CN104018433B - A kind of bridge External prestressed cable wire turns to boots-outer tube steering gear - Google Patents
A kind of bridge External prestressed cable wire turns to boots-outer tube steering gear Download PDFInfo
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- CN104018433B CN104018433B CN201410219783.2A CN201410219783A CN104018433B CN 104018433 B CN104018433 B CN 104018433B CN 201410219783 A CN201410219783 A CN 201410219783A CN 104018433 B CN104018433 B CN 104018433B
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Abstract
The present invention relates to a kind of bridge External prestressed cable wire and turn to boots-outer tube steering gear, on the corner turn at radial support prestressed cable, comprise outer tube, turn to boots and cable wire position-limited wing; Described outer tube is connected with bridge bogie or is embedded in concrete partition; The described supporting cambered surface turning to boots to be provided with to turn to gently at radial support prestressed cable, turns to boots to be mounted and fixed in outer tube; Described cable wire position-limited wing is provided with at the two ends of outer tube.The invention has the beneficial effects as follows: adopt and turn to boots-outer tube as steering gear, compared with external prestressing cable wire transfer in the past, adopt the processing of conventional steel sheet, steel pipe, be welded, processing technology is simple, and quality is easy to control.Turn to boots lightweight, erection procedure is single, simple installation, and processing, installation cost is low.
Description
Technical field
The invention belongs to bridge engineering external prestressing constructing apparatus, particularly relate to a kind of bridge External prestressed cable wire and turn to boots-outer tube steering gear.
Background technology
External prestressing technique is widely applied in Bridge Reconstruction process, one of the most effective means in bridge strengthening construction are become, the determination of prestressed cable steering position and turn to the accurate of space angle is the effective necessary condition ensureing prestress application.Because prestressed cable stretching force is very large, if transfer designs improper, likely to cause in prestress application process the situations such as distortion, destruction, angle change, cause that cable wire external jacket destroys, Shi Hanzhang deviation is excessive, reduce the phenomenons such as application life.
Steering gear in the past adopts socket diverter structure mostly, by turning to steel pipe, passes through steel pipe and outer steel pipe forms.Turning to steel pipe---cable wire passes through therein, becomes smoother curve, bent by factory by cable wire turn-around design; Passing through steel pipe---diameter is greater than the straight tube of steering tube, and turns to steel pipe isometric.To turn to steel pipe and pass through steel pipe and be socketed, intermediate gaps is inserted epoxy mortar and is become to be integrated, and forms the straight steering tube of introversion so outward.Steering tube arranged outside outer tube, outer tube and cable wire turn to shelf or Transducers Embedded in Concrete to turn in partition wall, outside steering tube, outer sleeve inner wall parcel corrosion resistant plate, the frictional force between minimizing, realizes steering tube and freely rotates in sleeve pipe.This transfer shortcoming is complex structure, and manufacture difficulty is large, and cost is high.What turn to steel pipe bends difficulty greatly, and accuracy is difficult to ensure; Steering tube and pass through between pipe and pour into epoxy mortar, belongs to noxious material, and due to gap little, pouring quality is wayward; During prestress steel cable stretching, need steering tube to carry out longitudinal spacing, otherwise due to tensioning cable, after stretching out, steering angle change, and is likely destroyed; Weight is large, installs difficulty, particularly installs for work high above the ground, needs machinery to coordinate.
Summary of the invention
The object of the invention is to propose the technical scheme that a kind of bridge External prestressed cable wire turns to boots-outer tube steering gear.Make external prestressing cable wire transfer be easy to processing and manufacturing and installation, effective Control Engineering quality, reduce construction cost.
To achieve these goals, technical scheme of the present invention is: a kind of bridge External prestressed cable wire turns to boots-outer tube steering gear, on the corner turn at radial support prestressed cable, comprise and to be connected with bridge bogie or to be embedded in the outer tube in concrete partition; Described prestressed cable is through the endoporus of described outer tube, be provided with in the endoporus of outer tube and turn to boots, the described bearing surface turning to boots to be provided with radial support prestressed cable to turn to gently in casing tube internal hole outside, described bearing surface comprises one section of supporting cambered surface, described supporting cambered surface is along the axial bending of outer tube, and the two ends of bearing surface are arranged on the two ends of outer tube; Cable wire position-limited wing is provided with at the two ends of outer tube.
Further, in order to make outer tube have enough intensity, described outer tube is seamless steel pipe.
Further, described outer tube is the seamless steel pipe that wall thickness is not less than 8mm.
Further, turn to described in that boots comprise base plate, floor is put more energy in main put more energy into floor and side; The lateral surface of described base plate is the described bearing surface turned to gently at radial support prestressed cable, is described supporting cambered surface in the stage casing of described bearing surface, is respectively provided with one section of transition plane in smoothing junction at the two ends of supporting cambered surface; The position of whole bearing surface in described outer tube is no more than the center line of outer tube; Be provided with described master at the medial surface of base plate along the trend of the described cable wire of supporting to put more energy into floor, be provided with described side in the medial surface of base plate, the both sides of main floor of putting more energy into and put more energy into floor; The end of floor, is put more energy into along being fixedly connected with base plate in main put more energy into floor and side, and the put more energy into upper edge of floor of main put more energy into floor and side is connected with the inwall of described outer tube.
Further, in order to make wirerope turn to gently, one section of transition plane that one end of described base plate supporting cambered surface is extended is parallel transition face, the centerline parallel of described parallel transition face and described outer tube; One section of transition plane that the other end of base plate supporting cambered surface extends is corner transition face, and the angle between described corner transition face and the center line of described outer tube is the corner of prestressed cable.
Further, in order to ensure to turn to the installation of boots firm, the thickness of described base plate is not less than 16mm, and described master the put more energy into thickness of floor of floor and side of putting more energy into is not less than 16mm.
Further, put more energy between floor be provided with reinforcing rib in put more energy into floor and side of described master.
Further, comprise two blocks of wing plates at the described cable wire position-limited wing of the every one end of described outer tube, the upper end of described two blocks of wing plates is connected with the described both sides of the supporting cambered surface of boots that turn to, and the lower end of two blocks of wing plates is connected with the inwall of outer tube; Two blocks of wing plates from turn to the junction of boots to the outer expandable turning to boots.
Further, the length of boots bearing surface is turned to be greater than the length of described outer tube described in.
The invention has the beneficial effects as follows: adopt and turn to boots-outer tube as steering gear, compared with external prestressing cable wire transfer in the past, adopt the processing of conventional steel sheet, steel pipe, be welded, processing technology is simple, and quality is easy to control.Turn to boots lightweight, erection procedure is single, simple installation, and processing, installation cost is cheap.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention;
Fig. 2 is that the present invention turns to boots broken away view;
Fig. 3 is the B direction view of Fig. 2, is to turn to boots bearing surface view;
Fig. 4 is that the present invention turns to boots structure chart;
Fig. 5 is steering gear broken away view of the present invention;
Fig. 6 is scheme of installation of the present invention.
Detailed description of the invention
External prestressing is one of a kind of effective method of the old bridge of reinforcement and strengthening, its know-why is at Bridge Beam portion outer setting prestressed cable, through stretch-draw cable wire, to beam body Shi Hanzhang, adjustment beam body pre-stressed state, reaches the object improving bridge functional performance.In order to prestressing force is passed to beam body, the bogie that transmits stress to being set or turning to dividing plate beam body is external, simultaneously by changing cable wire direction, rationally realizing the reasonable distribution of newly-increased prestressing force at beam body.
The transformation in cable wire direction, must ensure its gentle transition, and while guarantee cable wire angle, can not cause cable wire bending damage when Shi Hanzhang, be rationally delivered on turning rack by prestressing force simultaneously, cable wire steering gear is exactly the device realizing this function.
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of bridge External prestressed cable wire turns to boots-outer tube steering gear, on the corner turns at radial support prestressed cable, comprises and to be connected with bridge bogie or to be embedded in the outer tube 10 in concrete partition; Described prestressed cable is through the endoporus of described outer tube, be provided with in the endoporus of outer tube and turn to boots 20, the described boots that turn to are provided with the bearing surface turned to gently in radial support prestressed cable outside casing tube internal hole, described bearing surface comprises one section of supporting cambered surface, described supporting cambered surface is along the axial bending of outer tube, namely support the axis 11 of center line 21f perpendicular to outer tube of cambered surface, the two ends of bearing surface are arranged on the two ends of outer tube; Cable wire position-limited wing 30 is provided with at the two ends of outer tube.
Described outer tube is the seamless steel pipe that wall thickness is not less than 8mm.
Describedly turn to that boots comprise base plate 21, floor 23 is put more energy in main put more energy into floor 22 and side; The lateral surface of described base plate is the described bearing surface turned to gently at radial support prestressed cable, described supporting cambered surface 21a in the stage casing of described bearing surface, respectively be provided with one section of transition plane in smoothing junction at the two ends of supporting cambered surface, i.e. the transition plane of described smooth connection is the plane tangent with supporting cambered surface; In order on the position being positioned at cable wire corner that enables to turn to boots stable, the position of whole bearing surface in described outer tube is no more than the center line of outer tube; Be provided with described master at the medial surface of base plate along the trend of the described cable wire of supporting to put more energy into floor, be provided with described side in the medial surface of base plate, the both sides of main floor of putting more energy into and put more energy into floor; The end of floor, is put more energy into along being fixedly connected with base plate in main put more energy into floor and side, on main floor of putting more energy into along 22a and side put more energy into floor on be connected along 23a with the inwall of described outer tube.
A kind of design scheme that base plate can adopt is: one section of transition plane that one end that described base plate supports cambered surface is extended is the centerline parallel of parallel transition face 21b, described parallel transition face and described outer tube; The section transition plane that the other end of base plate supporting cambered surface extends one is corner transition face 21c, and the included angle A 1 between described corner transition face and the center line of described outer tube equals to support included angle A 0 corresponding to the arc section of cambered surface; Also be the corner of prestressed cable.
The thickness of described base plate is not less than 16mm, and described master the put more energy into thickness of floor of floor and side of putting more energy into is not less than 16mm.
Put more energy between floor be provided with reinforcing rib 24 in put more energy into floor and side of described master.
Comprise two blocks of wing plates at the described cable wire position-limited wing of the every one end of described outer tube, the upper end of described two blocks of wing plates is connected with the described both sides of the supporting cambered surface of boots that turn to, and the lower end of two blocks of wing plates is connected with the inwall of outer tube; Two blocks of wing plates from turn to the junction of boots to the outer expandable turning to boots.
The described length turning to the length of boots bearing surface to be greater than described outer tube.Usual employing turns to boots bearing surface length to be greater than outer tube length 20mm.
Namely the angle that the arc section of described supporting cambered surface is corresponding is the corner that bridge External prestressed cable wire of the present invention turns to boots-outer tube steering gear that prestressed cable can be made to produce.The angle corresponding to arc section of supporting cambered surface is for being not more than 40 °.
The arc radius of base plate supporting cambered surface is relevant to the diameter of prestressed cable, and root prestressed cable job specfication is determined.When prestressed cable corner strengthens, the internal diameter of outer tube can be strengthened, reduce to turn to the length of boots base plate.The length of usual outer tube is 500mm ~ 800mm.
Embodiment one:
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of bridge External prestressed cable wire turns to boots-outer tube steering gear, on the corner turns at radial support prestressed cable, and cable wire hard-over is 15 °.Comprise outer tube 10, turn to boots 20 and cable wire position-limited wing 30.
The internal diameter of described outer tube is 250mm seamless steel pipe, and thickness is 8mm, length L1=800mm; Outer tube is connected with bridge bogie.
Describedly turn to that boots comprise base plate 21, floor 23 is put more energy in main put more energy into floor 22 and side.The lateral surface of described base plate is the described bearing surface turned to gently at radial support prestressed cable, described supporting cambered surface 21a in the stage casing of described bearing surface, the arc radius R=2250mm of supporting cambered surface, the angle supporting cambered surface corresponding is A0=15 °, the length L2=820mm of base plate, the thickness of base plate is 18mm; Parallel transition face 21b is extended, the centerline parallel of parallel transition face and described outer tube in one end of described base plate supporting cambered surface, and parallel transition face is to the distance D=15mm of outer tube center line; Align with the termination of outer tube in the termination of parallel transition face; The other end of base plate supporting cambered surface extends corner transition face 21c, and the included angle A 1 between corner transition face and the center line of described outer tube equals to support included angle A 0 corresponding to the arc section of cambered surface, is namely the corner of prestressed cable; The termination of outer tube is stretched out in the termination of angle transition face.Be provided with described master at the medial surface 21d of base plate along the trend (as Fig. 2, line 21e) of supporting cable wire to put more energy into floor, the thickness of main floor of putting more energy into is 18mm; Be provided with described side to put more energy into floor in the medial surface of base plate, the both sides of main floor of putting more energy into, the put more energy into thickness of floor of side is 18mm; On main floor of putting more energy into along 22a and side put more energy into floor on process along 23a by the Curve Design of outer sleeve inner wall, guarantee contacts closely connected with outer tube.The put more energy into end of floor of main put more energy into floor and side, connects along welding with base plate.
Put more energy between floor be provided with many reinforcing ribs 24 in put more energy into floor and side of described master.In the present embodiment, the reinforcing bar of described reinforcing rib to be diameter be 20mm, to put more energy between floor and are provided with 4 reinforcing ribs in main put more energy into floor and two sides, the spacing between adjacent said rib is 150mm.
As Fig. 5, Fig. 6, described a kind of bridge External prestressed cable wire turns to boots-outer tube steering gear mounting method as follows:
Outer tube is installed on bridge bogie or is embedded in concrete partition.
Turn to boots to penetrate in outer tube, on main floor of putting more energy into along 22a and side put more energy into floor on along the contact internal walls of 23a and outer tube; Align with one end of outer tube in the one end (as Fig. 6,20a) being provided with parallel transition face, the other end of outer tube is stretched out in the one end (as Fig. 6,20b) being provided with corner transition face.
After boots being turned to accurately to locate according to stress cable wire moving towards on the corner, master put more energy into floor and side floor of putting more energy into welds in contact site, two ends with outer sleeve inner wall, ensures to turn to firm fixing, the outer tube of boots to become firmly entirety with turning to boot-shaped.
Because the position of whole bearing surface in outer tube is no more than the center line of outer tube, carrying out in the process turning to boots to locate, avoiding the direction turning to boots to reverse.
In described outer tube every one end, cable wire position-limited wing is installed; The cable wire position-limited wing often held comprises two blocks of wing plates, and the upper end of two blocks of wing plates is welded with the described both sides of the supporting cambered surface of boots that turn to, and the lower end of two blocks of wing plates is welded with the inwall of outer tube; Two blocks of wing plates from turn to the junction of boots to the outer expandable turning to boots.
By cable wire 40 through outer tube, turn to the supporting cambered surface of boots to be pressed on cable wire, make cable wire produce the corner of 15 °.
Claims (8)
1. bridge External prestressed cable wire turns to boots-outer tube steering gear, on the corner turns at radial support prestressed cable, comprises and to be connected with bridge bogie or to be embedded in the outer tube in concrete partition; It is characterized in that, described prestressed cable is through the endoporus of described outer tube, be provided with in the endoporus of outer tube and turn to boots, the described bearing surface turning to boots to be provided with radial support prestressed cable to turn to gently in casing tube internal hole outside, described bearing surface comprises one section of supporting cambered surface, described supporting cambered surface is along the axial bending of outer tube, and the two ends of bearing surface are arranged on the two ends of outer tube; Cable wire position-limited wing is provided with at the two ends of outer tube;
Describedly turn to that boots comprise base plate, floor is put more energy in main put more energy into floor and side; The lateral surface of described base plate is the described bearing surface turned to gently at radial support prestressed cable, is described supporting cambered surface in the stage casing of described bearing surface, is respectively provided with one section of transition plane in smoothing junction at the two ends of supporting cambered surface; The position of whole bearing surface in described outer tube is no more than the center line of outer tube; Be provided with described master at the medial surface of base plate along the trend of the described cable wire of supporting to put more energy into floor, be provided with described side in the medial surface of base plate, the both sides of main floor of putting more energy into and put more energy into floor; The end of floor, is put more energy into along being fixedly connected with base plate in main put more energy into floor and side, and the put more energy into upper edge of floor of main put more energy into floor and side is connected with the inwall of described outer tube.
2. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, and it is characterized in that, described outer tube is seamless steel pipe.
3. a kind of bridge External prestressed cable wire according to claim 2 turns to boots-outer tube steering gear, and it is characterized in that, described outer tube is the seamless steel pipe that wall thickness is not less than 8mm.
4. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, it is characterized in that, one section of transition plane that one end of described base plate supporting cambered surface is extended is parallel transition face, the centerline parallel of described parallel transition face and described outer tube; One section of transition plane that the other end of base plate supporting cambered surface extends is corner transition face, and the angle between described corner transition face and the center line of described outer tube is the corner of prestressed cable.
5. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, and it is characterized in that, the thickness of described base plate is not less than 16mm, and described master the put more energy into thickness of floor of floor and side of putting more energy into is not less than 16mm.
6. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, it is characterized in that, puts more energy between floor be provided with reinforcing rib in put more energy into floor and side of described master.
7. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, it is characterized in that, two blocks of wing plates are comprised at the described cable wire position-limited wing of the every one end of described outer tube, the upper end of described two blocks of wing plates is connected with the described both sides of the supporting cambered surface of boots that turn to, and the lower end of two blocks of wing plates is connected with the inwall of outer tube; Two blocks of wing plates from turn to the junction of boots to the outer expandable turning to boots.
8. a kind of bridge External prestressed cable wire according to claim 1 turns to boots-outer tube steering gear, it is characterized in that, described in turn to the length of boots bearing surface to be greater than the length of described outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219783.2A CN104018433B (en) | 2014-05-23 | 2014-05-23 | A kind of bridge External prestressed cable wire turns to boots-outer tube steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219783.2A CN104018433B (en) | 2014-05-23 | 2014-05-23 | A kind of bridge External prestressed cable wire turns to boots-outer tube steering gear |
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| Publication Number | Publication Date |
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| CN104018433A CN104018433A (en) | 2014-09-03 |
| CN104018433B true CN104018433B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410219783.2A Active CN104018433B (en) | 2014-05-23 | 2014-05-23 | A kind of bridge External prestressed cable wire turns to boots-outer tube steering gear |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107841951B (en) * | 2017-09-28 | 2023-08-01 | 苏交科集团股份有限公司 | Preloading device for controlling pier top concrete cracks of steel-concrete composite girder bridge and construction method |
| CN113027165A (en) * | 2021-03-30 | 2021-06-25 | 中国国家铁路集团有限公司 | Lightweight external prestress reinforcing system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000036222A1 (en) * | 1998-12-16 | 2000-06-22 | Bilfinger + Berger Bauaktiengesellschaft | External prestressing member |
| DE202005017463U1 (en) * | 2005-11-09 | 2007-03-15 | Dywidag-Systems International Gmbh | A method for protecting the tension cables of a pylon of a suspension bridge structure from corrosion at the crown points has the cables enclosed in a curved tube enclosed in an oval section support tube |
| CN200981977Y (en) * | 2006-12-01 | 2007-11-28 | 北京市市政工程设计研究总院 | Middle-span transfer connecting instrument |
| CN203007840U (en) * | 2012-12-25 | 2013-06-19 | 合肥斯派索材料科技有限公司 | Oblique cable steering gear for cable tower |
| CN103476993A (en) * | 2010-12-08 | 2013-12-25 | 索列丹斯-弗莱西奈公司 | Device for diverting a structural cable, such as a guy line, and construction comprising same |
| CN203890901U (en) * | 2014-05-23 | 2014-10-22 | 中交隧道工程局有限公司 | External prestressing steel cable steering shoe-outer casing steering gear for bridge |
-
2014
- 2014-05-23 CN CN201410219783.2A patent/CN104018433B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000036222A1 (en) * | 1998-12-16 | 2000-06-22 | Bilfinger + Berger Bauaktiengesellschaft | External prestressing member |
| DE202005017463U1 (en) * | 2005-11-09 | 2007-03-15 | Dywidag-Systems International Gmbh | A method for protecting the tension cables of a pylon of a suspension bridge structure from corrosion at the crown points has the cables enclosed in a curved tube enclosed in an oval section support tube |
| CN200981977Y (en) * | 2006-12-01 | 2007-11-28 | 北京市市政工程设计研究总院 | Middle-span transfer connecting instrument |
| CN103476993A (en) * | 2010-12-08 | 2013-12-25 | 索列丹斯-弗莱西奈公司 | Device for diverting a structural cable, such as a guy line, and construction comprising same |
| CN203007840U (en) * | 2012-12-25 | 2013-06-19 | 合肥斯派索材料科技有限公司 | Oblique cable steering gear for cable tower |
| CN203890901U (en) * | 2014-05-23 | 2014-10-22 | 中交隧道工程局有限公司 | External prestressing steel cable steering shoe-outer casing steering gear for bridge |
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Inventor after: Cui Shouyuan Inventor after: Sun Jianping Inventor after: Jin Zhuang Inventor after: Qiu Yinghe Inventor before: Sun Jianping Inventor before: Jin Zhuang Inventor before: Qiu Yinghe Inventor before: Cui Shouyuan |
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