CN1740445A - External pre-stress reinforcing structure for common hollow reinforced concrete slab beam - Google Patents
External pre-stress reinforcing structure for common hollow reinforced concrete slab beam Download PDFInfo
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- CN1740445A CN1740445A CN 200510103600 CN200510103600A CN1740445A CN 1740445 A CN1740445 A CN 1740445A CN 200510103600 CN200510103600 CN 200510103600 CN 200510103600 A CN200510103600 A CN 200510103600A CN 1740445 A CN1740445 A CN 1740445A
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- plate
- baffle plate
- slab beam
- liner plate
- reinforcing structure
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Abstract
The present invention relates to external pre-stress reinforcing structure for common hollow reinforced concrete slab beam. The external pre-stress reinforcing structure includes baffles and lining boards, which are connected to the inside of the baffles to support the baffles, welded symmetrically to the end main ribs of the hollow slab beam bottom plate; drawing parts between the baffles on two ends; and cast concrete around the baffles and lining boards. The reinforcing structure can raise the strength and the rigidity of the hollow slab beam, improve crack index and raise the bearing capacity of the bridge by 30-45 %.
Description
Technical field
The present invention relates to a kind of reinforcing technique of plain bars concrete hollow board beam, specifically, relate to a kind of external prestressing strengthening structure of plain bars concrete hollow board beam.
Background technology
For the plain bars concrete hollow board beam in the present bridge construction, there is the hypodynamic phenomenon of carrying in larger proportion, makes the strength and stiffness of bridge main beam not reach designing requirement.
Summary of the invention
The purpose of this invention is to provide a kind of bearing capacity that can improve plain bars concrete hollow board beam, and the external prestressing strengthening structure of the plain bars concrete hollow board beam of strength and stiffness.
The present invention is achieved in that a kind of external prestressing strengthening structure of plain bars concrete hollow board beam, is symmetrically welded with baffle plate and the liner plate that is used for supporting baffle at place, hollow slab beam base plate master muscle two ends; Liner plate is positioned at the inboard of baffle plate and is connected with baffle plate, is provided with drawing piece between two side shields, is cast with concrete around baffle plate and liner plate.
Described liner plate can be at least two right-angled triangle steel plates, and a right-angle side of each liner plate is connected with plate washer, and another right-angle side is connected with the base plate master muscle of bridge main beam.Described drawing piece can comprise ground tackle and prestress wire, and described ground tackle is located at the outside of baffle plate, and described prestress wire passes two side shields respectively and is connected with described ground tackle.
The invention has the beneficial effects as follows: the tensile strength that has improved the hollow slab beam base plate, thereby improved the strength and stiffness of integrated hollow plate beam, improved the crack index, improved the bearing capacity of bridge, evidence, this ruggedized construction can improve bridge capacity and reach 30%～45%.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention;
Fig. 2 is an A-A sectional drawing of the present invention.
1. hollow slab beams, 2. baffle plates, 3. liner plates, 4. ground tackles, 5. prestress wires among the figure
6. high-grade concrete 7. base plate master muscle
The specific embodiment
Referring to Fig. 1, Fig. 2, the external prestressing strengthening structure of plain bars concrete hollow board beam of the present invention is the liner plate 3 that is symmetrically welded with baffle plate 2 at place, hollow slab beam 1 base plate master muscle 7 two ends and is used for supporting baffle 2; Liner plate 3 is positioned at the inboard of baffle plate 2 and is connected with baffle plate 2, is provided with drawing piece between two side shields 2, is cast with concrete 6 around baffle plate 2 and liner plate 3, and this pour concrete 6 is preferably high-grade concrete, to guarantee tensile strength.
Described liner plate 3 is at least two right-angled triangle steel plates, the quantity of liner plate 3 can be determined according to the width of hollow slab beam 1 and the quantity of base plate master muscle 7, a right-angle side of each liner plate 3 is connected with plate washer 2, and another right-angle side is connected with the base plate master muscle 7 of hollow slab beam 1; Described liner plate 3 also can be the steel plate of diagonal brace baffle plate 2, is provided with the hole of passing for drawing piece on steel plate.Described drawing piece comprises ground tackle 4 and prestress wire 5, and described ground tackle 4 is located at the outside of baffle plate 2, and described prestress wire 5 passes two side shields 3 respectively and is connected with described ground tackle 4; Described drawing piece also can be the cold-drawn bar and the fixing fixture of cold-drawn bar.
Describe the present invention with way of example above, but the invention is not restricted to above-mentioned specific embodiment, all protection domains that any improvement that the present invention did or modification are all belonged to claim of the present invention.
Claims (4)
1. the external prestressing strengthening structure of a plain bars concrete hollow board beam is characterized in that: be symmetrically welded with baffle plate (2) at place, hollow slab beam (1) base plate master muscle (7) two ends and be used for the liner plate (3) of supporting baffle (2); Liner plate (3) is positioned at the inboard of baffle plate (2) and is connected with baffle plate (2), is provided with drawing piece between two side shields (2), is cast with concrete (6) on every side at baffle plate (2) and liner plate (3).
2. the external prestressing strengthening structure of plain bars concrete hollow board beam according to claim 1, it is characterized in that: described liner plate (3) is at least two right-angled triangle steel plates, a right-angle side of each liner plate (3) is connected with plate washer (2), and another right-angle side is connected with the base plate master muscle of hollow slab beam (1).
3. the external prestressing strengthening structure of plain bars concrete hollow board beam according to claim 1 and 2, it is characterized in that: described drawing piece comprises ground tackle (4) and prestress wire (5), described ground tackle (4) is located at the outside of baffle plate (2), and described prestress wire (5) passes two side shields (3) respectively and is connected with described ground tackle (4).
4. the external prestressing strengthening structure of plain bars concrete hollow board beam according to claim 1 is characterized in that: the concrete of pouring into a mould on every side at described baffle plate (2) and liner plate (3) (6) is a high-grade concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510103600 CN1740445A (en) | 2005-09-23 | 2005-09-23 | External pre-stress reinforcing structure for common hollow reinforced concrete slab beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510103600 CN1740445A (en) | 2005-09-23 | 2005-09-23 | External pre-stress reinforcing structure for common hollow reinforced concrete slab beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1740445A true CN1740445A (en) | 2006-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510103600 Pending CN1740445A (en) | 2005-09-23 | 2005-09-23 | External pre-stress reinforcing structure for common hollow reinforced concrete slab beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1740445A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455726C (en) * | 2006-04-12 | 2009-01-28 | 四川省交通厅公路规划勘察设计研究院 | Method for reinforcing integral cast-in-situ concrete beam bridge and slab bridge by prestress |
| CN101838971B (en) * | 2009-03-17 | 2012-05-23 | 上海建泰预应力工程有限公司 | Construction method for carrying out external prestressing strengthening on bridge by transverse tensioning method |
| CN102913028A (en) * | 2012-02-01 | 2013-02-06 | 于天庆 | Concrete telegraph pole and other prefabricated concrete components capable of being easily carried and locally assembled with prestressing force |
| CN104328747A (en) * | 2013-07-23 | 2015-02-04 | 金辉 | Reinforcement method for single beam bearing of bridge and construction method thereof |
| CN105421813A (en) * | 2015-12-07 | 2016-03-23 | 中国建筑第八工程局有限公司 | External prestressing reinforcing method for concrete truss |
| CN105484171A (en) * | 2015-12-16 | 2016-04-13 | 中铁二十五局集团第三工程有限公司 | Prestress strengthening method for external cables of bridges and culverts of prefabricated frames in gradient change jacking process |
| CN108103962A (en) * | 2017-12-25 | 2018-06-01 | 河海大学 | A kind of bracing means and its construction method of concrete-bridge crackle |
| CN111101434A (en) * | 2019-12-31 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Cable-stayed bridge with tensioned midspan girder |
-
2005
- 2005-09-23 CN CN 200510103600 patent/CN1740445A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455726C (en) * | 2006-04-12 | 2009-01-28 | 四川省交通厅公路规划勘察设计研究院 | Method for reinforcing integral cast-in-situ concrete beam bridge and slab bridge by prestress |
| CN101838971B (en) * | 2009-03-17 | 2012-05-23 | 上海建泰预应力工程有限公司 | Construction method for carrying out external prestressing strengthening on bridge by transverse tensioning method |
| CN102913028A (en) * | 2012-02-01 | 2013-02-06 | 于天庆 | Concrete telegraph pole and other prefabricated concrete components capable of being easily carried and locally assembled with prestressing force |
| CN102913028B (en) * | 2012-02-01 | 2016-01-27 | 于天庆 | A kind of concrete electric pole and other prefabricated concrete elements gently can taking prestressing force assembling on the spot |
| CN104328747A (en) * | 2013-07-23 | 2015-02-04 | 金辉 | Reinforcement method for single beam bearing of bridge and construction method thereof |
| CN105421813A (en) * | 2015-12-07 | 2016-03-23 | 中国建筑第八工程局有限公司 | External prestressing reinforcing method for concrete truss |
| CN105484171A (en) * | 2015-12-16 | 2016-04-13 | 中铁二十五局集团第三工程有限公司 | Prestress strengthening method for external cables of bridges and culverts of prefabricated frames in gradient change jacking process |
| CN108103962A (en) * | 2017-12-25 | 2018-06-01 | 河海大学 | A kind of bracing means and its construction method of concrete-bridge crackle |
| CN111101434A (en) * | 2019-12-31 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Cable-stayed bridge with tensioned midspan girder |
| CN111101434B (en) * | 2019-12-31 | 2022-01-04 | 中铁二院工程集团有限责任公司 | Cable-stayed bridge with tensioned midspan girder |
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