红层地区挖填场地地下水影响评价及分类体系的建立

Establishment of Groundwater Impact Assessment and Classification System for Excavation and Filling Sites in red beds area

四川省红层丘陵地区修建工业场地多会进行挖山填沟的场平工程,排水沟道回填后,形成非(半)固结土场地并局部抬高地下水排泄基准面,并产生各种工程地质问题。该文通过自然地理信息、地形地貌信息、地质信息和水文地质信息四个方面选择9个影响因子,采用层次分析法进行影响因子权重计算,并对评价因子进行分类赋值。在此基础上,采用综合指数法对红层地区挖填场地对地下水的影响进行定量评价,最终建立了四川省红层地区挖填方场地分类体系。

In the red beds area of Sichuan Province,the construction of industrial sites will often carry out the field leveling project of digging mountains and filling trenches.After backfilling the drainage channel,the non-(semi-)consolidated soil site is formed and the groundwater discharge base level is raised locally,and various engineering geological problems are generated.This paper selects 9 impact factors from four aspects of natural geographic information,topographic and geomorphic information,geological information and hydrogeological information,using analytic hierarchy process to calculate the weight of impact factors,and classifies the evaluation factors.The comprehensive index method is used to quantitatively evaluate the influence of excavation and filling sites on groundwater,and finally the classification system of excavation and filling sites in the red beds area of Sichuan Province is established.