Bioengineering protection mechanism of city rock
slope and its laboratory test
Bioengineering protection mechanism of city rock
slope and its laboratory test
Desong JIANG1,Minghua ZHAO1,Chong JIANG2,
1.College of Civil Engineering,
Hunan University, Changsha 410082, China; 2.School of Resources
and Safety Engineering, Central South University, Changsha 410083,
China;
Abstract：Based on the features of rock slope bioengineering protection, the ecology protection mechanism of the urban rock slope was discussed with the mechanics effect of plants and rock slope, and the reinforcement action mechanism of rock slope by plant root system was analyzed as well. Then, the corresponding mechanical model was proposed, from which the formula to calculate the increased shearing strength of the root system-earth compound body was derived. Moreover, the side slope rainfall interception, the runoff lagging, the soil antiseepage, and the soil layer consolidating effect were studied, respectively. Furthermore, the indoor model experiment of urban crag rock slope ecology protection was designed and completed, in which various grasses to plant in slope with different angles, solid earth forms, and the different strengthening earth mechanism were studied. Finally, the present method was applied in an engineering project, from which the antiwashing behavior of three kind of grasses (i.e., the Bahiagrass, the tall fescue, and the Bermudagrass) planted in the slope with an angle of 38°, 48°, and 58°, respectively, and different strengthening structures (i.e., the diamond wire netting, the geocell and the three-dimensional network) were obtained. The application results also show that the effect of geocell structure is the best one followed by the three-dimensional net and the diamond wire net. The antiwashing capability per unit area has a critical slope angle of about 25°. The reinforcing effect of Bermudagrass is better than the Bahiagrass and tall fescue.
出版日期: 2009-12-05
引用本文:
. Bioengineering protection mechanism of city rock
slope and its laboratory test[J]. Front. Struct. Civ. Eng., 2009, 3(4): 414-421.
Desong JIANG, Minghua ZHAO, Chong JIANG, . Bioengineering protection mechanism of city rock
slope and its laboratory test. Front. Struct. Civ. Eng., 2009, 3(4): 414-421.
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