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Topic: Slope failure

    Note: these results are not from the primary (high quality) database.

The Green Toolbox - Documentation - Erosion module General term for a range of rapid mass movements and flow failures, occurring on slopes exceeding approximately 25 degrees, usually less than 1.5 metres deep, and with failure surfaces for the most part approximately parallel to the land surface. The Slope Stability Assessment module allows you to test a planting plan, species by species, for its impact on slope stability. However, ground weakening which accompanies development of failure conditions is often partly irreversible, and the original level of stability is theoretically not recaptured simply by similar levels of plant cover. www.landcareresearch.co.nz /research/biodiversity/greentoolbox/erosion.asp   (2598 words)

USGS - Shear strength and slope stability at sites in the Caribbean National Forest and Coamo area, Puerto Rico Slope failures in the Caribbean National Forest appear to occur by initial tensile failure of saprolite materials at the crown, followed by shear failure along the slope. In-situ shear strength tests, used in conjunction with slope-stability analyses are used to determine factors of safety, and failure mechanisms in landslide-prone areas in Puerto Rico. This combination of factors usually provides more stable slopes in the Coamo area than in the National Forest. pr.water.usgs.gov /public/webb/bibliography/abstract101.html   (314 words)

STABL -Slope Stability Analysis Software The calculation of the factor of safety against instability of a slope is done using one of the following methods: Bishop Simplified Method (applicable to circular shaped failure surfaces), Janbu Simplified Method (applicable to failure surfaces of general shape), and Spencer's Method (applicable to any type of surface). STABL is a computer program written in FORTRAN for the general solution of slope stability problems by two-dimensional limiting equilibrium methods. STABL features unique random techniques for generation of potential failure surfaces for subsequent determination of the more critical surfaces and their corresponding factors of safety. www.ecn.purdue.edu /STABL   (191 words)

Slope Stability Where the depth to a failure surface is small compared to the depth of the slope. Based on the type of soil the slope stability analysis assuming circular failure in divided into two categories: * Using the circular type of failure, the slope may fail in the following ways: www.eng.fsu.edu /~tawfiq/geotech/slope.html   (443 words)

NIOSH Mining: Slope Stability CDC/NIOSH A study was conducted to determine the causes of slope failure and highwall/spoilbank failure and included: a review of accident statistics; a review of mining laws pertaining to surface mining; a literature review; and mine visits. Slope stability accidents are one of the leading causes of fatalities at U.S. surface mining operations. Several remote-sensing technologies are being evaluated as tools to monitor slopes for hazards and to assess slope stability. www.cdc.gov /Niosh/mining/topics/groundcontrol/slopestability.htm   (955 words)

COSTA - CONTINENTAL SLOPE STABILITY - Home Page A multidisciplinary project like COSTA combines expertise on slope failure from the various settings on European continental margins, from glacier-dominated margins in Polar Regions to river-dominated margins in semi-arid regions of the Mediterranean. For this reason, COSTA will constitute a sound basis for future assessment and prediction of slope failure and gas hydrate presence. The COSTA project aims to advance at the optimum achievable level the knowledge regarding slope stability along European margins from the W Mediterranean in the south to the NE Atlantic in the north. www.ig.uit.no /costa/main.htm   (955 words)

Free Slope Stability Software Wedge Failure Analysis, Analyzes wedge failures in rock slopes. Plane Failure Analysis, Analyzes planar failures in rock slopes. the factor of safety (FS) of a geosynthetic lined slope. www.geoengineer.org /applications-slope.htm   (187 words)

Slope Stability Analysis with Nonlinear Failure Criterion In this paper, an improved method using a "generalized tangential" technique to approximate a nonlinear failure criterion is proposed to estimate the stability factor of a slope on the basis of the upper bound theorem of plasticity. Two typical slope stability problems (a homogeneous soil slope with two slope angles and a vertical cut slope with a tension crack) are analyzed using the proposed method. A stability factor (or a limit load) computed using a linear Mohr-Coulomb (MC) failure criterion which circumscribes the actual nonlinear failure criterion is an upper bound value of the actual stability factor (or limit load). www.pubs.asce.org /WWWdisplay.cgi?0406035   (417 words)

Slope Stability When an engineer checks a slope against potential failure, they determine and compare the shear stress developed along the most likely rupture surface with the shear strength of the soil. Water seepage through the slope and the choice of a potential slip surface add to the complexity of the problem. Usually, slides are due to excavation or to undercutting the foot of an existing slope. physics.uwstout.edu /geo/slope_stability.htm   (598 words)

E&PS 481/581 Problem 2 - Slope Stability Once the functions are entered, do your first calculation using the slope angle as measured, using an average value of colluvium thickness (h) of 4 m, and with saturated fraction = 0. In number 2 you simply changed thickness, but keep in mind that the slope angle might increase if more colluvium is added to the upper slope, or if the lower slope is cut away. The very steep roadcut face in the colluvium shows that this material can be at least temporarily stable at high slope angles, well above the angle of repose for this material, and sand and gravel are commonly referred to as cohesionless materials. epswww.unm.edu /facstaff/gmeyer/eps481/eps481prob2.htm   (623 words)

CHAPTER 5 In the circular failure charts produced by Hoek and Bray (1977) provision was made for the tension cracks to be located in either the upper surface of the slope or in the face of the slope, as well as the groundwater flow patterns (Figure 5.27). For stability analysis, the charts relate a minimum stability number Nf to the slope angle (i) in terms of a factor lcø and a depth factor D, with separate charts for varying values of the pore pressure ratio ru. In order to use the charts to determine the factor of safety of a particular slope, the steps outlined below and shown in Figure 5.28 should be followed: www.metu.edu.tr /~vedat/chapter5/chapter5_9.htm   (871 words)

SVDynamic - 2D Slope Stability Software Slope stability analysis is an integral part of many geotechnical engineering studies. SVDynamic represents a revolutionary new method of slope stability analysis that extends the capabilities of limit equilibrium methods of analysis. Although numberous methods of analysis exist, the failure mechanism is still not fully understood. www.soilvision.com /subdomains/svdynamic.com/svdynamic.shtml   (438 words)

RockWare, engineering- ROCKPACK III: rock slope stability analysis software is a package of programs useful for all phases of rock slope analysis and design where stability is controlled by the orientations and characteristics of rock mass discontinuities (joints, bedding, foliations, faults, etc). package are based on the text "Rock Slope Engineering" (Hoek and Bray) with enhancements and modified approaches developed over the past 10 years in cooperation with the Corps of Engineers, the US Forest Service, and numerous state DOT's. is designed to support the user from data collection through geologic analysis by stereonet to safety factor calculations by limit equilibrium methods and finally to slope design and design of artificial support if required. www.rockware.com /catalog/pages/rockpack.html   (666 words)

Slope Stability 3D slope stability analyses of arbitrary slip surfaces using a variant of the ordinary method of columns or a variant of the Bishop simplified method. 2D slope stability analyses of circular slip surfaces using Simplified Bishop or Spencer methods. The Java based program comes with a user-friendly graphical interface so you can easily create the ground, failure, and phreatic surfaces as well as loads or boundary pressures. www.tagasoft.com /TAGAsoft/TAGAsoft/Products/slope   (136 words)

APUG - Reciprocity misbehavior. The aim in astrophotography is to find suitable films that have the least reciprocity failure and least color shift in the very long exposures used. This obviously works off failure factor data much further out than 1 second, and perhaps is more applicable to pinhole shooters and astrophotographers. Plot the correction time at any indicated time on log-log paper and draw a line through that point with a slope of 1.62 vertical inches for each horizontal inch. www.apug.org /forums/showthread.php?t=11566   (136 words)

Alexander's Gas & Oil Connections - Alaska House passes bill to review North Slope gas line "Conservatively, 100 tcf of natural gas is stranded on the North Slope, and the failure to recognize this vital resource as a valuable commodity is in direct conflict with the state constitution's requirement to maximize use of our natural resources to benefit all Alaskans," Whitaker said. After studying a proposed gas pipeline project from the North Slope to the Lower 48 for more than a year, Alaska's three gas producers -- ExxonMobil, BP and Phillips -- have said the estimated $ 15 bn to $ 20 bn cost of the project makes it uneconomical. The bill, sponsored by Representative Jim Whitaker (Republican-Fairbanks) and passed, would create the Alaska Gas Group, a state-owned company whose first job would be to produce a feasibility study on possible construction of such a pipeline. www.gasandoil.com /goc/news/ntn22053.htm   (136 words)

Continental Slope and Rise deposition near the shelf edge may cause slope failure and canyon initiation slumps and debris flows from the slope and levees complexes submarine fans build up on the rise and abyssal plain at the foot of the slope and at the end of large submarine canyons www.es.mq.edu.au /courses/GEOS260/fans.htm   (136 words)

SBlock slope stability software SBlock automatically identifies potential plane and wedge failure in plit slope benches using joint set statistics. What is the stability of the large wedge formed by the intersection of four faults? SBlock was originally developed for, and used by a group of major mining companies with open pit operations around the world. www.icubed.com /~gsester/SBlock-Page1.html   (356 words)

Slippery Slope - Compare Prices, Reviews and Buy at NexTag - Price - Review Steering Clear: Avoiding the Slippery Slope to Moral Failure From slippery slopes to snowy sidewalks, our Aprs Ski Sweater will keep your dog toasty warm in stunning style. A Slippery Slope: The Long Road to the Breakup of AtandT www.nextag.com /slippery-slope/search-html   (137 words)

Creep - Wikipedia, the free encyclopedia A failure mode of polymers at room temperature, as well as metals and ceramics under high temperatures. The slow progression of rock and other debris down a low grade slope; it can also refer to slow deformation of such materials as a result of prolonged pressure and stress (also known as downhill creep) CREEP, an abbreviated form of The Committee to Re-elect the President, formed by President Nixon in 1972. en.wikipedia.org /wiki/Creep   (137 words)

Supplemental Bibliography Part 3 It is recommended that conventional stability analyses should be used for design of the sheet pile-levee system; the foundation stability can be addressed by standard slope stability analysis and pile stability can be analyzed using the traditional limit-equilibrium method. In the predictive analysis, a finite element model of the structure and a theoretical assessment of damping phenomena are combined with a response prediction method which utilizes the principle of reciprocity of ocean waves. Finally, the elements of risk in bidding pile work have been learned through numerous court of claims cases on topics such as estimated lengths, fixed-cost items bid as variable costs, delays in furnishing proper equipment, or required pile lengths. www.wingnet.net /~jfwnctm/wave/biblios3.htm   (137 words)

Science Fair Projects - Creep it is a failure mode of polymers at room temperature, as well as metals and ceramics under high temperatures. it is the slow progression of rock and other debris down a low grade slope; it can also refer to slow deformation of such materials as a result of prolonged pressure and stress (also known as downhill creep) it is a deliberately slow and quiet method of walking or moving; "He was trying to creep up on me and scare me!" www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Creep   (137 words)

Untitled Document A problem with an insurance claim for this failure mode is that many insurers have never heard of clay creep or at least maintain they have not. If part of the house in question, or whatever structure is involved, is founded on the top part of the failure zone, then there will be a reduction in support of that part of the structure with consequential cracking and possibly eventual collapse. Clay creep: the surface of the clay gradually moves down the slope. www.johnbellman.co.uk /whatIsLandslip.htm   (137 words)

3ABR295 Appellee North Slope Borough filed the adversary proceeding, A88-00011-004, objecting to appellant's discharge based upon appellant's alleged failure to Bankruptcy Judge Herbert A. Ross also granted defendant/appellee North Slope Borough a nondischargeable judgment against appellant in the amount of $6,170.27 pursuant to 11 U.S.C. §523(a)(l). The bankruptcy court ruled that appellant had an interest in certain fuel tanks which he failed to report in his schedules, sold property of the estate without court approval, and used the proceeds for personal use, also without court approval. www.akb.uscourts.gov /3abr295.htm   (1315 words)

EnvironmentallySensitiveAreasCodeTemplate.doc Erosive Lands and Slope Failure Lands are lands that are subject to damage from erosion and slope failure, or defined as erosion and slope failure lands on the Environmentally Sensitive Area Overlay map and have a slope of fifteen percent or greater. Riparian Preservation Areas - The lands shown on the official maps as Riparian Areas, These areas are identified as 75 feet from the stream centerline for streams draining a basin of greater than 1 square mile, and 25 feet from streams that drain areas of one square mile or less. The purpose of this Chapter is to provide for safe, orderly and beneficial development of areas characterized by diversity of physiographic conditions and shown on the Official Environmentally Sensitive Area Maps as Environmentally Sensitive Areas; to limit alteration of topography and reduce encroachment upon, or alteration of, such areas. www.governor.state.ut.us /planning/CriticalLands/EnvironmentallySensitiveAreasCodeTemplate.doc   (4471 words)

Medina v. State The state basically argued that it was immune from suit in this case because "it was the design of the road and the cut slope above the road that led to the rock striking the bus," not the state's failure to maintain the highway. Whether the state's failure to maintain a right- of- way fence adjacent to a state highway renders it liable in a private tort action for injuries sustained by a highway user is indeed dependent on the nature and extent of the state's duty under the Fence Law. The Medinas, in addition to their failure to maintain claim, alleged that the state was negligent in failing to close U.S. Highway 6 to public travel, failing to warn the public that U.S. Highway 6 was unsafe for travel, and failing to recommend that the public use alternate routes. www.childrensjustice.org /litigation/Litigation/COCases/Medina_v_State.html   (4471 words)

Rocscience Products - Slide v 5.0 Using Slide 5.0, you may determine the probability of failure and reliability index for either the deterministic failure surface with the smallest factor of safety, or for the entire slope. Slide 5.0 is the only slope stability software to include built-in steady-state unsaturated groundwater analysis capabilities using the finite-element method. Slide 5.0 is the most comprehensive slope stability analysis software available, complete with sensitivity, probabilistic and back analysis capabilities. www.rocscience.com /roc/software/Slide.htm   (269 words)

Earthquake damage assessment Based on the result that statistically investigated the past example of slope collapse induced by seismic ground motion, criteria to assess slope instability induced by seismic ground motion was created and hazard of each steep slope has been assessed with it. First, geomorphological and geological factors tending to generate collapse commonly caused by the three earthquakes (the 1964 Niigata Earthquake, the 1968 Ebino Earthquake, the 1975 Ooita-ken-chubu Earthquake) are selected as general properties of slope collapse using the result of Laboratory of Nihon Doro Kodan (1980, 1981) as shown Table 3.1.6. Webmaster translates the title “Study on the extension of area with surface failure and landslide caused by earthquake”). iisee.kenken.go.jp /net/yokoi/methodology/SlopeFalure.htm   (1183 words)

SIR - Water Management - Hummingbird Creek Debris Event The slopes in the vicinity of the failure zone are potentially unstable due to their steep gradients, adversely dipping bedrock and shallow unconsolidated colluvium. The colluvium was identified as the "weakest link" in the slope stability system due to its reworked state and potential for shear strength reduction with increasing soil moisture content. The colluvium is identified as the "weakest link" in the slope stability system due to its reworked state, and its susceptibility to shear strength loss due to elevated porewater pressures. wlapwww.gov.bc.ca /sir/wm/eng/geomorph/humbird/hbfinal.html   (14768 words)

Stress-Strain Curve Generation - the shear stress at failure- is a function of friction angle at failure, initial stress state and slope of the stress path in the soil test. The proposed functional stress-strain relation is a linear combination of hyperbolas, and therefore the condition of zero slope at finite strains (peak stress or failure) is not satisfied. A modified hyperbolic function shown in Figure 2 was proposed by Prevost and co-workers, which is applicable to both simple shear (Prevost and Keane (1989)) and triaxial stress states (Griffiths and Prevost (1990)), for a wide range of shear strain levels. www.cee.princeton.edu /~radu/papers/const/node12.html   (14768 words)

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