Rockfill concrete less layer pouring device
Patent Information
- Application Number
- CN202521980486.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-09-15
Smart Images
Figure CN224717076U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a multi-layered pouring device for riprap concrete. Background Technology
[0002] Rockfill concrete is mainly used in dams. Excessive concrete flow distance can lead to two problems: firstly, concrete segregation; and secondly, it increases the risk of initial setting clogging the gaps in the rockfill, resulting in voids at the bottom of the rockfill. Therefore, it is usually constructed by layering and pouring the concrete layer by layer, with the layer height generally controlled between 1.5m and 3m (e.g., the layer height for gravity dams can be set at 1.5-3m, and for arch dams at 1.5-2.5m).
[0003] However, this layered pouring method can easily lead to an increase in horizontal construction joints, affecting the integrity and structural strength of the concrete. Therefore, there is an urgent need for a device that can reduce the number of layers, improve pouring efficiency, and ensure the integrity of the concrete. Utility Model Content
[0004] In view of this, the present invention provides a multi-layered concrete pouring device for riprap concrete, which can pour concrete from the bottom of each layer, avoiding segregation and voids at the bottom of the riprap caused by excessively long concrete flow paths. It ensures pouring efficiency while reducing the number of layers, thereby reducing horizontal joints and improving the integrity of the riprap concrete.
[0005] This utility model is achieved through the following technical solution: a multi-layered concrete pouring device, wherein the multi-layered pouring device is a hollow columnar structure, the hollow part of the columnar structure is used to contain the conveying pump pipe of concrete slurry; the side wall of the columnar structure is a grid structure composed of several cross-connected steel bars, and the coarse aggregate with the largest particle size in the concrete slurry can pass through any grid in the grid structure.
[0006] Furthermore, the columnar structure is a cylinder, and the inner diameter of the horizontal cross-section of the cylinder is not less than twice the inner diameter of the delivery pump pipe; or the columnar structure is a prism, and the shortest side length of the horizontal cross-section of the prism is not less than twice the inner diameter of the delivery pump pipe.
[0007] Furthermore, the reinforcing bars are divided into vertical bars and stirrups; the vertical bars are set vertically, and the stirrups are set horizontally.
[0008] Furthermore, the spacing between vertical reinforcement bars on the same side of the columnar structure shall not be less than twice the maximum particle size of the coarse aggregate; the spacing between stirrups shall not be less than twice the maximum particle size of the coarse aggregate.
[0009] Furthermore, the vertical reinforcement is located outside the stirrup, where "outside" refers to the side of the stirrup away from the delivery pump pipe.
[0010] Compared with existing technologies, the beneficial effects of this utility model are:
[0011] 1. This utility model is applicable to dam rockfill concrete projects. Compared with the traditional layered pouring of self-compacting concrete, which involves pouring from top to bottom on the top of the rockfill, the use of a multi-layered pouring device allows concrete slurry to be poured from bottom to top on the bottom of the rockfill. This reduces the number of layers required for the rockfill concrete and improves the integrity of the rockfill concrete by reducing the number of horizontal construction joints.
[0012] 2. In this utility model, the vertical reinforcing bars are set vertically, and the spacing between the vertical reinforcing bars on the same side of the column structure is not less than twice the maximum particle size of the coarse aggregate; the stirrups are set horizontally, and the spacing between the stirrups on the same side of the column structure is not less than twice the maximum particle size of the coarse aggregate; this makes each grid in the mesh structure similar in shape and size, ensuring that the rate at which concrete slurry flows out of the mesh structure is similar at different working heights, further ensuring the stability of the overall structure.
[0013] 3. The vertical reinforcement of this utility model is set on the outside of the stirrup, which can better resist the damage of the stone block to the welding point. Attached Figure Description
[0014] Figure 1 This is a top view of the present invention.
[0015] Figure 2 This is a front view of the present utility model.
[0016] Figure 3 This is a schematic diagram of the horizontal cross-section of this utility model.
[0017] Figure 4 This is a vertical cross-sectional view of the present invention.
[0018] Among them, 1-multi-layered pouring device, 11-vertical reinforcement, 12-stirrup; 2-rockfill; 3-pump pipe; 4-concrete slurry. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0020] This utility model provides a device for multi-layered pouring of riprap concrete, such as... Figure 1 , 2 As shown, the multi-layered pouring device 1 is a hollow columnar structure. The hollow part of the columnar structure is used to accommodate the delivery pump pipe 3. When in use, the multi-layered pouring device 1 is placed vertically, and boulders (piled stones 2) are piled around it. The delivery pump pipe 3 extends from the top of the columnar structure.
[0021] The sidewall of the columnar structure is a grid structure formed by several intersecting steel bars. In other words, the grid structure contains several grids, and the coarse aggregate with the largest particle size in the concrete grout 4 can pass through any grid in the grid structure, ensuring that the concrete grout 4 can flow smoothly from the grid to the gaps in the riprap 2.
[0022] In some embodiments, the columnar structure is a cylinder, and the inner diameter of the horizontal cross-section of the cylinder is not less than twice the inner diameter of the delivery pump pipe 3; or the columnar structure is a prism, and the shortest side length of the horizontal cross-section of the prism is not less than twice the inner diameter of the delivery pump pipe 3.
[0023] The volume occupied by the multi-layered pouring device 1 is only a very small part compared to each layer of integral riprap concrete. Therefore, even if the riprap 2 is not placed inside the multi-layered pouring device 1, it will not affect the overall structural strength. However, in order to ensure convenient construction, the horizontal cross-section of the column structure should not be too large without affecting the operation of the concrete delivery pump pipe 3. For example, if the column structure is a cylinder, the inner diameter of the horizontal cross-section of the cylinder should not be greater than 4 times the inner diameter of the delivery pump pipe 3.
[0024] Several reinforcing bars are intersected and connected, and the shape of the grid formed is not limited. Preferably, each grid has a similar shape and size to ensure that the rate at which concrete slurry flows out of the grid structure is similar at different working heights, thereby further ensuring the stability of the overall structure.
[0025] like Figure 3 , 4 As shown, the reinforcing bars are divided into vertical bars 11 and stirrups 12. The type and spacing of vertical bars 11 and stirrups 12 can be designed according to the size of the stone blocks. The type and spacing of the reinforcing bars can ensure that the multi-layer pouring device 1 will not be damaged during the stone block stacking process, thus affecting the later pouring.
[0026] In some embodiments, the vertical reinforcing bars 11 are arranged vertically, and the spacing between the vertical reinforcing bars 11 on the same side of the columnar structure is not less than twice the maximum particle size of the coarse aggregate; wherein, if the columnar structure is a cylinder, then the same side is the side of the cylinder. The stirrups 12 are arranged horizontally, and the spacing between the stirrups 12 is not less than twice the maximum particle size of the coarse aggregate.
[0027] In some embodiments, the vertical rib 11 is disposed outside the stirrup 12, and the outside refers to the side of the stirrup 12 away from the delivery pump pipe 3; the connection between the vertical rib 11 and the stirrup 12 is welded, and the vertical rib 11 is disposed outside the stirrup 12 to better resist the damage of the weld point to the stone block.
[0028] In this embodiment, the multi-layer pouring device 1 adopts a cubic structure. The size of the multi-layer pouring device 1 is designed according to the actual pouring conditions. According to the relevant provisions of the "Code for Construction of Concrete Structures" (GB 50666-2011), when the maximum particle size of coarse aggregate in concrete is not greater than 40mm, the inner diameter of the conveying pump pipe 3 should not be less than 150mm. Therefore, the horizontal cross-sectional dimensions of the cubic structure can be set at 300mm×300mm, and the height should not be less than the height of each layer of concrete. The vertical reinforcement 11 and the stirrups 12 are made of φ14 steel bars. The vertical reinforcement 11 is spaced at 87mm, and the stirrups 12 are spaced at 200mm. The vertical reinforcement 11 is arranged on the outside of the stirrups 12 to better resist the damage of the boulders to the weld points.
[0029] The working principle is as follows: Several multi-layer pouring devices 1 are arranged according to the volume of the rubble concrete and the properties of the concrete mixture, and the principle of arranging them one by one according to the spread of the concrete must be met within the pouring area. Stone blocks are piled around the multi-layer pouring devices 1 to prevent them from being bumped, damaged, or displaced during the stacking process. The concrete delivery pump pipe 3 is inserted into the multi-layer pouring device 1, and the rubble concrete is poured from bottom to top. During the pouring process, the flow of concrete slurry 4 can be observed at any time, and the working height of the delivery pump pipe 3 can be adjusted as needed.
[0030] Using the multi-layer pouring device 1, the delivery pump pipe 3 can pour concrete slurry 4 at the bottom of the rubble pile 2, shortening the flow path of the concrete slurry 4 and avoiding segregation and voids at the bottom of the rubble pile 2 caused by the excessively long flow path of the concrete slurry 4. Therefore, the height of each layer of concrete structure can be increased at the same time, that is, the number of layers can be reduced, thereby reducing horizontal joints and improving the integrity of the rubble pile concrete.
[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A multi-layered pouring device for riprap concrete, characterized in that, The multi-layered pouring device is a hollow columnar structure, and the hollow part of the columnar structure is used to hold the conveying pump pipe of concrete slurry. The sidewalls of the columnar structure are a grid-like structure formed by several intersecting steel bars, and the coarse aggregate with the largest particle size in the concrete slurry can pass through any grid in the grid-like structure.
2. The multi-layered pouring device for riprap concrete as described in claim 1, characterized in that, The columnar structure is a cylinder, and the inner diameter of the horizontal cross-section of the cylinder is not less than twice the inner diameter of the delivery pump pipe; Alternatively, the columnar structure may be a prism, wherein the shortest side length of the horizontal cross-section of the prism is not less than twice the inner diameter of the pump pipe.
3. The multi-layered pouring device for riprap concrete as described in claim 1, characterized in that, The reinforcing bars are divided into vertical bars and stirrups; the vertical bars are set vertically and the stirrups are set horizontally.
4. The multi-layered pouring device for riprap concrete as described in claim 3, characterized in that, The spacing between vertical reinforcement bars on the same side of the columnar structure shall not be less than twice the maximum particle size of the coarse aggregate; the spacing between stirrups shall not be less than twice the maximum particle size of the coarse aggregate.
5. The multi-layered pouring device for riprap concrete as described in claim 3 or 4, characterized in that, The vertical reinforcement is located outside the stirrups, where "outside" refers to the side of the stirrups away from the pump pipe.