CN107237248A - A kind of bridge lateral prestress system using single large-diameter steel strand - Google Patents
A kind of bridge lateral prestress system using single large-diameter steel strand Download PDFInfo
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- CN107237248A CN107237248A CN201710506157.5A CN201710506157A CN107237248A CN 107237248 A CN107237248 A CN 107237248A CN 201710506157 A CN201710506157 A CN 201710506157A CN 107237248 A CN107237248 A CN 107237248A
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- steel strand
- diameter steel
- steel wire
- corrugated pipe
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
- E01D2101/32—Metal prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of bridge lateral prestress system using single large-diameter steel strand, including circle corrugated pipe（5）, circle corrugated pipe（5）Inside it is equipped with large-diameter steel strand（1）, circle corrugated pipe（5）With anchor plate（4）It is connected, anchor plate（4）Away from circle corrugated pipe（5）One end be provided with anchor slab（3）, anchor slab（3）Inside it is provided with work clip sheet（2）, work clip sheet（2）Clamp large-diameter steel strand（1）；Large-diameter steel strand（1）Including interior steel wire floor from inside to outside（11）, process wire layer（12）With outer steel wire floor（13）, the interior steel wire floor（11）, process wire layer（12）With outer steel wire floor（13）Close connection, the large-diameter steel strand is formed by twisting（1）.A kind of bridge lateral prestress system using single large-diameter steel strand of the present invention, high efficiency, construction is convenient and loss of prestress is smaller, and applicability improves a lot.
Description
Technical field
The present invention relates to a kind of bridge lateral prestress system, and in particular to a kind of bridge using single large-diameter steel strand
Beam transverse prestress system, belongs to technical field of bridge engineering.
Background technology
In the lateral stressed analysis of box beam top plate, transverse prestress is to suppress the principal element that crack is produced.Exist at present
Science of bridge building circle of China, box beam top plate transverse prestress uses 3~5 beam ΦSThe steel beam and flat anchor of 15.2 steel strand wires composition
Anchoring system.In site operation, using single hole stretch-draw jack gradation tensioning transverse prestress beam, the construction method is easily made
Into tensioning, time-consuming, occurs with the larger situation of effective prestress dispersion under the anchor of hole, meanwhile, anchor mouthful friction loss is big, mud jacking
The problems such as being difficult to closely knit also more protrudes, and its consequence is that effective prestress loss is big under anchor, and top plate occurs under crack, construction quality
Drop.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high efficiency, construction is convenient and loss of prestress is smaller, is applicable
The bridge lateral prestress system for the single large-diameter steel strand of use that property improves a lot.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of bridge lateral prestress system using single large-diameter steel strand, it is characterised in that：Including circular wave
Large-diameter steel strand is equipped with pipe, the circle corrugated pipe, the circle corrugated pipe is connected with anchor plate, the anchor pad
The one end of plate away from the circle corrugated pipe, which is provided with anchor slab, the anchor slab, is provided with work clip sheet, the work clip sheet folder
State large-diameter steel strand in residence；The large-diameter steel strand includes interior steel wire floor, process wire layer and outer steel wire from inside to outside
Layer, the interior steel wire floor, process wire layer and outer steel wire floor are closely connected, and the large-diameter steel strand is formed by twisting.
The interior steel wire floor is single 1 steel wire, process wire layer by being constituted for 9 diameter identical steel wires,
The outer steel wire floor is made up of 9 diameter identical steel wires.
The interior steel wire floor is single 1 steel wire, and the process wire layer is made up of 6 diameter identical steel wires, institute
The steel wire arranged for interval for stating two kinds of different sizes that outer steel wire floor is respectively 6 by number is constituted.
The large-diameter steel strand uses the form of horizontal straight line cloth beam.
The large-diameter steel strand is in box beam top plate transverse direction using alternately one-end tension anchoring.
Spacing between two adjacent large-diameter steel strands is set to 0.4m~0.6m.
The circle corrugated pipe outside the junction of the anchor plate with being arranged with spiral bar, one end of the spiral bar and institute
The end face for stating anchor plate coordinates, and the other end is set on the circle corrugated pipe.
A diameter of 10cm~14cm of the spiral bar.
A diameter of 30mm~50mm of the circle corrugated pipe.
Beneficial effects of the present invention：A kind of bridge lateral prestressing force body for single large-diameter steel strand that the present invention is provided
System, large-diameter steel strand includes interior steel wire floor, process wire layer and outer steel wire floor from inside to outside, interior steel wire floor, process wire
Layer and outer steel wire floor are closely connected, and form the large-diameter steel strand by twisting, relative to traditional flat anchor technique, there is as follows
Some advantage：1st, it can be obtained on the sectional area for calculating steel strand wires, single large-diameter steel strand can be while raw material be saved
Increase economic efficiency, 2, using single large-diameter steel strand, compared to 3~5 traditional beam ΦSThe steel beam of 15.2 steel strand wires composition
And flat anchor anchoring system, can significantly reduce tensioning number of times, save man-hour, 3, steel strand tension number of times reduce, anchor mouthful frictional resistance
Loss is smaller, and effective prestress is larger, and transverse prestress loss reduces, and tensioning efficiency is higher, can preferably suppress foig
Generation, 4, to single large-diameter steel strand mud jacking, duct grouting compactness is preferable.
Brief description of the drawings
Fig. 1 is the structural representation of large-diameter steel strand in the embodiment of the present invention 1；
Fig. 2 is the structural representation of large-diameter steel strand in the embodiment of the present invention 2；
Fig. 3 is the structural representation of anchorage in the present invention；
Fig. 4 is the left view of anchorage in the present invention；
Fig. 5 is large-diameter steel strand in the present invention along box beam top plate lateral arrangement schematic diagram；
The three-dimensional structure diagram that Fig. 6 installs for spiral bar in the present invention；
The profile that Fig. 7 installs for spiral bar in the present invention；
Fig. 8 is the structural representation of spiral bar in the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings, and following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
Embodiment 1
As shown in Figure 3 and Figure 4, a kind of bridge lateral prestress system using single large-diameter steel strand, anchorage is by work
Make intermediate plate 2, anchor slab 3 and anchor plate 4 to constitute, supported the use with large-diameter steel strand 1.Major diameter is equipped with circle corrugated pipe 5
Steel strand wires 1, circle corrugated pipe 5 is connected with anchor plate 4, and the one end of anchor plate 4 away from circle corrugated pipe 5 is provided with anchor slab 3,
It is provided with anchor slab 3 after work clip sheet 2, the complete large-diameter steel strand 1 of tensioning, work clip sheet 2 clamps the large-diameter steel strand 1.
A diameter of 30mm~50mm of circle corrugated pipe 5, preferably 40mm.Prestressing force is delivered on anchor plate 4 by anchor slab 3, entered
And apply transverse prestress in whole box beam.Transversely prestressed bars are positioned by circle corrugated pipe 5, after the completion of tensioning in duct
Grouting.
As shown in figure 1, large-diameter steel strand 1 includes interior steel wire floor 11, process wire layer 12 and outer steel wire from inside to outside
Layer 13, interior steel wire floor 11, process wire layer 12 and outer steel wire floor 13 are closely connected, and pass through twisting formation large-diameter steel strand 1.It is interior
Steel wire floor 11 is single 1 steel wire, a diameter of 6mm；Process wire layer 12 for 9 diameter identical steel wires by constituting, diameter
For 4mm；Outer steel wire floor 13 is made up of 9 diameter identical steel wires, a diameter of 5mm.The nominal diameter of the large-diameter steel strand 1 is
21.8mm, nominal area of section is 318mm2。
Large-diameter steel strand 1 uses the form of horizontal straight line cloth beam, can not only reduce the pre- of generation because of bending and answer
Power is lost, moreover it is possible to reduce and the error that bellows is brought is bent in work progress, simplifies working procedure.
As shown in figure 5, large-diameter steel strand 1 is anchored in box beam top plate transverse direction using alternately one-end tension.In the present invention,
Using single steel strand wires, corresponding to a transverse prestress, the spacing of the transverse prestress Large-diameter Steel adjacent with two is twisted
The spacing of line is equal, and the spacing between two adjacent large-diameter steel strands 1 is set to 0.4m~0.6m, after optimization is calculated
It is defined as 0.4m.
As shown in Figure 6 and Figure 7, in order to which the power on anchor plate 4 is reasonably passed in box beam, spiral shell is set after anchor plate 4
Revolve shape reinforcing bar 6.Circle corrugated pipe 5 is with being arranged with spiral bar 6, one end and the anchor plate 4 of spiral bar 6 outside the junction of anchor plate 4
End face coordinate, the other end is set on circle corrugated pipe 5.As shown in figure 8, a diameter of 10cm~14cm of spiral bar 6, preferably
For 12cm.The spacing of spiral bar 6 is set to 5cm, and overall length is 304cm.
Embodiment 2
As shown in Figure 3 and Figure 4, a kind of bridge lateral prestress system using single large-diameter steel strand, anchorage is by work
Make intermediate plate 2, anchor slab 3 and anchor plate 4 to constitute, supported the use with large-diameter steel strand 1.Major diameter is equipped with circle corrugated pipe 5
Steel strand wires 1, circle corrugated pipe 5 is connected with anchor plate 4, and the one end of anchor plate 4 away from circle corrugated pipe 5 is provided with anchor slab 3,
It is provided with anchor slab 3 after work clip sheet 2, the complete large-diameter steel strand 1 of tensioning, work clip sheet 2 clamps the large-diameter steel strand 1.
A diameter of 30mm~50mm of circle corrugated pipe 5, preferably 40mm.Prestressing force is delivered on anchor plate 4 by anchor slab 3, entered
And apply transverse prestress in whole box beam.Transversely prestressed bars are positioned by circle corrugated pipe 5, after the completion of tensioning in duct
Grouting.
As shown in Fig. 2 large-diameter steel strand 1 includes interior steel wire floor 11, process wire layer 12 and outer steel wire from inside to outside
Layer 13, interior steel wire floor 11, process wire layer 12 and outer steel wire floor 13 are closely connected, and pass through twisting formation large-diameter steel strand 1.It is interior
Steel wire floor 11 is single 1 steel wire, a diameter of 6mm；Process wire layer 12 for 6 diameter identical steel wires by constituting, diameter
For 6mm；Outer steel wire floor 13 is respectively that the steel wire arranged for interval of two kinds of different sizes of 6 is constituted by number, and diameter is respectively 5mm
And 7mm.The nominal diameter of the large-diameter steel strand 1 is 28.6mm, and nominal area of section is 546mm2。
Large-diameter steel strand 1 uses the form of horizontal straight line cloth beam, can not only reduce the pre- of generation because of bending and answer
Power is lost, moreover it is possible to reduce and the error that bellows is brought is bent in work progress, simplifies working procedure.
As shown in figure 5, large-diameter steel strand 1 is anchored in box beam top plate transverse direction using alternately one-end tension.In the present invention,
Using single steel strand wires, corresponding to a transverse prestress, the spacing of the transverse prestress Large-diameter Steel adjacent with two is twisted
The spacing of line is equal, and the spacing between two adjacent large-diameter steel strands 1 is set to 0.4m~0.6m, after optimization is calculated
It is defined as 0.4m.
As shown in Figure 6 and Figure 7, in order to which the power on anchor plate 4 is reasonably passed in box beam, spiral shell is set after anchor plate 4
Revolve shape reinforcing bar 6.Circle corrugated pipe 5 is with being arranged with spiral bar 6, one end and the anchor plate 4 of spiral bar 6 outside the junction of anchor plate 4
End face coordinate, the other end is set on circle corrugated pipe 5.As shown in figure 8, a diameter of 10cm~14cm of spiral bar 6, preferably
For 12cm.The spacing of spiral bar 6 is set to 5cm, and overall length is 304cm.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of bridge lateral prestress system using single large-diameter steel strand, it is characterised in that：Including circle corrugated pipe
（5）, the circle corrugated pipe（5）Inside it is equipped with large-diameter steel strand（1）, the circle corrugated pipe（5）With anchor plate（4）Connection
It is fixed, the anchor plate（4）Away from the circle corrugated pipe（5）One end be provided with anchor slab（3）, the anchor slab（3）It is interior to set
There is work clip sheet（2）, the work clip sheet（2）Clamp the large-diameter steel strand（1）；The large-diameter steel strand（1）Including
Interior steel wire floor from inside to outside（11）, process wire layer（12）With outer steel wire floor（13）, the interior steel wire floor（11）, process wire
Layer（12）With outer steel wire floor（13）Close connection, the large-diameter steel strand is formed by twisting（1）.
2. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The interior steel wire floor（11）For single 1 steel wire, the process wire layer（12）By for 9 diameter identical steel wires
Composition, the outer steel wire floor（13）It is made up of 9 diameter identical steel wires.
3. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The interior steel wire floor（11）For single 1 steel wire, the process wire layer（12）By 6 diameter identical steel wire groups
Into the outer steel wire floor（13）It is respectively that the steel wire arranged for interval of two kinds of different sizes of 6 is constituted by number.
4. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The large-diameter steel strand（1）Using the form of horizontal straight line cloth beam.
5. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The large-diameter steel strand（1）Using alternately one-end tension anchoring in box beam top plate transverse direction.
6. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 5, its feature
It is：Two adjacent large-diameter steel strands（1）Between spacing be set to 0.4m ~ 0.6m.
7. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The circle corrugated pipe（5）With the anchor plate（4）Junction outside be arranged with spiral bar（6）, the spiral bar（6）
One end and the anchor plate（4）End face coordinate, the other end is set in the circle corrugated pipe（5）On.
8. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 7, its feature
It is：The spiral bar（6）A diameter of 10cm~14cm.
9. a kind of bridge lateral prestress system using single large-diameter steel strand according to claim 1, its feature
It is：The circle corrugated pipe（5）A diameter of 30mm~50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710506157.5A CN107237248A (en) | 2017-06-28 | 2017-06-28 | A kind of bridge lateral prestress system using single large-diameter steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710506157.5A CN107237248A (en) | 2017-06-28 | 2017-06-28 | A kind of bridge lateral prestress system using single large-diameter steel strand |
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| CN107237248A true CN107237248A (en) | 2017-10-10 |
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| CN201710506157.5A Pending CN107237248A (en) | 2017-06-28 | 2017-06-28 | A kind of bridge lateral prestress system using single large-diameter steel strand |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084920A (en) * | 1992-09-29 | 1994-04-06 | 上海市基础工程公司 | Sheet clamping type group anchor cable and mounting method |
| WO1998041709A1 (en) * | 1997-03-17 | 1998-09-24 | Suspa Spannbeton Gmbh | Anchoring device for a tension member, especially for use in prestressed concrete constructions |
| CN101215822A (en) * | 2008-01-08 | 2008-07-09 | 中交第二公路勘察设计研究院有限公司 | Method and device for anchoring changeable prestressing force of suspension bridge |
| CN202706578U (en) * | 2012-08-13 | 2013-01-30 | 李钟声 | Insulating type pre-stressed anchoring tool for concrete pre-stressed tension |
| CN204662781U (en) * | 2015-05-21 | 2015-09-23 | 北京兆福基建材科技发展有限公司 | A kind of major diameter delayed bonding prestressed tendon |
-
2017
- 2017-06-28 CN CN201710506157.5A patent/CN107237248A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084920A (en) * | 1992-09-29 | 1994-04-06 | 上海市基础工程公司 | Sheet clamping type group anchor cable and mounting method |
| WO1998041709A1 (en) * | 1997-03-17 | 1998-09-24 | Suspa Spannbeton Gmbh | Anchoring device for a tension member, especially for use in prestressed concrete constructions |
| CN101215822A (en) * | 2008-01-08 | 2008-07-09 | 中交第二公路勘察设计研究院有限公司 | Method and device for anchoring changeable prestressing force of suspension bridge |
| CN202706578U (en) * | 2012-08-13 | 2013-01-30 | 李钟声 | Insulating type pre-stressed anchoring tool for concrete pre-stressed tension |
| CN204662781U (en) * | 2015-05-21 | 2015-09-23 | 北京兆福基建材科技发展有限公司 | A kind of major diameter delayed bonding prestressed tendon |
Non-Patent Citations (1)
| Title |
|---|
| 吕捷: "桥梁缓粘结预应力技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅱ辑》 * |
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Application publication date: 20171010 |