软基上大型砂袋围堤中袋体的作用

Function of bag body in large sand bag embankment on soft foundation

大型砂袋围堤作为软土地基上围堤修建的新技术,提高了围堤的凝聚力和整体性,能较好地适应软土地基的变形。受袋体作用的影响,大型砂袋围堤的整体力学和工程特性发生了较大的改变。合理确定砂袋的力学、工程特性,判断其对围堤整体稳定性的影响是模拟砂袋围堤、设计计算特征参数的依据。分析大型砂袋围堤中袋体作用的研究现状,总结模型试验、数值分析和理论推导3方面的研究成果和进展,对工程应用和未来研究的发展方向提出了针对性建议。

The large sand bag embankment,as a new technology for the construction of the embankment on soft soil foundation,has improved the cohesive force and integrity of the embankment and can better adapt to the deformation of the soft soil foundation.The whole mechanics and engineering characteristics of the large sand bag embankment have been changed greatly under the action of bag body.It is the basis of embankment simulation and design calculation to reasonably determine the mechanical and engineering characteristics of the sand bag and determine its influence on the overall stability of the embankment.This paper analyzes the research status of the function of bag body in large sand bag embankment,and summarizes the research results and progress of three aspects of model test,numerical analysis and theoretical deduction.At last,the pertinence suggestion is put forward to the engineering application and the future research direction.