CN104018433A - Bridge external prestress steel cable steering shoe-outer sleeve steering gear - Google Patents
Bridge external prestress steel cable steering shoe-outer sleeve steering gear Download PDFInfo
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- CN104018433A CN104018433A CN201410219783.2A CN201410219783A CN104018433A CN 104018433 A CN104018433 A CN 104018433A CN 201410219783 A CN201410219783 A CN 201410219783A CN 104018433 A CN104018433 A CN 104018433A
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- outer tube
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Abstract
The invention relates to a bridge external prestress steel cable steering shoe-outer sleeve steering gear. The steering gear supports a prestress steel cable to perform steering at the corner in the radial direction and comprises an outer sleeve, a steering shoe and steel cable limiting wings; the outer sleeve is connected with a bridge steering frame or embedded in a concrete partition wall; the steering shoe is provided with a supporting arc surface supporting the prestress steel cable to perform smooth steering in the radial direction and is fixed and arranged in the outer sleeve; the two ends of the outer sleeve are respectively provided with one steel cable limiting wing. Compared with a traditional external prestress steel cable steering gear, the steering gear has the advantages of being formed by machining and welding common steel boards and steel pipes, being simple in machining technology, and achieving quality control easiness. The steering shoe is light, single in installation process, easy and convenient to install and low in machining and installing cost.
Description
Technical field
The invention belongs to bridge engineering external prestressing constructing apparatus, relate in particular to a kind of bridge External prestressed cable wire and turn to the steering gear of boots-outer tube.
Background technology
External prestressing technology is widely applied in Bridge Reconstruction process, one of the most effective means have been become in bridge strengthening construction, determining and turning to the accurate of space angle of prestressed cable steering position is the effective necessary condition that ensures prestress application.Because prestressed cable stretching force is very large, if transfer designs improper, likely cause the situations such as distortion in prestress application process, destruction, angle variation, cause cable wire external jacket destroy, apply prestressing force deviation excessive, reduce the phenomenons such as application life.
Steering gear in the past adopts socket diverter structure mostly, by turning to steel pipe, pass through steel pipe and outer steel pipe forms.Turning to steel pipe---cable wire within it portion passes through, and by cable wire turn-around design, becomes smoother curve, by factory, is bent; 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 socket, intermediate gaps is inserted epoxy mortar and is become one, and forms so the outer straight steering tube of introversion.Steering tube arranged outside outer tube, outer tube and cable wire turn to shelf or Transducers Embedded in Concrete to turn in partition wall, steering tube outside, 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.Turn to steel pipe to bend difficulty large, accuracy is difficult to guarantee; Steering tube and pass through between pipe and pour into epoxy mortar, belong to noxious material, and because gap is 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 likely destroyed; Weight is large, and difficulty is installed, and particularly for work high above the ground, installs, and 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 the steering gear of boots-outer tube.Make external prestressing cable wire transfer be easy to processing and manufacturing and installation, effectively Control Engineering quality, reduces construction cost.
To achieve these goals, technical scheme of the present invention is: a kind of bridge External prestressed cable wire turns to the steering gear of boots-outer tube, at radial support prestressed cable, on the corner turn to, comprise and be connected with bridge bogie or be embedded in the outer tube in concrete partition; Described prestressed cable is through the endoporus of described outer tube, in the endoporus of outer tube, be provided with and turn to boots, the described boots that turn to are provided with the bearing surface that radial support prestressed cable turns in casing tube internal hole outside gently, 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; At the two ends of outer tube, be provided with cable wire position-limited wing.
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, described in, turn to boots to comprise base plate, main put more energy into floor and the side floor of putting more energy into; The lateral surface of described base plate is the described bearing surface turning to gently at radial support prestressed cable, is described supporting cambered surface in the stage casing of described bearing surface, at the two ends of supporting cambered surface, is respectively provided with one section of transition plane in smoothing junction; The position of whole bearing surface in described outer tube is no more than the center line of outer tube; At the medial surface of base plate, along the trend of the described cable wire of supporting, be provided with the described master floor of putting more energy into, at the medial surface of base plate, the both sides of the main floor of putting more energy into are provided with the described side floor of putting more energy into; Main put more energy into floor and side are put more energy into the end of floor along being fixedly connected with base plate, 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, for wirerope is turned to gently, the extended one section of transition plane in one end of described base plate supporting cambered surface is parallel transition face, and described parallel transition face is parallel with the center line of described outer tube; The extended one section of transition plane of the other end of base plate supporting cambered surface 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, firm in order to guarantee to turn to the installation of boots, 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, in put more energy into floor and side of described master, put more energy into and between floor, be provided with reinforcing rib.
Further, the described cable wire position-limited wing in the every one end of described outer tube comprises two blocks of wing plates, the upper end of described two blocks of wing plates with described in turn to the both sides of the supporting cambered surface of boots to be connected, 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 outside expansion that turns to boots.
Further, described in, turn to the length of boots bearing surface to be greater than the length of described outer tube.
The invention has the beneficial effects as follows: adopt and turn to boots-outer tube as steering gear, compare with external prestressing cable wire transfer in the past, adopt conventional steel plate, steel pipe processing, 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 be the B of Fig. 2 to view, be to turn to boots bearing surface view;
Fig. 4 is that this practicality newly 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.
The specific embodiment
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, applies prestressing force to beam body, adjust beam body pre-stressed state, reach the object that improves bridge functional performance.For prestressing force being passed to beam body, transmit the bogie of stress or turn to dividing plate external setting of beam body, simultaneously by changing cable wire direction, rationally realize newly-increased prestressing force in the reasonable distribution of beam body.
The transformation of cable wire direction, must guarantee its mild transition, when guaranteeing cable wire angle, can not when applying prestressing force, cause cable wire bending damage, prestressing force is rationally delivered on turning rack simultaneously, and cable wire steering gear is exactly the device of realizing this function.
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of bridge External prestressed cable wire turns to the steering gear of boots-outer tube, at radial support prestressed cable, on the corner turns to, and comprises and is connected with bridge bogie or is embedded in the outer tube 10 in concrete partition; Described prestressed cable is through the endoporus of described outer tube, in the endoporus of outer tube, be provided with and turn to boots 20, the described bearing surface that turns to boots to be provided with and to turn to gently in casing tube internal hole outside at radial support prestressed cable, described bearing surface comprises one section of supporting cambered surface, described supporting cambered surface is along the axial bending of outer tube, support the center line 21f of cambered surface perpendicular to the axis 11 of outer tube, the two ends of bearing surface are arranged on the two ends of outer tube; At the two ends of outer tube, be provided with cable wire position-limited wing 30.
Described outer tube is the seamless steel pipe that wall thickness is not less than 8mm.
The described boots that turn to comprise base plate 21, main put more energy into floor 22 and the side floor 23 of putting more energy into; The lateral surface of described base plate is the described bearing surface turning to gently at radial support prestressed cable, in the stage casing of described bearing surface, be described supporting cambered surface 21a, two ends in supporting cambered surface are respectively provided with one section of transition plane in smoothing junction, i.e. the transition plane of described smooth connection is the plane tangent with supporting cambered surface; In order to make to turn on the position that is positioned at cable wire corner that boots can be stable, the position of whole bearing surface in described outer tube is no more than the center line of outer tube; At the medial surface of base plate, along the trend of the described cable wire of supporting, be provided with the described master floor of putting more energy into, at the medial surface of base plate, the both sides of the main floor of putting more energy into are provided with the described side floor of putting more energy into; Main put more energy into floor and side are put more energy into the end of floor along being fixedly connected with base plate, and the upper of the main floor of putting more energy into is connected with the inwall of described outer tube along 23a along the upper of floor of putting more energy into of 22a and side.
A kind of design scheme that base plate can adopt is: the extended one section of transition plane in one end of described base plate supporting cambered surface is parallel transition face 21b, and described parallel transition face is parallel with the center line of described outer tube; It is corner transition face 21c that the other end of base plate supporting cambered surface extends one section transition plane, and the included angle A 1 between the center line of described corner transition face and described outer tube equals to support the included angle A 0 corresponding to 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.
In put more energy into floor and side of described master, put more energy into and between floor, be provided with reinforcing rib 24.
Described cable wire position-limited wing in the every one end of described outer tube comprises two blocks of wing plates, the upper end of described two blocks of wing plates with described in turn to the both sides of the supporting cambered surface of boots to be connected, 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 outside expansion that turns to boots.
The described length that turns to boots bearing surface is greater than the length of described outer tube.Conventionally adopt and turn to boots bearing surface length to be greater than outer tube length 20mm.
The angle corresponding to arc section of described supporting cambered surface be the corner that bridge External prestressed cable wire of the present invention turns to the steering gear of boots-outer tube can make prestressed cable produce.The angle corresponding to arc section of supporting cambered surface is for being not more than 40 °.
The base plate supporting arc radius of cambered surface is relevant with the diameter of prestressed cable, and root prestressed cable job specfication is determined.When prestressed cable corner strengthens, can strengthen outer tube internal diameter, reduce to turn to the length of boots base plate.Conventionally the length of outer tube is 500mm～800mm.
Embodiment mono-:
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of bridge External prestressed cable wire turns to the steering gear of boots-outer tube, at radial support prestressed cable, on the corner turns to, 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 L 1=800mm; Outer tube is connected with bridge bogie.
The described boots that turn to comprise base plate 21, main put more energy into floor 22 and the side floor 23 of putting more energy into.The lateral surface of described base plate is the described bearing surface turning to gently at radial support prestressed cable, in the stage casing of described bearing surface, be described supporting cambered surface 21a, the arc radius R=2250mm of supporting cambered surface, angle corresponding to supporting cambered surface is A0=15 °, the length L 2=820mm of base plate, the thickness of base plate is 18mm; Parallel transition face 21b is extended in one end of described base plate supporting cambered surface, and parallel transition face is parallel with the center line of described outer tube, 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 the center line of corner transition face and described outer tube equals to support the included angle A 0 corresponding to arc section of cambered surface, is the corner of prestressed cable; The termination of outer tube is stretched out in the termination of angle transition face.At the medial surface 21d of base plate, along the trend (as Fig. 2, line 21e) of supporting cable wire, be provided with the described master floor of putting more energy into, the thickness of the main floor of putting more energy into is 18mm; At the medial surface of base plate,, the both sides of the main floor of putting more energy into are provided with the described side floor of putting more energy into, the put more energy into thickness of floor of side is 18mm; The main floor of putting more energy into upper along 22a and side put more energy into floor upper along 23a by the Curve Design processing of outer sleeve inner wall, guarantee to contact with outer tube closely connected.Main put more energy into floor and side are put more energy into the end of floor along connecing with base plate.
In put more energy into floor and side of described master, put more energy into and between floor, be provided with many reinforcing ribs 24.In the present embodiment, described reinforcing rib is that diameter is the reinforcing bar of 20mm, and main put more energy into floor and two sides are put more energy into and individually between floor are provided with 4 reinforcing ribs, and the spacing between adjacent reinforcing 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, the upper of the main floor of putting more energy into contacts with the inwall of outer tube along 23a along the upper of floor of putting more energy into of 22a and side; Align with one end of outer tube in the one end (as Fig. 6,20a) that is provided with parallel transition face, the other end of outer tube is stretched out in the one end (as Fig. 6,20b) that is provided with corner transition face.
According to stress cable wire trend on the corner, will turn to boots accurately behind location, master floor and the side floor of putting more energy into of putting more energy into will be welded in contact site, two ends with outer sleeve inner wall, guarantee to turn to that boots are firmly fixed, outer tube becomes firmly integral body 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, in the process that turns to boots location, can avoid turning to the direction reverse of boots.
In the every one end of described outer tube, cable wire position-limited wing is installed; The cable wire position-limited wing of every end comprises two blocks of wing plates, the upper end of two blocks of wing plates with described in turn to the both sides welding of the supporting cambered surface of boots, weld with the inwall of outer tube the lower end of two blocks of wing plates; Two blocks of wing plates from turn to the junction of boots to the outside expansion that turns to boots.
Through outer tube, turn to the supporting cambered surface of boots to be pressed on cable wire cable wire 40, make cable wire produce the corner of 15 °.
Claims (9)
1. bridge External prestressed cable wire turns to the steering gear of boots-outer tube, at radial support prestressed cable, on the corner turns to, and comprises and is connected with bridge bogie or is embedded in the outer tube in concrete partition; It is characterized in that, described prestressed cable is through the endoporus of described outer tube, in the endoporus of outer tube, be provided with and turn to boots, the described boots that turn to are provided with the bearing surface that radial support prestressed cable turns in casing tube internal hole outside gently, 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; At the two ends of outer tube, be provided with cable wire position-limited wing.
2. a kind of bridge External prestressed cable wire according to claim 1 turns to the steering gear of boots-outer tube, 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 the steering gear of boots-outer tube, 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 the steering gear of boots-outer tube, it is characterized in that, described in turn to boots to comprise base plate, main put more energy into floor and the side floor of putting more energy into; The lateral surface of described base plate is the described bearing surface turning to gently at radial support prestressed cable, is described supporting cambered surface in the stage casing of described bearing surface, at the two ends of supporting cambered surface, is respectively provided with one section of transition plane in smoothing junction; The position of whole bearing surface in described outer tube is no more than the center line of outer tube; At the medial surface of base plate, along the trend of the described cable wire of supporting, be provided with the described master floor of putting more energy into, at the medial surface of base plate, the both sides of the main floor of putting more energy into are provided with the described side floor of putting more energy into; Main put more energy into floor and side are put more energy into the end of floor along being fixedly connected with base plate, 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.
5. a kind of bridge External prestressed cable wire according to claim 4 turns to the steering gear of boots-outer tube, it is characterized in that, the extended one section of transition plane in one end of described base plate supporting cambered surface is parallel transition face, and described parallel transition face is parallel with the center line of described outer tube; The extended one section of transition plane of the other end of base plate supporting cambered surface 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.
6. a kind of bridge External prestressed cable wire according to claim 4 turns to the steering gear of boots-outer tube, 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.
7. a kind of bridge External prestressed cable wire according to claim 4 turns to the steering gear of boots-outer tube, it is characterized in that, in put more energy into floor and side of described master, puts more energy into and between floor, is provided with reinforcing rib.
8. a kind of bridge External prestressed cable wire according to claim 1 turns to the steering gear of boots-outer tube, it is characterized in that, described cable wire position-limited wing in the every one end of described outer tube comprises two blocks of wing plates, the upper end of described two blocks of wing plates with described in turn to the both sides of the supporting cambered surface of boots to be connected, 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 outside expansion that turns to boots.
9. a kind of bridge External prestressed cable wire according to claim 1 turns to the steering gear of boots-outer tube, 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 true CN104018433A (en) | 2014-09-03 |
| CN104018433B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019062271A1 (en) * | 2017-09-28 | 2019-04-04 | 苏交科集团股份有限公司 | Pre-loading device and construction method for concrete crack control at pier top of steel-concrete composite bridge |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019062271A1 (en) * | 2017-09-28 | 2019-04-04 | 苏交科集团股份有限公司 | Pre-loading device and construction method for concrete crack control at pier top of steel-concrete composite bridge |
| 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 |
Also Published As
| Publication number | Publication date |
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| CN104018433B (en) | 2016-04-27 |
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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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