The relationship between generalized preconsolidation pressure and brittle-ductile transition pressure in sedimentary soft rock

In this study, we investigated the preconsolidation pressure (P C) of sedimentary soft rock and its relationship with brittle-ductile transition (BDT) pressure. We proposed a generalized G) suitable for both soil rock, which is defined in terms yield stress initial sediment structure under confined lateral compression. then explored digenetic effect on P G using 24 types. Next, BDT were verified compression conventional triaxial tests, respectively, red-bed Dingxi region China. Finally, discussed mechanism analyzed between two characteristic pressures given surface considered structural strength. found that was dependent strength parameters, strength, coefficient earth at rest. The findings study will have significant impact determination future studies.