摘要
高速公路路堤填筑过程可近似地看为一个线性加载的过程。笔者从土体应力-应变关系出发,证明了在线性加载或近似线性加载情况下,路堤沉降-时间曲线呈反“S”型特征,并由此建立了 Gompertz 沉降-时间预测模型,其中 3 个参数 a、b 和 c 可以通过 SAS 程序求解得到。多个工程实例的应用证明了该模型在路堤沉降预测中的合理性和实用性。
The construction of embankment of highway can be regarded as a linear loading process, during which the soils are filled gradually on the ground. Based on the stress-strain relationship of the soil mass, the characteristics of settlement^time curve (s-t) of the ground under instant loading, linear or approximately linear loading are analyzed respectively. The results show that the s-t curve is inversely S-shaped. According to the behavior of s-t curve, the Gompertz model is established to predict the ground settlement. The three parameters in the model, a, b and c can be easily solved by SAS program. This model is used to study 4 cases. The comparisons illustrate that the settlement predicted by Gompertz model keeps good agreement with the measured data.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第1期82-86,共5页
Rock and Soil Mechanics
基金
教育部博士点基金项目(No.2001028618)
