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| Research on the Compound Structure for the Protection and Greening of Steep Rock Slope |
| YUEPeng - fei |
| (The Third Railway Survey and Design Institute Group Corporation, Tianjin 300142, China) |
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Abstract Abstract ： Research purposes ： The protection and greening of hard steep slope has always been a difficult problem in engineering field. Based on the research of the protection and the greening of steep slope in Shenyun car depot of Metro Line 7 in Shenzhen, a complex structure to reinforce the steep rock slope is proposed. Use anchor bolts, grouting measures to reinforce the jointed surfaces and cracks of the slope, improve the global stability of the slope; use the vegetation bags and active protection nets to stabilize spraying combined materials and fragmented rock, improve the local stability of the slope, to weaken the water erosion on slope surface, to slow the weathering velocity of the rock slope surface and green slope. Research conclusions:( 1 ) The deep stability of hard rock slope is mainly controlled by the joints and fracture development degree in the internal structure, and the stability of the rock slope is better with the combination of systematic bolt and random anchor. (2) The vegetation bags can be fixed by a certain distance in the rock slope, so the friction coefficient of the rock slope can be improved, and the mixed substrate can be adhered to the rock slope. (3 ) The vegetation bags are used of the ordinary geotextile and internal filling with planting soil , when the spray mixture is stable on the slope surface and the grass will grow , the soil in the vegetation bags are exposed after the degradation of the geotextile, which can be used as a supplement to the slope soil. (4) The composite structure of the steep slope protection and greening in Shenzhen metro project has been a very good application , which can provide reference to the future railway , metro , highway and construction engineering of the rock slope protection and greening.
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Received: 09 October 2015
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2015, Vol. 32 
