摘要
重庆市南川区地处渝、黔两省(直辖市)交汇点,地形条件、地质环境较为复杂,公路地质灾害频发,研究公路地质灾害分布及影响因素对南川区公路的规划、建设与管养具有重要意义。依托第一次全国自然灾害综合风险普查开展公路承灾体调查,南川区国道、省道、县道、乡道共有地质灾害点374处,其中崩塌250处,滑坡58处,沉陷与塌陷66处,一级风险点1处,二级风险点19处。针对374处地质灾害点开展分析可知:崩塌灾害主要发生在坡度70˚以下,滑坡灾害主要发生在坡度60˚~80˚之间;沉陷塌陷灾害多受河流水系和降雨影响,崩塌灾害在研究区内较为发育,公路地质灾害主要受高程、坡度、降雨量、植被覆盖率等因素影响。
Nanchuan District, Chongqing City is located at the intersection of Chongqing and Guizhou provinces (municipalities directly under the central government), with complex terrain and geological environment. Highway geological disasters occur frequently, and studying the distribution and influencing factors of highway geological disasters is of great significance for the planning, construction, and management of highways in Nanchuan District. Based on the first national comprehensive risk survey of natural disasters, a survey of highway disaster-bearing areas was conducted. There are a total of 374 geological disaster points on national, provincial, county, and township roads in Nanchuan District, including 250 collapses, 58 landslides, 66 subsidence and collapse points, 1 first-level risk point, and 19 second-level risk points. Based on the analysis of 374 geological disaster points, it can be concluded that collapse disasters mainly occur at slopes below 70˚, while landslide disasters mainly occur at slopes between 60˚ and 80˚;subsidence and collapse disasters are mostly influenced by river systems and rainfall. Collapse disasters are relatively developed in the study area, and highway geological disasters are mainly affected by factors such as elevation, slope, rainfall, and vegetation coverage.
出处
《土木工程》
2023年第11期1321-1330,共10页
Hans Journal of Civil Engineering
