An ecological slope protection structure and construction method for the prevention and control of expansive soil slope landslides

Abstract

The invention discloses an ecological slope protection structure and a construction method for the prevention and control of landslides on expansive soil slopes, comprising an anti-slip anti-seepage belt, a waterproof geomembrane, vetiver grass, slope protection turf and a drainage ditch; the anti-slip anti-seepage belt is arranged on the side The slope body is composed of cement mortar perforated and grouted at the stagnant water position or potential sliding surface in the slope, which is a continuous concave curved surface structure; the waterproof geomembrane covers the slope surface, slope top and slope foot, and the waterproof geomembrane is provided with holes. Vetiver is planted at the hole position, the upper surface of the waterproof geomembrane is covered with soil, and slope protection turf is planted on the soil; the drainage ditch is set at the foot of the slope. The anti-slip and anti-seepage belt formed by drilling and pouring cement mortar, the degradable waterproof geomembrane covered on the slope and the vetiver planted in the slope constitute a closed ecological water circulation system; using the transpiration of vetiver stems and leaves and the developed root system The water-retaining effect can control the water content of the slope within a certain range, and achieve the effect of controlling the landslide and collapse of the expansive soil slope of the expressway.

Description

technical field [0001] The invention belongs to the field of slope engineering, and in particular relates to an ecological slope protection structure and a construction method for preventing landslides of expansive soil slopes. Background technique [0002] Expansive soil slopes on expressways are shallow landslides, and the depth of the sliding surface is generally less than 4-5m. Expansive soil slopes have the problems of slipping every cutting, slipping while construction, and repeated slipping. At present, for the control technology of expansive soil slope landslides, common technologies include slope cutting and unloading technology, slope protection technology, and rigid retaining technology. Slope cutting and unloading technology increases slope cutting and spoil land occupation, causing soil erosion and environmental pollution, and landslides will still occur after grading to a smaller slope; slope protection technology can only prevent rainwater erosion, and cannot ...

AI Technical Summary

Problems solved by technology

Slope cutting and unloading technology increases slope cutting and spoil land occupation, causing soil erosion and environmental pollution, and landslides will still occur after grading to a smaller slope; slope protection technology can only prevent rainwater erosion, and cannot provide sufficient support It is easy to be damaged under the action of dry-wet cycle, and the amount of later maintenance work is large; the construction of rigid retaining technology is difficult, the construction period is long, and the cost is high, and the retaining soil is not allowed to deform, and the upper soil cannot be supported to slide

These slope protection technologies have a single structural form and poor mechanical stability, so it is impossible to flexibly select the appropriate ecological slope protection structure type according to local conditions and specific construction sites

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