摘要
软土地区开挖基坑具有较大的流变性。本文利用软土室内三轴蠕变试验,拟合了kelvin元件粘弹性模型。并将粘弹性元件模型应用到近邻地铁的深基坑开挖流变效应分析中,具体分析比较了基坑整体开挖和分区开挖对基坑支护结构和隧道的影响。结果表明,基坑分区开挖可有效减小支护结构的变形和隧道的隆起。
The excavation in soft soil brought out great rheology effect.Kelvin model was used and fitted based on indoor creep triaxial test.The excavation near metro tunnel in soft soil was simulated and analyzed with Kelvin model by using finite element method.The rheology in the excavation divided into several parts or one part was compared.The results showed that the excavation divided into one part reduced less deformation of the bracing structure and the tunnel under the foundation pit.
出处
《价值工程》
2011年第16期90-91,共2页
Value Engineering
关键词
流变
软土
元件模型
粘弹性
rheology
foundation pit
kelvin model
