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膨胀土特性对渠道施工影响较大,易发生冲沟、滑坡等地质灾害。南水北调中线工程穿越膨胀土(岩)渠段较长,处理技术难度高,新卫二标设计多段采用膨胀土换填施工,换填施工过程顺利,为后续工程的施工起到了重要作用。文章对南水北调中线工程新卫二标第12设计段的换填施工作了介绍。
The characteristics of expansive soil have a great influence on the construction of the canal, and prone to the geological disasters such as gully and landslide. The mid-route of the South-to-North Water Diversion Project has a long drainage channel through the expansive soil (rock) with high difficulty in treatment technology. Expansion soil is used for multi-section construction in Xinwei’s bidding design. The replacement filling process is smooth and plays an important role in the subsequent construction. The article introduced the replacement of the 12th design section of Xinwei bidding of the midline of South-to-North Water Diversion Project.