Question

Terzaghi's conventional theory of consolidation predicts primary consolidation ony. List at least three soil conditions for which this theory is not applicable. -2 List at least six assumptions made during derivation of Terzaghř's conventional theory of consolidation. What is an overconsolidated clay and what causes the overconsolidation? Give three possible causes. 6-3 6-4 Why may lowering groundwater table induce settlement?

Answer 1

6-I Fegaghis Consolidation theoィ 恥佩apploablo

6-2 Assum ptions in Tergaghi's "Theory Consolicdation Assunptionz mode in the derivation Ter a9hi's Consolidation gquation.ans一 I. The Soil is hormoeneous and Saturated ul 2. Soil Paticles and pore wate v are i nCompvessible 3. The low &watey cluring Epulsion dliveetion, ie ConSolication in ane one di mensional (ID . The chan in Ndurre 웅 soil due to Consolidlat ion is naglgible Cerm parea to the intial volume s soil. permeability Same throughout the thiccness the Compre ssi ble Soil larer

over consolidated clay 6-5 Th the Current Stfective stress is less clan Said to be、oVet(Consolidated"(cc) Pre consolidation stress is debind to be than the PreConsolidatedl styess then the the marimum tective stvess Enperiencad by the Soi / (01) # The Sail bohose present Ebbective Overbundm Pressure ys less than that Dhich ナhe Soil is garer ienced in the past込Callao ovesConsolidated soil be Corne oVeY Con Solidhted Extra looding from There ave mary processesthat Cose the soil a st Such as storage tanc shich has bean Sinco Yamoed 2) Bytising ground heater tabto.ノ shich increase the frove E.tensi ve "Ye Cuth in the decre age Ekvation water pre csunz ugんch ground surbace 3) eYosionaǐCyCovation

ㄥ〇uoevingy gYounJhoten(table Canaud e the Soil to Con Solidlate , Shich may indute setta an So t Compressible Soils Can beCome lar