CN211256634U - Socket-and-spigot self-resetting multi-section prefabricated bridge pier - Google Patents
Socket-and-spigot self-resetting multi-section prefabricated bridge pier Download PDFInfo
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- CN211256634U CN211256634U CN201921479493.6U CN201921479493U CN211256634U CN 211256634 U CN211256634 U CN 211256634U CN 201921479493 U CN201921479493 U CN 201921479493U CN 211256634 U CN211256634 U CN 211256634U
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Abstract
The utility model provides a socket joint type self-resetting multi-section prefabricated pier, which comprises a bearing platform and a prefabricated pier, wherein the prefabricated pier comprises an inserted bearing platform section, a plurality of pier body sections, prestressed tendons and energy dissipation tendons; a pier mounting hole is formed in the vertical direction of the bearing platform, the prefabricated pier is arranged in the pier mounting hole in a socket joint mode through the inserted bearing platform segment, and the pier body segments are installed on the inserted bearing platform segment in a stacking mode; the top surfaces of the inserted bearing platform sections and the pier body sections are provided with shear key grooves I, the bottoms of the pier body sections are provided with shear keys I, and the sizes of the shear keys I are matched with the shear key grooves I; the prefabricated pier runs through and is provided with the pier grout sleeve that is used for burying underground the energy consumption muscle, the shear force key recess I and the I position department of shear force key of prefabricated pier run through and are provided with the prestressing tendons pore that is used for burying underground the prestressing tendons, the bottom that inserts the cushion cap segment is provided with the ground tackle that is used for the anchor joint prestressing tendons.
Description
Technical Field
The utility model relates to a bridge construction technical field, specific theory has related to a socket joint formula is from restoring to throne prefabricated pier of multisection section.
Background
Compared with the integral cast-in-place pier widely applied at present, the prefabricated pier has great advantages in the aspects of saving resources, protecting the environment, shortening the construction period and the like. In the existing prefabricated bridge pier technology, the multi-section prefabricated bridge pier receives more and more attention by virtue of excellent post-earthquake self-resetting performance. The prefabricated bridge pier structure is characterized in that the whole bridge pier is divided into a plurality of sections, each section is firstly processed in a prefabrication factory, then is transported to a site for assembly, and finally is subjected to post-tensioning prestress to form a whole.
For a common multi-segment prefabricated pier, an anchorage device and a prestressed tendon need to be pre-buried in a foundation bearing platform in advance, segment assembly can only be carried out in the air, and accurate alignment of a prestressed tendon pipeline, an energy consumption reinforced steel pipeline, a shear key and the like needs to be ensured.
In addition, because the segments are connected by adopting dry joints, the prestressed tendons and the energy-consuming reinforcing steel bars can be directly contacted with the external environment, and the durability of the multi-segment pier is reduced more seriously than that of a cast-in-place pier under the long-term action. Particularly in the marine environment and areas with serious chloride pollution (deicing salt effect, saline-alkali soil and the like), the prestressed tendons and the energy-consuming steel bars are used as important parts for ensuring the bearing capacity and the self-resetting capacity, and are subjected to severe corrosion failure risk due to chloride ion corrosion.
In order to solve the above problems, people are always seeking an ideal technical solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of prior art to a socket joint formula is from restoring to throne prefabricated pier of multiunit section is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is:
a socket joint type self-resetting multi-segment prefabricated bridge pier comprises a bearing platform and a prefabricated bridge pier, wherein the prefabricated bridge pier comprises an inserted bearing platform segment, a plurality of pier body segments, prestressed tendons and energy dissipation tendons;
a pier mounting hole is formed in the vertical direction of the bearing platform, the prefabricated pier is arranged in the pier mounting hole in a socket joint mode through the inserted bearing platform segment, and the pier body segments are installed on the inserted bearing platform segment in a stacking mode;
the top surfaces of the inserted bearing platform sections and the pier body sections are provided with shear key grooves I, the bottoms of the pier body sections are provided with shear keys I, and the sizes of the shear keys I are matched with the shear key grooves I;
the prefabricated pier runs through and is provided with the pier grout sleeve that is used for burying underground the energy consumption muscle, the shear force key recess I and the I position department of shear force key of prefabricated pier run through and are provided with the prestressing tendons pore that is used for burying underground the prestressing tendons, the bottom that inserts the cushion cap segment is provided with the ground tackle that is used for the anchor joint prestressing tendons.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model has the advantages of it is following:
(1) under the condition that the self-resetting capability of the socket joint type multi-section prefabricated pier is reserved, the tensioning process is completed in a factory without pre-burying an anchorage device and a prestressed tendon in a bearing platform in advance, so that the field operation amount is greatly reduced, the requirement on the field construction precision is low, the adjustment redundancy is high, and the requirement on construction equipment is not high;
(2) horizontal tensioning is adopted for the tensioning prestress of the prefabrication plant, so that the field high-altitude operation is avoided, and the safety and the high efficiency are realized;
(3) the durability of the pier is greatly enhanced by using the stainless steel material and the UHPC material.
Drawings
Fig. 1 is a sectional view showing the structure of the embodiment of the present invention.
Fig. 2 is a schematic structural view of the pier body segment of the present invention.
In the figure: 1. a bearing platform; 2. inserting the cap segment; 3. a pier shaft segment; 4. prestressed tendons; 5. energy consumption ribs; 6. pier mounting holes; 7. a shear key groove I; 8. a shear key I; 9. a pier grouting sleeve; 10. a slurry discharge hole; 11. grouting holes; 12. a prestressed tendon duct; 13. an anchorage device; 14. a shear key II; 15. and a shear key groove II.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in fig. 1, the socket-and-spigot self-resetting multi-segment prefabricated bridge pier comprises a bearing platform 1 and a prefabricated bridge pier, wherein the prefabricated bridge pier comprises an inserted bearing platform segment 2, a plurality of pier body segments 3, prestressed ribs 4 and energy dissipation ribs 5;
a pier mounting hole 6 is formed in the bearing platform 1 in the vertical direction, the prefabricated pier is arranged in the pier mounting hole 6 in a socket joint mode through the inserted bearing platform segment 2, and the pier body segments 3 are mounted on the inserted bearing platform segment 2 in a stacked mode;
a shear key groove I7 is formed in the top surface of the inserted bearing platform section 2 and the top surface of the pier body section 3, a shear key I8 is arranged at the bottom of the pier body section 3, and the size of the shear key I8 is matched with that of the shear key groove I7;
the prefabricated bridge pier is provided with a bridge pier grouting sleeve 9 used for embedding the energy dissipation ribs 5 in a penetrating mode, the upper hole wall of the bridge pier grouting sleeve 9 is provided with a grout discharging hole 10, and the lower hole wall of the bridge pier grouting sleeve 9 is provided with a grouting hole 11; the pier grouting sleeves 9 are uniformly distributed on the prefabricated pier, and the energy dissipation ribs 5 extend out of the pier body sections 3 and are inserted into the insertion bearing platform sections 2; the positions of a shear key groove I7 and a shear key I8 of the prefabricated bridge pier are provided with a prestressed tendon pore passage 12 for embedding a prestressed tendon 4 in a penetrating mode, and the bottom of the insertion bearing platform section 2 is provided with an anchorage device 13 for anchoring the prestressed tendon.
In this embodiment, the energy-consuming steel bars 5 and the prestressed bars 4 are made of stainless steel. Stainless steel is a high chromium alloy steel whose surface is capable of forming a passive film of chromium and iron oxides and hydroxides to protect the inner substrate from corrosion. After the joints of the multi-section pier are opened, the energy-consuming steel bars and the prestressed tendons are directly exposed in the surrounding environment, and the stainless steel is used for replacing the traditional steel so as to well avoid the corrosion failure danger. The energy consumption muscle is at the section joint height, with two lamella rubber blocks of bolt fastening, and the rubber block inner wall is laminated with reinforcing bar crescent line is complete, and energy consumption muscle external diameter is less than sleeve internal diameter 0.5 cm. The setting of block rubber can make the power consumption reinforcing bar be located sleeve central point all the time and put, guarantees the anchor effect, also can let the reinforcing bar freely warp in segment joint position, full play power consumption effect.
A plurality of annular shear keys II 14 and shear key grooves II 15 are arranged on the outer wall of the inserted bearing platform segment S0 and the inner wall of the pier mounting hole, and meanwhile, the length of the inserted bearing platform segment 2 can ensure the embedded connection performance of the pier and the bearing platform; the shear key II 14 and the shear key groove II 15 inserted into the bearing platform section and the shear key II 14 and the shear key groove II 15 of the pier mounting hole 6 are arranged opposite to each other, so that sharp corners are eliminated, the anchoring strength is higher, and stress concentration is avoided; the arrangement of the shear key II 14 and the shear key groove II 15 improves the anchoring of the pier and the bearing platform.
The assembling method of the socket-and-spigot self-resetting multi-segment prefabricated bridge pier comprises the following steps:
step 1, prefabricating the prefabricated bridge pier;
step 1.1, binding a reinforcement cage and a bearing platform reinforcement cage in each section of the prefabricated pier;
step 1.2, manufacturing a template of each segment of the prefabricated pier, and reserving a prestressed duct of the pier grouting sleeve and the prestressed tendon duct at a corresponding position by using a PVC pipe, wherein the diameter of the prestressed duct is at least 1.5 times of the nominal diameter of the prestressed tendon;
and step 1.3, concrete is poured in the formwork, wherein the plastic hinge area segment S1 is poured by UHPC, the characteristics of high strength, compactness and good durability of the UHPC are fully utilized, and other segments are poured by common concrete, so that the overall cost of the pier is reduced.
And 1.4, curing by adopting a high-temperature steam curing mode.
And 2, in a prefabrication plant, tensioning the prestressed tendons to connect all the sections into a whole by adopting a horizontal assembly method. The horizontal assembling method in the step 2 comprises the following steps: fixing the inserted bearing platform segment 2, sequentially splicing other segments along the energy consumption rib 4, penetrating the prestressed rib 5 into the prestressed rib hole 12, applying prestress on one end of the pier by adopting a horizontal tensioning method to form the segments into a whole, and filling the anchorage area with concrete after tensioning is finished.
And 3, injecting high-strength non-shrinkage cement slurry into the pier grouting sleeve 9 through the grouting holes 11, and plugging the grouting holes 11 and the grout discharging holes 10 after the cylindrical slurry flows out of the grout discharging holes 10 for 2 seconds. Wherein, set up the unbonded section of power consumption reinforcing bar through the block rubber in section seam position, can let the power consumption reinforcing bar freely warp, fully improve the power consumption ability and the anti environmental erosion ability of multisection section pier.
And 4, hoisting the pier to be inserted into the pier mounting hole 6 on site, so that a certain gap is kept between the outer wall of the inserted bearing platform segment 2 and the inner wall of the pier mounting hole 6.
And 5, after the prefabricated pier is positioned, inserting a conduit into the bottom of the gap, injecting high-strength non-shrinkage cement slurry into the bottom through the conduit, and discharging the slurry from bottom to top until the gap between the inserted bearing platform segment 2 and the pier mounting hole 6 is completely filled.
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 a socket joint formula is from restoring to throne prefabricated pier of multiunit section which characterized in that: the prefabricated bridge pier comprises a bearing platform section, a plurality of pier body sections, prestressed tendons and energy dissipation tendons, wherein the bearing platform section is inserted into the prefabricated bridge pier;
a pier mounting hole is formed in the vertical direction of the bearing platform, the prefabricated pier is arranged in the pier mounting hole in a socket joint mode through the inserted bearing platform segment, and the pier body segments are installed on the inserted bearing platform segment in a stacking mode;
the top surfaces of the inserted bearing platform sections and the pier body sections are provided with shear key grooves I, the bottoms of the pier body sections are provided with shear keys I, and the sizes of the shear keys I are matched with the shear key grooves I;
the prefabricated pier runs through and is provided with the pier grout sleeve that is used for burying underground the energy consumption muscle, the shear force key recess I and the I position department of shear force key of prefabricated pier run through and are provided with the prestressing tendons pore that is used for burying underground the prestressing tendons, the bottom that inserts the cushion cap segment is provided with the ground tackle that is used for the anchor joint prestressing tendons.
2. The socket-and-spigot self-resetting multi-segment precast pier of claim 1, wherein: and the wall of the upper hole of the pier grouting sleeve is provided with a grout discharging hole, and the wall of the lower hole of the pier grouting sleeve is provided with a grouting hole.
3. The socket-and-spigot self-resetting multi-segment precast pier of claim 1, wherein: high-strength non-shrinkage cement slurry is filled in the pier grouting sleeve.
4. The socket-and-spigot self-resetting multi-segment precast pier of claim 3, wherein: the prestressed tendons and the energy dissipation tendons are stainless steel bars.
5. The socket-and-spigot self-resetting multi-segment precast pier of claim 1, wherein: the energy dissipation muscle is at the segment joint height, and the bolt fastening has two lamella rubber blocks, and the rubber block inner wall is laminated with energy dissipation muscle crescent moon line completely.
6. The socket-and-spigot self-resetting multi-segment precast pier of claim 1, wherein: the outer wall of the inserted bearing platform section and the outer wall of the pier mounting hole are provided with a shear key II and a shear key groove II.
7. The socket-and-spigot self-resetting multi-segment precast pier of claim 1, wherein: the pier grouting sleeves are uniformly distributed on the prefabricated pier, and the energy dissipation ribs extend out of the pier body sections and are inserted into the bearing platform sections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921479493.6U CN211256634U (en) | 2019-09-06 | 2019-09-06 | Socket-and-spigot self-resetting multi-section prefabricated bridge pier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921479493.6U CN211256634U (en) | 2019-09-06 | 2019-09-06 | Socket-and-spigot self-resetting multi-section prefabricated bridge pier |
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| CN211256634U true CN211256634U (en) | 2020-08-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
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2019
- 2019-09-06 CN CN201921479493.6U patent/CN211256634U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
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