Construction of Deep Foundation Ditch under a Reconstructed Multi-storey Building on the Main Avenue of St.Petersburg

Mangushev, R. A.; Geotechnic,; Osokin, A. I.

doi:10.1016/j.proeng.2017.05.099

Cited by 6 publications

(4 citation statements)

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“…At the same time, their conditional viscosity was in the range of 36-37 s. This is not much higher than the water conditional viscosity that is equal to 32 s. Such suspensions have a good penetrating ability and allow obtaining soil-concrete when injected into sandy soil. Consolidation of soils has different purposes: consolidation of unstable soils, construction of ground water cutoffs and increase of bearing capacity of the soil for the foundation bases [44][45][46][47][48][49][50]. The bases under the foundations should have increased compressive strength.…”

Section: Research Results and Discussionmentioning

confidence: 99%

Micro-Cement for Injection Consolidation of Base Soils

Smirnova*,

Glazev,

Komolov

et al. 2019

IJITEE

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Issues of development of compositions of injectable materials on inorganic basis for underground and transport construction are considered in the paper. Inorganic binders for aqueous suspensions for strengthening of low-strength sandy and debris soils by injection into the fortified massif are proposed. The use of silica gel in combination with hydrated lime for injectable aqueous suspensions is justified. The influence of superplasticizer on the technological properties of suspensions is shown. The properties of micro-cement of different compositions are presented. Optimal ratios of components were determined. The following properties of aqueous suspensions have been studied: viscosity, sedimentation and penetrating power. The viscosity was up to 40 s, sedimentation up to 1.4%. Soil-concrete obtained by injecting the aqueous suspension based on composite binders has the compressive strength in the range of 3.3-6.2MPa.

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Section: Research Results and Discussionmentioning

confidence: 99%

Micro-Cement for Injection Consolidation of Base Soils

Smirnova*,

Glazev,

Komolov

et al. 2019

IJITEE

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“…Among the various methods for removing heavy metals from water bodies and liquid waste, adsorption is the most commonly employed, as it is easy, cost-effective, and dominant. Activated carbon derived from plants, animals, and carbonaceous minerals is widely used as an adsorbent material [4] [5]. Heavy metal pollution of the environment has become increasingly severe in recent years.…”

Section: Introductionmentioning

confidence: 99%

Study of Adsorption of Lead Metal (Pb) Using Chemically Acti-vated (Nypa Fruticans) Powder Biosorbent

Meriatna,

Hakim,

Masrullita

et al. 2023

Int. J. Eng. Scie. and Inform. Technology.

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Heavy metal contamination in the environment is now quite concerning, and it is hazardous if it enters the body. Continuous human interaction with heavy metal lead (Pb) will result in various health problems. Nipa palm is a palm (Palma) thrives in mangrove forest habitats or along the seashore, with a cellulose content of 35.1%, 26.4% hemicellulose, and 17.8% lignin. This research aims to see if palm fronds (Nypa fruticans) can be used as a biosorbent to remove the heavy metal Pb in artificial solutions. The analysis was carried out in phases, beginning with the creation of biosorbents from Nipah fronds by decreasing their size to powder and drying them in the sun, followed by analyzing the efficacy of the biosorbents and the number of functional groups using the FTIR instrument. The research was carried out by varying the particle size of the nipa palm frond adsorbent, namely 40, 60, and 80 mesh, as well as contact times of 30, 60, 90, and 100 minutes, to determine the level of adsorption absorption and the adsorption mechanism using the Langmuir and Freundlich isotherm equation approach. The Pb solution used had a concentration of 20 ppm. The results showed that the maximum metal absorption level was 99.29% at a particle size of 80 mesh with a contact time of 100 minutes. The absorption mechanism is close to the Langmuir isotherm equation with R2 = 0.9998. It is suspected that the adsorption process occurs in one layer (monolayer) of the adsorbent.

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“…To date, the pile-raft foundations are one of the most effective developments in the foundation engineering field [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. They successfully apply in the design of multi-storey facilities on sites with unfavorable geological conditions, so far as they have an increased bearing capacity [2,[20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…In such conditions, it is important to carry out full-scale and numerical researches of the building load-bearing frame stress-deformed state in order to assess their residual resource and the necessity for reconstruction (strengthening). A large number of works are devoted to the reconstruction of buildings and structures [4,[15][16][17][18][19]. But these sources do not consider the influence of the foundation with piles of various lengths on the above-ground structure behavior.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

2021

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During the building reconstruction with floors addition, there is a need to evaluate the building frame and foundation soil bearing capacity, especially if there are deviations from the design parameters. As a result of the field and numerical studies, we determined the basic change patterns in the stress-strain state of the 12-storey building load-bearing structures with a monolithic reinforced concrete frame due to uneven pile foundation deformation. We also found the influence degree of the existing deviations from the design parameters to the structures bearing capacity. The research results can be applied in reconstruction conditions with a significant increase in the load on the existing load-bearing elements of the building and on the pile foundation.

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Construction of Deep Foundation Ditch under a Reconstructed Multi-storey Building on the Main Avenue of St.Petersburg

Cited by 6 publications

References 0 publications

Micro-Cement for Injection Consolidation of Base Soils

Micro-Cement for Injection Consolidation of Base Soils

Study of Adsorption of Lead Metal (Pb) Using Chemically Acti-vated (Nypa Fruticans) Powder Biosorbent

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

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