Application of equivalent continuum and discontinuum stress analyses in three-dimensions to investigate stability of a rock tunnel in a dam site in China

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Deformation and stability around a tunnel in a limestone rock mass is investigated using both (a) an equivalent continuum/discontinuum model and (b) a fully discontinuum model through three-dimensional stress analyses. In model (a), the Representative Elementary Volume (REV) mechanical properties estimated in a previous paper are used to represent the combined behavior of intact rock and 4 of the five fracture sets that had significantly smaller sizes compared to the fifth fracture set (bedding planes). To this system the bedding plane fractures were added according to its statistical geometric properties. In model (b), all five fracture sets were generated according to the obtained fracture geometry statistical models. Using model (a), effect of several factors, such as REV property values, bedding plane modeling method, the average horizontal stress to the vertical stress and tunnel depth, on the geotechnical behavior around the tunnel was studied in detail. A comparison is made between the stress analyses results obtained through the aforementioned two models.

Original languageEnglish (US)
Pages (from-to)48-68
Number of pages21
JournalComputers and Geotechnics
Volume46
DOIs
StatePublished - Nov 2012

Fingerprint

Dams
Tunnels
tunnel
dam
Rocks
bedding plane
rock
fracture geometry
Limestone
mechanical property
Mechanical properties
limestone
Geometry
modeling

Keywords

  • Equivalent continuum/discontinuum method
  • Fully discontinuum method
  • Rock tunnel stability
  • Three-dimensional stress analysis

ASJC Scopus subject areas

  • Computer Science Applications
  • Geotechnical Engineering and Engineering Geology

Cite this

@article{2dddb265da564cad92b041e5ade71e4d,
title = "Application of equivalent continuum and discontinuum stress analyses in three-dimensions to investigate stability of a rock tunnel in a dam site in China",
abstract = "Deformation and stability around a tunnel in a limestone rock mass is investigated using both (a) an equivalent continuum/discontinuum model and (b) a fully discontinuum model through three-dimensional stress analyses. In model (a), the Representative Elementary Volume (REV) mechanical properties estimated in a previous paper are used to represent the combined behavior of intact rock and 4 of the five fracture sets that had significantly smaller sizes compared to the fifth fracture set (bedding planes). To this system the bedding plane fractures were added according to its statistical geometric properties. In model (b), all five fracture sets were generated according to the obtained fracture geometry statistical models. Using model (a), effect of several factors, such as REV property values, bedding plane modeling method, the average horizontal stress to the vertical stress and tunnel depth, on the geotechnical behavior around the tunnel was studied in detail. A comparison is made between the stress analyses results obtained through the aforementioned two models.",
keywords = "Equivalent continuum/discontinuum method, Fully discontinuum method, Rock tunnel stability, Three-dimensional stress analysis",
author = "Qiong Wu and Pinnaduwa Kulatilake",
year = "2012",
month = "11",
doi = "10.1016/j.compgeo.2012.05.013",
language = "English (US)",
volume = "46",
pages = "48--68",
journal = "Computers and Geotechnics",
issn = "0266-352X",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Application of equivalent continuum and discontinuum stress analyses in three-dimensions to investigate stability of a rock tunnel in a dam site in China

AU - Wu, Qiong

AU - Kulatilake, Pinnaduwa

PY - 2012/11

Y1 - 2012/11

N2 - Deformation and stability around a tunnel in a limestone rock mass is investigated using both (a) an equivalent continuum/discontinuum model and (b) a fully discontinuum model through three-dimensional stress analyses. In model (a), the Representative Elementary Volume (REV) mechanical properties estimated in a previous paper are used to represent the combined behavior of intact rock and 4 of the five fracture sets that had significantly smaller sizes compared to the fifth fracture set (bedding planes). To this system the bedding plane fractures were added according to its statistical geometric properties. In model (b), all five fracture sets were generated according to the obtained fracture geometry statistical models. Using model (a), effect of several factors, such as REV property values, bedding plane modeling method, the average horizontal stress to the vertical stress and tunnel depth, on the geotechnical behavior around the tunnel was studied in detail. A comparison is made between the stress analyses results obtained through the aforementioned two models.

AB - Deformation and stability around a tunnel in a limestone rock mass is investigated using both (a) an equivalent continuum/discontinuum model and (b) a fully discontinuum model through three-dimensional stress analyses. In model (a), the Representative Elementary Volume (REV) mechanical properties estimated in a previous paper are used to represent the combined behavior of intact rock and 4 of the five fracture sets that had significantly smaller sizes compared to the fifth fracture set (bedding planes). To this system the bedding plane fractures were added according to its statistical geometric properties. In model (b), all five fracture sets were generated according to the obtained fracture geometry statistical models. Using model (a), effect of several factors, such as REV property values, bedding plane modeling method, the average horizontal stress to the vertical stress and tunnel depth, on the geotechnical behavior around the tunnel was studied in detail. A comparison is made between the stress analyses results obtained through the aforementioned two models.

KW - Equivalent continuum/discontinuum method

KW - Fully discontinuum method

KW - Rock tunnel stability

KW - Three-dimensional stress analysis

UR - http://www.scopus.com/inward/record.url?scp=84862762135&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862762135&partnerID=8YFLogxK

U2 - 10.1016/j.compgeo.2012.05.013

DO - 10.1016/j.compgeo.2012.05.013

M3 - Article

VL - 46

SP - 48

EP - 68

JO - Computers and Geotechnics

JF - Computers and Geotechnics

SN - 0266-352X

ER -