A prefabricated hollow pier

Abstract

The application discloses a prefabricated hollow pier, a plurality of prefabricated pier bodies are arranged in the vertical direction, the lowermost prefabricated pier body is fixedly connected with a prefabricated bearing platform and adjacent prefabricated pier bodies, a plurality of stiffeners are fixedly connected in the chamber of the outer skin in the vertical direction and are arranged in the chamber of the outer skin in equal intervals, a core column is arranged on the inner side of the outer skin and is fixedly connected with the outer skin, and a concrete layer is poured in the chamber of the outer skin. In the embodiment of the application, the lowermost prefabricated pier body is hoisted to the top surface of the prefabricated bearing platform, and the subsequent prefabricated pier bodies are hoisted in sequence, the adjacent prefabricated pier bodies are fixedly connected, a complete bridge pier body is formed, a large amount of formwork installation, removal and concrete maintenance work is not needed, and the construction and installation of the bridge pier body are facilitated. The core column is arranged on the inner side of the outer skin and is fixedly connected with the inner wall of the outer skin, the bearing capacity of the bridge pier is improved, the concrete is closely combined with the outer skin, the stiffeners and the core column in the solidification process, and the stability of the overall structure of the prefabricated pier body is ensured.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a precast hollow pier. Background Technology

[0002] Currently, there are two main construction methods for bridge piers: cast-in-place and precast assembly. However, both of these methods have many inconveniences.

[0003] The construction of cast-in-place bridge piers requires the installation and removal of a large number of formworks, and taller piers need to be poured in sections, resulting in a slow construction progress and difficulty in controlling the construction quality. Precast bridge piers are generally precast in their entirety and then hoisted and assembled, requiring large hoisting equipment and a large number of temporary supports. The construction accuracy requirements are high, and the overall construction cost is high.

[0004] Therefore, a new type of precast pier is needed to solve the above problems. Utility Model Content

[0005] This application provides a prefabricated hollow pier, which aims to facilitate pier construction while ensuring the structural integrity of the pier.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A precast hollow pier includes a precast foundation and a pier body disposed on the top surface of the precast foundation. The pier body includes multiple precast foundations.

[0008] Multiple precast platforms are arranged vertically, with the lowest precast platform fixedly connected to the precast support and adjacent precast platforms.

[0009] The precast platform consists of an outer skin, multiple stiffeners, a core column, and a concrete layer;

[0010] The dimensions of the outer skin are consistent with the preset dimensions of the pier body;

[0011] Multiple stiffeners are vertically fixed to the cavity of the outer skin and are arranged in a ring at equal intervals within the cavity of the outer skin;

[0012] The core post is located on the inner side of the outer skin, and the circumferential surface of the core post is fixedly connected to the inner wall of the outer skin.

[0013] The concrete layer is poured into the cavity of the outer skin.

[0014] Furthermore, the outer skin has an overall groove-shaped structure with the groove facing upwards. A connecting groove is fixedly provided on the periphery of the groove of the outer skin, and a connecting sleeve for connecting adjacent outer skins or precast foundations is fixedly provided on the periphery of the bottom of the groove of the outer skin. The connecting sleeve is installed in the connecting groove, and half of the cavity of the connecting sleeve is filled with high-performance mortar.

[0015] Furthermore, the core column includes multiple vertical columns, multiple longitudinal reinforcing bars, and multiple transverse reinforcing bars;

[0016] Multiple columns are arranged in a ring along the outline of the outer skin and located inside the outer skin. The circumference of the multiple columns is fixedly connected to the inner side of the inner groove wall of the outer skin.

[0017] Multiple horizontal reinforcing bars are evenly spaced along the height of the column, and the two ends of the multiple horizontal reinforcing bars are fixedly connected to the corresponding perimeter of the column.

[0018] Multiple longitudinal reinforcing bars are spaced apart along the length of their corresponding transverse reinforcing bars and are fixedly connected to their circumference.

[0019] Multiple columns, along with multiple horizontal and multiple vertical reinforcing bars, form a columnar cage structure.

[0020] Furthermore, a conical connecting column is fixedly installed at the top of each of the multiple columns, and a connecting sleeve is fixedly installed at the bottom of each of the multiple columns. The connecting column is embedded in the connecting sleeve and is interference-fitted with the inner wall of the connecting sleeve.

[0021] Furthermore, multiple reinforcing ribs are fixedly installed inside the precast foundation. One end of each reinforcing rib extends into the interior of the precast foundation, while the other end extends into the interior of the precast foundation body.

[0022] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0023] This embodiment of the invention first hoists the lowest precast platform to the top of the precast pier, then hoists the subsequent precast platforms in sequence, with adjacent platforms fixedly connected to form a complete pier body. This eliminates the need for extensive formwork installation, removal, and concrete curing, facilitating the construction and installation of the pier body. The core column is located inside the outer skin and fixedly connected to the inner wall, enhancing the pier's load-bearing capacity. A concrete layer is poured into the cavity of the outer skin, and during solidification, the concrete tightly bonds with the outer skin, stiffeners, and core column, forming a unified structure and ensuring the overall stability of the precast platform. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the precast hollow pier provided in the embodiments of this application.

[0026] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0027] Figure 3 This is a schematic diagram of the structure of the prefabricated platform provided in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the outer skin structure provided in the embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the core column provided in an embodiment of this application.

[0030] Icons: 1-Precast pier cap; 10-Reinforcing rib; 2-Pier body; 20-Precast pier body; 21-Outer skin; 201-Connecting groove; 202-Connecting sleeve; 22-Stretcher; 23-Core column; 231-Column; 232-Longitudinal reinforcement; 233-Horizontal reinforcement; 2311-Connecting column; 2312-Connecting sleeve; 24-Concrete layer; 25-Buffer layer. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0032] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0033] like Figures 1-5As shown, a precast hollow pier includes a precast foundation 1 and a pier body 2 disposed on the top surface of the precast foundation 1. The pier body 2 includes multiple precast platforms 20. The multiple precast platforms 20 are arranged vertically, and the lowermost precast platform 20 is fixedly connected to the precast foundation 1 and adjacent precast platforms 20. The precast platform 20 includes an outer skin 21, multiple stiffeners 22, a core column 23, and a concrete layer 24. The size of the outer skin 21 is consistent with the preset size of the pier body 2. The multiple stiffeners 22 are vertically fixed to the cavity of the outer skin 21 and are arranged in a ring at equal intervals in the cavity of the outer skin 21. The core column 23 is disposed on the inner side of the outer skin 21, and the circumference of the core column 23 is fixedly connected to the inner wall of the outer skin 21. The concrete layer 24 is poured into the cavity of the outer skin 21.

[0034] In the above scheme, at the construction site, the precast pier cap 1 is first placed in the designated position and the foundation treatment is completed. Then, the lowermost precast pier body 20 is hoisted onto the top surface of the precast pier cap 1, and the two are fixedly connected by connectors. Subsequent precast pier bodies 20 are hoisted in sequence, and adjacent precast pier bodies 20 are fixedly connected to each other, finally forming a complete pier body 2. This eliminates the need for extensive formwork installation, dismantling, and concrete curing work, facilitating the construction and installation of the pier body 2. Inside the precast pier body 20, the outer skin 21 serves as the external protective structure of the precast pier body 20. Its dimensions are consistent with the preset dimensions of the pier body 2, ensuring that the pier's appearance meets the design requirements. Multiple stiffeners 22 are vertically and equally spaced and fixedly connected in a ring within the cavity of the outer skin 21, forming a rib-like support structure that enhances the bending and torsional resistance of the outer skin 21 and improves the overall stability of the pier. The core column 23 is located inside the outer skin 21 and is fixedly connected to the inner wall of the outer skin 21, which improves the bearing capacity of the pier. A concrete layer 24 is poured into the cavity of the outer skin 21. During the solidification process, the concrete is tightly combined with the outer skin 21, the stiffener 22 and the core column 23 to form an integral structure, thereby ensuring the overall structural stability of the precast platform 20.

[0035] The outer skin 21 has an overall groove-shaped structure with the groove facing upwards. A connecting groove 201 is fixedly provided on the periphery of the groove of the outer skin 21. A connecting sleeve 202 for connecting adjacent outer skins 21 or precast foundation 1 is fixedly provided on the periphery of the bottom of the groove of the outer skin 21. The connecting sleeve 202 is installed in the connecting groove 201, and half of the cavity of the connecting sleeve 202 is filled with high-performance mortar.

[0036] In the above scheme, during the assembly of the precast hollow pier, the outer skin 21 has an overall U-shaped structure with the groove facing upwards. The connecting groove 201 on the periphery of the groove and the connecting sleeve 202 on the periphery of the groove bottom cooperate with each other. When the next precast platform 20 (or precast bearing 1) is assembled with the current precast platform 20, the connecting sleeve 202 on the outer skin 21 of the lower precast platform 20 (or precast bearing 1) is aligned with the connecting groove 201 of the groove on the outer skin 21 of the upper precast platform 20, so that the connecting sleeve 202 is installed in the connecting groove 201. This achieves the initial positioning and connection of the upper and lower precast platforms 20 or precast bearing 1, and provides a vertical force transmission path. After the connecting sleeve 202 is installed in the connecting groove 201, high-performance mortar is filled into the cavity of the connecting sleeve 202, with the filling height being half of the cavity. High-performance mortar has good fluidity and adhesion. During the filling process, it can fully fill the gap between the connecting sleeve 202 and the connecting groove 201. After curing, it forms a high-strength adhesive layer, which tightly connects the upper and lower precast abutments 20 or precast piers 1 together, making them a whole to jointly bear the load. This allows the horizontal load to be evenly distributed inside the pier, avoiding the phenomenon of cracking on the periphery of the precast abutment 20 due to local stress concentration.

[0037] The core column 23 includes multiple upright columns 231, multiple longitudinal reinforcing bars 232, and multiple transverse reinforcing bars 233. The multiple upright columns 231 are arranged in a ring along the outline of the outer skin 21 and located inside the outer skin 21. The circumferential surfaces of the multiple upright columns 231 are fixedly connected to the inner surface of the inner groove wall of the outer skin 21. The multiple transverse reinforcing bars 233 are arranged at equal intervals along the height direction of the upright columns 231, and the two ends of the multiple transverse reinforcing bars 233 are fixedly connected to the circumferential surfaces of the corresponding upright columns 231. The multiple longitudinal reinforcing bars 232 are arranged at intervals along the length direction of the corresponding transverse reinforcing bars 233 and are fixedly connected to their circumferential surfaces. The multiple upright columns 231, multiple transverse reinforcing bars 233, and multiple longitudinal reinforcing bars 232 form a columnar cage structure.

[0038] In the above scheme, multiple columns 231 are arranged in a ring along the outline of the outer skin 21 and located inside the outer skin 21. Their circumferences are fixedly connected to the inner side of the inner groove wall of the outer skin 21, bearing the vertical load from the upper part of the pier and evenly transferring the load to the outer skin 21, which then further transfers it to the foundation. The ring arrangement of the columns 231 allows for uniform load distribution, avoids local stress concentration, and improves the bearing capacity of the pier. The transverse reinforcing bars 233 and the longitudinal reinforcing bars 232, together with the columns 231, form a columnar cage structure, enhancing the overall stiffness and stability of the core column 23. When bearing load, the transverse reinforcing bars 233 and the longitudinal reinforcing bars 232 can limit the lateral deformation of the columns 231, improve the bending and shear resistance of the core column 23, and ensure the stability of the pier under horizontal loads.

[0039] A conical connecting column 2311 is fixedly installed at the top of each of the multiple columns 231, and a connecting sleeve 2312 is fixedly installed at the bottom of each of the multiple columns 231. The connecting column 2311 is embedded in the connecting sleeve 2312 and is interference-fitted with the inner wall of the connecting sleeve 2312.

[0040] In the above scheme, the connecting sleeve 2312 at the bottom of the upper precast platform 20 column 231 is connected to the connecting column 2311 at the top of the lower precast platform 20 column 231. The conical connecting column 2311 has a guiding function, which can be easily inserted into the connecting sleeve 2312 to achieve the initial positioning between the upper and lower precast platform 20 columns 231, making the connection between the columns 231 more accurate and efficient, and reducing the adjustment time during construction. Through the squeezing action between the connecting column 2311 and the connecting sleeve 2312, it can withstand greater axial force and shear force, ensuring that the connection between the upper and lower precast platform 20 columns 231 is firm and reliable.

[0041] Multiple reinforcing ribs 10 are fixedly installed inside the precast foundation 1. One end of each reinforcing rib 10 extends into the interior of the precast foundation 1, and the other end extends into the interior of the precast platform body 20.

[0042] The stiffener 10 connects the precast platform 20, the precast pier, and the precast foundation 1 into a whole, enabling them to work together under load. Under horizontal loads (such as wind loads and seismic loads), the stiffener 10 can limit the relative displacement between the precast platform 20, the precast pier, and the precast foundation 1, thereby improving the integrity and stability of the entire precast hollow pier structure.

[0043] The space between the periphery of the core column 23 and the inner surface of the outer skin 21 is filled with high-performance mortar, forming a buffer layer 25.

[0044] In the above scheme, the buffer layer 25 composed of high-performance mortar has a certain degree of flexibility and deformation capacity. When the core column 23 is compressed, the buffer layer 25 can undergo slight deformation, dispersing and transferring the load on the core column 23. This dispersion effect allows the load to be applied more evenly to the outer skin 21, preventing the outer skin 21 from cracking or being damaged due to excessive local stress, and also improving the overall appearance quality of the bridge pier.

[0045] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0046] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A prefabricated hollow pier, comprising a prefabricated bearing platform (1) and a pier body (2) arranged on the top surface of the prefabricated bearing platform (1), characterized in that, The pier body (2) includes multiple prefabricated platforms (20); Multiple prefabricated platforms (20) are arranged vertically, and the prefabricated platform (20) at the bottom is fixedly connected to the prefabricated support platform (1) and the adjacent prefabricated platforms (20); The precast platform (20) includes an outer skin (21), multiple stiffeners (22), a core column (23), and a concrete layer (24); The dimensions of the outer skin (21) are consistent with the preset dimensions of the pier body (2); Multiple stiffeners (22) are vertically fixed to the cavity of the outer skin (21) and are arranged in a ring at equal intervals in the cavity of the outer skin (21); The core post (23) is disposed on the inner side of the outer skin (21), and the circumferential surface of the core post (23) is fixedly connected to the inner wall of the outer skin (21); The concrete layer (24) is poured into the cavity of the outer skin (21).

2. The precast hollow pier according to claim 1, characterized in that, The outer skin (21) is generally in the shape of a U-shape with the groove facing upward. A connecting groove (201) is fixedly provided on the periphery of the groove of the outer skin (21). A connecting sleeve (202) for connecting adjacent outer skins (21) or prefabricated support (1) is fixedly provided on the periphery of the bottom of the groove of the outer skin (21). The connecting sleeve (202) is installed in the connecting groove (201), and half of the cavity of the connecting sleeve (202) is filled with high-performance mortar.

3. The precast hollow pier according to claim 1, characterized in that, The core column (23) includes multiple vertical columns (231), multiple longitudinal steel bars (232), and multiple transverse steel bars (233); Multiple columns (231) are arranged in a ring along the outline of the outer skin (21) and located inside the outer skin (21). The circumferential surface of the multiple columns (231) is fixedly connected to the inner surface of the inner groove wall of the outer skin (21). Multiple horizontal reinforcing bars (233) are arranged at equal intervals along the height direction of the column (231), and the two ends of the multiple horizontal reinforcing bars (233) are fixedly connected to the circumference of the corresponding column (231). The longitudinal reinforcing bars (232) are spaced apart along the length of the corresponding transverse reinforcing bars (233) and are fixedly connected to their circumference. The multiple columns (231), multiple horizontal reinforcing bars (233), and multiple vertical reinforcing bars (232) constitute a columnar cage structure.

4. The precast hollow pier according to claim 3, characterized in that, A conical connecting column (2311) is fixedly provided at the top of each of the multiple columns (231), and a connecting sleeve (2312) is fixedly provided at the bottom of each of the multiple columns (231). The connecting column (2311) is embedded in the connecting sleeve (2312) and is interference-fitted with the inner wall of the connecting sleeve (2312).

5. The precast hollow pier according to claim 1, characterized in that, The precast support (1) is fixedly provided with multiple reinforcing ribs (10), one end of each reinforcing rib (10) extends into the interior of the precast support (1), and the other end extends into the interior of the precast platform body (20).

6. The precast hollow pier according to claim 4, characterized in that, The circumferential surface of the core column (23) and the inner surface of the outer skin (21) are filled with high-performance mortar to form a buffer layer (25).

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