This paper focused on the testing methods of the hydrogen embrittlement failure characterizations and the hydrogen embrittlement sensitivity, verified the feasibility of the incremental step loading test to measure the hydrogen embrittlement critical value, and conducted research on the tensile rate during the process of the tensile testing.

The precision of the model GM(1,1) can be improved by means of reciprocal accumulation generation transform for the original series and weighting operation of the background values of grey derivatives at the discrete points.

Considering multistage loadings,the settlement calculation formula is amended.

Based on the on the spot data coming from settlement on the soft soil foundation,a modified hyperbola consolidation model including instantaneous deformation under successive load is built,which fits either the once loading or the successive loading.