中文摘要：

随着全球气候变暖、城市化进程加快，世界各地大城市的“热岛”效应及其带来的各种环境和生态问题越来越严重。本文从地质环境保护的角度，分析了城市“热岛”效应的成因、特点及其对地质环境的影响，重点讨论了城市“热岛”效应环境中土体工程性质的变化及其带来的各种灾害效应，在此基础上，凝练出了4个关键科学问题，即城市“热岛”效应环境中土体温度场变化规律、土体中水分迁移规律、土体工程性质变化规律以及土体地质灾害效应，并对它们的具体研究内容进行了详细的分析。论文的分析成果对于掌握城市“热岛”效应对土体工程性质的影响，保护城市地质环境和防灾减灾，实现城市的可持续发展具有重要的理论和现实意义。

英文摘要：

The heat island effect of major cities around the world and the associated environmental and ecological problems have become more and more serious with the global warming and the speedup of urbanization process. In the view of geological and environmental protection, this paper analyzes the causes and characteristics of urban heat island effect and its impact on the geological environment. I In particular, this paper focuses on the variation of soil engineering properties that arise from the effect and corresponding disaster effect. Furthermore, this paper presents four key scientific issues： i.e. , soil temperature changes , moisture migration laws in the soil, the variation of soil engineering properties and the geological disaster effect in the urban heat island. The paper also analyzes their detailed research contents. This paper points out the great theoretical and practical significance for understanding urban heat island effect on soil engineering properties, urban geological disaster prevention and reduction, and the urban sustainable development.