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�k D 3385 . /410. VOYX11. -Innex Adan !lyuid/cwf nv+rnw/tKl►st;Q Flyw valuefo�.vaJ<U; ' F, t;, .tnnur, C1cZL+1•ad*,_; srs Com_ Floau fe4,rt,nJ. Ly 4 t�T.tG Trus �!w= ��nw Ksny 14nnule.rbjeu� �'+-• RnR...�r1Y. 4�C ftA�O.* .L.Lldtf7 �,[ t 1982. hr.:mT �l�L C>* fcl� �� eynar,Cs ; Wta�Xa.Cora��Inis�ac.. r /0$00 !S 3.0 //y 3g9 p,�y Day C/o ,shy c";,W Z 5 • iv:/ /.f yyS S: /S- Z/;- E 7.i.� 8.9 �9S N !.R /•� s 10:307, S' 8 � 3 F a of y /aS ;43 ►3. By8 tl ' �6 1.3 /.7 /8 s r, %:G17 3b /Yy 1qp "30 90 Tse 2.�, zy z./ Xz 6 s u ,a 32.z E ►t fAO 8yB ys•e 7 S tt I.2: E k 31 9yY 3S6 590 .� Z• ,? IQe3i%/ �� a6 8 5 3:'W 6 D i= rt 4,1D 72Y6 ,zG3 877 3sz 690 N 2165' 9 F '� s30 300 art s" 60 z 42 13 FIG.3 Data Form for infiltration Test with sample Data I in the measured infiltration rate. Therefore, in such tests, test fluid from leaking to the ground surface surrounding the ' completely covei the top of the rings and unsealed reservoirs ring, and (b) be deeper than the depth to which the inner ring with a relatively,airtight material,but vented to the atmosphere will be driven. A depth of about 150 mm (6 in.) is usually through a small hole or tube. In addition, make measurements adequate. Use blows of medium force to prevent fracturing of to verify that the rate of evaporation in a similar test configu- the soil surface. Move the wood block around the edge of the i ration(without any infiltration into the soil)is less than 20%of driving cap every one or two blows so that the ring will the infiltration rate being measured. penetrate the soil uniformly. A second person standing on the 8.2.2 Make provisions to protect the test apparatus and fluid wood block and driving cap will usually facilitate driving the from direct sunlight and temperature variations that are large ring, and reduce vibrations and disturbance. enough to affect the slow measurements significantly, espe- 8.3.3 Center the smaller ring inside the larger ring and drive ciaily for test durations greater than a few hours or those using to a depth that will prevent leakage of the test fluid to the 1 a Mariotte tube.The expansion or contraction of the air in the ground surface surrounding the ring, using the same technique Mariotte tube above the water due to temperature changes may as in 8.3.2.A depth of between about 50 and 100 mm(2 and 4 cause changes in.the rate of flow of the liquid from the tube in.) is usually adequate. which will result in a fluctuating water level in the infiltrometer. rings. 8.4 Driving Infiltration Rings with Jacks: 8.3 Driving Infiltration Rings with a Sledge: 8.4.1 Use a heavy jack under the back end of a truck to drive rings as an"alternative to the sledge method (see 8.3). NorE 5 Arivingrings with a jack is preferred; see 8.4. 8.4.2 Center the wood block across the driving cap of the 8.3.1 Place the driving cap on the outer ring and center it ring.Center a jack on the wood block.Place the top of the jack � Lthereon. Place the wood block (see 63) on the driving cap. and the assembled items vertically under the previously posi- {8.3.2 Drive the outer ring into the soil with blows of a heavy tioned end of a truck body and apply force to the ring by means sledge on the wood block to a depth that will (a) prevent the of the jack and truck reaction.Also,tamp near the edges or near 374