CN214703084U - Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device - Google Patents
Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device Download PDFInfo
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- CN214703084U CN214703084U CN202120914457.9U CN202120914457U CN214703084U CN 214703084 U CN214703084 U CN 214703084U CN 202120914457 U CN202120914457 U CN 202120914457U CN 214703084 U CN214703084 U CN 214703084U
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Abstract
The utility model discloses a cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device, which comprises an anchoring mechanism, a steel box-beam section, a pressure sensor, a jack and an anchoring device; the steel box girder section and the anchoring device are fixedly arranged; the anchoring mechanism is fixedly connected in the steel box girder section and is provided with two anchor backing plates which can fix two stay cables simultaneously; the pressure sensor and the jack are mutually overlapped, the anchoring device is provided with a positioning plate for fixing the jack, and the anchoring mechanism is provided with a second base plate for fixing the pressure sensor. The utility model discloses need not be with the help of the counter-force wall, each part all adopts the steel construction, and it is fast to build the mould, and is not high to the requirement in experimental place, also not high to the requirement of test equipment, can all go on indoor, outdoor, so experimental convenient high-efficient.
Description
Technical Field
The utility model relates to a bridge construction equipment technical field, concretely relates to cable-stay bridge cable-girder anchoring structure reduced scale test model loading device.
Background
In the research work of the cable-beam anchoring structure, the requirements of a test field, test equipment, operability, cost and the like are comprehensively considered, and the cable-beam anchoring structure scale test becomes a mainstream trend. And a set of model test loading system is needed for the scale test research of the cable-beam anchoring structure. The cable beam anchoring structure is mainly divided into four types in engineering: anchor box, ear plate, anchor tube, and anchor plate. At present, the anchoring structure of the domestic anchor box type cable beam mainly adopts a single-cable steel anchor box, namely, only one guide cable pipe of one steel anchor box is anchored by one guide cable pipe through one anchor backing plate. To this kind of traditional single cable steel anchor case cable beam anchoring structure, its model test then has two kinds of modes: firstly, taking a partial structure at a cable beam anchoring area as a test piece, erecting a model test piece according to the original cable direction, welding the lower end of the model test piece on a base, and directly applying thrust along the original cable direction of the cable beam anchoring structure by using a hydraulic jack to simulate the cable-stayed cable force, such as a cable beam anchoring model test of a Shanghai Yangtze river bridge; secondly, the beam body of the cable beam anchoring area is simplified into an I-shaped beam or a box beam, a vertical upright post is welded at the beam end, an inclined support is arranged at the beam end to serve as a reaction frame, a reaction wall is matched, and a simulation cable is tensioned by a jack to realize loading, such as a cable beam anchoring area test of a long bridge of Sutong Yangtze river. Both modes realize the simulation of single cable through the jack.
For a double-stay-cable steel anchor box, namely one steel anchor box is provided with two stay cable pipes which are used for anchoring two stay cables through two anchor backing plates, the cable force efficiency is greatly improved by the type, and the structure is suitable for large-width and large-span highway-railway same-layer cable-stayed bridges, such as Yibin Yangtze river bridges for highway and railway. If the traditional jack is continuously adopted to simulate the stayed cable force to realize loading, the jack of the first method directly acts between the loading base and the jack distribution beam, the thrust of the jack is transmitted to the anchor box by the jack distribution beam, and the cable force in a large range needs a plurality of jacks to simultaneously act on the jack distribution beam, so that the condition of uneven distribution of the loading force can occur; the second method focuses on the simulation of stay cable line shape, and under the direct tension of a jack, the inclined support reaction frame and the model test piece are easy to twist. Therefore, the difference between the simulated cable force and the real bridge cable force is large in the traditional loading mode, and the modeling is long in time consumption and high in cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a cable-stay bridge cable beam anchor structure scale test model loading device, the model test research that is applicable to two cable steel anchor casees appears when can avoiding traditional jack simulation tension such as loading force simulation not arriving, the process of the test easily appears the not high problem of test result accuracy that multiple external factors such as careless mistakes of taking an emergency of careless, has the advantage of short consuming time, the low test cost of modeling simultaneously.
For solving the technical problem, the utility model discloses the technical scheme who adopts does:
a cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device comprises an anchoring mechanism, a steel box-beam section, a pressure sensor, a jack and an anchoring device; the steel box girder section and the anchoring device are fixedly arranged; the anchoring mechanism is fixedly connected in the steel box girder section and is provided with two anchor backing plates which can fix two stay cables simultaneously; the pressure sensor and the jack are mutually overlapped, the anchoring device is provided with a positioning plate for fixing the jack, and the anchoring mechanism is provided with a second base plate for fixing the pressure sensor.
As a further technical scheme of the above scheme, the end part of the anchoring device, which is close to the steel box girder section, is connected with a third base plate, and the positioning plate is arranged between the third base plate and the jack.
As a further technical scheme of the above scheme, the positioning plate includes two clamping portions, one of the clamping portions is fixedly connected with the third cushion plate, the other clamping portion is detachably connected with the clamping portion, and the two clamping portions are jointly used for fixing the jack.
As a further technical solution of the above scheme, the end of the anchoring mechanism close to the anchoring device is connected with a first backing plate, and the second backing plate is arranged between the first backing plate and the pressure sensor.
As a further technical scheme of above-mentioned scheme, be equipped with spacing bulge on the first backing plate, correspond this spacing bulge on the second backing plate and be equipped with spacing block portion.
As a further technical scheme of the scheme, the bottom of the steel box girder section is fixed to the ground through an earth anchor bolt.
As a further technical solution of the above, the bottom of the anchoring device is fixed to the ground by an earth anchor bolt.
As a further technical solution of the above solution, the anchoring device includes a base plate, a fixing plate and a connecting plate; the base plate is horizontally arranged and is fixed to the ground through an earth anchor bolt; a plurality of fixed plates are fixedly connected to the base plate, and a plurality of connecting plates are fixedly connected between adjacent fixed plates.
As a further technical scheme of the scheme, the anchoring mechanism, the steel box girder section and the anchoring device are all steel structures.
Compared with the prior art, the utility model, following advantage and beneficial effect have: the utility model discloses need not be with the help of the counter-force wall, each part all adopts the steel construction, and it is fast to build the mould, and is not high to the requirement in experimental place, also not high to the requirement of test equipment, can all go on indoor, outdoor, so experimental convenient high-efficient. The cable beam anchoring area in the actual engineering is under the combined action of different stay cables, the deformation in the horizontal section is uniform, the force of the stay cable is simulated by pushing the stay cable by a jack, and the actual condition can be well simulated by uniform stress. The designed loading anchoring base has reasonable angle and the same direction with the stay cable force, and each force transmission component of the whole system can not fall off or deviate in the loading process, so that the stay cable force simulated by the jack can be directly transmitted to the anchoring base plate of the anchoring mechanism.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic diagram of the middle steel box girder section of the utility model.
Fig. 3 is a schematic structural diagram of the middle anchoring mechanism of the present invention.
The explanation of each reference number in the figure is: the device comprises an anchoring mechanism 1, a steel box girder section 2, a bottom plate 21, a web plate 22, a top plate 23, a pressure sensor 3, a jack 4, an anchoring device 5, an earth anchor bolt 6, a first base plate 701, a second base plate 702, a third base plate 703, a positioning plate 8 and an anchor base plate 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so as to further understand the concept, the technical problems to be solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions of the present invention.
It should be understood that the description of these embodiments is illustrative and not restrictive in any way, and that the embodiments described are only some but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of preferred embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-3, the cable-stayed bridge cable beam anchoring structure reduced scale test model loading device of the utility model comprises an anchoring mechanism 1, a steel box girder section 2, a pressure sensor 3, a jack 4 and an anchoring device 5.
The anchoring mechanism 1 and the web plate 22 of the steel box girder section 2 are welded together to form a reduced scale test model of the cable beam anchoring girder section. The bottom plate 21 of the steel box girder section 2 is fixed to a test site by an earth anchor bolt 6. The top of the anchoring mechanism 1 is provided with two anchor backing plates 9 which can fix two stay cables simultaneously.
The anchoring device 5 comprises a base plate, a fixing plate and a connecting plate. The bed plate is horizontally arranged, and is provided with a through hole for the ground anchor bolt 6 to pass through and be fixed with a test site. The welding has the vertical fixed plate that just sets up side by side of polylith on the bed plate, welds the rigidity of a plurality of connecting plates in order to strengthen whole anchor 5 between the adjacent fixed plate. And one side of the fixed plate, which is close to the anchoring mechanism 1, is welded with a supporting plate which is obliquely arranged.
The pressure sensor 3 and the jack 4 are arranged between the anchor backing plate 9 and the supporting plate. Specifically, the present embodiment has the pressure sensor 3 disposed on the side close to the anchoring mechanism 1, and the jack 4 disposed on the side close to the anchoring device 5. The surface of the supporting plate is welded with a third backing plate 703 to strengthen the supporting function of the jack 4. In order to ensure the positioning accuracy of the jack 4, a positioning plate 8 is arranged between the fixed end of the jack 4 and the third base plate 703, the positioning plate 8 comprises two clamping parts, one of the clamping parts is welded on the third base plate 703, and the other clamping part is detachably connected with the clamping part, preferably in bolted connection or clamped connection. In manufacturing the positioning plate 8, the center of the jack 4 to be mounted is determined on the third base plate 703, then the bottom surface size shape (generally circular shape) of the periphery of the jack 4 is drawn around the center, and then the two clamping portions are symmetrically arranged about the center. The inside of two clamping parts has the clamp groove that is used for the stiff end of centre gripping jack 4, and the stiff end of jack 4 can be convenient for install after 8 centre grippings of locating plate, and can improve the installation accuracy.
The jack 4 adopts a Jett's KSL 50005 model, the loaded maximum tonnage is 500T, the outer diameter is 400mm, the body height is 419mm, (the model and the tonnage can be selected adaptively in actual loading), the radian of a clamping groove of the positioning plate 8 is mainly determined by the outer diameter of the jack 4, and the diameter of the clamping groove is consistent with the outer diameter of the jack 4.
The first backing plate 701 is welded to the anchor backing plate 9 of the anchoring mechanism 1 to reinforce the strength of the anchoring mechanism 1. For location pressure sensor 3, the joint has second backing plate 702 on first backing plate 701, and the four corners of first backing plate 701 has spacing bulge, it is equipped with spacing block portion to correspond this spacing bulge on the second backing plate 702. The second base plate 702 is used for connecting the pressure sensor 3, and the pressure sensor 3 is connected with the second base plate 702 and then clamped in the first base plate 701, so that the installation efficiency of the pressure sensor 3 can be improved, and the installation accuracy of the pressure sensor 3 can be ensured.
The inclined stay cable and the bridge floor actually form an included angle, and the included angle is expressed as an acute angle included angle alpha between the axial direction of the steel box girder section 2 (namely the direction of the top plate 23 of the steel box girder section 2) and the direction of the inclined stay cable of the anchoring mechanism 1 in an actually selected model. In order to ensure that the ejection direction of the jack 4 is perpendicular to the anchor backing plate 9 of the anchoring mechanism 1, the inclined angle β =90 ° - α between the support plate of the anchoring device 5 and the horizontal is acute.
The utility model discloses there is clear and definite direct atress mechanism, will be by the steel case roof beam section 2 and the scale test model that anchoring mechanism 1 welded and pass through the anchor bolt 6 anchor at experimental place, the loading contact surface (anchor backing plate 9) of cable-stayed bridge anchoring mechanism is perpendicular with jack 4's loading direction this moment. Since the entire scale test model is constrained, the load of the jack 4 acts directly on the anchoring mechanism 1. Vertical component force generated when the jack 4 is loaded is balanced through the anchoring device 5, and meanwhile the lower part of the reduced scale test model is prevented from being separated from the base plate; simultaneously, anchor 5 can also restrict the lateral displacement of scale test model, effectively transmits the loading counter-force to the experimental place through the bed plate. The whole anchoring device 5 enables the reduced scale test model to be in a self-balancing state under the pushing action of the jack 4.
Nonlinear finite element analysis is carried out on each part of components, contact modes and boundary conditions of the scale test model and the loading counter-force system, and comparison of theoretical analysis results and test actual measurement results shows that: the loading device is definite in stress, the reaction system is still in an elastic stress state under the working condition of 2.5 times of the designed maximum main cable force, the bearing capacity is sufficient, the rigidity meets the requirement, and the scale test model can be safely and effectively loaded.
In order to facilitate loading and ensure the reliability of test results, a steel box girder section 2 with an appropriate angle and containing an anchoring mechanism 1 is determined before a mould is built, and a loading contact area (two anchor backing plates 9) of the anchoring mechanism 1 is vertical to the loading direction of a jack 4 after the steel box girder section 2 is horizontally placed. In this example, an acute angle α =33.646 ° between the anchoring mechanism 1 and the axial direction of the steel box girder segment 2 along the direction of the stay cable is only required to be designed, and at this time, an acute angle β =90 ° - α =90 ° -33.646 ° =56.535 ° between the support plate of the anchoring device 5 and the horizontal direction is only required to be designed. The scale test model selects a cable beam anchoring section and a beam section in a cantilever state, the height of the bottom plate 21 of the steel box beam section 2 at the moment is determined by a design drawing, the length of the web plate 22 and the length of the top plate 23 of the steel box beam section 2 are adaptively set, and the size of the model of the steel box beam section 2 at the moment is a proper test size. And then welding the anchoring mechanism 1 and the steel box girder section 2 to form a reduced-scale test model. For stable loading, the built reduced scale test model is anchored with the test site through the ground anchor bolt 6, and the anchoring device 5 is also anchored with the test site through the ground anchor bolt 6. At the moment, the assembly of the scale test model and the anchoring device 5 is finished, then the loading operation can be carried out, and the stress condition is directly obtained by the pressure sensor 3.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be 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 in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a cable-stay bridge cable-girder anchoring structure scale test model loading device which characterized in that: the device comprises an anchoring mechanism (1), a steel box girder section (2), a pressure sensor (3), a jack (4) and an anchoring device (5); the steel box girder section (2) and the anchoring device (5) are both fixedly arranged; the anchoring mechanism (1) is fixedly connected in the steel box girder section (2), and the anchoring mechanism (1) is provided with two anchor backing plates (9) which can fix two stay cables simultaneously; the pressure sensor (3) and the jack (4) are mutually overlapped, a positioning plate (8) for fixing the jack (4) is arranged on the anchoring device (5), and a second base plate (702) for fixing the pressure sensor (3) is arranged on the anchoring mechanism (1).
2. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 1, characterized in that: the end part, close to the steel box girder section (2), of the anchoring device (5) is connected with a third base plate (703), and the positioning plate (8) is arranged between the third base plate (703) and the jack (4).
3. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 2, characterized in that: the positioning plate (8) comprises two clamping parts, one clamping part is fixedly connected with the third base plate (703), the other clamping part is detachably connected with the clamping part, and the two clamping parts are jointly used for fixing the jack (4).
4. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 1, characterized in that: the end part of the anchoring mechanism (1) close to the anchoring device (5) is connected with a first base plate (701), and the second base plate (702) is arranged between the first base plate (701) and the pressure sensor (3).
5. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 4, wherein: the first base plate (701) is provided with a limiting protruding part, and the second base plate (702) is provided with a limiting clamping part corresponding to the limiting protruding part.
6. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 1, characterized in that: the bottom of the steel box girder section (2) is fixed to the ground through an earth anchor bolt (6).
7. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 1, characterized in that: the bottom of the anchoring device (5) is fixed to the ground by an earth anchor bolt (6).
8. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 7, wherein: the anchoring device (5) comprises a base plate, a fixing plate and a connecting plate; the base plate is horizontally arranged and is fixed to the ground through an earth anchor bolt (6); a plurality of fixed plates are fixedly connected to the base plate, and a plurality of connecting plates are fixedly connected between adjacent fixed plates.
9. The cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device as claimed in claim 1, characterized in that: the anchoring mechanism (1), the steel box girder section (2) and the anchoring device (5) are all steel structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120914457.9U CN214703084U (en) | 2021-04-29 | 2021-04-29 | Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120914457.9U CN214703084U (en) | 2021-04-29 | 2021-04-29 | Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214703084U true CN214703084U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120914457.9U Expired - Fee Related CN214703084U (en) | 2021-04-29 | 2021-04-29 | Cable-stayed bridge cable-beam anchoring structure reduced scale test model loading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214703084U (en) |
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2021
- 2021-04-29 CN CN202120914457.9U patent/CN214703084U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |