CN108978492B - Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure - Google Patents
Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure Download PDFInfo
- Publication number
- CN108978492B CN108978492B CN201811119515.8A CN201811119515A CN108978492B CN 108978492 B CN108978492 B CN 108978492B CN 201811119515 A CN201811119515 A CN 201811119515A CN 108978492 B CN108978492 B CN 108978492B
- Authority
- CN
- China
- Prior art keywords
- steel
- tensioning
- anchoring
- hogging moment
- bundle
- 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
Classifications
-
- 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
- E01D19/00—Structural or constructional details of 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
Abstract
The invention discloses a simple support variable continuous bridge hogging moment steel beam tension connector and a bridge structure. The steel bundle tensioning connector is directly embedded in the T-shaped beam in advance along the longitudinal direction of the T-shaped beam and is tensioned in a wet joint area between the T-shaped beams; the curved steel beam in the hogging moment area of the pier top is changed into a straight beam, and the prestress loss caused by pipeline friction is reduced. The tensioning grooves are transferred to the wet joint area from the tops of the prefabricated T-beam wing plates, so that on one hand, the steel bars are prevented from being broken in the T-beam, and the influence of the reserved tensioning grooves on the bearing capacity of the T-beam is greatly reduced; on the other hand, the difference of age of the concrete in the reserved tensioning groove and the concrete around the reserved tensioning groove is greatly shortened, and the shrinkage creep stress of the concrete caused by the age difference is greatly reduced. From the construction process, the construction process of steel bundle tensioning is adjusted from the current 'tensioning before anchoring' to 'anchoring before tensioning', and the prestress loss caused by anchorage retraction is eliminated.
Description
Technical Field
The invention belongs to the field of bridge engineering, and particularly relates to a hogging moment steel beam tensioning connector for a simply supported continuous bridge and a bridge structure.
Background
The assembled simple-supported T-beam bridge is the most common bridge type of the existing middle-small span concrete beam bridge, however, the rising shrinkage joint at the bridge deck can cause unevenness and discontinuity of the bridge deck, and the erosion environment and the automobile impact effect can also cause the expansion device to have some diseases, so that a bridge engineer provides a continuous novel structural scheme of the simple-supported beam bridge deck: and (3) casting a wet joint on the pier top in situ, and after the concrete is cured to reach the designed strength, tensioning the hogging moment prestress steel beam by using a jack and the like, so that the compressive stress of the concrete at the cast-in-situ section of the pier top is reserved, and the hogging moment generated under the action of second-stage constant load and live load is responded, so that the simply-supported T-beam bridge forms a continuous system.
In 2008, the department of transportation led to a plurality of design units cooperating to make a general diagram of the structure of the upper part of the fabricated prestressed concrete T-shaped continuous beam bridge, however, because many key technologies are not solved yet, the design of the simply supported continuous T-shaped beam bridge in China has the following characteristics:
(1) related regulations of a simply supported girder bridge and a continuous girder bridge in the specification are still used as bases in the design of a general diagram, and the inherent characteristics of a structure system of the simply supported-to-continuous T-shaped girder bridge are not considered;
(2) the reinforcement arrangement mode and the reinforcement arrangement quantity of the rear continuous end part are not uniformly specified, so that the design of the reinforcement arrangement of the end part is various and has certain subjective randomness;
(3) in the construction process of a simply supported and then continuous structure system, great divergence exists, and unified knowledge is lacked for the sequence of conversion of a transverse integration system and a longitudinal system, the tension sequence of a hogging moment steel bundle and the like.
Although the prestressed concrete girder bridge which is simply supported and then continuously used in bridge engineering is increasingly widely applied, in the constructed prestressed concrete girder bridge which is changed from the simply supported prestressed concrete girder bridge to the continuously supported prestressed concrete girder bridge, the cracking phenomenon of the girder is very serious, the prestress loss is overlarge, the prestress of the hogging moment section of a part of the bridge is completely lost due to construction reasons, the diseases are more and more worried by people, and the reason is that the structure form of the hogging moment section is unreasonable, the construction quality is not over, and the prestress failure is the root cause of the diseases.
The hogging moment section is a key part for realizing continuous functions of a simply supported variable continuous T-beam bridge, the structure and construction quality of the hogging moment section determine the functions and durability of the bridge to a great extent, and the traditional hogging moment section structure mainly has the following forms:
(1) and an anchoring toothed plate is arranged on the flange plate of the T-shaped beam for anchoring. As shown in fig. 1, this form has a drawback in that: the hogging moment is required to be constructed by a hanging basket method, the tension anchoring construction is completed under the bridge deck, the process is difficult to anchor on the bridge deck, and certain safety risk exists during high pier construction; and the operation space in the hanging basket is limited, and the supervision personnel and the like can not supervise the construction quality on site.
(2) Bending the negative moment steel beam upwards and anchoring the shallow groove on the bridge floor. As shown in fig. 2, this form has a drawback in that: the anchoring tooth blocks occupy part of the integrated layer, so that the thickness of the integrated layer of the bridge deck is thin, the quality control is difficult, the bridge deck is easy to crack, the cracking position is positioned on the top plate, and certain hidden danger exists in the durability; the reinforcing steel bars on the upper edge of the bridge deck need to be cut off, and the welding quality of the reinforcing steel bars is not easy to control after the reinforcing steel bars are restored; the structural form of forming the skylight on the top plate is adopted, so that the quality problems of low longitudinal and transverse steel bar connection quality, poor concrete combination in front and rear construction and the like are caused, and the structural stress performance of the top plate at the skylight is influenced; only a flat anchor can be used, the construction quality of the embedded roof flat corrugation is not easy to control, the pipe is easy to deform, the bundle penetration is difficult, and the grouting quality is difficult to ensure; the reserved notch backfilling concrete is small in size, the backfilling quality is not easy to control, cracks are generated due to the shrinkage of the concrete when the backfilling concrete reaches the designed strength, and the durability of the anchorage device is affected by the fact that water on the bridge face easily penetrates into the anchoring area and the cracks invade into the anchoring area.
(3) Thickening the T-shaped beam wing plate and opening a deep groove on the T-shaped beam wing plate for anchoring. As shown in fig. 3 to 6, this form has a drawback in that: the reinforcing steel bars of the part excavated on the flange of the notch are not effectively connected with the reinforcing steel bars in the precast beam, so that the stress on the structure is adverse, and the safety of the structure is influenced; interference exists between the anchoring steel beam excavation notch and the flange plate steel bar arrangement; only a flat anchor can be used, the construction quality of the embedded roof flat corrugation is not easy to control, the pipe is easy to deform, the bundle penetration is difficult, and the grouting quality is difficult to ensure; the reserved notch backfilling concrete is small in size, the backfilling quality is not easy to control, cracks are generated due to the shrinkage of the concrete when the backfilling concrete reaches the designed strength, and the durability of the anchorage device is affected by the fact that water on the bridge face easily penetrates into the anchoring area and the cracks invade into the anchoring area.
(4) Thickening the T-beam wing plate and opening a hole on the T-beam wing plate to reserve a tensioning groove for anchoring. As shown in fig. 7, this form has a drawback in that: common steel bars in the T-beam wing plate must be cut off at the reserved tensioning grooves, and the bearing capacity of the T-beam is weakened; the age of the reserved stretch-draw groove concrete is greatly different from that of the surrounding concrete, and the problems of shrinkage, creep and cracking are obvious; the reserved tensioning groove return concrete has small volume and the backfilling quality is not easy to control.
Disclosure of Invention
In view of the above, the present invention provides a hogging moment steel bundle tension connector for simply supported and continuous bridges and a bridge structure, which overcome the quality problem of bridges caused by unreasonable hogging moment section structure by improving the bridge structure and construction process.
In order to achieve the purpose, the invention provides the following technical scheme:
a simple support variable continuous bridge hogging moment steel bundle tensioning connector comprises a corrugated pipe and a steel bundle inserted in the corrugated pipe, wherein one end of the steel bundle is provided with an anchoring device, and the connector also comprises a connecting and screwing mechanism matched with the other end of the steel bundle; the connecting and screwing mechanism mainly comprises a steel bundle anchor and a connecting and screwing device, and the connecting and screwing device is sleeved outside the steel bundle anchor and is in threaded fit with the periphery of the steel bundle anchor.
Furthermore, the connecting screwing device is of a sleeve structure, and two sections of threads with opposite screwing directions are arranged on the inner wall of the connecting screwing device along the axial direction.
Furthermore, a grouting hole is arranged on the connecting screwing device.
Further, the steel beam anchor is a clamping piece anchor, and the connecting screwing device is in threaded fit with the periphery of an anchor ring in the clamping piece anchor.
Furthermore, the anchoring device is an anchoring block clamped at the end of the steel bundle and an anchoring steel plate matched with the anchoring block.
Furthermore, the anchoring device also comprises a spiral steel bar which is sleeved outside the corrugated pipe and is positioned on the inner side of the anchoring steel plate.
A bridge structure with the hogging moment steel beam tension connector comprises a plurality of sections of T-shaped beams, corrugated pipes, steel beams and anchoring devices arranged on the corrugated pipes and the steel beams are prefabricated in the end heads of the T-shaped beams along the longitudinal direction of the T-shaped beams, part of the steel beams and the corrugated pipes extend out of the end heads of the T-shaped beams, and two adjacent T-shaped beams are connected end to end through a connecting and screwing mechanism and a concrete cast-in-place wet joint; the steel beam anchors in the connecting and screwing mechanism are correspondingly arranged on the steel beams extending out of the ends of the T-shaped beams, the connecting and screwing device is correspondingly sleeved on the steel beam anchors and connects and locks the head and tail two adjacent steel beam anchors, and a permanent support is arranged below cast-in-place concrete between the two T-shaped beams connected end to end.
Further, the steel bundles, the corrugated pipes and the anchoring devices thereon are prefabricated in the deck slab of the T-beam.
Further, the connecting tightener is filled with slurry for locking the two steel bundle anchors.
The invention has the beneficial effects that: the steel bundle tensioning connector is directly embedded in the T-shaped beam in advance along the longitudinal direction of the T-shaped beam and is tensioned in a wet joint area between the T-shaped beams; the curved steel beam in the hogging moment area of the pier top is changed into a straight beam, and the prestress loss caused by pipeline friction is reduced. The tensioning grooves are transferred to the wet joint area from the tops of the prefabricated T-beam wing plates, on one hand, the steel bars are prevented from being broken in the T-beam, and the influence of the (reserved) tensioning grooves on the bearing capacity of the T-beam is greatly reduced; on the other hand, the age difference of the concrete in the reserved tensioning groove and the concrete around the reserved tensioning groove is greatly shortened, and the shrinkage and creep stress of the concrete caused by the age difference are greatly reduced; in addition, the steel beam tensioner can adjust the flat anchor into a round anchor, so that the connection reliability is improved, and the prestress loss is further reduced. From the construction process, the construction process of steel bundle tensioning is adjusted from the current 'tensioning before anchoring' to 'anchoring before tensioning', and the prestress loss caused by anchorage retraction is eliminated. The grouting adjustment of the single end of the corrugated pipe is the middle grouting, the filling degree of the grouting inside the corrugated pipe is greatly improved by reducing the grouting distance, and the corrosion risk of steel bundles in the corrugated pipe is reduced.
In general, the bridge system solves the cracking problem of the concrete roof in the hogging moment section of the simply supported variable continuous T-shaped beam, eliminates the stubborn problems of large prestress and steel bundle prestress loss of the roof, simplifies the complex construction process of the hogging moment steel bundle in the hogging moment section of the simply supported variable continuous hogging moment section, solves the problems of large age difference between concrete in a construction notch/reserved tensioning groove and surrounding concrete and serious shrinkage creep cracking, and also eliminates the problem of bearing capacity reduction caused by the cutting of the roof steel bar at the construction notch/reserved tensioning groove.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic view of anchoring a T-beam flange plate with an anchor toothed plate;
FIG. 2 is a schematic view of bending up the hogging moment steel beam and anchoring shallow grooves on the bridge deck;
FIG. 3 is a schematic view of a thickened T-beam wing plate and a deep groove anchored on the T-beam wing plate;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
FIG. 6 is a cross-sectional view C-C of FIG. 3;
FIG. 7 is a schematic view of a thickened T-beam wing plate and a reserved tensioning slot for anchoring in a hole formed in the T-beam wing plate;
FIG. 8 is a schematic structural view of a steel bundle tensioning connector;
FIG. 9 is a schematic view of a bridge construction with steel bundle tensioning connectors;
FIG. 10 is a schematic view of a bridge construction with pre-reserved tension slots;
FIG. 11 is a top view of FIG. 10;
FIG. 12 is a schematic view of a bridge structure with pre-cast tension grooves;
FIG. 13 is a top view of FIG. 12;
fig. 14 is a schematic view of the connection tightening mechanism.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
A simple support variable continuous bridge hogging moment steel bundle tensioning connector comprises a corrugated pipe 1 and a steel bundle 2 inserted in the corrugated pipe 1, wherein one end of the steel bundle 2 is provided with an anchoring device 3, and the connector also comprises a connecting and screwing mechanism 4 matched with the other end of the steel bundle 2; the connecting and screwing mechanism 4 mainly comprises a steel bundle anchor 41 and a connecting and screwing device 42, wherein the connecting and screwing device 42 is sleeved outside the steel bundle anchor 41 and is in threaded fit with the periphery of the steel bundle anchor 41. The steel bundle tensioning connector changes the assembly mode of the other end, so that two adjacent steel bundles 2 can be connected together, the connecting tightener 42 in the middle is rotated by a hydraulic device, and the opposite movement of anchors at two sides is realized through a thread structure, so that the tensioning of the steel bundles is realized. When tensioning and screwing, the stretching amount of the steel bundles on the two sides and the screwing moment of the connecting and screwing mechanism 4 are used as double control conditions for tensioning control. The hydraulic device acting on the joint tightener 42 can convert the oil pressure into torque and can also dynamically display the oil pressure value, the torque value and the tension force on the steel bundle; tension force is accurately controlled through real-time monitoring.
Specifically, the tightening connector 42 is a sleeve structure, two sections of threads with opposite turning directions are axially arranged on the inner wall of the sleeve structure, each section of thread is correspondingly connected with the steel bundle anchor 41 on one side, and the two sections of threads with opposite turning directions can realize the opposite movement of the anchors on two sides and the synchronous tensioning of the steel bundles. The connector tightener 42 is provided with grouting holes, and grouting is performed inwards, so that the prestressed steel bundles are protected from being corroded, and the locking effect between the steel bundle anchor 41 and the connector tightener 42 is enhanced. Of course, the locking between the steel bundle anchor 41 and the fastening screw 42 may be performed by welding, anchoring, or other locking means, in addition to grouting, in which the fastening screw 42 is fastened to a certain position, the fastening screw 42 is primarily locked with the steel bundle anchor 41/steel bundle by welding, and then grouting is performed for secondary locking.
The steel beam anchor 41 can be formed by improving the existing anchorage device, the steel beam anchor 41 is provided with a clip anchor, the structure of the clip anchor is not improved, and only threads are arranged on the periphery of an anchor ring. In use, the connector turner 42 is threadably engaged with the outer periphery of the anchor ring in the two side clip anchors. And tensioning and screwing of the steel bundles on the two sides are realized. Of course, the size and specification of the peripheral screw thread of the clip anchor and the anchor ring should meet the use requirements.
The anchoring device 3 is composed of a conventional structure, and comprises an anchoring block 31 clamped at the end of the steel bundle 2, an anchoring steel plate 32 matched with the anchoring block 31, and a spiral steel bar 33 sleeved outside the corrugated pipe 1 and positioned on the inner side of the anchoring steel plate 32. The partial device is directly prefabricated in the T-shaped beam as an anchoring end.
A bridge structure with a steel bundle tensioning connector comprises a plurality of sections of T-shaped beams 5, wherein steel bundles 2, corrugated pipes 1 and anchoring devices 3 on the corrugated pipes are prefabricated in the end heads of the T-shaped beams along the longitudinal direction of the T-shaped beams 5, part of the steel bundles and the corrugated pipes extend out of the end heads of the T-shaped beams, and two adjacent T-shaped beams are connected end to end through a connecting and screwing mechanism 4 and cast-in-place concrete; the steel beam anchors in the connecting and screwing mechanism are correspondingly arranged on the steel beams extending out of the ends of the T-shaped beams, the connecting and screwing device is correspondingly sleeved on the steel beam anchors and connects and locks the head and tail two adjacent steel beam anchors, and a permanent support is arranged below cast-in-place concrete between the two T-shaped beams connected end to end.
Specifically, the steel bundle 2 and the corrugated pipe 1 are partially prefabricated in a T-shaped beam 5 to be used as an anchoring end; and part of the extension part is used as a tensioning end. The two sections of T-beams 5 are connected through the connecting and screwing mechanism 4 and cast-in-place concrete, namely the connecting and screwing mechanism 4 is positioned in a cast-in-place wet joint area 6 of the bridge, and the problems that the structure form of a hogging moment area is unreasonable, the construction difficulty is high, the quality is not easy to guarantee and the like in the prior art are solved through the structure.
The steel bundle 2, the bellows 1 and the anchoring means 3 thereon in this embodiment are prefabricated in the deck of the T-beam. Because the anchoring end is anchored into the T-beam in advance, and the tensioning end is positioned in the cast-in-place wet joint area 6, an anchoring toothed plate does not need to be arranged on a flange plate of the T-beam, shallow groove anchoring does not need to be carried out on a bridge deck, the wing plate of the T-beam does not need to be thickened, and a tensioning groove is reserved in a deep groove or an opening on a wing plate of the T-beam, the conventional bridge deck can meet the installation requirement of the steel beam tensioning connector.
Further, the connector tightener 42 is impregnated with grout that locks the two steel bundle anchors 41. So as to realize the locking between the steel bundle anchor 41 and the connecting tightener 42 and realize the locking of the steel bundle in the tension state.
The method for simply supporting and continuously constructing the bridge comprises the following specific steps:
(1) and directly prefabricating part of the corrugated pipe, the steel bundle and the anchoring device of the anchoring end head thereof in the T-shaped beam.
(2) And (3) erecting the prefabricated T beam on the pier according to the conventional construction flow to form a simple supported beam, wherein the corrugated pipe and the steel beam extending out of the end of the T beam are positioned in the wet joint area.
(3) Mounting a wet joint reinforcement cage in the wet joint area and reserving a tensioning groove;
(4) pouring wet joint concrete outside the tensioning groove;
(5) and connecting the two adjacent steel bundles extending out of the end of the T-shaped beam by using a steel bundle anchor and a connecting screw.
(6) And adjusting the connecting tightener to stretch the steel bundle, and locking the steel bundle anchor after reaching a stretching control condition.
(7) And filling the reserved tensioning slots.
(8) And completing the conversion from a simple beam to a continuous beam system according to the conventional construction process.
(9) And (5) bridge deck pavement in the later period.
The steel bundle tensioning connector is directly prefabricated in the T-shaped beam along the longitudinal direction of the T-shaped beam and tensioned in a wet joint area 6 between the T-shaped beams; the curved steel beam in the hogging moment area of the pier top is changed into a straight beam, and the prestress loss caused by pipeline friction is reduced. The tensioning grooves are transferred to the wet joint area from the tops of the prefabricated T-beam wing plates, on one hand, the steel bars are prevented from being broken in the T-beam, and the influence of the (reserved) tensioning grooves on the bearing capacity of the T-beam is greatly reduced; on the other hand, the age difference of the concrete in the reserved tensioning groove and the concrete around the reserved tensioning groove is greatly shortened, and the shrinkage and creep stress of the concrete caused by the age difference are greatly reduced. In addition, the steel beam tensioner can adjust the flat anchor into a round anchor, so that the connection reliability is improved, and the prestress loss is further reduced. From the construction process, the construction process of steel bundle tensioning is adjusted from the current 'tensioning before anchoring' to 'anchoring before tensioning', and the prestress loss caused by anchorage retraction is eliminated.
Because the connection tensioning position of the steel beam is positioned at the wet joint section of the two T-shaped beams in end-to-end connection, the grouting position of the corrugated pipe is adjusted to be middle grouting from the existing single-end grouting, so that the grouting distance is reduced, the plumpness of the grouting inside the corrugated pipe is greatly improved, and the corrosion risk of the steel beam in the corrugated pipe is reduced.
In general, the bridge system solves the cracking problem of the concrete roof in the hogging moment section of the simply supported variable continuous T-shaped beam, eliminates the stubborn problems of large prestress and steel bundle prestress loss of the roof, simplifies the complex construction process of the hogging moment steel bundle in the hogging moment section of the simply supported variable continuous hogging moment section, solves the problems of large age difference between concrete in a construction notch/reserved tensioning groove and surrounding concrete and serious shrinkage creep cracking, and also eliminates the problem of bearing capacity reduction caused by the cutting of the roof steel bar at the construction notch/reserved tensioning groove.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a bridge construction with hogging moment steel beam stretch-draw connector, includes a plurality of sections T roof beams and hogging moment steel beam stretch-draw connector, its characterized in that: the negative bending moment steel bundle tensioning connector comprises a corrugated pipe and a steel bundle inserted in the corrugated pipe, wherein one end of the steel bundle is provided with an anchoring device, and the other end of the steel bundle is provided with a connecting and screwing mechanism; the connecting and screwing mechanism mainly comprises a steel bundle anchor and a connecting and screwing device, and the connecting and screwing device is sleeved outside the steel bundle anchor and is in threaded fit with the periphery of the steel bundle anchor; the corrugated pipe, the steel beam and the anchoring device on the steel beam are prefabricated in the end head of the T beam along the longitudinal direction of the T beam, and part of the steel beam and the corrugated pipe extend out of the end head of the T beam, wherein the corrugated pipe and the steel beam extending out of the end head of the T beam are positioned in a wet joint area; mounting a wet joint reinforcement cage in the wet joint area and reserving a tensioning groove; firstly pouring wet joint concrete outside a tensioning groove between two adjacent T-shaped beams to connect the two sections of T-shaped beams end to end; the steel bundle anchors in the connecting and screwing mechanism are correspondingly arranged on the steel bundles extending out of the T-shaped beam end, then the connecting tighteners are correspondingly sleeved on the steel bundle anchors so as to connect and lock two adjacent steel bundles extending out of the T-shaped beam end, the steel bundle tensioning is realized by adjusting the connecting tighteners, the steel bundle anchors are locked after reaching tensioning control conditions, and then reserved tensioning grooves are filled; a permanent support is arranged below the cast-in-place concrete between the two T-shaped beams connected end to end.
2. A bridge construction with hogging moment steel strand tension connector according to claim 1, characterized in that: the connecting screwing device is of a sleeve structure, and two sections of threads with opposite screwing directions are arranged on the inner wall of the connecting screwing device along the axial direction.
3. A bridge construction with hogging moment steel strand tension connector according to claim 2, characterized in that: the connecting screwing device is provided with a grouting hole.
4. A bridge construction with hogging moment steel strand tension connector according to claim 3, characterized in that: the steel beam anchor is a clip anchor, and the connecting screwing device is in threaded fit with the periphery of an anchor ring in the clip anchor.
5. The bridge construction with hogging moment steel strand tension connector of any one of claims 1-4, wherein: the anchoring device is an anchoring block clamped at the end of the steel bundle and an anchoring steel plate matched with the anchoring block.
6. The bridge construction with hogging moment steel strand tension connector of claim 5, wherein: the anchoring device also comprises a spiral steel bar which is sleeved outside the corrugated pipe and is positioned on the inner side of the anchoring steel plate.
7. The bridge construction with hogging moment steel strand tension connector of claim 5, wherein: the steel bundles, the corrugated pipes and the anchoring devices on the corrugated pipes are prefabricated in the bridge deck of the T-shaped beam.
8. The bridge construction with hogging moment steel strand tension connector of claim 5, wherein: the connecting screw fastener is filled with slurry for locking the two steel bundle anchors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119515.8A CN108978492B (en) | 2018-09-25 | 2018-09-25 | Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119515.8A CN108978492B (en) | 2018-09-25 | 2018-09-25 | Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108978492A CN108978492A (en) | 2018-12-11 |
| CN108978492B true CN108978492B (en) | 2020-09-15 |
Family
ID=64543940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811119515.8A Active CN108978492B (en) | 2018-09-25 | 2018-09-25 | Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108978492B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110004815A (en) * | 2019-03-29 | 2019-07-12 | 辽宁省交通规划设计院有限责任公司 | A kind of non-prestressed freely-supported turns Continuous Bridge and its construction method |
| CN111379225A (en) * | 2020-03-31 | 2020-07-07 | 浙江交工集团股份有限公司 | Assembly type T beam tensioned on bridge floor by round corrugated pipe hogging moment steel beam |
| CN112252559B (en) * | 2020-09-21 | 2022-03-18 | 山东汇富建设集团建筑工业有限公司 | Fully-prefabricated prestressed concrete floor structure and prestressed assembly method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477701Y (en) * | 2001-05-24 | 2002-02-20 | 周志祥 | Connecting structure of bridge having simple support varied as continuation |
| KR100690395B1 (en) * | 2005-02-15 | 2007-03-13 | 노윤근 | Continuous Beam Construction Method of Prestressed Concrete Beam |
| CN104264787B (en) * | 2014-09-12 | 2017-02-15 | 中国中建设计集团有限公司 | Prefabricated concrete member, assembled concrete member and fabricating method through straight thread and nut locking anchor grouting sleeve connection |
| CN206233434U (en) * | 2016-11-16 | 2017-06-09 | 浙江工业大学工程设计集团有限公司 | A kind of assembled steel framework prefabricated concrete floor structure |
| CN108316122B (en) * | 2018-03-28 | 2024-04-12 | 北京市市政工程设计研究总院有限公司 | Bridge deck continuous structure of simply-supported I-shaped concrete composite beam and construction method |
-
2018
- 2018-09-25 CN CN201811119515.8A patent/CN108978492B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108978492A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108894118B (en) | Construction method of simply supported continuous bridge with steel beam tensioning connector | |
| CN108978492B (en) | Simply supported variable continuous bridge hogging moment steel bundle tensioning connector and bridge structure | |
| CN110359363B (en) | Partially-bonded prestressed assembly type self-resetting bridge pier column node and method | |
| CN109235222B (en) | Light full-assembly type large cantilever ultrahigh-performance concrete finned beam and construction method thereof | |
| CN111021227B (en) | Steel-concrete composite structure continuous box girder and manufacturing method thereof | |
| KR101053688B1 (en) | Connection device and connection construction method of prefabricated precast concrete member, and precast concrete member provided with connection device | |
| KR20100073448A (en) | Continuation structure of prestressed concrete girder bridge | |
| CN106087692A (en) | A kind of Simply supported non-uniform T negative moment of girder section structure and construction method | |
| CN109137838B (en) | Prestressed reinforcement structure of arc door support and construction method | |
| KR102140167B1 (en) | Strengthening method of concrete structures by pretensioning | |
| CN110747735A (en) | Anchoring connection device for precast concrete bridge deck of steel-concrete composite beam | |
| KR100547485B1 (en) | Continuous multi-span bridge using bridge girder units and construction method thereof | |
| KR101025388B1 (en) | Connecting Apparatus and Connecting Method of Precast Concrete Box Units and Precast Concrete Box Unit comprising Double Connecting Apparatus | |
| CN110565508B (en) | Prestressed concrete beam prefabricating method and prestressed concrete beam | |
| CN210194433U (en) | Temporary prestress structure for prefabricated section assembled bridge | |
| CN211256620U (en) | Assembled combination case roof beam | |
| CN208039073U (en) | A kind of assembled continuous box girder hogging moment steel beam anchorage zone construction | |
| KR100466017B1 (en) | The Method of Reinforce Steel Box Girder type Bridge and The Structure thereof | |
| CN216894434U (en) | Assembled steel pipe concrete inverted arch capable of adjusting tunnel bottom plate uplift | |
| CN211396284U (en) | Connecting structure of flat anchor assembly | |
| CN213926297U (en) | Prefabricated assembled lattice beam that can splice | |
| CN211396285U (en) | Round anchor assembly | |
| KR100439470B1 (en) | Beam for Bridge | |
| CN114991009B (en) | Cross connection structure between precast concrete hollow pier segments and method thereof | |
| CN220414205U (en) | Prefabricated prestressing force pressure formula anti-floating pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |