The aim of the research is to select an optimal variant of combined drainage for protecting the body of storage space of multi-functional logistic complex (MFLC) at groundwater level raising. The technique for calculating an optimal variant of combined drainage was considered and study of planned filtration in the area of MFLC was done at models by the electro-hydrodynamic analogy (EHDA) method. The objectives of the research were to study the whole scheme of ground water movement in the area of design building, to determine the width of capture zone of groundwater flow by underground drainage, as well as to find the main characteristics of filtration flow (rate of flow to drainage, zone of drainage influence on groundwater lowering). The study results of plan models of filtration by EHDA method were confirmed by the results of filtration calculation. The total rate of flow of combined drainage (at the similar drainage schemes) obtained as a result of calculation was 39.46 cubic meters per day and using EHDA method – 43.75 cubic meters per day. The analysis of profile schemes of the study and filtration calculation has shown that circular horizontal drainage is required only for the building number one where the level of groundwater is higher than a base of foundation. For the building number two where the level of groundwater is lower than a base of foundation protective drainage is inappropriate. For the building number one it is recommended the drainage system which includes circular horizontal drainage along the contour of the building and central drain axially the building, wherein to protect the natural foundation of floors from moisture it is proposed to deepen the construction of circular horizontal drainage by 1.5–2.5 m lower a base of foundation.
Keywords: drainage, deepened drain, underground foundation, lockup by ground waters, multi-functional logistic complex, circular pipeline.
