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渠道改性土处理是用弱膨胀土添加水泥对渠道上膨胀土进行改性,使其自由膨胀率<20%。文章结合工程实际具体介绍了改性土的工作原理、方案设计、施工工艺流程、施工注意事项和质量控制措施等。南水北调中线一期工程膨胀土段实践表明,膨胀土改性在处理膨胀土中,既能保证工程质量,又能提高施工效率,是一种处理渠道膨胀土的有效工程措施。
Channel modified soil treatment is the use of weak expansive soil cement added to the expansive soil on the channel modified so that the free expansion rate of <20%. The article introduces the working principle, design of the modified soil, construction process flow, construction precautions and quality control measures in detail with the engineering practice. The expansive soil section of the first stage of the South-to-North Water Diversion Project shows that the expansive soil modification is effective in treating expansive soils, which can not only ensure the quality of the project but also improve the construction efficiency.