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Full-Text Articles in Civil and Environmental Engineering
Lining–Stratum Interaction Mechanism Of Mountain Tunnel Based On Static Pushover Model Test, Qin-Wu Lu, Zhen-Chang Guan, Lin Lin, Shu-Jing Wu, De-Jie Song
Lining–Stratum Interaction Mechanism Of Mountain Tunnel Based On Static Pushover Model Test, Qin-Wu Lu, Zhen-Chang Guan, Lin Lin, Shu-Jing Wu, De-Jie Song
Rock and Soil Mechanics
With the rapid development of traffic infrastructure construction in western mountain area, the lining-stratum interaction mechanism of mountain tunnel under seismic effects has attracted increasing attentions. Based on the prototype of a regular two-lane highway tunnel section with V-grade surrounding rock, a static pushover model test for mountain tunnel was conducted. The variations of stratum displacement, stratum strain and ground pressure with pushover distance were carefully studied, and the lining-stratum interaction mechanism was thoroughly discussed. The test results show that: the lining-stratum interaction can be generally divided into compacting stage, overturning stage, and dragging stage. The stratum tends to circumferentially …
Propagation Process Of Hydraulic Fracture Crossing An Orthogonal Discontinuity, Lei Chen, Guang-Qing Zhang, Min Zhang, Yu-Jie Cao, Li-Ji Shen
Propagation Process Of Hydraulic Fracture Crossing An Orthogonal Discontinuity, Lei Chen, Guang-Qing Zhang, Min Zhang, Yu-Jie Cao, Li-Ji Shen
Rock and Soil Mechanics
Massive developed discontinuities are the salient geological features of unconventional oil and gas reservoirs, and the hydraulic fractures’ capabilities of crossing the discontinuities concern the stimulation effects of hydraulic fracturing. To study the development of the fracture process zone (FPZ) when the hydraulic fracture orthogonally propagates through a discontinuity, the self-designed visual fracturing equipment was adopted to carry out hydraulic fracturing tests on sandstone plates with a prefabricated unbounded friction interface. Based on the digital image correlation method, the displacement and strain characteristics during the hydraulic fracture propagation across the orthogonal interface were monitored in real time. The test results …