Fabricated concrete-filled steel tube pier structure

Abstract

The invention provides a fabricated concrete-filled steel tube pier structure, and relates to the technical field of bridge engineering, the fabricated concrete-filled steel tube pier structure comprises a foundation pile, a bearing platform, a cover beam and a column limb, the bearing platform is fixedly arranged at the top end of the foundation pile, and a plurality of first preformed holes are formed in the top of the bearing platform; a plurality of second preformed holes are formed in the bottom of the cover beam; the column limbs are steel pipe concrete column limbs and are arranged between the bearing platform and the cover beam, the bottom ends of the column limbs are arranged in the first preformed holes, and the top ends of the column limbs are arranged in the second preformed holes. Lattice column limbs and standardized lacing parts are prefabricated in a factory, the cast-in-place and maintenance period is remarkably shortened, construction dust and noise pollution are reduced, the formwork turnover difficulty is reduced, the light weight and high strength characteristics of the steel pipe concrete are combined, the high pier pile foundation work amount can be reduced, the hollow lattice structure and the natural environment form visual permeation, and the construction efficiency is improved. The problems that a cast-in-place bridge pier is heavy and landscape is split are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to an assembled steel tube concrete pier structure. Background Art

[0002] In existing technologies, reinforced concrete piers, widely used in bridge engineering, mostly adopt cast-in-place construction technology. However, its limitations are becoming increasingly prominent in high piers and complex terrain environments. During traditional construction, high piers often require longitudinal or transverse slopes to meet structural stability requirements. This not only leads to complex formwork support systems and extended construction periods, but also requires a large amount of on-site pouring operations, resulting in significant noise, dust pollution, and the accumulation of construction waste, which puts great pressure on the environmental carrying capacity and landscape coordination of ecologically sensitive tourist scenic spots. In addition, cast-in-place construction relies on climbing formwork or flipping formwork, which requires frequent formwork installation and disassembly and concrete curing. When transportation conditions are limited in mountainous areas, the difficulty in dispatching large formwork and construction machinery further exacerbates the problem of low construction efficiency. At the same time, the safety risks of high-altitude operations are significantly increased. Therefore, there is an urgent need for a new bridge pier structure solution that is efficient, environmentally friendly, and integrated with the natural landscape. Summary of the Invention

[0003] The purpose of the present invention is to provide a prefabricated steel tube concrete bridge pier structure to improve the above-mentioned problem. To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows:

[0004] The present application provides an assembled steel tube concrete pier structure, comprising: foundation piles, a pedestal, a cap beam and column limbs, wherein the pedestal is fixedly arranged at the top of the foundation pile, and a plurality of first reserved holes are provided at the top of the pedestal; a plurality of second reserved holes are provided at the bottom of the cap beam; the column limbs are arranged as steel tube concrete column limbs, the column limbs are arranged between the pedestal and the cap beam, the bottom ends of the column limbs are arranged in the first reserved holes, and the top ends of the column limbs are arranged in the second reserved holes.

[0005] Preferably, the number of the first reserved holes, the second reserved holes and the column limbs is the same, and the diameters of the first reserved holes and the second reserved holes are both larger than the diameter of the column limbs.

[0006] Preferably, the inner wall of the first reserved hole is provided with a shear-resistant structure and a positioning guide device.

[0007] Optionally, slightly expansive self-compacting concrete is poured between the first reserved hole and the column limb.

[0008] Preferably, a concrete platform is provided on the top surface of the foundation, and the concrete platform wraps the bottom of the column limb.

[0009] Optionally, the concrete platform can completely cover the first reserved hole.

[0010] Optionally, the cap beam is configured as a shell with a cavity formed on the upper top surface, and concrete is poured into the cavity.

[0011] Preferably, a fitting is provided between the column limbs, and the fitting is fixedly connected to the column limbs.

[0012] Preferably, the tie members are arranged as a cross tie bar system, in which a transverse tie bar is arranged between two adjacent pairs of cross tie bars, and the cross tie bar system and the column limbs together constitute a truss-like spatially stable structure.

[0013] Preferably, the lattice column adopts a prefabrication process, and the lattice column is arranged into multiple truss segments along the height direction. The truss segments are composed of the column limbs and the cross tie bar system. The top ends of two adjacent column limbs are fixedly connected with a cross tie bar, and two adjacent column limbs are fixedly connected with two cross-arranged diagonal tie bars, and the two ends of the diagonal tie bars are respectively fixed to the top and bottom ends of the two adjacent column limbs.

[0014] The beneficial effects of the present invention are:

[0015] The present invention uses steel tube concrete as the compressive column limbs, and forms a multi-limb lattice force-bearing system through hollow steel tubes and steel parts. The number of column limbs can be flexibly set to a four-limb, six-limb, or eight-limb layout according to load requirements. The column limbs are connected to the pedestal and cap beam using pre-reserved hole insertion. By pouring micro-expansive concrete in the pre-reserved holes, overall consolidation is achieved, forming an assembled pier structure with both high bearing capacity and modular characteristics. The present invention significantly shortens the on-site casting and curing cycle and reduces construction dust and noise pollution by prefabricating lattice column limbs and standardized parts in the factory. The modular assembly process can accurately control the quality of components and reduce the difficulty of template turnover. Combined with the lightweight and high-strength characteristics of steel tube concrete, it can reduce the amount of high pier pile foundation engineering. The hollow space structure forms a visual penetration with the natural environment, solving the problem of landscape fragmentation.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the embodiments of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a vertical layout diagram of four-limb lattice columns of an assembled steel tube concrete pier structure described in an embodiment of the present invention;

[0019] Figure 2 This is a side view of the four-limb lattice column arrangement of an assembled steel tube concrete pier structure described in an embodiment of the present invention;

[0020] Figure 3 This is a vertical layout diagram of a cap beam of a prefabricated steel tube concrete pier structure according to an embodiment of the present invention;

[0021] Figure 4 This is a side view of the cap beam arrangement of an assembled steel tube concrete pier structure according to an embodiment of the present invention;

[0022] Figure 5 AA cross-sectional schematic diagram of an assembled steel tube concrete pier structure according to an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of a four-limb lattice column truss segment of an assembled steel tube concrete pier structure according to an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of a six-legged lattice column module truss segment of an assembled steel tube concrete pier structure according to an embodiment of the present invention;

[0025] Figure 8 This is a vertical layout diagram of six-legged lattice columns of a prefabricated concrete-filled steel tube pier structure according to an embodiment of the present invention;

[0026] Figure 9 BB cross-sectional schematic diagram of an assembled steel tube concrete pier structure described in an embodiment of the present invention.

[0027] Markings in the figure: 1. Foundation pile; 2. Capping platform; 21. Micro-expanding self-compacting concrete; 22. Concrete platform; 3. Cap beam; 31. Concrete; 4. Column limb; 41. Fittings. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0030] Example 1:

[0031] like Figures 1 to 9 As shown, this embodiment provides an assembled steel tube concrete pier structure, including: a foundation pile 1, a pedestal 2, a cap beam 3 and a column limb 4, the pedestal 2 is fixedly arranged at the top of the foundation pile 1, and a plurality of first reserved holes are opened on the top of the pedestal 2; a plurality of second reserved holes are opened at the bottom of the cap beam 3; the column limb 4 is set as a steel tube concrete column limb, the column limb 4 is set between the pedestal 2 and the cap beam 3, the bottom end of the column limb 4 is set in the first reserved hole, and the top end of the column limb 4 is set in the second reserved hole.

[0032] like Figures 1 to 5 As shown, the foundation piles 1 in the present invention adopt conventional bored cast-in-place piles or prefabricated pipe piles, which are rigidly connected to the upper pedestal 2. The number of the first reserved holes is the same as that of the column limbs 4, and the diameter of the first reserved holes is larger than the diameter of the column limbs 4. After the bottom of the column limb 4 is inserted into the first reserved holes, micro-expanding self-compacting concrete 21 is poured between the first reserved holes and the column limbs 4 to form a consolidation node, and then self-compacting concrete is pumped into the column limbs 4. The cap beam 3 is set as a shell with a cavity on the upper top surface, the number of the second reserved holes is the same as that of the column limbs 4, and the diameter of the second reserved holes is larger than the diameter of the column limbs 4. The cap beam 3 is precisely installed at the top of the column limb 4 through the second reserved holes, and then concrete 31 is poured into the cavity of the cap beam 3, so that the shell, the concrete 31 and the top of the column limb 4 inserted into the second reserved holes together form a solid cap beam structure.

[0033] Example 2:

[0034] This embodiment is further optimized based on embodiment 1. Figure 1 and Figure 5 As shown, a concrete platform 22 is provided on the top surface of the foundation 2 , and the concrete platform 22 wraps the bottom of the column limb 4 , and the concrete platform 22 can completely cover the first reserved hole.

[0035] The concrete platform 22 creates a physical barrier, elevating the contact interface between the bottom of the column 4 and the ground, thereby blocking direct erosion of the column 4 by groundwater and corrosive media. The size of the concrete platform 22 is larger than the diameter of the first reserved hole, that is, the concrete platform 22 has a portion directly connected to the base 2, thereby ensuring its stability.

[0036] Example 3:

[0037] This embodiment is further optimized based on embodiment 1. Figure 1 and Figure 2 As shown, a tie piece 41 is provided between the column limbs 4, and the tie piece 41 is fixedly connected to the column limbs 4. The tie piece 41 is provided as a cross tie bar system. In the cross tie bar system, a cross tie bar is provided between two adjacent pairs of cross tie bars. The cross tie bar system and the column limbs 4 together constitute a truss-like spatial stable structure.

[0038] The attachments 41 are made of standardized steel or steel pipes, and are connected to the column limbs by node plate bolting or welding nodes, so as to realize the adjustable design of the pier body stiffness and ductility.

[0039] Example 4:

[0040] This embodiment is further optimized based on embodiment 3. Figure 6 As shown, the four-limb lattice column adopts an integral prefabrication process, and the four-limb lattice column is arranged into multiple truss segments along the height direction, and the truss segments include four column limbs 4, and the column limbs 4 are arranged in a rectangular space layout. The top ends of two adjacent column limbs 4 are fixedly connected with a horizontal tie bar, and two adjacent column limbs 4 are fixedly connected with two cross-arranged diagonal tie bars, and the two ends of the diagonal tie bars are respectively fixed to the top and bottom ends of the two adjacent column limbs 4.

[0041] In the truss segment, the length of the column 4 is set to 2.5m. Under the premise of meeting the requirements of mountain road transportation limits, the lattice pier body is cut along the height direction with a module of 2.5m to form a standardized truss segment. For example, the lattice pier body of about 7.5m is welded together by three standardized truss segments. At the construction site, first, one of the truss segments is placed in the first reserved hole. After the first reserved hole and the concrete platform 22 are poured, the steel pipe column limbs of the prefabricated truss segment are vertically welded, and then self-compacting concrete is pumped into the steel pipe column limb to form a steel tube concrete lattice bridge pier. Finally, the lattice bridge pier is connected to the cap beam 3 through the second reserved hole to complete the assembly of the steel tube concrete pier.

[0042] Example 5:

[0043] This embodiment is further optimized based on embodiment 3. Figures 7 to 9 As shown, the six-limb lattice column is arranged as multiple truss segments along the height direction. The six-limb lattice column adopts a sub-module prefabrication process. The six-limb lattice column is arranged as two groups of symmetrically arranged three-limb lattice sub-modules. The sub-module includes three column limbs 4. The column limbs 4 are arranged in a triangular space layout. The two groups of sub-modules are arranged with parallel bottom sides and opposite vertices. The top ends of two adjacent column limbs 4 in the sub-module are fixedly connected with a cross tie bar, and two adjacent column limbs 4 are fixedly connected with two cross-arranged diagonal tie bars, and the two ends of the diagonal tie bar are respectively fixed to the top and bottom ends of the two adjacent column limbs.

[0044] At the construction site, first, a group of the truss segments are placed in the first reserved holes. After the first reserved holes and the concrete platform 22 are poured, the steel tube columns of the three-limb lattice submodule are vertically welded, and a horizontally parallel cross-strut structure is installed between the two groups of triangular trusses. Then, self-compacting concrete is pumped into the steel tube columns to form steel tube concrete lattice piers. Finally, the lattice piers are connected to the cap beam 3 through the second reserved holes to complete the assembly of the steel tube concrete piers.

[0045] Example 6:

[0046] This embodiment is further optimized on the basis of embodiment 1. Specifically, the inner wall of the first reserved hole is provided with a shear-resistant structure and a positioning guide device to ensure the precise alignment of the column limb 4 and the interface force transmission efficiency when it is inserted.

[0047] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0049] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An assembled steel tube concrete pier structure, characterized in that: include: Foundation pile (1); A bearing platform (2), the bearing platform (2) is fixedly arranged on the top of the foundation pile (1), and a plurality of first reserved holes are provided on the top of the bearing platform (2); A cap beam (3), wherein a plurality of second reserved holes are provided at the bottom of the cap beam (3); A column limb (4), wherein the column limb (4) is configured as a steel tube concrete column limb, the column limb (4) is disposed between the pedestal (2) and the cap beam (3), the bottom end of the column limb (4) is disposed in the first reserved hole, and the top end of the column limb (4) is disposed in the second reserved hole.

2. The prefabricated steel tube concrete pier structure according to claim 1, characterized in that: The number of the first reserved holes, the second reserved holes and the column limb (4) is the same, and the diameters of the first reserved holes and the second reserved holes are both larger than the diameter of the column limb (4).

3. The prefabricated steel tube concrete pier structure according to claim 1, characterized in that: The inner wall of the first reserved hole is provided with a shear-resistant structure and a positioning guide device.

4. The assembled steel tube concrete pier structure according to claim 1, characterized in that: Micro-expanding self-compacting concrete (21) is poured between the first reserved hole and the column limb (4).

5. The assembled steel tube concrete pier structure according to claim 1, characterized in that: A concrete platform (22) is provided on the top surface of the support platform (2), and the concrete platform (22) wraps the bottom of the column limb (4).

6. The assembled steel tube concrete pier structure according to claim 5, characterized in that: The concrete adding platform (22) can completely cover the first reserved hole.

7. The assembled steel tube concrete pier structure according to claim 1, characterized in that: The cap beam (3) is configured as a shell with a cavity formed on the upper surface, and concrete (31) is poured into the cavity.

8. The assembled steel tube concrete pier structure according to claim 1, characterized in that: A fastening piece (41) is provided between the column limbs (4), and the fastening piece (41) is fixedly connected to the column limbs (4).

9. The assembled steel tube concrete pier structure according to claim 8, characterized in that: The tie members (41) are arranged as a cross tie bar system, wherein a transverse tie bar is arranged between two adjacent pairs of cross tie bars, and the cross tie bar system and the column limbs (4) together form a truss-like spatially stable structure.

10. The assembled steel tube concrete pier structure according to claim 9, characterized in that: The lattice column adopts a prefabrication process, and the lattice column is arranged into a plurality of truss segments along the height direction. The truss segments are composed of the column limbs (4) and the cross tie bar system. The top ends of two adjacent column limbs (4) are fixedly connected with a cross tie bar, and two cross-arranged oblique tie bars are fixedly connected between two adjacent column limbs (4). The two ends of the oblique tie bar are respectively fixed to the top ends and the bottom ends of the two adjacent column limbs (4).

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