Development of Technological Settlement of Building Foundations in the Process of High-Frequency Vibration Extraction of Piles

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Modern construction of a developed underground space requires a mandatory assessment of the impact on the surrounding buildings, that is, the determination of the so-called additional settlement. At the moment, there are clear methods for assessing the impact of digging pits and static loading of foundations from newly erected buildings on neighboring structures, carried out using numerical calculation methods. However, difficulties arise in determining additional settlement under technological influences, such as vibration immersion and vibration extraction of the sheet piling of a pit, as well as with various technologies for the manufacture of pile foundations. Modern building codes do not provide clear methods for such cases, although in practice process settlement can account for more than 70% of the total additional settlement of the building during the entire construction period. In this study, the authors present an analytical and numerical approach to calculating technological settlement from vibratory sheet pile extraction, which correlates well with observed real-world results.

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作者简介

V. Polunin

Saint-Petersburg State University of Architecture and Civil Engineering

编辑信件的主要联系方式.
Email: n1ce2u@yandex.ru

Candidate of Sciences (Engineering)

俄罗斯联邦, 4, 2nd Krasnoarmeiskaya Street, St. Petersburg, 190005

A. Melnikov

LLC “Engineering Company “Gorod A”

Email: a.melnikov@ec-goroda.ru

Candidate of Sciences (Engineering), Executive Director

俄罗斯联邦, 26a, liter “B” 30-Н, Egorova Street, Saint-Petersburg, 190005

M. Druzhinin

LLC “Engineering Company “Gorod A”

Email: m.druzhinin@ec-goroda.ru

Chief Geotechnician

俄罗斯联邦, 26a, liter “B” 30-Н, Egorova Street, Saint-Petersburg, 190005

A. Tukkiya

LLC “Engineering Company “Gorod A”

Email: a.tukkiya@ec-goroda.ru

General Director

俄罗斯联邦, 26a, liter “B” 30-Н, Egorova Street, Saint-Petersburg, 190005

参考

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2. Fig. 1. The proposed calculation scheme for predicting additional deformations caused by vibration processes of sheet piles

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3. Fig. 2. Curve of vibration damping with distance (a); Zones of change in deformation moduli in the calculation scheme (b)

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4. Fig. 3. Plan of the structure with sedimentary marks

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5. Fig. 4. Landing the object in question on geology

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6. Fig. 5. Situation scheme

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7. Fig. 6. Sedimentary deformation graph

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8. Fig. 7. The attenuation graph measures the vibration acceleration of the soil with distance from the sheet pile during the process of vibration removal of the sheet pile. The red bracket is limited by the permissible level of vibration acceleration results

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9. Fig. 8. Calculated deformations obtained from the analytical solution for grades 3 and 4

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10. Fig. 9. Forecasting the radii of change in soil deformation parameters during the process of vibratory excavation of sheet piles

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11. Fig. 10. General view of the design diagram

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12. Fig. 11. Additional calculated settlement when removing sheet piling (smax,add = 27,5 mm)

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