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Structural and cut-off diaphragm walls
128A
127~ SANDHU, BS GILB~qT ASSOC .READING, PA.USA Earth pressure on walls due to surcharge.4F. C IV .E~GNG, ASCE, Vhh, NI2, DEC .197£,P68.70. Charts for the calculation of earth pressure on rigid ws_1_Is due to surcharge, based on Boussinesq's equations for stress in elastic, ho~geneous and Isotropic solids are described and discussed.
Surface structures See also abstract: 1252. 1275 BOYES,RG ANDREWS, BOYF_~ LTD.ALTON, GB Structural and cut-off diaphragm walls .Textbook.79F. APPL.SCI PUBL.LTD BARKING, ESSEX, GB.1975,179P. The development of the technique and the equipment used in construction are traced and detailed descriptions are provided of the various methods used in forming the completed wall or foundation structure. The difficulties and procedures associated with the various stages of construction are explained in detail. The latest developments, such as use of prefabricated concrete panel units to form w~l]~ and the self-hardaning cement~entonlte slurry mixes, are considered in detail as are the methods of testing,dlsposal, etc. The properties of bentonite powder and methods for its proper dispersion in water, use of additives in special circumstances, re-use and treatment, stability theories, etc., are considered. MsrQv examples of the use of structural walls for tunnel and underpass basements, shaft construction, etc. and of the use of cut-off walls to dams, river ws//s, site dewatering are given whilst the design and use of piles and bearing elements of many shapes are detailed. 1276 DAVISON, DJ Opencast coal mining. The future and the environment.6F. COLLIERY GUARD.V233, Ns,MAY, 1975, P176-181.
Embankments and e m b a n k m e n t dams 1277 WILLIAMS, AA NAT .BUILD .RES. INST .PRETOR IA, ZA ANDREW,MR J ~ A B E S AND GRE~,CAPE TOWN, ZA GLENDAY,BS J~'~ARES AND GRE~,JOBURG,ZA The design and construction of some high railway barLk~ between Ermelo and Piet Relief. Conference. Session five. Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND ~GNG, DURBAN, SEPT .1975, S .AFR. INST .CIV. ENGRS, 7P • 1278 WILLIAMS, AA NAT .BUILD. INST .PRETORIA,ZA The settlement of three embankments on ancient residual soils.Conference.Session five.Synopsls. 6TH REG. CONF .AFRICA, SO IL MECH. FOUND. ENGNG, DURBAN, SEPT.1975, S .AFR. INST.C IV. ENGRS. 8P. Three sites have been studied where large embsr~ents had been constructed over ancient, deeply weathered soils, residual from igneous rocks. The actual settlemerit was monitored during construction, and in all cases was much less than that predicted from the void-ratio: pressure curve obtained in one.dlmensional consolidometers. Undrained triaxial tests on these very low density soils revealed stress path behaviour very similar to that of heavily over-consolidated soils. Empirical corrections, current in overseas practice, gave estimates very close. to actual performance.Auth.
1279 LEGGE,WC DEPT .WAT .AFFAIRs, ZA Problems associated with embankment dam design in South Afrlca.Conference.Session flve.Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND.~GNG, DURBAN, SEPT .1975,S .AFR.INST.CIV .~GRS .4P. The importance of assessing the degree to which results of laboratory tests can be applied to earth dam design is discussed together with the variatlc~% in available materials in various regions in South Africa. A number of problems facing the designer of earth clams under these coadltions is then consldered.Auth. 1280 JONES, GA NAT. INST .ROAD RES .PRETORIA, ZA LEVOY, DF LOUDON AND PTN]~S,DURBAN, ZA MCQUEEN,AL LOUDON AND PTNERS,DURBAN,ZA Embankments on soft alluvium. Settlement and stabi_ lity study at Durban.Conference.Session five.Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND.~GNG,DURBAN, SEPT. 1975, S.AFR. INST. CIv.~GRS. 8P.
1281 CLARK, DM SCOTT AND DE WAAL, JOBURG,ZA Design and construction of high embankments with piezometric and settlement monitoring.Conference. Session five .Syrmpsis. 6TH REG.CONF.AFRICA,SOIL MECH.FOUND.ENGNG,DURBAN, SEPT. 1975, S.AFR. INST. C IV. ~GRS. 7P After carrying out a cost analysis of the economics of building a viaduct compared to an e~sakment a decision was made to replace two viaducts with embenkments of 36.6 m and 38.7 m high on the Piet Retief.Paulpieters. burg section of the Broodsnyersplsas to Vryheid railway llne. The method of design sad construction of these embankments together with a third embankment 24 m high are given. The type of instrumentation used to monitor the soil pore water pressure and settlement of the subsoil during construction are described and diagrams of typical results are also given.Auth.
1282 SEYMOUR-JOITES,AA New design procedures for stability of soft clays.Discussion of paper by C.C.Ladd and R.Foott, J.Geo. tech. Engng Div.V100, N7,1974.1T, hR. J. GEOTECH. ENGNG DIV .ASCE,V101, GT1, JAN.1974, P81- 83.
Dams other than embankment dams 1283 VARSHNEY,RS IRRIG DEPT.U~TAR FRADESH, IND Stresses in the layered half plane below a gravity dam .6F, IT, 22R. INT.J.ROCK MECH .MIN. SC I.GEOMECH. ABSTR .V12,NS. 6, JUNE, 1975, P159-166.
Foundations 128h GREENSTEIN, J ISRAEL INST.TECHNoL.HAIFA, IL Ultimate strip loading on anisotropic calcareous sandstone .6F,IT, 8R. ROCK MECH.V7, N2, JUNE, 1975, P73- 81. Ultimate bearing capacity is determined for a foundation strip on calcareous ssmdsteme with layers inclined up to 30 deg. from the horizontal. In this coheslve-frlctional medium the failure field is asymmetric, and its anistropy is shown to have a substantial effect both on the failure field and on the ultimate bearing capacity.
127~ SANDHU, BS GILB~qT ASSOC .READING, PA.USA Earth pressure on walls due to surcharge.4F. C IV .E~GNG, ASCE, Vhh, NI2, DEC .197£,P68.70. Charts for the calculation of earth pressure on rigid ws_1_Is due to surcharge, based on Boussinesq's equations for stress in elastic, ho~geneous and Isotropic solids are described and discussed.
Surface structures See also abstract: 1252. 1275 BOYES,RG ANDREWS, BOYF_~ LTD.ALTON, GB Structural and cut-off diaphragm walls .Textbook.79F. APPL.SCI PUBL.LTD BARKING, ESSEX, GB.1975,179P. The development of the technique and the equipment used in construction are traced and detailed descriptions are provided of the various methods used in forming the completed wall or foundation structure. The difficulties and procedures associated with the various stages of construction are explained in detail. The latest developments, such as use of prefabricated concrete panel units to form w~l]~ and the self-hardaning cement~entonlte slurry mixes, are considered in detail as are the methods of testing,dlsposal, etc. The properties of bentonite powder and methods for its proper dispersion in water, use of additives in special circumstances, re-use and treatment, stability theories, etc., are considered. MsrQv examples of the use of structural walls for tunnel and underpass basements, shaft construction, etc. and of the use of cut-off walls to dams, river ws//s, site dewatering are given whilst the design and use of piles and bearing elements of many shapes are detailed. 1276 DAVISON, DJ Opencast coal mining. The future and the environment.6F. COLLIERY GUARD.V233, Ns,MAY, 1975, P176-181.
Embankments and e m b a n k m e n t dams 1277 WILLIAMS, AA NAT .BUILD .RES. INST .PRETOR IA, ZA ANDREW,MR J ~ A B E S AND GRE~,CAPE TOWN, ZA GLENDAY,BS J~'~ARES AND GRE~,JOBURG,ZA The design and construction of some high railway barLk~ between Ermelo and Piet Relief. Conference. Session five. Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND ~GNG, DURBAN, SEPT .1975, S .AFR. INST .CIV. ENGRS, 7P • 1278 WILLIAMS, AA NAT .BUILD. INST .PRETORIA,ZA The settlement of three embankments on ancient residual soils.Conference.Session five.Synopsls. 6TH REG. CONF .AFRICA, SO IL MECH. FOUND. ENGNG, DURBAN, SEPT.1975, S .AFR. INST.C IV. ENGRS. 8P. Three sites have been studied where large embsr~ents had been constructed over ancient, deeply weathered soils, residual from igneous rocks. The actual settlemerit was monitored during construction, and in all cases was much less than that predicted from the void-ratio: pressure curve obtained in one.dlmensional consolidometers. Undrained triaxial tests on these very low density soils revealed stress path behaviour very similar to that of heavily over-consolidated soils. Empirical corrections, current in overseas practice, gave estimates very close. to actual performance.Auth.
1279 LEGGE,WC DEPT .WAT .AFFAIRs, ZA Problems associated with embankment dam design in South Afrlca.Conference.Session flve.Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND.~GNG, DURBAN, SEPT .1975,S .AFR.INST.CIV .~GRS .4P. The importance of assessing the degree to which results of laboratory tests can be applied to earth dam design is discussed together with the variatlc~% in available materials in various regions in South Africa. A number of problems facing the designer of earth clams under these coadltions is then consldered.Auth. 1280 JONES, GA NAT. INST .ROAD RES .PRETORIA, ZA LEVOY, DF LOUDON AND PTN]~S,DURBAN, ZA MCQUEEN,AL LOUDON AND PTNERS,DURBAN,ZA Embankments on soft alluvium. Settlement and stabi_ lity study at Durban.Conference.Session five.Synopsis. 6TH REG.CONF.AFRICA, SOIL MECH.FOUND.~GNG,DURBAN, SEPT. 1975, S.AFR. INST. CIv.~GRS. 8P.
1281 CLARK, DM SCOTT AND DE WAAL, JOBURG,ZA Design and construction of high embankments with piezometric and settlement monitoring.Conference. Session five .Syrmpsis. 6TH REG.CONF.AFRICA,SOIL MECH.FOUND.ENGNG,DURBAN, SEPT. 1975, S.AFR. INST. C IV. ~GRS. 7P After carrying out a cost analysis of the economics of building a viaduct compared to an e~sakment a decision was made to replace two viaducts with embenkments of 36.6 m and 38.7 m high on the Piet Retief.Paulpieters. burg section of the Broodsnyersplsas to Vryheid railway llne. The method of design sad construction of these embankments together with a third embankment 24 m high are given. The type of instrumentation used to monitor the soil pore water pressure and settlement of the subsoil during construction are described and diagrams of typical results are also given.Auth.
1282 SEYMOUR-JOITES,AA New design procedures for stability of soft clays.Discussion of paper by C.C.Ladd and R.Foott, J.Geo. tech. Engng Div.V100, N7,1974.1T, hR. J. GEOTECH. ENGNG DIV .ASCE,V101, GT1, JAN.1974, P81- 83.
Dams other than embankment dams 1283 VARSHNEY,RS IRRIG DEPT.U~TAR FRADESH, IND Stresses in the layered half plane below a gravity dam .6F, IT, 22R. INT.J.ROCK MECH .MIN. SC I.GEOMECH. ABSTR .V12,NS. 6, JUNE, 1975, P159-166.
Foundations 128h GREENSTEIN, J ISRAEL INST.TECHNoL.HAIFA, IL Ultimate strip loading on anisotropic calcareous sandstone .6F,IT, 8R. ROCK MECH.V7, N2, JUNE, 1975, P73- 81. Ultimate bearing capacity is determined for a foundation strip on calcareous ssmdsteme with layers inclined up to 30 deg. from the horizontal. In this coheslve-frlctional medium the failure field is asymmetric, and its anistropy is shown to have a substantial effect both on the failure field and on the ultimate bearing capacity.