| Collapsible loess is one of the most widely ranged zonal soils in our country. It covers nearly 60% of the total area of loess in China, which mainly distributes in the middle and western areas and the downstream of Yellow River. Since the reformation and opening, especially the great development of the West-china, civil engineering has developed rapidly in large scales in the middle and western areas. While our country is a developing country, how to economize the engineering investment under the premise of engineering quality is very important because of the shortage of construction funds. Cement-loess is a new construction material, which has low costs and low pollutions and which design is agile and which construction speed is high. Accordingly we deal with collapsible loess foundation with cement-loess piles, which can gain good technology economy effect. The significance of the study on cement soils is great in both theory and engineering practice.The engineering application and the study on cement-loess are still far behind other branches of the homogeneous subject even though rapid progress has taken place in this area.Through a large number of unconfined compression tests and triaxial compression tests, has the strength property and the water-stability of the cement-loess been analyzed. Some laws about the strength property of the cement-loess with different cement contents water ratio and varying with time were developed. Some properties of the cement-loess was developed and used in practice. At the same time, the author analyses the concretion mechanism of the cement-loess.Illuminated by the methods in which Chen W F used to study on the constitutive relationship of concrete and by the physics constitutive model of shaft provided byShen Zhujiang, the author raised the elastic entirely failure model of cementation shaft when studying on the constitutive relationship of cement-loess. The result of the calculation and analysis is valuable to designer and builder.
|
PDF Full Text Request