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not only by the excavation overburden depth, but also by the forepoling reinforcement and tail void grouting measures. Key words: adjacent excavation; shield method; operational parameters; settlement... Zhichunlu station and Zhichunli station of Line 10, were excavated by shallow tunnelling method. The cross section of each of the twin tunnels shapes is the horseshoe shape. The overburden depth......
; accepted 18 September 2013 Abstract: Al-7.5Si-4Cu cast alloy melt modified by Al-5Ti-B, RE and Al-10Sr master alloys were poured in the chromite sand moulds, to investigate comparatively the effects... refiners and modifier are listed in Table 2. Degassing was done with argon supplied at a flow rate of 15 L/h for 20 min by porous plug method. Molten alloy was poured at 710 °C into the chromite sand moulds......
to acidic water generation and water pollution. Therefore, mine waste management is a significant task in mining operations. As known, in strip mining, the overburden is not transported to waste dumps... industry, the wastes can be classified into four groups [3]: 1) overburden of soil and/or rock that is extracted to access valuable material; 2) waste rock whose grade is below the cut-off grade (sub-grade......
increasing and the relationship of stress-strain is approximately linear. The influence of compactness and overburden pressure on transverse mechanical properties of geotextile bag with sand is significant......
;of the Kiaochow Bay Subsea Tunnel. Twenty experiments under different working conditions were operated in terms of influencing factors such as the water depth, the excavation area and the overburden......
, and the cohesion force decreases sharply; the internal friction angle decreases slightly, and the maximum drop occurs after 2 times of dry-wet cycles. The reduction of the overburden load makes......
, was taken as the engineering background. Due to the foundation pit excavation-induced disturbance, the subgrade parameters of the overburden soil layers, which resisted the heave of the underlying......
effect of overburden and self-gravity, blasting-disturbance and lateral pressure on cemented backfill pillars. And a theoretical model for the critical blasting vibration velocity of the pillar......
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