Một số kết quả quan trắc biến động thấm trong cấu trúc đê bằng công nghệ địa điện đa cực và phân cực kích thích

Abstract

SUMMARY
Monitoring results on permeable changes of dike structure by geoelectrical multi-electrods induced polarisation technology
This paper presents a part of dike monitoring system to observe dike structure by geo-electrical multi-electrodes technology and induced polarization, which has been installed at significant weak points of
the Red River’s dike in Thai Binh province.
The primary results show : a) The monitoring system with the electrodes array installed at dike body is operating smoothly ; b) The daily changes on resistivity structure of dike’s soil layers at the flooding time were small, from -20 to +5 % ; Monthly changes determined from -65 to +15 % in comparison those in the dry time ; c) Based on the observed resistivity images the permeable changes from the river through the dike body at flooding time have been determined.