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1、JournalofEngineeringGeology工程地质学报1004-9665/2006/14(06)208472053多种物探方法在湘潭城区活断层勘探中的应用①②①②②②杨荣丰张可能徐卓荣王齐仁刘新华③②②陈伟林肖拥军刘登(①中南大学长沙410083)(②湖南科技大学湘潭411201)(③湘潭市科技局湘潭411104)摘要杨梅洲—木鱼湖断裂位于湘潭城区,要查明其位置和性质,地球物理勘探干扰因素多,施工条件不好。调查中分别采用天然电场选频法、高密度电阻率法和地质雷达等方法进行勘探,并通过开挖等方式进行验证,3种物探方法各有特点:天然电场选频法仪器轻便、勘探线布置灵活,干扰因素较少
2、,工作效率高,特别是利用其动态信息确定断层平面位置准确;高密度电阻率法勘探结果比较直观,特别是对断层性质的确定形象,但勘探布极的工作量较大,受地形等因素影响较大,在城区很多地方无法正常开展工作;地质雷达勘探成果形象直观,但设备成本高,勘探受地形等因素影响大,勘探深度有限,一般对表层效果较好。关键词湘潭城区天然电场选频法高密度电阻率法地质雷达活断层+中图分类号:P631.32文献标识码:AEXPLORATIONOFFAULTZONEINURBANXIANGTANWITHSELF-POTENTIALFREQUENCY,HIGHDENSITYRESISTIVITYANDGEOLOG2ICAL
3、RADARMETHODS①②①②②②YANGRongfengZHANGKenengXUZhuorongWANQirenLIUXinhua③②②CHENWeilinXIAOYongjunLIUDeng(①CentralSouthUniversity,Changsha410083)(②HunanUniversityofScienceandTechnology,Xiangtan411201)(③XiangtanBureauofScienceandTechnology,Xiangtan411104)AbstractTheYangmeizhou-muyuhuFaultissituatedjust
4、theinnerurbanareaofXiangtanCity.Therearemanydisturbancefactorsinprocessofgeophysicalprospecting.Thesiteconditionisnotgoodtotheuseofasinglegeo2physicalmethod.Threemethodsofgeophysicalexplorationwereusedtoinvestigateandtoidentifythepositionandnatureofthefault.Theyaretheself-potentialfrequencymetho
5、d,thehighdensityresistivitymethod,andthegeo2logicalradar.Besides,theinterpretedresultsfromthegeophysicalmethodsareverifiedwithloggingofactualexca2vationsItisfoundthatthethreemethodshavedifferentcharacteristicsasfollows.Theself-potentialfrequencymethodhasthefeatures:lightequipment,explorationline
6、layoutflexibilityandlessinterferencefactor.Especially3收稿日期:2006-04-03;收到修改稿日期:2006-05-08.基金项目:湘潭市科技局计划项目,湖南省自然科学基金(02JJY2065)和湖南省教育厅基金(02C437)资助.第一作者简介:杨荣丰(1964-),男,博士生,主要从事地质专业的教学与科研工作.Email:yrf888@sohu.com848JournalofEngineeringGeology工程地质学报2006itisprecisetousethetime-dependentdatatodeterminef
7、aultplanelocation.Thehighdensityresistivitymethodhasthefeatures:itiseasyvisualobservationandcomparisonofthefaultzone;theexplorationworkloadisextreme2lylarge;thetopographyhasalargeeffect;testinginurabnareaisdifficult.Thegeolo
