1975年开始,我们在保定市原第二建筑工程处基地、五一旅社和赛片厂等工程中,对灌注混凝土圆锥形桩、正方锥形桩和预制混凝土正方锥形桩、楔形桩以及作同条件对比的柱形桩进行了三批共22根单桩静载试验。在试验研究的基础上,于1976～1977年先后建成了三项锥形桩基础试点工程,经多年的使用和观测,情况良好。一、试验概况本试验目的在于得出不同类型桩的单桩承载力、单方承载力等对比数据,以及摸索桩模、机具、成桩方法等施工技术和可行性,为工程实践提供依据和必要条件。 Since 1975, we have been dealing with concrete-concrete conical piles, square-cone piles, and precast concrete square-cone piles, wedge-shaped piles, and similar structures in the former Second Construction Engineering Base of Baoding City, the Wuyi Hostel, and the studio. The column piles of the condition comparison carried out three batches of 22 single pile static loading tests. On the basis of experimental research, three pilot projects for tapered pile foundations were completed in 1976 to 1977. After years of use and observation, the situation was good. I. Test Overview The purpose of this test is to obtain comparative data for bearing capacity and unilateral bearing capacity of different types of piles, as well as the construction techniques and feasibility of groping piles, implements, and pile forming methods to provide basis and necessary for engineering practice. condition.