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A platform for research: civil engineering, architecture and urbanism
Ways to reduce metal consumption in the construction of sunken shafts
Conclusions 1. A number of positions taken in active documents regulating questions concerning the computation and design of sunken shafts embedded without a thixotropic jacket are highly conditional and require more precise definition. This applies primarily to the computation of wall failure during hang-up of the lower section of the shaft and the soil pressures on circular shafts possessing diameters to 16 m with allowance for their actual curvature. 2. The method recommended in the present paper for the design of circular sunken shafts with diameters to 16 m and depths to 10–12 m makes it possible to reduce significantly (by 25–30% on the average) the amount of reinforcement in the upper section of the shaft wall as compared with its consumption for type designs without impairing the strength of the structures. 3. It is expedient to disseminate construction experience acquired with lightly reinforced sunken shafts in Vyaz'ma, Leningrad, and Moscow for structures of similar dimensions under various engineering-geologic conditions using the manual of structural solutions and technological schemes for work production developed by the Leningrad Division of the State Institute for the Design and Planning of Beds and Foundations. 4. In sinking lightly reinforced shafts, it is necessary to follow especially carefully the conditions set forth in the plan for work production, particularly the excavation of soil in the blade segment, prohibiting their skewing so as to ensure uniform pressure between the shaft walls and ground.
Ways to reduce metal consumption in the construction of sunken shafts
Conclusions 1. A number of positions taken in active documents regulating questions concerning the computation and design of sunken shafts embedded without a thixotropic jacket are highly conditional and require more precise definition. This applies primarily to the computation of wall failure during hang-up of the lower section of the shaft and the soil pressures on circular shafts possessing diameters to 16 m with allowance for their actual curvature. 2. The method recommended in the present paper for the design of circular sunken shafts with diameters to 16 m and depths to 10–12 m makes it possible to reduce significantly (by 25–30% on the average) the amount of reinforcement in the upper section of the shaft wall as compared with its consumption for type designs without impairing the strength of the structures. 3. It is expedient to disseminate construction experience acquired with lightly reinforced sunken shafts in Vyaz'ma, Leningrad, and Moscow for structures of similar dimensions under various engineering-geologic conditions using the manual of structural solutions and technological schemes for work production developed by the Leningrad Division of the State Institute for the Design and Planning of Beds and Foundations. 4. In sinking lightly reinforced shafts, it is necessary to follow especially carefully the conditions set forth in the plan for work production, particularly the excavation of soil in the blade segment, prohibiting their skewing so as to ensure uniform pressure between the shaft walls and ground.
Ways to reduce metal consumption in the construction of sunken shafts
Klimov, V. T. (author) / Ol'shevskii, G. F. (author) / Rukavtsov, A. M. (author) / Serebro, A. Ya. (author) / Almazov, A. N. (author) / Nikolaevskii, M. Yu. (author)
1979
Article (Journal)
English
Local classification TIB:
770/6545/8000
BKL:
56.20
Ingenieurgeologie, Bodenmechanik
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