黄土地区悬臂支护结构变形对生态环境的影响因素分析研究

Influence Factors of Cantilever Support Structure Deformation on Ecological Environment in Loess Area

就湿陷性黄土地区雨水天气的水土流失防治,提出改善悬臂支护结构变形的方式制定水土流失防治体系。基于现场变形监测,对影响黄土地区悬臂支护结构变形的因素进行数值分析。分析发现,基坑悬臂支护结构的支撑情况、几何参数的变化对其变形规律有影响。当悬臂支护结构的入土深度超过临界深度,水平位移受其影响较小。对基坑外侧及坑内土体加固,可以改善悬臂支护结构的变形特性。使用先进加固技术,提高加固程度,对减小悬臂支护结构的水平位移有显著贡献。进行有针对性地部署防治措施,使雨水天气可能造成的水土流失得到有效控制。

Based on the prevention and control of water and soil loss in rainy days in collapsible loess area,this paper puts forward the way of improving the deformation of cantilever support structure to formulate the prevention and control system of water and soil loss.Based on the field deformation monitoring,the factors influencing the deformation of cantilever support structure in loess area are analyzed.It is found that the change of the supporting condition and geometric parameters of the cantilever support structure has an effect on its deformation law.When the depth of the cantilever support structure into the soil exceeds the critical depth,the horizontal displacement is less affected by it.The deformation characteristics of the cantilever support structure can be improved by strengthening the soil outside and inside the foundation pit.The use of advanced reinforcement technology,improve the degree of reinforcement,to reduce the horizontal displacement of cantilever support structure has a significant contribution.The prevention and control measures shall be arranged to effectively control the water and soil loss caused by rain weather.