Results 21 to 30 of about 2,759,873 (338)

Analysis on Characteristics of Surrounding Rocks of Roadway and Bearing Structure Based on Stress Regulation

Advances in Civil Engineering, 2021
To address the prominent status of great deformation and difficult maintenance of the roadway under high stresses, this study investigated the mechanical characteristics of surrounding rocks and bearing structural stability in a roadway under adjustment ...
Ruofei Zhang, Guangming Zhao, Xiangrui Meng, Jian Sun, Wensong Xu, Yingming Li, Zenghui Liu, Siming Kao   +7 more
doaj   +1 more source

Application of excavation compensation method for constructing shallowly-buried super-large span subway tunnel

Case Studies in Construction Materials, 2023
Stress loss at the excavation face, stemming from underground chamber excavation, is the primary culprit behind geotechnical accidents. Implementing timely stress compensation is vital to control potential instability or failure in the surrounding rock ...
Wenhui Bian, Jun Yang, Kexue Wang, Dongming Xu   +3 more
doaj   +1 more source

Numerical interpretation of the coupled hydromechanical behaviour of expansive clays in constant volume column tests [PDF]

, 2015
© The authors and ICE Publishing: All rights reserved, 2015.Experimental and numerical studies of the behaviour of expansive clays have been attracting increasing interest, due to their good sealing properties, which render them ideal to be used as ...
Mantikos, V, Potts, DM, Taborda, DMG, Tsiampousi, A   +3 more
core   +1 more source

Mechanical Behavior and Excavation Optimization of a Small Clear-Distance Tunnel in an Urban Super Large and Complex Underground Interchange Hub

Applied Sciences, 2022
Close excavation section spacing, the mutual influence and interpenetration of various processes, and the multiple disturbances of the middle rock pillar in a small clear-distance tunnel pose great difficulty to construction. This study adopted the small
Jianxiu Wang, Ansheng Cao, Zonghai Li, Zhao Wu, Lihua Lin, Xiaotian Liu, Huboqiang Li, Yuanwei Sun   +7 more
semanticscholar   +1 more source

Theoretical Investigations on the Influence of Artificially Altered Rock Mass Properties on Mechanical Excavation

Rock Mechanics and Rock Engineering, 2018
This study presents a theoretical analysis of the influence of the rock mass rating on the cutting performance of roadheaders. Existing performance prediction models are assessed for their suitability for forecasting the influence of pre-damaging the ...
P. Hartlieb, S. Bock
semanticscholar   +1 more source

An Enhanced Ubiquitous-Joint Model for a Rock Mass With Conjugate Joints and Its Application on Excavation Simulation of Large Underground Caverns

Frontiers in Earth Science, 2021
A conjugate jointed rock mass (CJRM) is a rock mass with two sets of intersecting joints formed from intact rock under shear. Its mechanical properties and excavation-induced hazards of large underground caverns are different from those of common rock ...
Xianlun Leng, Xianlun Leng, Chuan Wang, Chuan Wang, Qian Sheng, Qian Sheng, Jian Chen, Jian Chen, Hailun Li   +8 more
doaj   +1 more source

Safety Dynamic Monitoring and Rapid Warning Methods for Mechanical Shaft

Buildings
In the context of urban space constraints, subway and underground projects have become crucial strategies to alleviate urban congestion and enhance residents’ quality of life. However, pit engineering, a frequent accident area in geotechnical engineering,
Hui Wang, Xinlong Li, Weilong Wen, Gaoyu Liu, Jian Chen, Huawei Tong   +5 more
doaj   +1 more source

Laboratory-Scale Limestone Rock Linear Cutting Tests with a Conical Pick: Predicting Optimal Cutting Conditions from Tool Forces

Buildings
This study introduces a simplified method for predicting the optimal cutting conditions to maximize excavation efficiency based on tool forces. A laboratory-scale linear rock-cutting test was conducted using a conical pick on Finike limestone.
Han-eol Kim, Sung-pil Hwang, Wan-kyu Yoo, Woo-seok Kim, Chang-yong Kim, Han-kyu Yoo   +5 more
doaj   +1 more source

Mechanical and hydraulic properties of the excavation damaged zone (EDZ) in the Opalinus Clay of the Mont Terri Rock Laboratory, Switzerland

Solid Earth, 2021
. Construction of cavities in the subsurface is always accompanied by excavation damage. Especially in the context of deep geological nuclear waste disposal, the evolving excavation damaged zone (EDZ) in the near field of emplacement tunnels is of utmost
Sina Hale, Xavier Ries, D. Jaeggi, P. Blum   +3 more
semanticscholar   +1 more source

GIS-based approach for assessing the energy potential and the financial feasibility of run-off-river hydro-power in Alpine valleys [PDF]

, 2018
In the last decade, European attractive policies are favoring the construction of new run-off hydro-power plants. The realization cost of these plants is quite low in mountain areas thanks to small water discharges and high gross heads.
Balest, Jessica, Garegnani, Giulia, Sacchelli, Sandro, Zambelli, Pietro   +3 more
core   +1 more source