Construction Planning Research Articles

Life Cycle Cost Analysis of Connecting Tracks for Expansion of High-Speed Rail Network

New rail lines have been constructed to accommodate the growing demand for high-speed train passengers. In this regard, life cycle cost (LLC) analysis is an essential decision-support tool for evaluating the feasibility of track construction plans for high-speed rail lines. In the construction sequence for connecting tracks, a turnout track can be installed at the connection point between two lines after the existing track has been demolished. The LLC varies depending on the type of track components. Therefore, this study aims to compare and analyze the LCC results of different connecting track scenarios in high-speed rail lines. The total construction cost for designing the existing and new connecting tracks with a concrete track bed was found to be between 484 and 561 million KRW (for turnout No. 18.5–46), which is approximately 230 million KRW higher than that of a gravel track bed. However, the LLC of the ballast track exceeded that of the slab track after seven years of operation. A connecting track comprising a slab and high-speed turnout can reduce the LCC value.

Analysis of the Construction Plan for the Education System Based on Artificial Intelligence

Analysis of the Construction Plan for the Education System Based on Artificial Intelligence

Soil Sharing and Equipment Operations Through Digitalization of Large-Scale Earthworks

The modern construction industry is undergoing considerable changes driven by increased specialization, technological advancements, and growing complexity. The integration of smart construction technology is rapidly advancing as a solution to address the aging workforce in the sector. However, the uncertainty and risks associated with soil construction on job sites remain, leading to increased costs during project execution. Recently, construction sites have sought to enhance productivity by leveraging building information modeling (BIM) and smart construction devices. The adoption of smart equipment, such as machine control and machine guidance, is on the rise in both structural and earthwork projects, with ongoing efforts to mitigate uncertainties. This study proposes a practical approach to reduce the uncertainty in earthworks by optimizing soil sharing strategies and equipment allocation from the initial design phase. A BIM model was developed as a solid structure and then segmented using Dynamo. This model was utilized to create a construction plan using Primavera P6, while AnyLogic (8.9.2) was employed to assess the suitability of equipment combinations, ultimately demonstrating the cost-saving benefits of the proposed approach. Through repeated simulations, work efficiency was enhanced by approximately 6.2% compared to the original 2D planning approach.

Reducing regulatory turbulence for U.S. offshore wind development

With the recent announcement of a joint goal among federal agencies to deploy 30 Gigawatts (GW) of offshore wind capacity by 2030 and the target for the Bureau of Offshore Energy Management (BOEM) to approve the Construction and Operations Plans (COP) of at least 16 offshore wind farms by 2025, the U.S. offshore wind industry appears to be on the cusp of a major expansion. However, a literature review of the history and current state of the U.S. offshore wind industry indicates that resource constraints within the Bureau of Ocean Energy Management (BOEM) and obstacles posed by the complex regulatory process could prevent the industry from reaching its full potential. A critical analysis was conducted on information and data collected from primary and secondary sources to propose strategies for mitigating and avoiding this regulatory turbulence. This paper concludes that BOEM must increase its bandwidth and accelerate the rate of offshore wind project review and approval by pursuing resource augmentation measures and opportunities to introduce efficiencies into its regulatory approach.

Pseudo- World: The Role of Augmented Reality and AI in Construction and Retrofitting

The construction industry is undergoing a revolution with the integration of augmented reality (AR) and artificial intelligence (AI). These technologies are transforming the way construction projects are planned and executed, leading to increased productivity, enhanced design visualization, and more informed decision-making. Our research focuses on developing Pseudo World, a platform that converts 2D house plans into interactive 3D models, allowing for real-time exploration and collaboration through AR. By combining machine learning techniques, pathfinding algorithms, and graph-based models, our approach optimizes spatial planning and retrofitting decisions. This innovative solution enables immersive visualization, enables more effective defect detection and management, and streamlines construction workflows, thereby positioning AR as a driver of innovation in construction planning.

Implementation of BIM Methodology in Calculating Column and Beam Structures for the Main Lecture Building of P4T Empat Lawang Regency

Reliable volume estimation and BOQ are indispensable for streamlined construction planning. Errors and omissions in manual calculations and communication result in cost overruns, delays, and ultimately lead to conflicts and disputes among the parties involved in the project. This process is time-consuming and prone to human error. One way to improve efficiency is to implement Building Information Modeling (BIM) in volume estimation and BOQ calculations to enhance work effectiveness. Autodesk Revit is one software that can assist in 3D modeling and accurate volume calculations. This research discusses how BIM can aid in the process of calculating the volume of structural columns and beams for the Main Lecture Hall in the Integrated Agricultural Research and Development Center (P4T). Compared to conventional methods, the research results indicate that the implementation of BIM in this project has provided significant benefits in terms of efficiency, improved calculation accuracy, material usage, and cost savings. With the optimization of concrete usage in structural columns and beams by approximately 26.92% and reinforcement volume by approximately 13.55%, BIM has proven to provide significant added value to the project.

Reimagining Housing During Reentry: A Process Evaluation of the Village of Hope Transitional Housing Program

ABSTRACT Village of Hope Transitional Housing Program is the first tiny home housing program in the United States for formerly incarcerated individuals. Unlike traditional congregate shelters, Village of Hope provides participants with individual housing units or “tiny homes,” in a neighborhood-like setting with an autonomous living space, amenities, case management, and referrals to services for up to six months. This process evaluation assesses the early implementation of Village of Hope, examining stakeholder planning and collaboration, program construction, and participant needs and perceptions. The study employs qualitative research methods to understand the major hurdles of implementing this housing model and the initial strides in easing reentry challenges for previously incarcerated individuals who would be experiencing homelessness. Findings reveal the achievements and challenges of implementing a tiny home program for the reentry population and are divided into six themes which outline the importance of public buy-in, program construction planning, autonomous housing benefits, service delivery, community engagement, and stakeholder collaboration. This paper concludes with recommendations for future tiny home programs designed for this population.

Sensors for Inflatable Lunar Habitat Construction

Lunar habitat is necessary for human exploration, especially for long duration space missions. For lunar habitat consturction, there are several other environmental hurdles to overcome than earth and constant internal pressure of habitat is added if the structure is to be inflatable.Among these hurdles, high energetic ions and particles from solar radiation and consequence extreme temperature difference may be protected with higher priority at least to secure survival environment for humans.In Korea Institute of Civil engineering and building Technology, new research project was launched in 2023 to design basic plan of lunar habitat construction on the moon and one of research topics is how to secure indoor environment of inflatable lunar habitat under that harsh lunar environment.Multi layred shell structured wall was suggested from previous project and research results and was selected to the optimum initial structure to start. Multi layred shell is mainly consisted of several highly strong and heat resistant fabric such as Kevlar or Vectran in webbing with other ion or particle protective layers and thermal insulation.Key environmental parameters for monitoring are internal air pressure, oxygen cencentration, temperature, humidity, and high energy particles by secondary radiation. Therefore, it is essential how to design and configure total sensing and monitoring system for inflatable habitat for long duration human exploration. Environmental, radiation, and inflatable structure monitoring sensors are summarized and composed to secure indoor enviroment and provide environmental quality data to HVAC system in further.

Using Geodetic Methods in Road Construction Planning: To What Extent Will It Be Effective?

Sustainable development is a well-known concept that is widely applied nowadays. One of the applications of this concept is through an effective planning process, such as road construction planning. Cut and fill volume measurement is an integral part of such a process, which utilizes several geodetic methods. The most commonly used instruments are waterpass and electronic theodolite (total station), but there are significant differences in their concepts. Different observation methods of these two tools can affect their effectiveness. Therefore, in this study, the accuracy and efficiency of waterpass and electronic theodolites were measured and analyzed using the cross-section method to gauge the effectiveness of the ABC road construction project in Sumatra. The results show that although the accuracy of the electronic theodolite is lower than that of waterpass, it might be the preferred method because it saves time and reduces the cost of volume measurement, making it both practical and highly efficient.

Construction of Trusted Electronic Vouchers in Universities Based on PKI Technology

Certification issuance service is one of the high-frequency transactions for college teachers and students in daily work. Implementing the construction of trusted electronic certificates can greatly facilitate the processing of related business for teachers and students, and also accelerate the construction of smart campuses. This article is based on PKI technology, and elaborates on the construction of trusted electronic certificates in universities from three aspects: construction background, construction plan, and construction significance. The construction plan is introduced in detail, and the positive significance of promoting the construction of trusted electronic certificates in universities for teachers, students, and information technology construction is pointed out.

INVESTIGATING THE CONNECTION BETWEEN INVESTMENT INTENTIONS AND LAND STATUS

The subject of investigating the connection between investment intentions and land status is analyzing the main procedures for preparation, approval and implementation of development plans with the objective of changing the purpose designation of agricultural land into urbanized territory. By using a project for a Detailed Development Plans – Plan for Regulation and Construction, an examination is performed of the processes related to the preparation and coordination of the plan, including the change of purpose designation of the agricultural land into land for non-agricultural uses, in accordance with the legislation.

A Prediction Method for Calculating Fracturing Initiation Pressure Considering the Modification of Rock Mechanical Parameters After CO2 Treatment

The establishment of a more realistic CO2 fracturing model serves to elucidate the intricate mechanisms underlying CO2 fracturing transformation. Additionally, it furnishes a foundational framework for devising comprehensive fracturing construction plans. However, current research has neglected to consider the influence of CO2 on rock properties during CO2 fracturing, resulting in an inability to precisely replicate the alterations in the reservoir post-CO2 injection into the formation. This disparity from the actual conditions poses a substantial limitation to the application and advancement of CO2 fracturing technology. This work integrates variations in the physical parameters of rocks after complete contact and reaction with CO2 into the numerical model of crack propagation. This comprehensive approach fully acknowledges the impact of pre-CO2 exposure on the mechanical parameters of reservoir rocks. Consequently, it authentically restores the reservoir state following CO2 injection, ensuring a more accurate representation of the post-fracturing conditions. In comparison with conventional numerical simulation methods, the approach outlined in this paper yields a reduction in the error associated with predicting fracturing pressure by 9.8%.

Analytical solution of surrounding rock stress and plastic zone of rectangular roadway under non-uniform stress field

The shape and extent of the plastic zone can effectively reflect the degree of deformation and failure of the surrounding rock. By applying complex variable functions and the theory of elasticity, a mechanical model for the surrounding rock of a rectangular roadway is established. The analytical solution for the stress in the surrounding rock of a rectangular roadway under a non-uniform stress field is derived, and the spatial stress distribution pattern in the surrounding rock of the rectangular roadway is obtained. Furthermore, using the Mohr-Coulomb criterion, the boundary equation of the plastic zone in the surrounding rock of a rectangular roadway is derived, and the morphological characteristics of the plastic zone are obtained. The results indicate that the plastic zones on both sides of the rectangular roadway are arc-shaped. The asymmetry of the stress environment has a significant impact on the plastic zones in the roof and floor of the rectangular roadway, causing the shape of the plastic zones to resemble a “petal” pattern. The lateral pressure coefficient and the height-to-width ratio have a significant impact on the stress distribution and the morphological characteristics of the plastic zone in the surrounding rock of the rectangular roadway. By validating the computational accuracy of the analytical solution through numerical simulations and conducting an engineering applicability analysis based on a coal mine roadway, it has been demonstrated that the analytical calculation method is both rational and possesses good engineering applicability. This provides reliable theoretical guidance for the design calculations and construction planning of similar roadway projects.

Research on the Current Situation and Sustainable Development Measures for Urban–Rural Water Supply Integration in Yunnan Province, China

Urban–Rural Water supply integration is one of the effective ways to address rural drinking water safety issues. With the rapid economic development and urbanization, the gap between urban and rural water supply has become increasingly evident, and rural areas face severe challenges such as insufficient water sources and substandard water quality. Yunnan Province, due to its unique topography and natural environment, encounters numerous difficulties in promoting the construction and development of urban–rural water supply integration, and there is a severe lack of research specifically focused on sustainable development measures for urban–rural water supply integration in Yunnan Province. In light of this, this paper first reviews the current research status on urban–rural water supply integration both domestically and internationally, pointing out that existing studies mainly focus on optimizing urban water supply systems, addressing rural drinking water safety issues, and exploring water supply management models. It then analyzes the challenges faced by Yunnan Province in advancing urban–rural water supply integration, including limitations in engineering construction, inadequate operation and maintenance, complex and variable water source conditions, and insufficient public awareness of water conservation. In response to these issues, a series of sustainable development measures are proposed, including revitalizing existing assets, enhancing construction planning and quality, promoting water pricing reforms, upgrading the technical system for drinking water safety assurance, and advancing the information technology construction of urban–rural water supply integration, with the aim of providing references and insights for the sustainable development of urban–rural water supply integration in Yunnan Province and other regions.

Knowledge Dissemination and Social Functions: The Multiple Roles of Shanghai Libraries in the late Qing Dynasty and the Republic of China

This study focuses on the multi-dimensional function of Shanghai libraries in academic exchange and social functions from the late Qing Dynasty to the Republic of China. Through the analysis of the social dynamic changes of Shanghai in this historical period, the first thing is to outline the social evolution of the late Qing Dynasty to the Republic of China, and reveal the role of Shanghai as an important city in China. Then, the paper reviews the development of Shanghai Libraries since its establishment in detail, and emphasizes its cornerstone position in the collection, storage and cataloguing of document resources, especially its effectiveness in promoting the popularization of national education and promoting international cultural communication. In addition, the paper further discusses its function as a public place for leisure study, as well as its role in promoting social enlightenment and urban historical and cultural inheritance. By reflecting on the function and limitation of Shanghai Libraries in the historical moment and evaluating it from a fair and impartial perspective, this can provide historical reference for the construction and forward-looking planning of modern libraries. To sum up, Shanghai Libraries plays a key role in the central zone of knowledge circulation. In fact, it is a cultural institution that drives social innovation. In the long river from the late Qing Dynasty to the Republic of China, its historical position is irreplaceable.

Model test study on the mechanical characteristics of shallowly buried covered excavation PBA station construction

The shallowly buried covered excavation PBA method is one of the new construction methods that has attracted widespread attention in the past 20 years. Understanding the deformation of strata and supporting structures is key to ensuring the safe construction of PBA stations at present. Relying on the Beijing Line 12 Beitaipingzhuang PBA subway station and based on the 1:40 model test, the production of similar materials for the model and the station excavation construction plan are introduced. According to the actual construction process of the station, the construction process of the two stations of the pile foundation and strip foundation stations are more realistic. The variations in the strata around the station and the station structure during the whole construction process are obtained. The test results show that the ground displacement of the station is most affected by the excavation of the pilot tunnel, accounting for more than two-thirds of the total displacement, and the ground within the range of 0–12 m around the station is greatly affected by the excavation disturbance during the actual construction process. By analyzing and comparing the ground displacements and the internal forces of the vertical bearing structure of the two types of stations, it is concluded that the pile foundation method is more advantageous for controlling ground displacement and the internal force of the structure. These test results improve design theory of the PBA method and are conducive to further promotion.

CONECTANDO CONCEITOS: O IMPACTO DOS MAPAS MENTAIS DIGITAIS DINÂMICOS NA APRENDIZAGEM DE SISTEMAS LINEARES

Traditional teaching methods tend to emphasize verbal and linear learning, focusing on isolated information rather than identifying relationships between concepts. However, building meaningful understanding requires visualizing these conceptual interconnections. The shift from a linear approach to integrated network models, such as mind maps, facilitates this knowledge organization, allowing students to develop a deeper understanding of concepts. With the advent of distance learning, additional challenges arise in the production of teaching materials, requiring critical reflection on the potentialities and challenges of digital technologies in pedagogical practice. Therefore, this research investigates the effectiveness of using dynamic digital mind maps (DDMM) in learning Electrical Engineering, focusing on the Linear Systems course. The study aims to evaluate, through a data collection instrument, how mind maps can assist students in understanding mathematical and abstract concepts, highlighting two perspectives: how students learn, and their perceptions of meaningful learning based on Digital Educational Resources. The experience emphasized a lesson plan for knowledge construction in the face of the challenges of 21st-century engineering education, developing competencies and skills for solving real and interdisciplinary problems.

Multi-Objective Optimization for Controlling Conflicts in Roadway Surrounding Rock Induced by Floor Stress-Relief Groove

This paper studies the effectiveness of the stress-relief groove on the floor of deep coal roadway and determines the influence of the stress-relief groove parameters on the surrounding rock through qualitative analysis. Based on the displacement conflict problem, evaluation indicators were established, and the optimal solution set was obtained. The innovations of this research include: 1. For geotechnical numerical simulations, novel stress monitoring and plastic zone monitoring techniques have been introduced to accurately reflect the condition of the surrounding rock; 2. The effects of floor relief grooves in deep roadway on surrounding rock have been analyzed, and the advantages and utilities of central and corner relief grooves have been determined; 3. The usability of small datasets has been enhanced by applying SEGA to optimize machine learning models with data augmentation techniques; 4. Multi-objective optimization algorithms have been applied to geotechnical engineering, providing valuable references for decision making. The results demonstrate that multi-objective optimization can significantly enhance the effectiveness of surrounding rock control, resolve conflicts, and achieve more reasonable construction plans. This research provides new theoretical foundations and practical guidance for deep mine roadway-surrounding rock control.

Jurassic Bryozoans of the Family Eleidae (Melicerititida, Stenolaemata)

Additional analysis of the skeletal morphology of bryozoans of the family Eleidae d’Orbigny, 1852 (Melicerititida, Stenolaemata) and three of its species from the Middle Jurassic (Middle Callovian) of the Moscow Region – Elea lyapini Viskova, 2011, E. troshkovensis Viskova, 2011 и E. taylori Viskova, 2011was conducted. It confirmed that these species belong to the family Eleidae. The morphology of these bryozoans is considered as the result of reconstruction of the principal plan of construction of the cylindrical autozooid of the Tubuliporida bryozoans. It took place to the first after Permian-Triassic extinction the radiation of bryozoans that occurred in time of the vast Callovian transgression.

Decarbonizing the global steel industry in a resource-constrained future-a systems perspective.

Decarbonizing the global steel industry hinges on three key limited resources: geological carbon storage, zero-emission electricity and end-of-life scrap. Existing system analysis calls for an accelerated expansion of the supply of these resources to meet the assumed ever-increasing steel demand. In this study, we propose a different view on how to decarbonize the global steel industry, based on the principle that resource supply can only expand in line with historical trends and actual construction plans. Our analysis shows that global steel production cannot grow any further within a Paris-compatible carbon budget, resulting in a shortfall of approximately 30% against 2050 demand. This trajectory involves the phasing out of blast furnaces, along with strong growth in scrap recycling and hydrogen-based production. These findings highlight critical yet often overlooked challenges: (i) reducing excess demand while providing essential services, (ii) producing high-grade steel through upcycling scrap, and (iii) ensuring an equitable distribution of limited production across the globe. These perspectives contrast with those of the current agenda, which largely emphasizes the need to invest in new production technologies. Grounded in a physical basis, this analysis offers a complementary perspective for a more balanced debate in policymaking and industrial strategy. This article is part of the discussion meeting issue 'Sustainable metals: science and systems'.