CN203603059U - Prestress steel bar thread anchorage used in cable-stayed bridge main tower - Google Patents
Prestress steel bar thread anchorage used in cable-stayed bridge main tower Download PDFInfo
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- CN203603059U CN203603059U CN201320721600.8U CN201320721600U CN203603059U CN 203603059 U CN203603059 U CN 203603059U CN 201320721600 U CN201320721600 U CN 201320721600U CN 203603059 U CN203603059 U CN 203603059U
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- Prior art keywords
- steel bar
- prestressed steel
- prestress steel
- tower
- king
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims abstract description 12
- 239000004519 grease Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 17
- 230000007547 defect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 210000003205 muscle Anatomy 0.000 description 5
- 239000004744 fabric Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 206010057855 Hypotelorism of orbit Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Abstract
The utility model discloses a prestress steel bar thread anchorage used in a cable-stayed bridge main tower and belongs to the field of cable-stayed bridge construction. The prestress steel bar thread anchorage structurally comprises prestress steel bars with the outer walls provided with protective sleeves. The prestress steel bar thread anchorage is characterized in that the prestress steel bars are distributed in a main tower body in a rectangular shape by being staggered longitudinally and horizontally, the left ends and the right ends of the prestress steel bars are provided with pre-buried anchor plates and fastening assemblies, the protective sleeves match the prestress steel bars in a sliding mode, and the left ends and the right ends of the prestress steel bars penetrate through positioning holes in the pre-buried anchor plates respectively and are fixedly connected with the main tower body through the fastening assemblies. The prestress steel bar thread anchorage used in the cable-stayed bridge main tower can overcome the defects in the prior art and have the good product performance and cost performance, the rib distribution distance is smaller, the distance between the prestress steel bar thread anchorage and the wall of a main tower is reduced, the tensile capacity and the shear capacity of the main tower body are improved, due to the anchorage with the standard size, waste of steel in construction is avoided, anchoring and tensioning in construction of the anchorage is simple, a non-bonding construction method is adopted, and the construction period is shortened.
Description
Technical field
The utility model belongs to oblique pull lock bridge construction field, is specifically related to a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower.
Background technology
At present, the horizontal and vertical presstressed reinforcing steel of oblique pull lock bridge king-tower mainly adopts fining twisted steel anchor both at home and abroad, and construction adopts bonding mode.The defect that prior art exists: fining twisted steel strength grade is low, elongation per unit length is little, anchorage stress is difficult to the problems such as control.Rebar sizes deviation is large, and construction precision is low, easily causes disconnected muscle.Construction adopts bonding mode, and 50mm duct grouting drawback is large, is in the milk unreal, and after grouting, concrete shrinkage produces gap, all can cause reinforcement corrosion to lose efficacy.The grouted-aggregate concrete coefficient of expansion that adds expansion agent is difficult to control, and easily produces swelling stress, causes tower body infant cracking.
Summary of the invention
The utility model is for solving the problems of the technologies described above, a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower is provided, replace fining twisted steel in former design, tension and the shear resistance of king-tower are improved, a large amount of rolled steel dosage that reduce, and can design thus brand-new construction method, improve safety.
For achieving the above object, the technical solution adopted in the utility model is: a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower, structure comprises that outer wall is provided with the prestressed steel bar of protective sleeve, key is: described prestressed steel bar is vertical, laterally staggered rectangular being distributed in king-tower tower body, a left side for above-mentioned prestressed steel bar, right two ends are provided with pre-buried anchor slab and fastening assembly thereof, protective sleeve and prestressed steel bar have and are slidably matched, a left side for prestressed steel bar, right two ends are passed respectively the locating hole on pre-buried anchor slab and are fixedly connected with king-tower tower body by fastening assembly.
In the utility model, prestressed steel bar screw thread ground tackle can solve the defect existing in prior art, there is excellent properties of product, higher cost performance, cloth muscle spacing is less, shorten the distance with king-tower tower wall, tension and the shear resistance of king-tower tower body are improved, standard size anchoring avoid the waste of steel in construction, construction anchoring tension operation simple, without bonding form of construction work, shorten construction period.
Illustrate: the longitudinal cloth muscle of JL32 fining twisted steel spacing is 20cm, be 50cm apart from the distance of tower wall, and adopt after φ 16 prestressed steel bars, the hypotelorism of cloth muscle is 7.5cm, be 47.5cm apart from the Distance Shortened of tower wall, presstressed reinforcing steel is arranged compacter, reduced space hold, and improved the shear resistance of longitudinal prestressing muscle in king-tower after adopting prestressed steel bar.
JL32 fining twisted steel structure needs reserving hole channel, and channel diameter is greater than 50mm, takes up room large, when construction, steel mesh reinforcement needs shift position, and prestressed steel bar screw thread ground tackle adopts without bonding mode, rod iron is 18mm without bonding outer diameter sheath dimension, takies structure space little.Following table is the Contrast on effect that uses two kinds of structures:
Wherein, the first hurdle is the prestressed steel bar screw thread ground tackle that uses the prestressed steel bar that diameter is 16mm, and the second hurdle is for using JL32 fining twisted steel structure.
From table, we can find out, the nominal bearing capacity of 3 φ 16 prestressed steel bars is suitable with the nominal bearing capacity of single JL32 fining twisted steel, below our stretch-draw safety and the saving steels amount of calculating respectively both contrast.
(1) safety
Fining twisted steel stretch-draw safety factor=829.57KN/568.2KN=1.46,
Prestressed steel bar stretch-draw safety factor=285.42KN/189.4KN=1.51;
(2) rolled steel dosage
With saving steels amount under bearing capacity=(6650g-1578g × 3)/6650g=28.8%.
For convenience of construction, fining twisted steel when construction cutting length need grow 40mm than design length, and press design length blanking when prestressed steel bar blanking, therefore adopt prestressed steel bar to construct and at least can save 28.8% steel.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that in the utility model, fastening assembly is connected with pre-buried anchor slab, rod iron.
In figure, 1 represents oblique pull lock bridge king-tower, and 3A represents protective sleeve, and 3B represents prestressed steel bar, and 4 represent pre-buried anchor slab, and 4A represents spiral bar, and 5 represent fastening assembly, and 5A represents anchoring nut.
In Fig. 1, owing to showing overall structure, both are closely connected pre-buried anchor slab 4 and fastening assembly 5, badly in the drawings clearly show, but in Fig. 2, have detailed content.
The specific embodiment
A kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower; structure comprises that outer wall is provided with the prestressed steel bar 3B of protective sleeve 3A; importantly: described prestressed steel bar 3B vertical, horizontal rectangular being distributed in king-tower tower body 1 of interlocking; the left and right two ends of above-mentioned prestressed steel bar 3B are provided with pre-buried anchor slab 4 and fastening assembly 5 thereof; protective sleeve 3A and prestressed steel bar 3B have and are slidably matched, and the left and right two ends of prestressed steel bar 3B are respectively through the locating hole on pre-buried anchor slab 4 and be fixedly connected with king-tower tower body 1 by fastening assembly 5.
The nominal diameter of described prestressed steel bar is φ 14mm～φ 40mm.
Described prestressed steel bar two ends are provided with the screw thread of different length, and the long end of thread is stretching end, and short thread end is fixed end.
Described pre-buried anchor slab 4 inner sides are with spiral bar 4A, and prestressed steel bar is spacing through spiral bar 4A and locating hole.
Described fastening assembly 5 comprises: anchoring nut 5A, prestressed steel bar end is through the spiral bar 4A on pre-buried anchor slab 4 and the locating hole on pre-buried anchor slab 4, at pre-buried anchor slab 4 opposite sides by anchoring nut 5A anchoring.
In described king-tower tower body, prestressed steel bar 3B longitudinal or horizontally set is a group or more, and prestressed steel bar 3B number longitudinal and horizontally set is identical or different.
Between described prestressed steel bar 3B and protective sleeve 3A, be provided with grease lubricant layer.
Referring to Fig. 1, the prestressed steel bar screw thread ground tackle longitudinally, laterally arranging respectively in the king-tower 1 of oblique pull lock bridge, sees rectangular distribution on the whole.The structure of prestressed steel bar screw thread ground tackle comprises that surface scribbles grease and outer wall and has the prestressed steel bar 3B of protective sleeve 3A; the pre-buried anchor slab 4 at prestressed steel bar 3B two ends; the fastening assembly 5 of prestressed steel bar on pre-buried anchor slab 4; in illustrated embodiment, in the king-tower 1 of oblique pull lock bridge, longitudinally, be laterally provided with respectively three groups of prestressed steel bar screw thread ground tackles.
Referring to Fig. 2; prestressed steel bar 3B has protective sleeve 3A outward; the fixed end of the prestressed steel bar 3 with protective sleeve and stretching end are adopted fixing in the same way; prestressed steel bar fixed end or stretching end be through the locating hole on pre-buried anchor slab 4 spiral bar 4A and pre-buried anchor slab 4 above, at pre-buried anchor slab 4 opposite sides by anchoring nut 5A anchoring.Locating hole quantity on pre-buried anchor slab 4 is one or more, in this example, has three locating holes on pre-buried anchor slab 4, in the middle of a pair of pre-buried anchor slab 4, can place three prestressed steel bar 3B.
Claims (7)
1. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower, structure comprises that outer wall is provided with the prestressed steel bar of protective sleeve (3A) (3B), it is characterized in that: described prestressed steel bar (3B) is vertical, laterally staggered rectangular being distributed in king-tower tower body (1), a left side for above-mentioned prestressed steel bar (3B), right two ends are provided with pre-buried anchor slab (4) and fastening assembly (5) thereof, protective sleeve (3A) has and is slidably matched with prestressed steel bar (3B), a left side for prestressed steel bar (3B), right two ends are passed respectively the locating hole on pre-buried anchor slab (4) and are fixedly connected with king-tower tower body (1) by fastening assembly (5).
2. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, is characterized in that: the nominal diameter of described prestressed steel bar is φ 14mm～φ 40mm.
3. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, is characterized in that: described prestressed steel bar two ends are provided with the screw thread of different length, the long end of thread is stretching end, and short thread end is fixed end.
4. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, is characterized in that: described pre-buried anchor slab (4) inner side is with spiral bar (4A), and prestressed steel bar is spacing through spiral bar (4A) and locating hole.
5. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, it is characterized in that: described fastening assembly (5) comprising: anchoring nut (5A), prestressed steel bar end is through the spiral bar (4A) on pre-buried anchor slab (4) and the locating hole on pre-buried anchor slab (4), at pre-buried anchor slab (4) opposite side by anchoring nut (5A) anchoring.
6. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, it is characterized in that: in described king-tower tower body, prestressed steel bar (3B) longitudinal or horizontally set is a group or more, and prestressed steel bar (3B) number longitudinal and horizontally set is identical or different.
7. a kind of prestressed steel bar screw thread ground tackle of using in oblique pull lock bridge king-tower according to claim 1, is characterized in that: between described prestressed steel bar (3B) and protective sleeve (3A), be provided with grease lubricant layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320721600.8U CN203603059U (en) | 2013-11-13 | 2013-11-13 | Prestress steel bar thread anchorage used in cable-stayed bridge main tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320721600.8U CN203603059U (en) | 2013-11-13 | 2013-11-13 | Prestress steel bar thread anchorage used in cable-stayed bridge main tower |
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| Publication Number | Publication Date |
|---|---|
| CN203603059U true CN203603059U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320721600.8U Expired - Lifetime CN203603059U (en) | 2013-11-13 | 2013-11-13 | Prestress steel bar thread anchorage used in cable-stayed bridge main tower |
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| Country | Link |
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| CN (1) | CN203603059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727222A (en) * | 2015-04-07 | 2015-06-24 | 林同棪国际工程咨询（中国）有限公司 | Separated steel and concrete combined cable tower anchorage zone structure |
-
2013
- 2013-11-13 CN CN201320721600.8U patent/CN203603059U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727222A (en) * | 2015-04-07 | 2015-06-24 | 林同棪国际工程咨询（中国）有限公司 | Separated steel and concrete combined cable tower anchorage zone structure |
| CN104727222B (en) * | 2015-04-07 | 2017-01-18 | 林同棪国际工程咨询（中国）有限公司 | Separated steel and concrete combined cable tower anchorage zone structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Hengshui City, Hebei Province, 053000 North Park industrial base Taocheng District Road No. 9 Patentee after: SINO RUBBER TECHNOLOGY Co.,Ltd. Address before: 053000 East Road, North Industrial Park, Hebei, Hengshui, No. 9 Patentee before: HENGSHUI RUBBER Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180212 Address after: Hengshui City, Hebei Province, 053000 North Park industrial base Taocheng District Road No. 9 Co-patentee after: HEBEI DESHENG WIREMESH CO.,LTD. Patentee after: SINO RUBBER TECHNOLOGY Co.,Ltd. Address before: Hengshui City, Hebei Province, 053000 North Park industrial base Taocheng District Road No. 9 Patentee before: SINO RUBBER TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hengshui City, Hebei Province, 053000 North Park industrial base Taocheng District Road No. 9 Co-patentee after: Tiangong Lide Technology Development Co.,Ltd. Patentee after: SINO RUBBER TECHNOLOGY Co.,Ltd. Address before: Hengshui City, Hebei Province, 053000 North Park industrial base Taocheng District Road No. 9 Co-patentee before: HEBEI DESHENG WIREMESH CO.,LTD. Patentee before: SINO RUBBER TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |