Abstract
Numerical modelling of geomaterials is always complex due to the variability of parameters within the soil massif (created in the natural geological processes) and the orthotropy caused by this. In the case of the soil substrate modification with the use of hydraulic binders, this issue is complicated even more due to the fact the degree of mixing can be differentiated for various areas, while in the dry mixing technology, it is additionally differentiated with the depth of consolidation stress. Additional factor that makes it difficult to predict the behaviour of stabilised soil is the possible content of organic parts. Due to the development of substrate reinforcement technology, as well as the growing market for such works, a need emerged to provide parameters of the numerical model for various materials or, at least, to provide a method for reverse analysis on the basis of available data. This paper presents an example of calibration of the selected numerical model (through parameter selection of this model) based on the conducted examinations of cubic sample in the conditions of uniaxial compression. The results of laboratory tests, reverse analysis in the numerical model with a pre-selected strength hypothesis and finally, the recommendations for selection of the model in calculations of real structure on a reinforced substrate, are demonstrated.
Highlights
Numerical modelling of geomaterials is always complex due to the variability of parameters within the soil massif and the orthotropy caused by this
The numerical model requires the introduction of unambiguous values, while in the case of soil-cement materials, it is even difficult to obtain any approximate data
It is noticeable that the wet mixing technology provides several times more beneficial parameters than in the case of dry mixing. It is recommended for a good reason to use dry mixing technology only in the case of soils with a minimum moisture content of 60%
Summary
Numerical modelling of geomaterials is always complex due to the variability of parameters within the soil massif (created in the natural geological processes) and the orthotropy caused by this. The main purpose of this work is the secondary determination of parameters of a dry-mixed soil-cement material [1, 2] Such material is obtained as a result of mixing the binder with the native soil without additional provision of water. It is necessary to remember that this is an upper estimation of the strength of a given material, which is only possible to obtain in laboratory conditions The examples of such technological design procedures were provided in the works conducted within the research program at the Wrocł aw University of Science and Technology. The tests were conducted for two various technologies: wet mixing with the use of cement binder [3] and ashes [4], as well as dry mixing [5, 6]. It has been proven that the metallurgical cement works in the best manner in the sandy soil, while in the case of clays and loams, it is good to use quicklime or lime with cement
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
