Destructuring settlements due to frost heave during the structures’ exploitation are often not taken into account at the designing stage, although they are indirectly related to the bearing capacity of the soils. The objective of this research was analyzing the effect of the number of freezing-thawing cycles on the strength characteristics of soils. A paired experiment with various initial parameters (void ratio, initial moisture content, and the number of freezing-thawing cycles) was carried out. According to the experimental results, the cohesion largely depends on the above parameters which might lead to its decrease by up to three times. The angle of internal friction demonstrated an indefinite behavior during the freeze-thaw cycles, which is confirmed by a literature review. Freezing–thawing cycles significantly decrease the soil bearing capacity: up to 44% after 10 freezing-thawing cycles for soil with $e=0.55$ and $w=16.5\%$. However, in the case of $e=0.75$ and $w=22.6\%,$ it increased by 33%. A program based on the least-squares method was used to calculate the approximation coefficients of the dependence describing the changes in strength characteristics from the abovementioned parameters. Changes in strength characteristics must be taken into account when designing structures, as they can lead to additional settlement or even subsidence of the foundations.

This study compares Kriging and Inverse Distance Weighting (IDW) spatial interpolation methods for estimating intermediate soil properties at a construction site in Astana, Kazakhstan. Using data from eight boreholes, seven engineering geological elements (EGE) were identified and analyzed at 6.5 m and 11.5 m depths. Kriging produced deformation modulus values ranging from -0.29 to 18.99 MPa at 6.5 m and -0.51 to 23.94 MPa at 11.5 m, capturing more spatial variability compared to IDW, which provided ranges of 3.3 to 18.99 MPa and 2.6 to 23.99 MPa, respectively. Kriging’s ability to account for spatial correlations resulted in more accurate predictions, particularly in areas with complex subsurface variability. Meanwhile, IDW offered reliable localized results, effective in more uniform geological conditions. The findings demonstrate that both methods are valuable for geotechnical applications, with the choice depending on data density and site variability.

Developing a fine-grained concrete composition for additive technologies is an important scientific and practical task, since traditional building mixtures are unsuitable for 3D printers, and special solutions are practically absent in mass production. This study aims to develop a composition of fine-grained concrete for additive technologies using local resources and ash and slag waste of the Ust-Kamenogorsk thermal power plant, which contributes to the expansion of the raw material base used in this area. The work was carried out taking into account the analysis of the literature review, which made it possible to identify key aspects and directions in the development of concrete mixtures for additive technologies. This article discusses the possibility of using ash and slag waste in concrete as a filler. Ash has a grain size comparable to river sand, so it can be used as a new material to replace fine filler. To obtain the mixture, 5 experimental mixtures and one reference sample were prepared. The optimal composition is considered to include 30% of M500 Portland cement, 40% of sand, and 30% of ash and slag. The physical and mechanical characteristics of this composition are as follows: the mobility of the mixture is 5.81 cm, and the setting completion time is 4 hours 19 minutes. The results of the sample tests confirmed that the created fine-grained concrete compositions are suitable for extrusion on construction 3D printers. The possibility of creating a composition based on local ash and slag waste for additive technologies used in producing small architectural forms was experimentally confirmed.

This study examines the feasibility of Cured-in-Place Pipe (CIPP) technology for trenchless rehabilitation of aging sewer pipelines, addressing the severe deterioration of Karaganda’s sewer networks. A 3 km section was inspected using CCTV, ultrasonic, and shock-pulse methods to assess pipeline conditions, revealing structural defects with depreciation levels reaching 70-100%. The CIPP method was successfully applied to restore the integrity of 2.6 km pipelines while minimizing excavation, stabilizing the average flow rates and velocity of 0.8-1.2 m pipelines at 710 liter/s and 1.2 m/s, respectively. Hydraulic analysis confirmed that rehabilitated pipelines maintained sufficient flow velocity for self-cleaning and increased capacity, reducing blockage risks. The findings demonstrate that CIPP is a sustainable alternative to pipeline replacement, offering a viable solution for long-length sewer rehabilitation and supporting strategic urban infrastructure renewal.

This study presents the results of engineering and geological surveys conducted at an industrial facility in the northern region of Kazakhstan. The hydrogeological conditions of the site were analyzed, and field investigations were carried out to determine the physical and mechanical properties of the soil. The surveys were conducted in accordance with the requirements of current regulatory documents in the Republic of Kazakhstan. Engineering-geological investigations were performed to provide a comprehensive assessment of the site conditions, taking into account the characteristics of the planned facilities. The ranges of deformation modulus for various soil types were evaluated using plate load tests. Particular attention was given to the advantages of this approach, including the preservation of structural integrity, minimizing the impact on existing structures, and the use of strong and durable materials. Examples of successful application in industrial facilities are presented to demonstrate the practical significance of the methods. The importance of advanced engineering solutions for reducing soil deformation is emphasized. The study focuses on the analysis of soil layers and groundwater levels. Field results indicate a significant reduction in soil deformation, which enhances both the stability and the service life of industrial buildings and structures. Overall, engineering and geotechnical testing represent a promising component of modern industrial design, requiring an interdisciplinary approach that considers engineering, geological, and economic factors.