Winner of the standing ovation award for best powerpoint templates from presentations magazine. For an additional 9 years he was a principal advisor to. Unlike traditional methods, cc generates no rebound, reduces the need for line or lane possession and can be installed around sensitive infrastructure. Assuming that the ct saturation will occur for the through fault current then. Inspect periodically to see if rocks have been dislodged. Osha refers to these systems as conventional fall protection. Popularly known as landslides, slope failures describe a wide variety of mechanisms that cause the outward or downward movement of slope forming materials like rock, soil or landfills. Popescu illinois institute of technology, usa, katsuo sasahara kochi university, japan abstract correction of an existing landslide or the prevention of a pending landslide is a function of a reduction in the driving. This broad definition encompasses many and varied applications.
Design of slope protection systems and maintenance procedures to minimize erosion dennis duffy and hilda hatzell effective control of erosion on highway slopes involves assess ing the ero ive environment correctly, predicting the erosfon resistance of materials before u1eir placement or exposure on. Application of slope purpose of stabilizing time available accessibility of the site types of construction equipment, and the cost of repair these methods can be classified into three categories removal and protection drainage of water reinforcement. Native plants provide wildlife habitat, are adapted to our native soils, can adapt better to climate disruptions, and interact with each other in ways hybridexotic plant communities do not. The steepness of the slope will affect the solution chosen.
Types of slope protection solid mechanics mechanical. If so, share your ppt presentation slides online with. Sweets provides slope protection product directories to help you construct any building. On nearvertical slopes where the mesh is sub parallel to the slope and in limited contact, the rockfall trajectory is generally also sub parallel to the slope. Guniting shortcreting application of concrete with force on slopes 1. Lowell washington state department of transportation p.
To stabilize the soil, to reduce raindrop impact, to reduce the. These approaches should not be considered long term permanent. Protection to slope by rigid surface rigid surface protection on slopes are commonly used to reduce rainwater infiltration and to prevent erosion of the slopeforming materials. Impetus to understand analytical methods, investigative tools and stabilization methods. Our erosion slope protection systems provide surface stabilisation alone for geotechnically stable slopes. Functions of slope surface protection and earth retaining wall slope protection structures slope protection structures help to stablise the slope and can last a lifetime in protecting surrounding properties from damage and people from injury if they are maintained in a good and functional condition at all times. Geotropism in vetiver 20 a photo essay of vetiver grass applied to various slope stabilization applications by paul truong, tvni technical director. Water control is generally maintained through installation of surface and subsurface drainage devices within and adjacent to potentially unstable slopes. Some stabilization methods are very expensive and require significant time to. Drainage of water is an effective method of increasing the stability of a slope. Installation of wire mesh on slopes and locking them. Most slope stability analysis computer programs are based on the limit equilibrium concept for a twoor threedimensional model. Ppt slope stability analysis powerpoint presentation. If you have indicators of potentially unstable slopes, call us.
Design of slope protection systems and maintenance. Slope paving covers a variety of methods for paving slopes, including colored slope paving, exposed aggregate slope paving, and slope paving with concrete pavers. Because shotcrete is applied pneumatically, the material is compacted against the surface to fill cracks and fissures and prevent loose material from falling. Selection criteria for slope stabilization methods. Slope face stabilization for critical slope surfaces state of california. These protection methods, however, produce difficult conditions for initially introduced plants to grow. Scaling loose blocks or boulders to be removed from exposed rock surfaces, this is usually done by manual method. The total weight w of the mass above the trial circle acting through the centre of mass. Frictioncircle method the friction circle method of slope analysis is a convenient approach for both graphical and mathematical solutions.
In the rollout presentation of the riprap design standard, chapter 7, bobby rinehart of. Because of the intense urban development, a large number of manmade slopes are formed on hillsides in. Oct 20, 2015 vegetation trees, shrubs, grasses, flower and ground covers helps stabilize slopes in numerous ways. Summary of slope treatment methods for stabilization treatment conditions general purpose preventive or remedial change slope geometry reduce height rotational slides preventtreat during early stages reduce inclination all soilrock preventtreat during early stages add weight to toe soils treat during early stages control surface water. Temporary slope protection method for shallow or surficial. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Information includes slope stability analysis methods, calculations, illustrations, slope improvement methods, slope stabilization, method of circles, wedge method, bishop, slope mitigation, bearing capacity, foundations, shallow foundations, deep. Properly designed slope protection and stabilization has to include two components. Cc can be laid up to 10 times faster than conventional concrete solutions, reducing time on site and asset closures. Temporary slope protection method for shallow or surficial failures. Theory of slope stability portland state university. Slope stability publications, software and technical guidance for the career development, information, and resources for geotechnical engineers.
Alternative slope protection methods, mentions some alternative methods and references. A perfect comprehensive presentation which covers different slope protection method in hard surfaces as well as smooth surface. Slope protection products construction materials sweets. The weight of the structure itself called dead load. Stabilize the upper soil layer on embankments with the 3d geoweb slope protection system to resist sliding, prevent severe erosion caused by surface runoff, and allow steeper slopes to be built. Slope failures are essentially natural hazards that occur in many areas over the world. Three site conditions should be considered when choosing an appropriate method for stabilizing a slope. Deep slope erosion control and embankment stabilization. Paul guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure. This is important because as the slope becomes saturated with water, its strength and stability. Protect geomembranes on dams, landfills, and containment basins with the industrys only complete geocell solution featuring the tendon and. Chunam plastering this is an appliedon surface protection to slope using a clay and cement mixed plaster.
Reinforced soil slopes and embankments for the purposes of this document, a reinforced slope is defined as a compacted fill embankment that incorporates the use of horizontally placed geosynthetic reinforcement to enhance the stability of the soil structure. A simple method to increase slope stability is to increase the weight of the. Among slope protection methods applied in the past to this type of slope are. The actual load imparted is a function of the mass and velocity of the block and the manner in and orientation at which the block impacts the system. A system of permanent design measures used alone or in combination to minimize erosion from disturbed surfaces. Type of slope failure type of soil presence of groundwater poor drainage slope failure is generally classified as either a rotational slide or a surficial soil creep failure. By using well established biotechnical slope protection principles in conjunction with improved erosion control products, erosion control and slope surface stability can be significantly enhanced. Landslide disaster prevention and mitigation through works. Engineering measures for landslide disaster mitigation. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated h height of the overall slope or of each bench 60 m or 20 m respectively. This chapter provides further discussion and explanation related to stability of slope. Analysis of infinite slope with completely submerged slope if the slope is completely submerged, and if there is no seepage as in fig.
Geotechnically unstable slopes will require additional retention systems or soil nailing to be used in conjunction with our erosion protection solutions. The primary purpose of riprap or other slope protection elements on the upstream slope of an embankment dam is to prevent erosion and damage to the design standard no. Design guidelines for wire meshcable net slope protection. Protection and treatment to rock slope most rock slopes need some forms of treatment to ensure continued stability.
Shotcrete figures prominently among several methods for slope stabilization due to its versatility, durability, early resistance and its capacity to adhere to adherence to the subtract. Reducing the driving forces and increasing the resisting forces. Other systems and methods of fall protection may be used when performing certain activities. Vegetation has a great importance in erosion control and slope stabilisation, protecting and restraining the soil at the surface and increasing the strength and competence of the soil mass at depth. Removal and protection drainage of water reinforcement. What are the different types of slope protection measures in. Types of slope protection free download as powerpoint presentation. Guidelines for the construction of earthfill dams november 2008 1 1. Vegetation trees, shrubs, grasses, flower and ground covers helps stabilize slopes in numerous ways. Generally, fall protection can be provided through the use of guardrail systems, safety net systems, or personal fall arrest systems. To evaluate the effect of plant roots on soil shear strength, it is necessary to quantify the biotechnical and mechanical properties of the roots. Introduction to slope stability and protection course no. An introduction to slope stability and protection j.
Gandhinagar institute of technology presentation on slope protection works civil engineering department presented by. Popescu illinois institute of technology, usa, katsuo sasahara kochi university, japan abstract correction of an existing landslide or the prevention of a pending landslide is a function of a reduction in the driving forces or an increase in the available resisting forces. Hattamleh department of civil and environmental engineering washington state university pullman, washington 991642910 thomas c. Chapter 15 1 slope stability ppt download slideplayer. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. 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. Failure modes in rock and soil slopes slope failure. This user guide provides simple, costeffective methods for stabilizing locally maintained slopes along roadways in minnesota. Hong kong has a hilly terrain with little flat land. Slope protection maccaferri philippines maccaferri. Types of slope protection solid mechanics mechanical engineering. On rock slopes, where loss of rock fragments from the face is the prime concern, our macro.
The centrifugal forces developed by moving vehicles on. Ppt slope stability analysis powerpoint presentation free. Gabions consists of placing wire mesh boxshaped baskets filled onsite with hard, durable rocks sackedconcrete slope protection used when a number of serious failures have occurred. Conventional methods of slope stability analysis can be divided into three groups.
Engineering measures for landslide disaster mitigation mihail e. How does the slope angle play a role in slope stability. Slope stability technical guidance on the geotechnical. For maximum effect, both components must be integrally planned prior to road construction. Slope protection structures help to stablise the slope and can last a lifetime in protecting surrounding properties from damage and people from injury if they are maintained in a good and functional condition at all times. This guide is based on information provided in slope stabilization and repair solutions for local government engineers, which presents the results of a minnesota department of transportation mndot research project on slope stabilization methods. The second bias slope is intended to ensure additional restraint with severe through fault currents that could lead to ct saturation. What are the different types of slope protection measures. The maximum recommended slope of a randomplaced armor stone revetment is 1.
Lecture capture on slope stability, ordinary method of slices and modified simplified bishops method. What are the different types of slope protection measures in soil. Slope stability united states army corps of engineers. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. The erosion mats, biodegradable biomac and the permanent mat macmat provide costeffective methods of retaining both soil and moisture on the slope, thereby promoting sustainable vegetation for longterm erosion protection. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. Design of slope protection systems and maintenance procedures to minimize erosion.
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 weight and dynamic effect of moving load called live load. Purpose to protect the soil surface from erosive forces andor improve the stability of soil slopes that are subject to seepage or have poor soil structure. Check and analyze the stability of slopes using various method of analysis and propose the best solution to the problem given. How do friction and cohesion work together to stabilize slopes. Design guidelines for wire meshcable net slope protection balasingam muhunthan shanzhi shu navaratnarajah sasiharan omar a. Landslide can result either from rock failure or soil failure. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Design of slope protection systems and maintenance procedures. The main objective of these methods is to reduce the amount of water flowing onto the ground surface in the area of the slide by using a system of plastic sheets and sandbags.
Where possible, revetment slopes should be selected to match the existing bluffbank slopes stable angle of repose. Slope stability analysis is the property of its rightful owner. Rock slope protection should be implemented only when hydrologic conditions prohibit. Department of the interior bureau of reclamation december 2012. Installation of wire mesh on slopes and locking them together. End hydraulic problems hydraulic problems highway bridges, designed to resist loads brought by. Mar 21, 2016 analysis of infinite slope with completely submerged slope if the slope is completely submerged, and if there is no seepage as in fig. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Protection to slope by rigid surface rigid surface protection on slopes are commonly used to reduce rainwater infiltration and to prevent erosion of the slope forming materials. Introduction to landslide stabilization and mitigation. Most rock slopes need some forms of treatment to ensure continued stability.
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