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Help CenterElectric Hydraulic Gates and Hydraulically Self-controlled Flap Gates Can be Customized According to Requirements
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Technical Status of Upward-Flipping Flap Gates:
In the past, due to the small usage volume of hydraulic self-controlled flap gates, no market scale was formed, so there was no real industry. After years of development, especially the extensive use of small and medium-sized power stations in the past decade, great progress has been made in the technology of hydraulic self-controlled flap gates, and the research on them has become more detailed and in-depth.
1. The accuracy of the gate startup water level has been significantly improved. It can start when the water level is 0 - 15 cm above the gate top and can be appropriately adjusted according to user requirements. An accurate and relatively low startup water level can reduce the inundation area upstream.
2. The operation of the gate is more stable. Compared with the multi-hinge rod slider type and slider support structure previously used, the roller, guide plate, and connecting rod structure currently adopted makes the gate less likely to shake after startup, and the gate can maintain a consistent operating state.
3. After years of technical improvements, the counterweight of the gate is more reasonable. It will not produce slapping in the fully open state due to excessive bottom counterweight, nor will the gate fail to close normally after being fully opened due to insufficient bottom counterweight.
Introduction to the Cofferdam Filling Steps during the Construction of Flap Gates:
Flap dams are very common mechanical equipment in water conservancy and hydropower projects. In many cases, some companies and groups choose to use flap dams to increase the safety of water conservancy and hydropower. There are many things to pay attention to during the construction and installation of flap dams. The entire project is very important. This time, let's talk about the cofferdam filling steps for the construction of flap dams.
(1) The advancing method is used for filling. Two 1m3 excavators are used to take soil, and two 120 bulldozers are used for leveling and rolling. According to the construction conditions and construction period arrangement requirements at the construction site, the one-side advancing method or the two-side simultaneous advancing method is used for filling.
(2) After the cofferdam is filled above the water surface, the soil is filled in layers with a thickness controlled at 30 cm. The particle size of the soil material should not be greater than 5 cm. The upper layer of soil material can be paved only after the compaction test of each layer is passed.
(3) The soil material for cofferdam filling is the earthwork excavated from the Dadi at Taipingyue Gate. The water content of the soil material is controlled within the appropriate range to ensure that the soil source is not soaked by rainwater or groundwater.
(4) The earthwork is compacted by bulldozers, and the compaction degree of the compacted earthwork reaches over 0.92.
(5) After filling to the top of the cofferdam, it is hardened with clay-bound gravel or building slag from the platform.
Cofferdam Removal
The cofferdam will be removed before the end of the project. It is planned to remove all the cofferdams within 5 days. The above-water part of the removed earthwork is used for backfilling in the backfill area, and the underwater part is discarded at the spoil site or the location designated by the owner.
During the construction of flap dams, great attention is paid to cofferdam filling, and there are many things to pay attention to during implementation. There are also many ways to design water conservancy and hydropower projects. For example, flap gates, flap doors, flap dams, hydraulic lifting dams, etc. Each is a very good building material.
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