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I he following apparent pressure diagrams are currently used to design struts in braced <br /> cuts These pressure diagrams represent envelopes of field measured pressure values in <br /> different types of soil (Ref Terzaghi and Peck, 1967 and NAVFAC ❑M 7 02, 1982) <br /> Sand Soft to medium clay Stiff-fissured clay <br /> (y Hlc) 6 (y Hlc) 4 <br /> 0 25H 0 25H <br /> H <br /> 0 50H <br /> 0 75H <br /> 4 <br /> 0 25H <br /> Ch <br /> 6h 6h <br /> ah = 065Kayl-H ah = KayH ah = 02yH to <br /> where where 0.4y H <br /> I. = tan g (45-�/2) Ka = _ (4clyH) Use the lower value <br /> when movements <br /> Use K, = 1 - (2 c/y H ) are minimal and <br /> where cut is underlain construction penod is <br /> by deep soft normally short <br /> consolidated clay <br /> c = soil cohesion <br /> � = soil friction angle For 4< (y H l c) < 6 <br /> y = soil unit weight <br /> H = depth of cut use the larger 6h value <br /> SHORING PRESSURE DIAGRAMES <br /> KLEINFELDER COUNTRY CLUB SEWER TRUNK <br /> STOCKTON CALIFORNIA 2 <br /> DATE PRODUCED�ra;2002 DATE KEdISEO <br /> -Uovrlorl Ielelnleloer he <br /> PROJ NO '3629 G01 FIiLLEIJAME 3R4i,ED F;{9 <br /> up1 <br />