CN211646353U - Integral bridge pile foundation structure adopting ECC concrete - Google Patents
Integral bridge pile foundation structure adopting ECC concrete Download PDFInfo
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- CN211646353U CN211646353U CN201922218859.0U CN201922218859U CN211646353U CN 211646353 U CN211646353 U CN 211646353U CN 201922218859 U CN201922218859 U CN 201922218859U CN 211646353 U CN211646353 U CN 211646353U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The utility model discloses a monoblock bridge pile foundation structure of ECC concrete, including pile foundation upper portion and pile foundation lower part, the pile foundation upper portion includes central steel core concrete and fixes the shear force key on central steel core concrete periphery wall, pile foundation lower part includes a section of upper portion and a section of central steel core concrete lower part periphery wall fixed connection's steel reinforcement cage and pours the ordinary cement concrete body on the steel reinforcement cage, pour the ECC concrete body on the steel core concrete periphery wall. The utility model discloses the bearing and deformability of pile foundation have been improved greatly, the utility model discloses starting from improving the pile foundation structure promptly, the effectual anti horizontal deformability of traditional ordinary concrete pile foundation of having solved is weak, and the defect that power consumption ability is not strong effectively improves the horizontal deformability of pile foundation, and the power consumption ability under the atress condition, strengthens the anti-seismic performance of whole bridge.
Description
The technical field is as follows:
the utility model relates to an adopt whole bridge pile foundation structure of ECC concrete.
Background art:
along with the development of economy and social progress, the requirements of people on the construction of traffic infrastructures are higher, bridges serve as key links of infrastructures and have a great significance in national production and life, the design technology of bridges is continuously developed along with the times, and the requirements of people on bridges are subtly changed from the original requirements of meeting mountain open roads and water bridges only to meet the requirements of daily traffic and transportation to the requirements of paying more attention to economy, durability, comfort, attractiveness and the like. The expansion joint of the traditional bridge is the most easily damaged part in the bridge structure due to the fact that the use environment is severe and the expansion joint is exposed in the atmosphere for a long time. Meanwhile, the expansion joint is difficult to repair after being damaged, and the maintenance cost is very expensive, so that the requirements of people on economy and durability of the bridge structure are difficult to meet. Meanwhile, the existence of the expansion joint is also one of the important factors influencing the driving comfort. The whole bridge is produced by the transportation of the bridge for the reasons.
The integral bridge is connected into a whole by the upper structure and the lower structure, and the horizontal reciprocating load is mainly born by the bridge abutment and the pile foundation for supporting the bridge abutment under the action of earthquake or temperature load. Therefore, the deformation resistance of the pile foundation plays an important role in the deformation of the whole bridge. In foreign countries, H-shaped steel piles with better deformability are mostly adopted as pile foundations of the integral bridge, and compared with reinforced concrete pile foundations, the H-shaped steel piles have better anti-seismic performance and deformability. However, due to the national conditions, most of domestic bridge pile foundations adopt reinforced concrete pile foundations, so that the bearing and deformation capacity of the reinforced pile foundations is very important.
The invention content is as follows:
an object of the utility model is to provide an adopt whole bridge pile foundation structure of ECC concrete and working method thereof promptly, this adopt whole bridge pile foundation structure of ECC concrete can improve the bearing and deformability of pile foundation greatly, improves the anti-seismic performance of pile foundation.
The utility model discloses a whole bridge pile foundation structure of ECC concrete, its characterized in that: including pile foundation upper portion and pile foundation lower part, the pile foundation upper portion includes central steel core concrete and fixes the shear force key on central steel core concrete periphery wall, pile foundation lower part includes a section of upper portion and a section of central steel core concrete lower part periphery wall fixed connection's steel reinforcement cage and pours the ordinary cement concrete body on the steel reinforcement cage, pour the ECC concrete body on the steel core concrete periphery wall.
Further, the central steel tube concrete comprises a steel tube and a concrete body poured in the steel tube.
Further, the shear key is a T-shaped metal piece, and the small end of the T-shaped metal piece is perpendicularly welded to the outer circumferential wall surface of the steel pipe.
Further, the shear keys are fixed to the outer circumferential wall surface of the steel pipe in an array.
Furthermore, the lower part of the pile foundation extends into one fifth of the upper part of the pile foundation.
Furthermore, the steel reinforcement cage comprises a plurality of vertical bars arranged along the length direction of the pile foundation and stirrups fixed on the peripheries of the vertical bars in a surrounding mode at intervals.
Further, above-mentioned steel reinforcement cage includes that a plurality of grudging posts and the spiral that arrange along pile foundation length direction are fixed around establishing the stirrup in the grudging post periphery.
The utility model discloses a pile foundation lower part includes a section of upper portion and a section of center steel pipe concrete lower part periphery wall fixed connection's steel reinforcement cage and pours the ordinary cement concrete body on the steel reinforcement cage, has pour the ECC concrete body on the center steel pipe concrete periphery wall, has improved the bearing and the deformability of pile foundation greatly, the utility model discloses starting from improving pile foundation structure promptly, the effectual traditional ordinary concrete pile foundation of having solved is weak in anti horizontal deformability, and the defect that power consumption ability is not strong effectively improves the horizontal deformability of pile foundation, and the power consumption ability under the atress condition, the anti-seismic performance of reinforcing whole bridge.
Description of the drawings:
FIG. 1 is a schematic diagram of a pile foundation structure (before a common cement concrete body is poured);
FIG. 2 is a schematic diagram of a pile foundation structure (before ECC concrete is poured);
FIG. 3 is a cross-sectional view of a pile foundation structure;
FIG. 4 is a schematic diagram comparing pile failure patterns using the inventive construction with those of the prior art;
the reference numbers in the figures illustrate: 1. a shear key; 2. concrete filled steel tubes at the center; 3. a body of ordinary cement concrete; 4. erecting reinforcement bars of a reinforcement cage; 5. a reinforcement cage stirrup; 6. an ECC concrete body; 7. and (4) a reinforcement cage.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a monoblock bridge pile foundation structure of ECC concrete includes pile foundation upper portion A and pile foundation lower part B, pile foundation upper portion A includes central steel core concrete 2 and fixes shear key 1 on central steel core concrete periphery wall, pile foundation lower part includes a section of upper portion and a section of central steel core concrete lower part periphery wall fixed connection's steel reinforcement cage 7 and pours the ordinary cement concrete body 3 on the steel reinforcement cage, pour ECC concrete body 6 on the central steel core concrete periphery wall, compare in the ordinary concrete pouring of whole pile foundation adoption integral type, the limit tensile strain of this application is its hundreds of times, and it has super high toughness and the ability of resisting horizontal deformation, and the contact of central steel core concrete 2 and ECC concrete body 6 can be guaranteed in arranging of shear key.
In one embodiment, the central steel tube concrete 2 includes a steel tube 201 and a concrete body 202 poured in the steel tube, and the steel tube 201 may be a cylindrical or square-column steel tube.
In one embodiment, the shear key 1 is a T-shaped metal piece, the small end 101 of the T-shaped metal piece is vertically welded to the peripheral wall surface of the steel pipe, the shear key 1 can also be in the form of a rectangular block and the like, the T-shaped shear key can be a bolt, the bolt is convenient to obtain, and the cost is low.
In one embodiment, the shear keys are fixed on the outer circumferential wall surface of the steel pipe in an array arrangement mode, 5-10 shear keys are arranged on one circumference, and the distance between every two adjacent shear keys in the length direction of the pile foundation can be 3-10 cm.
One of them embodiment, above-mentioned pile foundation lower part B stretches into pile foundation upper part A fifth department, stretches into pile foundation upper part A fifth department through pile foundation lower part B, and the upper and lower two parts pile foundation zonulae occludens that make is in the same place, has guaranteed common atress.
One of them embodiment, above-mentioned steel reinforcement cage 7 includes that many steel reinforcement cage studs 4 and the interval that arrange along pile foundation length direction encircle to fix the steel reinforcement cage stirrup 5 in the stud periphery, and this steel reinforcement cage stirrup 5 is the annular form, and adjacent steel reinforcement cage stirrup 5 has the determining deviation, can be 5-30 centimetres usually, and 4-8 can be arranged at 7 circumferencial directions of steel reinforcement cage for this steel reinforcement cage stirrup 4, and steel reinforcement cage stirrup 5 and steel reinforcement cage stud 4 carry out welded fastening at the cross section.
In another embodiment, the reinforcement cage includes a plurality of vertical bars arranged along the length direction of the pile foundation and stirrups spirally fixed around the vertical bars, and the stirrups of the embodiment are spirally arranged by one steel bar and are welded and fixed at the positions where the vertical bars and the stirrups clamp fork are positioned.
The utility model discloses a construction method of integral bridge pile foundation structure of ECC concrete, integral bridge pile foundation structure that adopts ECC concrete includes pile foundation upper portion and pile foundation lower part, pile foundation upper portion includes central steel pipe concrete and fixes the shear force key on central steel pipe concrete periphery wall, pile foundation lower part includes the steel reinforcement cage of upper portion one section and central steel pipe concrete lower part one section periphery wall fixed connection and pours the ordinary cement concrete body on the steel reinforcement cage, pour the ECC concrete body on the steel reinforcement cage of central steel pipe concrete periphery wall; during construction, a section of the lower portion of the steel pipe and a section of the upper portion of the steel reinforcement cage are welded and fixed, the periphery of the steel pipe and the periphery of the steel reinforcement cage are provided with dies for forming the lower portion of the pile foundation and the upper portion of the pile foundation, common cement concrete bodies are filled in the steel pipe and poured on the steel reinforcement cage, ECC concrete bodies are poured in the section of the steel pipe after solidification and maintenance, and the pile foundation is formed after solidification and maintenance.
In one embodiment, the shear key is welded and fixed on the outer circumferential wall of the steel pipe in advance.
In one embodiment, the central steel tube concrete is prepared by pouring a steel tube and a concrete body in the steel tube in advance, and the central steel tube concrete is prepared in advance, so that the arrangement of site construction can be reduced, and the construction efficiency can be improved.
Because ECC is a fiber reinforced cement-based composite material, has high ductility and strict crack width control, the traditional concrete is almost inflexible and has high brittleness and rigidity, the strain capacity is only 0.1%, and the strain capacity of ECC exceeds 3%, therefore, an ECC concrete body 6 is poured on the outer peripheral wall of the central steel pipe concrete, so that the integral bridge pile foundation is firmer, more durable and longer in duration than the traditional concrete; and has self-healing properties, self-healing by the use of carbon dioxide and rain; and is about 20-40% lighter than common concrete.
The utility model discloses from improving the pile foundation structure, the effectual anti horizontal deformability who has solved traditional ordinary concrete pile foundation is weak, and the defect that power consumption ability is not strong has adopted the ECC concrete's of this application structure whole bridge pile foundation promptly after, will effectively improve the anti horizontal deformability of pile foundation, and the power consumption ability under the atress condition, the anti-seismic performance of reinforcing whole bridge.
The utility model discloses have structure simple process, maneuverability is high, and the application is strong to and can extensively apply to in the bridge engineering in the aspect of the pile foundation structure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The utility model provides an adopt whole bridge pile foundation structure of ECC concrete which characterized in that: including pile foundation upper portion and pile foundation lower part, the pile foundation upper portion includes central steel core concrete and fixes the shear force key on central steel core concrete periphery wall, pile foundation lower part includes a section of upper portion and a section of central steel core concrete lower part periphery wall fixed connection's steel reinforcement cage and pours the ordinary cement concrete body on the steel reinforcement cage, pour the ECC concrete body on the steel core concrete periphery wall.
2. The integral bridge pile foundation structure adopting ECC concrete according to claim 1, wherein: the central steel tube concrete comprises a steel tube and a concrete body poured in the steel tube.
3. The integral bridge pile foundation construction using ECC concrete according to claim 2, wherein: the shear key is a T-shaped metal piece, and the small end of the metal piece is vertically welded on the peripheral wall surface of the steel pipe.
4. The integral bridge pile foundation construction using ECC concrete according to claim 2, wherein: the shear keys are fixed on the peripheral wall surface of the steel pipe in an array arrangement mode.
5. The integral bridge pile foundation structure adopting ECC concrete according to claim 1, wherein: the lower part of the pile foundation extends into one fifth of the upper part of the pile foundation.
6. The integral bridge pile foundation structure adopting ECC concrete according to claim 1, wherein: the steel reinforcement cage includes that many founds and the interval that arrange along pile foundation length direction encircle the stirrup of fixing in the founds periphery.
7. The integral bridge pile foundation structure adopting ECC concrete according to claim 1, wherein: the steel reinforcement cage includes that many founds and the spiral that arrange along pile foundation length direction are fixed around establishing the stirrup in the founds periphery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922218859.0U CN211646353U (en) | 2019-12-12 | 2019-12-12 | Integral bridge pile foundation structure adopting ECC concrete |
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| CN201922218859.0U CN211646353U (en) | 2019-12-12 | 2019-12-12 | Integral bridge pile foundation structure adopting ECC concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847160A (en) * | 2019-12-12 | 2020-02-28 | 福州大学 | Integral bridge pile foundation structure adopting ECC concrete and construction method thereof |
| CN113309293A (en) * | 2021-06-07 | 2021-08-27 | 四川大学 | Compound muscle reinforcing ECC-cross stiffening rib square steel tube hollow column |
| CN113323150A (en) * | 2021-06-07 | 2021-08-31 | 四川大学 | Compound muscle reinforcing ECC-compound square steel tube hollow column |
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2019
- 2019-12-12 CN CN201922218859.0U patent/CN211646353U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847160A (en) * | 2019-12-12 | 2020-02-28 | 福州大学 | Integral bridge pile foundation structure adopting ECC concrete and construction method thereof |
| CN113309293A (en) * | 2021-06-07 | 2021-08-27 | 四川大学 | Compound muscle reinforcing ECC-cross stiffening rib square steel tube hollow column |
| CN113323150A (en) * | 2021-06-07 | 2021-08-31 | 四川大学 | Compound muscle reinforcing ECC-compound square steel tube hollow column |
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