Modeling hydrogeological conditions for antilandslide measures justification on the plot of the Kama river embankment in Perm

The topic is relevant due to the necessity of forecast ways improvement and protection of the territories against flooding and the accompanying processes. Civil construction, urban density, underground utility system, change of a natural relief cardinally changes the natural geological environment within the developed territory. New layers of industrial temporary waters are developed under several factors (building development, rocks contraction under the stress of construction engineering facilities). The objective of the present research is to study geological, hydrogeological and hydrodynamic conditions for a long-term change forecast for construction of additional retaining walls along the Kama river embankment and short-term change forecast - for high water. Research technique. Basic data for the research are the field materials of JSC Sibgiprotransput received in 2013-2014 with the direct involvement of Darya V. Purgina in engineering-geological and hydrogeological conditions studying at all stages of the research. In the course of the work 66 wells are drilled (including four horizontal and two inclined wells), 20 holes are trenched, more than 600 samples are selected. Static and dynamic penetration test, rotational shear soils testing, static plate load test were used in field soil investigation. Two cluster and five single pumping tests were carried out for reliable estimation of filtration characteristics. The hydrogeological survey was completed, more than 50 observation points were described. The full complex of rock mechanics is carried out in laboratory setting. For the soils, lying above the groundwater level, the filtration coefficient is defined by standard consolidation. The main method of an assessment of influence of new retaining walls or changes of conditions of groundwater recharge was a numerical modeling with the use of the decisive module realizing the algorithm of the solution of the differential equation of a non-standard planned filtration according to the method of final differences [1]. As preprocessors the Surfer and AutoCad software systems were applied. The results. Hydrogeological and hydrodynamic conditions of a research site are studied in detail, the hydrodynamic numerical model is created, the forecast of underground water levels change at surface water level rise at high-water season is made, predictive map of flooding area is built, groundwater backwater in the existing wall is investigated, the possibility of a bar