Combined drainage and seepage system suitable for weak seepage soil layer slope drainage

Abstract

The invention discloses a combined drainage system suitable for drainage of a weakly permeable soil layer slope, which is formed by combining a three-dimensional drainage system, a vacuum drainage assisting system and a siphon / direct drainage system, the three-dimensional drainage system comprises a horizontal drainage floral tube (8), a vertical drainage floral tube (17) and a water collecting well (5), and the vacuum drainage assisting system comprises a vacuum pump (11) and a vacuum exhaust tube (10). The siphon / direct drainage system comprises a self-flow direct drainage mode and a siphon drainage mode, the direct drainage system comprises a water guide hole and a direct drainage pipe (21), the siphon drainage system comprises a deep-well pump (12), a siphon (15) and a siphon water supplementing pipe (13), the deep-well pump (12) is installed at the bottom of the water collecting well (5), and the water inlet end of the siphon (15) extends into the lower portion of the water collecting well (5) along the inner wall of the water collecting well (5). The method can effectively realize smooth and concentrated drainage of weak-permeability soil layer slope underground water, prevents slope surface soil layer saturation and erosion damage, and improves the lasting stability of the slope.

Description

technical field [0001] The invention belongs to the technical field of soil slope treatment, and in particular relates to a soil slope groundwater drainage system, which is suitable for various soil slope groundwater treatment, and can be used in soil slope drainage projects in open-pit mines, construction, water conservancy, transportation and other industries. Popularized and applied, it is especially suitable for groundwater drainage of weakly permeable soil slopes. Background technique [0002] Water in the soil layer can reduce the shear strength of the soil, which is one of the main factors for the failure of the soil slope. important means. During the excavation of the soil slope, the stress is released, the slope displacement occurs, and the soil becomes relatively loose. If the groundwater is abundant, the slope will be in a saturated state. If the potential slip surface of the slope is in the saturated soil layer, the slope will lose stable, landslides occur, ser...

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Problems solved by technology

[0005] The purpose of the present invention is mainly to provide a drainage system with simple construction technology, compact structure and high drainage efficiency in view of the existing problems in the prior art, such as complex structure, large engineering quantity, high cost, or unsuitability for drainage of weakly permeable soil slopes. , long life, stable and firm, easy to use, can effectively realize the smooth discharge of groundwater in weakly permeable soil layers, prevent water stagnation in soil layers, and increase the lasting stability of weakly permeable soil slopes. Seepage system, which can realize the natural seepage and collection of weakly permeable soil layer of the slope

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