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我国地域辽阔,地质情况复杂,各种软土层分布范围广,土层厚度大。其特点是含水量高,孔隙比大,抗剪强度低,压缩系数高,渗透系数低,沉降稳定时间长。因此,软土地基加固是大量民用多层建筑首先要解决的问题。深层搅拌法是用于加固饱和软粘土地基的一种新方法,它是利用水泥、石灰等材料作为固化剂的主剂,通过特制的深层搅拌机械,在地基深处就地将软土和固化剂(浆液或粉体)强制搅拌,利用固化剂和软土之间所产生的一系列物理一化学反应,使软土硬结
China has a vast territory, complex geological conditions, a wide distribution of soft soil layers, and a large thickness of soil. It is characterized by high water content, large void ratio, low shear strength, high compression coefficient, low permeability coefficient, and long settling time. Therefore, the reinforcement of soft soil foundations is the first problem to be solved for a large number of civil multi-storey buildings. Deep mixing method is a new method used to reinforce saturated soft clay ground. It uses cement, lime and other materials as the main agent of the curing agent. Through a special deep mixing machine, the soft soil and curing are deep in the ground. The agent (slurry or powder) is forced to stir, using a series of physical-chemical reactions between the curing agent and the soft soil to make the soft soil hard