Dendritic embedded type flexible ecological slope drainage ditch and construction method

Abstract

The invention discloses a dendritic embedded type flexible ecological slope drainage ditch and a construction method. The dendritic embedded type flexible ecological slope drainage ditch comprises permeable geotextile, an anti-seepage geomembrane, an anti-seepage clay layer, a sandy soil layer, a medium-coarse sand layer, a gravel layer, a small-particle-size gravel layer, a front water collectingand guiding ditch body, ditch top vegetation and a converging opening plugging structure. Drainage ditches serve as water collecting, intercepting and draining branch ditches and are arranged on twosides of a slope longitudinal main drainage ditch in a branch shape. The construction method comprises the following steps: designing a dendritic arrangement scheme on a slope; digging the drainage ditch; sequentially laying the permeable geotextile, the anti-seepage clay layer and the anti-seepage geomembrane; sequentially filling the in-ditch gravel layer, the medium-coarse sand layer, the sandysoil layer and the small-particle-size gravel layer in the front water collecting and guiding ditch body; and planting the ditch top vegetation. The technical bottlenecks that conventional intercepting and drainage ditches are prone to cracking and damage, poor in durability, poor in ecological property and the like are solved, and the drainage ditch has the advantages of being good in slope deformation coordination, low in material cost, high in intercepting and drainage capacity, environmentally friendly, ecological and the like, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of geological disaster prevention and control, in particular to a dendritic embedded flexible ecological slope drainage ditch and a construction method. Background technique [0002] Landslides are the most common geological disasters, causing huge losses or threats to major infrastructure and people's lives and properties. Water is the most important external factor causing landslides, so good slope / side slope drainage is the foundation of landslide prevention and control. Existing slope drainage measures are mainly divided into slope drainage and underground drainage, of which slope drainage is mainly realized by building slope surface cuts, drainage ditches and other structures. Existing cut-offs and drainage channels are usually masonry rubble or concrete structures. Since such structures are rigid structures, they do not have the ability to coordinate deformation with the slope. Once the slope is deformed, crack...

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Problems solved by technology

Existing cut-offs and drainage channels are usually masonry rubble or concrete structures. Since such structures are rigid structures, they do not have the ability to coordinate deformation with the slope. Once the slope is deformed, cracks or damage are likely to occur. The drainage capacity of the slope surface of the ditch is lost, and the runoff on the surface of the slope will directly infiltrate into the interior of the slope, which will increase the groundwater level inside the slope, increase the pore water pressure, soften the soil, and reduce the shear strength of the soil, eventually leading to The safety factor of the slope is reduced, which increases the risk of landslides and even induces landslide disasters; secondly, for some high and steep slopes or landslides with complex terrain conditions, it is difficult to transport mortar rubble or concrete, and the construction is difficult and the construction cost is high. In addition, when the cut-off and drainage ditches are located in severe cold regions, the masonry rubble and concrete are easy to shrink and crack under low temperature conditions, and the durability is more difficult to guarantee; finally, the extensive use of masonry rubble and concrete will inevitably damage The original greening of the slope affects the appearance and does not conform to the green ecological development concept advocated by the state

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