Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
TBM Tunneling Construction Time with Respect to Learning Phase Period and Normal Phase Period

E. Farrokh

Volume 11, Issue 2 , April 2020, , Pages 539-554


  In every tunnel boring machine (TBM) tunneling project, there is an initial low production phase so-called the Learning Phase Period (LPP), in which low utilization is experienced and the operational parameters are adjusted to match the working conditions. LPP can be crucial in scheduling and evaluating ...  Read More

Rock Mechanics
Introducing hard rock TBMs’ downtime analysis model with reference to past case histories’ data

E. Farrokh

Volume 9, Issue 2 , April 2018, , Pages 457-472


  The study of downtime and subsequently machine utilization in a given project is one of the major requirements of an accurate estimation of TBM performance and daily advance rate. Interestingly, while it is very common to report the components of downtime when discussing a tunneling project in the literature; ...  Read More

Estimation of penetration rate of tunnel boring machines using Monte-Carlo simulation method

H. Dehghani; N. Mikhak Beiranvand

Volume 7, Issue 2 , July 2016, , Pages 175-184


  One of the most important parameters used for determining the performance of tunnel boring machines (TBMs) is their penetration rate. The parameters affecting the penetration rate can be divided in two categories. The first category is the controllable parameters such as the TBM technical characteristics, ...  Read More