Limitations of Conventional Analysis of Consolidation Settlement

Duncan, James M.

doi:10.1061/(asce)0733-9410(1993)119:9(1333)

Cited by 123 publications

(52 citation statements)

References 9 publications

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“…The K0-consolidation (Watabe et al, 2003) and undrained shear strength (Watabe and Tsuchida, 2001;Watabe et al, 2002) were also studied. The consolidation settlement of the airport was discussed by many researchers (e.g., Nakase, 1987;Duncan, 1993;Akai, 2000;Mimura and Jang, 2005). Recently, Kobayashi et al (2005) developed a new reasonable analysis method in which they coupled the one-dimensional vertical consolidation for the clay layers and the twodimensional seepage for the sand layers.…”

Section: Introductionmentioning

confidence: 99%

Strain Rate Effect on Long-Term Consolidation of Osaka Bay Clay

Watabe

Udaka²,

Morikawa

2008

Soils and Foundations

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Section: Introductionmentioning

confidence: 99%

Strain Rate Effect on Long-Term Consolidation of Osaka Bay Clay

Watabe

Udaka²,

Morikawa

2008

Soils and Foundations

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“…How ever, in put as sump tions made in for mu lat ing this the ory are dif fi cult to meet in prac tice. Thus, as the pro cess pro gressed, nu mer ous ex per i men tal nonconformities were noted in re la tion to the o ret i cal so lu tions (Duncan, 1993;Dobak, 1999). Other noted ob ser va tions were: va ri ety of c v re sults de pend ent on the in ter pre ta tion method, and fur ther de vel op ment of per me abil ity-con sol i da tion the ory by changes in bound ary con di tions (Poskitt, 1969;Mikasa and Takada, 1986).…”

Section: Theoretical Solutions Evaluation Of Permeability-consolidatimentioning

confidence: 99%

Evaluation of soil permeability from consolidation analysis based on Terzaghi’s and Biot’s theory

Dobak

Gaszyński

2014

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1 Uni ver sity of War saw, Fac ulty of Ge ol ogy, ¯wirki i Wigury 93, 02-089 Warszawa, Po land 2 Cra cow Uni ver sity of Tech nol ogy, Fac ulty of En vi ron men tal En gi neer ing, Warszawska 24, 30-155 Kraków, Po land Dobak, P., Gaszyñski, J., 2015. Eval u a tion of soil per me abil ity from con sol i da tion anal y sis based on Terzaghi's and Biot's theories. Geo log i cal Quar terly, 59 (2): 373-381, doi: 10.7306/gq.1197Proper eval u a tion of per me abil ity pa ram e ters has a cru cial sig ni fi ca tion in multi-scale pre dic tion of con sol i da tion. Drain age path is con nected with the time of one-di men sional con sol i da tion in Terzaghi's the ory and nu mer ous later so lu tions. That is why the eval u a tion of per me abil ity fac tor al lows to model the set tle ment's time of geo log i cal lay ers based on re sults ob tained on a lab o ra tory scale. Nu mer ous tests show a dif fer ence of the con sol i da tion de gree ob tained from one-di men sional strain course and pore pres sure dis tri bu tion. Eval u a tion of con sol i da tion co ef fi cient c v based on a newly pro posed method al lows better un der stand ing of the ba sic rea sons of un con ven tional be hav iour of tested soils. Un paral lel char ac ter is tics of strain and pore pres sure dis tri bu tion show im por tant role of soil's skel e ton creep and its re la tion to per me abil ity as pects. So lu tions pro posed by Biot's the ory al low ana lys ing the dif fer ent ve loc ity of strain and pore pres sure dis tri bu tion. The ar ti cle pres ents a new ap prox i mated method based on Terzaghi's the ory and eval u a tion of pa ram e ters which are nec es sary in ap pli ca tion of Biot's one-di men sional so lu tion. These pa ram e ters are con nected with com press ibil ity and co ef fi cient of per me abil ity. The goal of pre sented meth od olog i cal stud ies is com par i son be tween per me abil ity ob tained from ap pli ca tion of Terzaghi's and Biot's theories. It al lows try ing to ex plain phys i cal rea sons of dif fer ences be tween ap plied mod els and test ing re sults, and improv ing the meth od ol ogy of one-di men sional con sol i da tions tests. Key words: con sol i da tion, co he sive soils, Terzaghi's the ory, Biot's the ory, per me abil ity, geo log i cal bar ri ers, in su la tion proper ties.

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“…Moreover, consolidation settlement is a three-dimensional problem, especially for stratified soil deposits. The limitations of conventional one-dimensional consolidation analysis have been reported elsewhere (Duncan, 1993). In view of this, determination of more practical approach based on field measurements is both timely and imperative.…”

Section: Introductionmentioning

confidence: 96%

Field Data Based Method for Predicting Long-Term Settlements

Jiang¹,

Chen²,

Nimbalkar³

2016

American Journal of Engineering and Applied Sciences

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Abstract:The estimation of the long-term foundation settlement in soft soil is very complex, which is attributed to a number of uncertainties associated with various factors, such as: (i) The compressibility parameters obtained in the laboratory from samples of relatively small size that are more homogeneous compared to heterogeneous field sediments in which various soil types may be interlayered at random and may occur without exhibiting any real stratification; (ii) limitations and unrealistic assumptions prevailing in the conventional consolidation analysis. These have often resulted in the large discrepancy between actual in-situ settlements and the predictions from the conventional consolidation models (e.g., Terzaghi's model). In this study, a field data based method inspired from an observational approach is proposed and validated against a number of high quality long-term field settlement data. Moreover, the corresponding geological soil properties obtained from field and laboratory tests have been presented, with the aim of providing useful practical references for other projects with similar geological profile. Furthermore, the proposed model is compared with existing prediction models. The results show that the newly proposed model can provide more reliable and accurate prediction of foundation settlements compared with other methods established in practice.

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Limitations of Conventional Analysis of Consolidation Settlement

Cited by 123 publications

References 9 publications

Strain Rate Effect on Long-Term Consolidation of Osaka Bay Clay

Strain Rate Effect on Long-Term Consolidation of Osaka Bay Clay

Evaluation of soil permeability from consolidation analysis based on Terzaghi’s and Biot’s theory

Field Data Based Method for Predicting Long-Term Settlements

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