荷载作用下河道淤泥气泡混合土承载性状研究

Study on load bearing properties of channel silt bubble composite soil under load

河道淤泥气泡混合土是一种主要组分为河道淤泥的人工轻质土,荷载作用下的承载性能是河道淤泥气泡混合土工程设计的重要依据。主要利用模型试验、理论分析方法对混合土在荷载作用下的承载性能进行了研究。结果表明,河道淤泥气泡混合土作为地基在受荷破坏时呈局部剪切破坏,地基破坏范围随着气泡掺入量的增加而增大;地基承载力随气泡掺入量的增加而降低。基于载荷试验及地基承载力理论,建立了河道淤泥气泡混合土地基承载力设计计算公式,可为河道淤泥气泡混合土的工程应用提供设计依据。

The composite silt bubble soil in river ways is a type of artificial light soil mainly composed of the fiver silt, and the beating capacity under load is an important basis for the engineering design of the composite silt bubble soil in river ways. In this paper, the model test and theoretical analysis are adopted to study the beating capacity of the composite soil under load. The results show that the local shear failure happens when the silt bubble composite soil is used as the foundation material under the damage of load, the damage range of the foundation increases with the increase of the amount of air bubbles, while the beating capacity of the composite soil decreases with the increase of the amount of air bubbles. The calculating formula of the design of bearing capacity of channel silt bubble composite soil is proposed according to the load test and the foundation bearing capacity theory, which can provide basis for the engineering application of the composite silt bubble soil in the river ways.