THE RELATIONSHIP BETWEEN GENERALIZED PRECONSOLIDATION PRESSURE AND BRITTLE-DUCTILE TRANSITION PRESSURE IN SEDIMENTARY SOFT ROCK

LONGLONG LV; HONGJIAN LIAO; LI SONG; HANGZHOU LI; YINGPENG FU

doi:10.1590/1679-78256347

THE RELATIONSHIP BETWEEN GENERALIZED PRECONSOLIDATION PRESSURE AND BRITTLE-DUCTILE TRANSITION PRESSURE IN SEDIMENTARY SOFT ROCK

Authors

LONGLONG LV SCHOOL OF HUMAN SETTLEMENTS AND CIVIL ENGINEERING, XI’AN JIAOTONG UNIVERSITY, XI’AN, 710049, CHINA HTTPS://ORCID.ORG/0000-0002-7316-6103
HONGJIAN LIAO SCHOOL OF HUMAN SETTLEMENTS AND CIVIL ENGINEERING, XI’AN JIAOTONG UNIVERSITY, XI’AN, 710049, CHINA HTTPS://ORCID.ORG/0000-0001-5014-035X
LI SONG SCHOOL OF HUMAN SETTLEMENTS AND CIVIL ENGINEERING, XI’AN JIAOTONG UNIVERSITY, XI’AN, 710049, CHINA HTTPS://ORCID.ORG/0000-0002-6016-3405
HANGZHOU LI SCHOOL OF HUMAN SETTLEMENTS AND CIVIL ENGINEERING, XI’AN JIAOTONG UNIVERSITY, XI’AN, 710049, CHINA HTTPS://ORCID.ORG/0000-0002-5859-1873
YINGPENG FU SCHOOL OF HUMAN SETTLEMENTS AND CIVIL ENGINEERING, XI’AN JIAOTONG UNIVERSITY, XI’AN, 710049, CHINA HTTPS://ORCID.ORG/0000-0002-0848-3209

DOI:

https://doi.org/10.1590/1679-78256347

Abstract

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 PRECONSOLIDATION PRESSURE (P_G) SUITABLE FOR BOTH SOIL AND SEDIMENTARY SOFT ROCK, WHICH IS DEFINED IN TERMS OF THE YIELD STRESS OF THE INITIAL SEDIMENT STRUCTURE UNDER CONFINED LATERAL COMPRESSION. WE THEN EXPLORED THE DIGENETIC EFFECT ON P_G USING 24 SEDIMENT TYPES. NEXT, P_G AND BDT PRESSURE WERE VERIFIED USING CONFINED COMPRESSION AND CONVENTIONAL TRIAXIAL TESTS, RESPECTIVELY, ON RED-BED SOFT ROCK IN THE DINGXI REGION OF CHINA. FINALLY, WE DISCUSSED THE BDT MECHANISM AND ANALYZED THE RELATIONSHIP BETWEEN THE TWO CHARACTERISTIC PRESSURES FOR A GIVEN INITIAL YIELD SURFACE CONSIDERED STRUCTURAL STRENGTH. WE FOUND THAT THE RELATIONSHIP WAS DEPENDENT ON THE STRENGTH PARAMETERS, THE INITIAL STRUCTURAL STRENGTH, AND THE COEFFICIENT OF EARTH PRESSURE AT REST. THE FINDINGS OF THIS STUDY WILL HAVE A SIGNIFICANT IMPACT ON THE DETERMINATION OF BDT PRESSURE OF SEDIMENTARY ROCK IN FUTURE STUDIES.

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Published

2021-03-31

Issue

Vol. 18 No. 4 (2021)

Section

Articles

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