Pdf a comparison between limit equilibrium and finite element. Would like it to be user friendly and possibly have some initial tech support as i am learning to use it. Utexased4 slope stability software for educational purposes. Even though there is past research on lrfd of shallow foundations and piles, there are very few publications available on lrfd of slopes and retaining structures. The stated goals of this study were to perform a literature.
I need software to calculate the factor of safety and carry out a kinematic analysis for different landslide types. Lecture capture on slope stability, ordinary method of slices and modified simplified bishops method. Ui it fmi iuniversity of missouri adsc micropile design and construction seminar las vegas, nevada april 34, 2008 outline background typical implementation construction sequenceconstruction sequence stability analysis issues prediction of resistance for micropiles. The program can be used to the stability factor of safety for inhomogeneous slopes and embankments using both circular and noncircular slip surfaces. Stability of slope models under di erent compaction energies and slope geometries at the same initial static factor of safety fs was investigated considering.
Optimization of stabilization of highway embankment slopes using driven piles phase i by panos d. Highway administration fhwa has free downloadable software including. The oasys geo suite provides programs for slope, flexible wall, vertical displacement, retaining wall stability, tunnel settlement, pile and soil finite element analysis. Asd and lrfd of reinforced srw with the use of software program msew3. Of the software which is currently available from rocscience, half of all programs are either specifically dedicated to slope stability analysis ie. Rock slope design guide ohio department of transportation. Performancebased assessment of the seismic pseudostatic. Download geotechnical engineering software slide 8. Comparison of slope stability methods of analysis1 received october 12, 1976 accepted april 4, 1977 the papercompares six methods ofslicescommonly sed for slopestability analysis. Galena is a powerful, comprehensive and easytouse slope stability analysis system developed by geotechnical engineers for geotechnical, mining and civil engineers who want to solve geotechnical problems quickly and easily galena is one of the worlds leading slope stability analysis packages now used in 74 countries, in some of the worlds largest mining operations. Comparison of five different methods for determining pile. The purpose of this manual is to provide engineers and geologists involved in highway design and construction with a common understanding and approach to slope stability analysis for highway projects.
Lateral squeeze is more closely related to the evaluation of. I am shopping for software that will perform basic slope stability analysis. Deployment of the geosynthetic reinforced soil integrated bridge system from 2011 to 2017, synthesis. Fhwahi99007 1998 which discusses geologic terms related to rock slope stability. Slope stability software geotechnical engineering 101. Software for slope stability analysis slope stability. Further, for more complex analyses, the use of multiple methods for comparison is prudent. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of.
Threedimensional limit equilibrium slope stability benchmarking m. Schematic representation of a reinforced slope under seismic excitation the. Department of transportation federal highway administration december 2010. Utexas analyze the stability of complex slopes software. Engineers completing slope stability calculations should be familiar with the assumptions and limitations of the methods selected. Comparison of designanalysis methods for pile reinforced slopes. An investigation of the natural microscale mechanisms that cause volume change in expansive clays. Publications geotech federal highway administration. This report includes discussions of currently available lidar hardware and software, the current state of lidar for highway geotechnical applications rock mass characterization, rockfall characterization, asbuilt 3d measurements, best. Fhwa simple span beam approach with apparent earth pressures. Ground based lidar rock slope mapping and assessment. Computer modeling of slope stability problems has been widely. Schematic representation of a reinforced slope under seismic excitation the main seismic slope stability assessment.
Most commonly, the design goal for slopes is to economically select i slope angle and ii slope protection measures that will. Graduate theses and dissertations iowa state university capstones, theses and dissertations 2017 comparison of designanalysis methods for pile reinforced slopes. Quick comparison between lrfd and asd of srw using msew. Slope stability is a major concern for geotechnical and mining engineers worldwide, and consequently, a great deal of effort at rocscience is dedicated to slope stability analysis software. 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. The graphics and the pointandclick data input are also very good and makes the program very easy to use.
In this research, dynamic compaction method adjacent to slope edge was numerically simulated using 2d plainstrain nite element models. The effect of gravity is known, therefore, water is the key factor in assessing slope stability. The program combines an intuitive user friendly interface and the analytical philosophy behind the popular slope stability program, stabl, developed at purdue university. May 26, 2015 lecture capture on slope stability, ordinary method of slices and modified simplified bishops method. For detailed design guidance and reference, geotechnical designers are directed to fhwa nhi 05123 soil slope and embankment design. Pseudostatic slope stability procedures are often employed to evaluate the seismic performance of slope systems, at least in the initial evaluation s. Soils and foundations testing experience theory lesson 06 chapter 6 slope stability. A series of seven example slope stability problems for the computer program, utexas, is presented. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. This software has greatly simplified design and evaluation by allowing the mdt staff to quickly and efficiently evaluate the effects of soil. In this simulation, the transverse direction of the computational model is constrained to yield a plane strain state 120. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes.
Slopew stability analysis using 3d seepage results, march 18 march 11, 2020. 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. Wright of shinoak software, who is wellrecognized as one of the leading experts in solving problems in soil strength and slope stability duncan and wright, 2005. What is the best software to analyse the slope stability. It is concerned with 1 the characteristics and critical aspects of various types of slope stability problems, 2 geologic studies and site investigation procedures, 3 methods of designing slopes, including field observations and experience, slope stability charts, and detailed analyses, 4 factors of safety, and 5 methods of stabilizing.
As a geotechnical engineer, the software programs i have used most often have to be the ones available for slope stability or for geogrid design of a soil slope, besides using autocad and gint. Cdot20108 sponsored by colorado department of transportation in cooperation with the u. While the software was in the public domain, the versions made available by fhwa are now outdated, do not align with current fhwa recommended guidance, and are compatible with more current computer operating systems. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. The following table summarizes the methods typically included in slope stability software packages. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. Even though there is past research on lrfd of shallow. Slope stability analysis is performed to assess the safe design of a humanmade or natural slopes e. For those wishing to find fhwa software and related publications, it is available from mctrans or pctrans. This type of analysis is also utilized to determine. The fhwa has discontinued the distribution of all other software through this website.
The example problems consist of 1 a simple slope, 2 an embankment on a very strong foundation, 3 an embankment on a relatively weak foundation, 4 an excavated slope, 5 an embankment on a. Software for slope stability analysis based on the limit equilibrium analysis of the. Slope stability analyses provide a means of comparing relative merits of. Jul 07, 2010 new fhwa drilled shaft manual is done.
Slope stability is the resistance of inclined surface to failure by sliding or collapsing. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Comparison of five different methods for determining pile bearing capacities prepared for wisconsin highway research program andrew hanz whrp program manager 3356 engineering hall 1415 engineering dr. Stability analysis of dry sandy slopes adjacent to dynamic. The paper compares six methods of slices commonly used for slope stability analysis. 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. Research, a quarter century of geotechnical research, 1998, fhward98 9. A computer program for slope stability calculations educational version of the utexas4 and texgraf4 software important notice. High resolution sensing techniques for slope stability studies, final. Treat micropilecap beam system as a structural frame and apply the required resistance as a uniformly distributed load acting downslope and parallel to the slide surface. Computer software is used by mdts project geotechnical specialists in areas ranging from pile design to the evaluation of slope stability. What is the best software to analyse the slope stability researchgate.
Please note that software uses the effective vertical stress at subgrade to find an equivalent soil unit weight, water pressures are added separately depending on water condition assumptions. Xstabl provides an integrated environment for performing slope stability analyses on an ibm personal computer, or compatible. In order to investigate the influence of different soil nailing parameters on the safety factor of a slope, the slope stability is analyzed by the geostudio software with different analysis methods. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. Comparison of apparent lateral earth pressure coefficients with basal stability index fhwa 2004.
A comparison of finite element slope stability analysis with conventional limitequilibrium investigation reginald hammah, rocscience inc. Galena is a powerful, comprehensive and easytouse slope stability analysis system developed by geotechnical engineers for geotechnical, mining and civil engineers who want to solve geotechnical problems quickly and easily. The failure process of a soil slope as shown in fig. Associate professor of civil engineering josh hendrix david jaromin department of civil engineering. There are different research software are there to analyses the slope stability. Users manual for laterally loaded pile analysis program for the microcomputer, com624p version 2. Fredlund golder associates, saskatoon, canada abstract slope stability analyses have been performed using various software packages on a routine basis in geotechnical. The authors of the 1st and 2nd editions prepared by the fhwa in 1982 and 1993. The optional modules can be included in the deepex ultimate and can help you get the most out of your software version. Not all slope stability software is real expensive. Table of contents section page montana department of.
The factor of safety equations are written in the same form, recognizing whether moment and or force equilibrium is explicitly satisfied. Subsurface exploration, testing, slope stability, embankments, cut slopes, shallow. Next to gravity, water is the most important factor in slope stability. Fhwainjtrp20085, spr2634 final report limit states and load resistance design of slopes and retaining structures introduction the primary goal of this report was to develop load and resistance factor design lrfd methods for slopes and retaining structures. Comparison of designanalysis methods for pile reinforced.
Slide 2d limit equilibrium slope stability analysis software. This step is used to determine axial loads transferred to the micropiles. Is there any free software available for slope stability analysis. In cohesionless soils, water does not affect the angle of internal friction. Slide is the most comprehensive slope stability analysis software available, complete with finite element groundwater seepage analysis, rapid drawdown, sensitivity and probabilistic analysis and support design. The software in general is very good and ties in well with the way we do things here. Geostase is a 2d limit equilibrium slope stability analysis software program developed by dr. July 7, 2010 robert thompson although i have known for several weeks that the manual was finished i work for one of the authors, after all. A detailed comparison of limit equilibrium methods is discussed in fhwanhi 05 123. Comparison of several analysis methods blums method, fhwa approach, simple span beam approach of a 50ft excavation. Specialists in deep foundation design, construction, and testing and slope stability problems. The name geostase is an acronym for general equilibrium options for stability analysis of slopes and embankments.
Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. It provides guidance for understanding and applying policies, standards and criteria in recognition of the need to. Ge, principal consultant with gregory geotechnical gregeo. There is plenty of software available these days to do pretty much everything one can think of. However, more sophisticated methods have been developed to alleviate the deficiencies of the pseudostatic approach. Is there any free software available for slope stability. This chapter provides a basic outline of slope stability analysis. It is difficult to know how to adequately benchmark slope stability software package as the new features are often implemented faster than the related. Utexased4 is a slope stability computer program with a windowsbased graphical user interface for both entering and displaying the input data as well as displaying the results of computations.
Foundation design of embankments on varved clays 1977. Limit equilibrium design framework for mse structures with. Select trial micropile layout location, spacing, batter angles. Utexas4 is a computer software application for computing the stability of earth and earthrock slopes and embankments.
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