Next Article in Journal
Comparative Study of Seismic Design and Performance of OMRF Building Using Indian, British, and European Codes
Previous Article in Journal
Properties of Blast-Furnace Slag Cement Concrete Subjected to Accelerated Curing
Open AccessArticle

Safety Assessment of Tunnel Portals for Site Selection Based on Spatial Information Geoprocessing

Department of Civil Engineering, R.O.C. Military Academy, Kaohsiung 83059, Taiwan
Infrastructures 2019, 4(4), 70; https://doi.org/10.3390/infrastructures4040070
Received: 11 September 2019 / Revised: 4 November 2019 / Accepted: 7 November 2019 / Published: 11 November 2019
The evaluation of portal locations for mountain tunnels is among the most crucial considerations during route selection and structural layout planning. The development of spatial information technology has provided a more objective approach for assessing the slope stability of potential portal sites. The simulations in such studies have been performed to evaluate potential hazards and slope stability. However, potential instabilities resulting from excavation are seldom considered in these studies. Therefore, a method based on spatial information technology was developed in this study for considering the potential impact of the direction and depth of excavations on portal stability. An analysis method for an infinite slope was integrated into the geographical information system for evaluating the stability of critical wedges. The proposed method provides a reasonable estimation comparable with that provided by the conventional slice method. The results of applying this method to six mountain tunnel portals where slope instability occurred during construction indicate that the actual outcomes agreed with the predicted outcomes. For potential portal site evaluation, the proposed method facilitates the rapid estimation of safety factors for various slope designations, which is useful for site selection. View Full-Text
Keywords: site selection; safety factors; slope stability; tunnel portal location; limit equilibrium method; potential hazards assessment site selection; safety factors; slope stability; tunnel portal location; limit equilibrium method; potential hazards assessment
Show Figures

Graphical abstract

MDPI and ACS Style

Wang, I.-T. Safety Assessment of Tunnel Portals for Site Selection Based on Spatial Information Geoprocessing. Infrastructures 2019, 4, 70.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop