电阻率测试技术在水泥土深层搅拌法工程中的应用研究

Research on application of electrical resistivity method to cement deep mixing pile engineering

通过水泥土电阻率试验研究分析,可知水泥土电阻率与无侧限抗压强度、水泥掺入比、龄期成正相关,即随着无侧限抗压强度、水泥掺入比、龄期的增大而增大;水泥土电阻率与含水量负相关,即随着含水量增大而降低;影响水泥土电阻率的主要因素依次为含盐量、水泥掺入比、天然含水量、粉煤灰含量、石灰含量。进行了水泥土电阻率和喷粉搅拌桩桩身抗压强度、芯样力学性状和标贯击数的对比研究以及野外电测井、电测深剖面勘探,探索了电阻率测试技术在水泥土深层搅拌法工程中的应用。

The main electrical resistivity properties of the cement soil are given by laboratory and field tests. Research shows that the cement soil with higher unconfined compression strength, higher cement content, longer time and lower water content, has higher electrical resistivity. In addition, The orthogonality test results indicate that factors influencing on the electrical resistivity of the cement soil are salt content, cement content, water content, flyash content, lime content in succession. By comparing field electrical resistivity test with standard penetration test, pile boiling observatin, it can be concluded that the electrical resistivity test is available for checking engineering quality of the cement deep mixing pile.