CN215052032U - Prefabricated assembled pier of steel pipe concrete cavity intermediate layer - Google Patents
Prefabricated assembled pier of steel pipe concrete cavity intermediate layer Download PDFInfo
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- CN215052032U CN215052032U CN202121231573.7U CN202121231573U CN215052032U CN 215052032 U CN215052032 U CN 215052032U CN 202121231573 U CN202121231573 U CN 202121231573U CN 215052032 U CN215052032 U CN 215052032U
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Abstract
The utility model relates to a prefabricated assembled pier of steel pipe concrete cavity intermediate layer, include: the method comprises the following steps: prefabricated pier stud, outer steel sheet, hollow steel pipe, vertical reinforcing bar, stirrup and grout sleeve, wherein: and the outer layer steel plate is coated on the outer surface of the prefabricated pier stud. The two ends of the hollow steel pipe are sealed, the hollow steel pipe is longitudinally embedded in the prefabricated pier column, and the hollow steel pipe is located at the section centroid of the prefabricated pier column. And a plurality of longitudinal steel bars are longitudinally arranged in the prefabricated pier stud, and the stirrups are fixed on the longitudinal steel bars. The inner wall of the grouting sleeve is provided with threads, and the grouting sleeve is sleeved on the lower portion of the longitudinal steel bar. The grouting material is filled in a gap between the grouting sleeve and the longitudinal steel bar. The pier not only reduces the dead weight of the pier column, improves the ductility of the pier column, and enhances the energy consumption capability of the pier column under the action of horizontal reciprocating load. And the binding power between the longitudinal steel bar and the grouting material is enhanced, so that the steel bar is not easy to generate binding slip when being pressed.
Description
Technical Field
The utility model relates to a concrete filled steel tube pier field especially relates to a prefabricated assembled pier of concrete filled steel tube cavity intermediate layer.
Background
The information disclosed in the background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information constitutes prior art that is already known to a person of ordinary skill in the art.
The concrete-filled steel tube bridge pier is a classic combined member, but the energy consumption capability of the common solid concrete-filled steel tube bridge pier under the action of horizontal reciprocating load is not obviously improved compared with that of the common concrete bridge pier, the self weight of a pier column is further increased due to the addition of the steel tubes, and the deformation of the pier column concrete can be restrained under the action of various loads. In practical engineering, for a pier column with a relatively large slenderness ratio, the most important factor influencing the bearing capacity of the pier column is not the pressure resistance but the bending resistance of the pier column. Concrete at the section centroid part of a common solid steel tube concrete pier often cannot exert the strength of the pier, and the bending resistance and ductility of the pier are not high, so that waste is caused to a certain extent. In addition, the construction speed of the cast-in-place concrete filled steel tube pier is low, and the quality of the components is uneven. In conclusion, the existing solid steel tube concrete pier has the defects of poor energy consumption and seismic resistance, small ductility of a combined member, incapability of exerting strength of concrete at the section centroid part of the member and the like.
SUMMERY OF THE UTILITY MODEL
To foretell problem, the utility model provides a prefabricated assembled pier of steel pipe concrete cavity intermediate layer, this kind of pier not only reduce the pier stud dead weight, have improved the ductility of pier stud, have strengthened the power consumption ability of pier stud under the reciprocal load effect of level, have strengthened the cohesive force between longitudinal reinforcement and the grout material moreover, are difficult for producing when making the reinforcing bar pressurized and bond and slide. In order to achieve the above object, the technical solution of the present invention is as follows.
The utility model provides a precast assembled pier of steel pipe concrete cavity intermediate layer, includes: prefabricated pier stud, outer steel sheet, hollow steel pipe, vertical reinforcing bar, stirrup and grout sleeve, wherein: and the outer layer steel plate is coated on the outer surface of the prefabricated pier stud. The two ends of the hollow steel pipe are sealed, the hollow steel pipe is longitudinally embedded in the prefabricated pier column, and the hollow steel pipe is located at the section centroid of the prefabricated pier column. And a plurality of longitudinal steel bars are longitudinally arranged in the prefabricated pier stud, and the stirrups are fixed on the longitudinal steel bars. The inner wall of the grouting sleeve is provided with threads, and the grouting sleeve is sleeved on the lower portion of the longitudinal steel bar. The grouting material is filled in a gap between the grouting sleeve and the longitudinal steel bar.
Further, the grouting sleeve is a seamless steel pipe, and the grouting material is UHPC (ultra high performance concrete) grouting material which can be better bonded with longitudinal steel bars.
Furthermore, the inner wall of the outer layer steel plate is connected with stiffening ribs which are longitudinally distributed, and the stiffening ribs are inserted into the prefabricated pier stud. Can make through setting up the stiffening rib and be connected more firmly between outer steel sheet and the prefabricated pier stud, the wholeness is stronger, bucking when preventing outer steel sheet pressurized.
Further, HRB400 grade steel bars and HPB300 grade steel bars are adopted as the longitudinal steel bars and the stirrups respectively.
Further, the lower end face of the prefabricated pier stud is fixed on a top steel plate of the bearing platform, and the grouting sleeve is connected with the top steel plate.
Further, prefabricated pier stud cuboid structure, hollow steel pipe is the circular steel tube.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a wrap up outer steel sheet on prefabricated pier stud surface, exert radial restraint to the pier stud concrete, reduce pier stud concrete along the radial deformation of pier stud under the vertical load effect to improve the resistance to compression bearing capacity of pier stud, and set up buckleing when outer steel sheet pressurized in the stiffening rib of outer steel sheet can prevent. Meanwhile, the outer steel plate can also enhance the energy consumption capacity of the pier column under the action of horizontal reciprocating load, and improve the shock resistance of the pier.
(2) The utility model discloses an adopt the steel pipe to replace the concrete at the cross-section centroid position of prefabricated pier stud, alleviateed the dead weight of pier stud, improved the ductility of pier stud, the power consumption ability of reinforcing pier stud under the reciprocal load effect of level has strengthened bending resistance and ductility of pier stud under the load effect, has improved prefabricated component's economic nature.
(3) The utility model discloses a set up the screw thread in grout sleeve, can effectively strengthen the adhesion force between vertical reinforcing bar and the grout material, make vertical reinforcing bar be difficult for producing when the pressurized and bond and slide, make grout sleeve's wholeness ability obtain showing and promote. In addition, the grouting sleeve is connected with the bearing platform and UHPC grouting material is adopted, so that the connection requirement of the large-diameter longitudinal steel bar is met.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic structural diagram of a prefabricated steel pipe concrete hollow sandwich fabricated pier in the embodiment.
FIG. 2 is a top view of the prefabricated steel pipe concrete hollow sandwich bridge pier in the embodiment.
Fig. 3 is a sectional view taken along line a-a in fig. 1.
Fig. 4 is a sectional view taken along line B-B in fig. 1.
The labels in the figures represent: 1-prefabricated pier stud, 2-outer steel plate, 3-hollow steel pipe, 4-longitudinal steel bar, 5-stirrup, 6-grouting sleeve, 7-UHPC grouting material, 8-stiffening rib, 9-bearing platform, 10-top steel plate and 11-foundation pile.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and do not limit the structure, but merely facilitate the description of the present invention, and do not indicate or imply that the device or element being referred to needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As mentioned above, the existing solid steel tube concrete pier has the disadvantages of poor energy consumption and seismic resistance, small ductility of the combined member, incapability of exerting the strength of the concrete at the section centroid part of the member and the like, and is not beneficial to the development of the pier. Therefore, the utility model provides a precast assembled pier of steel pipe concrete cavity intermediate layer now combines specification attached drawing and specific embodiment to further explain this kind of pier.
Referring to fig. 1 to 4, there is illustrated a concrete filled steel tube hollow sandwich prefabricated assembly type pier comprising a prefabricated pier stud 1, an outer steel plate 2, a hollow steel tube 3, longitudinal steel bars 4, stirrups 5 and grouting sleeves 6, wherein:
prefabricated pier stud 1 cuboid structure, its vertical top surface steel sheet 10 of fixing on cushion cap 9 upper surface, cushion cap 9 fixed connection is on the deciding face of foundation pile 11, and makes both zonulae occludens in the foundation pile 11 embedding cushion cap 9. The outer steel plate 2 is tightly wrapped on the outer surface of the prefabricated pier stud 1, namely, the prefabricated pier stud 1 is wholly enclosed in the cylindrical outer steel plate 2. Through tightly wrapping up the outer steel sheet of one deck on prefabricated pier stud 1's surface, exert radial restraint to pier stud concrete, make its operating condition for multidirectional pressurized, reduce pier stud concrete along the radial deformation of pier stud under the vertical load effect to improve the resistance to compression bearing capacity of pier stud, simultaneously, outer steel sheet also can strengthen the power consumption ability of pier stud under the reciprocal load effect of level, improves the shock resistance of pier.
The hollow steel pipe 3 is a circular steel pipe with two closed ends (if the closed ends are realized by welding steel plates at two ports of the steel pipe and the like, concrete is prevented from entering the hollow steel pipe 3 during pouring), and the hollow steel pipe 3 is longitudinally embedded in the prefabricated pier stud 1 and is positioned at the section centroid part of the prefabricated pier stud 1. In a traditional concrete-filled steel tube pier, the section centroid part of the pier is solid concrete, but the solid concrete often cannot exert the strength of the pier, so that the bending resistance and the ductility of the pier are not high, and waste is caused to a certain extent. And the hollow steel pipe 3 is adopted to replace concrete at the section centroid part of the prefabricated pier stud 1, so that the dead weight of the pier stud is reduced, the ductility of the pier stud is improved, and the energy consumption capability of the pier stud under the action of horizontal reciprocating load and the bending resistance and ductility of the pier stud under the action of load are enhanced.
In order to further strengthen the strength of the prefabricated pier column 1, a plurality of longitudinal steel bars 4 are longitudinally embedded in the prefabricated pier column 1, and the stirrups 5 are fixedly connected to the longitudinal steel bars 4. The grouting sleeve 6 is a seamless steel pipe and is sleeved on the lower portion of the longitudinal steel bar 4, screw threads are formed in the inner wall of the grouting sleeve 6, UHPC grouting material 7 is filled in a gap between the grouting sleeve 6 and the longitudinal steel bar 4, and the grouting sleeve 6 is connected with the top steel plate 10. Through set up the screw thread in grout sleeve 6, can effectively strengthen the adhesion stress between longitudinal reinforcement 4 and grout material 7, make longitudinal reinforcement 4 be difficult for producing the bonding when pressurized and slide, make grout sleeve 6's wholeness ability obtain showing and promote. The longitudinal steel bars 4 and the stirrups 5 are HRB400 grade steel bars and HPB300 grade steel bars respectively. Through grout sleeve 6 and cushion cap 9 connection and fill UHPC grout material in the clearance between grout sleeve 6 and longitudinal reinforcement 4, satisfied with the connection demand of major diameter longitudinal reinforcement.
With continued reference to fig. 1 to 4, in other embodiments, the inner wall of the outer steel plate 2 is connected with longitudinally distributed stiffening ribs 8, and the stiffening ribs 8 are inserted into the prefabricated pier 1. Can make to be connected more firmly between outer steel sheet 2 and the prefabricated pier stud 1 through setting up stiffening rib 8, the wholeness is stronger, buckling when preventing outer steel sheet 2 pressurized.
Finally, it should be understood that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. The utility model provides a precast assembled pier of steel pipe concrete cavity intermediate layer, includes:
prefabricating a pier stud;
the outer layer steel plate is coated on the outer surface of the prefabricated pier stud;
the two ends of the hollow steel pipe are closed, the hollow steel pipe is longitudinally embedded in the prefabricated pier stud, and the hollow steel pipe is positioned at the section centroid of the prefabricated pier stud;
the longitudinal steel bars are longitudinally arranged in the prefabricated pier column; and
the grout sleeve, the screw thread has on grout sleeve's the inner wall, and grout sleeve cover is in the lower part of vertical reinforcing bar, and has filled the grout material in the clearance between grout sleeve and the vertical reinforcing bar.
2. The precast concrete filled steel tubular hollow sandwich assembled pier according to claim 1, wherein the grouting sleeve is a seamless steel tube.
3. The precast concrete filled steel tube hollow interlayer assembled pier according to claim 1, wherein the grouting material is ultra-high performance concrete.
4. The precast concrete filled steel tube hollow sandwich assembled pier according to claim 1, wherein the longitudinal steel bars and the stirrups are HRB400 and HPB300 grade steel bars, respectively.
5. The precast concrete filled steel tubular hollow interlayer pier as claimed in claim 1, wherein the precast pier column is of a cuboid structure, and the hollow steel tube is a round steel tube.
6. The precast concrete filled steel tube hollow sandwich fabricated pier according to any one of claims 1 to 5, wherein the lower end surface of the precast pier stud is fixed on a top steel plate of a bearing platform, and the grouting sleeve is connected with the top steel plate.
7. The precast concrete filled steel hollow sandwich fabricated pier according to any one of claims 1 to 5, further comprising stirrups fixed to the longitudinal bars.
8. The precast concrete filled steel tube hollow sandwich fabricated pier according to any one of claims 1 to 5, wherein stiffening ribs are connected to the inner wall of the outer steel plate and distributed longitudinally, and the stiffening ribs are inserted into the precast pier stud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121231573.7U CN215052032U (en) | 2021-06-03 | 2021-06-03 | Prefabricated assembled pier of steel pipe concrete cavity intermediate layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121231573.7U CN215052032U (en) | 2021-06-03 | 2021-06-03 | Prefabricated assembled pier of steel pipe concrete cavity intermediate layer |
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| Publication Number | Publication Date |
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| CN215052032U true CN215052032U (en) | 2021-12-07 |
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| CN202121231573.7U Active CN215052032U (en) | 2021-06-03 | 2021-06-03 | Prefabricated assembled pier of steel pipe concrete cavity intermediate layer |
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| CN (1) | CN215052032U (en) |
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2021
- 2021-06-03 CN CN202121231573.7U patent/CN215052032U/en active Active
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