考虑地质成因的土坡可靠度分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (235 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Because spatial variability often exists in natural soil slope，which is mainly dominated by its geologic origin under the same soil parameters statistical variability，the slope stability is not really same. Traditional deterministic slope stability analysis method and reliability slope stability analysis method based on random variable model can not deal with the geologic origin of slope mass. The scale of fluctuation of soil parameters can be estimated by its geologic origin. Thus geologic origin can be included in the slope stability analysis framework by means of scale of fluctuation of soil parameters. Reliability analysis of soil slope stability considering geologic origin employing 1D random field and first order reliability method(FORM) is proposed and its specific analysis flow is also introduced. The proposed analysis method is illustrated by an example of embankment. Example calculation results indicate that spatial variability of parameters of rock and soil has great influence on slope stability. Estimation of scale of fluctuation of soil properties through geologic origin provides a realistic solution for the reasonable consideration of spatial variability of soil parameters in reliability analysis of slope stability. The proposed method is practically applicable and quite valuable for practice.

Key words： slope engineering soil slope reliability probabilistic analysis geologic origin spatial variability scale of fluctuation

Received: 15 April 2011

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I9/1904

[1] LUMB P. The variability of natural soils[J]. Canadian Geotechnical Journal，1966，3(2)：74–96. [2] VANMARCKE E H. Probabilistic modeling of soil profiles[J]. Journal of the Geotechnical Engineering Division，ASCE，1977，103(11)： 1 227–1 246. [3] VANMARCKE E H. Random fields：analysis and synthesis[M]. Cambridge：MIT Press，1983：20–188. [4] BAECHER G B，CHRISTIAN J T. Reliability and statistics in geotechnical engineering[M]. New York：John Wiley and Sons.，2003：205–219. [5] EL-RAMLY H，MORGENSTERN N R，CRUDEN D M. Probabilistic stability analysis of a tailings dyke on pre-sheared clay shale[J]. Canadian Geotechnical Journal，2003，40(1)：192–208. [6] EL-RAMLY H，MORGENSTERN N R，CRUDEN D M. Lodalen slide：a probabilistic assessment[J]. Canadian Geotechnical Journal，2006，43(9)：956–968. [7] KRAHN J. Stability modeling with SLOPE/W—an engineering methodology[M]. Calgary：GEO-SLOPE/W International Ltd.，2004：251–252. [8] 包承纲，高大钊，张庆华. 地基工程可靠度分析方法研究[M]. 武汉：武汉测绘科技大学出版社，1997：64–69.(BAO Chenggang，GAO Dazhao，ZHANG Qinghua. Study of reliability analysis method in ground engineering[M]. Wuhan：Wuhan Technical University of Surveying and Mapping Press，1997：64–69.(in Chinese)) [9] LI K S，LUMB P. Probabilistic design of slopes[J]. Canadian Geotechnical Journal，1987，24(4)：520–535. [10] LACASSE S，NADIM F. Uncertainties in characterizing soil properties，in uncertainty in the geologic environment：from theory to practice[C]// SHACKELFORD C D，NELSON P P，ROTH M J S ed. Proceedings of Uncertainty?96，ASCE Geotechnical Special Publication No.58. Mdison：ASCE，1996：49–75. [11] 李小勇，谢康和，虞颜. 土性指标相关距离性状的研究[J]. 土木工程学报，2003，36(8)：91–95.(LI Xiaoyong，XIE Kanghe，YU Yan. Research of the characteristics of correlation distance on soil properties indices[J]. China Civil Engineering Journal，2003，36(8)：91–95.(in Chinese)) [12] DUNCAN J M，NAVIN M，WOLFF T F. Discussion of “Probabilistic slope stability for practice”by H. El-Ramly，N. R. Morgenstern and D. M. Cruden[J]. Canadian Geotechnical Journal，2003，40(3)：848–850. [13] FENTON G A，VANMARCKE E H. Spatial variation in liquefaction risk assessment[C]// Proceedings of the ASCE Geotechnical Engineering Congress. Colorado：Boulder，1991：594–607. [14] PHOON K K，KULHAWY F H. Characterization of geotechnical variability[J]. Canadian Geotechnical Journal，1999，36(4)：612–624. [15] 南亚林. 黄土地区土性参数的统计分析及在公路边坡中的应用[硕士学位论文][D]. 西安：长安大学，2006.(NAN Yalin. Statistical analysis of soil property parameter and its application to highway slope in loess area[M. S. Thesis][D]. Xi?an：Chang?an University，2006.(in Chinese)) [16] JAKSA M B. The influence of spatial variability on the geotechnical design properties of a stiff，overconsolidated clay[Ph. D. Thesis][D]. Adelaide：University of Adelaide，1995. [17] LOW B K，TANG W H. Efficient spreadsheet algorithm for first-order reliability method[J]. Journal of Engineering Mechanics，2007，133(12)：1 378–1 387. [18] CHRISTIAN J T，LADD C C，BAECHER G B. Reliability applied to slope stability analysis[J]. Journal of Geotechnical Engineering，1994，120(12)：2 180–2 207. [19] EL-RAMLY H，MORGENSTERN N R，CRUDEN D M. Probabilistic slope stability analysis for practice[J]. Canadian Geotechnical Journal，2002，39(3)：665–683.