Results 181 to 190 of about 7,659,823 (254)

Principles of engineering geology

This text is directed at the heart of Engineering Geology where geology is used to identify potential problems arising from ground conditions. It describes how to investigate those conditions and to define an engineering response that will either avoid ...
Attewell, P. B.
core  

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Ground-based radar unveils natural electron Bernstein waves in the ionosphere of Earth. [PDF]

Nat Commun
Wang Y, Yue X, Wu Y, Cai Y, Ding F, Vierinen J, Häggström I, Kudeki E, Zhang N, Wang J, Li M, Ning B, Jin L, Wang C.   +13 more
europepmc   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

Groundwater Hydrochemical Evolution and Contaminant Transport Within Lacustrine Estuarine Aquifers: Implications for Potable Water Security and Terminal Lake Ecological Preservation. [PDF]

Water Environ Res
Guo X, Xiao Y, Liu J, Wang J, Peng H, Wei J, Yuan Y, Wang W, Ren Q, Zhan P, Chen W.   +10 more
europepmc   +1 more source

Fluid‐induced slip on a rate‐and‐state fault during co‐ and post‐injection: The interplay of fluid pressure diffusion and poroelastic stress

Deep Underground Science and Engineering, EarlyView.
Fault slip can occur ahead of the injection pressure front due to poroelastic stress. Our model captures the interaction of pressure, stress, and friction, providing new insights into injection‐induced seismicity and post‐injection fault slip. Shut‐in operations can either mitigate or accelerate seismic events depending on fault conditions and ...
Qifeng Xie, Lei Wang, Qi Li
wiley   +1 more source

Compound effects of dams and levees reshape Yangtze flood dynamics and reveal substantial risk misestimations from ignoring levees. [PDF]

Sci Rep
Xu S, Sun H, Zhang L, Han J, Pan R, Yang L, Xiang X, Tang L.   +7 more
europepmc   +1 more source

Uniaxial compressive strength prediction and ratio parameter optimization of titanium tailings composite backfill materials using intelligent hybrid models

Deep Underground Science and Engineering, EarlyView.
Based on the 90 datasets, ERT and four optimization algorithms were used to build four hybrid models to predict the UCS of the backfill body. The SMA‐ERT model was the most effective model, and it can reliably guide the design of the backfill ratio parameters. Abstract This study analyzed the feasibility of using titanium (Ti) tailings as a backfilling
Weijun Liu, Zida Liu, Zhixiang Liu
wiley   +1 more source

Investigation of gold mineralization along the Al Amar Fault Zone using integrated geophysical and remote sensing methods in the Saudi Arabian Shield. [PDF]

Sci Rep
Abd El-Wahed MA, Attia M, Kassem OMK, Saad WM, Othman A, Saada SA, Eldosouky AM.   +6 more
europepmc   +1 more source

Numerical simulation study on the characteristics and propagation attenuation of vibration signals in freezing pipe fracture

Deep Underground Science and Engineering, EarlyView.
This research study employs analysis system (ANSYS) fluid–structure interaction simulations to investigate the generation and attenuation of vibration signals resulting from freezing pipe fractures in artificial ground freezing projects. By evaluating key variables—including frozen soil elastic modulus, brine inlet pressure, and external pipe pressure ...
Yi Cao, Yansen Wang, En Chen, Meng Zhao
wiley   +1 more source