PORT WORKS DESIGN MANUAL PART 3 Guide To - The University ...

110Effective stress increment at end of 9.5 months = 105.6 kN/m 2 (see Table D2.5)As only 97.3% pore water pressure is dissipated at end of 22 ndthereforemonth (see Table D2.7),ACT, v, z=0.5m, 22th month= 105.6 + (208.3 -105.6) x 0.973 - 205.5 kN/m 2From Equation 4.la, the primary consolidation settlement in the first layer (H = 1.0m foreach sub-layer) due to the loading of reclamation fill and surcharge preloading (with verticaldrains) is given by:, 22th month = HCR 1(3 g(^vn ! +Acr V7=0 _ 5ni _ 22lvO "^ ^,2=0.5m, 22nd month •'vO= 0.54m2.95The settlement for the primary consolidation settlement due to reclamation fill and surchargepreloading (with vertical drains) at the time of surcharge removal (end of the 22 nd month) forall the sub-layers are calculated as follows:Table D2.8Sub-layer12345678910z(mPD)-8.5-9.5-10.5-11.5-12.5-13.5-14.5-15.5-16.5-17.5Initialeffective stress(kN/m 2 )2.958.8514.7520.6526.5532.4538.3544.2550.1556.05Effective stressincrement(kN/m 2 )205.5198.9194.4192.5191.9191.9192.5194.4198.9205.5TotalSettlement atthe end of 22 ndmonth (m)0.540.400.330.290.270.240.230.210.200.192.90The total consolidation settlement due to reclamation fill and surcharge preloading (withvertical drains) at the end of the 22 nd month is estimated to be 2.9 m.