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深层搅拌法是用水泥作为固化剂,通过特制的深层搅拌机械,在地基深部就地将软粘土与固化剂强制拌和,使软粘土硬结而提高地基强度。这种新的地基加固方法适用于加固软粘土特别是超软土。本文介绍该技术的主要内容:①室内试验研究;②深层搅拌机械的研制;③深层搅拌法加固软粘土地基的现场试验和工程应用。该加固方法经技术鉴定认为:所研制的SJB-1型深层搅拌机、相应的搅拌工艺及专用固化剂配方等已基本形成一套适合我国条件的陆上深层搅拌技术,为我国软土地基加固技术增添了一种新方法,今后可在软土地基加固工程中逐步推广应用。
The deep mixing method uses cement as a curing agent, and through a special deep-mixing machine, the soft clay and the hardener are forcedly mixed at the deep part of the foundation to make the soft clay hard and improve the strength of the foundation. This new ground reinforcement method is suitable for reinforcing soft clays, especially super soft soils. This article describes the main contents of the technology: 1 laboratory test; 2 the development of deep mixing machinery; 3 deep mixing method to reinforce the soft clay ground test and engineering applications. The reinforcement method has been technically assessed that the developed SJB-1 deep mixer, the corresponding mixing process and the special curing agent formulation have basically formed a set of onshore deep mixing technology suitable for China’s conditions, which is a reinforcement technology for China’s soft soil foundation. A new method has been added, which will be gradually applied in soft soil foundation reinforcement projects in the future.