CN210315223U - Suspension bridge cable crane prestressed anchor cable type anchorage structure - Google Patents
Suspension bridge cable crane prestressed anchor cable type anchorage structure Download PDFInfo
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- CN210315223U CN210315223U CN201920735475.3U CN201920735475U CN210315223U CN 210315223 U CN210315223 U CN 210315223U CN 201920735475 U CN201920735475 U CN 201920735475U CN 210315223 U CN210315223 U CN 210315223U
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Abstract
The utility model provides a suspension bridge cable crane prestressed anchor cable type anchorage structure, which comprises a concrete anchorage foundation and a plurality of beams of prestressed steel stranded wires, wherein the anchorage foundation is poured at the bottom of a mountain slope, and the outer wall of the anchorage foundation is transversely provided with two parallel anchorage beams; and the multiple prestressed steel strands are divided into an upper row and a lower row, each row corresponds to one anchoring beam, one end of each prestressed steel strand is anchored in the mountain, and the other end of each prestressed steel strand penetrates through the anchorage foundation and is anchored on the anchoring beam. The utility model discloses rely on the prestressing force steel strand wires of anchor in the massif to provide the counter-pulling force for the cable crane, not only solved because of the unable problem that adopts conventional anchorage of topography restriction, practiced thrift a large amount of concretes moreover, reduced the destruction to original looks.
Description
Technical Field
The utility model belongs to the technical field of suspension bridge construction, concretely relates to suspension bridge cable hangs prestressed anchorage cable formula anchorage structure.
Background
The cable crane anchorage structure of the suspension bridge usually adopts a gravity type ground anchor, a pile type ground anchor and a cavern anchor (a tunnel anchor). The gravity type ground anchor has the advantages of large earth volume needing to be excavated, great damage to the environment, long construction period and high construction cost; the pile type ground anchor needs to construct a pile foundation and has high requirements on geological conditions; the cavern anchor needs the two-bank terrain to have the conditions for excavating the cavern. The project constructed by the applicant is located in a canyon and a terrace landform area, the terrain fluctuation of the two shore areas is large, the project is limited by terrain and geological conditions, and the anchor structure can not be adopted, so that a novel, reliable and practical cable crane anchor structure needs to be designed according to the terrain.
Disclosure of Invention
The utility model aims at the above-mentioned problem that meets in the construction, provide one kind and be applicable to canyon landform, and safe and reliable, reasonable feasible suspension bridge anchorage structure to suspension bridge anchorage construction under the geological conditions of the same kind provides reference in the future.
The technical scheme of the utility model as follows:
the utility model provides a suspension bridge cable crane prestressed anchorage cable formula anchorage structure, suspension bridge is located between the canyon that mountain body formed, its characterized in that: the concrete anchor foundation is poured at the bottom of a slope body of a mountain body facing to a canyon, and two parallel anchor beams are transversely arranged on the outer wall of the anchor foundation; the multiple prestressed steel strands are divided into an upper row and a lower row which are equal in number, each row of prestressed steel strands corresponds to one anchoring beam, one end of each prestressed steel strand is anchored in a mountain, and the other end of each prestressed steel strand penetrates through the anchorage foundation and the anchoring beam and is anchored on the anchoring beam.
The utility model discloses rely on the prestressed anchorage cable of anchor in the massif to provide the counter-pulling force for the cable crane, not only effectively solved because of the difficult problem of the unable conventional anchorage of adoption of topography restriction, compare traditional anchorage construction moreover, practiced thrift a large amount of concretes, bearing capacity further improves, has reduced the destruction to original place physiognomy, has protected ecological environment.
Drawings
Fig. 1 is a side sectional view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a schematic plan view of the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, a suspension bridge cable crane prestressed anchor rope type anchorage structure is provided, the suspension bridge is located between canyons formed by mountains, the cable crane anchorage comprises a concrete anchorage foundation 1 and a plurality of prestressed steel strands 2, the anchorage foundation 1 is poured at the bottom of a slope body of the mountains 3 facing the canyons, and two parallel anchorage beams 4 are transversely arranged on the outer wall of the anchorage foundation 1; the multiple prestressed steel strands 2 are divided into an upper row and a lower row which are equal in number, each row of prestressed steel strands corresponds to one anchoring beam, one end of each prestressed steel strand 2 is anchored in the mountain 3, and the other end of each prestressed steel strand passes through the anchorage foundation 1 and the anchoring beam 4 and is anchored on the anchoring beam 4.
The anchoring beam 4 is a round steel pipe, one side of the anchoring beam 4 facing the anchoring foundation is corresponding to a box-shaped support 5 made of a steel plate welded to each pre-stressed steel strand, one side of the anchoring beam 4 facing away from the anchoring foundation is corresponding to each pre-stressed steel strand and is provided with a pre-stressed anchor 6, and each steel strand 2 penetrates through the support 5 and the anchoring beam 4 and then is anchored with the pre-stressed anchor 6.
The utility model discloses a prestressing force steel strand wires are as the anchor rope, and the anchor power of mainly relying on prestressing force steel strand wires in the mountain body provides the counter-force for the cable crane, and every prestressing force steel strand wires anchor is at least 20m in the length of mountain body internal part during concrete implementation.
The utility model discloses during concrete implementation, two rows of prestressing steel strand wires 2 pass anchorage basis 1's part and are parallel to each other, for guaranteeing prestressing steel strand wires's anchor power, go up the partial tilt up of prestressing steel strand wires anchor 2 in mountain body 3, lower partial downward sloping of prestressing steel strand wires 2 anchor in mountain body 3, every prestressing steel strand wires 2 anchor in the part in the mountain body and pass and be 5 contained angles between the anchorage basis part.
The utility model discloses a concrete construction method as follows:
1. and (3) adopting GPS lofting to release the designed position of the anchor foundation, manually cleaning the soil on the surface of the rock layer of the mountain by mechanical cooperation after the position is determined, adopting a total station to loft by a three-dimensional coordinate method, and marking the accurate position of the anchor hole of each prestressed steel strand in the mountain on the rock surface.
2. According to the designed anchoring depth of the prestressed steel strand, drilling an anchor hole on the rock surface of the mountain body by adopting a 150mm down-the-hole drill, wherein the vertical error of an orifice coordinate along a slope orifice coordinate is not more than 10cm, the deflection size of the bottom of the drill hole is less than 1% of the designed length, and the drilling depth is 20cm deeper than the designed hole. And after the drilling is finished, pulling out the drill rod and the drilling tool, rechecking the hole depth by using a polyethylene pipe, and blowing the holes by using high-pressure air to blow dust in the holes clean.
3. And inserting the bound prestress into the drilled anchor hole, then grouting into the anchor hole, wherein M35 cement mortar is adopted for grouting, the bottom end of the guide pipe is inserted to the bottom of the hole during grouting, and grouting can be stopped until the anchor hole overflows grout or the exhaust hole stops exhausting.
4. And (4) after grouting of the anchor hole, binding reinforcing steel bars in the construction of the anchor foundation, welding the embedded parts, and pouring anchor foundation concrete.
5. And after the anchorage foundation is poured, the anchorage beam is installed, prestressed steel strands can be tensioned when the concrete strength reaches 85%, the tensioning is carried out in stages, the tensioning is carried out in four stages of 0.25, 0.5, 0.75 and 1.1 times of design tension respectively, each stage of load is kept for 5 minutes and then enters the next stage of loading, the load lifting rate is 1/10 which should not exceed the design tension per minute, and the load unloading rate is 1/5 which should not exceed the design tension per minute. After the tensioning is finished, the prestressed anchor cable type anchorage of the cable crane is formed.
Claims (4)
1. The utility model provides a suspension bridge cable crane prestressed anchorage cable formula anchorage structure, suspension bridge is located between the canyon that mountain body formed, its characterized in that: the concrete anchor foundation is poured at the bottom of a slope body of a mountain body facing to a canyon, and two parallel anchor beams are transversely arranged on the outer wall of the anchor foundation; the multiple prestressed steel strands are divided into an upper row and a lower row which are equal in number, each row of prestressed steel strands corresponds to one anchoring beam, one end of each prestressed steel strand is anchored in a mountain, and the other end of each prestressed steel strand penetrates through the anchorage foundation and the anchoring beam and is anchored on the anchoring beam.
2. The prestressed anchor cable type anchorage structure of the suspension bridge cable crane according to claim 1, characterized in that: the anchoring beam is a round steel pipe, one side of the anchoring beam facing the anchoring foundation is welded with a box-shaped support made of a steel plate corresponding to each prestressed steel strand, one side of the anchoring beam back to the anchoring foundation is provided with a prestressed anchorage device corresponding to each prestressed steel strand, and each steel strand is anchored with one prestressed anchorage device after penetrating through one support and the anchoring beam.
3. The prestressed anchor cable type anchorage structure of the suspension bridge cable crane according to claim 1, characterized in that: each prestressed steel strand is anchored in the mountain body for a part of the length of at least 20 m.
4. The prestressed anchor cable type anchorage structure of the suspension bridge cable crane according to claim 1, characterized in that: two rows of prestressed steel strands penetrate through the anchoring base part to be parallel to each other, the part of the upper row of prestressed steel strands anchored in the mountain body inclines upwards, the part of the lower row of prestressed steel strands anchored in the mountain body inclines downwards, and an included angle of 5 degrees is formed between the part of each prestressed steel strand anchored in the mountain body and the part penetrating through the anchoring base part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920735475.3U CN210315223U (en) | 2019-05-21 | 2019-05-21 | Suspension bridge cable crane prestressed anchor cable type anchorage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920735475.3U CN210315223U (en) | 2019-05-21 | 2019-05-21 | Suspension bridge cable crane prestressed anchor cable type anchorage structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210315223U true CN210315223U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920735475.3U Active CN210315223U (en) | 2019-05-21 | 2019-05-21 | Suspension bridge cable crane prestressed anchor cable type anchorage structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210315223U (en) |
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2019
- 2019-05-21 CN CN201920735475.3U patent/CN210315223U/en active Active
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