Abstract:

 To monitor the jet-grouting process and its effect is of great importance to the high pressure jet-grouting project, and the
high density electrical resistivity method  is one of  the most popularly used measures. Based on  the Archie
,
s law,  the monitoring
data are  transformed, pretreated and  inverted  to deduce  the variations of electrical resistivity with  time. Meanwhile,  the profiles
of electrical  resistivity during  the process of  jet-grouting are plotted. The  results show  that  the electrical  resistivity curves of
data points  for grouting matrix are parallel  to  those  for  the cement pastes, while  it  is not  the same  for  the non-grouting matrix.
Consequently,  this method could be widely used  in monitoring  the  jet-grouting process and detecting  its effect, which provides
some useful technological information to the visualized construction of underground projects.

Key words: high density electrical , resistivity method, high pressure , jet-grouting, dynamic monitoring, electrical , resistivity,
Archie’s law