Evaluation of minimum factor of safety in slope stability. Box 366, beijing, peoples republic of chitla received september 1, 1987 accepted april 11, 1988. Stability calculations catenary method past developments an english engineer of the xviith century, robert hooke, made already in 1675 the correlation between the tensile stress in a chain and the compressive stress in an arch. Slope stability calculations using limit analysis slope. Mar 21, 2016 the aims of slope stability analyses are to understand the development and form of natural slopes and the processes responsible for different natural features. Im working on a tool that will tell me if a box will fall over when it is subjected to an edge drop test. To assess the stability of slopes under shortterm often during construction and longterm conditions. The discrete element method dem presents an advantage in the calculation of the interaction forces between. Application note slope stability analysis worked example 1 introduction this note describes the typical steps followed in setting up and analysing a slope stability problem with limitstate. This is the first step in calculating the vessels centre of gravity g. Pdf numerical methods in analysis of slope stability. Section j dip, sheets 7 to 10 slope stability calculations. Imo regulations including solas, stockholm agreement, hsc code, national and regional agreements present a complex picture of stability requirements.
Pdf importance of slope stability problem is the reason why so many alternate methods have been developed for evaluating the safety of a slope. Section j dip, sheets 11 to 18 slope stability calculations. Threedimensional slope stability problem with a surcharge load. A technique for the calculation of slope stability based upon the assumption of a plane surface of failure through the toe of the slope has been proposed by culmann see taylor, 1948. In california practice, the acceptable vertical depth of soil saturation is 1. Ecoslopes project for routine stability analysis and the assessment of the contribution of vegetation to slope stability.
Download spreadsheet to calculate slope stability calculation. Corestones at the slope face clayinfilled relict joint parallel to the slope face relict joint surfaces within weak matrix fig. Limit analysis and stability charts for 3d slope failures radoslaw l. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. This software and all associated electronic media and documentation are provided for use by the faculty and students of the licensed university or educational institution for educational purposes only. How do friction and cohesion work together to stabilize slopes. This statement may have been made before, but nothing is certain without historical records. Risk factors or slope factors and dose coefficients were calculated for exposure to radionuclides in a variety of scenarios. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes.
The slope section is drawn up and dimensions and parameters are fed in to the microsoft excel based program for stability calculations and comparisons of factors of safety using different methods of analysis. The verification examples are found in the following pdf documents. Pdf over several decades, the limit equilibrium method has dominated the usage. The corresponding output is the data file used for. The calculator searches the circular slip surface for which the factor of safety is minimal. Aug 06, 2014 download spreadsheet to calculate slope stability calculation. Theory of slope stability portland state university. The new computed factor of safety is the total resistance divided by the total driving force wsin.
Experience in using the variational method in slope stability. A computer program for slope stability calculations educational version of the utexas4 and texgraf4 software important notice. Evaluation of minimum factor of safety in slope stability analysis zuyu chen and changming shao institute of water consetvanc and hydroelectric power research, p. System sciences and earth natural hazards stability of. Pdf slope stability analysis is a keen area of interest to researchers of geotechnical. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of determining, relatively unambiguously, whether a. They are certainly major factors in cut slope stability and in the stability of fill slopes involving both internal and external slope failures. Budget can vary wildely for scantling calculations. Detailed pieziometric data at multiple locations and depths within and below the slope will likely be needed. Table 3 shows the calculations when the trial factor of safety is 1. Pdf geotechnical approaches for slope stabilization in. It is a slightly modified javascript clone of the slope stability software stabr ver.
Over 10 million scientific documents at your fingertips. Html 5capable browser required for graphical output. Slope stability is controlled by relief material strength soil water content vegetation. Slope stability analysis of the right abutment of a railway bridge proposed at about 350 m above the ground level, crossing a river and connecting two huge hillocks in the himalayas, india is. International ship stability workshop shipstab highlights. Step 2 analyze the stability of the slope for different strength properties. Download code slope stability calculation spreadsheet simplified bishop method. Calculations with a trial factor of safety equal to 1. Comparison of weight coating designs using the two design level analysis tools described in the above. Slope stability analysis geotechnical design manual m 4603 chapter 74 december 2006 slope stability analysis detailed assessment of the groundwater regime within and beneath the slope is also critical. Calculation as shown in later part of this paper will.
This was applied in the model by selecting all the boundary lines between the mudstone and weathered mudstone unshow the water table, to facilitate. The kinematic approach of limit analysis is explored in threedimensional 3d stability analysis of slopes. Navn adresse postnummer by email telefonnummer gyldig fra gyldig til reference name address zip code city email telephone valid from valid until reference. Step 4 analyze the stability of the slope if a groundwater flow calculation is specified first to establish the phreatic surface, and then the stability of the slope is. The aleksotas hill slope stability calculations of original natural slope and excavated slope.
Limit analysis and stability charts for 3d slope failures. On the other end, engineers may develop a set of scantling calculations and drawings that show every single deck, every single bulkhead, all of it. Application note slope stability analysis worked example. Lna ensures that all of the design and management team are always up to date with the latest requirements. Stability analysis of slope in strainsoftening soils using local arclength solution scheme article pdf available in journal of mountain science 141. Performance of inclining tests and lightweight calculations. Slope stability analysis is a keen area of interest to researchers of geotechnical. A set of 5 basic slope stability problems, together with 5 variants, was distributed in the australian geomechanics profession and overseas as part of a survey sponsored by acads association for computer aided design, in 1988. Slope stability computations transportation research board. Appendix c slope stability analyses table of contents figures summary of slope stability analyses, sheet 2 soil parameters, sheets 3 to 6 slope stability calculations.
Calculate the draft mark the readings at the end of the voyage, assuming that there is no. Experience in using the variational method in slope stability calculations. That is the level of effort required to submit a vessel for construction contract bids. An analysis of stability was applied to a slope, of complex geometry, composed of alternating sandstone and marls using finite elements and limit equilibrium methods. Next to gravity, water is the most important factor in slope stability. Rock slope stability analysis utilization of advanced. Geotechnical approaches for slope stabilization in residential area. Civilax is the knowledge base covering all disciplines in civil engineering. Application note slope stability analysis worked example 2.
In the project level property editor, under water table set use r u coefficientto true, the av. Slope stability evaluations by limit equilibrium and. Application note slope stability analysis worked example 4. Numerical methods in analysis of slope stability adila nuric 1, samir nuric 2, lazar kricak 3, resad husa gic 4 1,2 faculty of mining, geology and civil engineering, unive rsity of tuzla. Then, it calculates for this slip circle the corresponding critical seismic coefficient for which the factor of safety is 1. It is computed by summing the moments of all forces acting on an individual slice about the. Slope stability united states army corps of engineers. Pdf stability analysis of a rock slope in himalayas. That means that a block is placed under one edge of a box. Pdf stability analysis of slope in strainsoftening soils. Present and future possibilities of software to predict the stability of. This engineer manual em provides guidance for analyzing the static stability of slopes of earth and rockfill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. Lemdem coupling for slope stability analysis springerlink.
Performance of inclining tests and lightweight calculations as well as the development of stability books updated. This data is used to calculate the metacentric height. Dec, 2014 ok i know this should be easy but its been a few years since my physics lessons at college and im stumped. Example application 1 slope stability for a cohesive and. The majority of the risk factors and dose coefficients were calculated using ornls dcal software in the manner of federal guidance report 12 and federal guidance report for. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. The effect of water on cut and fill slope stability is briefly discussed below. During failure, the slope material was assumed to rotate as a single rigid mass bounded with logarithmic spiral rupture surface. Slope stability calculation spreadsheet simplified bishop. Slip4ex routine limit equilibrium slope stability analysis. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. Pdf lemdem coupling for slope stability analysis researchgate. Global stability with relict slip surface in this scenario, the presence of the relict slip surface was assumed. The use of the finite elements in calculations of stability has to overcome the weakness of the traditional methods.
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