水泥土被广泛用于泥炭土等软基处理中，但泥炭土中含腐殖酸，导致水泥土工程性能劣化问题不容忽视，相关问题尚未深入研究。本项目拟以昆明、大理为代表的高原湖相泥炭土为研究对象，先通过取样分析其中腐殖酸的种类、含量（或浓度），确定试验环境；利用室内模拟试验，分析冲洪积黏性土在腐殖酸作用下，工程性状变化规律及细微观结构特征；采用均匀设计模拟泥炭土环境对水泥土的养护和服役阶段的腐蚀作用，通过短期、中长期内耗酸量和耗酸率评价腐殖酸的腐蚀效应；通过试样的物理力学指标变化揭示水泥土工程性质劣化规律，建立劣化模型；利用XRD测试水泥土劣化过程中的化学产物，利用SEM电镜扫描和CT扫描分析劣化过程中水泥土的细微观结构变化，探讨劣化机制；结合均匀试验，利用ACE非参数回归构建高效响应面，以期建立耐久性评价体系。研究将揭示水泥土在腐殖酸作用下的劣化机制，同时为水泥土复合地基在泥炭土地区应用的耐久性评价提供理论依据。

The cement-stabilized soil was widely used to improve peaty soil soft foundation in civil engineering. Some erosive humic acid, which lie in groundwater and soil of peaty, might affect mechanical property of cement-stabilized soil, but the relevant issues had not been studied intensively. The project prepares to focus on the plateau lacustrine peaty soil from Kunming and Dali cities. Firstly, the soil and water samples will be collected, tested and statistics to obtain the species and solubility of humic acid (pH)，which will be used as the experimental environment. Secondly, analysis the engineering properties and micro-structure characteristics of the alluvial-diluvial clay in the humic acid. Then, the experimental set ups would be developed to simulate the cement-stabilized soil be eroded in the humic acid in the curing and service stage, assess the corrosion effect by the acid consumption and acid consumption rate under short-term, medium-and-long-term. Thirdly, the deterioration law would be evaluated by superficial morphology of test specimen, the depth of erosion, compressive strength, elasticity modulus and index of physical mechanical properties in the humic acid soaking test, and the deterioration model would be established. Fourthly, the mechanism of deterioration would be analyzed, by utilizing XRD testing determined the new chemical produced in the soaking test, then use CT scan and SEM testing analyzed the changed law of cement-stabilized soil microstructure in erosion. Finally, the evaluation system, the high fitting precision of ACE nonparametric regression to build the efficient RS, would be established. The output of this project will increases mankind`s knowledge of the deterioration of cement-stabilized soil under peaty soil erosion environment, and provide theoretical basis for predicting the durability of cement-stabilized compound foundation in peaty soil region.