浅剖仪在水域活断层调查中的应用研究

本文利用引进的ChirpⅢ声学剖面系统以及Boomer轰鸣器单道地震系统在不同水域环境下进行了活断层调查研究。通过分别在江河、湖泊以及海域等环境下进行测试,都获得了较好的地层剖面记录,并据此对调查水域的活断层存在情况进行了判断。通过对不同条件下的测试结果进行对比,认为本套探测适合用于查明晚第四系（从数十米到上百米）沉积结构,判断晚第四纪断层存在及其活动性,是了解工程区潜在地质灾害因素的重要途径。另外,本套系统的探测效果与水深以及地层土层性质有较大的关系,在具有一定水深（4m以上）、土层以粘土、粉土居多的地层条件下探测效果较好。

APPLICATION OF ACOUSTIC PROFILING SYSTEM ON ACTIVE FAULT INVESTIGATION IN WATER AREAS

The active fault investigations have been done in the different water areas with the acoustic profiling system,which consists of Chirp Ⅲ acoustic profiling system and Boomer acoustic profiling system.The strata profiles are adopted to make analyses on the existence of active fault in the investigation water areas,such as river,lake and sea.According to the comparison of the results obtained from the different investigations,it shows that this acoustic profiling system is useful to explore the sedimentary texture and faults activity of Late Quaternary System,and to investigate the potential geologic hazards.Furthermore,the effectiveness of the acoustic profiling system is related to the water depth and properties of soils,and it’ s more effective to apply in the clay and silt soil areas with the water depth more than 4m.