Analyses on finite earth pressure and slope safety factors

JIE Yuxin

doi:10.16511/j.cnki.qhdxxb.2019.22.018

PDF(1483 KB)

Journal of Tsinghua University(Science and Technology) ›› 2019, Vol. 59 ›› Issue (8) : 619-627. DOI: 10.16511/j.cnki.qhdxxb.2019.22.018

HYDRAULIC ENGINEERING

Analyses on finite earth pressure and slope safety factors

{{article.zuoZhe_EN}}

Author information +

History +

Abstract

This paper analyzes recent geotechnical engineering studies such as the finite earth pressures, slope safety factors and critical slip surfaces. However, current methods for calculating the finite earth pressure are not appropriate since they predict that the earth pressure decreases to zero as the soil mass width decreases, which violates the soil mechanics laws. The Rankine earth pressure theory can still be used to calculate the finite earth pressure. The slope safety factor is defined according to the strength reserve with no need to distinguish between the "anti-sliding force" and the "sliding force". The shear strength definition shows that the soil shear strength should be used to calculate the safety factor for a given soil slope slip surface. However, a slope cannot necessarily be adjusted to develop its "maximum anti-sliding ability". Furthermore, the critical slip surface corresponding to the minimum safety factor may not be the first surface to slide. Thus, this investigation helps discriminate the key concepts for understanding geotechnical mechanics.

Key words

finite soil mass / earth pressure / slope safety factor / slip surface

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

JIE Yuxin. Analyses on finite earth pressure and slope safety factors[J]. Journal of Tsinghua University(Science and Technology). 2019, 59(8): 619-627 https://doi.org/10.16511/j.cnki.qhdxxb.2019.22.018

References

[1] 高印立. 有限土体土压力的计算探讨[J]. 建筑科学, 2000, 16(5):53-56. GAO Y L. The calculation of finite earth pressure[J]. Building Science, 2000, 16(5):53-56. (in Chinese)
[2] 宁源, 马石城. 有限黏性土体主动土压力计算分析[J]. 建筑结构, 2017, 47(S1):1161-1165. NING Y, MA S C. Calclulation of active earth pressure for limited cohesive soil[J]. Building Structure, 2017, 47(S1):1161-1165. (in Chinese)
[3] 戴夏斌. 墙后有限宽度无粘性土主动土压力试验及数值模拟[D]. 长沙:湖南大学, 2016. DAI X B. Experimental study of active earth pressure of cohesionless soil with limited width behind the retaining wall and numerical simulation[D]. Changsha:Hunan University, 2016. (in Chinese)
[4] 马继才. 有限土体土压力理论在兰州地铁1号线工程中的应用研究[J]. 铁道标准设计, 2015, 59(9):98-103. MA J C. Application study on the theory of earth pressure for limited soil in Lanzhou Metro Line 1[J]. Railway Standard Design, 2015, 59(9):98-103. (in Chinese)
[5] 廖俊展, 苗峰. 基于上限分析法的有限宽度土体土压力计算[J]. 地下空间与工程学报, 2016, 12(S2):577-581. LIAO J Z, MIAO F. Computation of earth pressure for limited width soil by upper limit method[J]. Chinese Journal of Underground Space and Engineering, 2016, 12(S2):577-581. (in Chinese)
[6] 费彩会, 朱建明, 林庆涛. 临近地下室外墙的挡土墙主动土压力研究[J]. 地下空间与工程学报, 2017, 13(4):1009-1015. FEI C H, ZHU J M, LIN Q T. Research on active earth pressure behind retaining wall adjacent to basements exterior wall[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(4):1009-1015. (in Chinese)
[7] 王磊. 有限土体土压力理论在异型深基坑工程中的应用研究[J]. 铁道标准设计, 2017, 61(5):119-125. WANG L. Application study of the theory of limited soil earth pressure in deep foundation pit of special shape[J]. Railway Standard Design, 2017, 61(5):119-125. (in Chinese)
[8] 张怀文, 吉晓朋, 车东. 临近建筑物有限宽度土体深基坑支护设计与施工[J]. 岩土工程技术, 2008, 22(6):312-315, 323. ZHANG H W, JI X P, CHE D. Design and construction of retaining structures for deep foundation pit to protect limited width soil[J]. Geotechnical Engineering Technique, 2008, 22(6):312-315, 323. (in Chinese)
[9] 岳树桥, 左人宇, 陆钊. 相邻基坑有限宽度土条主动土压力的计算[J]. 岩土力学, 2016, 37(7):2063-2069. YUE S Q, ZUO R Y, LU Z. A method for calculating active earth pressure of soil piece with a finite width between adjacent foundation pits[J]. Rock and Soil Mechanics, 2016, 37(7):2063-2069. (in Chinese)
[10] 陈仲颐, 周景星, 王洪瑾. 土力学[M]. 北京:清华大学出版社, 1994. CHEN Z Y, ZHOU J X, WANG H J. Soil mechanics[M]. Beijing:Tsinghua University Press, 1994. (in Chinese)
[11] 刘定华, 郝际平. 钢筋混凝土筒仓仓壁侧压力的研究[J]. 建筑结构学报, 1995, 16(5):57-63. LIU D H, HAO J P. Research on lateral pressure upon wall of reinforced concrete silo[J]. Journal of Building Structures, 1995, 16(5):57-63. (in Chinese)
[12] 韩阳, 李东桥, 陈家豪, 等. 筒仓静态储粮的边界压力及仓壁摩擦力试验研究[J]. 农业工程学报, 2018, 34(13):296-302. HAN Y, LI D Q, CHEN J H, et al. Experimental study on boundary pressure and wall friction under static grain storage in silo[J]. Transactions of the Chinese Society of Agricultural Engineering, 2018, 34(13):296-302. (in Chinese)
[13] 殷宗泽. 土工原理[M]. 北京:中国水利水电出版社, 2007. YIN Z Z. Principle of soil mechanics[M]. Beijing:China Water & Power Press, 2007. (in Chinese)
[14] 李广信. 高等土力学[M]. 2版. 北京:清华大学出版社, 2016. LI G X. Advanced soil mechanics[M]. 2nd ed. Beijing:Tsinghua University Press, 2016. (in Chinese)
[15] 介玉新, 郭政豪. 基于加速度计算边坡的安全系数[J]. 水力发电学报, 2018, 37(9):74-83. JIE Y X, GUO Z H. Acceleration-based approach to calculation of safety factors of slopes[J]. Journal of Hydroelectric Engineering, 2018, 37(9):74-83. (in Chinese)
[16] 介玉新, 李伟瀚, 张彬. 用加速度方法计算隧洞的安全系数[J]. 水力发电学报, 2018, 37(8):103-110. JIE Y X, LI W H, ZHANG B. Acceleration-based safety factor calculation of tunnel[J]. Journal of Hydroelectric Engineering, 2018, 37(8):103-110. (in Chinese)
[17] JIE Y X, WEN Y F, DENG G, et al. Impact of soil deformation on phreatic line in earth-fill dams[J]. Computers & Geosciences, 2012, 46:44-50.
[18] 介玉新, 周诗博, 陈杰, 等. 差分法计算一维固结的若干问题探讨[J]. 地下空间与工程学报, 2015, 11(S1):48-52.JIE Y X, ZHOU S B, CHEN J, et al. Discussion on difference method for calculation of one-dimensional consolidation[J]. Chinese Journal of Underground Space and Engineering, 2015, 11(S1):48-52. (in Chinese)
[19] 介玉新, 柏永亮, 余卓憬, 等. 边坡的潜在滑动面分析[J]. 工程地质学报, 2015, 23(S1):242-246. JIE Y X, BAI Y L, YU Z J, et al. Analysis on potential sliding surface of slopes[J]. Journal of Engineering Geology, 2015, 23(S1):242-246. (in Chinese)
[20] 介玉新, 柏永亮, 张彬. 基于加速度的边坡和挡土墙稳定性分析[J]. 地球科学与环境学报, 2015, 37(6):120-126. JIE Y X, BAI Y L, ZHANG B. Stability analysis of slopes and retaining walls based on acceleration[J]. Journal of Earth Sciences and Environment, 2015, 37(6):120-126. (in Chinese)
[21] 介玉新, 柏永亮, 张彬. 边坡潜在滑动面的包络线分析[J]. 水力发电学报, 2016, 35(3):28-35. JIE Y X, BAI Y L, ZHANG B. Analysis on envelopes for potential slip surfaces of slopes[J]. Journal of Hydroelectric Engineering, 2016, 35(3):28-35. (in Chinese)
[22] 介玉新, 李伟瀚, 张彬. 用加速度方法分析隧洞的稳定性[J]. 河海大学学报(自然科学版), 2018, 46(4):301-306. JIE Y X, LI W H, ZHANG B. Stability analysis of tunnel using the acceleration method[J]. Journal of Hohai University (Natural Sciences), 2018, 46(4):301-306. (in Chinese)