Fog gun machine mounting platform fixed on straight surface template of roller compacted concrete dam

Abstract

The utility model provides a fog gun machine mounting platform fixed on a roller compacted concrete dam straight surface template. The fog gun machine mounting platform comprises a cantilever turning and lifting steel template, platform supporting legs, platform vertical rods, platform tie bars and a platform panel, the cantilever turning and lifting steel formwork is a necessary steel formwork for roller compacted concrete dam construction, and a lug part is arranged at the top end of a back main beam truss of the cantilever turning and lifting steel formwork. Hinge holes are formed in the positions, corresponding to the lug parts, of the bottom ends of the platform supporting legs. The bottom ends of the platform supporting legs are installed on the cantilever overturning and lifting steel formwork in a hinged mode through the hinge holes and the lug parts. The platform vertical rods and the platform tie bars are spliced and welded to form a platform frame surrounding the tops of the platform supporting legs. The platform panel is installed at the lower end of the platform frame and used for placing the fog gun machine. The platform has the advantages that the fog gun mounting requirement of the roller compacted concrete dam can be met, and the space of a dam bin surface is not occupied.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower construction technology, specifically to a mist cannon installation platform fixed on the straight template of a roller-compacted concrete dam. Background Technology

[0002] Roller-compacted concrete (RCC) dams are constructed using a layered unloading, spreading, and compaction method. During construction, the surface of the RCC concrete layer must be kept moist. Especially during construction in windy, dry, or high-temperature conditions, surface spraying is necessary to create a microclimate that prevents moisture loss from the concrete surface and ensures the quality of the bond between RCC layers. Currently, commonly used surface spraying and moisturizing methods include mobile sprayers, spray trucks, and manual hand-held spray guns. However, as the RCC dam gradually rises and narrows during construction, all of these spraying methods have varying degrees of impact on the progress and quality of the dam construction.

[0003] When using mobile sprayers for moisturizing during dam construction, several units are pre-positioned within the dam compartment and moved to spray and cover the surface. However, this method suffers from the problem of heavy equipment moving on already compacted concrete strips, which may compromise construction quality and cause vehicles to get stuck. Using spray trucks involves driving the truck into the compartment or spraying from the front. This method encroaches on the compartment space, affecting the normal operation of concrete transport vehicles, especially when the compartment area is large, resulting in insufficient effective spray coverage. Currently, handheld spray guns can only provide auxiliary spraying, and their effectiveness is far inferior to mechanical spraying, failing to meet the large-area coverage requirements of the dam compartment.

[0004] To address the limitations of existing spraying methods, it is necessary to develop a mist cannon installation platform that can be pre-installed and fixed on roller-compacted concrete dams. This would meet the needs of dams that gradually increase in height and narrow in width, while not occupying dam surface space, thereby improving dam construction efficiency. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a fog cannon installation platform that can meet the installation requirements of fog cannons on roller-compacted concrete dams without occupying the dam surface space. This platform is fixed on the straight template of the roller-compacted concrete dam.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a fog cannon installation platform fixed on the straight template of a roller-compacted concrete dam, including a cantilevered steel template, platform legs, platform uprights, platform tie rods, and platform panel;

[0007] The cantilevered steel formwork is an essential steel formwork for the construction of roller-compacted concrete dams, and the top of the main beam truss of the cantilevered steel formwork is provided with ears.

[0008] The bottom end of the platform leg is provided with a hinge hole corresponding to the ear, and the bottom end of the platform leg is hinged to the cantilever lifting steel template through the hinge hole and the ear.

[0009] The platform uprights and platform tie rods are assembled and welded to form a platform frame that surrounds the top of the platform legs;

[0010] The platform panel is installed at the lower end of the platform frame and is used to place the fog cannon.

[0011] Preferably, the top of the platform leg is fixed at a position slightly behind the platform frame, so that the platform frame as a whole forms an eccentric structure relative to the platform leg.

[0012] Preferably, the bottom end of the platform leg is a flat steel, the ear on the back main beam truss of the cantilever lifting steel formwork is a matching round hole, and the hinge hole and the round hole at the bottom end of the platform leg are hinged together by bolts, nuts and washers.

[0013] Preferably, the length of the platform support leg is greater than the distance between the ear of the cantilevered steel formwork and the surface of the roller-compacted concrete dam.

[0014] Preferably, there are two ears with a spacing of more than 1.5m, and the distance between the ears and the vertical surface of the roller-compacted concrete dam is ≥1.2m.

[0015] Preferably, the upper surface of the platform panel is provided with an anti-slip pattern.

[0016] Preferably, the height of the platform upright is ≥1.2m, and the length of the platform tie rod is between 1.2m and 2m.

[0017] Preferably, the platform has two legs, and the distance between the two platform legs is equal to the distance between the ears.

[0018] Preferably, the platform panel is made of 4mm thick Q235B patterned steel plate.

[0019] Preferably, both the platform uprights and the platform tie rods are made of steel pipes.

[0020] This utility model has substantial features and advancements compared to existing technologies. Specifically, it utilizes the common practice of using cantilevered steel formwork in the construction of roller-compacted concrete dams. Based on the existing lifting lug structure of the main beam truss structure on the back of the cantilevered steel formwork, it uses this lug as the ear. Then, it designs a platform structure with guardrails. The bottom of the platform is hinged to the ear via platform legs, and the top rests on the construction site surface using its own weight. This provides usable space for the installation of the fog cannon. At the same time, this space does not occupy the area of ​​the construction site surface and can be raised along with the cantilevered steel formwork, which is highly compatible with the construction requirements of roller-compacted concrete dams. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of a fog cannon installation platform fixed on the straight template of a roller-compacted concrete dam, according to this utility model.

[0022] Figure 2 This is a top view of the platform frame in this utility model.

[0023] Figure 3 This is a side view of the platform frame in this utility model.

[0024] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0025] In the diagram: 1. Platform uprights; 2. Platform tie rods; 3. Platform panels; 4. Platform legs; 5. Roller-compacted concrete dam; 6. Cantilevered steel formwork; 7. Back beam truss of the cantilevered steel formwork; 8. Bolts. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0027] like Figures 1-4 As shown, a fog cannon installation platform fixed on the straight formwork of a roller-compacted concrete dam includes a cantilevered steel formwork 6, platform legs 4, platform uprights 1, platform tie rods 2, and platform panel 3.

[0028] Currently, the industry commonly uses cantilevered steel formwork 6 for the construction of roller-compacted concrete dams. Therefore, the cantilevered steel formwork 6 is an essential steel formwork for the construction of roller-compacted concrete dams 5. Except for a small area at the bottom with a slope ratio of 1:0.2, the upstream of the roller-compacted concrete dam is entirely vertical. Since two lifting lugs are reserved at the top of the main beam truss for easy hoisting during the fabrication of the cantilevered steel formwork 6, and the two main beam trusses are 1.8m apart and 1.2m away from the formwork panel, this provides an installation foundation for the platform structure in this embodiment for the installation of the dam surface fog cannon.

[0029] Specifically, the top of the main beam truss 7 of the cantilevered steel formwork is provided with ears. The ears can use the original lifting ear structure or two new hinge holes can be set, which can be selected as needed.

[0030] The platform support leg 4 has two legs, the spacing between the platform support legs and the spacing between the ears are equal, and the bottom end is provided with a hinge hole corresponding to the ear. The bottom end of the platform support leg 4 is hinged to the cantilever lifting steel formwork 6 through the hinge hole and the ear. Due to the structural characteristics of the back main beam truss, the platform support leg 4 is made of flat steel in this embodiment, which makes it easier to process the hinge hole that matches the ear on the back main beam truss. The hinge hole and the round hole at the bottom end of the platform support leg are hingedly connected by bolts 8, nuts and washers.

[0031] The platform uprights 1 and platform tie rods 2 are assembled and welded to form a platform frame that surrounds the top of the platform legs. The platform uprights 1 form the uprights at the four corners of the platform, and the platform tie rods 2 are horizontally connected to adjacent platform uprights 1 to form a rectangular frame. In this embodiment, both platform uprights 1 and platform tie rods 2 are made of φ48*3.0 steel pipe, and the length can be selected as needed. In this embodiment, the platform uprights are 1.2m high, and the platform tie rods are available in two lengths: 1.8m and 1.2m, forming a 1.8*1.2m platform frame.

[0032] In other embodiments, the platform poles can also be selected at other heights greater than the 1.2m safety height, and the platform tie rods can also be selected in more sizes to accommodate fog cannons of different specifications.

[0033] The platform panel 3 is installed at the lower end of the platform frame and is used to place the fog cannon. The platform panel 3 is made of 4mm thick Q235B patterned steel plate, and its length and width match the size of the platform tie rod. The patterned structure on the surface is used for anti-slip.

[0034] The top of the platform support leg 4 is fixed to the rear of the platform frame so that the platform frame as a whole forms an eccentric structure relative to the platform support leg. The length of the platform support leg is greater than the distance between the ear of the cantilevered steel formwork and the surface of the roller-compacted concrete dam. At the same time, the distance between the platform support leg 4 and the front side of the platform frame is greater than the distance between the hinge point and the vertical surface, so that the bottom front end of the platform frame can abut against the top of the roller-compacted concrete dam.

[0035] During the actual construction, the structural dimensions of the platform frame and the dimensions of the platform legs are designed in advance according to the specifications of the fog cannon, and are processed and formed. After the cantilevered steel formwork on the vertical face of the upstream of the dam is installed, a crane is used to lift the platform frame as a whole to the corresponding height. The two platform legs and the ears on the cantilevered steel formwork are installed in place, and the front bottom of the platform frame is against the top of the dam. At this time, it means that the overall installation of the platform is completed. Finally, the fog cannon is lifted into the platform and the work can begin.

[0036] This plan underwent relevant verification experiments. In this embodiment, the total length of the roller-compacted concrete dam is 1305m, the dam height is 68.2m, and the dam width varies from 55 to 8m. Except for the bottom 10m section which is a sloping surface with a ratio of 1:0.2, the upstream section of the dam is entirely vertical. The upstream formwork uses 3*3m cantilevered steel formwork. During the fabrication of the cantilevered steel formwork, two lifting lugs are pre-installed on the upper part of the main beam for easy hoisting. The two main beams are 1.8m apart, and the distance between the main beam truss at the back of the formwork and the formwork panel is 1.2m. During the dam surface pouring process, due to the project's location in the tropical coastal region of Fujian, with its long-term high temperatures in summer and the significant impact of the dam surface pouring, aggregate whitening frequently occurs during the roller-compacted concrete paving and compaction process. Therefore, it is necessary to use mist cannons for full-surface spraying and moisturizing coverage. However, considering that conventional spraying methods would severely affect the construction progress and quality of the surface, [further consideration is needed].

[0037] The fog cannon installation platform adopted in this embodiment is designed with dimensions of 1.8m*1.2m. The size module of the fog cannon matches the size of the main beam of the cantilevered steel formwork. The installation platform consists of a platform panel, surrounding guardrails, and platform legs.

[0038] During construction, the fog cannon installation platforms are fabricated in advance. Depending on the size of the pouring area and the coverage range of the fog cannons, installation platforms are set up every 50-60 meters. After the cantilevered steel formwork on the upstream vertical face of the dam is installed, a truck crane is used to hoist the installation platforms onto the steel formwork. First, the platform panels are adjusted so that the end of the platform rests on top of the vertical cantilevered steel formwork. Then, the left and right platform legs are attached to the lifting lugs of the main beam truss on the upstream vertical cantilevered steel formwork. M16 bolts are used to securely connect the holes on the flat steel of the left and right legs to the lifting lugs of the main beam truss on the upstream vertical cantilevered steel formwork. Finally, the fog cannons are hoisted into the installation platform. The fog cannons used are industrial fog cannons with a range of 60 meters, capable of spraying the entire pouring area.

[0039] After the roller-compacted concrete construction of this layer is completed, the fog cannon is first lifted out of the installation platform, and then the installation platform is lifted away by removing the fixing bolts. After that, the formwork is dismantled to end the roller-compacted concrete construction of this layer. When constructing the next layer of roller-compacted concrete, after the formwork of this layer is installed, the installation platform is first hoisted and fixed to the lifting lugs of the main beam truss behind the formwork, and then the fog cannon is hoisted in for operation. This cycle is repeated until the dam is poured.

[0040] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam, characterized in that: This includes cantilevered steel formwork, platform legs, platform uprights, platform tie rods, and platform panels; The cantilevered steel formwork is an essential steel formwork for the construction of roller-compacted concrete dams, and the top of the main beam truss of the cantilevered steel formwork is provided with ears. The bottom end of the platform leg is provided with a hinge hole corresponding to the ear, and the bottom end of the platform leg is hinged to the cantilever lifting steel template through the hinge hole and the ear. The platform uprights and platform tie rods are assembled and welded to form a platform frame that surrounds the top of the platform legs; The platform panel is installed at the lower end of the platform frame and is used to place the fog cannon.

2. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: The top of the platform leg is fixed to a position slightly behind the platform frame, so that the platform frame as a whole forms an eccentric structure relative to the platform leg.

3. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: The bottom end of the platform leg is a flat steel, and the ear on the back main beam truss of the cantilever lifting steel formwork is a matching round hole. The hinge hole and the round hole at the bottom end of the platform leg are hinged together by bolts, nuts and washers.

4. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: The length of the platform's outriggers is greater than the distance between the ears of the cantilevered steel formwork and the surface of the roller-compacted concrete dam.

5. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: The ear is provided in two parts with a spacing of more than 1.5m, and the distance between the ear and the vertical surface of the roller-compacted concrete dam is ≥1.2m.

6. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 5, characterized in that: The upper surface of the platform panel is provided with an anti-slip pattern.

7. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 6, characterized in that: The height of the platform upright is ≥1.2m, and the length of the platform tie rod is between 1.2m and 2m.

8. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 7, characterized in that: The platform has two legs, and the distance between the two platform legs is equal to the distance between the ears.

9. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: The platform panel is made of 4mm thick Q235B patterned steel plate.

10. The mist cannon mounting platform fixed on the straight formwork of a roller-compacted concrete dam according to claim 1, characterized in that: Both the platform uprights and platform tie rods are made of steel pipes.

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