Results 81 to 90 of about 69,031 (338)

Frequency-Domain Full-Waveform Inversion Based on Tunnel Space Seismic Data

open access: yesEngineering, 2022
Tunnel seismic detection methods are effective for obtaining the geological structure around the tunnel face, which is critical for safe construction and disaster mitigation in tunnel engineering.
Mingyu Yu   +4 more
doaj  

The Potential Use of Ground Conductivity Meters to Identify the Location of Seepages—Case Study of the Maniów Levee Near Krakow, Poland

open access: yesGeosciences, 2020
This paper presents an assessment of the potential usefulness of the Ground Conductivity Meter (GCM) method to locate seepage pathways in the Maniow levee zone near Kraków, Poland.
Wojciech Klityński   +2 more
doaj   +1 more source

Photogrammetric documentation in tunneling

open access: yesCivil Engineering Design, EarlyView.
Abstract Photogrammetric surveys for geological excavation documentation are standard practice in tunnel construction, benefiting from the sector's ongoing digitalization. However, the application of photogrammetry often remains confined to geological assessments. By creating comprehensive 3D models of excavated tunnels, it is also possible to evaluate
Andreas Zani   +2 more
wiley   +1 more source

On the Correct Use of Statistical Tests: Reply to "Lies, damned lies and statistics (in Geology)" [PDF]

open access: yesEos Transactions AGU, Vol. 92, No. 8, page 64, 22 February 2011, 2010
In a Forum published in EOS Transactions AGU (2009) entitled "Lies, damned lies and statistics (in Geology)", Vermeesch (2009) claims that "statistical significant is not the same as geological significant", in other words, statistical tests may be misleading. In complete contradiction, we affirm that statistical tests are always informative. We detail
arxiv   +1 more source

Seismic Exploration Methods for Structural Studies and for Active Fault Characterization: A Review

open access: yesApplied Sciences, 2023
In this paper, seismic exploration methods are reviewed with a particular emphasis on the use of the reflection seismology to investigate the subsurface structures and characterize active faults.
Pier Paolo G. Bruno
doaj   +1 more source

Robust Self‐Healing Metallo‐Supergels of Folic Acid: Potential Sustainable Gelator for Oilfield Applications

open access: yesChemistry – A European Journal, EarlyView.
In combination with a large group of various metal salts folic acid (FA) forms mechanically robust metallogels with rapid recovery and self‐healing properties. These versatile gel systems provide tunable stiffness, with up to 95% of stiffness restored within 1 min.
Mahya Asgharian Marzabad   +5 more
wiley   +1 more source

Evaluating the feasibility of using a rapeseed oil‐derived anionic polymeric surfactant for enhanced oil recovery from carbonate/sandstone composite reservoirs

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
The experimental procedure for evaluating the rapeseed oil‐based polymeric surfactant in enhanced oil recovery. Abstract This study aims to investigate enhanced oil recovery from carbonate/sandstone composite (CSC) reservoirs using a negative‐charged rapeseed oil‐based polymeric surfactant.
Iman Nowrouzi   +2 more
wiley   +1 more source

Lacustrine and fan‐delta sediments in syn‐rift lake basins

open access: yesThe Depositional Record, EarlyView.
A consistent model for the sequence framework and depositional pattern of asymmetric half‐grabens in syn‐rift lake basins bounded by active faults has been established, complementing existing models for marine rift successions. Syn‐rift lake basins are characterised by relatively small dimensions, steep slopes, poorly developed shoreline strata ...
Qianyou Wang   +6 more
wiley   +1 more source

Analysis of squeezing‐induced failure in a water tunnel and measure of rehabilitation: A case study of Tishreen tunnel, Syria

open access: yesDeep Underground Science and Engineering, EarlyView.
Different failure modes observed in Tishreen tunnel include Floor heave, wall spalling, crashing of slab, and lining convergence reaching the failure limit. Abstract Squeezing phenomena can lead to severe loads in deep tunnels, especially in the presence of a low ratio of surrounding rock strength to overburden pressure.
Mohannad Mhanna, Hussein Hadi Hussein
wiley   +1 more source

Seismic performance of concrete tunnel–sand–pile interaction by the shake table test

open access: yesDeep Underground Science and Engineering, EarlyView.
This research presents the square root sum of squares response of displacements and tunnel moments under the Kobe and Loma Prieta seismic excitations with a peak ground acceleration of 0.05 g for various dry relative densities of local sand in Bangladesh.
Md. Foisal Haque, Mehedi A. Ansary
wiley   +1 more source

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