Filters in Geotechnical and Hydraulic Engineering

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1 PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE "GEO-FILTERS" KARLSRUHE / GERMANY / OCTOBER 1992 Filters in Geotechnical and Hydraulic Engineering Edited by J. BRAUNS & U. SCHULER Institute of Soil Mechanics and Rock Mechanics, University of Karlsruhe, Germany M.HEIBAUM Federal Waterways Engineering and Research Institute, Karlsruhe, Germany A. A. B ALKEMA / ROTTERDAM / BROOKFIELD / 1993

2 Filters in Geotechnical and Hydraulic Engineering, Brauns, Heibaum & Schuler (eds) 1993Balkema, Rotterdam, ISBN Table of contents Preface Organization IX XI 1 Geometrical design Behaviour of coarse and well-graded filters 3 U. Schuler & J. Brauns Research needs in geotextile filter design 19 B.R.Christopher, R.D.Holtz & G.R.Fischer Geotextile filter design based on the filtration opening size obtained by hydrodynamic sieving 27 J.Mlynarek, J.Lafleur, ARollin & G. Lombard Reliability study of granular filters 35 KJ.Witt Experimental determination of void size curves 43 M.H.A.S6ria, R.T.Aramaki & E.Viviani Void characteristics and filter performances of cohesionless soils 49 BAberg Filtration processes observed with y-ray density meter 57 Y.Okita & M.Nishigaki On particle migration with the help of grading entropy 63 J.Lorincz On granular filters with the help of grading entropy 67 J.Lorincz A method for determining the void size distribution curve for filter materials 71 ASilveira Some advances in the geometric-probabilistic method for filter design 75 F.Federico & AMusso A critical review of geotextile pore size measurement methods 83 G.R.Fischer, R.D.Holtz & B.R.Christopher

3 A simple approach to the design of mineral and textile filters 91 H.Schulz Filter criteria for well graded cohesionless soils 97 J.Lafleur, J.Mlynarek &AL.Rollin Piping stability in the filter material of rock-fill dams 107 Y.Myogahara, T.Sueoka, S.Morita & H.Kuroki Comparison of existing granular filter criteria 113 Ch.Batereau A contribution to the improvement of dimensioning analogies for grain filters and geotextile 121 filters G.Heerten Investigation and application of granular and geotextile filters 129 P.Peter Summary of discussions on the session 'Geometrical design' Hydraulic design and clogging Design of geometrically open filters in hydraulic structures 143 M.B.de Groot, KJ.Bakker & HJ.Verheij Numerical modelling of water-filter interaction under waves 155 W.Magda & W.Richwien Point of view regarding the geotextile filtering protections applied to clayey media 165 LKellner, S.Matei & ASavin The influence of external parameters on the determination of hydraulic characteristics 173 of geotextile filters D.Cazzuffi, AMazzucato & N.Moraci The description of a filter process as a two-phase flow 181 M.A. Koenders, H. S. Patel & A F.Williams A transport model for filtration: Control of erosion processes 189 H. den Adel & K.J. Bakker Clogging of the drainage blanket in landfills 197 G.F.Mitchell, S.M.Sargand & J.Rueda Geotextile filter behaviour with critical filtration conditions 209 Y.H.Faure, AElamir, B.Farkouh, P.Gendrin & P.Reisinger Filtration criteria for cohesive soil geotextile systems 217 E.Guler The influence of hydraulic head and hydraulic gradient on the filtration process 225 H.-J. Kohler Erosion resistance of widely graded cohesive soils 241 B.W.MMner VI

4 Uses and limitations of a clogging technique with bentonite in suspension to reduce 249 the hydraulic conductivity of soils Y.Savard, S.Leroueil & R.Bouchard Design of a graded filter - The most stable graded filter 257 T.Tanaka, EJoyokuni & E.Ozaki Summary of discussions on the session 'Hydraulic design and clogging' Application of filters and case studies Dewatering a deep excavation in glacial silts and sands 269 W.Steiner The hydraulic transmissivity of geosynthetics: An experimental comparison between 277 unidirectional and radial flow MAvanzini, D.Cazzuffi & P.Rimoldi Application of biodegradable jute geotextile filters D. Ramaswamy, G. P. Karunaratne & S. Palit Laboratory investigations of geotextiles and their implementation 293 L. Z. Niespodzihska Filter stability of non-woven geotextiles - Tests in situ 301 W.Muth A contribution to the examination of hydraulic stability of earth and rock fillings 305 H.H.Schwab Laboratory study of segregation of granular filter materials 313 T.C.Kenney & J.Westland New developments of filters in some recent Italian embankment dams 321 E.Baldovin Long term behaviour of a non-woven geotextile in a 21 year-old dam 331 Ph.Delmas, ANancey, Y.H.Faure & B.Farkouh Seepage conditions in the core and foundation of an earth- and rockfill dam 339 V.I.Shcherbina, E.AFedotova & AM.Navitskas Summary of discussions on the session 'Application of filters and case studies' Suffosion and piping A new model to deal with the piping mechanism 349 J.BAWeijers & J.B.Sellmeijer Assessment of suffosion in non-cohesive and graded soils 357 VV.Burenkova Underground erosion caused by raised water levels of impounded rivers 361 HArmbruster & I.H.M.Troger VII

5 Mechanism for regressive erosion beneath dams and barrages 369 HMuller-Kirchenbauer, M.Rankl & C.Schlotzer Hydrodynamic classification of a non-cohesive soil in the vicinity of geotextiles 377 W.Richwien & W.Magda Summary of discussions on the session 'Suffosion and piping' Closure Closing report 387 W.Wolski Authors' addresses 397 Author index 401 VIII

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