Ecological slope protection structure for preventing and controlling expansive soil slope sloughing and construction method

Abstract

The invention discloses an ecological slope protection structure for preventing and controlling expansive soil slope sloughing and a construction method. The ecological slope protection structure comprises an anti-slip anti-seepage zone, a waterproof geomembrane, vetiver grass, slope protection turf and a drainage ditch; the anti-slip anti-seepage zone is arranged in a slope body of a slope, is formed by drilling and grouting cement mortar at the position of stagnant water in a slope or a potential slip surface, and is of a continuous concave curved surface structure; the waterproof geomembrane covers a slope surface, a slope top and a slope toe, and the waterproof geomembrane is provided with holes, the vetiver grass is planted in the hole positions, the upper surface of the waterproof geomembrane is covered with soil, and the slope protection turf is planted in the soil; and the drainage ditch is arranged at the slope toe of the slope. Through the anti-slip anti-seepage zone formed by drilling and grouting the cement mortar, the degradable waterproof geomembrane covered by the slope surface and the vetiver grass planted in the slope body constitute a closed ecological water circulation system; and by using the vetiver grass stem and leaf transpiration and the developed root system water retention function, the water content of the slope is controlled within a certain range, and the effect of controlling slope sloughing of expansive soil of an expressway is achieved.

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

Images