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本文依据工程需要，采取淮河大堤老应段的原状和扰动土样，在室内对堤体及堤基土的剪切蠕变和拉伸蠕变特性进行了试验研究。粘土的蠕变剪切强度远低于瞬时剪切强度，Ｃ∞值仅是Ｃ值的４０％左右；相同含水条件下粘土的长时抗拉强度大于瞬时抗拉强度，长时拉伸应变量远大于瞬时拉伸应变量，约为２倍。运用土体的长期强度指标计算堤体受煤矿开采沉陷影响可能产生的拉张裂缝最大发育深度，并运用拉伸变量值作为控制指标，使用线式应变观测系统对堤体开裂破坏进行预测预报，以指导堤防安全工作
Based on the engineering requirements, this paper takes the original and disturbed soil samples from the old section of the Huaihe River embankment, and studies the shear creep and tensile creep properties of the dike and embankment soils indoors. The creep shear strength of clay is much lower than the instantaneous shear strength, and the C∞ value is only about 40% of the C value. The long-term tensile strength of clay under the same water content is greater than the instantaneous tensile strength, Much greater than the instantaneous tensile strain, about 2 times. Based on the long-term strength index of the soil, the maximum depth of tension cracks that may be generated by the coal mining subsidence is calculated and the tensile strain value is used as the control index. The line strain observation system is used to predict and predict the cracking of the bank, To guide the dike safety work