Chapter 630 Geosynthetics
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GEOSYNTHETICS Our Solutions for the Infrastructure in Mining
GEOSYNTHETICS Our solutions for the infrastructure in mining Protective Fabrics Geosynthetics Outdoor Fabrics Grass Advanced Composites Advanced Armour OUR ECONOMIC SOLUTIONS FOR THE MINING INDUSTRY TenCate Bidim® S TenCate Polyfelt® TS TenCate Rock® PEC TenCate Miragrid GX TenCate Geosynthetics offers efficient and economical solutions which cover different applications: PORT EXPANSION ROADS & RAILROAD TRACKS DUMPWALL 2 OUR ECONOMIC SOLUTIONS FOR THE MINING INDUSTRY TenCate Geolon® PET TenCate Geolon® PP TenCate Bidim® AR TenCate GeoDetect® S-BR WORKING PLATFORMS TAILING PONDS 3 HAUL ROADS AND WORKING PLATFORMS Your quick and safe access to the mine Access roads, railway tracks and platforms are crucial for the Separation mining activities as all heavy plant and machinery are required Geosynthetics prevent upper granular layers to access the mine. penetrating soft subgrades beneath, so Geosynthetics from TenCate have been used over 40 years to reducing the amount of granular material stabilise temporary and permanent road constructions, required to stabilize a structure. showing significant benefits: • Cost saving and lower environmental impact by the Our solutions: reduction of granular layer thickness to stabilize the TenCate Bidim® S and TenCate Polyfelt® TS platform • No mixing between the granular materials of the road Filtration construction and the subgrade leading to an improved When used as filters, geotextiles permit the bearing capacity and performance free flow of water from a soil mass, while • Stronger platforms over time due to the reinforcement. inhibiting fine particle movement from the soil, thus stabilising the overall structure. TenCate Geosynthetics offer a complete range of products and solutions to fulfil the different functions involved in the Our solutions: construction of trafficked areas. -
REDUCED DIG' INSTALLATION GUIDANCE Gravel & Grassed Surfaces
® BODPAVE 85 PAVING GRIDS Data Sheet No : SDI / B85PRD09 Issue 2 'REDUCED DIG' INSTALLATION GUIDANCE Gravel & Grassed Surfaces The ‘Reduced Dig’ method of installation for BodPave ®85 is suitable for pedestrian and light vehicle applications where firm ground conditions already exist. It is particularly advantageous where there are budgetary limitations, restrictions on excavation due to SSSI conservation and archeological issues or Tree Preservation Orders (TPO). BENEFITS OF REDUCED DIG APPLICATIONS Minimal site preparation or variation to existing levels Light vehicle parking and access routes Reduced installation time and costs Pedestrian access & Cycle routes Reduced import of materials and disposal of debris Tree root protection Rapid establishment and usage of site after installation Golf buggy paths and Tow paths Compliant with current guidance for Sustainable Caravan and Leisure site access routes Urban Drainage Systems (SUDS) Wheelchair and disabled access (DDA compliant) Suitable for grass or gravel surfaces Light aircraft parking and taxiways SITE SUITABILITY BodPave ®85 Where existing ground with Grass or Gravel conditions are firm Sand : Soil (ie: CBR > 7%) Rootzone or BGT100 Gravel Bedding and free draining upper Geotextile filter or where a suitable fabric option hardcore/stone base already exists. DoT (GSB) ‘Type 1’ or reduced fines Where trafficking is ‘Type 3’ Sub-base irregular or occasional Where loads will not Tensar TriAx ™ exceed that of cars TX160 geogrid BGT100 and light vans option Lower Geotextile layer option -
Mechanically Stabilized Embankments
Part 8 MECHANICALLY STABILIZED EMBANKMENTS First Reinforced Earth wall in USA -1969 Mechanically Stabilized Embankments (MSEs) utilize tensile reinforcement in many different forms: from galvanized metal strips or ribbons, to HDPE geotextile mats, like that shown above. This reinforcement increases the shear strength and bearing capacity of the backfill. Reinforced Earth wall on US 50 Geotextiles can be layered in compacted fill embankments to engender additional shear strength. Face wrapping allows slopes steeper than 1:1 to be constructed with relative ease A variety of facing elements may be used with MSEs. The above photo illustrates the use of hay bales while that at left uses galvanized welded wire mesh HDPE geotextiles can be used as wrapping elements, as shown at left above, or attached to conventional gravity retention elements, such as rock-filled gabion baskets, sketched at right. Welded wire mesh walls are constructed using the same design methodology for MSE structures, but use galvanized wire mesh as the geotextile 45 degree embankment slope along San Pedro Boulevard in San Rafael, CA Geotextile soil reinforcement allows almost unlimited latitude in designing earth support systems with minimal corridor disturbance and right-of-way impact MSEs also allow roads to be constructed in steep terrain with a minimal corridor of disturbance as compared to using conventional 2:1 cut and fill slopes • Geotextile grids can be combined with low strength soils to engender additional shear strength; greatly enhancing repair options when space is tight Geotextile tensile soil reinforcement can also be applied to landslide repairs, allowing selective reinforcement of limited zones, as sketch below left • Short strips, or “false layers” of geotextiles can be incorporated between reinforcement layers of mechanically stabilized embankments (MSE) to restrict slope raveling and erosion • Section through a MSE embankment with a 1:1 (45 degree) finish face inclination. -
Technical Supplement 14D--Geosynthetics in Stream Restoration
Technical Geosynthetics in Stream Restoration Supplement 14D (210–VI–NEH, August 2007) Technical Supplement 14D Geosynthetics in Stream Restoration Part 654 National Engineering Handbook Issued August 2007 Cover photo: Inert or manmade materials can be used in restoration de- signs where immediate stability is required and can be used in concert with vegetation. Advisory Note Techniques and approaches contained in this handbook are not all-inclusive, nor universally applicable. Designing stream restorations requires appropriate training and experience, especially to identify conditions where various approaches, tools, and techniques are most applicable, as well as their limitations for design. Note also that prod- uct names are included only to show type and availability and do not constitute endorsement for their specific use. (210–VI–NEH, August 2007) Technical Geosynthetics in Stream Restoration Supplement 14D Contents Purpose TS14D–1 Introduction TS14D–1 Materials TS14D–1 Geotextile ....................................................................................................... TS14D–1 Geogrid ........................................................................................................... TS14D–1 Geonet ............................................................................................................ TS14D–2 Geocell ........................................................................................................... TS14D–2 Rolled erosion control products ................................................................ -
Promoting Geosynthetics Use on Federal Lands Highway Projects
Promoting Geosynthetics Use on Federal Lands Highway Projects Publication No. FHWA-CFL/TD-06-009 December 2006 Central Federal Lands Highway Division 12300 West Dakota Avenue Lakewood, CO 80228 FOREWORD The Federal Lands Highway (FLH) of the Federal Highway Administration (FHWA) promotes development and deployment of applied research and technology applicable to solving transportation related issues on Federal Lands. The FLH provides technology delivery, innovative solutions, recommended best practices, and related information and knowledge sharing to Federal agencies, Tribal governments, and other offices within the FHWA. The objective of this study was to provide guidance and recommendations on the potential of systematically including geosynthetics in highway construction projects by the FLH and their client agencies. The study included a literature search of existing· design guidelines and published work on a range of applications that use geosynthetics. These included mechanically stabilized earth walls, reinforced soil slopes, base reinforcement, pavements, and various road applications. A survey of personnel from the FLH and its client agencies was performed to determine the current level of geosynthetic use in their practice. Based on the literature review and survey results, recommendations for possible wider use of geosynthetics in the FLH projects are made and prioritized. These include updates to current geosynthetic specifications, the offering of training programs, development of analysis tools that focus on applications of interest to the FLH, and further studies to promote the improvement of nascent or existin esign methods. Notice This document is disseminated under the sponsorship of the U.S. Department of Transportation (DOT) in the interest of information exchange. The U.S. -
Performance of Nonwoven Geotextiles on Soil Drainage and Filtration Nour-Eddine Sabiri, Adeline Caylet, Agnès Montillet, Laurence Le Coq, Yves Durkheim
Performance of nonwoven geotextiles on soil drainage and filtration Nour-Eddine Sabiri, Adeline Caylet, Agnès Montillet, Laurence Le Coq, Yves Durkheim To cite this version: Nour-Eddine Sabiri, Adeline Caylet, Agnès Montillet, Laurence Le Coq, Yves Durkheim. Performance of nonwoven geotextiles on soil drainage and filtration. European Journal of Environmental and Civil Engineering, Taylor & Francis, 2017, 10.1080/19648189.2017.1415982. hal-01741182 HAL Id: hal-01741182 https://hal.archives-ouvertes.fr/hal-01741182 Submitted on 21 Aug 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Performance of nonwoven geotextiles on soil drainage and filtration Nour-Eddine Sabiria, Adeline Cayleta,b, Agnès Montilleta, Laurence Le Coqa and Yves Durkheimc auniversité de nantes, gEpEa, umr-CnrS 6144, nantes, france; buniversité de Bretagne Sud, frE CnrS 3744, irdl, pontivy, france; cafitEX, Champhol, france ABSTRACT The selection of a geotextile to prevent the soil suffusion in a civil engineering ARTICLE HISTORY work is a classical problem. The internal erosion is a key factor as the migration received 8 march 2017 of fine particles damages the integrity of the soil structure. This work deals accepted 6 december 2017 with the problem of using a draining system consisting of a layer of soil and a KEYWORDS geotextile sheet in order to prevent soil suffusion. -
Downloaded from the Online Library of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)
INTERNATIONAL SOCIETY FOR SOIL MECHANICS AND GEOTECHNICAL ENGINEERING This paper was downloaded from the Online Library of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). The library is available here: https://www.issmge.org/publications/online-library This is an open-access database that archives thousands of papers published under the Auspices of the ISSMGE and maintained by the Innovation and Development Committee of ISSMGE. Localized mobilization of geotextile reinforcement force at failure surface Mobilisation localisee de la force de renforcement du geotextile en surface de rupture P.V. Long, D.T. Bergado & A. S. Balasubramaniam - School o i C ivil Engineering, Asian Institute of Technology (AIT), Bangkok, Thailand P. Delmas - Bidim, France ABSTRACT: The orientation and magnitude of geotextile reinforcement force associated with slip failure are the key parameters affecting on the stability analyses of reinforced embankments. Presently, these parameters have been selected arbitrarily and even independently. The large direct shear tests with inclined geotextile reinforcements as well as the finite element modelling for reinforced- soil mass that simulate the actual conditions of slip failure in the field have been conducted for investigating the relationship between the inclination factor, the reinforcement stiffness, and the localized mobilization of reinforcement strain during shear. The orientation and magnitude of reinforcement force can then be estimated from this relation. 1 INTRODUCTION inside dimensions of 930 mm in length by 580 mm in width and Limit equilibrium analyses with circular slip surfaces have 560 mm in height. The compaction was done with 150 mm lift been commonly used in conventional design of geotextile at moisture content of 13 % and dry density of 17 kN/m3 reinforced embankments on soft ground. -
Geosynthetic Reinforced Steep Slopes: Current Technology in the United States
applied sciences Review Geosynthetic Reinforced Steep Slopes: Current Technology in the United States Yoo-Jae Kim 1,*, Ashley Russell Kotwal 1, Bum-Yean Cho 2, James Wilde 1 and Byung Hee You 1 1 Department of Engineering Technology, Materials Science, Engineering, and Commercialization Program, Texas State University, 601 University Drive, San Marcos, TX 78666, USA; [email protected] (A.R.K.); [email protected] (J.W.); [email protected] (B.H.Y.) 2 Department of Fire Safety Research, Korea Institute of Civil Engineering and Building Technology, 64 Ma-doro 182beon-gil, Mado-myeon, Hwaseong-si, Gyeonggi-do 18544, Korea; [email protected] * Correspondence: [email protected]; Tel.: +1-512-245-6309 Received: 5 April 2019; Accepted: 13 May 2019; Published: 16 May 2019 Abstract: Geosynthetics is a crucial mechanism in which the earth structures can be mechanically stabilized through strength enforcing tensile reinforcement. Moreover, geosynthetic reinforcement stabilizes steep slopes through incorporating the polymeric materials, becoming one of the most cost-effective methods in not only accommodating budgetary restrictions but also alleviating space constraints. In order to explicate on the applicability and widen the understanding of geosynthetic reinforcement technology, a synthesis study was conducted on geosynthetic reinforced steep slope. This study is very important because in not only highlighting the advantages and limitations of using geosynthetic reinforcement but also in investigating the current construction and design methods with a view to determining which best practices can be employed. Furthermore, this study also identified and assessed the optimal condition of the soil, performance measures, construction specifications, design criteria, and geometry of the slope. -
Geotextile Filter Design, Application, and Product Selection Guide
geotextile filter design, application, and product selection guide Marine & Transportation Engineering GEOTEXTILE FILTER DESIGN, APPLICATION, AND PRODUCT SELECTION GUIDE Drainage and Erosion Control Applications TABLE OF Introduction and Explanation of the Problem ....................................... 1 CONTENTS The Mirafi® Solution ...................................................................... 1 Systematic Design Approach .......................................................... 2 Step One: Application Filter Requirements ................................................ 3 Step Two: Boundary Conditions ............................................................. 3 Step Three: Soil Retention Requirements .................................................... 4 Step Four: Geotextile Permeability Requirements ........................................ 5 Step Five: Anti-Clogging Requirements .................................................... 6 Step Six: Survivability Requirements ..................................................... 7 Step Seven: Durability Requirements ......................................................... 7 Geotextile Filter Selection Guide ...................................................... 8 Geotextile Filter Minimum Average Physical Properties Chart ........................................................ 10 INTRODUCTION Drainage Aggregate trench and blanket drains are commonly used to drain water from AND EXPLANATION OF surrounding soils or waste materials. These drains are typically installed less than -
Application of Geosynthetics for Ground Improvement: an Overview
Application of Geosynthetics for Ground Improvement: An Overview IGC 2009, Guntur, INDIA APPLICATION OF GEOSYNTHETICS FOR GROUND IMPROVEMENT: AN OVERVIEW Gohil D.P. Research Scholar, Department of Applied Mechanics, S.V. National Institute of Technology, Surat–395007, India. E-mail : [email protected] C.H. Solanki Assistant Professor, Department of Applied Mechanics, S.V. National Institute of Technology, Surat–395007, India. E-mail : [email protected] A.K. Desai Assistant Professor, Department of Applied Mechanics, S.V. National Institute of Technology, Surat–395007, India. E-mail: [email protected] ABSTRACT: Geosynthetics is manmade material used for soil reinforcement. Soil transfers the built up forces in earth to reinforcement by friction which develops tension in reinforcement. Geosynthetics is used in locations where shear stresses are generated because shearing stress between soil and reinforcement restrains the lateral deformation of the soil. Geosynthetics used for increasing bearing capacity and permeability of soil, reducing settlement of soil. Under dynamic shear excitations, slip deformations occur along smooth geosynthetic interfaces. Thus, in a landfill application seismically induced slip deformations along a bottom geosynthetic liner can result in reduced accelerations transmitted to landfill waste. Preliminary shaking table test on smooth high density polyethylene and geotextile showed that this concept of using geosynthetics to isolate a structure from incoming seismic waves had great promise. Shaking table tests of a building model placed on a selected geosynthetic liner results the benefits of utilizing a special geosynthetics liner as an energy absorbing system that can reduce building response during an earthquake. Displacement transducers are use to measure the slip along the geotextile interface and to measure the distortion of the columns of the building model. -
Application of Eco-Friendly Geotextiles for Landslide Mitigation in a Part of Ooty Hills, Tamil Nadu
International Journal of Modern Engineering Research (IJMER) www.ijmer.com Vol.2, Issue.3, May-June 2012 pp-579-585 ISSN: 2249-6645 Application of Eco-Friendly Geotextiles for Landslide Mitigation in a Part of Ooty Hills, Tamil Nadu T. SUBRAMANI Dean & Professor, Department of Civil Engineering, V.M.K.V.Engineering college, Vinayaka Missions University, Salem. Tamilnadu. ABSTRACT Defined as the movement of a mass of rock debris, or earth Landslide is one of the major natural hazards the down the slopes (Cruden, 1991). The term „Landslide‟ world is facing. It happens as a result of both man-made encompasses events such as ground movement, rock falls, and as well as natural factors. It causes severe effects on the failures of slopes, topples, slides, spreads, and flows such as environment as well as for the mankind. The main debris flows, mudflows or mudslides (Varnes, 1996). They triggering factors of landslide are rainfall/snowfall, often take place in conjunction with earthquakes, floods and tectonic activities and human activities. There are many volcanic eruption. methods adopted for controlling landslides. The study was carried out to know the application of geotextiles in TYPES OF LANDSLIDES slope stabilization. Ooty is one of the main areas in India The various types of landslides can be differentiated which is prone to landslides. Many loose their life, by the kinds of material involved and the mode of movement. property etc due to landslides every year. The present Other classification systems incorporate additional variables, study attempted in Kattery watershed. Various thematic such as the rate of movement and the water, air, or ice content maps pertaining to landslide hazard studies were of the landslide material. -
Leca Geotechnical Catalog
e o t s e U d l i a u c a i g c l n e a h L c c i e n t h o c e e G T Geotechnics Strong Solutions With Leca Expanded Clay 1 THE MAIN BENEFITS OF LECA® IN GEOTECHNICAL APPLICATIONS ARE Low bulk density High insulation capacity Excellent drainage properties Non combustible Resistance to heat and frost Low capillarity Easy to spread and compact Large load bearing capacity Deformation resistance Inert and chemically neutral Resistant to fungus, rot, insect and pest Constant and high quality of the lightweight material Low transportation costs Geotechnical description Grain size Light Expanded Clay Aggregate is produced in form of a round shaped brown pellets with a resistant exterior skin and a porous and lightweight interior nucleus. The optimum grain size distribution can be cut out in function of the specific application. The grading of LECA® for most geotechnical applications is 10-25 or 0-25 mm. Density LECA® loose dry density ranges between 250 Kg/m3 in function of the grain size distribution. Resistance Like all the other granular loose material, LECA® offers a frictional resistance without any cohesion. The internal friction angle is very high (42° -standard tri-axial test) and the stiffness measured on load plate test is exceptional for a lightweight material. Thermal conductivity The practical thermal conductivity may vary between 0. 09 W/MK, depending on grain size, compaction, humidity level and type of technical solution. Durability LECA® is totally inert. It contains no harmful substances or gases and is absolutely neutral.