江阴市崩塌地质灾害分布发育特征与破坏模式

Distribution Characteristics and Failure Modes of Rockfall Geological Hazards in Jiangyin City

摘要: 江阴市经济发达，人口密度大，随着经济的高速发展，出现了一系列地质灾害问题，在一定程度上制约了城市建设和经济社会的持续发展。本文以江阴市崩塌灾害为研究对象，结合实地调查，从区域分布、规模、形态、地层岩性、成因等方面，分析了区内崩塌灾害的分布发育特征，总结了崩塌灾害的破坏模式。结果表明：研究区崩塌主要分布于秦望山、花山等孤山残丘，由自然与人为因素共同作用形成。崩塌规模均为小型，危岩体距坡脚高差多小于100 m，以50~100 m最为集中，且集中于砂岩等坚硬岩组地层。所有崩塌隐患点均受人工开挖影响，主要分布在采矿区、山间道路及居民区周边。按破坏形式可分为滑移式、倾倒式和坠落式，其中坠落式和滑移式为主，倾倒式较少。

Abstract: Jiangyin City, characterized by its developed economy and high population density, has faced a series of geological hazards during rapid economic growth, which have constrained urban construction and sustainable socio-economic development. This study focuses on collapse disasters in Jiangyin City, combining field investigations to analyze the distribution and developmental characteristics of these disasters from perspectives of regional distribution, scale, morphology, lithology, and causes. The results indicate that collapse disasters in the study area are primarily distributed across isolated hills and residual hills, such as Qinwang Mountain and Huashan, formed by combined natural and anthropogenic factors. The scale of collapses is small, with the height difference between hazardous rock masses and slope foot mostly less than 100 meters, concentrated within 50~100 meters, and predominantly occurring in hard rock group strata like sandstone. All collapse hazard sites are affected by human excavation activities, mainly located near mining areas, mountain roads, and residential areas. The failure modes can be categorized into sliding, toppling, and falling types, with falling and sliding being predominant and toppling less common.