• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
成果搜索

author:

Cao, Yangbing (Cao, Yangbing.) [1] (Scholars:曹洋兵) | Zhang, Yaoyao (Zhang, Yaoyao.) [2] | Liu, Zhi (Liu, Zhi.) [3] | Bao, Min (Bao, Min.) [4]

Indexed by:

EI Scopus SCIE

Abstract:

The existence of kaolinite inside the granite joints reduces the direct contact between the jointed rock walls, which is an unfavorable factor for the stability of underground engineering. However, there are limited studies addressing kaolinite-filled granite joints of different filling degrees (the ratio of filling thickness t to the maximum fluctuation height a of the joint surface (t/a)) even to this day, and the shear failure mechanisms of kaolinite-filled joints remain unclear. Direct shear tests of kaolinite-filled joints with different filling degrees are carried out in this study, and the acoustic emission (AE) activities during the shearing are real-timely monitored. The results show that the filling degree has a significant influence on the shear properties and AE characteristics of kaolinite-filled joints. With the increase of the filling degree, the shear stress drop is less significant, and the normal deformation gradually transitions from "first shear contraction and then shear dilation" to "shear contraction", which is accompanied by the weakening of AE signals. The increase in filling degree allows a transition of the joint behavior from the asperity-dominated damage mode to the kaolinite-dominated shear sliding mode. Moreover, the filling degree is correlated with the joint roughness coefficient (JRC) in the form of an exponential function to modify Barton's shear strength criterion. The present study gets insights into the shear failure mechanisms of kaolinite-filled joints with various filling degrees and helps interpret the field observations.

Keyword:

Acoustic emission Direct shear test Filling degree Joint shear Kaolinite-filled joints

Community:

  • [ 1 ] [Cao, Yangbing]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Zhang, Yaoyao]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Liu, Zhi]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Bao, Min]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China
  • [ 5 ] [Cao, Yangbing]Minist Nat Resources, Key Lab Geohazard Prevent Hilly Mt, Fujian Key Lab Geohazard Prevent, Fuzhou 350002, Fujian, Peoples R China

Reprint 's Address:

  • 曹洋兵

    [Cao, Yangbing]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Fujian, Peoples R China

Show more details

Related Keywords:

Source :

KSCE JOURNAL OF CIVIL ENGINEERING

ISSN: 1226-7988

Year: 2024

Issue: 7

Volume: 28

Page: 2966-2981

1 . 9 0 0

JCR@2023

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

Online/Total:8409/10509880
Address:FZU Library(No.2 Xuyuan Road, Fuzhou, Fujian, PRC Post Code:350116) Contact Us:0591-22865326
Copyright:FZU Library Technical Support:Beijing Aegean Software Co., Ltd. 闽ICP备05005463号-1