Engineering Surveys Research Articles

The technology of restoration of the red brick facade on the example of an object of cultural heritage of regional significance “Mansion of the Philistine Galaktionov G.I.”

The article provides brief historical and archival information about the object of cultural heritage of regional significance “Mansion of the philistine Galaktionov G.I.”. A description of the decorative solution of the facades of the building, information about its spatial planning solution is given. The emphasis is placed on an unusual design solution of the main facade of the building – the vertical log cabin is lined with brickwork. Some results of complex engineering surveys are presented, from which it can be seen that the preserved structures of the building are in disrepair, there is a large percentage of masonry losses along the facades. However, it is still possible to preserve the original facing layer of the masonry of the main facade and technological solutions for its restoration are given. The description of the measures after the work on the preservation of the red brick facade is given. An assertion is made about the individuality of the developed technology, since each object of cultural heritage is unique from the point of view of the degree of preservation of structures.

Geotechnical engineering surveys and soil testing in the construction of buildings and structures

The article suggests a way to increase the efficiency of geotechnical engineering surveys through the rational use of fast approximate methods of soil testing (“express methods”). Such tests are recommended to be carried out in large volume and considered as a means of assessing the geotechnical structure of the site as a whole. In this paper, these issues are considered by the example of determining the bearing capacity of piles according to static sounding data and static tests of full-scale piles. A mathematical model for assessing the information content of the test complex based on the concepts of information theory is proposed. Calculations based on this model show that the informativeness of a large number of approximate tests may (due to the heterogeneity of the soil) exceed the informativeness of a small number of accurate tests.

A review of approaches to assessment of potential radon hazard of land plots

According to Rosstat statistics, in recent years there has been a tendency in the Russian Federation to increase the intensity of construction, while both the number of buildings put into operation and their total area are increasing. The assessment of the potential radon hazard of land plots for construction provides the possibility of timely inclusion of the necessary protective (preventive) measures against radon in the design of buildings. This is a legal requirement in cases where the density of radon flux from the ground surface within the building area exceeds the established hygienic standards (action levels). The paper presents a review of Russian and foreign approaches to assessing the potential radon hazard of land plots conducted within the framework of engineering and environmental surveys. The current regulatory requirements to radiation safety indicators of land plots for construction of residential, public and industrial buildings and facilities in the Russian Federation are analyzed. The main drawbacks of the algorithm for determining the potential radon hazard of land plots, used in the current guidelines MU 2.6.1.2398-08 approved at the federal level more than 15 years ago, are described. Critical remarks (the unsuitability of the value of density of radon flux from the ground surface for designing radon protective and mitigation (remedial) measures, lack of consideration of seasonal variations of radon flux density, etc.) accumulated over the years as a result of practical application of these guidelines are presented. Benefits and drawbacks of foreign approaches to assessing the potential radon hazard of the territory based on the results of measurements of radon concentration in soil gas, as well as the very possibility of a transition in Russian regulations from the density of radon flux from the ground surface to the radon concentration in soil gas, are analyzed. Some rational proposals of various Russian research teams on improving the algorithm for determining the potential radon hazard of land plots are considered.

Analytic Rubrics for the Practical Assessment of Students’ Performances in Engineering Survey Course

The use of analytic rubrics as an assessment tool has been an integral component of education. In Surveying courses, it is essential to evaluate the psychomotor skills under simulated conditions of actual practise. The main objective of this study is to determine the comparative and efficacy of practical assessment conducted at the diploma and degree levels in the Civil Engineering programme. In order to achieve the objective, implementing rubrics in the continuous assessment of the Surveying courses to facilitate a profound comprehension of physics, mathematics, and engineering principles needs to be executed. Previously, a practical assessment has been conducted in a traditional method which gauges the student performance according to the time records during certain practical tasks given resulting in inadequate assessment tools that failed to capture the psychomotor component of practical assessments effectively. As for methodology, a comparative analysis was conducted to examine the consistency and usefulness of analytic rubrics in assessing the course and program outcomes of Surveying courses at both diploma and degree levels. The analysis aimed to determine the impact of these rubrics on student performance. This comparison should be conducted in order to prevent redundant actions, as it pertains to diploma level students who will be integrated into the degree program. This assessment reveals that most students met all performance criteria at an acceptable level. This indicates that the analytical rubric used for the Practical Test in Surveying courses is adequate and effective as a grading instrument. As for the results, the comprehensive analysis indicates that a significant majority, ranging from 75% to 81%, exhibited commendable performance in achieving the criteria for various Programme Outcomes (PO), particularly in PO4, PO5, PO9, and PO10.

ЭКОЛОГИЧЕСКИЕ ОСНОВЫ ВЫБОРА БЕРЕГОУКРЕПИТЕЛЬНЫХ СООРУЖЕНИЙ ПРИ РЕКОНСТРУКЦИИ ПЛЯЖЕЙ КРЫМСКОГО ПОБЕРЕЖЬЯ

The relevance of improving the methods of engineering and environmental survey of coastal protection objects is determined by their existing violations, which reduce environmental safety in general and create a danger for the organization of tourism on the coast. The purpose of the study is to substantiate the choice of bank protection structures during the reconstruction of the beaches of the Crimean coast in the conditions of recreational specialization of the region. The nature and extent of deformations of the coastal zone of the sea and shore protection structures on the coast of the Kalamitsky Bay of the Black Sea are described. The authors proposed the design and location of the breakwater, which will make it possible to more effectively cope with the damping of waves during a storm period compared to classical breakwaters. Materials and methods. The study of the state of coastal territories and the solution of problems of coastal protection structures is based on the theory of geomorphology of the surface and underwater parts of the coast, the regularities of the hydrophysical parameters of the sea in the coastal zone, and climatic and seismic conditions. The methods of field observations and experimental studies in the wave basin were used to take into account the influence of natural and anthropogenic factors on the ecological parameters of the coastal zone of the Crimean coast. Results. In 2022, a team of authors carried out a visual survey of the coast in the territory of the Bakhchisaray district of the Republic of Crimea with a total length of 11.5 km. from s. Coastal to with. Angular. As a result of the inspection, sections of the coast that are potentially dangerous to the health and life of people and are not suitable for normal use for recreational purposes were identified. Conclusions. Long-term field observations show that the creation of bank protection in certain local areas, having given only a temporary positive effect for these areas, can have a very negative impact on neighboring and even remote areas; that is why the issue of protecting the coast should be resolved at least on the scale of the coast of settlements, taking into account the conditions of a single system. The shape of the coast protection structure proposed by the authors can make it possible to more effectively dampen waves compared to classical rectangular breakwaters. However, when designing coastal protection measures, it should be taken into account that separate protection of small areas of eroded coastal territories within a large zone of eroded coast is ineffective, since adjacent unprotected shores will recede under the influence of a system of natural factors.

The Role and Practice of Engineering Survey Skills Competitions in Cultivating Craftsmen in Chengdu

The Role and Practice of Engineering Survey Skills Competitions in Cultivating Craftsmen in Chengdu

Changes in high school students attitudes toward health sciences following a hands-on outreach STEM program.

Despite attempts to diversify healthcare workplaces and education, racial and ethnic minorities (REM) remain underrepresented in these fields. This study investigated changes in high school students' health science interest following a single exposure, hands-on anatomy laboratory visit. One hundred and eighty-eight high school students participated in a single day, one-hour visit to a human anatomy laboratory on a university campus. Participants engaged in hands-on activities centered around both human and animal specimens led by university mentors. Using a modified Science Technology Engineering and Mathematics-Career Interest Survey (STEM-CIS) questionnaire, health science STEM interest was calculated before and after the visits and compared using a paired t-test (α = 0.05). A 2 × 2 ANOVA (α = 0.05) was run on pre-to-post-visit interest score differences with factors of Race (White/REM) and Gender (Male/Female) to determine if race/ethnicity and/or gender moderated the gains observed. Overall, health science STEM interest increased significantly from pre- to post-visit (p < 0.001), and these gains were greater in REM students (p < 0.05) but did not differ as a function of gender. These findings indicate that a single visit to an anatomy laboratory with hands-on activities can be used as a tool to engage high school aged students in STEM and may be particularly beneficial for racial/ethnic minority students, potentially influencing health science STEM interest.

Meteorological regime of the Elbrus high-mountain zone during the accumulation period

Unique automated meteorological observations were carried out on the southern slope of Elbrus, near Pastukhov Rocks, at 4700 m a.s.l., during the 2021–2022 accumulation season. Data were obtained on air temperature, humidity, wind speed and direction, snowdrift and radiation fluxes with a temporal resolution of 1 minute or less. Analysis of the data series showed that the representative winter air temperature at this altitude on the southern slope of Elbrus is –10 °С, and the minimum is –36.4 °С; the partial pressure of water vapor does not exceed 3.5 hPa. At the same time, the average daily maximum of wind speed amounted 13.1 m s–1 with the absolute maximum of 54.1 m/s. Snowstorms with a snow transport intensity of more 0.1 kg/m2s–1 are quite common phenomenon in winter, while the maximum average value of the transport reaches 0.87 kg/m2s–1. An empirical relationship was established between the average hourly wind speed and the maximum gust speed for the same period, and it was shown that for these conditions the wind gust exceeds the average hourly wind speed by 1.8 times, while the representative value of the standard deviation of wind speed is 5.8 m s–1. This information may be useful not only for the glaciologic problems and modeling, but also for construction and engineering surveys, which are relevant in view of the present-day active development of the mountain ski infrastructure on the southern macro-slope of the Elbrus. In addition, the obtained series of instrumental observations were used to assess the quality of reanalysis data for high mountain regions taking as an example the ERA5. The ERA5 reanalysis was demonstrated to reproduce rather successfully the air temperature, wind speed and humidity in high mountain conditions, but extreme values for all these parameters are underestimated. Thus, the minimum temperature in winter turned out to be overestimated by 2 °C, and the maximum was underestimated by 4 °C, while the wind speed, according to the ERA5 reanalysis, never exceeded 40 m/s during the above observation period. It is also shown that the FlowCapt4 acoustic blizzard gauge (driftometer) can be used to estimate average wind speeds since it is less sensitive to severe high-altitude conditions compared to acoustic and cup anemometers.

Engineering geophysical investigations using electrical resistivity tomography for groundwater exploration in the Bodaibo district of the Irkutsk region

Relevance. The need in technical groundwater exploration to construct a groundwater well for water supply of the rotation village of the mining and processing plant "Svetlovsky" in the Bodaibo district of the Irkutsk region. The electrical resistivity tomography is a common method for studying the upper part of a cross section and is widely used in mineral prospecting, geological mapping, engineering surveys, hydrological and environmental studies. The application of electrical resistivity tomography in these conditions will allow substantiating the location of hydrogeological wells and boreholes. Aim. Assessment of the geological and hydrogeological conditions of the area of work for the prospect of extracting groundwater for technical water supply for the needs of the rotational camp. Objects. Bedrocks, which are characterized by high resistance values and are aquicludes; permeable low-resistance zones that are water-bearing rocks. Methods. Ground-based geophysical surveys using electrical resistivity tomography; two-dimensional inversion of ERT data and their interpretation taking into account engineering and geological data of drilling and the GIS complex. As a result of the engineering and hydrogeological surveys performed using ground-based geophysical surveys by electrical resistivity tomography, it was established that the aquifer system of fissured rocks of the Imnyakh suite of the Proterozoic sediment complex (PR2-3im) is represented by fissured limestones of various colours from grey to blueish, with bands of mica schist. Analysis of the study results showed that the thickness of the exposed sediments is up to 50 m, the groundwater level of the operating horizon is opened at depths from 21 to 28 m. They are covered with a complex of low-permeability sediments of thickness from 5 to 11 m that are presented by interbedding of dense grey limestones and black metasandstones.

Evaluating the Positional Stability Status of the Druk Corsnet: A Preliminary Study

Abstract— The continuously operating reference station (CORS) that provides a Global Navigation Satellite System (GNSS) enables precise location and height data for various applications such as site selection of important engineering projects and constructions and hazard analysis. Similarly, the most common applications of the CORS network, in Bhutan, are for engineering, cadastral, geodetic, and topographical surveys. In this regard, the consistency and dependability of the data from the CORS station are crucial. Moreover, the ability of such applications heavily depends on precise and reliable data from the CORS network. However, Bhutan has not conducted any studies on the stability, in terms of its position, and height fluctuation of the CORS station. Therefore, the goal of this study is to determine the positional and height variation of the 9 CORS stations that are operational in Bhutan between the years 2016 to 2022. Assessing the stability and dynamic behavior of reference stations in a CORS network is part of position variation analysis. It is feasible to identify and quantify a variety of geodetic occurrences by examining the time series of positional analysis. Analysis of height variation focuses on changes in orthometric heights throughout the CORS network. In our study, all the available GNSS CORS data are processed and the displacement in height and position is computed and compared. The analysis consists of a simple method (mean value subtraction) of time series data, which is computed and compared. The major findings show that the absolute mean standard deviation in the position of the stations was 5.49 cm, 6.36 cm, and 4.24 cm vertical (height), ease, and north horizontal component respectively. The findings highlight that the proposed method of determining the variation in height and location of the CORS stations is fairly practical and will help the user community to guide them in using the CORS network across Bhutan wisely. Similarly, the result of this study will be a relevant source of information to organizations such as the National Land Commission Secretariat (NLCS) as a means to augment the system in the future.

Exploration of the Application of UAV Remote Sensing Technology in Engineering Surveying and Mapping

Exploration of the Application of UAV Remote Sensing Technology in Engineering Surveying and Mapping

NUMERICAL SIMULATION OF THE SPATIAL MODEL OF THE DAMAGED NINE-STORY BUILDING FOR STRENGTH AND RIGIDITY ASSESSMENT BASED ON SURVEY RESULTS

The paper presents the main ideas and possibilities of creating a complex spatial numerical model, research and analysis of the stress-strain state, strength and stiffness of a damaged nine-story building with the help of our own software, using the modified method of straight lines, and the calculation software complex LIRA from the action of a complex load based on the results of an engineering survey by experimental methods. The created complex model of the building based on BIM technologies is used for further adoption of optimal project decisions and significantly accelerates project work. The results of a numerical study of a complex spatial model and conclusions about the strength characteristics of structures and the building as a whole significantly expand the possibilities in making project decisions and creating promising developments based on them.

Numerical modelling of temperature effects on the overpass to create a spatial computer model of reconstruction

Numerical modelling of temperature effects on the reinforced concrete overpass No. 11a of PJSC "Azovstal Ironand Steel Works" in Mariupol was carried out to assess the technical condition of building structures, identify possible defects affecting the strength and bearing capacity of the structure, load capacity and residual life, along with engineering surveys using instrumental methods, to develop a project for the overpass overhaul. A comprehensive methodology for studying the stress-strain state, strength and stiffness of structures was created and a calculations of tware package based on the semi-analytical modified straight line method was developed, which works along side the LIRA and SCAD calculations of tware packages and provides accurate and objective results. Based on the results of the study, the concept of the overpass reconstruction was adopted on the basis of the created spatial computer models and a project for the overpass overhaul was developed.

Mobile learning supported science teaching application: Electric charges and electric energy

AbstractThe aim of this study is to examine the effect of mobile learning supported science teaching on eighth grade students' Science, Technology, Engineering and Mathematics fields and Information Technologies Self-Efficacy and to determine students' views on this process. For this purpose, a quasi-experimental design with pre-test post-test control group was used in the study. The study group consisted of a total of 45 students, 25 in the experimental group where the mobile learning supported 5E learning model was applied and 20 in the control group where the 5E learning model was applied. The applications in the experimental and control groups took place in a total of four weeks. Science, Technology, Engineering and Mathematics Career Interest Survey, Information and Communication Technologies Self-Efficacy Perception Scale and semi-structured interview form were used as data collection tools in the study. As a result of the analysis of the data obtained; it was determined that mobile-assisted science teaching had a positive effect on eighth grade students' STEM interests and self-efficacy levels. In addition, students stated that mobile-assisted science teaching increased the retention of knowledge, facilitated understanding of the lesson, and was instructive and fun. Depending on the results obtained from the research, it was suggested that mobile assisted science teaching should be used in different units of the Science course in order to see the effect of mobile assisted science teaching on different variables more clearly.

Мониторинг почв в районе предприятий по утилизации опасных промышленных отходов

The article provides proposals for organizing and conducting soil monitoring in the vicinity of the enterprise for recycling waste of I and II hazard class. Ecotechnopark “Mirny” is organized in the Kirov region on the basis of the former chemical weapons destruction facility. We propose a list of indicators, controlled in soils, based on information on the composition of emissions, requirements of regulatory documents, results of engineering and environmental surveys and environmental impact assessments. A soil monitoring network was recommended, including 14 sites located in different biocenoses in accordance with the wind rose and terrain features, which is coordinated with the air and vegetation monitoring network. The developed monitoring regulations provide for different frequency of soil sampling and analysis for various indicators depending on the technological process, composition of emissions at each stage, and provides for soil survey immediately before the start of operation of the facility. This survey will allow us to assess the natural-anthropogenic background and subsequently assess the level of environmental impact by accumulative trend in the content of pollutants. This approach seems relevant in a high soil cover complexity, remoteness of protected areas, construction of the object on previously developed territories, and contradictory and incomplete information about the regional background. Annually soil sampling from the upper layers of soil seems advisable. If contamination of the upper horizon is detected, soil samples from the underlying layers should be analyzed to determine the depth of contamination. It is especially important when groundwater is close to the ground.

Background noise and reverberation time in a college classroom

A sound survey of noise levels in unoccupied classrooms on the Marietta Campus of Kennesaw State University identified one classroom as the most problematic in terms of background noise levels. This level is mostly associated with heating, ventilation, and air-conditioning equipment. Excessive background noise in learning spaces diminishes the speech intelligibility from the speaker to the listeners and can cause stress and fatigue. The overall A-weighted average sound levels are compared with ANSI-ASA S12.60-2010/Part 1 (Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools). In addition, frequency analysis of the background sound and time variations are studies. Binaural headset microphone measurements are compared to the single microphone measurements. Reverberation time is measured using the engineering survey method and compared to the ANSI guidelines.

Consideration of the tail dependence of copula functions in the selection of combinations of natural hazards

In accordance with the Federal rules and regulations of the Russian Federation (paragraphs 2.8, 2.9 of RR-064-17) and international standards (IAEA SSG-3), the OUAE (the object of the use of atomic energy) project should provide information on interrelated processes, phenomena and factors of natural origin identified during engineering surveys and studies, and the parameters of relevant combinations of external hazards are determined, for which an analysis of their impact on the safety of the NPP as part of the NPP design and beyond-design accidents should be performed. Combinations of hazards can have a stronger impact on the safety of the station than each impact considered separately, and the frequency of occurrence of the combination can be comparable to the frequency of occurrence of individual impacts. Currently, probabilistic approaches are not presented in the regulatory documents of the Russian Federation and international norms. The paper [1] presents a methodology based on the theory of copula functions, the practice of which has shown that the determination of the frequency and intensity of combinations is influenced by taking into account the empirical parameters of the distribution function: correlation coefficients, tail dependencies. The analysis of the effect of taking into account the value of tail dependencies on the result of choosing a model copula function within the selection of combinations of external natural factors that should be taken into account in the project of the OUAE is carried out. It is shown that the approach presented in [1] needs to be supplemented with an estimate of the value of the upper tail dependence based on statistical data, since due to a more complete application of the properties of copula functions, the depth of justification of the results increases.

Engineering and environmental surveys of a multifunctional complex of buildings and structures subject to reconstruction

Moscow is the largest metropolis in Russia, therefore environmental problems on its territory are becoming increasingly acute (the increase in the number of vehicles, industrial enterprises and the construction of new facilities has a negative impact on the environmental situation in the city), which requires high-quality engineering and environmental surveys. Engineering and environmental surveys make it possible to assess the impact of the reconstruction of the complex on the environment, identify possible risks and take measures to prevent them. They allow considering factors such as the conservation of natural resources, limiting emissions of harmful substances and other environmental aspects. Conducting engineering and environmental surveys is important for reducing negative impacts on the environment and preserving natural resources. This is especially true in the context of growing environmental problems in the city and increasing control over their solutions by the authorities. The purpose of conducting engineering and environmental surveys of a multifunctional complex of buildings and structures subject to reconstruction is to identify recommendations and proposals aimed at reducing and preventing possible negative consequences on the environment.

Structural and technological solutions for engineering and geological surveys, design and operation of buildings and structures on clay soils

The paper offers design and technological solutions and recommendations for engineering and geological surveys, as well as the design and operation of buildings and structures on clay soils in Stavropol. The existing experience of construction in engineering and geological conditions of specific soils and associated hazardous engineering and geological processes that influence the choice of engineering protection methods for new construction and reconstruction of existing buildings and structures has been studied. Clay soils in the city are characterized by swelling and shrinkage due to seasonal fluctuations in humidity in the upper part of the aeration zone, including in the flat areas of the city, and landslide processes on the slopes. When designing foundations for areas with swelling soils, it is crucial to consider the soil's ability to expand in volume as the humidity increases, known as swelling. In swelling soils, when the humidity decreases, the soil undergoes shrinkage. The paper also provides recommendations for water protection measures during the preparation of foundations for new construction. These measures primarily focus on addressing soil swelling rather than shrinkage. Structural and technological measures are presented to increase the rigidity and strength of buildings by dividing them into separate compartments with sedimentary seams, and introducing reinforced concrete continuous belts at several levels of the building.

Статистические характеристики данных температурного мониторинга грунтовых оснований фундаментов зданий города Салехарда за 2018–2023 годы как основа для автоматизации процесса первичной обработки данных

The Arctic today is a dynamically developing territory where the construction and operation of infrastructure are complicated by the presence of permafrost. Climatic changes and anthropogenic factors have a negative impact on their condition. In this regard, studies of the current and forecast state of permafrost in natural and anthropogenic conditions are relevant, which is necessary for the formation of plans for adaptation to climate change, design and engineering surveys work, and risk ma­nagement. Monitoring the temperature regime of soils at the base of the existing infrastructure seems to be the most obvious solution for monitoring the state of permafrost. The object of the study is the soil foundation of buildings erected on permafrost. The subject of the study is data obtained using an automated soil temperature control system for the foundations of capital construction facilities in Salekhard. For the purpose of identifying negative changes in the bearing capacity of permafrost at early stages, the task of determining a set of criteria based on the analysis of temperature monitoring data and their statistical characteristics is solved. In Salekhard wells were drilled at the base of 30 buildings to the depth of the foundation, where thermometric equipment was installed. The sensors measure the soil temperature every 3 hours and transmit it to the server for analysis. As a result, the possibility of using the amplitude of annual fluctuations in the temperature of the soil base and the capacity of the seasonal melt layer under the building to assess the effectiveness of the soil thermal stabilization system is shown. By analyzing the average and maximum temperature values in the bases of objects, it is possible to identify objects with weakened zones. A set of criteria is given for identifying objects with negative changes in the frozen base, and statistical characteristics can serve as a basis for automating the process of processing monitoring data. The information obtained on the parameters of permafrost under buildings will allow us to determine the current state of the soil foundations and predict the development of the situation in order to prevent the destruction of infrastructure.