Experiment Research Of Mechanical Property Of Modified Cement-Stabilized Soil Depend On Reinforced Expand Branch Disk Cement-Stabilized Soil Pile

With the continuous development of our country’s economy and society, the urban land resource is increasingly scarce, lead to the increasing demand for underground space. When the underground part of a structure below the underground water level, groundwater will have obvious buoyancy effect on the structure, anti-floating measures need to be adopted to ensure the safety of the structure. In recent years, Reinforced Expand Branch Disk Cement Soil Pile (REBDCSP) has been used in several parts of domestic to resist the buoyancy of groundwater to the structure. Because of it’s uplift bearing capacity is bigger, construction technology is simple, little pollution to surrounding environment, and cheep materials, produced good economic and social benefits.In order to apply this anti-floating measures with many advantages to the region, and serve the engineering projects, this paper combined with the local common two kinds of soil, as well as one patent additive with good effects has been showed in other projects, laboratory tests and finite element analysis method is adopted to study the following content, hope the results can offer reference for engineering application in the region.(1) Analyse the effects of the additive. Compared the strength and deformation characteristics of Cement Stabilized Soil (CSS) before and after the patent additive added. Get patent additive’s effects on the properties of the CSS’s strength and deformation.(2) Analyse the influencing factors of the strength and deformation properties of the modified CSS mixed with additive.(3) Analyses the deformation properties of CSS. Analysis the relationship between the deformation modulus, failure strain and strength, provide a reference for application.(4) Kondner hyperbolic model and softening curve have been respectively used to fit the CSS’s hardening and softening stages’stress-strain relationship under uniaxial and triaxial stress state. The results display that the Kondner hyperbolic model reflect the CSS’s hardening stage’s nonlinear characteristics well, the softening curve cann’t reflect the softening stage’s nonlinear characteristics under triaxial stress state well, but uniaxial stress state.(5) According the results of laboratory test, the finite element software has been used to establish model of the single pile. The patent additives’effects on REBDCSP’s strength and deformation properties under different cement mixing ratio, different curing period has been analyzed.