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砂质粉土渗透系数低,属中等透水性,存在渗漏问题。以北京市南水北调配套亦庄调节池(一期)工程为例,论述了如何通过水泥改性土回填施工技术,将一定比例的水泥掺入砂质粉土中,改变土的分子结构,形成一种分子颗粒间隙小、压实度高、抗渗性能强及满足调节池防渗要求的水泥改性土。
Sandy silt low permeability coefficient, is a moderate water permeability, the existence of leakage problems. Taking the project of Yizhuang Regulating Pond (Phase I) of South-to-North Water Diversion Project in Beijing as an example, this paper discusses how to mix a certain proportion of cement into sandy silt by means of cement-modified earth backfill construction, change the molecular structure of soil and form a Small molecular particle gap, high compaction, impermeability and meet the requirements of impermeable concrete tank modified soil.