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Pilot project: applying the Tunnel-in-Tunnel method on DB electrified routes [PDF]
E3S Web of Conferences, 2023 This report deals with the refurbishing of the Petersberg Tunnel. In this connection, for the first time within the scope of the pilot project, the tunnel-in-tunnel method was applied on an electrified line belonging to the DB.
Mähner Dietmar
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Advances in Civil Engineering, 2022 To study the effect of length-diameter ratio and mudcake on the bearing capacity of bored cast-in-place piles, the indoor model test and finite element numerical simulation method were used to carry out the loading test of piles under different mudcake ...
Peisheng Xi, Mengxuan Kan, Yang Liu
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Applied Sciences, 2023 It is difficult to adapt traditional screw motors with rubber stators to the high-temperature and high-pressure conditions in ultra-deep wells, where rubber stators age, deform and carbonize, resulting in motor failure.
Xin Fang +6 more
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Abnormal variation of P-wave velocity of red sandstone after cyclical thermal shock in water
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023 Hot dry rock (HDR) has great development potential because of its advantages of clean, environmental protection and renewable. The study of physical and mechanical properties of HDR is one of the important links in the process of geothermal energy ...
Jianjun Hu +5 more
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Carbonation Depth Model and Prediction of Hybrid Fiber Fly Ash Concrete
Advances in Civil Engineering, 2020 The concrete is weakly alkaline, the alkalinity of the concrete will be reduced after being carbonized, and the protective effect of the concrete on the steel bar will be weakened, even leading to corrosion of the steel bar.
Jing-shuang Zhang +2 more
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Grain-size composition predicting models after explosion in open-pit mining
Journal of Degraded and Mining Lands Management, 2019 One of the main technological tasks facing mining engineers today is a reduction of the oversized fraction output. Currently, the efforts of scientists are aimed atdeveloping reliable grain-size composition predicting models for the extracting rock mass,
A K Kirsanov +4 more
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Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023 Liquid nitrogen (LN2) fracturing is recognized as an innovative reservoir enhancement technique, demonstrating significant potential in establishing high permeability pathways in geothermal development. Understanding the physico-mechanical properties and
Zhouqian Wu +4 more
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The Hydrogeological Setting of Ghana and the Potential for Underground Dams [PDF]
, 2003 Increasing human population, changing lifestyles and environmental considerations have resulted in increased utilization of groundwater resources worldwide.
Dapaah-Siakwan, Stephen +3 more
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ANALYSIS OF SHAFT LINING STRESS STATE IN ANHYDRITE-ROCK SALT TRANSITION ZONE
Rudarsko-geološko-naftni Zbornik, 2022 The main question of this paper is the stress-strain state prediction of the vertical shaft’s combined lining located at the interface of two layers of dolomite and salt. The study predicts geomechanical processes at the contact of the dolomite layer and
Maxim A. Karasev +3 more
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Road foundation detailing using ground penetrating radar systems with different frequencies [PDF]
, 2017 This paper reports on the assessment of the underground construction details of a road pavement using different frequency ground penetrating radar (GPR) antenna systems.
Alani, Amir +3 more
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