Gabion construction device for repairing apron scour pit of stilling pool of hydropower station

Abstract

The utility model belongs to the technical field of hydraulic structure repairing equipment, and particularly relates to a gabion construction device for repairing apron scour pits of a stilling pool of a hydropower station, which comprises an overwater hoisting platform and a grating cage supporting steel frame, hoisting equipment and feeding equipment are mounted on the overwater hoisting platform, the hoisting equipment is connected with the grating cage supporting steel frame, and the feeding equipment is connected with the grating cage supporting steel frame. According to the utility model, the construction efficiency and quality of the underwater gabion gabion are improved, the shape of stone dumping and filling of the apron bottom plate of the riverbed stilling pool is controlled, and the continuous stone dumping and filling operation can be realized; and the improvement of the construction application efficiency of the gabion gabion, the improvement of the construction quality and the promotion of the riverbed scouring pit defect treatment technology are facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic structure repair equipment, and in particular relates to a gabion construction device for repairing the stilling basin scour pit in a hydropower station. Background Technology

[0002] Since the hydraulic structures of the hydropower station began operation, scouring has gradually appeared on the stilling basin apron downstream of the station. The main reasons for this are the influence of factors such as the downstream riverbed geological conditions, changes in river flow conditions after the completion of the project, changes in downstream bedload replenishment conditions, and the impact of the project's operation and scheduling. These factors alter the energy dissipation conditions of the downstream riverbed, affecting the energy dissipation effect and causing localized scouring, resulting in pits and damage. Riverbed scouring significantly impacts the stability of the hydropower station's foundation. If left untreated, the defects will further develop, affecting the normal use of the hydraulic structures and potentially leading to instability and failure. To ensure the safe operation of the hydropower station, protective measures are needed to address the scouring defects.

[0003] Currently, protective measures for scour defects include pouring concrete and placing large stones. Pouring concrete provides good protection for the integrity and flatness of the riverbed, creating a relatively uniform surface. However, it is costly, and the small aggregate size and light weight of concrete result in relatively weak erosion resistance. Placing large stones in the downstream riverbed is more convenient, and the stones can be sourced locally, making it economical. However, stones are granular and prone to irregular separation during placement, requiring control over the uniformity of stone distribution. To control the flatness of the placed stones, gabion cages and reinforced gabions are used. Reinforced gabions are made by constructing cages with steel bars, filling them with stones, and then hoisting them as a whole. Gabion cages, on the other hand, are soft mesh cages that cannot be directly filled with stones. Once filled with stones, gabion cages will deform and cannot be hoisted using conventional methods.

[0004] This invention designs a gabion construction device for repairing scour craters in the stilling basin of a hydropower station, thus solving the above-mentioned problems. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gabion construction device for repairing scour craters in the stilling basin of a hydropower station includes a floating lifting platform and a gabion support steel frame. The floating lifting platform is equipped with lifting equipment and feeding equipment. The lifting equipment is connected to the gabion support steel frame, and one end of the feeding equipment faces the gabion support steel frame.

[0007] As a preferred option, the floating lifting platform includes a steel pontoon, the internal frame of which is made of steel profiles, and the outside of which is covered with sheet metal.

[0008] As a preferred embodiment, the lifting equipment includes a gantry boom and a winch installed on a floating lifting platform. A wire rope is wound on the winch, and the head of the wire rope passes through the top of the gantry boom and is equipped with a lifting hook. A lifting rope connected to the grid cage support steel frame is attached to the lifting hook.

[0009] As a preferred embodiment, the feeding equipment includes a feeding hopper, a hand-operated hoist installed on a floating platform, the upper end of the feeding hopper being connected to the hand-operated hoist, and the lower end of the feeding hopper being provided with a guide tube leading to the steel frame supporting the grid cage.

[0010] As a preferred option, the grid cage support steel frame is composed of a hexahedral support frame formed by splicing several steel sections. Steel plates are installed on the sides of the support frame, and the upper and lower ends of the support frame have openings. The inside of the support frame can accommodate the grid cage.

[0011] As a preferred option, the grating cage can be secured to the support frame using cable ties.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] 1. This utility model improves the construction efficiency and quality of underwater gabion cages, controls the shape of the stones used for filling the bottom plate of the stilling basin, and enables continuous stone filling operations. It plays a promoting role in improving the construction efficiency of gabion cages, improving construction quality, and promoting the technology for treating riverbed scour defects.

[0014] 2. The steel frame supporting the gabion cage of this utility model can be hoisted as a whole to control the shape of the stones thrown into the gabion cage, ensuring that the stones are evenly distributed and forming a regular protective structure.

[0015] 3. The gabion stones filled using this construction device have both inherent flexibility and can form a relatively flat surface, which is beneficial to improving the scour resistance of the downstream riverbed.

[0016] 4. The feeding hopper of this utility model, in conjunction with a hand-operated hoist, raises the height of the feeding hopper while throwing stones into the grid cage, so that the stones in the grid cage rise at a uniform speed and are filled evenly, effectively improving the filling quality of the stones in the cage.

[0017] 5. The gabion is temporarily tied and fixed to the gabion support steel frame on the shore. After the gabion is fed, only the temporary binding straps need to be removed to lift the gabion support steel frame, which reduces underwater construction time, improves construction efficiency, and the gabion support steel frame can be reused to reduce construction costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2This is a schematic diagram of the present invention.

[0020] The following are the labels in the diagram: 1. Waterborne lifting platform; 2. Steel frame supporting the grating cage; 3. Lifting equipment; 4. Feeding equipment; 5. Steel pontoon; 6. Gantry boom; 7. Winch; 8. Wire rope; 9. Lifting hook; 10. Lifting rope; 11. Feeding hopper; 12. Hand chain hoist; 13. Conduit; 14. Support frame. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following embodiments or drawings are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] A gabion construction device for repairing scour craters in the stilling basin of a hydropower station, such as Figure 1 and Figure 2 As shown, it includes a floating lifting platform 1 and a grid cage support steel frame 2. The floating lifting platform 1 is equipped with lifting equipment 3 and feeding equipment 4. The lifting equipment 3 is connected to the grid cage support steel frame 2, and one end of the feeding equipment 4 faces the grid cage support steel frame 2.

[0023] The steel frame supporting the gabion cage can be hoisted as a whole to control the shape of the stones thrown into the gabion cage, ensuring that the stones are evenly distributed and forming a regular protective structure. The filled gabion cage has both inherent flexibility and can form a relatively flat surface, which is beneficial to improving the scour resistance of the downstream riverbed.

[0024] like Figure 1 As shown, the floating platform 1 includes a steel pontoon 5, the internal frame of which is made of steel profiles, and the exterior of which is covered with sheet metal.

[0025] like Figure 1 As shown, the lifting equipment 3 includes a gantry boom 6 and a winch 7 installed on the water lifting platform 1. A wire rope 8 is wound on the winch 7. The head of the wire rope 8 passes through the top of the gantry boom 6 and is equipped with a lifting hook 9. A lifting rope 10 connected to the grid cage support steel frame 2 is attached to the lifting hook 9.

[0026] like Figure 1 As shown, the feeding device 4 includes a feeding hopper 11, a hand-operated hoist 12 is installed on the water lifting platform 1, the upper end of the feeding hopper 11 is connected to the hand-operated hoist 12, and the lower end of the feeding hopper 11 is provided with a guide tube 13 facing the grid cage support steel frame 2. The excavator transports stones into the feeding hopper 11.

[0027] like Figure 2As shown, the grid cage support steel frame 2 is composed of a hexahedral support frame 14 formed by splicing several steel sections. Steel plates are installed on the sides of the support frame 14. The support frame 14 has openings at the top and bottom ends. The support frame 14 can accommodate the grid cage. The grid cage can be fixed inside the support frame 14 by cable ties.

[0028] The construction steps of this utility model include the following steps:

[0029] S1: Assembled water lifting platform 1; The water lifting platform 1 is assembled from multiple 10*3*1.5m steel pontoons 5. The platform is equipped with a grid cage supporting steel frame 2, lifting equipment 3, feeding equipment 4, excavator and anchoring system;

[0030] S2: Dropping Route and Measurement Positioning; Because geogrid gabions require close contact between cages and staggered joints between layers, the positioning of the gabion placement platform is crucial. The size and number of gabions in each group are determined based on site conditions, consisting of several 2*2*1m geogrid gabions. Using the guide walls on both banks as baselines, gabions are dropped from downstream to upstream. Marks are made every 2 meters in the downstream riverbed treatment area. Using the guide wall on the right as the baseline for upstream and downstream, gabion placement begins on the right side, using the guide wall as support, and proceeds sequentially from downstream to upstream. During placement, divers perform precise underwater positioning to ensure that the placed gabions are close to adjacent already placed gabions.

[0031] S3: Fabrication of the grid cage support steel frame 2; Multiple support frames 14 are fabricated using structural steel and steel plates, and the support frames 14 are assembled into a complete grid cage support steel frame 2 according to the size of the throwing area.

[0032] S4: Gabion fabrication; the dimensions of a single gabion are (1.5~2m)*(1.5*2m)*1m. Multiple gabions are used to form a gabion group, the size of which is determined according to the throwing range. The gabions are fabricated on-site using gabion mesh. The seams of the gabions are sewn together with rope, with a knot sewn every 2-3 holes. The top cover of the gabion is not placed temporarily; it will be sealed underwater by divers after the stones are thrown. The fabricated gabions are fixed to the support frame 14, and the top of the gabion is tied to the horizontal bar at the opening of the support frame 14 with cable ties.

[0033] S5: Deploying the grating cage; Secure the grating cage to the grating cage support frame 2 on the floating lifting platform 1. Move the floating lifting platform 1 to the cage deployment area. Divers work underwater to precisely position the cage, and use the gantry crane 6 to slowly lower it onto the riverbed. If there is a deviation in position, adjust the position. The first grating cage is placed close to the original guide wall. Using the first set of grating cages as a reference, lower them sequentially from downstream to upstream, ensuring they are tightly packed together.

[0034] S6: Feeding material into the grid cage; After the grid cage is placed in place, the diver will assist in placing the guide pipe 13 for feeding. The excavator digs pebbles and feeds them through the feeding hopper 11. The diver observes underwater whether the stone fills the grid cage and assists in filling and leveling the gabion. After the gabion is full, the diver will seal the gabion and move it to the next grid cage for feeding. After all the gabions in the group are full, the tie straps at the top of the grid cage are removed and the grid cage support steel frame 2 is lifted.

[0035] S7: Move to the next feeding face and repeat S4~S6 until all gabion loading is completed.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A gabion construction device for repairing scour craters in the stilling basin of a hydropower station, characterized in that: It includes a water-based lifting platform (1) and a grid cage support steel frame (2). The water-based lifting platform (1) is equipped with lifting equipment (3) and feeding equipment (4). The lifting equipment (3) is connected to the grid cage support steel frame (2), and one end of the feeding equipment (4) faces the grid cage support steel frame (2). The grid cage support steel frame (2) is composed of a hexahedral support frame (14) formed by splicing several steel sections. The support frame (14) has steel plates installed on its sides and openings at both the top and bottom. The support frame (14) can accommodate the grid cage inside. The grid cage is fixed inside the support frame (14) by cable ties.

2. The gabion construction device for repairing scour craters in the stilling basin of a hydropower station according to claim 1, characterized in that: The floating platform (1) includes a steel pontoon (5), the internal frame of which is made of steel profiles, and the outside of which is covered with sheet metal.

3. The gabion construction device for repairing scour craters in the stilling basin of a hydropower station according to claim 1, characterized in that: The lifting equipment (3) includes a gantry crane (6) and a winch (7) installed on the water lifting platform (1). A wire rope (8) is wound on the winch (7). The head of the wire rope (8) passes through the top of the gantry crane (6) and is equipped with a lifting hook (9). A lifting rope (10) connected to the grid cage support steel frame (2) is attached to the lifting hook (9).

4. A gabion construction device for repairing scour craters in the stilling basin of a hydropower station according to claim 1, characterized in that: The feeding device (4) includes a feeding hopper (11), a hand-operated hoist (12) is installed on the water lifting platform (1), the upper end of the feeding hopper (11) is connected to the hand-operated hoist (12), and the lower end of the feeding hopper (11) is provided with a guide tube (13) facing the grid cage support steel frame (2).

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