滑坡和巖質(zhì)邊坡的變形外文翻譯(存儲(chǔ)版)
【正文】 e and finegrained particles. In a slop in which the rock is jointed but where there are no significant discontinuities dipping out of the slope which could cause sliding. In an extreme case,where the rock mass consists of near vertical joints separating columns of massive rock,toppling movement and failure may occur. For example aWahleach project is located 120 km east of Vancouver and power is generated from 620m of head between Wahleach Lake and a surface powerhouseb located to the Fraser flows through a 3500m long three meter diameter concrete encased steel lined shaft inclined at 48 to the horizontal, a 300m long lower tunnel and a 485m long surface penstock to the powerhouse. The tunnels were excavated mainly in granodiorite which varies from highly fractured and moderately weathered in the upper portions of the slope to moderately fractured and fresh in both the lower portions of the slope and below the highly fractured mass. Two main joint sets occur in the rock mass,one set striking parallel to the slope and other perpendicular to dip very steeply .Average joint spacings range from to few joints occur subparallel to the ground surface and these joints are most welldeveloped in the ground surface adjacent to the inclined investigations failed to reveal any significant shear zones or faults oriented in a direction conducive to sliding. The top of the slope is buried beneath colluvial and fan deposits from two creeks which have incised the Fraser Valley slope to from the prominence in which the inclined shaft was prominence is crossed by several linear troughs which trend along the ground surface contours and are evidence of previous downslope movement of the trees growing in these
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