模糊评判法在公路黄土洞穴发育程度分区中的应用

Development Density Zoning of Highway Loess Caves by Fuzzy Evaluation Method

阐述了影响黄土洞穴形成的黄土湿陷性、崩解性、地质构造、节理裂隙、微地形地貌和水文及气候条件等工程地质特性和地质因素;在公路沿线地区,公路工程质量及人类活动也是黄土洞穴形成的影响因素。洞穴发育程度分区预测和评价极具复杂性、随机性和模糊性,为此,在对各影响因素分析的基础上,借助模糊综合评判法,对黄土区公路沿线洞穴发育程度分区进行了研究。与实际情况对比分析表明,预测评价结果合理可靠,可作为黄土区已建公路洞穴灾害的防治依据。

Loess cave developed in the loess plateau is a kind of unfavorable geo-hazard, and it has become the main reason causing damage to the highway in western loess region. The formation of loess caves is not only relevant to the engineering characteristics of loess itself such as collapsibility, disintegrative etc, but to many other geologic factors such as geological structure, joint fissure, microtopography, hydrographic and climatic condition. Moreover,engineering quantities and human activities along highways are the influencing factors in loess area. Therefore the evaluation of development density zoning of loess caves is complex, random and fuzzy. Based on the distinct analysis of all the influencing factors, this paper studies the problem by fuzzy evaluation method. It is found that the evaluation result is reasonable and reliable by comparing with practical situation, so it can be applied to the prevention of cave hazards in loess area.