Interaction between tunnel supports and ground convergence-Consideration of seepage forces

Young Jin Shin, Ki Il Song, In Mo Lee, Gye Chun Cho

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Seepage forces can cause a significant threat to the safety of underwater tunnels because the seepage forces remain while the effective overburden pressure can be distributed by the arching effect during tunnel excavation. Although seepage forces are very influential in underwater tunnels and their support systems, the effects of seepage forces on the ground reaction curve of a tunnel reinforced with grouted bolts and grouting have yet to be clearly defined. Thus, in this paper, we first performed theoretical analyses on the ground reaction curve reinforced with grouted bolts and grouting by taking into consideration seepage forces under steady state, full drainage, and radial flow conditions. Secondly, we carried out mechanical-hydraulic coupled finite element numerical analyses for comparison with the theoretical analyses. The results show that the analytical solution is valid in a deep tunnel. Thirdly, we performed a parametric study of grouting reinforcement effects on the ground reaction curve considering seepage forces. The results show that the ground reaction curve with the consideration of seepage forces shows a greater radial displacement than that of a dry condition at the same internal pressure level because the seepage forces are applied to the tunnel section as an additional body force. The overall results suggest that the analytical solution of ground convergences considering the effect of seepage forces on tunnel supports presented in this study can be effectively used for the further realistic design of tunnels under groundwater.

Original languageEnglish
Pages (from-to)394-405
Number of pages12
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume48
Issue number3
DOIs
Publication statusPublished - 2011 Apr 1

Fingerprint

Seepage
seepage
Tunnels
tunnel
Grouting
grouting
bolt
Bolts
Radial flow
arching
radial flow
Electron tunneling
Excavation
overburden
Drainage
reinforcement
Groundwater
Reinforcement
excavation
Hydraulics

Keywords

  • Analytical and numerical study
  • Ground reaction curve
  • Grouted bolt
  • Grouting
  • Seepage forces

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Interaction between tunnel supports and ground convergence-Consideration of seepage forces. / Shin, Young Jin; Song, Ki Il; Lee, In Mo; Cho, Gye Chun.

In: International Journal of Rock Mechanics and Mining Sciences, Vol. 48, No. 3, 01.04.2011, p. 394-405.

Research output: Contribution to journalArticle

@article{ae3fa8b9e6ab4fe3b7991d268b625e34,
title = "Interaction between tunnel supports and ground convergence-Consideration of seepage forces",
abstract = "Seepage forces can cause a significant threat to the safety of underwater tunnels because the seepage forces remain while the effective overburden pressure can be distributed by the arching effect during tunnel excavation. Although seepage forces are very influential in underwater tunnels and their support systems, the effects of seepage forces on the ground reaction curve of a tunnel reinforced with grouted bolts and grouting have yet to be clearly defined. Thus, in this paper, we first performed theoretical analyses on the ground reaction curve reinforced with grouted bolts and grouting by taking into consideration seepage forces under steady state, full drainage, and radial flow conditions. Secondly, we carried out mechanical-hydraulic coupled finite element numerical analyses for comparison with the theoretical analyses. The results show that the analytical solution is valid in a deep tunnel. Thirdly, we performed a parametric study of grouting reinforcement effects on the ground reaction curve considering seepage forces. The results show that the ground reaction curve with the consideration of seepage forces shows a greater radial displacement than that of a dry condition at the same internal pressure level because the seepage forces are applied to the tunnel section as an additional body force. The overall results suggest that the analytical solution of ground convergences considering the effect of seepage forces on tunnel supports presented in this study can be effectively used for the further realistic design of tunnels under groundwater.",
keywords = "Analytical and numerical study, Ground reaction curve, Grouted bolt, Grouting, Seepage forces",
author = "Shin, {Young Jin} and Song, {Ki Il} and Lee, {In Mo} and Cho, {Gye Chun}",
year = "2011",
month = "4",
day = "1",
doi = "10.1016/j.ijrmms.2011.01.003",
language = "English",
volume = "48",
pages = "394--405",
journal = "International Journal of Rock Mechanics and Minings Sciences",
issn = "1365-1609",
publisher = "Elsevier BV",
number = "3",

}

TY - JOUR

T1 - Interaction between tunnel supports and ground convergence-Consideration of seepage forces

AU - Shin, Young Jin

AU - Song, Ki Il

AU - Lee, In Mo

AU - Cho, Gye Chun

PY - 2011/4/1

Y1 - 2011/4/1

N2 - Seepage forces can cause a significant threat to the safety of underwater tunnels because the seepage forces remain while the effective overburden pressure can be distributed by the arching effect during tunnel excavation. Although seepage forces are very influential in underwater tunnels and their support systems, the effects of seepage forces on the ground reaction curve of a tunnel reinforced with grouted bolts and grouting have yet to be clearly defined. Thus, in this paper, we first performed theoretical analyses on the ground reaction curve reinforced with grouted bolts and grouting by taking into consideration seepage forces under steady state, full drainage, and radial flow conditions. Secondly, we carried out mechanical-hydraulic coupled finite element numerical analyses for comparison with the theoretical analyses. The results show that the analytical solution is valid in a deep tunnel. Thirdly, we performed a parametric study of grouting reinforcement effects on the ground reaction curve considering seepage forces. The results show that the ground reaction curve with the consideration of seepage forces shows a greater radial displacement than that of a dry condition at the same internal pressure level because the seepage forces are applied to the tunnel section as an additional body force. The overall results suggest that the analytical solution of ground convergences considering the effect of seepage forces on tunnel supports presented in this study can be effectively used for the further realistic design of tunnels under groundwater.

AB - Seepage forces can cause a significant threat to the safety of underwater tunnels because the seepage forces remain while the effective overburden pressure can be distributed by the arching effect during tunnel excavation. Although seepage forces are very influential in underwater tunnels and their support systems, the effects of seepage forces on the ground reaction curve of a tunnel reinforced with grouted bolts and grouting have yet to be clearly defined. Thus, in this paper, we first performed theoretical analyses on the ground reaction curve reinforced with grouted bolts and grouting by taking into consideration seepage forces under steady state, full drainage, and radial flow conditions. Secondly, we carried out mechanical-hydraulic coupled finite element numerical analyses for comparison with the theoretical analyses. The results show that the analytical solution is valid in a deep tunnel. Thirdly, we performed a parametric study of grouting reinforcement effects on the ground reaction curve considering seepage forces. The results show that the ground reaction curve with the consideration of seepage forces shows a greater radial displacement than that of a dry condition at the same internal pressure level because the seepage forces are applied to the tunnel section as an additional body force. The overall results suggest that the analytical solution of ground convergences considering the effect of seepage forces on tunnel supports presented in this study can be effectively used for the further realistic design of tunnels under groundwater.

KW - Analytical and numerical study

KW - Ground reaction curve

KW - Grouted bolt

KW - Grouting

KW - Seepage forces

UR - http://www.scopus.com/inward/record.url?scp=79952622267&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952622267&partnerID=8YFLogxK

U2 - 10.1016/j.ijrmms.2011.01.003

DO - 10.1016/j.ijrmms.2011.01.003

M3 - Article

VL - 48

SP - 394

EP - 405

JO - International Journal of Rock Mechanics and Minings Sciences

JF - International Journal of Rock Mechanics and Minings Sciences

SN - 1365-1609

IS - 3

ER -