Open AccessShear strength assessments of residual soil for Ia Pet wind power project in Vietnam
Author(s) -
Kuanjun Wang,
Linxian Li,
Kanmin Shen,
Lili Ma,
Junwu Jin,
Ting Shi
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/787/1/012130
Subject(s) - geotechnical engineering , residual , silt , direct shear test , shear (geology) , residual strength , triaxial shear test , shear strength (soil) , geology , soil water , mathematics , soil science , engineering , structural engineering , geomorphology , petrology , algorithm
The geotechnical parameters are of great importance in wind turbine foundation design. As a case study, laboratory test results of Ia Pet wind power project in Vietnam were analysed to accurately estimate the strength of residual soil, which is classified as high plasticity silt (MH). Due to sample disturbance, the undrained shear strength s u from triaxial unconsolidated undrained shear test (UU) is absolutely underestimated, while s u from direct quick shear tests (DSq) and triaxial consolidated undrained shear test (CU) are more representative. Good linear correlations have been found between soil depth and strength obtained from DSq and CU tests. The normalised undrained shear strengths s u / σ v0 ’ indicate that the residual soil at 0m to 8m is heavily overconsolidated, where s u / σ v0 ’ is larger than 0.4. Furthermore, the normalised undrained shear strengths s u / σ v0 ’ presented negative linear correlation of liquidity index, which can be used to quick and cautious estimate the strength of Ia pet residual soil in the future by using liquidity index. The undrained shear strength evaluation using liquidity index is in good agreement with DSq and CU test results, which preliminarily verifies the applicability of expression between s u / σ v0 ’ and I L .