Auxiliary device for side slope drainage with open-type dam

Abstract

In drainage for coast and reservoir bank slopes by using a siphon drainage method, there exists a defect of difficult self-restoring of siphonic action because of reduction in vacuum degree in a siphon after the siphonic action pauses due to groundwater recession. The present invention provides a drainage device capable of activating siphonic action in real time. The device is composed of an open-type dam, an air chamber, a siphon, an exhaust pipe, an air replenishing pipe, and a one-way valve. The air chamber is disposed at the crest of the open-type dam; one end of the siphon extends below the phreatic line of a slope, and the other end of the siphon extends through the air chamber and below the seawater level; one end of the exhaust pipe extends below the phreatic line of the rear edge of the slope, and the other end of the exhaust pipe is connected to the air chamber; and the air replenishing pipe is disposed at the upper end of the air chamber. The device provides power for the siphonic action with guarantee for self-restoring of the siphonic action. Moreover, the device employs a pile foundation with low consumption of materials and low construction costs in the face of great depth of water before a slope, and thus is applicable to not only coast slopes but also reservoir bank slopes with extra-deep water levels.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, in particular to a device for draining water from coasts and bank slopes. Background technique [0002] my country has a vast territory, complex geological topography, and frequent geological disasters, among which landslide disasters pose a huge threat to human production and life. The occurrence of most landslide hazards is related to the change of groundwater level. The rise of the groundwater level leads to an increase in the bulk density of the landslide, a decrease in the effective stress of the sliding surface, and a decrease in the shear strength, which in turn leads to the instability of the landslide. For reservoir bank slopes, when the water level in front of the slope drops rapidly, the groundwater inside the slope seeps out of the slope, generating seepage force, increasing the sliding force, and causing the landslide to become unstable. Therefore, draining the groundwater i...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defect that the siphon drainage method in the prior art is used to drain the coast and reservoir bank slope, after the siphon effect is

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