金沙江永善—水富段滑坡分布規(guī)律及其形成模式
[Abstract]:In order to evaluate the stability of bank slope of Xiangjiaba Reservoir (Yongshan-Shuifu) in Jinsha River after impoundment, and to provide reference materials for monitoring and early warning of geological hazards during reservoir operation, geological maps and topographic maps are used. Based on ortho aerial image and SPOT-5 commercial satellite image, the landslide database is established by using GIS platform, combined with field investigation before water storage and remote sensing interpretation method, and the spatial distribution and bank slope structure of landslide are analyzed by statistical method. Finally, four formation modes of landslide are summarized. The following results are obtained: (1) the landslide is mainly developed in the Jurassic strata below the new town, and the distribution of the landslide above the new town is controlled by the S0Ziba fault; (2) the number distribution density of slope (III 1) is the largest, and that of slope (V) is the smallest. (3) the landslide point density of Jurassic self-flow well formation (J2z) is the highest, and that of Permian Leping formation (P2l) is the highest. (4) the existing landslide formation models in the reservoir area can be summarized into four types: (1) the sloping slope of the outer rock mass (III 2), (2) the bedding sliding of the bank slope of the outer rock mass of the gently inclined slope (III 1), and (2) the bedding sliding of the bank slope (III 1) of the outer rock mass of the inclined slope. (3) Arc sliding of layered rock mass bank slope (IV 1) in gently inclined slope, (4) collapse slope product, alluvial loose layer sliding along the interface of volt foundation cover. During the impoundment period and operation period of Xiangjioba Reservoir, the bank slope below the new town, especially the gentle outward forward layered bank slope (III 1), should be monitored.
【作者單位】: 安徽理工大學(xué)土木建筑學(xué)院;四川大學(xué)水利水電學(xué)院水力學(xué)與山區(qū)河流開發(fā)保護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家自然科學(xué)基金國(guó)際合作項(xiàng)目(41661134012) 安徽理工大學(xué)博碩士基金(11678)
【分類號(hào)】:P642.22
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