Journal of Architectural Research and Development

Analysis of Reinforcement Techniques for Newly Built Tunnel Defects

Yike Wei — 2025-02-10

Newly built tunnels often encounter a series of defects within the first few years of operation. If not promptly addressed and reinforced, these defects threaten the tunnel’s durability and stability and bring severe challenges to its safe operation. This study aims to explore reinforcement techniques for addressing defects in newly built tunnels. The research begins with an analysis of common defects found in newly built tunnels, followed by a case study of the Jinfeng Tunnel in Chongqing, examining the post-construction defects. The actual reinforcement strategies and methods employed for the tunnel are then discussed. Finally, based on the research findings, this study provides insights and references for tunnel operation and construction units in China, aiming to enhance the overall quality of tunnel engineering in the country, align with sustainable development goals, and promote further improvements at a macro level.

Research on the Performance and Diffusion Behavior of Geopolymer Grouting Material Made from Coal Roof Bottom Ash

Xinxin Yu — 2025-02-10

As the cost of grouting treatment for water control in coal roofs during underground coal mining continues to rise, coupled with the accumulation of industrial solid waste resulting from rapid economic development in China, the ecological environment is facing severe challenges. To address these issues, this study, based on a high water-to-cement ratio, uses mine overburden (OB) and furnace bottom ash (FBA) as the primary raw materials, with sodium silicate as the modifier, to develop a new type of geopolymer grouting material with high stability and compressive strength for coal roof water control. Additionally, COMSOL software was used to numerically simulate the diffusion process of the grout slurry in fractures under dynamic water flow. The results indicate that, with a sodium silicate modulus of 1.5 and a dosage of 4%, the stability of the slurry increased by 26.2%, and the 28-day compressive strength improved by 130.98%. Numerical simulations further show that the diffusion process of the slurry is closely related to slurry viscosity, grouting pressure, and grouting time and that the diffusion pattern in the fractures is similar to that of ultra-fine cement slurry. This study provides a theoretical basis for coal mine roof grouting water control projects.

A Review of Research Trends in Public-Private Partnership based on CiteSpace: Bibliometrics and Visualization

Huijie Jiang — 2025-02-10

Applying the Public-Private Partnership (PPP) model is indispensable in creating new economic growth points in the public service sector. However, there is still a lack of research on mapping the application of the PPP model in the new era and context. Therefore, based on reviewing the characteristics and development concepts of the PPP model, this paper uses CiteSpace software to analyze the sample authors, journals, and regions in the Scopus database. This paper aims to explore the current development status, research paradigms, and research gap as well as future trends of the PPP model. The results show that (1) The focus of PPP research has shifted from traditional models such as Build-Operate-Transfer (BOT) and Private Finance Initiatives (PFI) to contemporary themes such as risk management, policy analysis, and project governance. Subsequent research (2014–2018) has emphasized the importance of governance and regulatory frameworks to improve PPP outcomes. (2) The growing academic interest in PPP development in China accounts for 28.78% of the total publications. This surge reflects China’s rapid economic growth and highlights the interplay between government regulation and private financing. Key research themes include risk management, performance evaluation, contractual flexibility, and financing mechanisms, particularly concerning the BOT model. (3) Effective risk management, relationship dynamics, and innovative financing strategies are key components of a strong PPP knowledge framework. Collaborative risk sharing and strong relationships between public and private entities are key to project success, and strategic financing partnerships are necessary to cope with the complexity of large infrastructure projects.

Application of Deep Foundation Pit Construction Technology in Civil Engineering Construction

Nan Jiang — 2025-02-13

As one of the commonly used technologies in modern civil engineering, the construction technology is becoming more and more widely used with the continuous growth of building height. In the construction process of high-rise buildings, the deep foundation pit support provides the necessary stability for the foundation structure of the building project, and more effectively guarantees the quality of the project. Through the reasonable supporting structure, the deep foundation pit technology can effectively prevent the risk of soil collapse, foundation pit deformation and other risks, and improve the safety factor of the whole construction project. Especially in the high-rise buildings, the deep foundation pit support technology can consolidate the foundation for the long-term stability of the project, and significantly prolong the service life of the building. The continuous development of deep foundation pit construction technology is the inevitable demand of high-rise building construction, and also provides a powerful help for the development of civil engineering industry. Based on this, this paper focuses on the application of deep foundation pit construction technology in civil engineering construction.

Research Progress on Earthquake Collapse Resistance of Reinforced Concrete Frame Structures

Haibing Liu — 2025-02-13

With the development of modern society, people put forward higher requirements for building safety, which makes the construction project face new challenges. Reinforced concrete frame structure as a common engineering type, although the construction technology has been relatively mature, but its earthquake collapse ability still needs to be strengthened. This paper analyzes the specific factors that affect the seismic collapse ability of reinforced concrete frame structure, summarizes the previous research results, and puts forward innovative application of fiber-reinforced polymer (FRP) composite materials, play the role of smart materials, improve the isolation and energy dissipation devices, etc., to promote the continuous optimization of reinforced concrete frame structure design, and show better seismic performance.

Study of Chilled Water Storage System in Subway Engineering: A Case Study of a Subway Station in Guangzhou

Cen Li — 2025-02-13

Based on the distribution of cooling load at a subway station and the peak-valley electricity price in Guangzhou, a chilled water storage system is reserved in the ample space above the station’s distribution area. This study proposes a design scheme and operational strategy for a chilled water storage system suitable for subway engineering, based on calculating the cooling load and designing a chilled water storage system in a subway station. Additionally, it proposes calculation coefficients of hourly cooling load suitable for subway engineering and convenient for estimation of hourly cooling load. Furthermore, an economic analysis is conducted by combining hourly cooling load with time-of-use electricity prices. This study provides a reference for the design and application of chilled water storage systems in subsequent subway projects.

Study on the Correlation Between the Preservation Status of Mountain Ancient Buildings, Wind Environment, and Protection Methods — A Case Study of the Rock Temples on Wudang Mountain

Jin Xu — 2025-02-12

The preservation condition of historical buildings is closely related to their ventilation environment. This study focuses on the rock temples in Wudang Mountain, specifically comparing the ventilation conditions of Yinxian Rock and Huayang Rock. The following conclusions are drawn: (1) The main wind direction at Yinxian Rock aligns with its orientation, which is an easterly wind, while Huayang Rock experiences a westerly wind, deviating from its southwestern entrance; (2) Huayang Rock has significantly lower wind speeds compared to Yinxian Rock, with minimal airflow; (3) The surrounding environment of Huayang Rock features steep terrain, dense tree cover, and the presence of railings and other structures that impede wind entry into the cave, whereas Yinxian Rock is surrounded by fewer trees and has a flat terrain; (4) In terms of cave morphology, Yinxian Rock is completely open on the east side, while Huayang Rock’s opening accounts for only half of its area and is not directly aligned with the rock temple. In summary, Huayang Rock’s ventilation environment is inferior to that of Yinxian Rock, leading to more severe pathologies. It is inferred that Huayang Rock’s preservation issues are closely related to its poor ventilation environment. Therefore, improving its ventilation conditions is crucial for preventive conservation. Using environmental simulation, this study compares the ventilation conditions of Huayang Rock under different wind directions and speeds, identifies the two most ideal scenarios, and proposes several feasible solutions.