Drainage Construction Research Articles

Impact of Urban Flood Management on the Values of Properties in Ibadan, Oyo State

This study investigated the impact of the Ibadan Urban Flood Management Project (IUFMP) on property values in 17 priority project sites across Ibadan, Oyo State, Nigeria. Urban flooding has been a long-standing challenge in Ibadan, causing substantial damage to property and infrastructure, particularly in flood-prone areas, which has led to declining property values. In response to the 2011 floods, the Oyo State government, with World Bank support, initiated the IUFMP to mitigate flood risks through drainage construction, river channelization, and early warning systems. A survey research design was used, combining both quantitative and qualitative data collection methods. Primary data was gathered from 383 respondents, including homeowners, tenants, estate surveyors, and key project officials. Quantitative data were analyzed using descriptive and inferential statistics, while key informant interviews provided insights into project sustainability and management. The study found that 54.8% of respondents strongly disagreed that the IUFMP led to an increase in capital property values, with a mean score of 1.82, and 53% strongly disagreed that rental values increased, with a mean score of 1.89. Furthermore, 66.8% of respondents disagreed that property purchases had increased (mean: 1.48), and 74.4% disagreed that the filthiness in the areas had reduced (mean: 1.26). Thematic insights from key informant interviews revealed positive project outcomes, including improved flood resilience and enhanced livelihoods. However, significant challenges in fostering community engagement and ensuring sustainable environmental benefits were identified. The study concludes that while the IUFMP has successfully reduced flooding and improved infrastructure, its impact on property value appreciation remains limited. It recommends sustainable strategies, including enhanced community involvement, to maximize the long-term benefits of the project.

HYDROPHYSICAL PROPERTIES OF HEAVY-DUTY CONCRETE WITH A COMPLEX MODIFIER FOR HYDROMELIORATIVE CONSTRUCTION

Heavy concrete is widely used as the main structural material in irrigation and drainage construction, ensuring high reliability and safety of the complexes during operation. The main quality criteria for heavy concrete are their operational characteristics. The binder was Portland cement of class CEM I 42.5N. The dispersed composition, technological and strength characteristics of cement and cement stone obtained from it were determined using sieve analysis, pycnometric method, determination of bending and compressive strength in accordance with standard methods. Natural sand was used as a fine aggregate. Granite crushed stone was used as a coarse aggregate. Water was used to mix the concrete mixture. Melflux 5581 F superplasticizer was used as a plasticizing additive. Microsilica was used as an active mineral additive. Chopped basalt fiber was chosen for dispersed reinforcement of concrete stone. To determine the efficiency of water interaction with the matrix of the developed concrete and, as a consequence, the efficiency of diffusion processes inside the matrix, affecting the destruction of the concrete stone structure and possible moisture loss during irrigation, the porosity of concrete, its water absorption and water resistance were determined. Analysis of the obtained data shows that the introduction of a complex modifier together with basalt fiber reduced the water absorption index by 57.8% compared to the control. The water resistance of the modified concrete in composition 5 increased by 4 loading stages compared to control composition 1. Improvement of hydrophysical properties of modified concrete was established: water absorption decreased by 57.8%; water resistance grade increased by 4 loading stages in comparison with the control composition. After 600 cycles of frost resistance testing, the mass loss was 1.5-1.8%, the strength decrease was 9.1%-10.2%. The proposed modification with a complex additive together with basalt fiber allows obtaining high-quality heavy concrete with improved hydrophysical properties.

Environmental Health Risk Assessment in Tabing Banda Gadang Subdistrict, Padang City

Sanitation problems in Indonesia still involve deviant social behavior, namely defecation habits anywhere. According to World Health Organization, around 2.5 billion people worldwide do not have access to proper sanitation facilities. Indonesia itself is ranked second after India, with a high number of people still defecating in the open; this is due to people's habits, which are very difficult to change because they have been inherited. The use of surface water sources, namely river water, with physical water quality that does not meet requirements, the absence of facilities for wastewater disposal, and the absence of household waste management can cause health hazards to the environment. The research aims to know the risky health environment in the sub-district Tabing Banda Gadang, Padang City. Study method This Quantitative nature descriptive analytic with approach Studies Evaluation Risk Health Environment is a participatory study to understand the condition of sanitation and hygiene facilities and community behaviors at the household scale, the results of data processing and analysis that can describe the determination of risk areas from each region to the village/sub-district level. The results of the study found that the risk areas were Water Sources with results of Not enough risk (value 28), Domestic Wastewater with Medium risk (value 68), Medium Risk Waste (value 51), high risk of waterlogging (value 58) and Clean and Healthy Living Behavior is not enough risky (value 32) it can be concluded that the sanitation risk index of Tabing Banda Gadang Village is included in the Current Risk with a value of 237. Tabing Banda Gadang Village is at high risk of waterlogging, so it is recommended that the Village facilitate the construction of drainage by coordinating with the Department of Housing and Public Works to resolve the waterlogging problem.

Planning municipal drainage infrastructure maintenance operations with finite available crews: pragmatic optimization approach

This paper proposes a streamlined approach to addressing the problem of allocating finite crew resources to concurrent jobs in the context of municipal drainage infrastructure maintenance. The problem was defined from the perspective of a project manager involved in planning such operations on a day-by-day basis. The problem statement was then transformed into a simplified Integer Linear Programming optimization model. Performance metrics were devised to evaluate the optimization model’s effectiveness. A heuristic algorithm representing the decision-making process by a seasoned planner in the partner company was also developed. Both methods were applied to a case study and contrasted based on the same performance metrics. The findings underscored substantial optimization benefits in rendering decision support in resource-constrained drainage construction operations planning. In conclusion, this research presents an alternative strategy for navigating the complexities inherent in finite crew resource allocation on multiple concurrent drainage projects; lends a cost-effective optimization solution to improving the utilization of finite available crews while satisfying service demands from multiple clients to the largest extent possible.

A new perspective to understand public response to the Typhoon Doksuri from coastal and inland regions

Massive amounts of data from social media possess the potential to rapidly identify the primary issues of concern in emergency disaster management. In summer 2023, Super Typhoon Doksuri which was an exceptionally special typhoon disaster that caused severe damage to China's coastal areas and disastrous impacts in inland regions, particularly triggered the most severe rainstorm in Beijing area in over a century. To enhance typhoon hazard reduction in both coastal and interior locations, it is crucial to examine public response to these events. This study uses microblog text data from July 27 to August 3 of 2023 to map the public response to Typhoon Doksuri. The Support Vector Machine (SVM) algorithm was used to classify the microblog text in combination with the typhoon path to analyze the spatial and temporal variations of the emotions of the affected individuals. The relationship between changes in public opinion, the distribution of topics, and the major disasters triggered by the residual circulation of Typhoon Doksuri in the Beijing-Tianjin-Hebei region is discussed. The Mentougou mega-storm in Beijing area that occurred in July 2023 is a typical case. The findings demonstrate that during the typhoon event, the focus of public attention changed with the movement of the typhoon path, and various public opinion topics exhibited temporal synchronization. Public sentiment indicates that the overall supportive sentiment is higher than is fearful sentiment. Based on this, it is crucial to strengthen the Beijing-Tianjin-Hebei cooperative emergency response, and response measures were proposed related to urban flood control and drainage construction, public awareness, backward areas, secondary disasters, resident relocation, and social media technology.

Time Optimization Analysis Of Drainage Projects (Case Study: Surya Indah II Complex Drainage Construction)

The rapid development of the world of construction means that competition in the construction services business must be able to compete. Therefore, careful consideration is required to choose a method so that a construction project can run effectively and efficiently with results that meet the objectives, one of which is the Surya Indah II Complex Drainage Construction. In a development project, considerable processing is required, taking into account the increasing size of the project and the complexity of the dependencies between one part of the work and another in a project to achieve the desired results. Proper scheduling along with adequate resource allocation contributes to project success. This is comparable to the Surya Indah II Complex Drainage Development Project in Banjarbaru City, which has a contract value of 1,480,920,041 billion. This project was supposed to be completed in 180 calendar days; however, it was delayed due to a variety of issues, including bad weather, a shortage of labor, and tardy mobilization. According to the data analyzed in this study, the CPM (critical path method) approach has a critical route. The total project period using the CPM approach is 170 days, calculated based on the longest critical route. Work networks studied using the critical path include mobilization work, tree trunk cutting, concrete demolition, asphalt cutting, box culverts, and other tasks. Using the CPM approach, you can cut the job duration by 2.8% of the contract value. The solution to speed up the duration obtained using the CPM method is to add workers, add productivity tools, add working hours to activities that are on the critical path, and add the Earned Value method for optimal results.

Analisis Faktor Keterlambatan Pekerjaan Konstruksi Drainase dengan Menggunakan Metode Kaiser Mayer Oklin (KMO)

This research aims to identify factors that cause delays in implementing the Urban Drainage project in Kepatihan Village, Bojonegoro Regency, using Regional Revenue and Expenditure Budget (APBD) funds. The research method used a population involved in drainage construction, using a saturated sampling technique with 39 respondents. Data collection used questionnaires for primary data and secondary data obtained from project schedules, cost budget plans and workforce data. Data analysis uses factor analysis, descriptive analysis, and cross tabulation analysis. Factor analysis uses the Kaiser Mayer Olkin Measure of Sampling Adequacy (KMO-MSA) method. The KMO test was carried out with a significance value from the Bartlett Sphericity Test of less than 0.05 to determine the suitability of the variables. The KMO-MSA process is carried out by calculating the Kaiser Mayer Olkin (KMO) value. The KMO value ranges between 0 and 1, where a higher value indicates a better match. Apart from that, Bartlett's Test of Sphericity was also carried out to test the significance of the relationship between variables. If the test results are significant (p < 0.05), then these variables are suitable for proceeding to further factor analysis. The results of the cross-tabulation analysis show that the labor variable (X2) is the main factor influencing delays in drainage construction projects, with a significance value (sig) < 0.05. Based on the results of the descriptive analysis, the labor factor indicator (X2) which is the factor that has the most significant influence on construction project delays, is the variable X2.1 in the form of labor availability with a mean of 5.67 and a percentage value of 5.12%. This suggests that a lack of labor can cause delays in project implementation, potentially affecting overall project progress and quality.

Forecasting particle Froude number in non-deposition scenarios within sewer pipes through hybrid machine learning approaches

Sediment deposition has a substantial effect on the hydraulic capacity of channels in urban drainage and sewer systems. In this sense, the self-cleaning concept has been extensively used in the construction of urban drainage and sewer systems. In this regard, the design of the sewer system heavily depends on the accurate forecasting of the particle Froude number (Fr). This study is conducted on experimental data sets collected from existing studies, including a wide range of dimensionless grain size of particles (Dgr), sediment median size (d), hydraulic radius (R), volumetric sediment concentration (Cv), and pipe friction factor (λ) for the condition of clear bed. We forecasted the particle Froude number using four different input combinations. We employed the Random Tree (RT) and Reduced Error Pruning Tree (REPT) methods as standalone methods, as well as Random Committee (RC) and Bagging (BA) methods as hybrid machine learning (ML) methods in particle Froude number forecasting. Hybrid machine learning methods demonstrate enhanced performance compared to both standalone machine learning methods and empirical equations. In the context of sewer system design under non-deposited bed conditions, there is a need to accurately forecast the particle Froude number, RC-RT (IA = 0.96, R = 0.928, MSE = 0.718, RRMSE = 0.197, NSE = 0.86, and PBias = −0.284) performed the best, followed by BA-RT, RC-REPT, BA-REPT, RT, and REPT. In our research, it was found that, in forecasting the particle Froude number under non-deposited bed conditions, Cv emerges as the most responsive input parameter among others.

New insights on the spatial and temporal distribution characteristics of Chinese marine environmental quality and its driving factors from 2003 to 2021

As land and sea integration continues to accelerate, it will inevitably have an effect on the marine ecological environment. However, the study on spatial and temporal distribution characteristics of Chinese marine environmental quality and its driving factors was lacking. This paper employs Regression Analysis, Spearman Correlation Analysis, Canonical Correlation Analysis, Boston Consulting Group Matrix and Environmental Kuznets Curve to examine the spatial–temporal distribution characteristics and correlation factors of Chinese jurisdictional sea areas environmental quality. The environmental quality of the waters under China's jurisdiction improved on average from 2003 to 2021, the area of sea with excellent water quality increased by 7.21 × 104 km2. The spatial distribution showed “South superior, North inferior” trend. The accumulated red tide area is 2.01 × 105 km2, and the green tide has the average maximum area of distribution is 3.13 × 104 km2. The marine dumping area's volume of waste has a three stages of slow rise (2003–2007), steady (2008–2014) and rapid rise (2015–2021). The average percentage of seawater bathing areas with good water quality is 82.10 %. Urban Environmental Infrastructure Investment and Urban Drainage Construction Investments are positively correlated with excellent water quality and negatively correlated with light-sewage water quality. The typical correlation for the group “Environmental Quality/Environmental Governance” is 0.911, and the strongest correlation is between excellent water quality and urban drainage construction investment. The typical correlation coefficient for the “Environmental Quality/Socioeconomic” group is 0.960, and the strongest correlation is between excellent water quality and per capita GDP. The Gross Ocean Product, Per Capita GDP, Proportion of Non-agricultural Industries, Year-end Resident Population, and excellent water quality are positively correlated whereas light-sewage water quality is negatively correlated. Liaoning, Tianjin, Shandong and Guangdong shift from high-pollution-low-investment to low-pollution-low-investment model. Shanghai, Zhejiang, Fujian and Hainan maintain high-pollution-low-investment model, Hainan maintains high-pollution-high-investment model. Jiangsu maintains low-pollution-low-investment model. Hebei and Guangxi shift from low-pollution-low-investment to low-pollution-high-investment model. Liaoning, Hebei, Tianjin, Shandong, Guangxi and Shanghai show inverted “N” shape, Jiangsu shows positive “N” shape, Zhejiang and Fujian show monotonic decline shape, Guangdong and Hainan show positive “U” shape. The results could provide valuable suggestions for coastal provinces to accomplish economic development and environmental improvement, which to prevent the old way of “pollution first and treatment later”.

Investigation of a new reverse drainage construction and the pressure-reducing effect of a tunnel in a water-rich karst location

It is quite simple to create cracking, leaking, and other disasters in the tunnel during operation because water-rich karst tunnels are subject to the action of the high head. If the drainage is not timely, this results in high-pressure water collection around the tunnel lining. The study was conducted depending on Tongzi Tunnel to resolve the issue of water pressure encountered by water-rich karst tunnel lining under high head action and to lessen the issue of operational tunnel illness under long-term water pressure. The mechanical reaction of the number of reverse drainage holes and the size of pipe diameter at the raised arch under various water heads on the tunnel construction was studied using model testing in combination with numerical simulation analysis. It was discovered that using the traditional drainage system would subject the supine arch to extremely high-water pressure, which is often hard to efficiently remove. The major issue causing the elevated arch bulging tragedy is that water pressure in the elevated arch increases as head height increases. High water pressure in the raised arch may be efficiently dealt with using the suggested reverse drainage approach. The pressure reduction rate compared to the traditional drainage method achieved 13.6 % for the investigation of the fractured Tongzi tunnel reverse drainage holes, which had a total of five holes with a diameter of roughly 100 mm. Reverse drainage structures have the potential to save project costs while also realizing “point to point” pressure reduction at the elevation arch of the tunnel and have positive effects on total tunnel pressure reduction. The study's findings can serve as a guide for designing and building comparable water-rich karst tunnel constructions as well as for maintaining drainage systems while they are in use.

Edukasi tentang Sanitasi dan Kesehatan Lingkungan pada Masyarakat Kelurahan Buntusu Kota Makassar

BUNTUSU was originally a village which in 1958 was still part of the Moncongloe Maros district, then in 1961 it became part of the Tamalanrea neighborhood, Biringkanaya District, Ujung Pandang Municipality. The aim of this PKM is to increase partners' knowledge about drainage construction to dispose of dirty household water that is safe for the environment, introduce partners to the tools and materials used to make drainage construction to dispose of household dirty water that is safe for the environment, and improve partners' skills in making construction drainage to dispose of dirty household water that is safe for the environment. The methods used are lectures, discussions and questions and answers, training methods used are demonstrations, discussions and questions and answers. The results of the PKM achieved are as follows. The results of this PKM activity can be described through the role of community social capital as a form of local knowledge, which can be used as a means of socializing the importance of awareness of environmental sanitation. The process of increasing community knowledge in improving environmental sanitation is carried out through three approaches, namely socialization, assistance and planning for making trash cans and making latrines. Partners have knowledge about drainage construction to dispose of household dirty water that is safe for the environment. Partners recognize the tools and materials used to make them. drainage construction to dispose of household dirty water that is safe for the environment, and a drainage construction for the disposal of household dirty water that is safe for the environment has been built in one of the community residences which was built directly.

ASSESSING THE IMPACTS OF FLOOD ON THE COMMUNITIES IN DUTSIN-MA LOCAL GOVERNMENT AREA, KATSINA STATE, NIGERIA

Floods is one of the most disturbing environmental hazards in Dutsin Ma Local Government Area of Katsina State, Nigeria. The resulting effect is on property loss, economy and the environment. On this basis, this research was carried out to evaluate flood risk areas in Dutsin-ma local government area of Katsina State. a questionnaire survey gathered information regarding flood in the research area. geospatial approaches were used to obtain Satellite imagery of 2020 from United States Geological Survey (USGS) Google Earth platform. Multi Criteria Evaluation approach was used to develop flood risk-vulnerability map for the Dutsin-Ma. Findings from this study shows that 19% of the respondents believed that relocating people to higher grounds is the best way to mitigate the impact of flood, about 22.8% of the respondents believed that construction and maintenance of new drainages is a good option. Result for vulnerability assessment shows that Makera South, Makera North, Garhi East, Garhi West, Sakarya, Kitibawa, Gandi and Makwanta are identified as very high-risk areas. Other high-risk areas include Gidan Gamawa, Garin Mallam, Koranwaya, Wawaye, Zaki, Dage, Taka, Korafawa, Unguwan Nassarawa, Gago, Mawashi and Karki. The study recommended that Distribution of adequate relief materials and public enlightenment would assist to reduce the impact of in the study area. Result of this study can be beneficial to relevant professional bodies and agencies such as town planners, land use land cover planners, emergency, and contingency planners and the general public for control and management of flood.

Analisis Dampak Lingkungan Pembangunan Drainase terhadap Aspek Sosial Ekonomi Masyarakat

This study aims to analyze the socio-economic impact of drainage development on Jalan D.I Panjaitan, Sungai Pinang Subdistrict, Samarinda City. This study used a survey method by collecting primary data through questionnaires from 33 respondents affected by the drainage development. The social impact analysis evaluated people's views and responses to the drainage development. Meanwhile, the economic impact analysis involved an assessment of changes in the socioeconomic conditions of the community after the construction of the drainage. The research study showed that the majority of the community perceived their relationship with the development as unfavorable and expressed dissatisfaction with the impacts. A number of respondents also stated that the drainage development had caused social and economic disruptions, such as land acquisition and changes in lifestyle. Some communities experienced a temporary decrease in income during the construction process. Positive impacts identified were flood control, provision of clean water sources, and improved infrastructure in the area. However, there were negative impacts such as environmental damage, social disruption due to land acquisition, and temporary economic impacts for businesses around the project. the construction of drainage on D.I Panjaitan road has a significant impact on the socio-economic aspects of the community. It is therefore recommended that the government and related parties pay attention to the views and needs of the community in decision-making and project implementation needs to be improved, as well as more intensive socialization efforts regarding the benefits and objectives of drainage development.

Discussion on the Application of Pipe Jacking Construction Technology in Municipal Road Drainage Projects

In the construction of municipal road drainage projects, pipe jacking construction is a relatively common construction method. This construction technology can avoid a large amount of excavation work, improve drainage construction efficiency, avoid large-scale damage to the road surface, and exert small traffic impact. Therefore, it is currently widely used in drainage construction, but judging from the current actual application situation, there are still many problems that require further improvement. This article mainly analyzes the advantages of and current technical problems in pipe jacking construction technology in detail, explores corresponding solutions, and lays a foundation for the optimization of municipal road drainage engineering construction.

Planning for Drainage Development in Jakarta's Urban Settlements with The Concept of a Healthy City

The need for land use in Jakarta can be a factor causing the reduced function of infiltration and water flow, resulting in changes and problems in the drainage system. It is suspected that downstream areas such as Jakarta are unable to accommodate excess water, because there may be problems with the channels or drainage system. For this reason, it is necessary to plan a drainage system (drainage network) so that it can function optimally in accordance with Minimum Service Standards (SPM) to accommodate water flow discharge. which is normal, especially during the rainy season and there are high tides so that you don't experience inundation or flooding. This research aims to plan the construction of drainage that is optimal according to standards in Jakarta in order to raise public awareness of the importance of keeping the environment clean, not throwing garbage in the drainage canals and always keeping the drainage canals clean so that they can drain wastewater from settlements, rainwater and puddles smoothly.

The coupling effects of carbon fractions, bacteria, and protists on carbon emissions among various ditch levels in the Lower Yellow River

Inland waters are receiving increasing attention due to their importance in the global carbon cycle. However, the dynamics of CO2 emissions and the related mechanisms from ditches remain unclear. In this study, field sampling and an incubation experiment were conducted to explore the effects and mechanisms, especially the coupling effects between carbon fractions, bacteria, and protists on carbon dynamics of different ditch levels (sublateral ditch, farm ditch, and lateral ditch) and sediment depths (0-20cm, 20-40cm) in the Lower Yellow River. Results indicated that sublateral ditches nearest to farmland had the highest accumulative carbon mineralization (0–20 cm 1.38 g C kg−1; 20–40 cm 0.89 g C kg−1), equivalent to that of farmland, followed by the lateral ditch (0–20 cm 0.84 g C kg−1; 20–40 cm 0.50 g C kg−1) and the farm ditch (0–20 cm 0.67 g C kg−1; 20–40 cm 0.26 g C kg−1). Carbon emissions from ditches are mainly regulated by SOC (36.97 %), bacteria (29.2 %), and protists (18.95 %). Specifically, the mineralization of flooded lateral ditches is attributed to protist diversity. SOC, bacterial and protistan diversity in the farm ditch significantly impacted carbon emissions, with SOC as the dominant factor, while the bacterial composition and SOC contributed more to CO2 emissions in the sublateral ditch. Our results highlight the importance of carbon emissions from ditches, especially those closest to farmland. This study provides new insights into the construction and management of farmland irrigation and drainage in the aspects of carbon sequestration.

Evaluation of land suitability for soybean production using GIS-based multi-criteria approach in Kudan Local Government area of Kaduna State Nigeria

The demand for food production in achieving Sustainable Development Goals, such as poverty eradication and food security and nutrition in developing countries like Nigeria has led to intensive agriculture, resulting in decreased soil quality and environmental challenges. To address these issues, land suitability evaluation plays a crucial role in designing sustainable land use and management systems. This evaluation provides valuable insights for farmers and policymakers to optimize soybean production, enhance crop yield, and promote sustainable agricultural development. The research covers 39,057 ha (ha) and it considers multiple criteria such as soil properties, slope, Normalized Difference Vegetation Index (NDVI), and land use/land cover (LULC) of the study area. Soil data and land use/land cover information were obtained and processed using geostatistical techniques and interpolation methods in ArcGIS. An Analytical Hierarchy Process (AHP) was employed to determine the overall importance of the evaluation criteria. This study revealed that 14.14% of the area falls into the moderately suitable class, a significant proportion (83.77%) of the area is marginally suitable for growing soybean, and the remaining proportion (2.09%) is deemed unsuitable. Drainage condition was identified as one of the major limiting factors for soybean cultivation in the region. Management practices such as drainage construction, organic residue incorporation, and appropriate fertilizer application were suggested to improve land suitability. The outcome of this study has shown that integrating RS and GIS techniques in land suitability assessment facilitates evidence-based decision-making and supports effective land use planning for increased agricultural productivity and environmental sustainability.

Prediction of dynamic liquid level in water-producing shale gas wells based on liquid film model

The accumulation of liquid in shale gas wells will lead to an increase in bottom-hole pressure, and a decrease in production, even the shutdown of gas wells. Accurately predicting the variation of liquid height in shale gas wellbore and the corresponding production is helpful to determine the liquid accumulation status and the development of reasonable drainage construction plans. It can provide theoretical support for the efficient and stable production of shale gas wells. A predictive analysis model of shale gas wellbore liquid accumulation was established based on a liquid film carrying model, which considers the coupling of flow in the reservoir and wellbore in shale gas production system. This model can accurately predict the liquid accumulation height, production rate, and the bottomhole pressure changes in liquid-accumulating gas wells. A comparative analysis was conducted on the effect of wellbore structure on liquid accumulation characteristics in the typical upward-type and downward-type horizontal wells in the W block. In upward-type horizontal wells, the liquid height increases slowly before the liquid accumulation fills the horizontal section, and the liquid height increases rapidly after the liquid accumulation fills the horizontal section. Compared to upward-type horizontal wells, the liquid height rises more quickly and the gas production rate is more sensitive to liquid accumulation in downward-type horizontal wells.

Modified concrete for irrigation and drainage construction

Within the framework of these studies, issues related to the modification of the composition of heavy concrete based on a polydisperse binder with a complex modifier and its influence on the formation of the structure and properties of cement stone, as well as hardened concrete, are considered. The purpose of the study is to substantiate the possibility of obtaining effective heavy concrete for irrigation and drainage construction with improved indicators of operational properties in terms of strength and hydrophysical characteristics. Object of study: heavy concrete based on a polydisperse binder with a complex modifier reinforced with basalt fiber. Subject of study: the structure and properties of heavy concrete based on a polydisperse cement binder with a high packing density together with a complex modifier and reinforced basalt fiber. The influence of the three-level dispersed composition of the clinker component of cement particles on the reduction of interparticle voidness and the increase in the strength of the cement stone was studied. The resulting modified concrete is characterized by an increase in strength to 77.3 MPa, a stretching of 8.62 MPa and a decrease in water absorption to 1.9%; % in comparison with the control composition.

Concrete with a complex additive based on a superplasticizer and an organosilicon polymer

Depending on the functional purpose, different requirements are imposed on the products. In particular, reinforced concrete products used in irrigation and drainage construction, along with increased strength and frost resistance, are required to have increased water resistance. For the water resistance of concrete, through macropores (filter capillaries) are dangerous, which are formed as a result of uneven thermal expansion of concrete components during heat treatment, as a result of plastic shrinkage and sedimentation during compaction. The relationship between the structure and impermeability of concrete is very complex.