灰土井桩是一种柔性桩,在陕甘地区的多层建筑基础中已体现出较明显的有效性和经济性,其实用价值已得到证实,灰土井桩作为受力桩,其桩型一直采用大孔径的圆柱形.但实践证明这种桩形在灰土井桩基础中较为突出的问题是其承载力偏低、沉降值偏大.针对这一问题,本文提出了异形灰土井桩概念,介绍了柔性桩的现场静力测试方法,和二种异形桩与常规形灰土井桩承载性能的对比试验结果. The lime soil shaft pile is a kind of flexible pile, which has already manifested obvious effectiveness and economy in the multi-story building foundation in the Shaanxi-Gansu area. Its practical value has been confirmed. The lime soil shaft pile is used as a force-bearing pile, and its pile type has been The large-aperture cylindrical shape is used. However, it has been proved that the problem of this type of pile in the lime soil shaft pile foundation is that its bearing capacity is low and the settlement value is large. In response to this problem, this paper proposes a special-shaped lime soil shaft pile concept. This paper introduces the in-situ static test method of flexible piles and the comparison test results of bearing capacity of two kinds of special-shaped piles and conventional lime-soil piles.