关键词: 道路工程, 防灾工程, 解释结构模型法, 相互作用矩阵, 综合选线

Abstract: Large-scale disasters are often triggered by multiple causal factors, which interact in a complicated way. It is the key to reveal the mechanism of disasters and formulate prevention and control measures to clarify the causal relationship between factors and identify the formation ways of disasters. Taking the landslide occurred at the Badu railway station on Nanning-Kunming railway as an example, the causes of the primary and secondary landslides were illustrated by employing an accident tree firstly. Secondly, aiming at the situation of staggered influence and hierarchical chaos between the influencing factors of primary and secondary landslides, a dual-level hierarchical structure that reflected the primary causal factors of two-grade landslide system was drawn by an interpretative structure model method, which simplified and layered the complex relationship. Finally, in view of the interaction between factors and systems, the interaction matrix method was used to compare and select the route schemes based on the weakest interaction between engineering and environment, and the construction risk control based on disaster path analysis was studied. The results show that when the cause of disaster system is clear, the formation and development process of disaster can be well clarified by using accident tree method. When the relationship between factors in the system is confused and the logic is not clear, the interpretive structural model method can make it logically, hierarchically and systematically. When there is interaction in the system, the interaction matrix method has significant advantages in quantitative analysis of the internal action intensity and disaster path analysis.

Key words: highway engineering, disaster prevention and control engineering, interpretative structural model method, interaction matrix, integrated route selection