Distribution rack for pouring large-section hollow pier concrete
By designing a fabric trellis for concrete pouring of large section hollow piers for bridge engineering, the problems of uneven fabric, slow pouring speed and high labor intensity during the traditional pouring process are solved, and efficient and uniform concrete pouring is achieved and construction costs are reduced.
Patent Information
- Application Number
- CN202422196888.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In bridge projects, during the concrete pouring process of traditional large-section hollow piers, the fabric is uneven, the pouring speed is slow, the labor intensity is high, and the pouring quality is poor.
A fabric trellis for pouring large section hollow pier concrete is designed, including a support frame body, operating platform, discharge trough and discharge trough. The conveying path of the concrete is controlled through the gate to achieve uniform fabrication and efficient casting.
This fabric pedestal can effectively improve the quality and efficiency of concrete pouring, reduce the labor intensity of workers, reduce concrete spilling, and improve overall construction efficiency.
Smart Images
Figure CN223033855U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pier construction in bridge engineering, and particularly relates to a placing gantry for pouring concrete of a large-section hollow pier. Background Art
[0002] With the rapid development of bridge engineering in China, in order to solve traffic problems such as spanning mountains and rivers, more and more large-section hollow piers have been applied. Among them, the concrete pouring of large-section hollow piers is a difficult problem faced in construction. Traditionally, for large-section hollow piers, a ground pump is generally used to pump concrete to the working surface. During the pouring process, the conveying pipe is manually moved to the pouring surface multiple times for pouring. The steel bars in the hollow pier are dense and the space is narrow, so it is relatively difficult to manually move the conveying pipe. Moreover, during the movement, the concrete is likely to spill, resulting in increased costs, and the manual placing is not uniform enough, affecting the pouring quality. Therefore, there is an urgent need for a concrete pouring device that can not only place the concrete evenly to improve the concrete pouring speed, but also reduce the labor intensity of the operators. Content of the Utility Model
[0003] In order to solve the technical problems of uneven placing, slow pouring speed, high labor intensity of personnel, and poor pouring quality during the concrete pouring of large-section hollow piers of bridges, the utility model provides a placing gantry for pouring concrete of large-section hollow piers.
[0004] The technical solution adopted by the utility model is as follows: a placing gantry for pouring concrete of a large-section hollow pier, including a support frame body. An operation platform is arranged at the top of the support frame body, and guardrails are arranged around the operation platform. A return-shaped placing groove is arranged at the middle position above the operation platform. A discharge port is arranged on the outer side plate of the placing groove for one week. A gate is arranged at the discharge port and is connected to a discharge chute. The operation platform is provided with a hole for the discharge chute to pass through obliquely downward. The discharge chutes on the left and right sides are connected to long chutes, and the discharge chutes on the front and rear sides are connected to string buckets. The concrete is directly pumped into the placing groove. By opening the corresponding gate, the concrete can be transported to each pouring surface.
[0005] Further, discharge ports are arranged at both ends of the outer side plates on the left and right sides and in the middle of the outer side plates on the front and rear sides of the placing groove.
[0006] Further, the support frame body includes four columns. The bottom and top of the columns are respectively welded to the columns by four cross bars. The lengths of the two left and right cross bars at the bottom are greater than the inner cavity of the pier body. Two top cross braces are fixed in the middle of the top cross bar to support the placing groove. Cross braces and vertical braces are arranged between the columns.
[0007] Further, a ladder is installed on the side of the support frame body.
[0008] Further, the guardrail includes vertical railings arranged at the four corners of the gantry, and horizontal railings are arranged at the top and middle of the vertical railings. A safety net with dense meshes is hung on the outer side of the horizontal railings and vertical railings.
[0009] Furthermore, a trapezoidal hopper is provided between the string bucket and the discharge chute.
[0010] A concrete placing gantry for pouring large-section hollow piers of the present utility model can evenly convey concrete to the pouring surface, avoiding the need for operators to repeatedly move the conveying pipe between various pouring surfaces. The placing gantry has a simple structure, is easy to manufacture, is portable to move, effectively improves the quality and efficiency of concrete pouring, greatly reduces the labor intensity of operators, and has extremely wide popularization value. Description of the Drawings
[0011] Figure 1 is the front view of the present utility model;
[0012] Figure 2 is the top view of the present utility model;
[0013] Figure 3 is the side view of the present utility model.
[0014] In the figures: 1, support frame; 11, cross bar; 12, column; 13, cross brace; 14, vertical brace; 15, top cross brace; 16, ladder; 2, operating platform; 3, guardrail; 31, horizontal railing; 32, vertical railing; 33, close-meshed safety net; 4, discharging trough; 5, discharge chute; 51, gate; 6, long chute; 7, string bucket; 71, trapezoidal hopper. Detailed Embodiment
[0015] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a concrete placing gantry for pouring large-section hollow piers of the present utility model with reference to the drawings.
[0016] As Figures 1 to 3 shown, a concrete placing gantry for pouring large-section hollow piers includes a support frame 1 made of square steel pipes welded together. An operating platform 2 for operators is provided at the top of the support frame 1. A guardrail 3 is provided around the operating platform 2. A U-shaped discharging trough 4 is provided in the middle above the operating platform 2. Discharge openings are provided in the middle of the outer side plates on the left and right sides and the front and rear sides of the discharging trough 4. A gate 51 is provided at each discharge opening and is connected to a discharge chute 5. The gate 51 can be lifted and inserted. The discharge chute 5 is a short U-shaped chute. The operating platform 2 is provided with holes for six discharge chutes 5 to pass through obliquely downward. The discharge chutes 5 on the left and right sides are connected to a long chute 6, and the discharge chutes 5 on the front and rear sides are connected to string buckets 7. Concrete is directly pumped into the discharging trough 4. By opening the corresponding gate 51, the concrete can be conveyed to each pouring surface, and two workers are arranged at each pouring surface for vibration.
[0017] In this embodiment, the support frame 1 includes four columns 12. At the bottom and top of the columns 12, four cross bars 11 are respectively welded to the columns 12. The two left and right cross bars 11 at the bottom are slightly longer, with a length greater than the inner cavity of the pier body by 60 cm. Both the cross bars 11 and the columns 12 are made of square steel pipes with a size of 80×80×3.2 mm. At the middle of the cross bar 11 at the top, two top cross braces 15 made of square steel pipes with a size of 80×80×3.2 mm are welded to support the material discharging trough 4. Between the columns 12, cross braces 13 and vertical braces 14 made of square steel pipes with a size of 60×60×3.2 mm are welded. Two cross braces 13 are arranged on each side, two front and rear vertical braces 14 are arranged, and one left and right vertical brace 14 is arranged to increase the overall stability of the frame body.
[0018] One ladder 16 is installed on the side of the support frame 1 for the convenience of personnel to go up and down. The width of the ladder 16 is 30 cm, and the step spacing is 30 cm. The ladder 16 is welded to the cross bar 11 with φ16 threaded steel bars.
[0019] The guardrail 3 on the top of the operation platform 2 is made of steel pipe railings with a size of φ50×3 mm. Vertical railings 32 are arranged at the four corners of the platform frame, with a height of 1.2 m. Two horizontal railings 31 are arranged. The first one is arranged at the top of the vertical railing 32, and the second one is 60 cm away from the first one. The horizontal railing 31 is firmly welded to the vertical railing 32, and a dense mesh safety net 33 is hung outside the railing.
[0020] A square-shaped material discharging trough 4 is arranged in the middle of the distribution platform frame 2, with a height of 20 cm. The material discharging trough 4 is made of 5 mm thick steel plate and welded on the top cross brace 15. A notch is left at the position of the discharging trough 5 and a gate 51 is arranged. The gate 51 is composed of a plug board and a U-shaped card slot. The plug board is made of 5 mm thick steel plate, and the U-shaped card slot is bent and welded with 2 mm thick steel plate on both sides of each notch, which is convenient for the plug board to be pulled up and inserted.
[0021] A total of six discharging troughs 5 are arranged. The angles of the four discharging troughs 5 in the upper left, lower left, upper right, and lower right corners point to the four corners of the pier body, and the angles of the two middle discharging troughs 5 point to the middle positions of the long sides of the pier body. The specific length and angle of the discharging trough 5 need to be determined according to the actual cross-sectional dimensions of the pier column. The discharging trough 5 is welded with 2 mm thick iron sheet, one end of which is welded to the discharging port of the material discharging trough 4, and the discharging trough 5 is fixed under the operation platform 2 on the first cross brace 13.
[0022] For the parts with a long pouring distance, a long chute 6 is used to convey concrete. The long chute is made of 2 mm thick iron sheet. One end is firmly tied to the discharging trough 5 with iron wire, and the other end is placed on the pouring surface. The length of the long chute 6 can be appropriately longer, and the specific length is determined according to the design dimensions of the pier body. For the parts with a short pouring distance, a concrete hopper 7 is used. A trapezoidal hopper 71 is arranged between the hopper 7 and the discharging trough 5 to prevent the concrete from spilling.
[0023] After all components of the material distribution platform are firmly assembled on the ground, the platform is lifted to the center of the inner cavity of the pier body by a lifting device, and the longer cross bar 11 is placed on the cross ribs of the inner mold. Before the platform is in place, the stress condition of the inner mold needs to be checked and calculated. If it does not meet the requirements, the inner formwork needs to be reinforced. After the platform is in place, φ6 steel bars are used to firmly bind the four columns 12 of the platform to the main reinforcement of the pier body to prevent the platform from overturning under the impact load of concrete.
[0024] Concrete is centrally produced by qualified mixing stations, and the selection of concrete raw materials is strictly controlled. Cement with excellent volume stability and low heat, and aggregates with dense structure and sufficient strength are selected. Tap water is used to mix concrete, and the temperature is more suitable for pouring. Concrete is transported by special concrete tankers. When the concrete is transported to the construction site, it should be poured immediately. When the concrete arrives at the site, the concrete quality is tested and qualified before pouring.
[0025] After the construction of reinforcement and internal formwork is completed, it is necessary to comprehensively review and verify the formwork elevation and stability of the formwork support, the accuracy of the embedded parts, clean the attachments on the formwork, rinse with clean water before pouring, or use an air compressor and vacuum cleaner to clean the inside of the beam formwork, otherwise it will directly affect the strength and appearance quality of the concrete.
[0026] Concrete is delivered by pumping, and the front section of the pump pipe uses a plastic hose. Before pouring concrete, the same grade of mortar must be used to pave the bottom. Layered pouring is adopted, and the thickness of each layer is controlled to be 30cm. The material is distributed one by one according to the order of the discharge ports. When distributing the material, the gate 51 of the corresponding discharge port is opened, and the gates 51 of the other five discharge ports are closed. After a certain amount of concrete is poured at the previous discharge port, the gate 51 of the discharge port is closed and the gate 51 of the next discharge port is opened. The concrete plastic hose is moved manually, and the plastic hose is always kept moving in the discharge trough 4 to prevent the concrete from spilling. The concrete is vibrated by a Ф50 type insert vibrator. The concrete operation procedures must be strictly followed during vibration. The vibrating rod cannot contact the template. Do not use a vibrator to drive concrete to flow long distances or transport concrete in the formwork so as to avoid segregation of the concrete. The concrete should be vibrated to make it dense, as indicated by the concrete stopping sinking, no bubbles, no slurry, and a flat surface. The concrete should not be vibrated from 1.5 hours after it has been compacted to before it begins to set.
[0027] The pier body can be demoulded after its concrete strength reaches 10Mpa. After demoulding, it can be cured by sprinkling water, and the curing time shall not be less than 14 days.
[0028] It can be understood that the present utility model is described by way of some embodiments. Those skilled in the art will be aware that, without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. A material distribution stand for pouring large-section hollow pier concrete, characterized in that: The invention comprises a support frame (1), an operating platform (2) is arranged on the top of the support frame (1), guardrails (3) are arranged around the operating platform (2), a U-shaped discharge trough (4) is arranged in the middle position above the operating platform (2), a discharge port is arranged on the outer side plate around the discharge trough (4), a gate (51) is arranged at the discharge port and connected to the discharge trough (5), a hole is opened on the operating platform (2) for the discharge trough (5) to pass obliquely downward, the discharge troughs (5) on the left and right sides are connected to the long chute (6), and the front and rear discharge troughs (5) are connected to the barrel string (7), concrete is directly pumped into the discharge trough (4), and the corresponding gate (51) is opened to transport the concrete to each casting surface.
2. The material distribution stand for pouring large-section hollow pier concrete according to claim 1 is characterized in that: Discharging ports are arranged at both ends of the left and right outer plates and in the middle of the front and rear outer plates of the discharge trough (4).
3. The material distribution stand for pouring large-section hollow pier concrete according to claim 1 is characterized in that: The support frame (1) comprises four columns (12), the bottom and top of the columns (12) are respectively welded with four cross bars (11), the length of the two left and right cross bars (11) at the bottom is greater than the inner cavity of the pier body, two top cross braces (15) are fixed in the middle of the top cross bar (11) for supporting the discharge trough (4), and cross braces (13) and vertical braces (14) are arranged between the columns (12).
4. The material distribution stand for pouring large-section hollow pier concrete according to claim 1 or 3, characterized in that: A ladder is installed on the side of the support frame (1).
5. The material distribution stand for pouring large-section hollow pier concrete according to claim 1 is characterized in that: The guardrail (3) comprises vertical railings (32) arranged at the four corners of the platform, transverse railings (31) arranged at the top and middle of the vertical railings (32), and dense mesh safety nets (33) are hung outside the transverse railings (31) and the vertical railings (32).
6. The material distribution stand for pouring large-section hollow pier concrete according to claim 1 is characterized in that: A trapezoidal hopper (71) is provided between the barrel string (7) and the discharge chute (5).