Statistical Analysis of the Limit State Loess Slope in Tianshui Area of Gansu
详细信息
- 责任者：Li Tonglu (School of Geological Engineering and Surveying ; Chang’an University ; Xi’an 710054 ; China) ; Liu Chao
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2013
- 卷期：35(2)
- 关键词：边坡稳定性 ; slope stability ; 甘肃 ; Gansu Province
- 页码：p.107-114
- 图表：illus., 1 table, 41 refs.
- 分类号：1702
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
For the practical slope design,the angle of adjacent natural slope is often used as reference to design a cutting engineering slope,which is called as engineering analogical method.Based on the method,the profiles of 51loess limit state slopes with the height of 40-150m were surveyed in Tianshui area of Gansu,and the height,width and angle of the slopes were measured;the relationship between height and width of slope was double logarithmic linear,and the correlation equation was built;and then,the slope height was divided at intervals of 10m,and three heights of limit state slopes for each interval were collected to calculate the strength parameters of cohesion and internal friction angle with Morgenstern-Price method.The inversion results showed that synthetically cohesion of loess increased,and internal friction angle decreased with the height of slope increasing,which was in accordance with the relationship between the strength parameters of loess and depth.Based on the inversive strength parameters and the regression equation of the height and width of limit state slope,the relationship curves between the height and width of slope were calculated with different stability coefficients,and the curves were drawn as a chart,which was used to determine the stability coefficient of a known slope andto confirm the angle of designed cutting slope.
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