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

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24Considerations when planning the vibrocompaction are similar to those of dynamiccompaction. These include determination of the treatment extent and depth as well as thedegree of required improvement. The specification for the performance of fill densificationby vibrocompaction is also similar to that of dynamic compaction, given in Section 2.8.5.2.8.5 Specification for Fill DensificationThe degree of improvement or performance of fill densification may be revealed by therelative density achieved. Relative density is a useful way to characterize the density ofgranular soil and is defined as:maxminor D r= l^L x d "** xlOO%Yd Yd max / d minwhere e min = void ratio of the soil in densest condition
depth/density profile requires careful consideration to avoid over orspecification.2.8.6 Other Fill TreatmentThe vibro-replacement and soil mixing techniques mentioned In Section 2.6.7 may also beapplied to fill treatment. These techniques are useful where culverts, pipelines or low-risestructures need to be supported.2.9 Seawall ConstructionGuidance on the design of seawalls, normally accompanying a reclamation project, is givenin Part 4 of the Manual - Guide to Design of Seawalls and Breakwaters.The reclamation sequence can be affected by the construction of the seawalls.these aspects which should be investigated in the reclamation design include:Some of® In the case of a drained reclamation, filling works adjacent to an uncompletedseawall foundation can adversely affect the stability of the reclamation and leadto slip failure. The foundation should be completed before fill placementadjacent to it proceeds.• Rapid fill placement behind a recently completed seawall, particularly whenclay or silt remains at the bottom of the seawall foundation, can induceinstability in the reclamation, as the dissipation of the excess pore waterpressure due to the fill loading cannot normally be completed within a shortperiod.® Consideration may be given to forming a bund after the construction of theseawall and placement of filter material, using selected granular material wherepossible, along the line of and immediately behind the seawall. Such a bundassists in stabilizing the seawall and its foundation If mud waves occur duringfilling.
Page 3 and 4: PORT WORKS DESIGN MANUALPART 3Guide
Page 5 and 6: FOREWORDThe Port Works Design Manua
Page 7 and 8: CONTENTSTITLE PAGE - !FOREWORD 3CON
Page 9: PageNo.5.3.3 Verification of Settle
Page 12 and 13: 101.2 Definition, Symbols and Refer
Page 14 and 15: 12the investigations may need to co
Page 16 and 17: 14consequences of adopting a partic
Page 18 and 19: 16(3) Installation of vertical drai
Page 20 and 21: 18The remaining layer of marine or
Page 22 and 23: 20• The rate of supply of public
Page 24 and 25: 22the shortage of public filling ca
Page 28 and 29: 262.10 Environmental ImpactsAll rec
Page 31 and 32: 293.3.1 GeneralThe reclamation sequ
Page 33 and 34: 31requires checking of the equilibr
Page 35 and 36: 33(2) Detailed Stability AnalysisTh
Page 37 and 38: 3.4 WorksIf, despite all the precau
Page 39 and 40: 374.4.1 GeneralThis chapter discuss
Page 41 and 42: 3943.2 due toThe ultimate primary c
Page 43 and 44: 41where S pt(residml) = Residual se
Page 45 and 46: Design of surcharge preloading gene
Page 47 and 48: 45H = Fill thickness.a = Logarithmi
Page 49: 47The calculation of residual settl
Page 52 and 53: 50For monitoring of pore pressure d
Page 54 and 55: 525.3.2 of FillThis section discuss
Page 56 and 57: 54the availability of frequent moni
Page 58 and 59: 56reduce settlement problems. Howev
Page 61 and 62: 59REFERENCESAsaoka, A (1978). Obser
Page 63: 61FIGURES
Page 67 and 68: 65(1) Geotextile-\I,- i i i i i , ,
Page 69 and 70: 67Figure 5 - Method of Calculation
Page 71 and 72: 69timet + 120Piezometer installed a
Page 73 and 74: 71Slope >1Required pause in fill pl
Page 75: 73APPENDIX APREFABRICATED BAND DRAI
Page 78 and 79:
76List of ASTMD4491-92: Standard Te
Page 81:
79CONTENTSTITLE PAGE 77CONTENTS 79B
Page 84 and 85:
82t = Time from load application.c
Page 86 and 87:
84Hansbo, S. (1981).Consolidation o
Page 89 and 90:
87CONTENTSTITLE PAGE 85CONTENTS 87C
Page 91 and 92:
89C OF BY ASAOKA'S METHODC.IGeneral
Page 93:
91OFFigureNo.PageNo.C1 Asaoka's Gra
Page 96 and 97:
94SiFinal settlementPlacement of. a
Page 99:
97CONTENTSTITLE PAGE 95CONTENTS 97D
Page 102 and 103:
1000.3(8.9)(3 2 )(1. 2) - 2.8836L e
Page 104 and 105:
102Vertical drains dataTypeSpacingP
Page 106 and 107:
104The final primary consolidation
Page 108 and 109:
106The initial effective stress at
Page 110 and 111:
108Table D2.6m0123M0.5711.5712.5713
Page 112 and 113:
110Effective stress increment at en
Page 114 and 115:
112(3) Settlement due to secondary
Page 116 and 117:
114The value ofF(n) in Example D.2
Page 118 and 119:
116
Page 120 and 121:
118CD~5COCOCDCLCD20 -14.9Required p
Page 122 and 123:
120
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122state value.Mud wave. Excessive
Page 126 and 127:
124
Page 128 and 129:
126dd'D ree 0e maxe minFHI pK aLeng
Page 130 and 131:
128
Page 132:
X1S1SD112HK 627.5 P83Port works des
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