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时间:2020-03-25
《岩溶路基注浆质量综合物探检测方法与评价研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、JournalofEngineeringGeology工程地质学报1004-9665/2015/23(2)034408DOI:10.13544/j.cnki.jeg.2015.02.020岩溶路基注浆质量综合物探检测方法与评价研究①②①①①胡熠谢强李朝阳渠孟飞(①西南交通大学地球科学与环境工程学院成都610031)(②中国建筑西南勘察设计研究院有限公司成都610081)摘要为研究岩溶路基注浆质量综合物探检测方法及相关检测评价标准,在南广铁路全线的岩溶路基中选取具有代表性的试验区段,对电阻率法、瞬态面波法和电磁波
2、CT法等物探检测方法的特性和检测评判标准展开了现场试验研究。根据上述物探检测方法的适用性和经济性,提出了一种在不同工程条件下多种物探检测方法优化组合的综合物探检测方法。并通过统计分析注浆合格的岩溶路基注浆前后电阻率、面波波速及电磁波吸收系数变化规律,初步得出了上述3种检测方法的注浆质量检测评价标准:电阻率法检测合格标准为溶洞注浆前后电阻率变化率大于20%,卵石土层电阻率变化率大于10%;瞬态面波法检测合格标准为注浆后土体波速大于206h+1303,溶洞波速大于171h+2369;电磁波CT法检测合格标准为溶洞
3、-1-1注浆前后电磁波吸收系数差值大于04dB·m,卵石土层电磁波吸收系数差值大于01dB·m。关键词岩溶路基注浆物探综合检测评价标准中图分类号:P631文献标识码:ACOMPREHENSIVEGEOPHYSICALDETECTIONMETHODANDEVALUATIONOFKARSTROADBEDGROUTING①②①①①HUYiXIEQiangLIChaoyangQUMengfei(①FacultyofGeosciencesandEnvironmentalEngineering,SouthwestJiaot
4、ongUniversity,Chengdu610031)(②ChinaSouthwestGeotechnicalInvestigation&DesignInstituteCo.,Ltd.,Chengdu610081)AbstractThispaperstudiesthecomprehensivegeophysicaldetectionmethodandevaluationstandardofkarstroadbedgroutingeffect.ThetypicaltestareasofNanningGuangzho
5、urailwaykarstroadbedareselected.Thefieldtestresearchofdetectionstandardandcharacteristicsarestudiedusingresistivitymethod,transientsurfacewavemethodandelectromagneticwaveCTmethod.Theapplicabilityandeconomyoftheabovegeophysicaldetectionmethodsareevaluated.Thecom
6、prehensivegeophysicaldetectionmethodofvarietymethodscombinationindifferentengineeringconditionsisproposed.Thedifferentialvaluesofresistivity,surfacewavevelocityandelectromagneticwaveabsorptioncoefficientarestatisticallyanalyzedusingthetestdataofgrouting.Thegrou
7、tingisqualified,andpreliminarilyobtainedinthekarstroadbed.Thegroutingeffectdetectionstandardsareproposedfortheabovethreegeophysicalmethods.Theresistivitymethoddetectionstandardisthattheresistivitydifferentialvaluesofkarstcaveismorethan20%,andthepebblesoilismore
8、than10%.Thetransientsurfacewavemethoddetectionstandardisthatthewavevelocityofclayismorethan206h+1303,andthekarstcaveismorethan171h+2369.The收稿日期:2014-02-14;收到修改稿日期:2014-
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