基于GIS的黄土地区公路地基承载力评价系统

Bearing Capacity Evaluation System of Highway Foundation in Loess Area Based on GIS

通过对西北黄土地区地基承载力及其主要影响因素分布规律的研究,进行了黄土地区地基承载力的分区,确定了黄土地基处理的原则和选取方法。在此基础上,建立了基于G IS的黄土地区公路地基承载力评价系统。该系统利用G IS的数据分析和属性数据管理功能,在收集的大量实测载荷试验数据和相应物理力学指标的基础上,建立了各区域承载力统计回归关系式与样本点的动态数据连接库,实现了对黄土地区公路地基承载力的有效评价。同时,利用地基处理的分析软件,结合公路路基的设计情况,提出了对黄土地基的处理建议,为公路部门的地基承载力评价和黄土地基处理提供了决策依据。

Through the study on the distributing rules of foundation bearing capacity and the major contributory factor in northwest loess district, the subregion of foundation bearing capacity of loess district is carried on, the principle and method of loess foundation treatment determined. The evaluation system of loess highway foundation bearing capacity based on GIS is established. By using the function of data analysis and management of GIS, on the basis of collection plenty testing data of foundation bearing capacity and the corresponding physical and mechanical indexes, the dynamic data bank of the regression formula of foundation bearing capacity in every district is established, and the efficient evaluation of loess foundation bearing capacity realized. At the same time, by using the analysis software of foundation treatment and according to the design of subgrade, a suggestion of loess foundation treatment is put forward, which provides reference for highway department in evaluating foundation bearing capacity and treating foundation in loess regions.