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DEFINITIONS: NOTES: <br /> Q = Point load in pounds 1.Proceduros for estimating surchart3e pressures shown a6ove aio based on Manual <br /> � P 7.02 Naval Facililics Enginecnn�Command,September 1986,IJAVFA�DM 7.02). <br /> � Q�= Line load in poundsl(oot <br /> 2.Laleral eaAh prassures from su¢har�c shouid b�added to carth pressures <br /> H = Ezcavation height below footinp,feel presenled on Figures 7 and B as appmpnate. <br /> QN= Laleral earih pressure Irom surchar�e,ps� 3.See repnrt tezt for where surcharge pir.ssures zre appropriate. <br /> . G = Surcharge pressure in psl <br /> � - e = ReJians <br /> QH= Dislnbulion ef a�� in plan view <br /> F„= Resultant lateral force acting on wall,pounds <br /> R = Distance(rom base ot excavation to resulWnt lateral force,feet <br /> LATERAL EARTH PRESSURE FROM LATERAL EARTH PRESSURE FROM UNIFORM SURCHARGES, q <br /> POINT LOAD, Q�(SPREAD FOOTING) LINE LOAD, fb (CJNTINUOUS WALL FOOTING) (FLOOR LOADS, LARGE FOUNDATION <br /> ELEMENTS OR OTHER SURFACE LOADS) <br /> J x= m,H I� .�I X= m.H I� <br /> I _ _ . 1— -�--L� 9 �Psf) <br /> �Oo �Q� <br /> I � �Z=nH ~� PN Z-InH PN <br /> �� F{ A , A H � �--r � � <br /> I <br /> QN,/ R I 6" R BASE OF <br /> BASE OF �� BASE OF I EXCAVATION _ <br /> EXCAVATION rj 1 EXCAVATION � QM 0.25•q <br /> I � (PS{) <br /> FOR m s 0.4 <br /> o = 0.28Q n� FOR m s 0.4 Q„ = LATERAL SURCHARGE PRESSURE <br /> „ H'(O.tr6+nZ)' vN= 0.2n•Q� FROM UNIFORM SURCHARGE <br /> H(O.t 6+n=)2 <br /> FOR m > 0.4 <br /> Q�� = 1.77Qvm' �_ �= 0.55Q� <br /> HZ(m'+n°)' FOR m > 0.4 <br /> v„ = aNC05�(1.16) oN= 1.28m= n•Q� <br /> H(m'+n')Z <br /> RESULTANT P„ = 0.64Q i <br /> M PHIQ 1 R � (mx+Q <br /> � PI -- 0� <br /> J <br /> 0.2 0.78 0.59H 3 QP M R <br /> B <br /> 0.4 0.78 0.59H o <br /> I � QN o.t o.SOH Recommended Surcharge Pressure <br /> 0.6 0.45 0.48H Q �� <br /> �� 0.3 0.60H <br /> ��x= m•H � Undergraduate Education Center <br /> o.s o.ssH Everett Community College <br /> SECTION A—A' <br /> o.� 0.48H �]EOENGINEERS� Figure5 <br /> Pressures from Point Load Qp <br /> � <br />