CN212432397U - Steel structure bridge steel arch rib vertical cable stress adjustment testing device - Google Patents
Steel structure bridge steel arch rib vertical cable stress adjustment testing device Download PDFInfo
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- CN212432397U CN212432397U CN202020849904.2U CN202020849904U CN212432397U CN 212432397 U CN212432397 U CN 212432397U CN 202020849904 U CN202020849904 U CN 202020849904U CN 212432397 U CN212432397 U CN 212432397U
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Abstract
The utility model provides a steel arch rib vertical cable stress adjustment testing device of a steel structure bridge, which comprises an upper stretcher beam, a lower stretcher beam and a plurality of power units, wherein the power units are all arranged between the upper stretcher beam and the lower stretcher beam; the power unit comprises an oil jack and a tensioning screw rod, the oil jack is fixed on the upper stretcher beam, one end of the tensioning screw rod is fixedly connected with the lower stretcher beam, and the other end of the tensioning screw rod penetrates through the upper stretcher beam and then is fixedly connected with a piston of the oil jack; the testing device is also provided with an electric acceleration sensor, a cable force instrument and a computer, wherein the electric acceleration sensor is arranged on an adjusting nut of the cable. A steel construction bridge steel arch rib perpendicular cable stress adjustment testing arrangement, utilize oil jack to provide power for the cable atress is even, rethread electric acceleration sensor tests cable stress, effectively guarantees cable adjustment precision.
Description
Technical Field
The utility model belongs to the technical field of steel construction bridge steel arch cable stretch-draw, especially, relate to a steel construction bridge steel arch rib perpendicular cable stress adjustment testing arrangement.
Background
With the continuous development of bridge technology and the continuous improvement of aesthetic requirements of people on bridges, bridge guy cable structures are rapidly developed. The bridge prestressed stay cable is used as a structural member for bearing pulling force efficiently, and constant load and live load of a bridge girder and a bridge deck system are transmitted to a bridge tower or a steel arch rib. Traditional cable-stayed bridges and suspension bridges are mostly supported by bridge tower structures and the like. In recent years, the processing and manufacturing technology of steel structure bridges is rapidly developed, steel arch rib bridges are widely applied due to the characteristics of low cost, quick construction, attractive appearance and the like, and the steel arch rib bridges have specific advantages in the field of medium and small span bridges, particularly urban landscape bridges. The fork lug type inhaul cable is definite in stress, and is simple and convenient to install, maintain and replace, and the traditional nut type anchoring inhaul cable is replaced. Therefore, the installation and tensioning difficulty and the later-stage operation and maintenance cost can be better reduced, and the service life of the inhaul cable is prolonged.
The cable force test adjustment is very important in the construction process of concrete bridges or steel structure arch bridges and in the regular inspection and maintenance, and has a great significance. The size of the cable force directly influences the stress and linear deformation state of the bridge after the bridge is formed, so the control of the cable force is a key link in the bridge construction in the construction stage. The guy cable has different forms, different adjusting and testing methods, different tools and different equipment, and is particularly applied to the adjusting equipment of the vertical guy cable of the steel arch rib, which needs to be further improved and updated, so that the research on the adjusting and testing device of the vertical guy cable of the steel arch bridge is very necessary.
Disclosure of Invention
In view of this, the utility model aims at providing a steel construction bridge steel arch rib perpendicular cable stress adjustment testing arrangement to can be light-duty convenient, quick adjustment test steel arch cable stress and line type change.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a stress adjustment testing device for a steel arch rib vertical stay cable of a steel structure bridge comprises an upper stretcher beam, a lower stretcher beam and a plurality of power units, wherein the upper stretcher beam is positioned above the lower stretcher beam;
the testing device is characterized in that the power unit comprises an oil jack and a tensioning screw rod, the oil jack is fixed on an upper stretcher beam, one end of the tensioning screw rod is fixedly connected with a lower stretcher beam, the other end of the tensioning screw rod penetrates through the upper stretcher beam and then is fixedly connected with a piston of the oil jack, the testing device is further provided with a hydraulic station, and the oil jack is connected with the hydraulic station through a pipeline;
the testing device is further provided with an electric acceleration sensor, a cable force instrument and a computer, wherein the electric acceleration sensor is installed on an adjusting nut of the cable, and the cable force instrument is connected with the electric acceleration sensor and the computer through lines respectively.
Furthermore, the upper stretcher beam comprises two clamping plates and a plurality of first connecting bolts, the clamping plates are fixedly connected through the first connecting bolts, arc-shaped clamping grooves are formed in the clamping plates, and the lower stretcher beam and the upper stretcher beam are identical in structure.
Furthermore, the power unit is also provided with 2 jack fixing frames, the tops of the jack fixing frames are respectively clamped on two sides of the oil jack, and the bottom ends of the jack fixing frames are fixedly connected with the upper stretcher beam.
Furthermore, the jack fixing frame is of a U-shaped structure.
Furthermore, a plurality of fixing long holes matched with the jack fixing frame are formed in the clamping plates.
Furthermore, a plurality of bolt grooves matched with the tensioning screws are formed in the clamping plates.
Furthermore, one side of the clamping plate is provided with a plurality of bolt through holes matched with the first connecting bolts.
Compared with the prior art, a steel structure bridge steel arch rib perpendicular cable stress adjustment testing arrangement have following advantage:
(1) a steel structure bridge steel arch rib perpendicular cable stress adjustment testing arrangement, utilize oil jack to provide power, and oil jack is following the circumferencial direction evenly distributed of cable for the cable atress is even, rethread electric acceleration sensor tests cable stress, effectively guarantees cable adjustment precision, reaches the effect of comparison ideal better.
(2) A steel structure bridge steel arch rib perpendicular cable stress adjustment testing arrangement, utilize the jack mount to consolidate the jack, guarantee that the power that the jack provided is more stable, the skew can not appear, and the jack mount can be applicable to not unidimensional jack, application scope is wider.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a testing apparatus according to an embodiment of the present invention;
fig. 2 is a side view of a testing device according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an upper stretcher beam according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a splint according to an embodiment of the present invention.
Description of reference numerals:
1. an upper stretcher beam; 11. a splint; 111. a card slot; 112. fixing the long hole; 113. a bolt slot; 114. a bolt through hole; 12. a first connecting bolt; 2. a lower stretcher beam; 3. a power unit; 31. an oil jack; 32. Stretching the screw; 33. a jack fixing frame; 4. a hydraulic station; 5. an electrical acceleration sensor; 6. a cable; 61. an upper hanging head; 62. steel strand wires; 63. an anchor head; 64. adjusting the nut; 65. adjusting a rod; 66. An adjustment sleeve; 67. and (5) lowering the hanging head.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, a steel arch rib vertical cable stress adjustment testing device for a steel structure bridge comprises an upper load beam 1, a lower load beam 2 and a plurality of power units 3, wherein the upper load beam 1 is positioned above the lower load beam 2, the power units 3 are all arranged between the upper load beam 1 and the lower load beam 2, the power units 3 are respectively arranged at the outer sides of cables 6, and the power units 3 are uniformly distributed along the circumferential direction of the cables 6; utilize oil jack 31 to provide power, and oil jack 31 is along cable 6's circumferencial direction evenly distributed for 6 atresss of cable are even, and 6 stresses of rethread electric acceleration sensor 5 test cable effectively guarantee 6 adjustment accuracy of cable, reach more ideal effect better.
The power unit 3 comprises an oil jack 31 and a tension screw 32, the oil jack 31 is fixed on the upper load beam 1, one end of the tension screw 32 is fixedly connected with the lower load beam 2, the other end of the tension screw 32 penetrates through the upper load beam 1 and then is fixedly connected with a piston of the oil jack 31, the testing device is also provided with a hydraulic station 4, and the oil jack 31 is connected with the hydraulic station 4 through a pipeline;
the testing device is also provided with an electric acceleration sensor 5, a cable force instrument and a computer, wherein the electric acceleration sensor 5 is arranged on an adjusting nut 64 of the cable 6, and the cable force instrument is respectively connected with the electric acceleration sensor 5 and the computer through circuits. The computer can be a common computer in the prior art, and is not described in detail herein.
In some embodiments, the electric acceleration sensor 5 employs, but is not limited to, a piezoelectric acceleration sensor 5 of the INV982X universal type.
In some embodiments, the cable force instrument employs, but is not limited to, an INV3018CT harvester. The program applied by the connection of the acquisition instrument and the computer is also the prior art, and is not described again.
The upper stretcher beam 1 comprises two clamping plates 11 and a plurality of first connecting bolts 12, the clamping plates 11 are fixedly connected through the first connecting bolts 12, arc-shaped clamping grooves 111 are formed in the clamping plates 11, and the lower stretcher beam 2 is identical to the upper stretcher beam 1 in structure.
The power unit 3 is further provided with 2 jack fixing frames 33, the tops of the jack fixing frames 33 are clamped on two sides of the oil jack 31 respectively, and the bottom ends of the jack fixing frames 33 are fixedly connected with the upper stretcher beam 1. Utilize jack mount 33 to consolidate the jack, guarantee that the power that the jack provided is more stable, the skew can not appear, and jack mount 33 can be applicable to not unidimensional jack, and application scope is wider.
The jack fixing frame 33 is a U-shaped structure.
The clamping plates 11 are all provided with a plurality of fixing long holes 112 matched with the jack fixing frames 33. The fixing screw of the jack fixing bracket 33 can slide in the fixing long hole 112 to move the position to fit the hydraulic jacks 31 of different sizes.
In some embodiments, the jack fixing frame 33 includes a cross beam and 2 fixing screws, the cross beam is clamped on the top edge of the oil jack 31, the fixing screws are respectively fixed at two ends of the cross beam, the upper support beam 1 is provided with a plurality of fixing holes matched with the fixing screws, and the bottom ends of the fixing screws are fixed by nuts after passing through the fixing long holes 112.
The clamping plates 11 are all provided with a plurality of bolt grooves 113 matched with the tensioning screws 32. The bolt slots 113 of the two clamping plates 11 form circular bolt holes, and the tensioning screws 32 are arranged in the bolt holes in a penetrating mode.
One side of the clamping plate 11 is provided with a plurality of bolt through holes 114 which are matched with the first connecting bolts 12.
In some embodiments, the lower stretcher beam 2 is installed first, the clamping grooves 111 of the two clamping plates 11 form a circular through hole, so that the tensioning screw 32 can be tightly installed below the adjusting sleeve 66 of the inhaul cable 6, and the two clamping plates 11 are screwed and fixed by 2 first connecting bolts 12 and nuts to form the lower stretcher beam 2; the upper spreader 1 is mounted above the adjusting nut 64 of the stay 6 in the same manner. Then installing a tensioning screw 32, respectively penetrating the upper stretcher beam 1 and the lower stretcher beam 2 from top to bottom, then placing an oil jack 31 on the upper part of the upper stretcher beam 1, penetrating the tensioning screw 32, and finally fastening the upper part and the lower part by high-strength nuts.
Installing an oil pipe: 2 oil pump connectors on each oil jack 31 are respectively connected with an oil inlet pipe and an oil return pipe, the other end of each oil pipe is connected with a hydraulic station 4, and an oil pressure gauge is connected with the hydraulic station 4.
The moving moment is used for moving the adjusting rod 65 of the inhaul cable 6 when the inhaul cable 6 is adjusted; the electric acceleration sensor 5 is tightly attached to the adjusting nut 64 of the inhaul cable 6 by means of manual work when the stress of the inhaul cable 6 is tested, and then data are transmitted to the cable force instrument and then transmitted to the computer through the cable force instrument. The steel tape is used for measuring the distance between the upper and lower stretcher beams and observing the deformation of the steel arch line.
Before testing, all heaped loads and irrelevant personnel and equipment on the bridge deck are cleared in advance, the accuracy of tensioning the structure cable force is guaranteed, and the influence on the judgment of the structure safety caused by the interference of the irrelevant factors on the test result is avoided.
When the hydraulic pressure measuring device is used specifically, the distance between the upper hanging head and the lower hanging head and the distance between the upper stretcher beam and the lower stretcher beam are measured manually and accurately by using the steel tape, then the hydraulic station 4 is started, the piston of the hydraulic jack 31 extends out for tensioning by starting the hydraulic station 4, the numerical value of the hydraulic gauge is observed to calculate the cable force, and then the cable 6 is fastened to adjust the rod 65 so as to achieve the purpose of fastening.
The oil pump slowly pressurizes, the adjusting rod 65 on the zipper is adjusted at the same time, when the oil pressure gauge on the hydraulic station 4 is watched, the pulling torque is used for moving the pulling rope 6 to adjust the rod 65, the adjusting rod 65 slowly rotates in the adjusting sleeve, screwing in or screwing out is carried out according to the set rope force (the pulling rope force is released by screwing out the adjusting rod 65 under individual conditions for balancing the stress of each pulling rope 6), the set rope force value is reached, and the adjustment of one zipper is finished by pressure relief of the hydraulic station 4.
The auxiliary personnel closely attach the electric acceleration sensor 5 to the adjusting nut 64 of the inhaul cable 6 (the electric acceleration sensor 5 can be adsorbed on the adjusting nut 64 of the inhaul cable 6 by using a magnet), test the stress of the inhaul cable 6, the cable dynamometer displays a cable force value to be compared with a converted value of an oil pressure meter, the steel tape is used for measuring the distance between an upper stretcher beam and a lower stretcher beam, and the deformation and the stress of the inhaul cable 6 are corrected.
And all the inhaul cables are subjected to through test according to a symmetrical principle, and one round of cable force adjustment test is completed.
The general engineering cable force needs to be adjusted and tested for three times, and if necessary, the tensioning adjustment of the inhaul cables is carried out by adopting a small-step multi-wheel method, namely the cable force of each inhaul cable does not need to be tensioned in place once, the inhaul cables are tensioned in a grading mode according to the cable force and the mutual interference condition and gradually approach the target cable force, although the tensioning frequency is increased, the adjustment precision of the inhaul cables can be effectively guaranteed, and the ideal effect is better achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a perpendicular cable stress adjustment testing arrangement of steel structure bridge steel arch rib which characterized in that: the upper stretcher beam is positioned above the lower stretcher beam, the power units are all arranged between the upper stretcher beam and the lower stretcher beam, the power units are respectively arranged at the outer sides of the inhaul cables, and the power units are uniformly distributed along the circumferential direction of the inhaul cables;
the testing device is characterized in that the power unit comprises an oil jack and a tensioning screw rod, the oil jack is fixed on an upper stretcher beam, one end of the tensioning screw rod is fixedly connected with a lower stretcher beam, the other end of the tensioning screw rod penetrates through the upper stretcher beam and then is fixedly connected with a piston of the oil jack, the testing device is further provided with a hydraulic station, and the oil jack is connected with the hydraulic station through a pipeline;
the testing device is further provided with an electric acceleration sensor, a cable force instrument and a computer, wherein the electric acceleration sensor is installed on an adjusting nut of the cable, and the cable force instrument is connected with the electric acceleration sensor and the computer through lines respectively.
2. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 1, wherein: the upper stretcher beam comprises two clamping plates and a plurality of first connecting bolts, the clamping plates are fixedly connected through the first connecting bolts, arc-shaped clamping grooves are formed in the clamping plates, and the lower stretcher beam and the upper stretcher beam are identical in structure.
3. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 2, wherein: the power unit is also provided with 2 jack fixing frames, the tops of the jack fixing frames are clamped on two sides of the oil jack respectively, and the bottom ends of the jack fixing frames are fixedly connected with the upper stretcher beam.
4. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 3, wherein: the jack fixing frame is of a U-shaped structure.
5. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 4, wherein: and the clamping plates are provided with a plurality of fixing long holes matched with the jack fixing frame.
6. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 2, wherein: and the clamping plates are provided with a plurality of bolt grooves matched with the tensioning screws.
7. The steel structure bridge steel arch rib vertical cable stress adjustment testing device of claim 2, wherein: and a plurality of bolt through holes matched with the first connecting bolts are formed in one side of the clamping plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020849904.2U CN212432397U (en) | 2020-05-20 | 2020-05-20 | Steel structure bridge steel arch rib vertical cable stress adjustment testing device |
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| CN202020849904.2U CN212432397U (en) | 2020-05-20 | 2020-05-20 | Steel structure bridge steel arch rib vertical cable stress adjustment testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174858A (en) * | 2021-04-25 | 2021-07-27 | 中国电建市政建设集团有限公司 | Stress-free installation and adjustment construction method for vertical stay cable of fork-lug type anchorage device |
| CN116886018A (en) * | 2023-07-13 | 2023-10-13 | 石家庄铁道大学 | Automatic adjusting device for wind-proof cable-suction force |
| CN117368094A (en) * | 2023-12-07 | 2024-01-09 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Device and method for detecting anti-slip performance of cross cable buckle with space reticular structure |
-
2020
- 2020-05-20 CN CN202020849904.2U patent/CN212432397U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174858A (en) * | 2021-04-25 | 2021-07-27 | 中国电建市政建设集团有限公司 | Stress-free installation and adjustment construction method for vertical stay cable of fork-lug type anchorage device |
| CN116886018A (en) * | 2023-07-13 | 2023-10-13 | 石家庄铁道大学 | Automatic adjusting device for wind-proof cable-suction force |
| CN117368094A (en) * | 2023-12-07 | 2024-01-09 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Device and method for detecting anti-slip performance of cross cable buckle with space reticular structure |
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