微动技术在城区不良地质体勘察中的应用研究

The Application and Study of Microtremor Technology in the Urban Unfavorable Geologic Body Survey

研究目的:城区物探环境品质恶劣,地表、地物状态复杂,不同物性的干扰源众多,常规物探方法应用皆存在很大的局限性。在城区物探环境品质评价与对策分析的基础上,引入微动技术作为城区主要物探手段,以城市轨道交通不良地质体勘察为主要工程领域进行微动技术应用,评估、研究其适用性、准确性及可靠性,探寻一条适于城区物探环境的新的有效技术途径。研究结论:(1)通过对城区物探环境品质的综合评价和对策研究,探讨了城区物探面临的局限性和受制约性现状,表明城区物探具有方法创新的技术必要和应用需求;(2)将微动技术作为城区主要勘察手段,在城市轨道交通项目中成功探查并确定了多种不良地质体的地质特征及赋存状况;(3)微动技术在城区物探环境中表现出良好的场地适用性和成果准确性,能为轨道交通等城区工程的设计、施工、排险提供重要物探依据,并进一步消减地质隐患,具备推广应用的潜力。

Research purposes:The geophysical environment in urban areas is bad,the surface and ground objects conditions are complex,and of the interference sources of different physical properties are numerous.There are great limitations in the application of conventional geophysical methods.Based on the evaluation and countermeasure analysis of geophysical environmental quality in urban area,the microtremor technology is introduced as the main geophysical prospecting means in urban areas,and the application of microtremor technology is mainly carried out in the field of urban rail transit in unfavorable geological body survey.Its applicability,accuracy and reliability are evaluated and studied,to explore a new and effective technical approach suitable for urban geophysical exploration environment.Research conclusions:(1) Through the comprehensive evaluation and countermeasure research of the environmental quality of geophysical prospecting in urban areas,the limitations and constraints faced by geophysical prospecting in urban areas are discussed,which indicates that geophysical prospecting in urban areas has the technical necessity and application needs of innovative methods.(2) Taking microtremor technology as the main means of urban survey,the geological characteristics of various unfavorable geological bodies are successfully explored and determined in urban rail transit projects.(3) The microtremor technology shows good site applicability and accuracy in geophysical exploration environment of urban area,which can provide important geophysical basis for design ,construction and risk elimination of urban projects such as rail transit,and further reduce geological hazards,and has the potential for popularization and application.