CN210194659U - Arch bridge combined foundation structure - Google Patents
Arch bridge combined foundation structure Download PDFInfo
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- CN210194659U CN210194659U CN201920289621.4U CN201920289621U CN210194659U CN 210194659 U CN210194659 U CN 210194659U CN 201920289621 U CN201920289621 U CN 201920289621U CN 210194659 U CN210194659 U CN 210194659U
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- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000002689 soil Substances 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model belongs to the technical field of bridge engineering a combined foundation structure of arch bridge. The arch bridge combined foundation structure comprises an arch base foundation and an anti-push platform; the anti-push platform is arranged at the adjacent position of the arch foundation, and a horizontal connecting plate is arranged between the anti-push platform and the arch foundation in a cross joint manner; a horizontal continuous pull rod is arranged in the horizontal connecting plate, and two ends of the continuous pull rod respectively extend into the anti-push platform and the arch base to be anchored. The utility model discloses utilized considerable volume of hydrophilic platform or view revetment and great anti side rigidity, be connected it with the hunch foot that has the arch bridge, made it support the horizontal force jointly, can receive the effect of doing the job a lot of.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, a combination formula foundation structure who has thrust arched bridge is related to.
Background
The arch bridge is of a thrust structure and is provided with a tensile tie bar, and the thrust is completely or partially borne by the tie bar; the thrust of the arch bridge without the tensile tie bar is born by the abutment foundation. When the abutment foundation must bear strong thrust transmitted by the arch springing, a good foundation is required, so that how to improve the capability of the abutment foundation for resisting the thrust of the arch springing becomes a problem which needs to be solved in the design when an arch bridge is built in an area with poor geological conditions. The current solutions mainly include the following: firstly, foundation treatment is carried out, and a condensate is poured into the foundation in a certain depth or a vibration compaction method is adopted, or soft soil in a certain range is subjected to replacement and compaction, so that the horizontal resistance coefficient is improved, and the horizontal thrust resistance of the foundation is further improved; secondly, a sliding block is made, a flat plate is made behind the abutment foundation, and the horizontal thrust of the arch springing is balanced by utilizing the friction force generated at the bottom of the flat plate by the weight of the soil mass on the flat plate; and thirdly, a combined bridge abutment is made up of a front abutment and a rear abutment, wherein the front abutment base bears vertical component force transmitted by the arch springing, and the rear abutment utilizes the soil pressure and the frictional resistance of the rear abutment base to balance the horizontal thrust of the arch. The method mainly provides horizontal resistance by enhancing local soil constraint, and has large foundation deformation and high cost; the sliding resisting plate and the combined abutment are only suitable for the abutment foundation, and the excavation range of the foundation pit is large; the foundation treatment has wide application range, but the uniformity and the quality of the treated foundation are not easy to control, the value of the resistance coefficient is discrete and is inconvenient to apply because of the need of field experiments. More importantly, the pushing force of the arch is balanced by the soil resistance in a local range, and the soil body is easy to creep under the long-term load action in a soft foundation environment, so that the safety of the structure is reduced. Therefore, there is a need to find a safe, reliable, economic and reasonable arch bridge foundation form which is convenient to apply and facilitates the construction of the arch bridge with thrust.
On the other hand, the waterfront bridge is adjacent to piers and platforms, especially arch springing of an arch bridge, various hydrophilic platforms and landscape revetments are commonly arranged, and the stress of the waterfront bridge is different from that of the bridge structure, so that the waterfront bridge is generally separated from the bridge structure by arranging a seam in engineering.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simple structure economy, application scope extensively, construction convenience, safe and reliable's arch bridge combination formula foundation structure. The utility model discloses utilized considerable volume of hydrophilic platform or view revetment and great anti side rigidity, be connected it with the hunch foot that has the arch bridge, made it support the horizontal force jointly, can receive the effect of doing the job a lot of.
The utility model discloses the basic technical scheme of structure does: an arch bridge combined foundation structure comprises an arch base foundation and an anti-push platform of an arch bridge; an anti-push platform is arranged at the adjacent position of the arch foundation, and a horizontal connecting plate is arranged between the anti-push platform and the arch foundation in a cross joint mode; the horizontal connecting plate is a reinforced concrete plate; a horizontal continuous pull rod is arranged in the horizontal connecting plate, and two ends of the continuous pull rod respectively extend into the anti-push platform and the arch seat foundation for anchoring so as to improve the integrity of the combined foundation and be beneficial to the transmission of horizontal force. The upper part of the horizontal connecting plate is provided with a first longitudinal steel bar anchored into the arch foundation, and the first longitudinal steel bar is bent downwards in the horizontal connecting plate, passes through the middle part of the horizontal connecting plate to the lower part of the horizontal connecting plate and then longitudinally extends into the opposite anti-push platform for anchoring; and the second longitudinal steel bar is bent downwards in the horizontal connecting plate, passes through the middle part of the horizontal connecting plate to the lower part of the horizontal connecting plate and then longitudinally extends into the opposite arch base foundation for anchoring. The first longitudinal reinforcement may intersect the second longitudinal reinforcement or be separately and independently disposed. Through the structure, when the horizontal connecting plate cracks under the action of vertical force, the cracks are limited in a small range in the middle and adjacent positions of the cross seams, so that the combined foundation can continuously transmit the horizontal force and adapt to deformation under the vertical action of the vertical force, the rotation action and the like. The continuous pull rod, the first longitudinal steel bar and the second longitudinal steel bar are preferably epoxy coating steel bars, so that the pull rod and the steel bars are not corroded when the horizontal connecting plate cracks, and good durability is maintained. In the above technical scheme, the anchoring lengths of the continuous tie bar, the first longitudinal steel bar and the second longitudinal steel bar can be determined according to the existing technical specifications.
Based on the technical characteristics, the continuous pull rod is arranged at the middle height position of the horizontal connecting plate.
Based on the technical characteristics, the horizontal connecting plate is provided with a vertical opening with an upward opening, the vertical opening is arranged along the seam crossing direction, and the vertical opening extends downwards to the position above the continuous pull rod from the upper surface of the horizontal connecting plate. By providing the vertical opening, the structure can better adapt to deformation caused by vertical action without affecting the horizontal force transmission, and induced cracks can occur at the vertical opening and the adjacent position thereof.
Based on above-mentioned technical characteristic, as an optimization, vertical opening sets up and is suitable in horizontal connection plate's middle width position.
The utility model discloses in, the hunch seat basis can be enlarged basis or cushion cap stake basis. The thrust platform may be provided without support piles if it is provided on a relatively solid foundation. The vertical force of the arch bridge is borne by the arch foundation, and the horizontal force is borne by the arch foundation and the anti-push platform together.
Based on the technical characteristics, the supporting piles are arranged below the anti-push platform. The supporting pile supports the anti-push platform and plays a role in skid resistance.
Based on the technical characteristics, the foundation reinforcement treatment is carried out on the soil body in the peripheral range of the arch foundation and the anti-pushing platform. The foundation stabilization treatment comprises pouring a cured substance into the foundation in a certain depth or vibrating and compacting, or replacing and compacting soft soil in a certain depth, so that the reliability of resisting horizontal thrust is further improved.
Based on the technical characteristics, the anti-push platform is fully distributed on one span of the arch bridge; two ends of the connecting rod are respectively connected with two adjacent arch support bases through horizontal connecting plates.
The arrangement position of the thrust platform is not limited, and the thrust platform can be arranged on one side of the arch foundation, for example, the thrust platform can be arranged on the side close to the bank of the arch foundation or the side far away from the bank. The anti-pushing platform can also be arranged on two sides of the arch base or arranged around the arch base in a circle or arranged around the U-shaped shape of the arch base.
The utility model discloses in, hunch seat basis, anti platform and the horizontal connection board of pushing away can be under construction simultaneously. But the horizontal connecting plate is more beneficial to construction as a post-cast strip, and is beneficial to reducing the influences of settlement, concrete shrinkage and the like between the arch foundation and the anti-pushing platform in the construction period.
The utility model discloses in, anti platform that pushes away can be the part of revetment or the hydrophilic platform of view, or do revetment or view platform or other usage concurrently.
The utility model connects the arch support foundation of the arch foot of the arch bridge with the anti-push platform, which does not change the existing arch support and the foundation arrangement and greatly improves the anti-push rigidity of the whole foundation; the arrangement of the anti-thrust platform enables the horizontal thrust to act on a larger range to be diffused without being limited to a local soil body of the restraining bridge abutment, so that the creep of the local soil body is prevented, and the reliability of the arch bridge structure is improved; the anti-thrust platform can adopt a pile foundation without being limited by the type of foundation soil, and does not need foundation treatment or only carries out shallow foundation treatment on the soft foundation, thereby reducing the construction difficulty and the cost; the anti-push platform can be combined with a landscape hydrophilic platform and a revetment, and can be arranged at various positions adjacent to an arch bridge foundation in various shapes, so that a flexible and convenient creative space and an economical and applicable way are provided for landscape construction; the main structure of the arch bridge foundation and the structure of the anti-push platform are mature in technology, the connection structure between the main structure and the anti-push platform is simple, force transmission is clear, and the effect of resisting horizontal force is reliable.
To sum up, the utility model provides an arch bridge combination formula foundation structure, its safe and reliable, economical rationality, application convenience have great popularization and application value and apparent economic benefits in the construction practice of arch bridge especially in the construction of soft base large span arch bridge.
Drawings
Fig. 1 is a schematic elevation view of the modular base structure of the present invention.
Fig. 2 is a schematic plan view of the combined foundation structure of the present invention.
Fig. 3 is a detailed view of the middle horizontal connecting plate of the present invention.
Fig. 4 is a first schematic diagram of the embodiment of the present invention.
Fig. 5 is a schematic diagram of the second embodiment of the present invention.
Fig. 6 is a schematic view of a first layout elevation of the modular infrastructure of the present invention.
Fig. 7 is a first layout plan view of the modular infrastructure of the present invention.
Fig. 8 is a schematic view of a second layout elevation of the modular infrastructure of the present invention.
Fig. 9 is a second layout plan view of the modular infrastructure of the present invention.
Fig. 10 is a third layout elevation view of the modular infrastructure of the present invention.
Fig. 11 is a schematic plan view of a third arrangement of the modular infrastructure of the present invention.
Fig. 12 is a fourth arrangement elevational schematic of the modular infrastructure of the present invention.
Fig. 13 is a schematic plan view of a fourth arrangement of the modular infrastructure of the present invention.
Fig. 14 is a schematic view of a fifth arrangement elevation of the modular infrastructure of the present invention.
Fig. 15 is a schematic plan view of a fifth arrangement of the modular infrastructure of the present invention.
The numbers in the figures are illustrated as: an arch support 1; an arch foundation 2; an arch ring 3; an anti-push platform 4; a support pile 5; a horizontal connecting plate 6; a continuous pull rod 7; a vertical opening 8; a first longitudinal reinforcement 9; a second longitudinal reinforcement 10; a common platform 11.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 and 2: the main foundation of the arch bridge comprises an arch support 1 and an arch support foundation 2, the arch support is a reinforced concrete support body connected with an upper arch ring 3, and the arch support foundation 2 can be an enlarged foundation or a pile foundation of a bearing platform; the anti-push platform 4 is a reinforced concrete platform, and a supporting pile 5 is arranged below the anti-push platform; the supporting pile 5 supports the anti-thrust platform 4 and plays a role in resisting sliding; the anti-push platform 4 is arranged adjacent to the arch support foundation 2, the space between the anti-push platform and the arch support foundation is a cross seam, a horizontal connecting plate 6 is arranged on the cross seam, and the anti-push platform 4 and the arch support foundation 2 are connected into a whole; a continuous pull rod 7 is arranged in the horizontal connecting plate 6, two ends of the continuous pull rod 7 respectively extend into the anti-push platform 4 and the arch support foundation 2 for anchoring, the vertical force of the arch bridge is borne by the main foundation, and the horizontal force is borne by the arch support foundation 2 and the anti-push platform 4 together. The continuous tension rod 7 is preferably provided at a height in the middle of the plate thickness.
As shown in fig. 3: the upper part of the horizontal connecting plate 6 is provided with a first longitudinal steel bar 9 anchored into the arch foundation 2, and the first longitudinal steel bar 9 is bent downwards in the horizontal connecting plate 6, passes through the middle of the plate to the lower part of the horizontal connecting plate 6 and then longitudinally extends into the opposite anti-push platform 4 for anchoring; and a second longitudinal steel bar 10 anchored into the anti-thrust platform is arranged at the upper part of the horizontal connecting plate 6, and the second longitudinal steel bar 10 is bent downwards in the horizontal connecting plate 6, passes through the middle of the plate to the lower part of the horizontal connecting plate 6 and then longitudinally extends into the opposite arch base 2 to be anchored. A vertical opening 8 with an upward opening is arranged on the horizontal connecting plate 6; the vertical openings 8 are arranged in the cross-seam direction in a full-length mode, and the vertical openings 8 extend downwards from the upper surface of the horizontal connecting plate to the position above the continuous pull rod. By providing the vertical opening 8, the structure can better adapt to deformation caused by vertical action without affecting the horizontal force transmission, and induced cracks can occur at the vertical opening and the adjacent position thereof.
In the scheme, the foundation can be reinforced in the soil body in the peripheral range of the arch foundation and the anti-push platform. The thrust platform may be provided without support piles 5, if provided on a more solid foundation.
To realize the utility model discloses a combination formula basis, construction method can be:
as shown in fig. 4: firstly, an arch base foundation 2 and an anti-push platform 4 are respectively constructed, and a first longitudinal steel bar 9, a second longitudinal steel bar 10 and a continuous pull rod 7 of the arch base foundation 2 and the anti-push platform 4 are required to be embedded in a horizontal connecting plate 6 which is embedded in a synchronous binding mode. And secondly, properly maintaining the concrete of the poured arch support foundation 2 and the anti-pushing platform 4, and coating and protecting the exposed first longitudinal steel bars 9, the exposed second longitudinal steel bars 10 and the exposed continuous pull rods 7. As shown in fig. 5: and thirdly, watering the concrete of the flat connecting plate 6, including interface treatment, cleaning of the reinforcement cage net in the plate, reserving of the vertical opening 8, and concrete pouring and maintenance of the post-pouring belt. The construction method of the post-cast strip can be implemented by adopting the conventional technology.
Fig. 6 to 15 are examples of different arrangements of the anti-thrust platform according to the present invention. The arrangement of the anti-pushing platform is not limited, and the anti-pushing platform can be arranged in the direction along the bridge of the arch support foundation, in the direction of the transverse bridge of the arch support foundation, or in the direction along the bridge of the arch support foundation. The plane shape of the thrust platform is not limited and can be determined according to the actual conditions of various projects. The anti-pushing platform can be directly used as a revetment; the device can also be used as a part of a revetment or landscape hydrophilic platform, namely the anti-push platform is connected with other platforms.
As shown in fig. 6 and 7, the thrust platform 4 is arranged in the side span, and is connected with the abutment base on the abutment side.
As shown in fig. 8 and 9, the thrust platform 4 is arranged in the endbay, being connected to the abutment base on the far side of the shore.
As shown in fig. 10 and 11, the anti-thrust platform 4 is connected with other common platforms 11 and arranged around the foundation 2 of the arch in the water. The anti-push platform 4 is arranged in the direction of the transverse bridge, the common platform is arranged in the direction of the bridge 11, and the common platform 11 is connected with the anti-push platform 4 but disconnected with the arch base 2. Of course, the anti-thrust platform 4 may also be arranged both in the transverse bridge direction and in the longitudinal bridge direction of the abutment foundation 2, i.e. the anti-thrust platform 4 is arranged around the abutment foundation by four sides of horizontal webs.
As shown in fig. 12 and 13, the anti-pushing platform 4 is distributed over the whole side span of the multi-span continuous arch bridge and is respectively connected with two adjacent arch base foundations 2 of the side span.
As shown in fig. 14 and 15, the anti-thrust platform 4 is arranged in a U-shape to half-surround the arch bridge foundation 2.
The arrangement of the anti-push platform can be determined according to actual engineering allowable conditions, stress conditions of the arch foundation and geological conditions of site geotechnical engineering. Can be independently arranged, and can also be connected with other common platforms into a whole to jointly complete revetment and hydrophilicity or meet other building function requirements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. A combined foundation structure of an arch bridge, comprising an arch base foundation (2) of the arch bridge, characterized in that: an anti-thrust platform (4) is arranged at the adjacent position of the arch foundation (2), and a horizontal connecting plate (6) is arranged between the anti-thrust platform and the arch foundation in a cross joint manner; the horizontal connecting plate (6) is a reinforced concrete plate; a horizontal continuous pull rod (7) is arranged in the horizontal connecting plate (6), and two ends of the continuous pull rod (7) respectively extend into the anti-push platform (4) and the arch base (2) for anchoring; a first longitudinal steel bar (9) anchored into the arch foundation (2) is arranged at the upper part of the horizontal connecting plate (6), and the first longitudinal steel bar (9) bends downwards in the horizontal connecting plate (6) and passes through the middle part of the horizontal connecting plate (6) to the lower part of the horizontal connecting plate (6) and then longitudinally extends into the opposite anti-push platform (4) for anchoring; and the upper part of the horizontal connecting plate (6) is provided with a second longitudinal steel bar (10) anchored into the anti-pushing platform (4), and the second longitudinal steel bar (10) is bent downwards in the horizontal connecting plate (6) and passes through the middle part of the horizontal connecting plate (6) to the lower part of the horizontal connecting plate (6) and then longitudinally extends into the opposite arch base (2) for anchoring.
2. An arch bridge modular infrastructure, as claimed in claim 1, wherein: the continuous pull rod (7) is arranged at the middle height position of the horizontal connecting plate (6).
3. An arch bridge modular infrastructure according to claim 1 or 2, wherein: the horizontal connecting plate (6) is provided with a vertical opening (8) with an upward opening, the vertical opening (8) is arranged along the whole length in the seam crossing direction, and the vertical opening (8) extends downwards from the upper surface of the horizontal connecting plate to the position above the continuous pull rod.
4. An arch bridge modular infrastructure according to claim 3, wherein: the vertical opening (8) is arranged in the middle width position of the horizontal connecting plate (6).
5. An arch bridge modular infrastructure, as claimed in claim 1, wherein: and a support pile (5) is arranged below the anti-push platform (4).
6. An arch bridge modular infrastructure according to claim 1 or 5, wherein: and carrying out foundation reinforcement treatment on soil bodies in the peripheral range of the arch foundation (2) and the anti-thrust platform (4).
7. An arch bridge modular infrastructure, as claimed in claim 1, wherein: the anti-push platform (4) is fully distributed on one span of the arch bridge; two ends of the connecting rod are respectively connected with two adjacent arch support foundations (2) through the horizontal connecting plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289621.4U CN210194659U (en) | 2019-03-07 | 2019-03-07 | Arch bridge combined foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920289621.4U CN210194659U (en) | 2019-03-07 | 2019-03-07 | Arch bridge combined foundation structure |
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| Publication Number | Publication Date |
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| CN210194659U true CN210194659U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920289621.4U Withdrawn - After Issue CN210194659U (en) | 2019-03-07 | 2019-03-07 | Arch bridge combined foundation structure |
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| CN (1) | CN210194659U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778893A (en) * | 2019-03-07 | 2019-05-21 | 上海勘测设计研究院有限公司 | Arch bridge combined type base configuration and its construction method |
| CN111877127A (en) * | 2020-08-25 | 2020-11-03 | 中交路桥华南工程有限公司 | Construction method of continuous arch bridge |
-
2019
- 2019-03-07 CN CN201920289621.4U patent/CN210194659U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778893A (en) * | 2019-03-07 | 2019-05-21 | 上海勘测设计研究院有限公司 | Arch bridge combined type base configuration and its construction method |
| CN109778893B (en) * | 2019-03-07 | 2024-07-23 | 上海勘测设计研究院有限公司 | Arch bridge combined foundation structure and construction method thereof |
| CN111877127A (en) * | 2020-08-25 | 2020-11-03 | 中交路桥华南工程有限公司 | Construction method of continuous arch bridge |
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