Results 91 to 100 of about 48,270 (261)
AHP-FSE-Based Risk Assessment and Mitigation for Slurry Balancing Shield Tunnel Construction. [PDF]
J Environ Public Health, 2022 Li K +6 more
europepmc +1 more source
Dipolar Molecular Motor Candidates with Planar Chirality
Chemistry – A European Journal, EarlyView.Two prototypes of molecular motors with simultaneous implementation of planar chirality and a permanent dipole have been designed and synthesized in 7 steps with overall yields of 2.8 to 5.5%. Abstract Two molecular motor candidates built around ruthenium(II) centers featuring both planar chirality and a permanent dipole have been synthesized in seven ...
Thomas A. Hector +5 more
wiley +1 more source
Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure. [PDF]
Sensors (Basel), 2021 Kou L, Xiong Z, Cui H, Zhao J.
europepmc +1 more source
Deep Underground Science and Engineering, EarlyView.Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang +4 more
wiley +1 more source
Mechanical behavior of sealed waterproof for shield tunnel segment joint under different assembling ellipticity. [PDF]
Sci Prog, 2021 Junwei Z, Sicen G, Yunyao C.
europepmc +1 more source
Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface
Deep Underground Science and Engineering, EarlyView.Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen +6 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao +5 more
wiley +1 more source
Measurement of vortex flow fields [PDF]
A 3-D laser fluorescence anemometer (LFA) was designed, built, and demonstrated for use in the Langley 16 x 24 inch Water Tunnel. Innovative optical design flexibility combined with compact and portable data acquisition and control systems were ...
Ambur, Todd A. +3 more
core +1 more source
Deep Underground Science and Engineering, EarlyView.A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen +5 more
wiley +1 more source
Detailed pressure distribution on a blunted 60-deg half-angle cone at Mach numbers of 6.08 and 9.46 [PDF]
Pressure distribution of spherically-blunted 60 deg half-angle cone in hypersonic ...
Kurtz, D. W.
core +1 more source