lZTA

Surface structures

Dams and embankments

BOWMAN, JC NORFOLK DIST. CORPS. ~GRS,VIRGINIA,USA ANDESSON, CS NORFOLK DI~. CORPS. ~GRS, V IRG INIA, USA Foundation t r e a t s ~ for t h e Gathri~ht dam. 6F. INT.WAT.PWR DAM CONSTR.V28,N~,JUNE 1976,P38-~2. This 8era high rockfill din, is beln~ constructed in Vir. ginia, USA, on Karstic limestone with a cavernous left abu tment . The p r o ~ e c t i s d i s c u s s e d under t he fo l .~ , -h~ hesd~: physical geology; foundation treatment; con- structiun of -~-~rane cutoff; other tread-w-t; e m b ~ and ,pillwa~; instrumentation; spillway; outlet works.

MD~JRA, 8 TOKYO ELEC .POW.CO. INC., J Desi~ and construction of the Takase river dsms. 4F,2T. IIf~.WAT.P~R DAM CONSrI~.V28,NS,AUG.l~6,P35-~2. The scheme involves 2 emba~aent type dams, 176 m and 12~ m in height. The pro~ect is discussed under the followln~ heedin~s: outline of the project; geology of t h e dam s i t e ; e ~ a n ~ e n t zon ing ; d e s i g n p r o p e r t i e s of e ~ a ~ e ~ t m a t e r i a l s ; c o n s t c u c t i o n f e a t u r e s ; c o n t r o l of embankment construction; instrument Installatic~s.

~185 P~MAN,AD BUILDING RES .STN, GARSTON, GB CHAP[ ~,JA BUILDING RES .STN, GARSTON,GB Predicted defo~nation of the u~stres~a _-_,~rane of a rockfill dam. ~F, IT,7R. GROUND ~GNG. ,VS, N6, NOV. 1976, P~7-~8. The deflections due to im~ound~ of the asphaltic con- crete membrane of a ~3m high rockfill ds~ have been p r e - d i c t e d . Defo~tion l ~ o p e r t i e s of im d i s samples of the rockfi11 were m~-asured in large oedometers and an analy- sis m~de using a finite element ~-chnique. The actual deformations of the membrane will be measured by horizon- tal p l a t e g~ges inata l led in the d ~ d u r i n g construe. t i o n end i t i s t h e purpose o f t h i s a r t i c l e t o p r e s e n t the predictions before the reservoir is filled for the first time.

Foundations

AMIR,JM SO~DLOV,M TEL AVIV UNIV.,IL Finite el~,~-~t ansl~sis of piles in expu~ive media. 15F,2~,30R. J.G~0TE~H.~GN3 DIV.ASCE,VI02,GTT,1976,P701-719. A two-dimensional finite element model was developed to sin~late piles in ex~enaive media. Both flow and elastic b ~ i o u r were assume8 linear, end en.r irc~ental effects were represented b y a sinusoldal moisture flux functi~m. Volume changes of t h e s o i l caused a l l p i l e s t o move, ~u t displac~,~ts were smaller for deeper piles end piles with heads laterall~.fixed. Bells and Isolatlc~ sleeves showed only a minor effect, while impervious peripheral -~ranes, beneficial for shs/low footings, may increase the displace,~ts of piles. Auth.

1187 SA~,MA PAHLAVI UNIV.,SHIRAZ, IN Dynamic b~aviour of l~rtiall~ embedded pile.3F,iT,SR. J .GEOTECH .~R~G DIV. ASCE, VI02, GTT, 1976 ,P775 -78~. Vibrational behavlour of a partially e~bedded pile is s t u d i e d t h e c ~ a t ~ c a l ~ and r e s u l t s c o ~ s r e d ~ l t h a v a i l a b l e field data. k mthematical model i n c o r p o r a t i n ~ "pile- s o i l interaction" for r e s o n S n t p i l e driving is proposed .

Only the longitudinal mode of the pile is cc~sldered, but the same theory ~ be modified slight~V to predict tor- sional behaviour as well. The model equation is solved throu6h standard Fourier t r a n s f o r m method.

1188 POUIES,HS UNIV. SYDNEY,AUS DE AM~ROSIS,LP DAVIS,EH Method of calculating lon~-term creep settlements. 13F,~T,32R. J .GEOTECH. ~GNG DIV .ASCE,VI02, GT7,1976, P787- 80~. A practical method of estimating the rate of eree~ and the tlme-settl~nent behaviour of a footing on cla~ under three-dlmensi~aal condit _~c-~ is described. This method, termed the "extended stress path method" is an extension of earlier methods for calculating i~nediate and conso- l i d a t i o n settlement. The methol is restricted to Poet- consolidation c r e e p and cermet b e applied to creep which n ~ occur under u n d r a i n e d c o n d i t i o n s . The r e s u l t s o f model footin~ testa are presented and the effects on the rate of creep of factors such as the ratio of footing diameter to la~er depth, and the loadin~ intensity, are cc~sidsred. Comparisons a re ~ e be tween the obse rved creep rate end time-settlement behaviour of the model footings and the values calculated from the proposed approach~ and reasonable a~reem~t is found. Auth.

1189 BHUSHAN, K WOODWARD.CLYDE, LOS ANGW~, USA HALEY, SC W0ODWARD-CLYDE, I~S ANG~ W~,USA Stress distribution for heavy embedded structures. Technical note. 3F,7 R . J .GEOTECH. ~GNG DIV .ASCE, VI02, GTT, 1976, P807-810. The d i s t r i b u t i o n o f s t r e s s e s b e n e a t h heavy s t r u c t u r e s embedded in a homogeneous isotropic elastic medium a re come,ted using Westergaard's approach i n which t h e semi-infinite ~ss is reinforced internally so that no horizontal displacements can occur. The method is applied t o t h e c a l c u l a t i o n of e l a s t i c s e t t l e m e n t s under heavy nuclear power plsnt b u i l d i n g s .

1190 ~ROM~, HB ROYAL INST. TECHh~L, SI~C~LM, S BAIX4OLMS,C ~ PILING L~,D~BY,G~ High capacit7 l~ecast concrete piles at Thames Refinery pro~ect. 8F,1T,~R. GROUND ~GNG.V9,N~,JULY,1976,FIg-23

1191 HARRIS,G EDWARD L 3AT-~4AN,BOKSN~G N,ZA Foundations end earthworks for cylindrical steel storage tanks. 6F,IT,TR. GROUND ~JNG .vg, NS, JULY, 1976, P24-31. Steel storage tanks and their perfc~mBn~e are b r i e f l ~ reviewed and the following a s p e c ~ of foundatlc~s are discussed: shallow four~IAtic~Is in competent ground; alternstives for Ixx~r ground; fill replacement technique; piled foundations; and foundation prelo-~. Water t e s t i n g , s e t t l e m e n t r e c o r d s , dyke e o n ~ m d a r e a s and underwriting cc~sideratlons are also considered.

ANONDOUS Slip coat for Newhaven bridge ;recast piles. GROUND ~NG .V9, NM, MAY, 1976, I~5-46. Briefly describes the l~o=eas of sllp-coatlng piles (for a r o a d b r i d g e a t Newhavan, D~) t o al 1 ~ c o n s o l i d a t i n g s o i l s t o s l i p p a s t t h e p i l e s v i t h o u t ~ l o a d t o them. The slip-coSt used was 6ram of S~ell Bitumen Com- Ix~nd SL.

1193 ~ONYMOUS ~-oundLwork at Littlebrook D. 2R. GROUND ~GNG .vg, N2 ,MARCH, 1976 ,P30-33. Work c~ the site of the new 2000MW oil-fired ~ower sta- tlcn is described, including ground c o n d l t i o n s , bc~'ed piling construction end teati~, pu~me diaphra~a wall and groutlng of chalk beneath the foundations.