解析法在黄土浸没湿陷影响高程中的应用

Application of Analytic Method in Influencing Elevation Prediction of Submerged and Collapsed Loess

为讨论水库浸没对建筑物的影响高程,以小浪底水利枢纽库区垣曲段为背景,将解析法应用于库区黄土浸没湿陷影响分析问题中,建立了适应于库区浸没湿陷影响高程的预测模型。选择建筑物基础埋深、变形计算深度、毛细水上升高度、地下水雍高、水库正常高水位运行高程、总湿陷量为5cm时的湿陷性黄土厚度等6个主要影响因子,通过现场调查、试验和长期观测等多种方法确定各因子数值,最终采用解析法确定库区建筑物黄土浸没湿陷影响临界高程,为科学确定水库黄土浸没湿陷的影响范围提供依据。

In order to study the influencing elevation of reservoir immersion on buildings, the Yuanqu section of Xiaolangdi Reservoir area is taken as the object, and the analytic method is applied to analyze the impact of loess immersion and collapsibility in reservoir area. A prediction model for the influencing elevation of loess immersion and collapsibility in reservoir area is established. Six major influencing factors of the depth of building foundation, the deformation calculation depth, the elevation of capillary water, the height of groundwater, the normal high water level operating elevation of reservoir, and the collapsed loess thickness when total collapsibility is 5 cm are selected, and the values of these factors are determined by means of field investigation, scientific experiment and long-term observation respectively. Finally, the critical influencing elevation of submerged and collapsed loess on the buildings in affected area of Xiaolangdi Reservoir is determined by analytic method,which provides a basis for scientifically determining the influence range of reservoir loess immersion and collapsibility.