本文着重介绍了某高层建筑群对桩基持力层的优化、施工工艺的选择及所取得的显著经济效益进行了分析。该工程桩长缩短7m～14m,并与以中等风化基岩作桩端持力层的条件进行对比,大大降低工程造价,施工难度降低,缩短施工工期,工程经济效益和社会效益显著,为以后类似的建筑物桩基持力层可选择的条件下,提供了一个成功的工程实例。 This article focuses on the analysis of the optimization of the bearing layer of the pile foundation, the choice of construction technology and the significant economic benefits achieved by a high-rise building group. The length of this project is shortened by 7m～14m, and compared with the condition of middle weathering bedrock as the bearing endurance layer, which greatly reduces the construction cost, reduces the construction difficulty, shortens the construction period, and the engineering economic and social benefits are significant. A successful engineering example is provided under the optional conditions of the building pile foundation bearing layer.