A method and system suitable for preventing and controlling deep drainage of hydrodynamic pressure type reservoir landslides

Abstract

The invention belongs to the technical field of engineering geological landslide disaster prevention and control, and discloses a deep drainage prevention and control method and system suitable for ahydrodynamic pressure type reservoir landslide. A deep water collecting and draining well is arranged on a landslide body; when the difference between the water level of the water collecting well of the landslide body and the reservoir water level reaches a preset threshold value, a water pumping system is started to drain underground water, the difference between the water head inside the landslide and the water head outside the landslide is reduced, and therefore the purpose of improving the stability of the landslide is achieved; and the distributed water collecting well group is matched with drainage in a staged mode, so that the hydrodynamic pressure generated by the reduction of the reservoir water level in the landslide can be eliminated, and the purpose of landslide prevention andcontrol is achieved. The related structural device specifically comprises a water collecting system, a water level monitoring system, a water pumping and draining automatic control system, a water pumping system and a slope surface guide drainage system. The method has the characteristics of being targeted, convenient to construct, low in manufacturing cost and good in durability, and meanwhile, the problems that the landslide treatment difficulty of a large reservoir bank is large, the cost is high and the effect is poor can be solved.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of engineering geological landslide disasters, and in particular relates to a method and system suitable for preventing and controlling deep drainage of hydrodynamic pressure type reservoir landslides. Background technique [0002] Currently, the closest prior art: [0003] Due to the decline of the water level of the reservoir, the groundwater in the landslide body cannot be discharged from the slope body immediately in a short time, and hydrodynamic pressure will be generated in the slope body. For some reservoir bank landslides, their stability is controlled by the hydrodynamic pressure generated by the drop of reservoir water level, and such landslides are called hydrodynamic pressure landslides. Hydrodynamic pressure landslides are widely distributed and account for a large proportion of landslide disasters. They are characterized by the fact that landslides are extremely sens...

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Problems solved by technology

[0007] (1) The construction of drainage tunnels is difficult and costly. Due to the internal deformation of the landslide, the drainage tunnels are easy to crack and cannot form a continuous and complete underground water flow channel, and the drainage effect often fails after a period of time

[0008] (2) Other drainage measures such as siphon drainage, due to the siphon height limitation of the siphon mechanism, the drainage efficiency is low, the siphon pipe is easy to block, and there are easy air bubbles in the siphon pipe, resulting in the failure of the drain pipe

[0010] To solve the above problems, it is necessary to greatly improve the strength or deformation coordination ability of underground drainage connecting pipes. On the one hand, it will greatly increase the cost; , it is very difficult to ensure that the drainage tunnel will not be damaged due to landslide deformation

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