole top by high-strength bolt.Upper plate, middle plate and lower thickness of slab
Spend for 6 ~ 12mm, planar dimension 5*5 ~ 35*35cm, upper plate, middle plate and lower plate and anchor plate are using being welded to connect.Upper plate and middle plate
And between middle plate and lower plate, a supporting plate is respectively welded in roller both sides, it is firm overall to constitute one with upper, middle and lower plate.
Steel strand wires extend, rolled along steel roller is smooth, so as to avoid steel strand wires in shaped steel during prestress application
Slided on chimb and cause steel strand wires abrasion, fracture of wire., can be from several meters to tens of because the span excursion of fish belly sill is larger
Rice, therefore the size of roller shaft can calculate determination according to its span or the quantity of steel strand wires.The roller system on new depression bar top
System, it is easy to situations such as applying prestressing force and reduce abrasion, fracture of wire during steel strand prestress applies；Reduce construction risk system
The service life of number, extension prestress wire.
Brief description of the drawings
Fig. 1 is fish belly sill schematic diagram in industrial premises.
Fig. 2 is assembled fish belly sill inner support system application example.
Fig. 3 is fish belly sill support system structural map in the prior art.
Fig. 4 is strut ends head structure figure in the prior art.
Fig. 5 is fish belly sill structural map of the invention.
Fig. 6 supports the drawing of pole end structure for the fish belly sill of the present invention.
Fig. 7 is Fig. 6 profile.
Embodiment
By certain foundation ditch 37m across fish belly sill exemplified by, the arrangement of fish belly sill is as shown in figure 3,2 be that steel encloses purlin in figure, 3 be outside steel
Support, 4 be steel tie-rod, and 5 be support pole, and 6 be steel strand wires.Fig. 4 is the strut ends head structure figure of prior art, the pole termination
Including upper plate 8, middle plate 9 and lower plate 10, in upper, middle and lower plate weld to anchor plate 14, anchor plate 14 is connected by screw bolts to pole
Blocking plate 15, be also associated with middle securing plate 18 and head-on plate 19, so, steel strand wires 6 between the upper, middle and lower plate
Head-on plate 19 directly with support pole 5 is contacted, the outsourcing plastic layer of steel strand wires is highly prone to during prestress application
Wear-out failure, influences its service life.According to the present invention, the arrangement of fish belly sill is as shown in Figure 5.It is different from original design fish belly sill
It is to support the top of pole 5 to be provided with roller devices 7 at every, the structure of roller devices 7 refers to Fig. 6,7.Roller devices 7 are wrapped
A roller bearing 11 is included, roller bearing 11 is connected with upper and lower plate, and fixed with nut, bolt 12.Two rollers 17 are arranged with outside roller bearing 11,
One of roller is located between upper plate 8 and middle plate 9, and another roller is located between middle plate 9 and lower plate 10.Between upper, middle plate with
And the supporting plate 13 that thickness is 20mm is welded between middle plate and lower plate, and by the upper, middle and lower plate weld to anchor plate 14,
Anchor plate 14 is connected to the blocking plate 15 of pole using bolt 16, and whole system is stable and firm.Between roller and roller bearing and
Roller surface, which applies one layer of lubricating oil, can further increase the lubricity of roller.
The roller design of pole termination and making are as shown in Figure 6,7.
The unitary construction of fish belly sill system uses existing general structure, not within current invention scope.Anchoring
Plate：Thickness about 12 ~ 18mm steel plate is chosen, planar dimension is about 300 ~ 350*300 ~ 350mm, pass through high-strength bolt and pole
Blocking plate is connected.Other requirements as anchor plate can be consistent with blocking plate, thus can directly utilizing works or scene steel plate,
Convenient material drawing.
Upper, middle and lower plate：The thickness of upper plate, middle plate and lower plate thickness can be determined according to force analysis.Used for conventional
Fish belly sill inner support pole, it is about 10 ~ 12mm thick to choose thickness, the steel plate that planar dimension is about 300*300mm, end with
Anchor plate weld.The perforate at roller bearing, opening diameter can be determined according to conventional roller size, should can meet prestress wire
Intensity requirement after tensioning in place, can meet the intensity requirement of steel plate in itself again.In view of fish belly beam span it is larger when, steel twist
Line is relatively more, to avoid the uneven stress of depression bar, and steel strand wires can be evenly arranged on roller bearing up and down, for ease of control, set with
The equal middle plate of upper and lower board size.Meanwhile, roller makes the spill of circular arc type, may be such that prestress wire after stress certainly
It is mobile in the middle of trend, it is to avoid steel strand wires arrangements is at random, pole eccentric compression the problem of, prevent depression bar unbalance stress, cause to put down
Lateral stability problem.
Supporting plate：Choose thickness be 16 ~ 20mm steel plate, be vertically arranged, its planar dimension should reach roller bearing center, it is upper below with
It is upper, in and in, the distance between lower plate determines.According to fish belly sill system conventional at present, long * height is about 120*135mm.Supporting plate
Length is mainly determined by the position of steel strand wires or the global shape of fish belly sill.Two pieces are placed away from anchor plate edge 10mm, up and down
With plate weld firmly, the side close to anchor plate side is with anchoring plate weld on side.Whole system good integrity, intensity is high, it can be ensured that
The intensity requirement of system after prestress application.
Roller：The size of roller bearing should determine that upper and lower section of roller bearing is adopted according to the across footpath of fish belly sill or the total pulling force of steel strand wires
Fixed with bolt, can also use the pin of some strength.The section of roller is in the cambered surface of indent（As shown in Figure 7）, with roller bearing it
Between have 1 ~ 2mm gap, the contact surface between roller and roller bearing should be polished smooth, beneficial to the rolling of pulley.Roller outer surface
The radius of curvature of inner concave arc surface determines that the radius of curvature of inner concave arc surface is preferably 220 ~ 280mm according to the quantity of steel strand wires.Roller
Whole outer surfaces should scribble lubricating oil, it is ensured that roller rolls more smooth., can also be according to steel strand wires when needing registration
Position set on roller outer surface and be used to position the little grooves of steel strand wires one by one.
The advantage of the invention is that：
1st, roller pivoting under stressing conditions, is not in steel strand wires and branch during prestress wire application
Situation that the pole spacing head plate arm of angle sharply rubs, it is to avoid the phenomenon such as the abrasion of steel strand wires, fracture of wire, further ensure that the peace of structure
Entirely, while recoverable rate is high, environmental protection, economic theory are met.
2nd, the mechanism design stability of whole roller bearing is good, and intensity is high.
3rd, roller system can prefabrication, on-site consolidation, assembled speed is fast, and precision controlling is high.
4th, roller outer surface is in indent cambered design, and steel strand wires will can avoid steel from twisting under stressing conditions to centre concentration
Distance dispersion, causes fish belly sill Out-Plane Stability Problems.
Claims (8)
1. a kind of prestressed cable or steel strand wires and the attachment structure of pole termination, it is characterised in that be provided with the top of pole
Roller devices, the prestressed cable or steel strand wires are connected by the roller devices with pole, and the roller devices include parallel
The upper plate of setting, middle plate and lower plate, the upper, middle and lower plate are provided with roller bearing hole, and one is equipped with the roller bearing hole of upper, middle and lower plate
Be cased with two rollers on roller bearing, the roller bearing, one of roller is located between upper plate and middle plate, another roller be located at middle plate and
Between lower plate.
2. the attachment structure as described in claim 1, it is characterised in that：The outer surface of roller is in the smooth arc-shaped surface of indent.
3. the attachment structure as described in claim 2, it is characterised in that：The roller outer surface is used to position steel strand provided with multiple
The little groove of line.
4. the attachment structure as described in claim 2, it is characterised in that：Gap is 1 ~ 2mm between roller and roller bearing.
5. the attachment structure as described in any one in claim 2 ~ 4, it is characterised in that：The roller devices using anchor plate with
The blocking plate connection on pole top.
6. the attachment structure as described in claim 5, it is characterised in that：The steel plate thickness that upper plate, middle plate and lower plate are used for 6 ~
12mm, planar dimension 5*5 ~ 35*35cm, upper plate, middle plate and lower plate and anchor plate are used and are welded to connect.
7. the attachment structure as described in claim 5, it is characterised in that：Between upper plate and middle plate and middle plate and lower plate, in rolling
Wheel both sides are respectively welded a supporting plate, and it is firm overall to constitute one with upper, middle and lower plate.
8. the attachment structure as described in claim 7, it is characterised in that：The attachment structure is used for fish belly sill and supports strut ends
Head, the supporting plate uses thickness for 18 ~ 22mm steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128443.4A CN104100045B (en) | 2013-04-15 | 2013-04-15 | A kind of prestressed cable or steel strand wires and the attachment structure of pole termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128443.4A CN104100045B (en) | 2013-04-15 | 2013-04-15 | A kind of prestressed cable or steel strand wires and the attachment structure of pole termination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104100045A CN104100045A (en) | 2014-10-15 |
| CN104100045B true CN104100045B (en) | 2017-07-21 |
Family
ID=51668558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310128443.4A Active CN104100045B (en) | 2013-04-15 | 2013-04-15 | A kind of prestressed cable or steel strand wires and the attachment structure of pole termination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104100045B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087712A (en) * | 2016-08-11 | 2016-11-09 | 上海市政工程设计研究总院（集团）有限公司 | It is applicable to the rolling support system of the jump stay of Long-Span Tied Arch Bridge |
| CN108560563A (en) * | 2018-05-24 | 2018-09-21 | 东南大学 | A kind of deep foundation pit support prestressing force fish belly sill that drag-line can be locked |
| CN108677964A (en) * | 2018-05-24 | 2018-10-19 | 东南大学 | A kind of prestressing force fish belly sill of the deep foundation pit support with anti-rotation rope |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH573321A5 (en) * | 1974-12-10 | 1976-03-15 | Mueller Gerhard | Suspended cableway with horizontal and curved cables - has stabilising plates for connecting horizontal cables to curved suspension cable |
| CN201221055Y (en) * | 2008-06-20 | 2009-04-15 | 上海浦江缆索股份有限公司 | Device for placing cable trolley on main cable strand tower top |
| KR20110003815A (en) * | 2009-07-06 | 2011-01-13 | 이하란 | Prestressed temporary construction structure and method for land-side protection wall using the same |
| CN102733397A (en) * | 2012-07-19 | 2012-10-17 | 上海新强劲工程技术有限公司 | Inner supporting connecting element with variable dimension and force transmission direction for retaining and protecting foundation pit |
| CN102839677A (en) * | 2012-09-26 | 2012-12-26 | 上海新强劲工程技术有限公司 | Multifunctional rectangular connecting piece for internal support of foundation pit |
-
2013
- 2013-04-15 CN CN201310128443.4A patent/CN104100045B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH573321A5 (en) * | 1974-12-10 | 1976-03-15 | Mueller Gerhard | Suspended cableway with horizontal and curved cables - has stabilising plates for connecting horizontal cables to curved suspension cable |
| CN201221055Y (en) * | 2008-06-20 | 2009-04-15 | 上海浦江缆索股份有限公司 | Device for placing cable trolley on main cable strand tower top |
| KR20110003815A (en) * | 2009-07-06 | 2011-01-13 | 이하란 | Prestressed temporary construction structure and method for land-side protection wall using the same |
| CN102733397A (en) * | 2012-07-19 | 2012-10-17 | 上海新强劲工程技术有限公司 | Inner supporting connecting element with variable dimension and force transmission direction for retaining and protecting foundation pit |
| CN102839677A (en) * | 2012-09-26 | 2012-12-26 | 上海新强劲工程技术有限公司 | Multifunctional rectangular connecting piece for internal support of foundation pit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104100045A (en) | 2014-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105421235B (en) | Lateral prestress application method for paving reinforcing bar concrete on bridge floor of assembled type bridge | |
| CN102926333B (en) | External prestressed reinforcement structure for old bridge and construction method thereof | |
| US8756874B2 (en) | Traffic signal supporting structures and methods | |
| CN203270457U (en) | Suspension bar anchoring structure capable of initiatively reinforcing concrete tied-arch bridge | |
| CN109853404A (en) | Steel truss girder bridge cantilever assembly erection method | |
| CN104100045B (en) | A kind of prestressed cable or steel strand wires and the attachment structure of pole termination | |
| CN104652242B (en) | Derrick connecting structure used for reinforcing PSC (Pre-stressed Concrete) continuous box girder bridge and construction method | |
| KR101527782B1 (en) | Management and reverse displacement of composite bridge composite inclined support installation method | |
| CN108999088A (en) | A kind of construction method of cable-stayed bridge | |
| CN104652244B (en) | A kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method | |
| CN101967795B (en) | Novel built-in cable-truss anchoring structure and construction method thereof | |
| CN203296051U (en) | Prestress fish belly sill supporting strut end | |
| CN105586826A (en) | Connecting structure of anchorage ends of booms of concrete tied arch bridge and construction method of connecting structure | |
| Pipinato | Coupled safety assessment of cable stay bridges | |
| Colford et al. | Forth Road Bridge main cables: replacement/augmentation study | |
| CN115748413A (en) | Continuous steel truss web-plate truss double-layer combined swivel bridge structure | |
| CN106049279B (en) | Inhaul cable anchorage structure in steel box-girder | |
| Zhang et al. | Construction monitoring and load testing of a pedestrian suspension bridge in China | |
| Ascaso Til et al. | Nizhou Bridge, China: an insight into deck erection gantries supported on main suspension cables | |
| CN110318557B (en) | Prestressed concrete hollow slab reinforcing device and method | |
| Wang et al. | Design and construction of the Second Humen Bridge, China | |
| Park et al. | Load balancing external post-tensioning for strengthening existing inverted-T bent caps | |
| CN110426284A (en) | A kind of large-tonnage cantilevered self-balancing plate test loading system and its implementation method | |
| CN204876163U (en) | Inside and outside shear force wall of crane span structure formula precast concrete | |
| Biliszczuk et al. | The two largest Polish concrete bridges–design and construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |