High-steep bare rock slope surface vegetation greening system and construction method thereof

Abstract

The invention discloses a high-steep bare rock slope surface vegetation greening system and a construction method thereof. The system comprises a roughening layer, a transition combination layer, an artificial soil layer, a plant seed layer and a protection layer which are sequentially arranged from bottom to top. By close attachment and combination of the toughening layer, the transition combination layer, the artificial soil layer and the protection layer, a complete vegetation greening system is formed, supply of water and nutrients of a nutrient layer and a plant growth layer suitable fordevelopment of plant root systems is established, so that rock surfaces are firm, the life of the high-steep bare rock slope surface vegetation greening system is prolonged, after several years, plantroot systems are firmly and densely anchored in all layers, and dual functions of greening and slope protection are realized; the problem about the life of the vegetation greening system is solved, rare rock surfaces and artificial soil are combined into a whole by pervious concrete intermediates, slipping of the artificial soil layer from the vegetation greening layer is prevented, and the service life of the vegetation greening system is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of environmental management of high and steep bare rock slopes, in particular to a greening system and a construction method for high and steep bare rock slopes. Background technique [0002] At present, a large number of abandoned open-pit quarries, roads and railways that cut and dig mountains form a large number of steep rock slopes or rock walls with a slope of 40°-70° of exposed rock, and the natural conditions are very harsh. Cutting and digging the mountain makes the stability of the slope weak; the topsoil and nutrients needed for vegetation growth are seriously lacking, and the rocky slope does not have the soil environment necessary for vegetation growth. The external force erosion on the slope surface is mainly runoff erosion. Greening is very difficult. At the same time, the stability of the slope is drastically reduced, and natural disasters such as falling blocks and debris flows are prone to occur, whi...

AI Technical Summary

Problems solved by technology

The disadvantage is that the construction period is long and the cost is high

Especially on extremely steep slopes, the construction is more difficult

The three-dimensional vegetation net is only suitable for slopes with gentle slopes. After the thermoplastic resin net is aged, it is easy to form secondary pollution in the soil

[0016] 1. Due to the effect of gravity, if the green layer of high and steep bare rock slopes cannot be firmly combined with the rock wall, it is prone to slipping and collapse

[0017] 2. Due to the steepness of the rock wall, the rainfall has a strong erosion on the slope surface, and the soil erosion is serious

Excessive use of water-retaining agent will cause soil compaction and reduce soil infiltration performance

However, the superabsorbent resin (soil water-retaining agent) added to the artificial soil shrinks and expands repeatedly after repeated dehydration and water absorption, often causing the planting concrete or artificial soil to crack and disintegrate.

At the same time, the water-retaining agent will generally decay significantly within 2 years, which will restrict the service life of the vegetation system.

[0020] 5. During the period of 10-20 days from spraying the artificial soil to the slope to the vegetation forming a turf, there is almost no vegetation protection on the slope, and there is no protective effect such as canopy buffer and root anchorage of the vegetation layer.

Although there were certain artificial protection measures in the past, serious slope runoff erosion still occurred during the rainfall or even routine maintenance during the flattening period, resulting in a large loss of soil matrix in the artificial soil layer with a thickness of only 5-10 cm, which seriously affected the later vegetation recovery.

Post-maintenance costs are too high

[0021] 6. Some open-pit quarries, high and steep rock slopes on both sides of roads and railways generally do not have the soil environment necessary for vegetation growth, and the rock slopes formed by engineering construction have relatively large slopes, generally at 40° above, even forming an upright

[0023] The high-cost greening technology is difficult to use and promote on high and steep bare rock slopes, so how to reduce the cost of ecological restoration of mine rock slopes is a problem that needs to be solved urgently

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