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蠕变沉降是高填方工后沉降的重要组成部分,对工程实际有较大的影响,研究高填方的工后蠕变沉降具有重要意义。试验表明:土的蠕变变形主要受时间和应力历史等因素影响。基于考虑时间效应的统一硬化模型,以瞬时正常压缩线为参考线,建立的可以同时考虑时间和应力历史影响的高填方一维蠕变沉降计算方法已经经过室内试验的验证。针对该一维蠕变沉降计算方法,描述参数的具体确定方法,进行完整详细的例题计算。
Creep settlement is an important part of post-construction settlement, which has a great impact on engineering practice. It is of great significance to study the post-construction creep settlement of high-fill. The experiment shows that creep deformation of soil is mainly influenced by time and stress history. Based on the unified hardening model considering the time effect and the instantaneous normal compression line as the reference line, the established one-dimensional high-fill creep settlement calculation method that can simultaneously consider the influence of time and stress history has been verified by laboratory tests. Aiming at the calculation method of one-dimensional creep settlement, the concrete method of describing the parameters is described and a complete and detailed example is calculated.