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Results of an experimental programme of in situ permeability testing in rock
14A 881108 Least-squares esnmate of the Horton infiltranon parameters Esen, I I
Sod Scl V144, N1, Jul3, 1987, P6-10 The Horton equatson to describe the mfiltratton of water into sod has been cntsctsed for sts lack of theoretical basts, and because the three parameters m the equauon cannot be determined analytscally A nonhnear least squares scheme ss presented to esumate the three parameters, mttml fro) and final (fc) mfiltratton rates and rate constant (K) Four case studses show the Horton equatton predscts mfiltrauon better than other commonly adopted models 881109 Fseld permeabdity test for earthen hners Darnel, D E, Trautwem, S J
In: Use of In Suu Tests m Geotechmcal Engineering (papers to the Conference, Blackslmrg, 23-25 June 1986) P146-160 Publ New York ASCE, 1986 (ASCE Geotechmcal Spectal Pubhcatwn No 6) Field permeabdsty test optsons are mtroduced and a sealed double-nng mfiltrometer (SDRI) described Thss mstrument has a sealed tuner tang, whsch allows measurements at low mfiltratton rates and mmsmsses problems due to temperature fluctuatson and evaporatton Infiltrometers cover large areas and measure the macropermeabdsty rather than mscropermeabdsty, and are recommended for testmg Imers A case study of the use of the SDRI ss presented 881110 Hazardous waste containment Mitchell, J K
In. Groundwater m Engineermg Geology (papers to the 21st Annual Conference of the Engineering Group of the Geological Soctety, Sheffteld, 15-19 September, 1985) P145157 Publ London Geological Society. 1986 Compacted clay barners, slurry trench cutoff walls, geomembranes, concrete dtaphragm walls, sheet pde walls, grout curtams, and hydrauhc barriers have all been employed to contam waste materials Properly compacted clays and flexible membranes are widely used, esther smgly or together Evidence suggests that the hydrauhc conducttvsty of properly compacted clays Is httle affected by common hqmd wastes Nuclear waste poses problems because of elevated temperatures and extended storage periods Smecttte clay appears a suitable material for repository seals 881111 Rapid permeabihty testing by the pressurisation method Pontm, J M A, French, M A
In: Groundwater m F.qineering Geology (papers to the 21st Annual Conference of the Engineering Group of the Geological Society, Sheffield, 15-19 September, 1985) t'263272 Publ London Geological Soczety, 1986 The HR method has been developed for raptd and economtc measurement of permeabdtty to wRhm an order of magmtude of that achteved wtth large scale pumpmg tests The basts of the method is to produce compresstble flow of groundwater by pressunsmg specsal boreholes wtth scaled screened zones The theory of permeabshty tests sn scaled boreholes ts presented and the development of the method from exsstmg techmques ss described Borehole dessgn and constructton, equtpment, test method, analysts of results and advantages of the HR techn,que are d~scussed
881112 Measurement, interpretation and use of permeabshty values wtth specific reference to fissured aquifers WalthaU, S, Campbell, J E
In: Groundwater in Engmeermg Geology (papers to the 21st Annual Conference of the Engmeering Group of the Geological Soczety, Sheffteld, 15-19 September, 1985) P273278 Publ London Geolog:cal Society. 1986 The range of techmques avadable to assess permeabshty values of aquifers mcludes laboratory measurements usmg water or gas permeameters,pumpmg tests, packer tests, or mathemaUcal modelhng Each techmque ts described and the hmstattons and metats dsscussed Some measure the hydrauhc propertses of the borehole, others aquifer properties, and care ts needed to select the appropriate method for each partscular case A case study is presented whsch illustrates the use of these techtuques apphed to the problem of dewatenng for shaft constructlon
881113 Results of an experimental programme of in situ permeability testing in rock Wdd, J L, Money, M S
In: Groundwater in Engineering Geology (papers to the 21st Annual Conference of the Engineering Groupof the Geological Society, She~leld, 15-19 September, 1985) P283293 Publ London Geologtcal Soctety, 1986 A series of dnllholes up to 30m deep was bored m sandstone and basalt rock masses Permeabthttes were measured usmg standard packer eqmpment and a prototype double packer Results are compared and analysed Water levels m the boreholes are seen to be affected by the water flush used m dnlhng m some cases The effecuve ptezometnc level m the hole at the ume of the test cannot be assumed to be the same as that tn a completed borehole Marked vanaUons are seen m standmg water levels and measured permeabdRles for adjacent closely spaced holes
Compressibility, swelling and consolidation See also 881292. 881305, 881306
881114 Field observations of soft clay cm'molidation in the Fraser Lowland Crawford, C B, deBoer, L J
Can Geotech J I,'24. N2, May 1987, P308-317 A 15 year record ofconsohdatton under an earth embankment ts presented Settlement rates of areas under maximum loadmg were greatly accelerated by the mstallaUon o f sand drams Pore pressures momtored dunng construcuon were used to control the rate o f Ioadmg, which was decreased to prevent fadure Predtctsons of settlement and stabthty based on laboratory and field tests proved dangerously maccurate Consolsdatton charactensUcs measured m the laboratory are compared to those from field observauon, and methods of smprovmg consohdatton prediction dlseussed
© 1988 Pergamon Press pie Reproductton not permitted
Sod Scl V144, N1, Jul3, 1987, P6-10 The Horton equatson to describe the mfiltratton of water into sod has been cntsctsed for sts lack of theoretical basts, and because the three parameters m the equauon cannot be determined analytscally A nonhnear least squares scheme ss presented to esumate the three parameters, mttml fro) and final (fc) mfiltratton rates and rate constant (K) Four case studses show the Horton equatton predscts mfiltrauon better than other commonly adopted models 881109 Fseld permeabdity test for earthen hners Darnel, D E, Trautwem, S J
In: Use of In Suu Tests m Geotechmcal Engineering (papers to the Conference, Blackslmrg, 23-25 June 1986) P146-160 Publ New York ASCE, 1986 (ASCE Geotechmcal Spectal Pubhcatwn No 6) Field permeabdsty test optsons are mtroduced and a sealed double-nng mfiltrometer (SDRI) described Thss mstrument has a sealed tuner tang, whsch allows measurements at low mfiltratton rates and mmsmsses problems due to temperature fluctuatson and evaporatton Infiltrometers cover large areas and measure the macropermeabdsty rather than mscropermeabdsty, and are recommended for testmg Imers A case study of the use of the SDRI ss presented 881110 Hazardous waste containment Mitchell, J K
In. Groundwater m Engineermg Geology (papers to the 21st Annual Conference of the Engineering Group of the Geological Soctety, Sheffteld, 15-19 September, 1985) P145157 Publ London Geological Society. 1986 Compacted clay barners, slurry trench cutoff walls, geomembranes, concrete dtaphragm walls, sheet pde walls, grout curtams, and hydrauhc barriers have all been employed to contam waste materials Properly compacted clays and flexible membranes are widely used, esther smgly or together Evidence suggests that the hydrauhc conducttvsty of properly compacted clays Is httle affected by common hqmd wastes Nuclear waste poses problems because of elevated temperatures and extended storage periods Smecttte clay appears a suitable material for repository seals 881111 Rapid permeabihty testing by the pressurisation method Pontm, J M A, French, M A
In: Groundwater m F.qineering Geology (papers to the 21st Annual Conference of the Engineering Group of the Geological Society, Sheffield, 15-19 September, 1985) t'263272 Publ London Geological Soczety, 1986 The HR method has been developed for raptd and economtc measurement of permeabdtty to wRhm an order of magmtude of that achteved wtth large scale pumpmg tests The basts of the method is to produce compresstble flow of groundwater by pressunsmg specsal boreholes wtth scaled screened zones The theory of permeabshty tests sn scaled boreholes ts presented and the development of the method from exsstmg techmques ss described Borehole dessgn and constructton, equtpment, test method, analysts of results and advantages of the HR techn,que are d~scussed
881112 Measurement, interpretation and use of permeabshty values wtth specific reference to fissured aquifers WalthaU, S, Campbell, J E
In: Groundwater in Engmeermg Geology (papers to the 21st Annual Conference of the Engmeering Group of the Geological Soczety, Sheffteld, 15-19 September, 1985) P273278 Publ London Geolog:cal Society. 1986 The range of techmques avadable to assess permeabshty values of aquifers mcludes laboratory measurements usmg water or gas permeameters,pumpmg tests, packer tests, or mathemaUcal modelhng Each techmque ts described and the hmstattons and metats dsscussed Some measure the hydrauhc propertses of the borehole, others aquifer properties, and care ts needed to select the appropriate method for each partscular case A case study is presented whsch illustrates the use of these techtuques apphed to the problem of dewatenng for shaft constructlon
881113 Results of an experimental programme of in situ permeability testing in rock Wdd, J L, Money, M S
In: Groundwater in Engineering Geology (papers to the 21st Annual Conference of the Engineering Groupof the Geological Society, She~leld, 15-19 September, 1985) P283293 Publ London Geologtcal Soctety, 1986 A series of dnllholes up to 30m deep was bored m sandstone and basalt rock masses Permeabthttes were measured usmg standard packer eqmpment and a prototype double packer Results are compared and analysed Water levels m the boreholes are seen to be affected by the water flush used m dnlhng m some cases The effecuve ptezometnc level m the hole at the ume of the test cannot be assumed to be the same as that tn a completed borehole Marked vanaUons are seen m standmg water levels and measured permeabdRles for adjacent closely spaced holes
Compressibility, swelling and consolidation See also 881292. 881305, 881306
881114 Field observations of soft clay cm'molidation in the Fraser Lowland Crawford, C B, deBoer, L J
Can Geotech J I,'24. N2, May 1987, P308-317 A 15 year record ofconsohdatton under an earth embankment ts presented Settlement rates of areas under maximum loadmg were greatly accelerated by the mstallaUon o f sand drams Pore pressures momtored dunng construcuon were used to control the rate o f Ioadmg, which was decreased to prevent fadure Predtctsons of settlement and stabthty based on laboratory and field tests proved dangerously maccurate Consolsdatton charactensUcs measured m the laboratory are compared to those from field observauon, and methods of smprovmg consohdatton prediction dlseussed
© 1988 Pergamon Press pie Reproductton not permitted