Practice of geotechnical construction in constrained urban areas

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The problems of underground space development in the constrained conditions of existing production facilities are a complex geotechnical task and require a specific approach. The presence of weak engineering-geological elements significantly aggravates geotechnical works. The foundations bearing capacity increasing is always under the close attention of geotechnicians, designers and builders. The use of drill-injection piles, constructed with non-standard physical processes in most cases, solves many complex and atypical geotechnical problems successfully. To ensure the design load-bearing capacity of monolithic reinforced concrete grillages with defective piles, it is proposed to supplement them with drill-injection ERT piles with multi-seat extensions. Redesigning the entire pile field and all grillages, taking into account the test results of the experimental piles for bearing capacity, made it possible to ensure the design bearing capacity of the building entire foundation as a whole. It is shown that the lack of necessary step-by-step quality control and its negative consequences correction led to cost increase. It is recommended to exclude the possibility of such situations.

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Sobre autores

N. Sokolov

Chuvash State University named after I.N. Ulyanov; LLC NPF “FORST”

Autor responsável pela correspondência
Email: ns_sokolov@mail.ru

Candidate of Sciences (Engineering), Director

Rússia, 15, Moskovsky prospect, Cheboksary, 428015; 109a, Kalinina Street, Cheboksary, 428000

Bibliografia

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  9. Ter-Martirosyan Z.G., Ter-Martirosyan A.Z., Angelo G.O. Interaction of a crushed stone pile with the surrounding soil and grillage. Osnovaniya, fundamenty i mekhanika gruntov. 2019. No. 3, pp. 2–6. (In Russian). EDN: ZJHDYG. https://ofmg.ru/index.php/ofmg/article/view/6026
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  11. Ter-Martirosyan A.Z., Anzhelo G.O., Chan M.T. Theoretical basis for forecasting the expansion of the diameter of the leading well in watersaturated soil with a crushed stone bored pile. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2024. No. 9, pp. 14–21. (In Russian). EDN: AQPQUV. https://doi.org/10.31659/0044-4472-2024-9-14-21
  12. Sokolov N.S., Viktorova S.S., Fedorova T.G. Piles of increased bearing capacity. New in architecture, design of building structures and reconstruction: Materials of the VIII All-Russian (II International) Conference. Cheboksary. 2014, pp. 411–415. (In Russian). EDN: UMHMPD
  13. Sokolov N.S., Petrov M.V., Ivanov V.A. Problems of calculation of drilling piles made using discharge-pulse. New in architecture, design of building structures and reconstruction: Materials of the VIII All-Russian (II International) Conference. Cheboksary. 2014, pp. 415–420. (In Russian).
  14. Sokolov N.S., Sokolov S.N., Sokolov A.N. Finegrained concrete as a structural building material of drilling piles ERT. Stroitel’nye Materialy [Construction Materials]. 2017. No. 5, pp. 16–19. (In Russian). EDN: YQGACB. https://doi.org/10.31659/0585-430X-2017-748-5-16-19

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2. Fig. 1. Reinforcement of the deformed existing retaining wall of the construction pit fence: 1 – steel pipes Ø1000 mm as struts; 2 – monolithic reinforced concrete buttresses; 3 – fence of the construction pit (drill-injection piles, 50 mm thick board fence)

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3. Fig. 2. Reinforcement of the deformed existing retaining wall of the construction pit fence: 1 – monolithic reinforced concrete buttresses; 2 – finished pit fence made of bored piles; 3 – completed pit fence made of monolithic reinforced concrete

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4. Fig. 3. Construction joint of monolithic reinforced concrete buttress with the existing pile foundation of a residential building

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5. Fig. 4. Fragments of made monolithic reinforced concrete buttresses: 1 – monolithic reinforced concrete buttresses; 2 – existing pit fence made of bored piles; 3 – completed pit fence made of monolithic reinforced concrete; 4 – steel pipe (struts)

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