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基于瞬变电磁法探测湿陷性黄土塌陷区———以常闫分离式立交桥为例

DOI: 10.3969/j.issn.1674-0696.2014.02.09, PP. 40-43

Keywords: 桥梁工程,湿陷性黄土,瞬变电磁法,空穴探测,bridgeengineering,collapsibleloess,transientelectromagneticmethod,cavitydetection

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Abstract:

:?针对豫西湿陷性黄土塌陷问题的特殊性,利用瞬变电磁法探讨了黄土区陷坑、裂隙以及含水塌陷体等非层状体系的电阻率响应特征;设计出根据土壤视电阻率ρ值即能直接动态查询相应含水量的程序,从而实现了土壤由电性信息向含水量信息的快速转换。结合工程实例,以10%界限含水量为场地塌陷的判别依据,提出了适合豫西黄土湿陷特点的物探解译方法和超前预报方法,并运用钻探工程验证了探测效果,为同类复杂工程提供了范例。

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