沿河开发建筑场地之隐伏沙洞的电阻率层析成像

采用电阻率层析成像二维测量的方法,对河南省三门峡市沿河开发的建筑场地进行了勘探,获取了地下隐伏沙洞的准确位置、埋藏深度、含水情况、尺寸大小等。说明电阻率层析成像二维测量的方法在地下隐伏沙洞的探测中是行之有效的;地下隐伏沙洞在没有水体存在时,电阻率层析成像二维测量成果图中反映的一般都是高阻异常封闭圈。如果有水体存在,其异常则表现为低阻异常封闭圈。

Resistivity Tomography of Buried Cavities at the Construction Site Along River

The building site developed along the river in Sanmenxia city of province Henan; The construction site surveyed by 2D Resistivity Tomography method. The exact locations, buried depths, water-bearing states and size of the cavities were found out, which indicate that 2D Resistivity Tomography surrey is an effectual method in practice for probing the buried cavities. If there is no water in the cavity, the anomaly would appear as a closed circle with high impedance in the 2D resistivity image. In contrast, the anomaly would manifested as a closed circle with bow impedance if there is water in the cavity.