Water drawdown and dewatering as a method of preliminary drainage of the territory of the park of Academician Sakharov, St. Petersburg
https://doi.org/10.26897/1997-6011-2022-5-36-44
Abstract
The purpose of our work is to determine the causes of overwetting of the territory, to design a temporary pre-drainage system that ensures the effective removal of excess water during the construction of a permanent drainage system in the conditions of the Academician Sakharov Park. The main causes for excessive moisture withinthe object are: humid climate(precipitation exceeds evaporation by 2.8 times), shallow occurrence of the aquifer confining layer, high ground water position, which leads to the formation of headwater lenses during the year. According to climatic and hydrogeological studies, prior drainage should be carried out before starting work on the construction of a drainage system. The article considers in detail the design features of the water drawdown and dewatering, as well as the stages of construction. According to calculations on dewatering in the conditions of the Academician Sakharov Park with the capacity of the drained aquifer1.0…1.4 m, the average depth of the confining layer 2.0 …2.3 m and trench lengths from 110 …225 m, the time for drainage is 5…6 days, and the estimated infl ow of water to the mouth of the trench is within 3.29…3.85m³/day. To ensure effective work on dewatering from a trench with lengths of up to 225 m and with a drained aquifer capacity of up to 1.4 in the hydrogeological conditions of the territory of the Sakharov Park, it is recommended to use domestic pumping and power equipment of the «Vihr» type DN-400 with a fl ow rate of 11.5 m³/h.
Supporting agencies: The article was prepared with the support of the Ministry of Education and Science of Russia within the framework of the agreement No. 075-15-2021-032 of March 23, 2021 on the provision of a grant in the form of a subsidy for the creation and development of an engineering center on the basis of an educational organization of hi gher education and (or) a scientifi c organization as part of the implementation of the federal project «Development of infrastructure for scientific research and personnel training» of the national project «Science and Universities».
About the Authors
R. V. Kalinichenko
Russian state agrarian university – МAА named after C.А. Timiryazev
Russian Federation
Russian Federation
candidate of agricultural sciences, associate professor,
125434, Moscow, B. Academicheskayul., 44
K. S. Semenova
Russian state agrarian university – МAА named after C.А. Timiryazev
Russian Federation
Russian Federation
candidate of technical sciences, associate professor,
125434, Moscow, B. Academicheskayul., 44
O. V. Kablukov
Russian state agrarian university – МAА named after C.А. Timiryazev
Russian Federation
Russian Federation
candidate of technical sciences, associate professor,
125434, Moscow, B. Academicheskayul., 44
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Review
For citations:
Kalinichenko R.V., Semenova K.S., Kablukov O.V. Water drawdown and dewatering as a method of preliminary drainage of the territory of the park of Academician Sakharov, St. Petersburg. Prirodoobustrojstvo. 2022;(5):36-44. (In Russ.) https://doi.org/10.26897/1997-6011-2022-5-36-44
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