Gate-type pier cross beam based on prefabricated UHPC (Ultra High Performance Concrete) shell
Through the door pier beam technology with prefabricated UHPC shell, the high cost and safety risks caused by the heavy weight of the door pier beam is solved, and the construction cost and construction period are saved is achieved, and the impact on the road is reduced.
Patent Information
- Application Number
- CN202420844941.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The heavy weight of the gantry pier beam leads to high lifting costs and high safety risks. The overall cast-in-place construction requires formwork and brackets, which affects the construction period and road traffic.
The door-type pier beam with prefabricated UHPC shell is used to hoist unpoured concrete prefabricated parts onto the pier column after the pier column is completed, and poured to reduce lifting weight, save formwork and brackets, and reduce construction costs and safety risks.
It reduces construction costs and safety risks, shortens construction periods, and reduces the impact on ground roads between pier columns.
Smart Images
Figure CN222160913U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a portal pier beam based on a prefabricated UHPC shell. Background Art
[0002] The portal pier beam is an important part of the portal frame pier. The integral cast-in-place portal pier beam requires formwork and brackets. During installation, after the pier column construction is completed, the portal pier beam needs to be hoisted to the top of the column for installation. Due to the heavy weight of the portal pier beam, the hoisting operation requires equipment with a correspondingly large hoisting capacity, and the construction cost is expensive. At the same time, as the weight of the hoisted object increases, the safety risk of the hoisting operation also increases exponentially. At the same time, the construction period is long, which has a great impact on the passage of the ground road between the pier columns. Therefore, in order to reduce the construction cost and safety risk of the portal pier beam and shorten the construction period, a portal pier beam based on a prefabricated UHPC shell is proposed. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a portal pier crossbeam based on a prefabricated UHPC shell. After the construction of the pier column is completed, the prefabricated parts without concrete are hoisted to the pier column and installed before pouring, so that the hoisting weight is greatly reduced, and the construction cost and safety risk are reduced; at the same time, compared with the overall cast-in-place construction, it can save formwork and brackets, reduce the impact on the traffic of ground roads between pier columns, and save construction period.
[0004] The technical solution of the utility model is as follows:
[0005] A portal pier crossbeam based on a prefabricated UHPC shell comprises a prefabricated UHPC shell, an inner membrane steel plate, an inner support angle steel, a prestressed beam and cast-in-place concrete, wherein the prefabricated UHPC shell is composed of a U-shaped shell and side plates at both ends, the inner surface of the prefabricated UHPC shell is provided with an inner membrane steel plate, a plurality of inner support trusses composed of inner support angle steels and a plurality of prestressed beams are provided in the prefabricated UHPC shell, and cast-in-place concrete is provided in the prefabricated UHPC shell.
[0006] Shear nails are arranged on both sides of the inner membrane steel plate.
[0007] Bottom plate reinforcement holes are arranged at positions corresponding to the pier columns at both ends of the bottom of the U-shaped shell.
[0008] Angle steel reinforcement holes are arranged on the inner supporting angle steel.
[0009] Steel bars are installed in the steel angle steel through-holes, and the steel bars are common steel bars commonly used in construction projects.
[0010] Both ends of the prestressed bundle are fixedly connected to the side plates.
[0011] The prefabricated UHPC shell is set on top of the pier.
[0012] The main reinforcement of the pier column passes through the reinforcement holes of the bottom plate.
[0013] The beneficial effects of the utility model are:
[0014] The utility model discloses a portal pier crossbeam based on a prefabricated UHPC shell. After the construction of the pier column is completed, the prefabricated parts without concrete are hoisted onto the pier column and then cast after installation, so that the hoisting weight is greatly reduced, and the construction cost and safety risk are reduced; at the same time, compared with the overall cast-in-place construction, formwork and brackets can be saved, the impact on the passage of ground roads between the pier columns is reduced, and the construction period is saved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.
[0016] In the attached picture:
[0017] Figure 1 This is a front view of a portal pier beam based on a prefabricated UHPC shell according to an embodiment of the utility model;
[0018] Figure 2 A top view of a portal pier beam based on a prefabricated UHPC shell according to an embodiment of the utility model;
[0019] Figure 3 for Figure 1 Middle AA section view;
[0020] Figure 4 for Figure 1 Middle BB section view;
[0021] Figure 5 for Figure 1 Middle CC section view;
[0022] The components represented by the reference numerals in the figure are:
[0023] The utility model includes: 1. pier column, 1a. main reinforcement of pier column, 2. prefabricated UHPC shell, 2a. U-shaped shell, 2b. side plate, 2c. reinforcement hole of bottom plate, 3. inner membrane steel plate, 4. inner supporting angle steel, 4a. reinforcement hole of angle steel, 5. prestressed beam, 6. cast-in-place concrete. DETAILED DESCRIPTION
[0024] like Figures 1 to 5As shown, the portal pier beam based on the prefabricated UHPC shell includes a prefabricated UHPC shell 2, an inner membrane steel plate 3, an inner supporting angle steel 4, a prestressed tendon 5 and cast-in-place concrete 6.
[0025] like Figure 1 As shown, the prefabricated UHPC shell 2 consists of a U-shaped shell 2a and side panels 2b at both ends.
[0026] like Figures 3 to 5 As shown, the inner surface of the prefabricated UHPC shell 2 is provided with an inner membrane steel plate 3, a plurality of inner support trusses composed of inner support angle steels 4 and a plurality of prestressed beams 5 are provided in the prefabricated UHPC shell 2, and cast-in-place concrete 6 is provided in the prefabricated UHPC shell 2.
[0027] Shear studs are arranged on both sides of the inner membrane steel plate 3. Shear studs, also known as shear studs or studs, are a commonly used connector in civil engineering structures. Their main function is to connect the steel structure with the concrete to form a combined structure, ensuring that the two materials can work together to bear external loads together.
[0028] like Figure 1 and Figure 2 As shown, bottom plate reinforcement holes 2c are provided at positions corresponding to the pier columns 1 at both ends of the bottom of the U-shaped shell 2a.
[0029] like Figure 4 As shown, the inner supporting angle steel 4 is provided with an angle steel reinforcing hole 4a; steel bars are installed in the angle steel reinforcing hole 4a, and the steel bars are common steel bars commonly used in construction projects.
[0030] Both ends of the prestressed bundle 5 are fixedly connected to the side plate 2b.
[0031] The prefabricated UHPC shell 2 is arranged on the top of the pier 1; the main reinforcement 1a of the pier 1 passes through the reinforcement hole 2c of the bottom plate.
[0032] Construction process: After the construction of pier column 1 is completed, the uncast portal pier beam based on the prefabricated UHPC shell is hoisted to the top of the column, the main reinforcement 1a of the pier column passes through the reinforcement hole 2c of the bottom plate, and after the cast-in-place concrete 6 is poured, the prestressed tendons 5 are tensioned in batches after the strength meets the requirements.
[0033] After the pier construction is completed, the portal pier crossbeam based on the prefabricated UHPC shell hoists the prefabricated parts without concrete onto the pier and installs them before pouring, which greatly reduces the hoisting weight, reduces the construction cost and safety risks; at the same time, compared with the overall cast-in-place construction, it can save formwork and brackets, reduce the impact on the traffic on the ground road between the piers, and save construction time.
Claims
1. A portal pier beam based on a prefabricated UHPC shell, characterized in that: The invention comprises a prefabricated UHPC shell (2), an inner membrane steel plate (3), an inner support angle steel (4), a prestressed beam (5) and cast-in-place concrete (6); the prefabricated UHPC shell (2) is composed of a U-shaped shell (2a) and side plates (2b) at both ends; the inner surface of the prefabricated UHPC shell (2) is provided with an inner membrane steel plate (3); a plurality of inner support trusses composed of inner support angle steels (4) and a plurality of prestressed beams (5) are provided in the prefabricated UHPC shell (2); and cast-in-place concrete (6) is provided in the prefabricated UHPC shell (2).
2. A portal pier beam based on a prefabricated UHPC shell according to claim 1, characterized in that: Shear nails are arranged on both sides of the inner membrane steel plate (3).
3. A portal pier beam based on a prefabricated UHPC shell according to claim 1, characterized in that: Bottom plate rib holes (2c) are provided at both ends of the bottom of the U-shaped shell (2a).
4. A portal pier beam based on a prefabricated UHPC shell according to claim 1, characterized in that: Angle steel reinforcement holes (4a) are provided on the inner supporting angle steel (4).
5. A portal pier beam based on a prefabricated UHPC shell according to claim 4, characterized in that: Steel bars are installed in the angle steel reinforcement holes (4a).
6. A portal pier beam based on a prefabricated UHPC shell according to claim 1, characterized in that: Both ends of the prestressed bundle (5) are fixedly connected to the side plate (2b).
7. A portal pier beam based on a prefabricated UHPC shell according to claim 3, characterized in that: The prefabricated UHPC shell (2) is arranged on the top of the pier (1).
8. A portal pier beam based on a prefabricated UHPC shell according to claim 7, characterized in that: The main reinforcement bars (1a) of the pier column (1) pass through the reinforcement holes (2c) of the bottom plate.