A5083618682- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Underground Structures
- Grouting, Rheology, and Soil Mechanics
- Electromagnetic wave absorption materials
- Rock Mechanics and Modeling
- Advanced Antenna and Metasurface Technologies
- Electromagnetic Compatibility and Measurements
- Landslides and related hazards
- Geophysical Methods and Applications
- Structural Engineering and Vibration Analysis
- Magnetic Properties of Alloys
- Advanced Energy Technologies and Civil Engineering Innovations
- Karst Systems and Hydrogeology
- Aluminum Alloys Composites Properties
- Structural Load-Bearing Analysis
- Tunneling and Rock Mechanics
Anhui University of Science and Technology
2022-2024
Beijing Jiaotong University
2008-2024
Spalling failure is a typical phenomenon after excavation and unloading of deep, hard brittle rock mass, which seriously threatens the safe construction deep roadways (tunnels) other projects. From engineering viewpoint, it essential to accurately evaluate range depth surrounding spalling failure. perspective laboratory site, strength formation mechanism were statistically summarized analyzed. Under uniaxial low confining pressure conditions, when load reached damage stress, cracks in...
In view of the problems rapid construction and deformation control large cross-section tunnels in complex urban environments, concept “timely high-strength support” was put forward to form strong support over time bear load surrounding rock real time, innovatively developed spatial reticulated grid bolt-shotcrete structure (SRGB). The research this paper focuses on supporting principle, bearing mechanical properties, snatch simulation test, process, engineering application effects....
Compared with single or twin tunnels, the pressure arch effect of deeply buried, symmetrically distributed triple tunnels are more complex and less studied. In this paper, arching responses in-situ measured in Badaling Great Wall station. Numerical research is subsequently conducted to investigate formation development tunnels. Then, influencing law buried depth on behavior systematically Based monitoring data, rock distribution asymmetric about axis response middle significant than that...
To solve the technical problems of slow construction progress, low mechanization and high risk shallow buried large cross-section tunnels in a complex urban environment, series spatial reticulated shell (SRS) support structures are developed this paper. Moreover, equipment multifunctional operation trolley is to install SRS arch, technology system prefabricated structure proposed for tunnel. Therefore, deformation characteristics end-plate joint component jointless clarified by laboratory...
Using RFPA software, the hydraulic pressure resistance and damage process of grouted stone body a tunnel in high-pressure karst zone were analyzed, composite surrounding rock structure when was expanded through cavern under effect coupling investigated. Then, new parallel heading expansion scheme for New Yuanliang Mountain Tunnel innovatively discussed, reliability results calculation model verified by field test. Lastly, guided project to adopt 5 m grouting range advanced secondary lining...
Under the circumstance of soft fractured surrounding rock with high geo-stress, support technology tunnel has become a major challenge. Traditional I-shaped steel and bar lattice girder, which cross-sections are often designed to be left-right symmetrical, may have insufficient strength stiffness. Based on concept symmetry, new spatial tubular grid (SSTG) arch is large In order clarify mechanical properties failure mechanism SSTG used as primary support, through laboratory numerical...
The electromagnetic wave (EM) absorption properties of various particle size have been investigated in a sheet-type absorber using the <TEX>$Fe_{73}Si_{16}B_{7}Nb_{3}Cu_{1}$</TEX> alloy powder. With decreasing average size, complex permeability (<TEX>${\mu}_{r}$</TEX>) and permittivity (<TEX>${\varepsilon}_{r}$</TEX>) increased matching frequency is shifted toward lower frequency. fabricated EM absorbers showed <TEX>$2{\sim}6$</TEX>, <TEX>$17{\sim}23$</TEX> for <TEX>$-325{\sim}+400$</TEX>...
The factors leading to the collapse of tunnel face are diverse, and there is an interaction relationship between multiple influencing at physical mechanical level. By analyzing coupling affecting instability working face, this paper deduces calculation method effect construction risk for a certain event based on conditional probability theory, makes reasonable assumptions monitoring data probability. Finally, it verified by model test. results show that have other or changing parameters...
Complex permeability and power absorption of electromagnetic wave absorber have been studied by varying the particle size soft‐magnetic powder thickness consolidated sheet. Relative increased proportional to in <100 MHz range. But, as frequency increased, relative sheet made smaller particles decreased slower than that larger particles. This is due increasing contribution eddy current loss with frequency.