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水泥粉喷桩属于水泥土搅拌桩中的干喷施工方法,水泥土搅拌桩适用于加固饱和粘性土和粉土等地基,它是利用水泥等材料作为固化剂通过特制的搅拌机械,就地将软土和固化剂(浆液或粉体)强制搅拌,固化剂吸收周围软土中的水分,使软土硬结成具有整体件、水稳性和高强度的水泥加固土,形成竖向承载的复合地基,从而提高地基土强度和增大变模,根据固化剂掺入状态的不同,可分为干喷和湿喷。按照设计方案,濮阳市金堤河张庄提排站改扩建工程三个单体工程均采用干喷法进行地基加固,本文就水泥粉喷桩施工技术方案以及处理效果进行阐述。
Cement powder spray pile is a dry grouting method in cement-soil mixing pile. Cement-soil mixing pile is suitable for reinforcing saturated clay, silt and other foundations. It uses cement and other materials as a curing agent through a special stirring machine, Forced agitation of soft soil and hardener (slurry or powder), hardener absorbs moisture from the surrounding soft soil, making the soft soil hard to form a solidified, monolithic, water-stabilized and high-strength cement-stabilized soil, forming a vertically- Composite foundation, thereby increasing the strength of the foundation soil and increasing the modulus, according to different curing agent incorporation, can be divided into dry and wet spray spray. According to the design scheme, the dry-jet method is used to reinforce the foundation for the three single-unit projects of the extension and expansion project of Jinzidai Pleat Station in Puyang City. In this paper, the technical scheme of cement powder injection pile construction and the treatment effect are described.