In the models, the pattern of parallel deterministic joints was used in spacing of 2 meters. Slope stability analysis geostru software provider for. By analyzing the change in slope failure mode, effects of the bolt head, spacing, inclination, and arrangement on the stability of the slope are investigated. The extensive rock anchor programme undertaken as part of the rock slope stability required the formation of double corrosion protected permanent. You can specify water pressure, material shear strength, surface loads and horizontal ground acceleration. Geoslope international ltd, calgary, alberta, canada. Rock stability is a tool for rock slope stability analyses planar, polygonal slip surface. A wide variety of rock bolt for slope stability options are available to. External loading, groundwater and support can all be modeled in a variety of ways. To study the effect of length of rock bolts on the stability of rock slopes, the slopes in different dips such as 30, 45, 60, and 75 were modeled by phase2 software rocscience, 1999. The principle is that the bolt spacing guarantees that the rockbolts interact with each other. Rs2 formerly rs 2 or phase 2 is a powerful 2d finite element program for soil and rock applications. Roctopple rounds out our suite of rock slope stability software, which also includes swedge, rocplane and dips.
The slope stability assessment of the sliding rock wedge in the selected crosssection. The software in general is very good and ties in well with the way we do things here. Deterministic and probabilistic analyses are possible. If a rock block is free to dilate, then the secondorder asperities will have a diminished effect on shear strength. Since then, bruce has undertaken operational supportproject evaluations in a number of open pit. Slope checks a range of slip circles and gives you the option to force slips through a point or. Slope checks a range of slip circles and gives you the option to force slips through a point or keep them tangential to a strata. General purpose re sponse surface as a surrogate model to. Slide2 is simple to use, and yet complex models can be created and analyzed quickly and easily. This essential slope analysis software analyses reinforcing elements such as soil nails, rock bolts, ground anchors and geotextiles to bs8007bs8081. Robust geotechnical design of rock bolts for stability of.
For further advice, contact the team or download a free 30 day trial. The effect of installation angle of rock bolts on the stability of rock. Slope also includes a variably inclined interslice force method which ensures that each slice is in equilibrium, both vertically and horizontally. Flacslope can simulate stability problems under a wide variety of slope conditions, including. Rockpack iii is applicable to practically all rock excavations, including highway roadcuts, quarries, mines, and building excavations. A one stop engineering tool for this problem type, allowing the user to deal with soils and rock. Oasys slope twodimensional slope stability analysis.
Rockpack iii 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. Engineering methods can be used to help prevent slope failure. Stability of rock slopes in many civil engineering projects involves installation of rock bolts for stabilization. The incredible ibex defies gravity and climbs a dam forces of nature with brian cox bbc duration. The fully grouted bolt is a convenient, effective, and economic technology for slope reinforcement. Plaxis software, abaqus software, geoslope software are commercial licence software or in other terms, you have to pay a lot of money for a regular full licence. To study the effect of installation angle of rock bolts on the stability of rock slopes, the slopes in different dips such as 30, 45, 60, and 75 were modeled by phase2 software rocscience, 1999. Rock slope stability analysis utilization of advanced numerical techniques dr.
The analysis of the discontinuities is performed through hierarchical and nonhierarchical clustering procedures, that allow one to identify the joint sets. Roctopple implements eurocode 7 design standards, which allows you to define partial safety factors for different components of the analysis. Methods of reinforcement and monitoring based on the above calculations, the slope stability expert will design the slope angles in order to ensure the desired level of stability. The kinematical, limit equilibrium and numerical analysis were carried out to determine slope stability. Stability analysis of bolts reinforced rock jointed slope. Use in deep excavations and installation methods deepex software can be used for the design of retaining walls supported by tiebacks or rock anchors. Context sensitive rock slope design solutions fhwa us.
The quantitative kinematic analysis, instead of relying on representative values, considers all discontinuities and their. To study the performance of various rock bolts on the displacement of rock slopes, the slopes in different dips such as 15, 30, 45, 60, and 75 were modeled by phase2 software 1 for example, as fig. Slide2 most comprehensive 2d slope stability software. Rock bolts, shotcrete or support pressure can be applied to increase the wedge safety factor. Rs2 can be used for a wide range of engineering projects including excavation design, slope stability, groundwater seepage, probabilistic analysis, consolidation, and dynamic analysis capabilities complex, multistage models can be easily created and quickly analyzed tunnels in weak or.
This program is used to analyze the stability of rock slopes and walls for a. Thus, by increasing the normal force across a shear surface by adding tensioned rock bolts. Analyzing slope stability by the limit equilibrium method provides a pcbased software program for performing slope stability analyses, along with supporting documentation. Rocplane makes it easy to quickly create planar models, visualize them in both 2d and. College of engineering, ahmedabad, india abstractthe slope stability is a very important problem in geotechnical engineering. Pdf robust geotechnical design of rock bolts for stability of rock. Roctopple makes it easy to visualize the slope failure in both 2d and 3d. Slope is an everyday engineering tool which is quick and easy to use for a wide range of slope stability problems. Study of effect of bolt anchorage parameters on rock slope stability. Rocplane is an interactive software tool for performing planar rock slope stability analysis and design. Make sure you understanding the different input parameters between rock slope, soil. The stability of the slope has been affected by crumbling stones, rocklayer slip down, underground water.
Structural supports aim to increase the stability of the slope. Bruce worked in mining operational rock mechanics from 1989, in both hard rock open pit and underground operations, including gold, copper and iron ore, before joining srk in 2002. Swedge is a quick, interactive and simpletouse analysis software tool for evaluating the geometry and stability of surface wedges in rock slopes. Rocplane makes it easy to quickly create planar models, visualize them in both 2d and 3d, and evaluate analysis results. It is developed for stereonetbased analysis as well as a new quantitative kinematic analysis. The diagram shows the values of srf for the slope with dip of 75 degrees and different spacing of rock bolts that were installed at different angles the diagrams in figs. Slope is feature rich and will aid in the assessment of slopes and the design of engineering solutions for slope stability problems. Dowels are used on steep slopes in the same fashion as rock bolts, while shear pins are used on. What is the best software to analyse the slope stability. Flacslope uses the graphical interface and the automatic factorofsafety calculation of flac as the core of a userfriendly code that models slope stability problems unde.
The rockbolting design is based on the deadweight force of falling blocks. Retaining walls, rock bolts, and shotcrete coating of concreterock mixture on slope surface and crevices to prevent water entry are used to inhibit slope failure. The effect of spacing of rock bolts on the stability of. The term landslide refers to a situation of instability affecting natural slopes and involving large. The graphics and the pointandclick data input are also very good and makes the program very easy to use. Wire cables and wire fences minimize the danger of rockfall. Those techniques include the implementation of prestressed anchors, rock bolts, piles, soil nailing, geosynthetic reinforcement, retaining walls, shotcrete, etc. Figure 43 depicts a rock slope stability analysis diagram assuming a tension crack in the slope.
Rs2 2d geotechnical finite element analysis rocscience. The rock slope orientation and the rock mass parameters are also necessary for the evaluation of the safety factors and for the design of the rock bolts. Discontinuities are geologic breaks such as joints, faults, bedding planes, foliation, and shear zones that can. This rock slope above was unstable and a risk to the safety of the occupants of the house on the left of the picture, so ashton bennett undertook a slope stability evaluation and following a negotiated purchase of additional land at the top of the slope, the rock was regraded to a safe angle with rock bolts where necessary and grass seeded netting. Rock slope stability planar shear failure fine software.
Uncertainty in input parameters that determine the stability of rock slopes may lead to uncertainty in evaluating the factor of safety. The most serious disorders which can occur in slopes are 1 the sliding of blocks along the discontinuing surfaces which exist at the opening of trenches and 2 rock falls or sliding of blocks resulting from the rapid change in the mechanical characteristics of the rock bench which supports them. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. Study of effect of bolt anchorage parameters on rock slope stability by. Rock slope stability analysis utilization of advanced. The effect of length of rock bolts on the stability of. Kinematic analysis is a method used to analyze the potential for the various modes of rock slope failures plane, wedge, toppling failures, that occur due to the presence of unfavorably oriented discontinuities figure 1. Given the size of blocks and the maximum lenght for the bolt. In the models, the pattern of parallel deterministic joints was used. Ge, principal consultant with gregory geotechnical gregeo. Different scenarios incorporating or not reinforcement systems surface water drainage, rock mass dewatering, mechanical reinforcement using rock bolts and.
Rock bolt rock bolt wiazco geotechnical op 28 jan 04 19. Rock slope stability planar shear failure this engineering manual describes a slope stability evaluation of an excavation situated next to the road number ii102 strnadystechovice, which is located at the bottom of the vltava river valley. A new nonlinear hoekbrown strength reduction method based on the characteristics of a jointed rock mass is proposed. Leame limit equilibrium analysis of multilayered earthworks is the most recent version of software, previously known as reame rotational equilibrium analysis in multilayered. Is there any free software available for slope stability. Including calculations for bolt diameter, bond length, bolt length, bearing plates, number of bolts for block stabilization. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. Slide2 formerly slide is a 2d slope stability program for evaluating the safety factor or probability of failure, of circular and noncircular failure surfaces in soil or rock slopes. Slope is the perfect choice for anyone who needs fast and e. The aim of the chapter of this engineering manual is to explain a rock slope stability situated in a. Create planar models, visualize them in 2d and 3d, and evaluate results. Designing, constructing and monitoring of slopes in rock mass in.
Flacslope us minneapolis itasca consulting group, inc. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. Slope stability best slope stability analysis software. Every effort must be made to preserve stability for the safety of mining operations. For specific slope, stability analysis can be performer by utilize slide software from rock science or plaxis. Analysis of planar failure stability in the slope stability calculation for planar failure and the wedged failure, shear strength of rock mass is dominant, and it presents the function of discontinuity strength and the paths in intact rock mass that separate the discontinuities arbanas, 2002. The prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity. Rockpack iii rockware rockware geoscientific software. I am seeking an example or reference that goes through the design for a cliff face that needs to be spot stabilized with rock bolts. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. The performance of various rock bolts on the stability of.
Dave2 1pg student 2professor 1,2department of applied mechanics 1,2l. With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. Roctopple is an interactive software tool for performing toppling analysis and support design of rock slopes. Once the geometry of the rock blocks has been identified, the bolt forces necessary.
Part of our geotechnical software range, slope is the perfect choice for anyone who needs fast and effective twodimensional slope stability software. In the models, the pattern of parallel deterministic joints was used in spacing of 2. Rocplane planar wedge analysis for slopes by rocscience. The typical geotechnical rock mass profile of the ter. Design of installed rock bolts must be optimized for safety requirements, cost efficiency and robustness.
Rocplane contains many helpful features that allow users to rapidly build, modify and run models. Flacslope is a special, streamlined version of flac for evaluating the factor of safety fos of soil and rock slopes in two dimensions with simple and fast model setup and analysis execution. Geotechnical engineering software the perfect choice for. With a probabilistic analysis you can take into account variations in material. This essential slope software analyses reinforcing elements such as soil nails, rock bolts, ground anchors and geotextiles to bs8006bs8081. This section examines the use of tiebacks in deep excavation design, as well as, the ground anchor installation methods. Stability of underground structures is critical in underground mining. Designing, constructing and monitoring of slopes in rock. There are a number of techniques available for reinforcing unstable rock masses, of which rock bolting is the most widely used. Rocplane is a software tool for planar rock slope stability analysis and design. The effect of installation angle of rock bolts on the. Rock3d geotechnical design software slope stability. The appropriate bolt spacing is 1 m for 3m long bolts and less than 1. Design and analyze planar rock slopes with rocplane, a quick and easy tool to help you build planar models and visualize them in 2d and 3d.
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