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- W2986236466 abstract "Based on the background of the construction of the mining section at the southern end of Yangli Station of Fuzhou Metro Line 2 project, in order to study the ground surface vibration law during the blasting construction of tunnels in the upper soft and lower hard composite strata, the vibration velocity data were obtained through field tests, and the traditional and modified Sadowski formulas were used to fit and analyze the vibration velocity respectively, which were verified by numerical simulation. The results show that under the condition of composite stratum, the peak value of radial vibration velocity of blasting construction on the surface of cave-forming area is the largest, and the peak value of vertical vibration velocity on the surface of non-cave-forming area is the largest; the ground vibration of shallow-buried tunnel excavation area in composite stratum has void effect, and the larger the distance between the blasting centers, the more obvious the void effect; the fitting degree of traditional Sadowski formula is lower than that of modified Sadowski formula V=KQaRb ; because of the existence of soft-hard interface, the attenuation rate of vertical vibration velocity is the sharpest relative to the radial and tangential vibration velocities on the surface of composite shallow-buried tunnels. At the same time, the feasibility of numerical software to simulate such engineering blasting construction is verified." @default.
- W2986236466 created "2019-11-22" @default.
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- W2986236466 date "2019-11-09" @default.
- W2986236466 modified "2023-09-27" @default.
- W2986236466 title "Study on Surface Vibration Characteristics of Composite Shallow-buried Tunnel Blasting Construction" @default.
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- W2986236466 doi "https://doi.org/10.1088/1755-1315/330/2/022098" @default.
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