CN111155449A - Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method - Google Patents
Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method Download PDFInfo
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- CN111155449A CN111155449A CN202010025414.5A CN202010025414A CN111155449A CN 111155449 A CN111155449 A CN 111155449A CN 202010025414 A CN202010025414 A CN 202010025414A CN 111155449 A CN111155449 A CN 111155449A
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- tooth block
- anchoring tooth
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a prefabricated UHPC anchoring tooth block for external prestress reinforcement and a construction method thereof, which are anchoring technical means for external prestress reinforcement of an original concrete structure. The method is characterized in that an original structure is reinforced by using an external prestress through a factory-prefabricated UHPC (ultra high Performance concrete) anchoring block, and the specific method comprises the following steps: firstly, a shearing force notch is formed in the outer wall of an original concrete bridge web plate, and chiseling treatment is carried out; prefabricating a UHPC anchoring block in a factory; mounting the prefabricated UHPC anchoring block to a designed position, and coating mortar or epoxy resin glue on a shear notch and an interface; penetrating and tensioning finish rolling twisted steel bars for connection; and penetrating and tensioning the external prestressed tendons. Compared with the traditional external prestressed anchoring tooth block, the prefabricated UHPC anchoring block has small size, high strength, simple structure and reliable quality; the construction speed is high, and the method is a reliable technical means for realizing external prestress reinforcement of the concrete structure.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and a construction method.
Background
The external prestress reinforcement of a concrete structure is a commonly used reinforcement means at present, and can generate good reinforcement effect, but the general cast-in-place concrete anchor block has the disadvantages of complex structure, large size, low construction speed, low construction quality, difficult guarantee of reinforcement effect and frequent damage to the original structure.
Disclosure of Invention
In order to solve the problems, the invention discloses a prefabricated UHPC anchoring tooth block for external prestress reinforcement and a construction method thereof, which are easy to construct, good in integrity, high in quality guarantee and high in reliability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a construction method of a prefabricated UHPC anchoring tooth block for external prestress reinforcement comprises the following steps:
1) the UHPC anchoring tooth block is manufactured in an industrialized mode, a finish rolling twisted steel hole channel is reserved during manufacturing, and steam curing is carried out for 28 days;
2) the method comprises the following steps of (1) opening holes and grooving openings at positions of external prestressed tendons of an anchor body designed on an original concrete structure, and performing chiseling treatment;
3) mounting a prefabricated UHPC anchoring tooth block to a designed position by utilizing lifting equipment, coating mortar or epoxy resin glue in a shear groove and an interface, and placing the UHPC anchoring tooth block in a notch;
4) longitudinally penetrating and tensioning finish rolling twisted steel to connect the UHPC anchoring tooth block with the original concrete structure;
5) and transversely tensioning the external prestressed tendons to finish the reinforcement of the original bridge structure.
Based on the steps, the UHPC prefabricated anchoring tooth block has higher tensile strength, the external beam anchoring end adopts the square anchoring base plate, only a small amount of spiral stirrups are arranged near the anchoring end, and stirrups are not arranged at other positions, so that the structure is simplified, the production speed is improved, and the complicated construction process of using the horn-shaped anchoring base plate in the common concrete anchoring tooth block is avoided.
The UHPC prefabricated anchoring tooth block is integrally of a square structure, a convex block is arranged at the rear end of the UHPC prefabricated anchoring tooth block to facilitate matching with a notch, finish-rolled twisted steel ducts are arranged at the front end and the rear end (longitudinally), a prestressed tendon is transversely fixed inside the UHPC anchoring tooth block, one end of the prestressed tendon extends out of the UHPC anchoring tooth block, the other end of the prestressed tendon is fixed outside a square anchor backing plate, a spiral stirrup is arranged on the periphery of the prestressed tendon, and the spiral stirrup is close to one side of the square anchor backing plate.
The prefabricated UHPC anchoring tooth block is suitable for a concrete box girder web plate or a T-shaped girder web plate.
The prefabricated UHPC anchoring tooth block is connected with the original structure in a mode of shearing notches and stretching finish rolled threaded steel bars, so that the connection effect is good, the reliability is high, the construction speed is high, and the damage of a common bar planting method to the original structure is avoided.
The invention has the beneficial effects that:
1. the UHPC has high tensile strength, can effectively resist the splitting force and the spalling force generated in the tooth block due to the tensile force of the external cable, so that a square anchor backing plate can be adopted, only a small number of spiral stirrups can be arranged at the anchoring end, and no stirrups are arranged at other positions, thereby reducing the size of the anchoring block, simplifying the structure and improving the production speed.
2. The UHPC anchoring tooth block adopts a factory prefabricated production method, has reliable quality, avoids the complicated procedures of on-site mold erecting and pouring, and accelerates the construction speed.
3. The prefabricated anchoring tooth block is connected with the original beam body through the shear notch and the stretching and finishing twisted steel, the integrity is good, the connection is reliable, and the damage of the conventional bar planting means to the original structure is avoided.
Drawings
FIG. 1 is an elevational view of the present invention;
FIG. 2 is a plan view of a prefabricated-cast-in-place composite UHPC anchor block construction;
fig. 3 is a perspective view of the present invention.
List of reference numerals:
1 is an original concrete structure (a bridge structure box girder or a T-shaped girder web plate); 2, prefabricating a UHPC anchoring tooth block; 3 is an interface shear notch; 4, finish rolling the twisted steel; 5 is a square anchor backing plate; 6 is a spiral stirrup; and 7 is an external prestressed tendon.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in the figure, the construction method of the prefabricated UHPC anchoring tooth block for external prestress reinforcement, which is disclosed by the invention, comprises the following steps:
1) the method comprises the following steps of (1) industrially manufacturing a prefabricated UHPC (ultra high performance concrete) anchoring tooth block 2, reserving a finish rolling twisted steel 4 hole channel during manufacturing, arranging a convex block at the rear end of the prefabricated UHPC anchoring tooth block for facilitating the matching of a notch 3, fixing a prestressed tendon 7 in the prefabricated UHPC anchoring tooth block 2, extending one end of the prestressed tendon out of the UHPC anchoring tooth block 2, fixing the other end of the prestressed tendon outside a square anchor backing plate 5, arranging a spiral stirrup 6 at the periphery of the prestressed tendon, enabling the spiral stirrup 6 to be close to one side of the square anchor backing plate;
2) the position of the anchor external prestressed tendon is designed on the original concrete structure 1, and a hole and a notch 3 are opened and chiseled;
3) mounting a prefabricated UHPC anchoring tooth block to a designed position by utilizing lifting equipment, coating mortar or epoxy resin glue in a shear groove and an interface, and placing a convex block at the rear end of the UHPC anchoring tooth block in a groove opening 3;
4) longitudinally penetrating and tensioning the finish rolling twisted steel 4 to connect the UHPC anchoring tooth block with the original concrete structure 1;
5) and transversely tensioning the external prestressed tendons 7 to finish the reinforcement of the original bridge structure.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (3)
1. A construction method of a prefabricated UHPC anchoring tooth block for external prestress reinforcement is characterized by comprising the following steps: the method comprises the following steps:
1) the method comprises the following steps of (1) opening holes and grooving openings at positions of external prestressed tendons of an anchor body designed on an original concrete structure, and performing chiseling treatment;
2) the UHPC anchoring tooth block is manufactured in an industrialized mode, a finish rolling twisted steel hole channel is reserved during manufacturing, and steam curing is carried out for 28 days;
3) mounting a prefabricated UHPC anchoring tooth block to a designed position by utilizing lifting equipment, coating mortar or epoxy resin glue in a shear groove and an interface, and placing the UHPC anchoring tooth block in the notch in the step (1);
4) longitudinally penetrating and tensioning the finish rolling twisted steel to connect the UHPC anchoring tooth block with the original concrete structure;
5) and transversely tensioning the external prestressed tendons to finish the reinforcement of the original bridge structure.
2. The construction method of the prefabricated UHPC anchoring tooth block for external prestress reinforcement according to claim 1, is characterized in that: the prefabricated UHPC anchoring tooth block is suitable for a concrete box girder web plate or a T-shaped girder web plate.
3. The prefabricated UHPC anchor block for in vitro pre-stress reinforcement of claim 1, wherein: the prefabricated UHPC anchoring tooth block is integrally of a square structure, a convex block is arranged at the rear end of the prefabricated UHPC anchoring tooth block, a notch convenient to match is formed in the rear end of the prefabricated UHPC anchoring tooth block, a finish-rolled twisted steel duct is longitudinally arranged, a prestressed tendon is transversely fixed inside the UHPC anchoring tooth block, one end of the prestressed tendon extends out of the UHPC anchoring tooth block, the other end of the prestressed tendon is fixed outside a square anchor backing plate, a spiral stirrup is arranged on the periphery of the prestressed tendon, and the spiral stirrup is close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025414.5A CN111155449A (en) | 2020-01-10 | 2020-01-10 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025414.5A CN111155449A (en) | 2020-01-10 | 2020-01-10 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
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| Publication Number | Publication Date |
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| CN111155449A true CN111155449A (en) | 2020-05-15 |
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| CN202010025414.5A Pending CN111155449A (en) | 2020-01-10 | 2020-01-10 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1271954B (en) * | 1964-03-11 | 1968-07-04 | Bayer Ag | Concrete structures coated with synthetic resins that shrink when hardened |
| CN201265214Y (en) * | 2008-09-12 | 2009-07-01 | 上海城建建设实业(集团)有限公司 | Steel plate anchorage block used for external pre-stress reinforcement structure |
| KR20090115481A (en) * | 2008-05-02 | 2009-11-05 | 한국건설기술연구원 | Construction method using arch type hybrid girder |
| KR20100069839A (en) * | 2008-12-17 | 2010-06-25 | 재단법인 포항산업과학연구원 | Precast anchorage block and prestressed concrete member with the same |
| CN202116988U (en) * | 2011-04-08 | 2012-01-18 | 广东工业大学 | Anchor fixing structure in external prestressed reinforcing T-shaped rigid frame bridge box girder |
| CN103104053A (en) * | 2013-03-08 | 2013-05-15 | 郑州大学 | Assembled concrete shear wall and construction method thereof |
| CN103215894A (en) * | 2013-04-26 | 2013-07-24 | 中铁第一勘察设计院集团有限公司 | Mobile temporary prestress tension anchor block |
| CN203270466U (en) * | 2012-11-02 | 2013-11-06 | 广东建科建筑工程技术开发有限公司 | Reinforcing apparatus for pre-stress of concrete bridge |
| CN204715226U (en) * | 2015-05-31 | 2015-10-21 | 西安公路研究院 | External prestressing strengthening based on steel plate-concrete anchor block constructs |
| CN105569372A (en) * | 2016-02-04 | 2016-05-11 | 广东工业大学 | Device and method for enhancing composite reinforced concrete through prestress fiber |
| CN205907616U (en) * | 2016-07-25 | 2017-01-25 | 河南省交通科学技术研究院有限公司 | Hollow slab bridge transversely slowly coheres prestressed reinforcement system |
| CN208748674U (en) * | 2018-08-30 | 2019-04-16 | 中国建筑第七工程局有限公司 | Mortise and tenon prefabricated section is had enough to meet the need for temporary construction fence basis |
| CN208899301U (en) * | 2018-09-25 | 2019-05-24 | 郑州大学 | Consider the box beam of external prestressing strengthening |
| CN109900563A (en) * | 2019-01-28 | 2019-06-18 | 绍兴文理学院 | Oversize anchor structure face shearing test method |
-
2020
- 2020-01-10 CN CN202010025414.5A patent/CN111155449A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1271954B (en) * | 1964-03-11 | 1968-07-04 | Bayer Ag | Concrete structures coated with synthetic resins that shrink when hardened |
| KR20090115481A (en) * | 2008-05-02 | 2009-11-05 | 한국건설기술연구원 | Construction method using arch type hybrid girder |
| CN201265214Y (en) * | 2008-09-12 | 2009-07-01 | 上海城建建设实业(集团)有限公司 | Steel plate anchorage block used for external pre-stress reinforcement structure |
| KR20100069839A (en) * | 2008-12-17 | 2010-06-25 | 재단법인 포항산업과학연구원 | Precast anchorage block and prestressed concrete member with the same |
| CN202116988U (en) * | 2011-04-08 | 2012-01-18 | 广东工业大学 | Anchor fixing structure in external prestressed reinforcing T-shaped rigid frame bridge box girder |
| CN203270466U (en) * | 2012-11-02 | 2013-11-06 | 广东建科建筑工程技术开发有限公司 | Reinforcing apparatus for pre-stress of concrete bridge |
| CN103104053A (en) * | 2013-03-08 | 2013-05-15 | 郑州大学 | Assembled concrete shear wall and construction method thereof |
| CN103215894A (en) * | 2013-04-26 | 2013-07-24 | 中铁第一勘察设计院集团有限公司 | Mobile temporary prestress tension anchor block |
| CN204715226U (en) * | 2015-05-31 | 2015-10-21 | 西安公路研究院 | External prestressing strengthening based on steel plate-concrete anchor block constructs |
| CN105569372A (en) * | 2016-02-04 | 2016-05-11 | 广东工业大学 | Device and method for enhancing composite reinforced concrete through prestress fiber |
| CN205907616U (en) * | 2016-07-25 | 2017-01-25 | 河南省交通科学技术研究院有限公司 | Hollow slab bridge transversely slowly coheres prestressed reinforcement system |
| CN208748674U (en) * | 2018-08-30 | 2019-04-16 | 中国建筑第七工程局有限公司 | Mortise and tenon prefabricated section is had enough to meet the need for temporary construction fence basis |
| CN208899301U (en) * | 2018-09-25 | 2019-05-24 | 郑州大学 | Consider the box beam of external prestressing strengthening |
| CN109900563A (en) * | 2019-01-28 | 2019-06-18 | 绍兴文理学院 | Oversize anchor structure face shearing test method |
Non-Patent Citations (2)
| Title |
|---|
| 徐家和: "《建筑施工实例应用手册 》", 31 January 1998, 中国建筑工业出版社 * |
| 杨涛: "《公路工程质量通病及防治措施》", 28 February 2017, 北京理工大学出版社 * |
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Application publication date: 20200515 |
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