The effect of installation angle of rock bolts on the. Rock slope stability analysis utilization of advanced numerical techniques dr. Slope is an everyday engineering tool which is quick and easy to use for a wide range of slope stability problems. With the exception of the pile bearing capacity module, all modules can perform deterministic analyses as well as a probabilistic analyses. 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. Designing, constructing and monitoring of slopes in rock. Deterministic and probabilistic analyses are possible. Structural supports aim to increase the stability of the slope. 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. 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. Figure 43 depicts a rock slope stability analysis diagram assuming a tension crack in the slope. This program is used to analyze the stability of rock slopes and walls for a.
This section examines the use of tiebacks in deep excavation design, as well as, the ground anchor installation methods. Dowels are used on steep slopes in the same fashion as rock bolts, while shear pins are used on. General purpose re sponse surface as a surrogate model to. Swedge is a quick, interactive and simpletouse analysis software tool for evaluating the geometry and stability of surface wedges in rock slopes. In the models, the pattern of parallel deterministic joints was used in spacing of 2 meters.
The prokon geotechnical analysis suite comprises a number of modules for analysis stability and determining capacity. There are a number of techniques available for reinforcing unstable rock masses, of which rock bolting is the most widely used. Given the size of blocks and the maximum lenght for the bolt. In the models, the pattern of parallel deterministic joints was used in spacing of 2. Slide2 most comprehensive 2d slope stability software. The stability of the slope has been affected by crumbling stones, rocklayer slip down, underground water. Stability of rock slopes in many civil engineering projects involves installation of rock bolts for stabilization. Rs2 2d geotechnical finite element analysis rocscience. Thus, by increasing the normal force across a shear surface by adding tensioned rock bolts. Rock stability is a tool for rock slope stability analyses planar, polygonal slip surface. Rockpack iii rockware rockware geoscientific software.
Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. With a probabilistic analysis you can take into account variations in material. Slope stability analysis geostru software provider for. Discontinuities are geologic breaks such as joints, faults, bedding planes, foliation, and shear zones that can. Analyzing slope stability by the limit equilibrium method provides a pcbased software program for performing slope stability analyses, along with supporting documentation. 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 term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. Rocplane is a software tool for planar rock slope stability analysis and design. The typical geotechnical rock mass profile of the ter. Rocplane is an interactive software tool for performing planar rock slope stability analysis and design. For further advice, contact the team or download a free 30 day trial. The software in general is very good and ties in well with the way we do things here.
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. Slope is the perfect choice for anyone who needs fast and e. A wide variety of rock bolt for slope stability options are available to. Slope stability best slope stability analysis software. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. The aim of the chapter of this engineering manual is to explain a rock slope stability situated in a. The effect of spacing of rock bolts on the stability of.
Those techniques include the implementation of prestressed anchors, rock bolts, piles, soil nailing, geosynthetic reinforcement, retaining walls, shotcrete, etc. In the models, the pattern of parallel deterministic joints was used. 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. Roctopple is an interactive software tool for performing toppling analysis and support design of rock slopes. Rock3d geotechnical design software slope stability. The quantitative kinematic analysis, instead of relying on representative values, considers all discontinuities and their. Slope also includes a variably inclined interslice force method which ensures that each slice is in equilibrium, both vertically and horizontally. Rockpack iii is applicable to practically all rock excavations, including highway roadcuts, quarries, mines, and building excavations. 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. Once the geometry of the rock blocks has been identified, the bolt forces necessary. This essential slope analysis software analyses reinforcing elements such as soil nails, rock bolts, ground anchors and geotextiles to bs8007bs8081. The rockbolting design is based on the deadweight force of falling blocks. The effect of installation angle of rock bolts on the stability of rock. The term landslide refers to a situation of instability affecting natural slopes and involving large.
Slope is feature rich and will aid in the assessment of slopes and the design of engineering solutions for slope stability problems. What is the best software to analyse the slope stability. 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. 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. 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. 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. Rs2 formerly rs 2 or phase 2 is a powerful 2d finite element program for soil and rock applications. 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. 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. Slide2 is simple to use, and yet complex models can be created and analyzed quickly and easily.
Pdf robust geotechnical design of rock bolts for stability of rock. Roctopple rounds out our suite of rock slope stability software, which also includes swedge, rocplane and dips. The appropriate bolt spacing is 1 m for 3m long bolts and less than 1. The performance of various rock bolts on the stability of. Rocplane planar wedge analysis for slopes by rocscience.
Roctopple makes it easy to visualize the slope failure in both 2d and 3d. Study of effect of bolt anchorage parameters on rock slope stability. Ge, principal consultant with gregory geotechnical gregeo. Geotechnical engineering software the perfect choice for. A new nonlinear hoekbrown strength reduction method based on the characteristics of a jointed rock mass is proposed. Uncertainty in input parameters that determine the stability of rock slopes may lead to uncertainty in evaluating the factor of safety. This essential slope software analyses reinforcing elements such as soil nails, rock bolts, ground anchors and geotextiles to bs8006bs8081. Rocplane contains many helpful features that allow users to rapidly build, modify and run models. Design of installed rock bolts must be optimized for safety requirements, cost efficiency and robustness. Study of effect of bolt anchorage parameters on rock slope stability by. The slope stability assessment of the sliding rock wedge in the selected crosssection. The fully grouted bolt is a convenient, effective, and economic technology for slope reinforcement. Engineering methods can be used to help prevent slope failure. If a rock block is free to dilate, then the secondorder asperities will have a diminished effect on shear strength.
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. Every effort must be made to preserve stability for the safety of mining operations. The analysis of the discontinuities is performed through hierarchical and nonhierarchical clustering procedures, that allow one to identify the joint sets. 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. Different scenarios incorporating or not reinforcement systems surface water drainage, rock mass dewatering, mechanical reinforcement using rock bolts and. Since then, bruce has undertaken operational supportproject evaluations in a number of open pit. Make sure you understanding the different input parameters between rock slope, soil. The graphics and the pointandclick data input are also very good and makes the program very easy to use. 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. External loading, groundwater and support can all be modeled in a variety of ways.
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. Leame limit equilibrium analysis of multilayered earthworks is the most recent version of software, previously known as reame rotational equilibrium analysis in multilayered. Designing, constructing and monitoring of slopes in rock mass in. Slopew is the leading slope stability software for soil and rock slopes. Robust geotechnical design of rock bolts for stability of. The extensive rock anchor programme undertaken as part of the rock slope stability required the formation of double corrosion protected permanent.
Oasys slope twodimensional slope stability analysis. 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 bolt rock bolt wiazco geotechnical op 28 jan 04 19. Stability of underground structures is critical in underground mining. Create planar models, visualize them in 2d and 3d, and evaluate results. It is developed for stereonetbased analysis as well as a new quantitative kinematic analysis. Including calculations for bolt diameter, bond length, bolt length, bearing plates, number of bolts for block stabilization. Rock slope stability analysis utilization of advanced. 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. 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.
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. Rocplane makes it easy to quickly create planar models, visualize them in both 2d and 3d, and evaluate analysis results. Stability analysis of bolts reinforced rock jointed slope. Wire cables and wire fences minimize the danger of rockfall. The effect of length of rock bolts on the stability of. Rock slope stability planar shear failure fine software.
Slope checks a range of slip circles and gives you the option to force slips through a point or. Rock bolts, shotcrete or support pressure can be applied to increase the wedge safety factor. Flacslope us minneapolis itasca consulting group, inc. Context sensitive rock slope design solutions fhwa us. You can specify water pressure, material shear strength, surface loads and horizontal ground acceleration. Dave2 1pg student 2professor 1,2department of applied mechanics 1,2l. Use in deep excavations and installation methods deepex software can be used for the design of retaining walls supported by tiebacks or rock anchors. Part of our geotechnical software range, slope is the perfect choice for anyone who needs fast and effective twodimensional slope stability software. The principle is that the bolt spacing guarantees that the rockbolts interact with each other. The incredible ibex defies gravity and climbs a dam forces of nature with brian cox bbc duration.
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