CN203296051U - Prestress fish belly sill supporting strut end - Google Patents
Prestress fish belly sill supporting strut end Download PDFInfo
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- CN203296051U CN203296051U CN201320186123XU CN201320186123U CN203296051U CN 203296051 U CN203296051 U CN 203296051U CN 201320186123X U CN201320186123X U CN 201320186123XU CN 201320186123 U CN201320186123 U CN 201320186123U CN 203296051 U CN203296051 U CN 203296051U
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- fish belly
- belly sill
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Abstract
The utility model discloses a prestress fish belly sill supporting strut end which is characterized in that an idler wheel device is arranged at the top end of a supporting strut of a fish belly sill. The idler wheel device comprises an upper plate and a lower plate, the upper plate and the lower plate are arranged in parallel, roller holes are formed in the upper plate and the lower plate, the roller holes of the upper plate and the lower plate are respectively provided with a roller in a penetrating mode, and the rollers are sleeved with idler wheels. When the number of stranded wires is large, a middle plate can be arranged additionally, an idler wheel is arranged between the upper plate and the middle plate, and an idler wheel is arranged between the middle plate and the lower plate. The prestress fish belly sill supporting strut end has the advantages that the risks of abrasion of the stranded wires of the fish belly sill and the sharp end of the edge of a steel plate and wire fracture of the stranded wires of the fish belly sill in the process of prestress tension are avoided, construction safety is guaranteed furthermore, and the service life of the stranded wires is prolonged.
Description
Technical field
The utility model relates to the prefabricated PC fish belly sill inner support system that adopts at base pit engineering, is specifically related to a kind of prestressing force fish belly sill and supports the pole termination, is mainly used in the pole termination that the fish belly sill to existing use supports and improves.
Background technology
Prestressing force fish belly sill inner support system is a kind of novel foundation pit support system, is mainly used in substituting reinforced concrete support or the type steel support that conventional open cut is adopted.This fish belly sill support system is at present existing part research practice unit research, and obtained certain achievement in research, and successful implementation application in a plurality of engineerings at home.
" fish belly sill " is a kind of beam of uniform strength commonly used in industrial premises, mainly according to the different open web type frame structural beams that different cross section is set of beam internal force, makes maximum （normal） stress on each cross section of structure be equal to the allowable stress of material.Due to its likeness in form fish belly, so be referred to as " fish belly sill " (as shown in Figure 1).Part R&D institution makes improvements and is applied in base pit engineering now, adopt shaped steel and prestress wire in conjunction with form a kind of be easy to dismounting, construction rapidly, the braced structures of reusable edible, and then form the fish belly sill support system.With respect to the fish belly sill in industrial premises, its difference is that the curved beam of this beam is changed into and can be applied prestressed steel strand by former tensional element.In base pit engineering, the shaped steel of fish belly sill and large span is to the support combination, and two angle points of fish belly sill 1 and shaped steel are to supportting the inner support system (as shown in Figure 2) of a kind of sealing of (mainly bearing pressure) fixed formation.Before excavation of foundation pit, shaped steel applies prestressing force simultaneously to support and fish belly sill steel strand, after prestressing force reaches design load, carries out soil excavation.This support system major advantage is that fish belly sill is the structure of being close to enclosure wall (stake), the shaped steel that only has two ends to support across in the foundation ditch both sides, therefore between to support zone without any construction member, the operations such as soil excavation, reinforcing bar binding and concreting are all than conventional intensive, construction large to the support system working space rapidly; To be such support system form through bolt or welding by shaped steel and steel strand for next, but member prefabrication, on-site consolidation, dismounting, and reusable edible, economic indicator are low, meet present low-carbon (LC), green environmental protection concept.
Yet the development and application of this technology still is in initial stage, and a lot of local Shortcomings, need further optimization badly.For the fish belly sill structure, its subject matter is that steel strand are easy to wear, fracture of wire, in case may wear to a certain degree, the safety that the steel strand fracture may injure the field personnel is caving in of foundation ditch even, and this is definitely unallowed in cyclic utilization system.
The utility model content
The purpose of this utility model is to provide a kind of prestressing force fish belly sill and supports the pole termination, can avoid that steel strand are easy to wear, the phenomenon of fracture of wire.
In order to realize above purpose, the technical solution of the utility model is: a kind of prestressing force fish belly sill supports the pole termination, it is characterized in that, on the top of the support pole of fish belly sill, roller devices is installed.Described roller devices comprises upper plate and the lower plate that be arranged in parallel, and described upper and lower plate has the roller bearing hole, in the roller bearing hole of upper and lower plate, is equipped with a roller bearing, and on described roller bearing, cover has roller.Plate in increasing between upper plate and lower plate when steel strand quantity is more, establish a roller between upper plate and middle plate, between middle plate and lower plate, establish a roller.The external surface of roller is the smooth arc-shaped surface of indent.The roller external diameter is 80 ~ 120mm, and between roller and roller bearing, spacing is 1 ~ 2mm, and the radius of curvature of the inner concave arc surface of roller external surface is 220 ~ 280mm.This roller system adopts anchor plate to be connected by high-strength bolt with the blocking plate that fish belly sill supports the pole top.Upper plate, middle plate and lower plate thickness are 10 ~ 12mm, planar dimension 25*25 ~ 35*35cm, and upper plate, middle plate and lower plate and anchor plate adopt and are welded to connect.Between upper plate and middle plate and middle plate and lower plate, in the roller both sides, be welded with respectively a supporting plate, with the upper, middle and lower plate, form a firm integral body.
Steel strand elongation in the prestress application process, along the smooth and easy rolling of steel roller, thereby avoid steel strand to slide on the shaped steel chimb and cause that steel strand wear and tear, fracture of wire.Because the span excursion of fish belly sill is larger, can be from several meters to tens of rice, so the size of roller shaft can be according to the quantity calculative determination of its span or steel strand.The roller system on novel fish belly sill depression bar top, be easy to apply prestressing force and reduce the fish belly sill steel strand prestress and apply the situations such as wearing and tearing, fracture of wire in process; Reduce the application life of construction danger coefficient, prolongation prestress wire.
The accompanying drawing explanation
Fig. 1 is fish belly sill schematic diagram in industrial premises.
Fig. 2 is assembling fish belly sill inner support system applies example.
Fig. 3 is fish belly sill support system constructional drawing in prior art.
Fig. 4 is strut ends head structure figure in prior art.
Fig. 5 is fish belly sill constructional drawing of the present utility model.
Fig. 6 is the drawing that fish belly sill of the present utility model supports the strut ends header structure.
Fig. 7 is the sectional drawing of Fig. 6.
The specific embodiment
Take certain foundation ditch 37m across fish belly sill as example, as shown in Figure 3, in figure, 2 for steel encloses purlin for the layout of fish belly sill, 3 support outward for steel, 4 is the steel tie-rod, 5 for supporting pole, 6 is steel strand.Fig. 4 is the strut ends head structure figure of prior art, described pole termination comprises upper plate 8, middle plate 9 and lower plate 10, the upper, middle and lower plate is welded on anchor plate 14, anchor plate 14 blocking plate to pole 15 with bolts, gusset plate 18 and the plate 19 that heads in the middle of between the plate of described upper, middle and lower, also being connected with, so, steel strand 6 will directly contact with the head-on plate 19 that supports pole 5, the outsourcing plastic layer of steel strand very easily is worn destruction in the prestress application process, affects its application life.According to the utility model, the layout of fish belly sill as shown in Figure 5.Different from former design fish belly sill is, on the every top of supporting pole 5, is provided with roller devices 7, and the structure of roller devices 7 refers to Fig. 6,7.Roller devices 7 comprises a roller bearing 11, and roller bearing 11 is connected with upper and lower plate, and fixes with nut, bolt 12.Roller bearing 11 is outer is arranged with two rollers 17, and one of them roller is between upper plate 8 and middle plate 9, and another roller is between middle plate 9 and lower plate 10.Between upper, middle plate and between middle plate and lower plate, be welded with the supporting plate 13 that thickness is 20mm, and described upper, middle and lower plate is welded on anchor plate 14, anchor plate 14 adopts bolts 16 to be connected to the blocking plate 15 of pole, whole stable system and firm.Between roller and roller bearing, reach roller surface and be coated with the lubricity that one deck lubrication oil can further add big roller.
Pole termination roller design and making are as shown in Figure 6,7.
The unitary construction of fish belly sill system all adopts existing general structure, not in current utility model scope.Anchor plate: choose the approximately steel plate of 12 ~ 18mm of thickness, planar dimension is about 300 ~ 350*300 ~ 350mm, by high-strength bolt, with the blocking plate of pole, is connected.Other requirements as for anchor plate can be consistent with blocking plate, therefore can directly utilize engineering or on-the-spot steel plate, draws materials conveniently.
The upper, middle and lower plate: choosing thickness, to be about 10 ~ 12mm thick, and planar dimension is about the steel plate of 300*300mm, in end and anchor plate welding.In the perforate of roller bearing place, opening diameter can be determined according to roller size commonly used, should meet the requirement of strength after prestress wire stretch-draw puts in place, can meet again the requirement of strength of steel plate itself.Consider that when the fish belly sill span was larger, steel strand were many, inhomogeneous stressed for avoiding depression bar, steel strand can be evenly arranged on roller bearing up and down, for ease of controlling, the middle plate that equates with upper and lower board size are set.Simultaneously, roller is made the spill of circular arc type, can make prestress wire in the middle of trend, move after stressed, has avoided steel strand to arrange problem at random, the pole eccentric compression, prevents the depression bar unbalance stress, causes Out-Plane Stability Problems.
Supporting plate: choose the steel plate that thickness is 18 ~ 22mm, the vertical layout, its planar dimension should reach the roller bearing center, upper following and upper, in and in, between lower plate apart from definite.According to fish belly sill system commonly used at present, the high 120*135mm that is about of long *.The length of supporting plate mainly is subject to the position of steel strand or the global shape of fish belly sill is determined.Apart from anchor plate edge 10mm, place two, upper following and plate firm welding, near limit and the anchor plate welding of anchor plate one side.Whole system good integrity, intensity is high, can guarantee the requirement of strength of system after prestress application.
Roller: the size of roller bearing should be definite according to the total pulling force across footpath or steel strand of fish belly sill, and upper and lower section of roller bearing is adopted bolt to fix, also can adopt the pin of some strength.The section of roller is the arc (as shown in Figure 7) of indent, and the gap of 1 ~ 2mm is arranged between roller bearing, and the contact surface between roller and roller bearing should polish smooth, and is beneficial to the rolling of pulley.The whole external surfaces of roller should scribble lubrication oil, guarantee that roller rolls more smooth and easy.
The utility model has the advantage of:
1, roller sways under stressing conditions, at prestress wire, apply in process the situation that not there will be steel strand and the sharp-pointed friction of the pole blocking plate arm of angle, avoided the phenomenon such as wearing and tearing, fracture of wire of steel strand, further guaranteed the safety of structure, the recoverable rate is high simultaneously, meets the theory of environmental protection, economy.
2, the mechanism design good stability of whole roller bearing, intensity is high.
But 3, roller system prefabrication, on-site consolidation gets final product, and assembled speed is fast, and precision is controlled high.
4, the roller external surface is the design of indent arc, and steel strand will be concentrated to centre under stressing conditions, can avoid steel strand to scatter, and causes the fish belly sill Out-Plane Stability Problems.
Claims (9)
1. a prestressing force fish belly sill supports the pole termination, it is characterized in that, on the top of the support pole of fish belly sill, roller devices is installed.
2. by fish belly sill claimed in claim 1, support the pole termination, it is characterized in that: described roller devices comprises upper plate and the lower plate that be arranged in parallel, described upper and lower plate has the roller bearing hole, in the roller bearing hole of upper and lower plate, is equipped with a roller bearing, and on described roller bearing, cover has roller.
3. by fish belly sill claimed in claim 2, support the pole termination, it is characterized in that: between upper plate and lower plate, also be provided with middle plate, between upper plate and middle plate, establish a roller, between middle plate and lower plate, establish a roller.
4. by the described fish belly sill of claim 2 or 3, support the pole termination, it is characterized in that: the external surface of roller is the smooth arc-shaped surface of indent.
5. by the described fish belly sill of claim 2 or 3, support the pole termination, it is characterized in that: the roller external diameter is 80 ~ 120mm, and between roller and roller bearing, spacing is 1 ~ 2mm, and the radius of curvature of the inner concave arc surface of roller external surface is 220 ~ 280mm.
6. by fish belly sill claimed in claim 3, support the pole termination, it is characterized in that: this roller devices adopts anchor plate to be connected with the blocking plate that fish belly sill supports the pole top.
7. by fish belly sill claimed in claim 6, support the pole termination, it is characterized in that: upper plate, middle plate and lower plate thickness are 10 ~ 12mm, planar dimension 25*25 ~ 35*35cm, and upper plate, middle plate and lower plate and anchor plate adopt and are welded to connect.
8. by fish belly sill claimed in claim 6, support the pole termination, it is characterized in that: between upper plate and middle plate and middle plate and lower plate, in the roller both sides, be welded with respectively a supporting plate, with the upper, middle and lower plate, form a firm integral body.
9. by fish belly sill claimed in claim 8, support the pole termination, it is characterized in that: described supporting plate adopts the steel plate of the thick 18 ~ 22mm of being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320186123XU CN203296051U (en) | 2013-04-15 | 2013-04-15 | Prestress fish belly sill supporting strut end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320186123XU CN203296051U (en) | 2013-04-15 | 2013-04-15 | Prestress fish belly sill supporting strut end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203296051U true CN203296051U (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320186123XU Expired - Fee Related CN203296051U (en) | 2013-04-15 | 2013-04-15 | Prestress fish belly sill supporting strut end |
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| CN (1) | CN203296051U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612113A (en) * | 2018-06-01 | 2018-10-02 | 中铁二院昆明勘察设计研究院有限责任公司 | A kind of foundation pit arch pre-loaded support struts structure and support system |
| CN109235771A (en) * | 2018-11-16 | 2019-01-18 | 中建二局安装工程有限公司 | A kind of recessed fish-bellied type combination light truss structure of large span and its installation method |
| CN110080239A (en) * | 2019-04-19 | 2019-08-02 | 中国建筑第二工程局有限公司 | Adjusting seat, fish belly sill system and the construction method of fish belly sill steel strand wires and support beam |
-
2013
- 2013-04-15 CN CN201320186123XU patent/CN203296051U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612113A (en) * | 2018-06-01 | 2018-10-02 | 中铁二院昆明勘察设计研究院有限责任公司 | A kind of foundation pit arch pre-loaded support struts structure and support system |
| CN108612113B (en) * | 2018-06-01 | 2020-03-13 | 中铁二院昆明勘察设计研究院有限责任公司 | Foundation pit arch prestress supporting structure and supporting system |
| CN109235771A (en) * | 2018-11-16 | 2019-01-18 | 中建二局安装工程有限公司 | A kind of recessed fish-bellied type combination light truss structure of large span and its installation method |
| CN110080239A (en) * | 2019-04-19 | 2019-08-02 | 中国建筑第二工程局有限公司 | Adjusting seat, fish belly sill system and the construction method of fish belly sill steel strand wires and support beam |
| CN110080239B (en) * | 2019-04-19 | 2024-03-01 | 中国建筑第二工程局有限公司 | Adjusting seat for steel strands and bracing beams of fish web beam, fish web beam system and construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20210415 |
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| CF01 | Termination of patent right due to non-payment of annual fee |