QI Chang-Guang, FAN Gao-feng, CUI Yun-liang, et al. Geotechnical physical model test using artificial synthetic transparent soil[J]. 2015, 36(11): 3157-3163.
QI Chang-Guang, FAN Gao-feng, CUI Yun-liang, et al. Geotechnical physical model test using artificial synthetic transparent soil[J]. 2015, 36(11): 3157-3163.DOI: 10.16285/j.rsm.2015.11.016.
By combining the technologies of particle image velocimetry (PIV) and close-range photogrammetry
a procedure for geotechnical physical modelling using artificial synthetic transparent soil is developed. The soil deformation caused by the shallow foundation settlement (SFS) are measured and recorded non-intrusively. The conventional model test using natural soils is employed for the purpose of comparison. The transparent soil is made of a pore solution
the refractive index of which is matched with the refractive index of fused quartz. Transparent soil model is sliced by using a laser light sheet and digital images of soil deformations caused by SFS are captured. The MATLAB-based software
Geo-PIV
is employed to obtain the generated displacement fields. The results show that the SFS-induced disturbance zone is enlarged in transparent soil
the maximum shear strain expands by about 1.5 times
and the range of surface heaving increases by 30-50% in transparent soil compared with those in natural soil; however
the movement trends of soil elements in transparent soils are generally similar to those in natural soils
indicating that the proposed modelling methodology has applicability to mechanism study to some extent.