TY - JOUR
T1 - A study of the compressibility behavior of peat stabilized by DMM
T2 - Lab model and FE analysis
AU - Huat, Bujang B.K.
AU - Kazemian, Sina
AU - Prasad, Arun
AU - Barghchi, Maassoumeh
PY - 2011/1/4
Y1 - 2011/1/4
N2 - Peats are considered as extremely soft, unconsolidated deposits. These soils are geotechnically problematic, due to their high compressibility and low shear strength. Cement is widely used for the stabilization of peat by deep mixing method (DMM). This paper presents the results of the model study of compressibility properties of fibrous, hemic and sapric peats, stabilized with columns formed by DMM. The columns were formed of peat, treated with cement in different proportions. Rowe cell tests were performed after curing the samples for 28 days, to evaluate the compressibility characteristics. The results showed that the compressibility properties of peat can be improved significantly by the installation of cement stabilized columns. The amount of cement used to form the column and its diameter were observed to influence the engineering behavior of peats. The effect of cement was the highest on sapric peat among all, due to its physico-chemical properties. The results of Rowe cell were used to simulate the consolidation behavior using finite element software, PLAXIS and the results agree well. The parameters from the simulated model behavior were used to predict the ultimate bearing capacity of peat with full size cement stabilized columns.
AB - Peats are considered as extremely soft, unconsolidated deposits. These soils are geotechnically problematic, due to their high compressibility and low shear strength. Cement is widely used for the stabilization of peat by deep mixing method (DMM). This paper presents the results of the model study of compressibility properties of fibrous, hemic and sapric peats, stabilized with columns formed by DMM. The columns were formed of peat, treated with cement in different proportions. Rowe cell tests were performed after curing the samples for 28 days, to evaluate the compressibility characteristics. The results showed that the compressibility properties of peat can be improved significantly by the installation of cement stabilized columns. The amount of cement used to form the column and its diameter were observed to influence the engineering behavior of peats. The effect of cement was the highest on sapric peat among all, due to its physico-chemical properties. The results of Rowe cell were used to simulate the consolidation behavior using finite element software, PLAXIS and the results agree well. The parameters from the simulated model behavior were used to predict the ultimate bearing capacity of peat with full size cement stabilized columns.
KW - Bearing capacity
KW - Cement column
KW - Compressibility
KW - Finite element analysis
KW - Peat
UR - http://www.scopus.com/inward/record.url?scp=79951898429&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:79951898429
SN - 1992-2248
VL - 6
SP - 196
EP - 204
JO - Scientific Research and Essays
JF - Scientific Research and Essays
IS - 1
ER -