变径水泥土搅拌桩成桩质量的试验分析

变径水泥土搅拌桩是一种新型的地基处理形式,它针对传统水泥土搅拌桩存在的诸多弊端进行了相应的改进。本文采用标准贯入试验、水泥土芯样的无侧限抗压强度试验和电阻率试验分析了变径水泥土搅拌桩的成桩质量,结果表明：变径水泥土搅拌桩保证了桩体中的水泥掺入量,提高了水泥浆分布的均匀性,从而保证了桩身质量,特别是深部桩体的质量;电阻率能够较好地定量反映出桩体搅拌的均匀性,而且水泥土芯样的电阻率与无侧限抗压强度和标贯击数存在着很好的相关性,电阻率随强度的增大而增大。

Experimental analysis on the quality of soil-cement deep mixing piles with variable cross-section in soft subsoil treatment

The soil-cement deep mixing piles with variable cross-section are a new kind of method for soft soil treatment. Some special modifications have been made to the disadvantages which exist in the traditional deep mixing piles. The quality of the piles with variable cross-section is studied by means of SPT, unconfined compression strength testing and electrical resistivity testing. Through the testing data and theoretical analysis, the results show that the said piles are more homogeneous and have higher strength, especially in deeper layers. The electrical resistivity has a good relationship with the unconfined compression strength and the blow count of SPT. As the strength increases, the electrical resistivity also increases.