CN110725210A - Inhaul cable stepping tensioning construction method and tensioning equipment - Google Patents
Inhaul cable stepping tensioning construction method and tensioning equipment Download PDFInfo
- Publication number
- CN110725210A CN110725210A CN201911013514.XA CN201911013514A CN110725210A CN 110725210 A CN110725210 A CN 110725210A CN 201911013514 A CN201911013514 A CN 201911013514A CN 110725210 A CN110725210 A CN 110725210A
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- equipment
- tensioning
- corrugated pipe
- end cover
- nut
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- 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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a guy cable stepping tensioning construction method and tensioning equipment, wherein the tensioning equipment comprises one or at least two equipment main bodies which are sequentially arranged along the axial direction, the equipment main bodies are of hollow annular structures, each equipment main body comprises an inner corrugated pipe and an outer corrugated pipe which are arranged inside and outside, upper end covers of the annular structures are fixedly connected between the upper ends of the inner corrugated pipe and the outer corrugated pipe in a sealing manner, lower end covers of the annular structures are fixedly connected between the lower ends of the inner corrugated pipe and the outer corrugated pipe in a sealing manner, annular hydraulic cavities are defined by the inner corrugated pipe, the outer corrugated pipe, the upper end covers and the lower end covers, and oil ports communicated with the hydraulic cavities are arranged on the equipment main bodies. The invention provides a cable stepping tensioning construction method capable of reducing screwing resistance of a working nut in a cable tensioning process and tensioning equipment used in the cable stepping tensioning construction method.
Description
Technical Field
The invention relates to a guy cable stepping tensioning construction method and tensioning equipment in the field of guy cable installation of a guy cable bridge.
Background
A cable-stayed bridge is also called a diagonal tension bridge, is a bridge with a main beam directly pulled on a bridge tower by a plurality of guys, and is a structural system formed by combining a pressure-bearing tower, a pulled guy and a bending-bearing beam body. It can be regarded as a multi-span elastic support continuous beam with guy cables instead of buttresses. It can reduce the bending moment in the beam body, reduce the building height, lighten the structural weight and save materials. The cable-stayed bridge mainly comprises a cable tower, a main beam and a stay cable, wherein the stay cable is an important component of the cable-stayed bridge, the stay cable comprises a cable rope, the cable rope is generally made of steel stranded wires, and two ends of the cable rope are respectively connected with the tower and a bridge body through a cable anchoring structure. The existing stay cable anchoring structure comprises an anchor head fixedly connected to one end of a cable rope, external threads are arranged on the periphery of the anchor head, a working nut is connected to the external threads of the anchor head in a threaded mode, and one end of the working nut abuts against an anchor backing plate fixedly connected with a tower or a bridge body.
During the installation process of the inhaul cable, the working nut is screwed and is tensioned by driving the anchor head to move.
Disclosure of Invention
The invention aims to provide a cable stepping tensioning construction method which can reduce the screwing resistance of a working nut in the cable tensioning process; the invention also aims to provide tensioning equipment used in the stay cable stepping tensioning construction method.
In order to solve the technical problems, the technical scheme of the stay cable stepping tensioning construction method is as follows:
a stay cable stepping tensioning construction method is characterized in that when a stay cable is tensioned, tensioning equipment with a hollow annular structure is sleeved on a working nut, the tensioning equipment comprises one or at least two equipment main bodies which are sequentially arranged along the axial direction, each equipment main body comprises an inner corrugated pipe and an outer corrugated pipe which are arranged inside and outside, an upper end cover of the annular structure is fixedly connected between the upper ends of the inner corrugated pipe and the outer corrugated pipe in a sealing manner, a lower end cover of the annular structure is fixedly connected between the lower ends of the inner corrugated pipe and the outer corrugated pipe in a sealing manner, an annular hydraulic cavity is defined between the inner corrugated pipe, the outer corrugated pipe, the upper end cover and the lower end cover, an oil port communicated with the hydraulic cavity is arranged on the equipment main body, a tool nut used for abutting the tensioning equipment is screwed on an anchor head, one end of the tensioning equipment abuts against the tool nut, the other end of the tensioning equipment abuts against an anchor backing plate, the tensioning equipment drives the working nut to move towards the direction away from the anchor backing plate, the working nut is separated from the anchor backing plate, and the screwing working nut moves towards the direction of the anchor backing plate; and the tensioning equipment drives the working nut to move towards the direction far away from the anchor backing plate through the tool nut and the anchor head again, the screwing working nut moves towards the direction of the anchor backing plate, and the tensioning is completed after the circulation, and then the tool nut and the tensioning equipment are disassembled.
The technical scheme of the tensioning equipment comprises the following steps:
the utility model provides a stretch-draw equipment, includes one or at least two equipment principal that arrange in order along the axial, and the equipment principal is cavity loop configuration, and the equipment principal is including inside and outside interior ripple pipe and the outer ripple pipe of arranging, and the sealed upper end cover that links firmly loop configuration between the upper end of interior ripple pipe, outer ripple pipe, and the sealed lower extreme cover that links firmly loop configuration between the lower extreme of interior ripple pipe, outer ripple pipe, enclose into annular hydraulic pressure chamber between interior ripple pipe, outer ripple pipe, upper end cover and the lower extreme cover, be provided with in the equipment principal with the communicating hydraulic fluid port in hydraulic pressure chamber.
The equipment main body is also provided with a detection oil port, and the detection oil port is connected with a pressure sensor.
The equipment main part has at least two, and two adjacent equipment main parts's corresponding end cover is integrative to be set up.
The upper end cover and/or the lower end cover is/are rotatably provided with at least three friction wheels which are arranged at intervals along the circumferential direction and are used for being in contact fit with the working nut.
And the upper end cover and/or the lower end cover are/is provided with operation long holes which extend along the circumferential direction and are used for the corresponding torque input rods to penetrate through.
The invention has the beneficial effects that: when in use, the equipment main body with a hollow annular structure is sleeved on the periphery of the working nut, then the tool nut is screwed on the anchor head, the equipment main body is propped between the anchor backing plate and the tool nut by injecting oil into the hydraulic cavity, because the anchor backing plate is fixed on the tower or the bridge body, the anchor backing plate forms a counter-force bracket of the whole tensioning equipment, the inner corrugated pipe and the outer corrugated pipe extend, thereby leading the tool nut to drive the anchor head and further the working nut on the anchor head to move towards the direction far away from the anchor backing plate, leading the working nut to be separated from the anchor backing plate, leading the screwing working nut to move towards the anchor backing plate, in the process, the working nut is not contacted with the anchor backing plate, and large screwing resistance is not generated between the working nut and the anchor backing plate, so that time and labor are saved, after the working nut is screwed, and the tensioning equipment supports the tool nut again, so that the tensioning of the inhaul cable is finished step by step, and finally the tool nut and the tensioning equipment are removed.
Drawings
FIG. 1 is a diagram of the use of one embodiment of a tensioning device of the present invention;
FIG. 2 is a schematic view of the tensioning device of FIG. 1 after tensioning the tool nut;
FIG. 3 is a schematic view of the operative slot of FIG. 1 engaged with the working nut;
FIG. 4 is a schematic structural view of the apparatus body of FIG. 1;
FIG. 5 is a schematic view of the mating of the splines to the spline teeth of the present invention.
Detailed Description
The embodiment of the tensioning equipment in the invention is shown in figures 1-4: including two equipment principal 5 of arranging in order along the axial, equipment principal 5 is cavity loop configuration, equipment principal includes inside and outside interior bellows 6 and the outer bellows 8 of arranging, interior bellows 6, the sealed upper end cover 4 that links firmly loop configuration between the upper end of outer bellows 8, interior bellows 6, the sealed lower extreme cover 12 that links firmly loop configuration between the lower extreme of outer bellows 8, the upper end cover, the lower extreme cover coaxial line is arranged, interior bellows, outer bellows, enclose into annular hydraulic pressure chamber 7 between upper end cover and the lower extreme cover, be provided with on the lower extreme cover of equipment principal with the communicating hydraulic fluid port 20 in hydraulic pressure chamber. In the present invention, the adjacent end caps of the two apparatus main bodies, i.e., the lower end cap of the upper apparatus main body and the lower end cap of the lower apparatus main body are integrally disposed, and the integrally connected two end caps are referred to as a middle end cap 10. The middle end cover is also provided with detection ports 22 which are respectively communicated with the hydraulic cavities, and the detection ports are connected with pressure sensors 21. When the oil pump is filled with oil to the corresponding hydraulic cavity through the oil port 20, the inner corrugated pipe and the outer corrugated pipe are expanded to apply acting force to the outside, according to hooke's law, the elastic acting force of the inner corrugated pipe and the outer corrugated pipe to the lower end cover can be calculated according to the expansion lengths of the inner corrugated pipe and the outer corrugated pipe, and the hydraulic acting force applied to the lower end cover can be calculated according to the pressure value measured by the pressure sensor and the effective pressure receiving area of the lower end cover, so that the output force of the lower end cover can be accurately calculated, the influence of static friction force between a piston and a cylinder body in a hydraulic cylinder in the prior art is avoided, and the accurate output of force is realized. The inner corrugated pipe and the outer corrugated pipe in the embodiment are both metal corrugated pipes. The tensioning device of the bellows structure is lighter in weight and shorter in length than a hydraulic cylinder.
The middle end cover is rotatably assembled with four friction wheels 9 with four rotating axes arranged in parallel with the axes of the inner corrugated pipe and the outer corrugated pipe, the four friction wheels 9 are arranged at intervals along the circumferential direction of the middle end cover, the specific installation structure of the friction wheels is that the middle end cover is provided with friction wheel installation grooves with the number corresponding to the number of the friction wheels, each friction wheel installation groove is internally provided with a friction wheel axle 17, the friction wheels are fixed on the friction wheel axles, spline teeth 19 extending along the up-down direction are arranged on a motor shaft of a friction wheel driving motor (not shown in the figure) of the friction wheel driving motor driven by the friction wheel driving motor, the axle of the friction wheel is in transmission connection with the spline teeth 19 through a spline 18, the spline and the spline teeth are in guiding and moving fit in the up-down direction, the transmission of the friction wheel and the motor shaft is realized through the spline, so that the spline and the spline, the height of the friction wheel mounting groove is higher than that of the friction wheel, so that the friction wheel can have a certain axial movement amount relative to the middle end cover. The friction wheel is used for being in contact rolling fit with the working nut, and the friction wheel 9 is in contact with the working nut 11, so that the working nut can be driven to rotate through the friction wheel when the friction wheel rotates actively. The working nut 11 is provided with a plurality of rod insertion holes 2 which are arranged at intervals along the circumferential direction and used for inserting the corresponding torque input rods, the middle end cover is provided with an operation long hole 16 which is extended along the circumferential direction and used for allowing the corresponding torque input rods to pass through, and the operation long hole has axial span so that the working nut can be far away from the anchor backing plate and can be used for allowing the torque input rods to pass through after moving.
The use of the tensioning device is as follows: sleeving a tensioning device on a working nut 11 from one side of an anchor head 15 far away from an anchor backing plate 3, enabling a friction wheel to be in contact fit with the periphery of the working nut, then screwing a tool nut 14 onto the anchor head 15 from one side far away from the anchor backing plate, so that one end of the tensioning device abuts against the anchor backing plate 3, the other end of the tensioning device extends to abut against the tool nut 14 to apply force to the tool nut so as to tension a cable, the tool nut drives the anchor head 15 and the working nut 11 in threaded connection with the anchor head to move towards one side far away from the anchor backing plate as shown in figure 2, and then the working nut can be rotated in two ways, namely, the first way, the friction wheel rotates so as to drive the working nut to rotate; in the second type, a torque input rod is inserted into a rod jack of the working nut, and a worker pulls the torque input rod to drive the working nut to rotate. The working nut moves towards the anchor backing plate, then the tensioning equipment pushes the tool nut to move towards one side far away from the anchor backing plate again, and the tensioning of the inhaul cable is completed in a stepping mode. In other embodiments of the present invention, the end caps of two adjacent apparatus bodies may not be integrally disposed, for example, the lower end cap of the upper apparatus body directly abuts against the upper end cap of the lower apparatus body. Item 13 in the drawing shows an operating handle for turning the nut of the tool.
An embodiment of a cable stepping tensioning construction method is shown in fig. 1-5: when the stay cable is tensioned, tensioning equipment with a hollow annular structure is sleeved on the working nut, the tensioning equipment is the same as the tensioning equipment in the embodiments, a tool nut used for abutting the tensioning equipment is screwed on the anchor head, one end of the tensioning equipment abuts against the tool nut, the other end of the tensioning equipment abuts against the anchor backing plate, the tensioning equipment drives the working nut to move in the direction far away from the anchor backing plate through the tool nut and the anchor head, the working nut is separated from the anchor backing plate, and the screwing working nut moves in the direction of the anchor backing plate; and the tensioning equipment drives the working nut to move towards the direction far away from the anchor backing plate through the tool nut and the anchor head again, the screwing working nut moves towards the direction of the anchor backing plate, and the tensioning is completed after the circulation, and then the tool nut and the tensioning equipment are disassembled.
Claims (6)
1. A stay cable stepping tensioning construction method is characterized in that: when the guy cable is stretched, stretching equipment with a hollow annular structure is sleeved on the working nut, the stretching equipment comprises one or at least two equipment main bodies which are sequentially arranged along the axial direction, each equipment main body comprises an inner corrugated pipe and an outer corrugated pipe which are arranged inside and outside, the upper ends of the inner corrugated pipe and the outer corrugated pipe are fixedly connected with an upper end cover of the annular structure in a sealing way, the lower ends of the inner corrugated pipe and the outer corrugated pipe are fixedly connected with a lower end cover of the annular structure in a sealing way, an annular hydraulic cavity is defined by the inner corrugated pipe, the outer corrugated pipe, the upper end cover and the lower end cover, an oil port communicated with the hydraulic cavity is arranged on the equipment main body, a tool nut used for propping the stretching equipment is screwed on the anchor head, one end of the stretching equipment props against the tool nut, the other end of the stretching equipment props against the anchor backing plate, the stretching equipment drives the working nut to move towards the direction far away from the anchor backing plate through the tool nut and, screwing the working nut to move towards the direction of the anchor backing plate; and the tensioning equipment drives the working nut to move towards the direction far away from the anchor backing plate through the tool nut and the anchor head again, the screwing working nut moves towards the direction of the anchor backing plate, and the tensioning is completed after the circulation, and then the tool nut and the tensioning equipment are disassembled.
2. A tensioning device characterized by: including one or at least two equipment principal who arranges in order along the axial, the equipment principal is cavity loop configuration, and the equipment principal includes inside and outside interior bellows and the outer bellows of arranging, and the sealed upper end cover that links firmly loop configuration between the upper end of interior bellows, outer bellows, and the sealed lower extreme that links firmly loop configuration between the lower extreme of interior bellows, outer bellows, encloses into annular hydraulic pressure chamber between interior bellows, outer bellows, upper end cover and the lower extreme cover, be provided with in the equipment principal with the communicating hydraulic fluid port in hydraulic pressure chamber.
3. A tensioning device according to claim 2, characterized in that: the equipment main body is also provided with a detection oil port, and the detection oil port is connected with a pressure sensor.
4. A tensioning device according to claim 2, characterized in that: the equipment main part has at least two, and two adjacent equipment main parts's corresponding end cover is integrative to be set up.
5. A tensioning device according to claim 2, characterized in that: the upper end cover and/or the lower end cover is/are rotatably provided with at least three friction wheels which are arranged at intervals along the circumferential direction and are used for being in contact fit with the working nut.
6. A tensioning device according to claim 2, characterized in that: and the upper end cover and/or the lower end cover are/is provided with operation long holes which extend along the circumferential direction and are used for the corresponding torque input rods to penetrate through.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910365535 | 2019-05-01 | ||
| CN2019103655351 | 2019-05-01 |
Publications (2)
| Publication Number | Publication Date |
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| CN110725210A true CN110725210A (en) | 2020-01-24 |
| CN110725210B CN110725210B (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911013514.XA Active CN110725210B (en) | 2019-05-01 | 2019-10-23 | Inhaul cable stepping tensioning construction method and tensioning equipment |
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| CN (1) | CN110725210B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652965A (en) * | 2021-06-23 | 2021-11-16 | 中铁建工集团山东有限公司 | Stay cable space positioning tensioning construction system and tensioning construction method |
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| CN109668669A (en) * | 2019-01-12 | 2019-04-23 | 尚廷东 | A kind of pin-connected panel cable force measurement device for the measurement of rope rope tension |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113652965A (en) * | 2021-06-23 | 2021-11-16 | 中铁建工集团山东有限公司 | Stay cable space positioning tensioning construction system and tensioning construction method |
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| CN110725210B (en) | 2021-09-17 |
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Address after: 450000 No. 165 Nautical Middle Road, Erqi District, Zhengzhou City, Henan Province Applicant after: Henan Jiaoyuan Engineering Technology Group Co.,Ltd. Applicant after: Wang Lihong Address before: 450000 No. 165 Nautical Middle Road, Erqi District, Zhengzhou City, Henan Province Applicant before: HENAN JIAOYUAN ENGINEERING TECHNOLOGY Co.,Ltd. Applicant before: Wang Lihong |
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