四极电阻率垂向测深法在评价土对钢结构腐蚀性中的应用分析

Application of Quadrupole Resistivity Vertical Sounding Method in Evaluating Soil Corrosiveness to Steel Structures

针对现行《岩土工程勘察规范(2009版):GB 50021-2001》未明确土对钢结构的腐蚀性评价指标中土壤视电阻率的具体测定方法,介绍了四极电阻率垂向测深法测定土壤视电阻率的原理,然后根据在珠三角地区两个地埋钢管工程中的实际应用情况,对案例的实测数据进行了比较和分析总结。实践表明,四极电阻率垂向测深法所测得的土壤视电阻率数据是基本可靠的,其在土对钢结构的腐蚀性评价中具有较高的应用价值,建议可作为土对钢结构腐蚀性评价指标中土壤视电阻率测定的主要方法。

In view of the concrete measurement method of soil apparent resistivity in the evaluation index of soil corrosiveness to steel structure which is not specified in the current Geotechnical Engineering Survey Code(2009 Edition):GB 50021-2001,the principle of measuring soil apparent resistivity by quadrupole resistivity vertical sounding method is introduced.Then,according to the two buried steel pipe projects in the Pearl River Delta region,the principle of measuring soil apparent resistivity by quadrupole resistivity vertical sounding method in the practical application,the measured data of the case are compared and analyzed.Practice shows that the apparent resistivity of soil measured by quadrupole resistivity vertical sounding method is basically reliable,and it has high application value in the evaluation of soil corrosion to steel structure.It is suggested that the method can be used as the main method for the determination of apparent resistivity of soil in the evaluation index of soil corrosion to steel structure.