CN111827096A - Overturn-preventing reinforcing device for single-column pier viaduct - Google Patents
Overturn-preventing reinforcing device for single-column pier viaduct Download PDFInfo
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- CN111827096A CN111827096A CN202010611201.0A CN202010611201A CN111827096A CN 111827096 A CN111827096 A CN 111827096A CN 202010611201 A CN202010611201 A CN 202010611201A CN 111827096 A CN111827096 A CN 111827096A
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- pier
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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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
- E01D2101/30—Metal
Abstract
The invention discloses an overturn-preventing reinforcing device for a single-column pier viaduct, which comprises an original pile foundation, an original bearing platform, an original pier and a bridge floor, wherein a newly-built bearing platform is arranged on one side of the original bearing platform, a newly-built pile foundation is arranged below the newly-built bearing platform, a newly-built pier is arranged on the newly-built bearing platform, and the top surface of the newly-built pier is in mutual contact with the bottom surface of one side of the bridge floor; the top of newly-built pier and former pier is connected with the girder steel that is the level setting, and the opposite side tip of girder steel is provided with the fulcrum, and the top surface of fulcrum and the opposite side bottom surface of bridge floor are contact with each other. When the bridge deck on one side of the newly-built bridge piers has the overturning trend, the newly-built bridge piers and the original bridge piers support the bridge deck together and are stressed by vertical downward pressure; when the bridge deck on the other side of the newly-built bridge pier has the overturning trend, the fulcrum on the steel beam and the original bridge pier jointly support the bridge deck, the original bridge pier is stressed by vertical downward pressure, and the newly-built bridge pier is stressed by vertical upward pulling force; the invention has the effect of preventing the bridge from overturning in two directions.
Description
Technical Field
The invention relates to the field of bridge engineering in the field of engineering construction, in particular to an anti-overturning reinforcing device for a single-pier viaduct.
Background
The single-column pier bridge is widely applied to the urban viaduct in China due to the advantages of land occupation reduction, vision field increase and attractive bridge shape. However, the single-column pier bridge has poor anti-overturning capability, and is easy to induce overturning and collapsing under the condition of truck overload.
It can be seen that, with the development of social economy, the traffic flow is increasing day by day, and especially, the truck with serious overload breaks the overpass (some overloads reach more than 200%), which causes the single-pier viaduct to have great potential safety hazard. It is necessary to reinforce the existing single-column pier viaduct in advance in part of key road sections, so as to eliminate the potential overturning hazard and prevent great economic loss and casualties.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides an anti-overturning reinforcing device for a single-column pier viaduct.
The technical scheme of the invention is as follows:
the utility model provides a reinforcing apparatus that prevents toppling of single-column pier overpass, including former pile foundation, former cushion cap, former pier and bridge face, its characterized in that: a newly-built pile cap is arranged on one side of the original pile cap, a newly-built pile foundation is arranged below the newly-built pile cap, a newly-built pier is arranged on the newly-built pile cap, the newly-built pile foundation and the newly-built pier are positioned on one side of the original pile foundation and one side of the original pier, and the top surface of the newly-built pier is in contact with the bottom surface of one side of the bridge floor; the top of the newly-built bridge pier and the top of the original bridge pier are connected with steel beams which are horizontally arranged, fulcrums are arranged at the end parts of the other sides of the steel beams, which are symmetrical to the connecting parts of the newly-built bridge pier, and the top surfaces of the fulcrums are in contact with the bottom surface of the other side of the bridge floor.
The overturn-preventing reinforcing device for the single-column pier viaduct is characterized in that: one or more newly-built pile foundations and newly-built piers are provided.
The overturn-preventing reinforcing device for the single-column pier viaduct is characterized in that: when the bridge floor of newly-built pier one side bore great eccentric load and have the tendency of toppling, newly-built pier with former pier supports jointly the bridge floor, and newly-built pier with former pier all receives vertical decurrent pressure.
The overturn-preventing reinforcing device for the single-column pier viaduct is characterized in that: when the bridge deck on the other side of the newly-built bridge pier bears large eccentric load and has the overturning trend, the fulcrum and the original bridge pier jointly support the bridge deck; the pressure that the fulcrum received passes through the girder steel transmit for former pier and newly-built pier, make former pier receives vertical decurrent pressure, and make newly-built pier receives vertical ascending pulling force.
The overturn-preventing reinforcing device for the single-column pier viaduct is characterized in that: the top surface of the newly-built pier is in contact with the bottom surface of one side of the bridge floor, but is not connected with the bottom surface of the bridge floor; the top surface of the fulcrum is in contact with the bottom surface of the other side of the bridge deck, but is not connected with the bottom surface of the other side of the bridge deck.
Newly-built cushion cap, newly-built pile foundation and newly-built pier be located one side of former cushion cap, former pile foundation and former pier, and keep away from as far as former cushion cap, former pile foundation and former pier.
The system formed by the newly-built pile foundation, the newly-built bearing platform and the newly-built bridge pier can bear vertical downward pressure or vertical upward pulling force generated by bearing larger eccentric load in different directions of the bridge floor without failure.
Compared with the prior art, the invention has the following advantages:
1. the system composed of the newly-built pile foundation, the newly-built bearing platform and the newly-built pier is separated from the original pile foundation, the original bearing platform and the original pier and is far away from the original pile foundation, so that the influence on the original foundation is small, the rigidity of the combined system of the newly-built pier and the original pier is increased, and the system has high anti-overturning capacity.
2. The top surface of the newly-built pier is in contact with the bottom surface of one side of the bridge floor, but is not connected with each other; the top surface of the supporting point is contacted with the bottom surface of one side of the bridge deck but not connected with the bottom surface of the other side of the bridge deck, so the construction of the invention has no influence on the original bridge deck, and the additional special treatment on the original bridge deck is not needed.
3. When the bridge deck on one side of the newly-built bridge piers bears larger eccentric load and has the tendency of overturning, the newly-built bridge piers and the original bridge piers support the bridge deck together, and the newly-built bridge piers and the original bridge piers are both stressed by vertical downward pressure, so that the bridge is effectively prevented from overturning; when the bridge deck on the other side of the newly-built bridge pier bears a large eccentric load and has an overturning trend, the bridge deck is supported by the fulcrums on the steel beam and the original bridge pier together, pressure borne by the fulcrums is transmitted to the original bridge pier and the newly-built bridge pier through the steel beam, the original bridge pier is stressed by vertical downward pressure, the newly-built bridge pier is stressed by vertical upward pulling force, the steel beam rotates by taking the original bridge pier as the fulcrum (similar to a lever principle), and the bridge is effectively prevented from overturning; therefore, the invention has the effect of preventing the bridge from overturning in two directions.
Drawings
FIG. 1 is a schematic view of a single-column pier bridge structure.
Fig. 2 is a schematic view of a single-column pier bridge in an overturning and collapsing state.
FIG. 3 is a front view of the bridge after the reinforcing apparatus is installed.
FIG. 4 is a schematic view of a three-dimensional structure of a bridge with a reinforcing device.
Fig. 5 is a schematic view showing the load transmission of the bridge subjected to the unbalanced load after the reinforcing device is added.
Fig. 6 is a schematic view of load transmission of the bridge subjected to unbalance loading after the reinforcing device is installed.
Description of reference numerals: 1. an original pile foundation; 2. an original bearing platform; 3. original bridge piers; 4. a bridge deck; 5. newly building a pile foundation; 6. building a bearing platform; 7. newly building a bridge pier; 8. a steel beam; 9. a fulcrum; A. a ground line. (the arrow in the figure indicates the direction in which the pier is loaded)
Detailed Description
Referring to the attached drawings, the overturn-preventing reinforcing device for the single-column pier viaduct comprises an original pile foundation 1, an original bearing platform 2, an original pier 3 and a bridge floor 4, wherein a newly-built bearing platform 6 is arranged on one side of the original bearing platform 2, a newly-built pile foundation 5 is arranged below the newly-built bearing platform 6, a newly-built pier 7 is arranged on the newly-built bearing platform 6, the newly-built pile foundation 5 and the newly-built pier 7 are positioned on one side of the original pile foundation 1 and the original pier 3, and the top surface of the newly-built pier 7 is in contact with the bottom surface of one side of the bridge floor 4; the top of newly-built pier 7 and former pier 3 is connected with girder steel 8, and girder steel 8 is the level setting, and girder steel 8 is provided with fulcrum 9 at the symmetrical opposite side tip of the position of being connected with newly-built pier 7, and the top surface of fulcrum 9 and the opposite side bottom surface of bridge floor 4 contact each other.
Fig. 3 and 4 show schematic diagrams of the single-column pier viaduct with the overturn-preventing reinforcing device.
The attached drawings only show the conditions of one newly-built pile foundation and one newly-built pier, and the quantity of the newly-built pile foundation 5 and the newly-built pier 7 can be determined according to the compression resistance and the uplift resistance calculation. In actual conditions, the number of the newly-built pile foundations 5 can be reduced by enlarging the pile diameters and the pile lengths, and the newly-built pile foundations are usually only arranged, so that the construction is more convenient.
Newly-built cushion cap 6, newly-built pile foundation 5 and newly-built pier 7 are located one side of former cushion cap 2, former pile foundation 1 and former pier 3, and keep away from former cushion cap 2, former pile foundation 1 and former pier 3 as far as, on the one hand influence less to original basis, on the other hand has increased the rigidity of newly-built pier 7 and former pier 3 combination system, has great antidumping ability. The larger the distance between the newly-built bridge pier 7 and the original bridge pier 3 is, the more beneficial the bridge overturn is to be prevented, and the size of the newly-built bridge pier 7 is reduced.
Generally, the diameter of the newly-built bridge pier 7 is greatly smaller than that of the original bridge pier 3, and the diameter and the length of the newly-built pile foundation 5 are also greatly smaller than those of the original pile foundation 1. And the larger the distance between the newly-built pier 7 and the original pier 3 is, the smaller the sizes of the newly-built pile foundation 5 and the newly-built pier 7 are.
In order to avoid large stress concentration at the bottom of the bridge deck 4, a steel plate with a large area can be arranged on the top surface of the pivot 9 and the top surface of the newly-built pier 7, a rubber sheet with a certain thickness is arranged on the upper part of the steel plate, and the top surface of the rubber sheet is in direct contact with the bottom of the bridge deck 4. This detail is not shown in the drawings.
The steel beam 8 is connected with the newly-built bridge pier 7 and the top of the original bridge pier 3 and is horizontally arranged. The newly-built bridge pier 7 is connected with the original bridge pier 3 through the steel beam 8, and the overall rigidity is improved.
When the bridge deck 4 on one side of the newly-built piers 7 bears large eccentric load and has a tendency of overturning, the newly-built piers 7 and the original piers 3 support the bridge deck 4 together, and the newly-built piers 7 and the original piers 3 are both stressed by vertical downward pressure, as shown in fig. 5. At this point, the steel beam 8 is substantially non-functional.
When the bridge deck 4 on the other side of the newly-built bridge pier 7 bears large eccentric load and has the overturning tendency, the bridge deck 4 is supported by the fulcrums 9 on the steel beam 8 and the original bridge pier 3 together; the pressure applied to the pivot 9 is transmitted to the original pier 3 and the newly-built pier 7 through the steel beam 8, so that the original pier 3 is applied with vertical downward pressure, and the newly-built pier 7 is applied with vertical upward pulling force, as shown in fig. 6. At this time, the steel beam 8 rotates (similar to the lever principle) with the original pier 3 as a pivot, and the bridge is effectively prevented from overturning.
The specific configuration of the steel beam 8, the connection with the pier, etc. can achieve the proposed functions according to the prior art, and the details thereof are not shown in the drawings. The steel beams 8 can be wrapped on the peripheries of the original bridge piers 3 and the newly-built bridge piers 7 and connected with each other.
Preferably, the steel beam 8 is hinged to the original pier 3, and the steel beam 8 is fixed to the newly-built pier 7, so that the steel beam 8 can be conveniently rotated around the original pier 3 as a pivot, and the newly-built pier 7 is subjected to vertical upward pulling force (as shown in fig. 6) similar to a lever principle. The steel beam 8 should meet the stress transfer under the action of extreme eccentric load without buckling and failure.
The top surface of the newly-built pier 7 is contacted with the bottom surface of one side of the bridge deck 4, but is not connected with each other. The top surface of the pivot 9 is in contact with the bottom surface of one side of the bridge deck 4, but is not connected with each other. The term "non-contiguous" as used herein means that there is no consolidation or hinge connection, and the two are only in contact with each other, but are essentially separated from each other, and cannot transmit tensile force, horizontal shear force and bending moment, but can transmit compressive force. Therefore, the construction of the invention has no influence on the original bridge deck and does not need to carry out additional special treatment on the original bridge deck.
A system consisting of the newly-built pile foundation 5, the newly-built bearing platform 6 and the newly-built bridge piers 7 can bear vertical downward pressure or vertical upward pulling force generated by bearing large eccentric loads at different directions of the bridge floor 4 without failure. Namely, the newly-built bridge pier 7 can bear both the vertical downward pressure induced by the extreme eccentric load and the vertical upward pulling force induced by the extreme eccentric load.
It can be seen that the present invention, although being installed only on one side of an existing bridge pier, can have a blocking effect against the overturning of the bridge in both directions. The method is characterized in that when eccentric load acts on one side of the newly-built pier 7, the newly-built pier 7 is stressed by vertical downward pressure; when an eccentric load acts on the other side opposite to the newly-built pier 7, the newly-built pier 7 is subjected to a vertically upward pulling force by the load transmission of the steel beam 8.
The larger the distance between the newly-built pier 7 and the original pier 3 is, the more beneficial the prevention of the bridge overturning is, and the reduction of the size of the newly-built pier 7 is facilitated.
The method is suitable for the situation that one side of the original bridge pier 3 is provided with a site for constructing the newly-built bridge pier 7. If one side of the original pier 3 is a green site or a non-traffic channel, a newly-built pier 7 can be constructed; if the two sides of the original bridge pier 3 are all traffic channels without empty space, the invention can not be constructed. Therefore, the method can be implemented by selecting a proper position according to the actual situation of the viaduct, and each original pier is not always required to be reinforced.
The figures only show partial shapes and partial connection modes of the single-column pier viaduct anti-overturning reinforcing device, and the shapes of all components and the connection modes of all the parts can be changed according to the proposed idea to form other related types of anti-overturning reinforcing devices for single-column pier viaducts, which belong to equivalent modifications and changes of the invention, and are not described again here.
The drawings are for illustration purposes only and are not to be construed as limiting the invention; for a better understanding of the present embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent actual product dimensions; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the present invention.
The present invention is not limited to the above embodiments, and various other equivalent modifications, substitutions and alterations can be made without departing from the basic technical concept of the invention as described above, according to the common technical knowledge and conventional means in the field.
Claims (5)
1. The utility model provides a reinforcing apparatus that prevents toppling of single-column pier overpass, including former pile foundation, former cushion cap, former pier and bridge floor, its characterized in that: a newly-built pile cap is arranged on one side of the original pile cap, a newly-built pile foundation is arranged below the newly-built pile cap, a newly-built pier is arranged on the newly-built pile cap, the newly-built pile foundation and the newly-built pier are positioned on one side of the original pile foundation and one side of the original pier, and the top surface of the newly-built pier is in contact with the bottom surface of one side of the bridge floor; the top of newly-built pier with former pier is connected with the girder steel, the girder steel be the level setting, the girder steel with the symmetrical opposite side tip in newly-built pier connection position is provided with the fulcrum, the top surface of fulcrum with the opposite side bottom surface of bridge floor contacts each other.
2. The overturn-preventing reinforcement device for the overpass of the single-pier according to claim 1, wherein: one or more newly-built pile foundations and newly-built piers are provided.
3. The overturn-preventing reinforcement device for the overpass of the single-pier according to claim 1, wherein: when the bridge floor of newly-built pier one side bore great eccentric load and have the tendency of toppling, newly-built pier with former pier supports jointly the bridge floor, and newly-built pier with former pier all receives vertical decurrent pressure.
4. The overturn-preventing reinforcement device for the overpass of the single-pier according to claim 1, wherein: when the bridge deck on the other side of the newly-built bridge pier bears large eccentric load and has the overturning trend, the fulcrum and the original bridge pier support the bridge deck together; the pressure that the fulcrum received passes through the girder steel transmit for former pier and newly-built pier make former pier receives vertical decurrent pressure, and make newly-built pier receives vertical ascending pulling force.
5. The overturn-preventing reinforcement device for the overpass of the single-pier according to claim 1, wherein: the top surface of the newly-built pier is in contact with the bottom surface of one side of the bridge floor, but is not connected with the bottom surface of the bridge floor; the top surface of the fulcrum is in contact with the bottom surface of the other side of the bridge deck, but is not connected with the bottom surface of the other side of the bridge deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010611201.0A CN111827096A (en) | 2020-06-29 | 2020-06-29 | Overturn-preventing reinforcing device for single-column pier viaduct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010611201.0A CN111827096A (en) | 2020-06-29 | 2020-06-29 | Overturn-preventing reinforcing device for single-column pier viaduct |
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| Publication Number | Publication Date |
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| CN111827096A true CN111827096A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010611201.0A Pending CN111827096A (en) | 2020-06-29 | 2020-06-29 | Overturn-preventing reinforcing device for single-column pier viaduct |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855654A (en) * | 2022-06-27 | 2022-08-05 | 四川路桥桥梁工程有限责任公司 | Stable inclined pier construction method without interrupting traffic operation |
-
2020
- 2020-06-29 CN CN202010611201.0A patent/CN111827096A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855654A (en) * | 2022-06-27 | 2022-08-05 | 四川路桥桥梁工程有限责任公司 | Stable inclined pier construction method without interrupting traffic operation |
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