88A

ship to overburden samplir~, overburden sampling and analysis, use of soil-overburden data in mine plarmlng and development, a~d minesoil classification.

Avail: USBM, 4800 FOrbes Avenue, Pittsburgh, Pa, 15213 USA

Dams and embankments

824142

824143

824144

See also: 824192, 824193

REASONS FOR M25 SLIP STILL NOT D~INTTE Byrd, T New Civ Engr, ~86, 8 April 1982, P12-13

Discusses the failure of an embar~cnent built to take part of the M25 motcrway at Es~ping, UK. Possible failure mechanisms are put forward and remedial measures outlined.

RUAHIHI : THE MECHANIsM OF FAILURE New Civ Ergr, N~82, 18 March 1982, P30-31

Repo~ts the results of an enquiry into the failure of a canal embankment at the Ruahlbl l~ydroelectric power system site, New Zealand. The l~obable failure mode is described and it is concluded that inadequate geOtechnical investigation of the site was responsible for the failure.

WORLD's FIRST ALL'ROLLCP~ DAM schrader, E K Civ Engng, NY, V52, ~, April 1982, I~5-h8

Discusses Willow Creek dam, Oregon, USA, the first gravity dam being built entirely with roller compacted concrete (defined as a damp gravel fill with typically 2.5-7 per cent cement ).

824145 INFLUENCE OF SHRINKAGE CRACKS ON PORE-WA~ER PRESSUREs WITHIN A CLAY ~BAM<MENT

Anderson, M G; Hubbard, M G; Kneale~ P E Q J Engng Geol, VIS, NI, 1982, P9-14

Shrinkage cracks were monitored in a clay embankment where the soil water response to precipitation had been shown to be more rapid than the clay micro-permeability would predict. The cracks were shown to increase the hydraulic conductivity of the clay at all times of the year and to be the cause of the rapid soil water poten- tial responses mor~tored. X-ray examlr~tions of closed crack sites indicated that fractures at these sites formerly extended to greater depths.

824146 DESIGN OF FILTERS FOR CLAY CORES OF DAMS Vaughan, P R; Scares, H F J Geetech Er~ Div ASCE, Vl08, NGT1, Jan 1982,

P17-31

Describes a method for the design of filters to protect cohesive clay meres of dams. The method was developed using information obtained on the failure of the Balderhead dam.

824147 RECENT PROGRESS IN THE STUDY OF ~MBANKMENTS ON C~RESS~E SOILS (~N FRESH) Magnan, J P Bull Liaison Lab Ponts Chaussees, NIl6, Nov-Dec

1981, I:~5- 56

subjects reviewed inclnde (i) The observed behaviot~ of e m b ~ s on soft clay (excess pore pressure tunder the centre-line of the

embankment, horizontal displacements of the soil, a new conception of the behaviour of the soil under~ath the e~nt), (2) Ad~mces in methods of design (one-dimensio~ consoli- dation, pl~ne dimensional Consolidation, analysis of settlements observed under embar~nts) ard (3) The practical applications Of the research.

824148 D~A~ENTS ON CC~PRESSIBLE sOILS: INSTRt~E~TATION AND INTERPRETATION OF M E A ~ S (IN FRENCH)

Magn~n, J P; Mieussens, C Bull Liaison Lab Ponts Chaussees~ NIIS, 1981, P61-70

The paper allalyses: (i) the objectives of instrumentation in the case of embankments on compressible soils, (2)types of instru~ments anl prlrmiples of measurements, (3) the time- table of measurements, and (4) the uses that can be made of the measurements in the control of stability during eenstructlon~ controi of consolidation of the fourzlation soil during construction, extrapolation of curves of settle- ment observed, the effect Of embar~m~ents on nearby p~les, ard calculation of the vol~me of emba~nt constructed.

Foundations

824149 HK'S OFFSHORE HIGHWAY COASTS ALONG F~guson, H New Civ Engr, h~8, 22 April 1982, P20-21

Presents a case history for the construction of a motorway on stilts alorg the waterfront of Hor~ Kong. This includes the sinking of 830 piles throt~ highly unpredictable reclaimed land and marine deposits. Two techniques of piling are being used: the Casagrande technique and an adap- ted auxiliary method.

824150 FOUNDING THE WORLD'S MOST EXCITING BUILDING F erguson, H New Civ End, ~2, 18 March 1962, P18-20

The problems encountered and the construction of the founiation for the new Hor~ong bank are described. The building was to be fourded on two independent sets of caisson piles in very bad ground conditions. Mcw~nent of adjacent buildings due to the sit.king of a diaphragm ws_ll, in order to lower the gro%und water level, was to be limited by an intensive monitoring programme.

824151 COST-EFFECTIVE, SHALLOW FOUNDATION ACCOmMODATEs THREE FEET OF ~

Wu~ A H; Scheessele, D J Civ Er~, NY, ~3, N3, March 1962, F65-67

Describes the foundation system used for a vehicle repair plant at the Anacostia Naval Station, Washington, DC, USA. The subsoil condi- tions of the site eor~isted of deep deposits of soft silty clay. Pile f~tlons to avOid large settlements were considered too expensive and the use of sand drains would have been un- eeona~ieal and time cons~ng. The foundation system consisted of a compacted structural fill on a firm stone base with invex~ed 'T' shal~i footings for suppurt of the buildings. Settlement was monitored during the structural fill work.

824152 SHALLOW FOUNDATIONS ON LONDON CLAY JOhnson, P B Q J Er~ Geol, V15, N1, 1982, P3-7