针对未打穿情况的砂井地基 ,提出了砂井区三维固结向单层土层的一维固结等效时 ,等效土层厚度应由井距来控制这一思想。并基于此 ,改进了半排水法和双层地基法在砂井 (未打穿砂井 )固结理论中的应用。所得结果与有限元分析进行了对比 ,在分析深厚下卧软土层的固结特性和沉降规律方面 ,得到了一些有用的结论以供设计参考 ,指导实际工程。 Aiming at the sand foundation which is not penetrated, the idea that the equivalent soil layer thickness should be controlled by the well spacing is proposed when the one-dimensional consolidation of the three-dimensional consolidation to the single-layer soil layer in the sand well area is equivalent. Based on this, the application of the semi-drainage method and the double-layered ground method in the consolidation theory of sand wells (without penetrating sand wells) is improved. The obtained results are compared with those of the finite element analysis. Some useful conclusions are obtained in the analysis of the consolidation characteristics and settlement law of deep soft soil layer for design reference and guidance of actual engineering.