Development of a Unified Geotechnical Database and Data Processing on the Example of Nur-Sultan City

Zhussupbekov, Askar; Alibekova, Nurgul; Akhazhanov, Sungat; Sarsembayeva, Assel

doi:10.3390/app11010306

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…The results of the physical and mechanical properties of the soils of the foundation of the construction site are shown in Table 2. The degree of soil aggressiveness (SNiP 2.03.11-85) about W4 grade concrete varies from weak to strong, and on sulfate-resistant cement grades, non-aggressive, in a single case, non-aggressive soils are found [10].…”

Section: Tests Of Bored Piles Installed By Dds Technology For Static ...mentioning

confidence: 99%

Investigation of the Interaction of the Bored Micro Pile by DDS (Fdp) Technology With the Soil Ground

Issakulov¹

2023

GEOMATE

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The article presents the results of a comparative analysis of the bearing capacity of bored piles with a drilling displacement system (DDS), obtained by tests for static load and according to GOST standards, as well as the results of tests for compression of the surrounding soil after installing the pile with DDS. These DDS piles are created by rotary drilling with a simultaneous full displacement of the soil in a horizontal direction. The optimal design of DDS piles can be obtained in soils that allow for a horizontal displacement, which causes an increase in the shaft's resistance. It is shown that drilling and ramming technologies of pile foundation construction play an important role in modern urban planning, but they are not fully universal. Actively developing, they replace traditional methods using dynamic and vibratory impacts, as they are more gentle to nearby buildings, which is most relevant for cities with dense urban development. According to the project design, the field tests of DDS bored piles with a diameter of 410 mm, and length of 6 m was performed by two static loading tests. The static loading tests were performed by GOST 5686-2012. This paper shows the results of the load-settlement and feed rate of the deep auger for pile diagrams 1 and 2 from those field tests that make it possible to determine the bearing capacity of piles on a given soil. The analysis signified that the bearing capacity of the six-meter-high bored piles meets the design requirements.

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Section: Tests Of Bored Piles Installed By Dds Technology For Static ...mentioning

confidence: 99%

Investigation of the Interaction of the Bored Micro Pile by DDS (Fdp) Technology With the Soil Ground

Issakulov¹

2023

GEOMATE

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“…For visual imaging are used a program PDI-TOMO is an extension of the CHA-W software designed for superior tomographic analysis results from CHAMP data with increased efficiency for the user. The field test result of the integrity of bored pile shows in Table 1 [5] and defectson the pile body are as shown in Fig. 2.…”

Section: Interpretations Of Test Datamentioning

confidence: 99%

Vertical Displacement of Bored Piles Group for Project of LRT Using Numerical Analysis

Zhussupbekov¹,

Shakirova²,

Sarabekova³

et al. 2021

GEOMATE

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This article discusses the problem of the bearing capacity of piles with defects in the pile body. Field trials were performed using the non-destructive Sonic Logging (CSL) method. The object of the study is bored piles with a diameter of 1.0 -1.5 m and a length of 8 -55 m. This article solves the problem of bearing capacity of piles with defects of 10%, 20% and 30%, respectively, in the body of the pile. For modeling, we used load test data from bored piles at the LRT construction site. In this study, only the maximum strain value is needed to compile several cases with various defects using two-dimensional finite element analysis (FEMA) based on the Midas-GTS NX program. According to the results of field tests and modeling of piles, it was found that more than 20% of piles have defects. Field data and numerical simulations have also been confirmed on the recommendation of Bjerrum.

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“…Soils in the city are represented by alluvial mid-Quaternary modern deposits with a thickness of 0.9 to 10.0 m, consisting of sandy clay soils with interlayering loamy sands and sandy clay loams, and clays and silty soils, which can be considered as a highly compressible and frost susceptible base. Eluvial formations of the weathering crust occur as sandy clay loams located beneath the sand and gravel alluvial formations at a depth of 6.0-10.0 m. Gravelly, gruss and rubble soils of eluvial formations of the weathering crust with sufficient bearing capacity have been found at a depth of 7.0 to 23.0 m. [4]. The filtration coefficient for alluvial medium-upper Quaternary modern soils ranges from 0.2-0.6 m/day for alluvial sandy clay soils, 3.8 ÷ 15.7 for medium size sands and 17.32-30.29 m/day for gravel and gravel soils.…”

Section: Introductionmentioning

confidence: 99%

Heat and Mass Transfer by Vapour in Freezing Soils

2022

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Vapour mass transfer is often underestimated when designing the bases for structures in frost susceptible soils. Intensive and long-term vapour transport may lead to excessive frost heaving and associated issues. A vapour transport model and the algorithm of its calculation is presented in this study based on the results of experimental freeze–thaw cycles of nine soil samples with varied density. The temperature field distribution, air voids volume and the energy comprising latent heat for the phase transition and heat extracted during the temperature drop are the main parameters for determining the vapour velocity and the amount of ice formed. According to the results, the average speed of vapour transport in frozen soils was about 0.4 m/h. The amount of ice built in 1 h during uniaxial freezing due to the saturated vapour pressure difference was 1.64 × 10−5–3.6 × 10−⁵ g/h in loose samples and 1.41 × 10−⁶ g/h to 5.61 × 10−⁷ g/h in dense samples of 10 cm diameter and 10 cm high sections. The results show that vapour mass transfer can increase the risk of ice growth and related problems.

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Development of a Unified Geotechnical Database and Data Processing on the Example of Nur-Sultan City

Cited by 9 publications

References 16 publications

Investigation of the Interaction of the Bored Micro Pile by DDS (Fdp) Technology With the Soil Ground

Investigation of the Interaction of the Bored Micro Pile by DDS (Fdp) Technology With the Soil Ground

Vertical Displacement of Bored Piles Group for Project of LRT Using Numerical Analysis

Heat and Mass Transfer by Vapour in Freezing Soils

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