南水北调东线一期工程江苏省境内膨胀土特征及改良

Expansive Soil Characteristics and Improvement of South-to-north Water Diversion in Jiangsu Province

以南水北调东线一期江苏境内工程场地膨胀土为研究对象,通过试验数据收集、分析,得出沿线调水泵站地基原状土、堆弃土、压实填土物理性质、矿物组成和膨胀性特征;结合室内试验,模拟施工条件进行膨胀土改良"大型"试验研究,对比石灰和石灰+水泥为改良剂及不同掺入率时改良土膨胀性、力学强度、渗透性的变化规律,提出膨胀土改良应用建议,为南水北调东线二期江苏境内工程建设积累经验。

In this paper, taking expansive soil in a North Water Transfer Project in Jiangsu Province as the research object,through experimental data collection and analysis, the paper draws the physical properties, mineral composition and swelling characteristics of ground undisturbed soil, spoil heap and compacted fill along transfer pump stations. Combined laboratory tests, the authors simulate the construction of expansive soil conditions of improved ＂large＂ experimental research, compare lime （lime and cement） when the modifier and different rates of incorporation of improved soil expansion, mechanical strength, permeability changes law, put forward suggestions of improved application of expansive soil, accumulate experience for the second phase of North Water Transfer project in Jiangsu Province.