土的视电阻率的各向异性指数随裂隙深度开展的变化规律研究

Research on Change Rule of Soil Apparent Electrical Resistivity Anisotropy with Crack Depth Change

土中裂隙不论对环境、工程还是农业都有危害。目前的研究裂隙的方法有很多,但都有其缺陷,特别在裂隙深度上的研究没有一个经济无损可以广泛应用的方法。用单层电极模型来分析研究具有不同裂隙开展的土的视电阻率的各向异性指数(AI),掌握各向异性指数的变化规律;用有机玻璃板作为裂隙,通过四电极法做多层电极室内试验证上诉规律。得出单层电极测量裂隙深度对土体的AI的影响存在1倍电极距离的影响范围,AI变化率在裂隙相对深度接近于0点取到峰值,以此提出裂隙的深度的测试方法。

The soil crack is harm in environment,engineering and agriculture. At present,there are many method to study crack but has its defects,especially method in crack depth without economic,nondestructive and widely used. To master the variation of apparent electrical resistivity anisotropy index（ AI）,a single layer of electrode model to research AI with different crack development in soil is used. With organic glass plate as a crack,multilayer electrode indoor test to prove the appeal rule through four electrode method is used. As a result,a single layer of electrode have a influence scope of a distance of electrodes for measuring the crack depth on soil AI and AI change rate peak is at point close to 0 of the crack relative depth. And a method for measuring the soil crack depth according to the rule is proposed.