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1 <br />1 <br />1 <br />t <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />156 <br />FALLING HEAD TEST Test N° Oole Project SAN L-+.~tS <br />ALLU~L Engineer R.p~µ50N Borehole 03 <br />Borehole co-ordinates Collar elevation <br />'Depth to lop of test section 1q'~ S}9 m Length of test section, L(2~'~$•Zm <br />Depth of static water level, Hw 23~) }, Olm Radius of borehole,r I ~" Oµg3m <br />Excess head, he 23' ~ .~•Ol m Radius of standpipe or casing, rcl;~ m <br />Time,T (mint O I ~j \{ (y l0 <br />Depth to (p*) (8r) (14') (19.8 ~1- 23) <br />water, hw (m) O 2~4`I 5,19 6.O (i $5 ~~01 <br />Excess head , <br />ht= Hw- hw (m) }.OI y$} 1.$3 I.ol .4(o O <br />ht/he I.O .(05 .21a .l4 .O~ O <br />Head -time graph 1 slope of graph is S 1 <br />L0 <br />0.6 <br />0.6 <br />0.4 <br />0.3 <br />hf h 0.2 <br />e <br />0.1 <br />0 08 <br />0.06 <br />0.04 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />5 10 IS 20 25 30 <br />Time -minutes <br />t=0 Casing t=t Calculations z <br />'h ~ Permeability k =0.1335 (~) m/sec. <br />w <br />HW h"' H <br />h 5= Cl.o-o o~)~~~-0)=0,155 <br />! SW. L. h1 s W.L <br />fc= O•oz5m <br />L= 6.2.rrt <br />L L <br />K= I~ to X 10-rO m f SCC <br />h!=Hw_hw ht-Hw hw 1. (o x10-~cm15~G <br />qLl DEPTHS RELFl-c\VE TO TOP OP 5'A NDPIPC <br />Fig B-3 - Proforma for falling head test. <br />