Fabricated hollow pier structure with two ends tensioned and prestressed
By using a prestressed precast hollow pier structure with tension at both ends, combined with the design of precast pier caps and precast hollow pier column segments, and utilizing the tensioning and locking of prestressed steel strands and finely rolled threaded steel bars, the problems of numerous steel bar joints and large prestress loss in existing technologies are solved, achieving efficient construction and excellent load-bearing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, conventional precast hollow piers have a large number of steel bar joints that need to be grouted one by one, resulting in low production efficiency. Single-end tensioned prestressed precast piers have complex prestressed joints that suffer from high losses, affecting construction efficiency and load-bearing performance.
The prestressed precast hollow pier structure with tension at both ends is adopted. The precast pier cap and precast hollow pier column segments are cast in place on the concrete foundation and tensioned and locked with prestressed steel strands and finely rolled threaded steel bars. U-shaped anti-collapse steel bars and metal corrugated pipes are used to improve the structural performance and construction efficiency.
It improved construction efficiency, reduced prestress loss, enhanced the structural load-bearing performance, and achieved more efficient construction and better load-bearing performance.
Smart Images
Figure CN224031475U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of assembly type pier column, especially to a two-end tension prestressed assembly type hollow pier structure. BACKGROUND
[0002] With the continuous development of social economy, the standardization and informatization of construction projects are continuously improved, and there is a great demand for the stress performance and construction efficiency of standard prefabricated pier columns in the engineering construction process. Since the conventional prefabricated assembly type hollow pier uses a sleeve to connect ordinary steel bars, the number of steel bar joints is large and needs to be grouted one by one, the production efficiency is low, and the single-end tensioning mode is also used for the general prestressed assembly type pier column, the locking mode after the prestressed joint is complex, and the single-end tensioning prestress loss is large, which is not conducive to subsequent use. Therefore, it is necessary to consider the technical problem of designing a prefabricated hollow pier structure with better stress performance and higher construction efficiency. SUMMARY
[0003] The utility model aims at overcoming the problems in the prior art, providing a two-end tension prestressed assembly type hollow pier structure, which can achieve better stress performance and faster construction efficiency.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] A two-end tension prestressed assembly type hollow pier structure, comprising a prefabricated pier cap and a prefabricated hollow pier column segment, the prefabricated pier cap and the prefabricated hollow pier column segment are cast in situ on the concrete foundation through cast-in-situ concrete base, prestressed steel strands and finished deformed steel bars are arranged in the prefabricated pier cap and the prefabricated hollow pier column segment, a prestressed steel strand tensioning end anchor is arranged in the prefabricated pier cap, the prestressed steel strands are fixed at both ends of the U-shaped prestressed steel strand tensioning end anchor, a finished deformed steel bar tensioning end anchor is arranged in the prefabricated hollow pier column segment, a finished deformed steel bar fixed end anchor is arranged in the concrete foundation, and the finished deformed steel bar is tensioned and fixed by the finished deformed steel bar tensioning end anchor and the finished deformed steel bar fixed end anchor.
[0006] Further, the U-shaped anti-collapse steel bar at the U-shaped bottom in the concrete foundation is provided with a U-shaped anti-collapse steel bar and an anti-collapse steel bar stand.
[0007] Further, the U-shaped anti-collapse steel bar is arranged along the full length of the U-shaped curve segment, and the spacing between the two adjacent U-shaped anti-collapse steel bars is not greater than 10 cm.
[0008] Further, a metal bellows is arranged in the concrete foundation, and the prestressed steel strands pass through the metal bellows.
[0009] Further, the metal bellows is arranged in a cross shape.
[0010] Further, the precast hollow pier column segment has at least two sections, and an end anchor for tensioning the finished threaded steel bar is arranged in each precast hollow pier column segment to tension and lock the finished threaded steel bar at one end.
[0011] The precast pier cap and the precast hollow pier column segment can be processed, produced and manufactured in a factory, construction efficiency is improved, the prestressed steel strand structure tensioned at both ends can minimize the prestress loss, and the stress performance of the structure is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a schematic diagram of a two-end tensioned prestressed assembly type hollow pier structure of the utility model;
[0013] Figure 2 is a schematic diagram of the U-shaped anti-collapse steel bar and the anti-collapse steel bar frame stand;
[0014] Figure 3 is a top view of the prestressed steel strand and the finished threaded steel bar of the utility model.
[0015] As shown in the figure, 1 is a precast pier cap, 2 is a precast hollow pier column segment, 3 is a cast-in-place concrete base, 4 is a prestressed steel strand, 5 is a finished threaded steel bar, 6 is a prestressed steel strand tensioning end anchor, 7 is a finished threaded steel bar tensioning end anchor, 8 is a finished threaded steel bar fixed end anchor, 9 is an anti-collapse steel bar frame stand, 10 is a U-shaped anti-collapse steel bar, 11 is a concrete base, and 12 is a metal bellows. DETAILED DESCRIPTION
[0016] The utility model will be described in detail in combination with specific implementation cases, and the following implementation cases will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form.
[0017] As Figure 1 — Figure 3The utility model relates to a kind of two-end tension prestressed assembly type hollow pier structure, including prefabricated pier cap 1 and prefabricated hollow pier column section 2, prefabricated pier cap 1 and prefabricated hollow pier column section 2 are cast-in-situ on concrete foundation 11 by cast-in-situ concrete pedestal 3, prestressed steel strand 4 and finish rolling threaded steel bar 5 are provided in prefabricated pier cap 1 and prefabricated hollow pier column section 2, prestressed steel strand tension end anchorage 6 is provided in prefabricated pier cap 1, prestressed steel strand 4 is fixed on prestressed steel strand tension end anchorage 6 in U-shaped both ends, finish rolling threaded steel bar tension end anchorage 7 is provided in prefabricated hollow pier column section 2, finish rolling threaded steel bar fixed end anchorage 8 is provided in concrete foundation 11, finish rolling threaded steel bar 5 is tensioned and locked fixed by finish rolling threaded steel bar tension end anchorage 7 and finish rolling threaded steel bar fixed end anchorage 8.
[0018] The prefabricated pier cap 1 and the prefabricated hollow pier column section 2 of the present application are cast-in-situ on the concrete foundation 11 by the cast-in-situ concrete pedestal 3, the prefabricated pier cap 1 and the prefabricated hollow pier column section 2 are tensioned by the prestressed steel strand 4 and the finish rolling threaded steel bar 5, and then form a whole force, the prestressed steel strand 4 is in the shape of U, that is, the two ends of the prestressed steel strand 4 are bent by 180 degrees to change the direction, and the two ends are tensioned at the top of the prefabricated pier cap 1 by the prestressed steel strand tension end anchorage 6, the finish rolling threaded steel bar 5 is tensioned at the top of the prefabricated hollow pier column section 2 by the finish rolling threaded steel bar tension end anchorage 7 and the finish rolling threaded steel bar fixed end anchorage 8, which reduces the loss of prestress and improves the stress performance of the structure.
[0019] Further, the U-shaped anti-collapse steel bar 10 and the anti-collapse steel bar stand 9 are arranged at the U-shaped bottom of the prestressed steel strand 4 in the concrete foundation 11, which can effectively prevent the prestressed steel strand from cracking or breaking.
[0020] Further, the U-shaped anti-collapse steel bar 10 is arranged along the whole length of the U-shaped curve segment and uniformly distributed at the U-shaped bottom of the prestressed steel strand, and the spacing between two adjacent U-shaped anti-collapse steel bars 10 is not greater than 10 cm, so that the stress is uniform.
[0021] Further, the metal corrugated pipe 12 is arranged in the concrete foundation 11, the prestressed steel strand 4 passes through the metal corrugated pipe 12, the metal corrugated pipe is arranged by embedding and integrally poured with the concrete foundation, and the prestressed steel strand can pass through conveniently.
[0022] Further, the metal corrugated pipe 12 is arranged in the concrete foundation 11, the prestressed steel strand 4 passes through the metal corrugated pipe 12, the metal corrugated pipe is arranged by embedding and integrally poured with the concrete foundation, and the prestressed steel strand can pass through conveniently.
[0023] Further, the prefabricated hollow pier column section 2 has at least two sections, and a fine rolling threaded steel bar tensioning end anchor 7 is arranged in each prefabricated hollow pier column section 2 to perform single-end tensioning locking of the fine rolling threaded steel bar 5. A cast-in-situ concrete base 3 is arranged below the first prefabricated hollow pier column section 2 to form a whole with the pier column and the cast-in-situ concrete base 11, wherein the top surface of each prefabricated hollow pier column section 2 is tensioned and locked by the fine rolling threaded steel bar tensioning end anchor 7, and the prestressed steel strand 4 is tensioned at both ends by using a prestressed steel strand tensioning end anchor 6 at the top of the prefabricated pier cap 1, thereby improving the bearing capacity of the whole structure.
[0024] The above specific embodiments are used to explain and illustrate the present application, rather than limit the present application, and any modification and change made to the present application within the spirit and protection scope of the present application and the claims shall fall into the protection scope of the present application.
Claims
1. A prestressed hollow pier structure with tensioned ends, characterized in that: The precast pier cap (1) and precast hollow pier column segment (2) are cast in place on the concrete foundation (11) through a cast-in-place concrete base (3). Prestressed steel strands (4) and fine-rolled threaded steel bars (5) are installed in the precast pier cap (1) and precast hollow pier column segment (2). Tensioning end anchors (6) of prestressed steel strands are installed in the precast pier cap (1). The prestressed steel strands (4) are fixed at both ends of the prestressed steel strand tensioning end anchors (6) in a U-shape. Tensioning end anchors (7) of fine-rolled threaded steel bars are installed in the precast hollow pier column segment (2). Fixed end anchors (8) of fine-rolled threaded steel bars are installed in the concrete foundation (11). The fine-rolled threaded steel bars (5) are tensioned and locked by the tensioning end anchors (7) and the fixed end anchors (8).
2. The prestressed hollow pier structure with tensioned ends as described in claim 1, characterized in that... The prestressed steel strand (4) is provided with U-shaped anti-collapse reinforcement (10) and anti-collapse reinforcement support (9) at the U-shaped bottom of the concrete foundation (11).
3. The prestressed hollow pier structure with tensioned ends as described in claim 2, characterized in that... The U-shaped anti-collapse reinforcement (10) is set along the entire length of the U-shaped curve segment, and the spacing between two adjacent U-shaped anti-collapse reinforcements (10) is no more than 10cm.
4. The prestressed hollow pier structure with tensioned ends as described in claim 1, characterized in that... A metal corrugated pipe (12) is installed inside the concrete foundation (11), and prestressed steel strands (4) pass through the metal corrugated pipe (12).
5. A prestressed hollow pier structure with tensioned ends as described in claim 4, characterized in that... The metal bellows (12) are arranged in a cross shape.
6. The prestressed hollow pier structure with tensioned ends as described in claim 1, characterized in that... The precast hollow pier segment (2) has at least two sections, and each precast hollow pier segment (2) is equipped with a tensioning end anchor (7) for tensioning the fine-rolled threaded steel bar (5) at one end.