Досвід закріплення слабкої основи фундаменту вертикальними ґрунтоцементними елементами з використанням технології ґрунтозмішування

Abstract

Urgency of the research. Most construction sites in Ukraine have soil conditions area created by weak soils. Permanent pursuit of economical of engineering solutions require the use of new design solutions in the construction on weak soils. Target setting. In the last years new ways to fixing base of foundations using drill-mixing technology are gaining popularity. In the process of drilling a special wing bit is a destruction of natural soil and mixing with cement solution. As a result of solidification mixture formed is solid soil-cement element. Actual scientific researches and issues analysis. It has been previously performed in the laboratory study of strength soil-cement vertical elements depending on the amount of cement composition "soil-cement"¸ water-cement ratio in the mixture clay-cement additives properties. In order to a preliminary assessment of effectiveness fixing foundation using drill-mixing technology numerical simulation was performed. Uninvestigated parts of general matters defining. Using the weak soils as the basis for foundations of buildings and structures is seen in view of the possible destruction of their structure and the development of non-uniform deformation. The research objective. Perform evaluation of the effectiveness of fixing the building foundations on the example of a real construction site. The statement of basic materials.. In practice fixing foundations was performed using drill-mixing technology at the construction site in the city of Kiev. The article presents data about the experience fixing of weak base foundation, composed bulk soils with the contents of construction and domestic garbage. Fixing performed by soil-cement vertical elements using drill-mixing technology. Conclusions. The choice of a rational scheme of «basis - the foundation - over ground part of the building» should be based on an objective assessment of the mechanical properties of soil, and bearing structures of the building. Applying the basics fixing technology has allowed to reduce the cost of foundation structures up to 20 %.