Lifting and lowering drainage device at the bottom of open channel to prevent damage caused by uplift pressure

Abstract

The invention provides an up-and-down drainage device at the bottom of an open channel for deep excavation and protection against damage caused by uplift pressure. Affect the obvious advantages such as the water passing capacity of the open channel. It includes a water collecting tank, a lifting mechanism and a guiding mechanism; the inside of the water collecting tank is a hollow structure, and there are many small holes on the lower half of the side and the bottom, and a layer of first filter screen is wrapped outside the part of the water collecting tank with small holes; the lifting The mechanism includes a top cover, a cylinder and a floating plate arranged in sequence from top to bottom. There are multiple drainage holes on the upper part of the cylinder, and a layer of second filter screen is contained between the cylinder and the floating plate; the guiding mechanism includes guide rails, sleeves And the fixed bracket, the guide rail is located at the center of the inner side of the water collection tank, one end is set at the bottom of the water collection tank, the other end extends to the top cover, the casing is fixed on the inner wall of the lifting mechanism through the fixed bracket, and the fixed brackets are respectively located at the top cover and the second filter screen , the casing can move up and down along the guide rail with the lifting mechanism.

Description

technical field [0001] The invention relates to an up-and-down drainage device for the bottom of an open channel to prevent damage from uplift pressure in the deep excavation section. During the process of water delivery in the open channel, the channel is lined with an anti-seepage slope and the bottom of the channel to prevent damage from the uplift pressure of groundwater, which belongs to the process of water delivery in the open channel. Anti-clogging and pressure-reducing drainage technical field. Background technique [0002] The distribution of water resources in various parts of China is uneven. In order to solve the contradiction between supply and demand of water resources, the country has built water diversion projects. Among them, channel lining water delivery is widely used because of its low cost and good water delivery effect. However, for some high-lying places, deep excavation of square sections is often used to ensure the self-flow of canal water, and deep...

AI Technical Summary

Problems solved by technology

However, the above-mentioned two technologies have too small displacement, high performance requirements for the check valve, cannot effectively discharge the groundwater when the groundwater level suddenly rises, and cannot effectively reduce the damage to the channel lining caused by the uplift pressure. The key problem is the reverse The check valve is prone to silt at the bottom of the channel or at the foot of the slope, and the check valve cannot be opened when the groundwater needs to be discharged, resulting in damage to the anti-seepage lining of the slope or the bottom of the channel

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