Through electrical resistivity experiments and geotechnical experiments

the characteristics of electrical resistivity of thick soft soil layer and the correlativity between electrical resistivity and engineering mechanical parameters in the foundation of Suzhou-Nantong Yangtze River Bridge in China’s Jiangsu Province

were studied. It was found that

firstly

in CZK30 bore

from clay→powdery sand→thin sand→medium and coarse sand

the electrical resistivity of soil sample increased gradually

the electrical resistivity decreased with the increase of water content

void ratio and saturation

and increased with the increase of the vertical and horizontal infiltration coefficient

compression modulus and standard penetration test (STP); secondly

in CZK30 bore

electrical resistivity of clay soil decreased with the increase of the water content

void ratio

saturation

compression coefficient

liquid coefficient

and increased with the increase of compression modulus and cohesion; thirdly

through linear and polynomial fit

the mathematic expressions between electrical resistivity and engineering mechanical parameters of soil were offered

and the correlativity coefficients were high (larger than 0.88 mostly). The following conclusions can be drawn that there exist affinity between electrical resistivity and other physical and mechanical parameters.