Kinematic analyses of sliding and toppling failure of double free face rock mass slopes

Liang Qing Wang, Pinnaduwa Kulatilake, Hui Ming Tang, Ye Liang, Qiong Wu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Free face geometry shape plays an important role in determining failure and evaluating slope stability. Kinematic analysis is a very effective method in solving these issues stated above. Most kinematic analyses for rock mass slope stability mainly focus on the research of failure mode and maximum safe slope angle for single free face slopes. However, there are many slopes with double free face along strike of cut slope in engineering applications. In this paper, research on rock slope stability is extended to slopes with double free face. The corresponding sliding modes are divided into four types: (a) plane sliding along a discontinuity; (b) wedge sliding along a single discontinuity plane; (c) wedge sliding along the intersection line of two discontinuities and (d) toppling failure. On the stereographic projection, sliding zone for plane and wedge sliding can be marked as the area formed by the true dip direction lines of the two faces that form the double free face and the friction circle where the dip vector or the line of intersection vector should lie. The toppling zone can be marked as the area formed by the true dip direction lines of the two faces that form the double free face, friction circle and the periphery of the stereographic plot where the normal vector to the discontinuity should lie. The procedure to obtain the maximum safe slope angle for a double free face rock mass slope and the design principle to estimate the cut slope angle are suggested. Based on the method presented above, Shengjipo double free face rock mass slope, which is located in Zigui county, Hubei Province, is used as a case study to illustrate determination of failure modes and maximum safe slope angles.

Original languageEnglish (US)
Pages (from-to)72-77
Number of pages6
JournalYantu Lixue/Rock and Soil Mechanics
Volume32
Issue numberSUPPL. 1
StatePublished - Apr 2011

Fingerprint

toppling
kinematics
sliding
Slope stability
Kinematics
rocks
slope angle
Rocks
discontinuity
slope stability
rock
Failure modes
dip
Friction
friction
stereographic projection
Geometry
geometry
engineering
case studies

Keywords

  • Double free face rock mass slopes
  • Failure modes
  • Kinematic analysis
  • Maximum safe slope angle
  • Stereographic projection

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Soil Science
  • Civil and Structural Engineering

Cite this

Kinematic analyses of sliding and toppling failure of double free face rock mass slopes. / Wang, Liang Qing; Kulatilake, Pinnaduwa; Tang, Hui Ming; Liang, Ye; Wu, Qiong.

In: Yantu Lixue/Rock and Soil Mechanics, Vol. 32, No. SUPPL. 1, 04.2011, p. 72-77.

Research output: Contribution to journalArticle

Wang, Liang Qing ; Kulatilake, Pinnaduwa ; Tang, Hui Ming ; Liang, Ye ; Wu, Qiong. / Kinematic analyses of sliding and toppling failure of double free face rock mass slopes. In: Yantu Lixue/Rock and Soil Mechanics. 2011 ; Vol. 32, No. SUPPL. 1. pp. 72-77.
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