PROCESSES AND PHENOMENA ASSOCIATED WITH BACKFILLING OF PITS ON THE TERRITORY OF THE CITY

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11 сентябр 2023

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PROCESSES AND PHENOMENA ASSOCIATED WITH BACKFILLING OF PITS ON THE TERRITORY OF THE CITY

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Technical science and innovation

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In the article, the authors consider the processes and phenomena associated with backfilling of pits on the territory of the city. In the conditions of intensive development of high-rise and underground construction in the territories of cities, the development of engineeringgeological processes and phenomena associated with the construction of pits and, subsequently, backfilling of these structures is increasingly observed. The assessment of engineering and geological conditions occurs only at the stage of the technical project, when conducting detailed engineering and geological surveys to substantiate the construction project. It should be noted that underestimation of processes and phenomena related to both geological and climatic, and human economic activity leads to negative consequences. In this regard, we have set a goal to study the processes and phenomena associated with backfilling of pits on the territory of Tashkent. The authors have identified the main sources of formation of processes and phenomena as a result of backfilling: -loss of strength of backfilling soils during water saturation; -increase of dynamic loads on the surface of areas with backfill soils. On linear communication structures are formed due to the combined action of several processes: 1) gravitational compaction of compressible rocks under the foundations of structures; 2) hydrodynamic compaction during drainage, 3) compaction under the influence of vibration from the movement of underground transport. Taking into account the results of all the analyses carried out, the main factors (from the most to the least dangerous) that affect the subsidence of the earth's surface on the backfill soils are: the location to the compressibility of the soil layers; soil moisture should be within the limits for sand — 8-12%, large and light sandy loam soil — 8-12%, heavy loamy soil — 16-23%.

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# foundation# structure# excavation# trench# underground space# deformation modulus# engineering and geological condi# processes and phenomena# surface subsidence# muld# loess and loess-like rocks# road surface

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https://eroi.uz/11.0008/A0923-0004

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