摘要
因变更了初期坝轴线，Ⅲ号冲沟斜坡在清基中发现了隐蔽发育于中厚层白云岩中的卸荷裂隙，裂隙宽度０．１０～１．００ｍ，深度３．２０～４．５０ｍ。根据勘探及试验资料，进行了斜坡稳定性和渗透性评价。结论得出：（１）在天然状态下，Ｋ＞１，斜坡稳定；（２）在饱水状态下，沿ｍ２滑移结构面，Ｋ＜１，斜坡不稳定；（３）斜坡浅层管道式渗透作用，将产生渗透破坏。建议采用团结——帷幕溉浆作防渗处理。
Bcause the prellmlnarydam axis is varied,concealed relaxed crack is found on the slope by gully No.3 duringexcavation. The crack develops in the mid -thick bedded dolomite,with a width of 0.10 1.00m and a depth of 3.20～4.50m.According to the data gained from exploration and tests,an evaluation of the stabilityand leakage of the slope is made.The writers come to the following conclusions:1)K>1,the slope is stable in natural state;2)K<1,the slope is un stable in saturated state along m2 plane of sliding;3)failure may take place on the slope due to leaking under the conduit seepage in the shallow zone of rock mass.The writers make a suggestion that the consolidation-grouting be used as the im pervlous treatment.
关键词
防渗处理
尾矿库
堆石坝
斜坡
稳定性
concealed rdaxed crack
m_2plane of sliding
failure by leaking
sliding in the shallow zone of rock mass
impervious treatment the slope by gully No.3
prseliminary dam
tailings reservior
Guizhou Baiyan
