Tomsk State University Journal最新文献_第3页

Building foundation settlement in groundwater lowering on sliding territory of Lagerny Garden in Tomsk 托木斯克Lagerny花园滑动区地下水位下降中的建筑地基沉降

IF 0.1

Tomsk State University Journal Pub Date : 2023-06-25 DOI: 10.31675/1607-1859-2023-25-3-143-150

S. V. Yushchube, A. Tarasov, A. S. Ustyugov

{"title":"Building foundation settlement in groundwater lowering on sliding territory of Lagerny Garden in Tomsk","authors":"S. V. Yushchube, A. Tarasov, A. S. Ustyugov","doi":"10.31675/1607-1859-2023-25-3-143-150","DOIUrl":"https://doi.org/10.31675/1607-1859-2023-25-3-143-150","url":null,"abstract":"Groundwater lowering is a method of stabilizing landslide slopes. To date, the effect of water reduction on the technical condition of buildings has not been sufficiently studied. This may negatively affect the technical condition of buildings due to the development of additional deformation of foundations and foundation soils.Purpose: The aim of this work is to assess the impact of cased hole with filters on the technical condition of buildings in the area of groundwater lowering.Methodology/approach: Long-term field observations of the groundwater level at the water supply site; monitoring of the technical condition of buildings; analysis and generalization of the data obtained.Research findings: Based on annual monitoring of the building height, monitoring of changes in the building state and the engineering and geological analysis are performed in the period from 1987 to 2020. It is found that groundwater lowering leads to building deformation and a decrease in its technical condition due to nonuniform soil compaction in this area.Research implication: Groundwater lowering near buildings can significantly affect their technical condition due to the soil compaction even at a considerable distance from the waterlowering devices. In developing groundwater lowering projects, special attention should be paid to heterogeneity of the ground layer on the building site and its impact on the formation of relative deformation of buildings.","PeriodicalId":45402,"journal":{"name":"Tomsk State University Journal","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87943862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MgAl2O4-based glass ceramics synthesized by thermal plasma melting 热等离子体熔融法制备mgal2o4基玻璃陶瓷

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Tomsk State University Journal Pub Date : 2023-06-25 DOI: 10.31675/1607-1859-2023-25-3-151-161

V. Shekhovtsov

{"title":"MgAl2O4-based glass ceramics synthesized by thermal plasma melting","authors":"V. Shekhovtsov","doi":"10.31675/1607-1859-2023-25-3-151-161","DOIUrl":"https://doi.org/10.31675/1607-1859-2023-25-3-151-161","url":null,"abstract":"The relevance of research and application of glass-ceramic materials based on spinel (MgAl2O4) is due to its unique properties such as strength, heat resistance, and high thermal conductivity. These properties make spinel a popular material for creating hi-tech products and coatings.The paper presents the experimental results of the production spinel-based glass ceramics with the silicon dioxide content 10 to 50 wt.%. Thermal plasma melting is used obtain glassceramic samples, at 10 kW power and 90 s melting time. The obtained samples are studied by XRF, EDX, IRFS, SEM methods.It is shown that the introduction of SiO2 in the amount of not over 20 wt.% into the mixture with stoichiometric spinel, phase transformations with the formation of binary 2MgO·SiO2, MgO·SiO2, 3Al2O3·2SiO2 compounds do not occur. With increasing SiO2 content from 30 to 50 wt.%, the effect from SiO2 is significant, a quasi-amorphous phase appears in the material matrix. At the same time, the SiO2 content of 30 wt.% provides weak intensity of the stoichiometric crystalline phase MgAl2O4 at 2θ = 36.6, 44.7, 59.3, 65.4 degrees. Samples with the SiO2 content 40 to 50 wt.% are X-ray amorphous. In this case, the diffusion halo narrows due to the dominance of Si4+ during the lattice formation. This phenomenon is also confirmed by IRFS results.Based on SEM observations, a complete dissolution of the MgAl2O4 crystalline phase occurs. When the content of SiO2 is 30 to 40 wt.%, dissolution of the spinel crystalline phase is accompanied by the formation of local regions rich in Mg and Al, i.e., differentiation proceeds in the condensed phase.The research results will be of interest for the development of heat-shielding materials, and can be used for the catalyst development, in electronics and other industries producing hi-tech ceramics.","PeriodicalId":45402,"journal":{"name":"Tomsk State University Journal","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76925365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Concentrated effect of drying agents on mechanical performance of clay soil 干燥剂对粘性土力学性能的集中影响

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Tomsk State University Journal Pub Date : 2023-06-25 DOI: 10.31675/1607-1859-2023-25-3-169-184

E. N. Alkaev, A. Lunev

{"title":"Concentrated effect of drying agents on mechanical performance of clay soil","authors":"E. N. Alkaev, A. Lunev","doi":"10.31675/1607-1859-2023-25-3-169-184","DOIUrl":"https://doi.org/10.31675/1607-1859-2023-25-3-169-184","url":null,"abstract":"In modern construction, more and more attention is paid to the roadbed quality. At the same time, in most regions of the Russian Federation there is a shortage of natural building materials of the required quality. In this regard, methods of stabilizing natural clay soils should be developed to satisfy the regulatory documentation.Purpose: The chemical additive effect on mechanical properties of clay soil.Methodology: The proposed method of concentrated effect of drying agents (lime, active fly ash) can potentially improve the mechanical performance of clay soils, i.e., strengthen the soil. Compressive strength testing of clay soil (light powdery loam) includes its treatment in hydrated lime in the amount of 2, 4 and 6 wt.%, hydrated high-calcium fly ash in the amount of 4, 8 and 12 wt.%, and a combination of slaked lime and chemical additives-accelerators (CaCl2, FeSO4, NaOH) in the amount of 0.5 and 1.0 % of the dry soil mass.Research findings: Even small amounts of lime improve the clay soil strength, which exceeds the effect from the fly ash introduction by 194 %. CaCl2 and NaOH additives significantly accelerate the strength gain. The introduction of FeSO4 improves the strength gain kinetics at the first stage (up to 7 days) and further causes a complete destruction of the material structure. The compaction also shows a significant decrease in the tensile strength during the time between the dry agent introduction and compaction.","PeriodicalId":45402,"journal":{"name":"Tomsk State University Journal","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85435382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficiency coefficient of water supply and removal as an assessment factor of further operation 供水和排水效率系数作为进一步运行的评价因素

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Tomsk State University Journal Pub Date : 2023-06-25 DOI: 10.31675/1607-1859-2023-25-3-162-168

O. Prodous, D. I. Shlyichkov

引用次数: 0

Engineering issues in restoration. Cultural deposit growth effect on preservation of stone churches in Tomsk 修复中的工程问题。托木斯克文化沉积物增长对石教堂保存的影响

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-54-69

A. Kutukov, E. N. Kolokoltseva, L. Romanova

{"title":"Engineering issues in restoration. Cultural deposit growth effect on preservation of stone churches in Tomsk","authors":"A. Kutukov, E. N. Kolokoltseva, L. Romanova","doi":"10.31675/1607-1859-2023-25-3-54-69","DOIUrl":"https://doi.org/10.31675/1607-1859-2023-25-3-54-69","url":null,"abstract":"The article explores the negative impact of the grown cultural deposit on stone monuments of Tomsk and ways of its elimination. The urgency is caused by the continuous and complex influence of the grow cultural deposit on historical buildings.Purpose: The article considers changes in urban development and conditions and new threats of monument preservation and their impact; gives recommendations for the conservation of Tomsk churches and the improvement of their territories.Methodology/approach: The literature review, the analysis of general technical state of stone monuments in view of the ground water influence on them and proposals on this influence elimination. Articles, books and conferences of various authors – archaeologists and architects – given in the references.Research findings: Recommendations are given to eliminate the negative impact of the increased cultural deposit, including the territory planning, replacement of coatings, installation of dewatering electro-osmotic devices, impervious curtains, hydrophobization of foundations, restoration of waterproofing and backsplash in compliance with specifications. The importance of informing the population about consequences of uncontrolled cultural deposit growth is noted herein.Originality: The analysis of the technical state of stone churches of Tomsk such as Aleksander Nevsky and Peter and Paul; recommendations for eliminating the negative impact of the increased cultural deposit growth.","PeriodicalId":45402,"journal":{"name":"Tomsk State University Journal","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84003777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation between residential area, service facilities, research and production zone of Russian science cities 俄罗斯科学城的居住区、服务设施、研究和生产区之间的相关性

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-70-80

E. D. Malova

引用次数: 0

Calculation of cylindrical mesh coatings based on equations of motion 基于运动方程的圆柱网格涂层计算

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-112-119

A. Siyanov, D. K. Yaroshevich

引用次数: 0

Free vibrations of rectangular plates 矩形板的自由振动

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-96-111

N. A. Morozov, G. Grebenyuk, V. Maksak, A. F. Gavrilov

引用次数: 3

Graph-analytic models and space syntax tools for planning structure characterization 规划结构表征的图形分析模型和空间语法工具

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-39-53

D. S. Tseluiko, A. Kirpo

{"title":"Graph-analytic models and space syntax tools for planning structure characterization","authors":"D. S. Tseluiko, A. Kirpo","doi":"10.31675/1607-1859-2023-25-3-39-53","DOIUrl":"https://doi.org/10.31675/1607-1859-2023-25-3-39-53","url":null,"abstract":"Purpose: The aim of the work is to identify the similarity and difference between three layouts created by the same technical specifications in order to study the design parameters, which may be inaccessible to the designer without the syntactic analysis.Methodology/approach: Different approaches are considered in relation to space as an integral structure. Entropy and integration are used for the syntactic analysis, and j-graph is used for the stepwise depth analysis. Investigated are different works, and the precise mathematical tools for the analysis of the planning structure are chosen. The paper proposes the criteria evaluation of the effectiveness of each planning structure. A graph-analytic model is created.Research findings: The method of parsing is explained in detail, with the selection of tools and spatial values that are appropriate for the objects in question. Criteria and conditions for evaluating the planning structure effectiveness are described. A further vector of work is outlined and the potential of syntactic analysis as a method of pre-project evaluation of work is shown.Originality: The paper proposes the criteria evaluation of the planning structure effectiveness. A graph-analytic model is created. ","PeriodicalId":45402,"journal":{"name":"Tomsk State University Journal","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76512237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Classicism in Tyumen wooden architecture late in the 19th and early 20th centuries. Field research 19世纪末20世纪初秋明木结构建筑的古典主义风格。实地研究

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Tomsk State University Journal Pub Date : 2023-06-24 DOI: 10.31675/1607-1859-2023-25-3-81-95

V. V. Yugai, E. V. Sitnikova

引用次数: 0