CN210288075U - Structure is changed to steel pipe concrete truss arch bridge web member - Google Patents
Structure is changed to steel pipe concrete truss arch bridge web member Download PDFInfo
- Publication number
- CN210288075U CN210288075U CN201920887544.2U CN201920887544U CN210288075U CN 210288075 U CN210288075 U CN 210288075U CN 201920887544 U CN201920887544 U CN 201920887544U CN 210288075 U CN210288075 U CN 210288075U
- Authority
- CN
- China
- Prior art keywords
- steel
- web member
- strength
- steel frame
- replaced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a replacement structure of a web member of a steel pipe concrete truss arch bridge, which comprises a high-strength steel bar or a prestressed steel strand, a high-strength nut or an anchorage device, an upper support steel frame and a lower support steel frame, wherein the root of the upper support steel frame is spot-welded outside the intersection point of an upper chord member of a steel pipe concrete arch rib and the web member to be replaced, the root of the lower supporting steel frame is spot-welded at the outer side of the intersection point of the lower chord member of the concrete filled steel tube arch rib and the web member to be replaced, the high-strength threaded steel bar or the prestressed steel strand is axially connected with the upper supporting steel frame and the lower supporting steel frame along the web member to be replaced, the high-strength threaded steel bar or the prestressed steel strand exerts force by using a high-strength bolt or a jack, and use high-strength nut or ground tackle temporary anchoring on last supporting steelframe and lower supporting steelframe, the utility model discloses simple structure, reasonable in design guarantees the structure atress safety of former bridge, and construction convenience, mechanical properties and economic benefits are good.
Description
Technical Field
The invention relates to a replacement structure of a web member of a steel tube concrete truss arch bridge.
Background
Since 1990, China built the first concrete-filled steel tube arch bridge, the great Sichuan vigorous bridge. The advantages of the novel bridge type are suitable for the requirement of large-scale infrastructure construction in China, and once the novel bridge type is appeared, the novel bridge type is popular and rapidly developed. The concrete-filled steel tube arch bridge is widely applied to the construction of roads, municipal administration and railway bridges in China.
For a concrete-filled steel tube arch bridge with a large span, in order to reduce the self weight of an arch rib and improve the bearing efficiency of the structure, the arch rib generally adopts a truss structure. For the truss type structure, the fatigue problem of the connecting nodes of the chord members and the web members is very critical, and the problem of fatigue damage of the web members of the existing part of the steel pipe concrete truss arch bridge is solved. With the service time of the steel pipe concrete node gradually reaching the fatigue life, how to solve the fatigue problem of the steel pipe concrete node and ensure the work of the in-service steel pipe concrete arch bridge becomes more and more important.
Disclosure of Invention
The invention provides a replacement structure of a web member of a steel tube concrete truss arch bridge.
The invention adopts the scheme that the replacement structure of the web member of the steel pipe concrete truss arch bridge comprises a high-strength corrugated steel bar or a prestressed steel strand, a high-strength nut or an anchorage device, an upper support steel frame and a lower support steel frame, wherein the root of the upper support steel frame is spot-welded on the outer side of the intersection point of an upper chord member of a steel pipe concrete arch rib and the web member to be replaced, the root of the lower support steel frame is spot-welded on the outer side of the intersection point of a lower chord member of the steel pipe concrete arch rib and the web member to be replaced, the high-strength threaded steel bar or the prestressed steel strand is axially connected with the upper support steel frame and the lower support steel frame along the web member to be replaced, and the high-strength threaded steel bar or the prestressed steel strand exerts force by using a high-strength bolt or a jack and is temporarily anchored on.
Further, the upper and lower support steel frames have the same structure and comprise rectangular steel plates at the top and arc-shaped steel plates at the roots, and the arc-shaped steel plates are connected with the rectangular steel plates through stiffening steel plates.
Furthermore, a plurality of pore channels are arranged on the long edges of the two sides of the rectangular steel plate, and the pore channels are arranged at equal intervals along the width direction of the rectangular steel plate.
Further, the rectangular steel plate is perpendicular to the axis of the web member to be replaced.
Furthermore, a strain gauge or a strain gauge sheet is arranged on the web member to be replaced.
Compared with the prior art, the invention has the following beneficial effects: simple structure, reasonable in design guarantees the structure atress safety of former bridge, and construction convenience, mechanical properties and economic benefits are good.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a view taken along line A-A of FIG. 1;
fig. 3 is a partially enlarged view of portion B of fig. 1.
In the figure: 1-upper supporting steel frame, 2-lower supporting steel frame, 3-high-strength twisted steel, 4 strain gauges, 5-arch rib upper chord, 6-arch rib lower chord, 7-web member to be replaced, 8-high-strength nut, 9-rectangular steel plate, 10-stiffening steel plate and 11-arc steel plate.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-3, the structure for replacing the web member of the steel tube concrete truss arch bridge comprises a high-strength steel bar or a prestressed steel strand, a high-strength nut or an anchorage, an upper support steel frame and a lower support steel frame, wherein the root of the upper support steel frame is spot-welded on the outer side of the intersection point of the upper chord member of the steel tube concrete arch rib and the web member to be replaced, the root of the lower support steel frame is spot-welded on the outer side of the intersection point of the lower chord member of the steel tube concrete arch rib and the web member to be replaced, the high-strength threaded steel bar or the prestressed steel strand is axially connected with the upper support steel frame and the lower support steel frame along the web member to be replaced, and the high-strength threaded steel bar or the prestressed steel strand applies force by using a high-strength bolt or a.
In this embodiment, the upper and lower support steel frames have the same structure, and each of the upper and lower support steel frames includes a rectangular steel plate at the top and an arc-shaped steel plate at the root, and the arc-shaped steel plates are welded with the rectangular steel plate into a whole or made into a whole through a stiffening steel plate.
In this embodiment, a plurality of holes are formed in the long edges of the two sides of the rectangular steel plate, and the holes are arranged at equal intervals along the width direction of the rectangular steel plate.
In the embodiment, the rectangular steel plate is perpendicular to the axis of the web member to be replaced, the width of the rectangular steel plate in the plane of the arch rib is about 50cm, the length outside the plane is about 30cm longer than the diameter of the chord member of the arch rib on each side, and the thickness of the steel plate is about 2-3 cm; the rectangle steel sheet should respectively reserve about 5 high strength thread steel or prestressing steel strand wires pore at the edge on two long limits, the pore is arranged along rectangle steel sheet width direction equidistance, the diameter of the arc steel sheet of root equals arch rib chord member diameter, the arc length is 1/3 of arch rib chord member girth, thickness is about 2~3cm, set up the steel sheet stiffening rib between rectangle steel sheet and the arc steel sheet, along rectangle steel sheet length direction, set up stiffening steel sheet at every about 10cm equidistance, along rectangle steel sheet width direction, set up stiffening steel sheet at every about 30cm equidistance, stiffening steel sheet thickness is about 1~2 cm.
In this embodiment, a strain gauge or a strain gauge is installed on the web member to be replaced, so as to monitor the stress condition of the web member when the high-strength twisted steel bar or the prestressed steel strand exerts force.
During construction:
step 1: spot welding the root of the upper support steel frame outside the intersection point of the upper chord member of the arch rib and the web member to be replaced, spot welding the root of the lower support steel frame outside the intersection point of the lower chord member of the arch rib and the web member to be replaced, and enabling the central point of the rectangular steel plate of the upper support steel frame and the central point of the rectangular steel plate of the lower support steel frame to be on the extension line of the axis of the web member to be replaced;
step 2: polishing the middle part of the web member to be replaced, and then installing a vibrating wire strain gauge or attaching a resistance-type strain gauge along the axis direction;
and step 3: the method comprises the following steps that high-strength threaded steel bars or prestressed steel strands axially penetrate through ducts reserved in an upper supporting steel frame and a lower supporting steel frame along a web member to be replaced, the high-strength threaded steel bars are screwed up by high-strength nuts to gradually apply force, the prestressed steel strands are tensioned by jacks to gradually apply force, the strain change condition of the web member to be replaced is synchronously measured in the tensioning process of screwing up the high-strength nuts or the jacks, and when the axial force of the web member to be replaced is completely unloaded, the high-strength threaded steel bars or the prestressed steel strands are temporarily fixed by the high-strength nuts or anchors;
and 4, step 4: cutting a web member to be replaced, polishing a welding seam between the web member and a chord member, positioning a new web member, enabling the axis of the new web member to coincide with the axis of the original web member, welding the new web member with the upper chord member and the lower chord member of the arch rib, wherein the size of the new web member is larger than that of the original web member so as to ensure that the new welding seam avoids the original welding seam; the new web member should be slightly larger than the original web member
And 5: and gradually loosening the high-strength nut or the jack and the anchorage device to gradually unload the high-strength threaded steel bars or the prestressed steel strands, respectively removing the upper and lower support steel frames from the upper and lower arch ribs after complete unloading, polishing the left welding seams, and performing anticorrosive coating according to the original structure.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a structure is changed to steel pipe concrete truss arch bridge web member, includes high strength line reinforcing bar or prestressing steel strand wires, high strength nut or ground tackle, its characterized in that: the high-strength threaded steel bars or the prestressed steel strands are axially connected with the upper supporting steel frame and the lower supporting steel frame along the web members to be replaced, and are subjected to force application by high-strength bolts or jacks and temporarily anchored on the upper supporting steel frame and the lower supporting steel frame by high-strength nuts or anchors.
2. The structure of replacing web members of a concrete filled steel tube truss arch bridge according to claim 1, wherein: the upper supporting steel frame and the lower supporting steel frame are the same in structure and respectively comprise a rectangular steel plate located at the top and an arc-shaped steel plate located at the root, and the arc-shaped steel plates are connected with the rectangular steel plates through stiffening steel plates.
3. The concrete filled steel tube truss arch bridge web member replacement structure as claimed in claim 2, wherein: a plurality of pore canals are arranged on the long edges of the two sides of the rectangular steel plate at equal intervals along the width direction of the rectangular steel plate.
4. The concrete filled steel tube truss arch bridge web member replacement structure as claimed in claim 3, wherein: the rectangular steel plate is perpendicular to the axis of the web member to be replaced.
5. The concrete filled steel tube truss arch bridge web member replacement construction as claimed in any one of claims 1 to 4, wherein: and a strain gauge or a strain gauge sheet is arranged on the web member to be replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887544.2U CN210288075U (en) | 2019-06-13 | 2019-06-13 | Structure is changed to steel pipe concrete truss arch bridge web member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887544.2U CN210288075U (en) | 2019-06-13 | 2019-06-13 | Structure is changed to steel pipe concrete truss arch bridge web member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210288075U true CN210288075U (en) | 2020-04-10 |
Family
ID=70096907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920887544.2U Active CN210288075U (en) | 2019-06-13 | 2019-06-13 | Structure is changed to steel pipe concrete truss arch bridge web member |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210288075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219230A (en) * | 2019-06-13 | 2019-09-10 | 福州大学 | Concrete Filled Steel-tube Truss Arch Bridge web member replacement construction and construction method |
-
2019
- 2019-06-13 CN CN201920887544.2U patent/CN210288075U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219230A (en) * | 2019-06-13 | 2019-09-10 | 福州大学 | Concrete Filled Steel-tube Truss Arch Bridge web member replacement construction and construction method |
| CN110219230B (en) * | 2019-06-13 | 2024-02-13 | 福州大学 | Steel pipe concrete truss arch bridge web member replacement structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203729193U (en) | Low tower stay cable reinforced T-type rigid framework system with suspension beams | |
| CN109750791B (en) | Assembled large cantilever steel structure | |
| CN103046754A (en) | Construction method for abutting high-altitude long-span roof pipe trusses by adjustable temporary support | |
| CN201169752Y (en) | Steel structure anchoring steering system of external prestress for reinforcing old bridge | |
| CN210288075U (en) | Structure is changed to steel pipe concrete truss arch bridge web member | |
| CN110219230B (en) | Steel pipe concrete truss arch bridge web member replacement structure and construction method | |
| CN103243863A (en) | Tension anchoring system of pre-stressed wire reinforcing column and construction method | |
| CN201746781U (en) | Diagonal draw type bracket for cast-in-place of continuous beam | |
| CN112376558A (en) | Anchor rope and anchor backing plate and anchor rope construction method | |
| CN205955228U (en) | Prestressing force stretch -draw and anchor of carbon cloth | |
| CN105672688A (en) | Splicing wood structure pre-stress reinforcing device and construction method thereof | |
| CN214033704U (en) | Anchor rope and anchor backing plate | |
| CN214328474U (en) | Prestressed V-shaped truss steel-concrete composite structure bridge | |
| CN109610349B (en) | PC box girder web plate reinforcing structure with built-in obliquely-woven mesh and method | |
| CN104790299A (en) | Internal-span unsupported convenient construction support and method for bridge cast-in-place box beam | |
| CN211666084U (en) | Prefabricated assembled hybrid beam | |
| CN211735097U (en) | Prestressing force bent cap stretch-draw end template system of consolidating | |
| CN211079916U (en) | Anchoring system for suspender of tied-rod arch bridge | |
| CN218405065U (en) | Vertical prestress wire installation positioner of continuous rigid frame bridge segment construction | |
| CN107558733B (en) | The construction method of post-concreted expansion strip lower die frame system dismounting synchronous with periphery support for shuttering | |
| CN217870069U (en) | Prestressed reinforcement structure in bridge web thickening body | |
| CN212561179U (en) | Tool for stretching and drawing cable-stayed bridge steel cable tower anchoring screw | |
| CN220927530U (en) | Device for rapidly positioning tensioning end of corrugated pipe | |
| CN204728212U (en) | Bridge cast-in-situ box-beam is across the convenient construction bracket of interior nothing supporting | |
| CN217426122U (en) | Active balance type cable tower concrete tooth block anchoring structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |