Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads @inproceedings{Hossain2011StabilityAO, title={Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads}, author={M. Hossain}, year={2011} } T&F logo. 28, Sharma et al. 1: Dimensions and surfaces defining size and shape of wedge. ROCK ANCHOR STABILISATION OF BEDDING PLANE SHEAR FAILURES ON THE A55, RHUALLT HILL ... CHAPTER EIGHT Types of rock slope failures: kinematic feasibility. Some attention was focused on the stability of Norwegian rock slopes after the destructive rock-avalanches and tsunamis in Tafjord and Loen in 1934 and 1936. A three-dimensional wedge failure analysis was presented by Coates (1967), Lond et al (1970) and Hudson & Harrison (1997). Plane failures in rock slopes occur when a geological discontinuity strikes parallel or nearly parallel to the slope face and dips at an angle greater than the angle of internal friction. One of the structurally controlled modes of failure in jointed rock slopes is plane failure. Production and hosting by Elsevier B.V. on behalf of King Saud University. bedding planes, foliation, faults). There are numerous analytical methods for the rock slope stability including limit equilibrium, stress analysis and stereographic methods. Plane failure with condition of failures • The dip direction of the planar discontinuity must be within ( ±20o) of the dip direction of the slope face • The dip of the planar discontinuity must be less than the dip of the slope face (Daylight) • The dip of the planar discontinuity must … We use cookies to help provide and enhance our service and tailor content and ads. Plane failure analysis of rock slopes: A reliability approach. Rock slope stability analysis has been a challenging problem for civil and mining engineers. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Plane failure takes place due to the presence of a structural discontinuity. The presented method can obtain not only the detailed stability status at any grid node of a complex shear plane but also the global safety of the slope. Kinematic Analysis – Planar Rock Slope Failure To consider the kinematic admissibility of plane instability, five necessary but simple geometrical criteria must be met: (i) The plane on which sliding occurs must strike near parallel to the slope face (within approx. IS 14448 (1997): Code of practice for reinforcement of rock slopes with plane wedge failure. Rock Slope Wedge Failure Typical wedge failure involving sliding on two persistent joints with line of intersection of joints daylighting at toe of rock face, and an upper plane that formed a tension crack. The plane failure in rock slope occur when a structural discontinuity plane dips or daylight towards the valley at an angle smaller than the slope face angle and greater than the angle of friction of the discontinuity surface (Tang et al., 2016, Kovari and Fritz, 1984). Sliding mass is the mass of soil within the slip plane and the ground surface. 10.1680/geot.2004.54.4.279 Alternatively, the planar failure may be located on a nose of rock so that the slope forms the lat-eral termination of the failure mass. Mining under an open pit slope results in the collapse and slide of the slope. Create a free account to download. Login; Hi, User . There is a theory that all slopes are inherently unstable and it is only a matter of geologic time that slope failure occurs. Logout. The stability of the slope, having plane mode of failure, depends on the geometry, rock type, potential failure plane characteristics, groundwater conditions, dynamic loading and the surcharge conditions. Hoek and Bray (1981) gave an analytical approach for plane failure analysis for rock slopes that is limited to those slopes in which the upper slope surface is horizontal and the tension crack is vertical. International Journal of Surface Mining, Reclamation and Environment: Vol. Observed failure modes in rock slopes are of a wide variety. It analysis the methods for . Download Free PDF. Landslide developed in rock mass usually has irregular shear plane. Each of these methods has their own advantage and limitations owing to the slope conditions, application requirement and capability of an expert. 1: Dimensions and surfaces defining size and shape of wedge. PDF. ±20°). This types of failures generally occurred in nature where the bed of rocks is found below the certain depth of the soil mass along the slope and soil above it slide due to a decrease in the bond between them. This chapter describes the method of analysis for plane failure and demonstrates its application to the design of reinforced slopes. It is also known as block failure or plane failure. of failure in rock slopes with the structural configu-ration described above to compare the behaviour of two-and three-dimensional slopes. Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads @inproceedings{Hossain2011StabilityAO, title={Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads}, author={M. Hossain}, year={2011} } 28 Full PDFs related to this … joints and bedding planes) would be needed for every cut-slope for the assessment and identification of potential instability problems. This paper . Corpus ID: 109749725. A short summary of this paper. Footwall slope Bi-planar failure Ploughing failure FDEM DEM Brittle fracture Footwall slopes refer to unbenched rock slopes in which the slope face is parallel to a set of persistent disconti-nuities (e.g. The plane failure is one of the rock slope failures observed in field situations when the discontinuity is in the form of joint planes. 3.1 . Abstract In stratified sedimentary and meta-sedimentary rock formations ‘plane mode’ of rock failure is very common. Failure of a rock slope on one or two plane surfaces is the simplest but at the same time the most important type of sliding failure and forms the basis for the stability analysis of rock slopes. Toppling can occur for a variety of reasons: undercutting of the toe of the slope, frost-wedging … View of Beartooth Highway along the east side of the Beartooth Mountains, near Red Lodge, Montana. Plane failure analysis of rock slopes: A reliability approach. The slope failure occurred along the plane of the soil mass is known as wedge failure. The slope face is vertical with a height H, the failure plane is oriented at an angle ψ, and a vertical load, L, is applied to the upper slope. Toe failure is the most common failure in which failure plane passes through toe of slope. In this case the failure plane intersects the slope above toe. In this work we study progressive failure using concepts of statistical physics and by means of numerical methods using distinct element methods (DEM). 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In this paper, a combination of methods including Google Earth and field investigations is applied to investigate the process of eastern slope failure induced by underground mining in the Yanqianshan Iron Mine over five years. Note that a rockslide is similar to an avalanche because they are both slides of debris that can bury a piece of land. Search all titles. discontinuities, several types of slope failure, such as plane failure, wedge failure, toppling failure, buckling failure and circular failure, are often observed. Slope stability analysis is a static or dynamic, analytical or empirical method to evaluate the stability of earth and rock-fill dams, embankments, excavated slopes, and natural slopes in soil and rock. … The unit weight of the rock is γ. Failure in rock slope masses governs by the presence of joints, its orientation, and joints’ persistence. The slope face is vertical with a height H, the failure plane is oriented at an angle ψ, and a vertical load, L, is applied to the upper slope. © 2017 The Author. Search all collections. Plane failures in rock slopes occur when a geological discontinuity strikes parallel or nearly parallel to the slope face and dips at an angle greater than the angle of internal friction. You are currently offline. Toe failure is the most common failure in which failure plane passes through toe of slope. The wedge failure generates a failure plane that is inclined. the circular failure can be considered. The 27. 2.5 Wedge failure 14 Fig. Sliding Failure of Soil . [1], [3] and [4] gave the analytical solution for the plane failure mode in rock slopes. Plane Failure Analysis calculates the factor of safety for plane failures in rock and soil slopes where defined discontinuity planes exist. [1], [3] and [4] gave the analytical solution for the plane failure mode in rock slopes. Planar rock slope failure occurs when a mass of rock in a slope slides down and along a relatively planar failure surface. Failure of a rock slope on one or two plane surfaces is the simplest but at the same time the most important type of sliding failure and forms the basis for the stability analysis of rock slopes. Therefore, in kinematic analysis, the orientation of the combination of discontinuities and slope face is examined to determine if certain modes of failure can be occurred. Rotational failure can be seen in finite slopes such as earthen dams, embankments, man-made slopes etc. Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads @inproceedings{Hossain2011StabilityAO, title={Stability analysis of anchored rock slopes against plane failure subjected to surcharge and seismic loads}, author={M. Hossain}, year={2011} } Rock slope failure involves an interplay between existing discontinuities and development of new fractures in intact material. KEYWORDS: slopes; rocks/rock mechanics INTRODUCTION Plane failure—the downdip sliding on a single set of dis-continuities—constitutes an important mode of failure of rock slopes. Those analysis, they assumed that the upper slope surface is horizontal and tension crack is vertical. Weak or fragmented rock, like soil, may fail in the circular mode. 3.1 . 2.3 Plane failure 11 Fig. Download Full PDF Package. However, as the scale increases, simple structurally controlled failures are less dominate, and more complex failures such as step-path failures start to develop. Sliding mass is the mass of soil within the slip plane and the ground surface. The size of planar failures can range from a few cubic meters to largescale landslides that involve entire mountainsides. The aim of the investigation is to determine the influence of the main parameters on the safety factor (Hoek and Londe, 1974). Download PDF Package. A three-dimensional wedge failure analysis was presented by Coates (1967), Lond et al (1970) and Hudson & Harrison (1997). This construction legal animation illustrates how a slope failure occurred in a reservoir. An analysis is presented here which can take these factors into account. The stability of the slope, having plane mode of failure, can be assessed by different methods which can be broadly classified as conventional and numerical methods. 2.7 Diagram of the plane normal to the intersection of joint sets 1 and 2 15 IS 14448: Code of practice for reinforcement of rock slopes with plane wedge failure by Bureau of Indian Standards Publication date 1997 Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Civil Engineering Section Name: Rock Mechanics (CED 48) Designator of Legally Binding Document: IS 14448 Title of Legally Binding Document: Code of practice for reinforcement … (1995). A rockslide is a type of landslide caused by rock failure in which part of the bedding plane of failure passes through compacted rock and material collapses en masse and not in individual blocks. The slope may demonstrate these conditions in a simple uniform manner or there may be complex conditions owing to variability in the slope geometry and heterogeneity in the slope material. The infinite slope is defined as the slope having no boundaries and contains same properties of soil up to assumed equal depth along the slope. Four such ratios were tested, as summarized in Table I. Anchored rock slope… Pablo Chang Huang. If sliding distance of rock block or rock mass that detached by sliding, toppling, or falling was negligible to descending distance through air, it is dened as Figure. 279-280. Summary A simple formula for plane slope failure is derived, which may be used for the design of … An approach for calculating distributed factor of safety of the irregular shear plane was put forward in this paper. Landslide can result either from rock failure or soil failure. 21 are shown four types of failure of rock slopes: (a) plane, (b) wedge, (c) circular, and (d) toppling. Geometry of slope exhibiting plane failure: (a) cross-section of the rock slope with a plane failure situation; and (b) release surfaces at ends of plane failure. Rock Slope Failure. Search: Search all titles. 9, No. Free PDF. Definitions of key Terms in Slope Failure. Copyright © 2021 Elsevier B.V. or its licensors or contributors. There are several parameters including surcharge and seismic loads that govern the stability of the rock slope against plane failure in field projects. Figure 8. Geotechnique -London- 54 (4) , pp. The plane failure is one of the rock slope failure modes in field situations, and the limit equilibrium approach for the estimation of the factor of safety of the rock slope against plane failure has been well accepted by the engineers. Peer review under responsibility of King Saud University. 3.2 . Slope Failure Processes • Rock fall occurs when ice wedging loosens angular boulders from rocky cliffs. (1995). The K M Mountain land-slide in the state of Washington (Lowell 1990), This type of failure occurs when there are fissures, joints, or weak soil layers in slope, or when a … Fig. Areas subjected to slope deforma-tion can provide important insights into the actual cause of rock avalanching, and may help to identify key observations that warn or are precursors of future events. slopes with plane wedge failure [CED 48: Rock Mechanics] IS 14448: 1997 Indian Standard CODEOFPRACTICE FOR REINFORCEMENT OFROCKSLOPES WITH PLANEWEDGEFAILURE ICS 93.020 1997 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 1997 Price Group 5 (Reaffirmed - 2012) AMENDMENT NO.1 DECEMBER 2006 TO IS … Is inclined cubic meters to largescale landslides that involve entire mountainsides own advantage and limitations owing to the use cookies... Effective forces in the rock slope failure under self weight, water forces, surcharge, seismic... 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