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1 前言某输水工程为避开采空区从压煤区和无煤区通过,经线路优化后,渠线地势高,挖深大,深挖方渠段(挖深>30m)长约3.9km,最大挖深40.64m.在该区段渠道能通过的安全区宽度仅190～250m,按一般渠道设计标准,边坡稳定计算满足要求时,渠道永久占地宽达308m,且渠线穿密集居民区而过,由此引起移民、占地、迁安费用巨大。对土质高边坡采取技术、经济合理的支护设计,减少渠道开口宽度,使之既能满足通过煤矿采空区的安全宽度,又降低工程投资是边坡支护处理设计的目的。2 边坡地质概况边坡范围位于山前洪积倾斜平原上,地形呈缓坡状起伏,
1 Foreword A water conveyance project to avoid the goaf from the coal seam and coal area through the optimization of the line, the high drainage line, digging deep, deep dig square channel (dig deep> 30m) about 3.9 km and the maximum digging depth is 40.64m. The width of the safe zone through which the canal can pass is only 190-250m. According to the design criteria of normal channels, when the slope stability calculation meets the requirements, the canal covers a land area of 308m permanently, Densely populated residential areas, resulting in immigration, occupation, immigration costly. Adopting technically and economically reasonable support design for the soil high slope and reducing the width of the channel opening so as to satisfy the safety width of the goaf through the coal mine and reduce the project investment is the purpose of slope support treatment design. 2 Slope geological overview Slope range is located in the front alluvial slope plain, the terrain is gentle slope undulating,