深层混合加固法在地基处理中占有很重要地位,但遇有深层加固空掘部分,则存在有多种非效率因素,空掘部分越深,其非效率因素越明显,同时越不经济,为此,作为一种既能减少空掘部分,又能提高质量和工效的扩缩法,即扩缩列柱法,经试研究已切实具有实用化条件。本文是有关扩缩列柱法的概要及其试验实施的一项报告。 Deep mixing and reinforcement method plays a very important role in the foundation treatment, but in the case of deep reinforcement of the empty digging part, there are many non-efficiency factors. The deeper digging part is, the more obvious the inefficiency factor is, and the less economical is As a kind of contracting method which can reduce the space digging and improve the quality and work efficiency, that is, the contracting column method, the experimental study has practically had practical conditions. This article is a summary of the expanded column method and a report on its implementation.