Stability Analysis of Tunnel Face in Nonlinear Soil under Seepage Flow

2019 ◽  
Vol 23 (10) ◽  
pp. 4553-4563 ◽  
Author(s):  
Xiao-Li Yang ◽  
Jun-Hao Zhong
Keyword(s):  
Stability Analysis ◽  
Seepage Flow ◽  
Tunnel Face

Stability Analysis of the Nanjung Water Diversion Twin Tunnels based on Convergence Measurement

2019 ◽  
Vol 1 (1) ◽  
pp. 49-60
Author(s):  
Simon Heru Prassetyo ◽  
Ganda Marihot Simangunsong ◽  
Ridho Kresna Wattimena ◽  
Made Astawa Rai ◽  
Irwandy Arif ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Convergence Rate ◽  
Critical Strain ◽  
Convergence Rates ◽  
Strain Analysis ◽  
Water Diversion ◽  
Tunnel Face ◽  
Tunnel Stability ◽  
The Stability ◽  
Twin Tunnels

This paper focuses on the stability analysis of the Nanjung Water Diversion Twin Tunnels using convergence measurement. The Nanjung Tunnel is horseshoe-shaped in cross-section, 10.2 m x 9.2 m in dimension, and 230 m in length. The location of the tunnel is in Curug Jompong, Margaasih Subdistrict, Bandung. Convergence monitoring was done for 144 days between February 18 and July 11, 2019. The results of the convergence measurement were recorded and plotted into the curves of convergence vs. day and convergence vs. distance from tunnel face. From these plots, the continuity of the convergence and the convergence rate in the tunnel roof and wall were then analyzed. The convergence rates from each tunnel were also compared to empirical values to determine the level of tunnel stability. In general, the trend of convergence rate shows that the Nanjung Tunnel is stable without any indication of instability. Although there was a spike in the convergence rate at several STA in the measured span, that spike was not replicated by the convergence rate in the other measured spans and it was not continuous. The stability of the Nanjung Tunnel is also confirmed from the critical strain analysis, in which most of the STA measured have strain magnitudes located below the critical strain line and are less than 1%.

scholarly journals Validation of a New 2D Failure Mechanism for the Stability Analysis of a Pressurized Tunnel Face in a Spatially Varying Sand

2011 ◽  
Vol 137 (1) ◽  
pp. 8-21 ◽  
Author(s):  
Guilhem Mollon ◽  
Kok Kwang Phoon ◽  
Daniel Dias ◽  
Abdul-Hamid Soubra
Keyword(s):  
Stability Analysis ◽  
Failure Mechanism ◽  
Tunnel Face ◽  
The Stability ◽  
Spatially Varying

Stability analysis model for a tunnel face reinforced with bolts and an umbrella arch in cohesive-frictional soils

2020 ◽  
Vol 124 ◽  
pp. 103635 ◽  
Author(s):  
Xiao Zhang ◽  
Mingnian Wang ◽  
Zhilong Wang ◽  
Jiawang Li ◽  
Siguang Zhao ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Analysis Model ◽  
Tunnel Face ◽  
Umbrella Arch ◽  
Frictional Soils

Tunnel face stability analysis using Kinematical Element Method

2019 ◽  
Vol 85 ◽  
pp. 354-367 ◽  
Author(s):  
Mahmoud Qarmout ◽  
Diethard König ◽  
Peter Gussmann ◽  
Markus Thewes ◽  
Tom Schanz
Keyword(s):  
Stability Analysis ◽  
Tunnel Face ◽  
Face Stability ◽  
Tunnel Face Stability ◽  
Element Method
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