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5SCIENTIFIC PROGRESS VOLUME 3 I ISSUE 7 I 2022 _ISSN: 2181-1601
Scientific Journal Impact Factor (SJIF 2022=5.016) Passport: http://sjifactor.com/passport.php?id=22257
OPERATION OF BUILDINGS ON SEDIMENTARY SOILS
B. A. Otakulov Z. B. Mahmudov
PhD, Fergana Polytechnic Institute Student, Fergana Polytechnic Institute
ABSTRACT
Non-fulfillment of a number of requirements during the operation of buildings on foundations consisting of unstable soil layers leads to serious deformation of load-bearing structural elements
Key words: soil layers, mechanical effects, pure soils
Non-fulfilment of a number of requirements during the operation of buildings on foundations consisting of unstable soil layers will cause serious deformation of load-bearing structural elements.
Unstable structural soils forming the foundation of the building are related to soils that drastically change their physical and mechanical characteristics, leading to serious local settlement when certain operational requirements are not met and under the additional influence of the external environment. Additional external influences that lead to such settling include mechanical and physical influences. Mechanical effects are measured by the magnitude and growth rate of thermal loads. Among the physical effects on sedentary soils, wetting of the base is considered more dangerous. the simultaneous occurrence of mechanical and physical effects in sedentary soils will have even more negative consequences. For example: free wetting of pure soils often does not result in additional compaction.
When these soils are moistened together with the impact of the load, it leads to sharp settlement. In permeable soils in tension at the base of the foundation, in addition to the normal settlement due to vertical loading, additional settlement may occur from soil wetting. Such additional subsidence is called subsidence, and soils are called sedentary. They are also called macroporous because their pores can be distinguished with the naked eye.Pure soils are divided into 2 types when moistened according to the amount of sedimentation and its specific mass: Under the influence of the specific mass of 1 Soils with a settlement of up to -035 cm 2- under the influence of specific mass Grouts with a settlement of more than -5cm.
Under operating conditions, a small amount of water is constantly exposed to the ground and causes the foundation to sink without the failure (accident) of the engineer's communications.
SCIENTIFIC PROGRESS VOLUME 3 I ISSUE 7 I 2022 _ISSN: 2181-1601
Scientific Journal Impact Factor (SJIF 2022=5.016) Passport: http://sjifactor.com/passport.php?id=22257
In the first case, the settlement of the building goes at a low speed (up to -12 mm per month), in the second case, the settlement speed is large and it can cause serious deformation of the load-bearing elements of the building.
In the second case, the sedimentation speed is 50 mmsut, and in the mountain regions up to 250 mmsut.
In order to determine the onset of soil settlement in time, it is necessary to constantly monitor the geometric position of the rafters installed on the buildings. it is necessary to measure the seating area at least once every 3 months during the first two years of building operation. If the water flow is known, soil permeability is measured daily.
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Scientific Journal Impact Factor (SJIF 2022=5.016) Passport: http://sjifactor.com/passport.php?id=222ff7
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Scientific Journal Impact Factor (SJIF 2022=5.016) Passport: http://sjifactor.com/passport.php?id=222ff7
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