Most papers are machine-translated to English; some are originally in English.
Showing 50 of 1733 papers
Severe nuclear accidents (such as severe reactor accidents and terrorist attacks involving radioactive materials) are typically accompanied by violent explosions, and the air surrounding the leaked fission products will inevitably be disturbed by shock waves. To reasonably assess the delayed nuclear…
Mobile hot cell is a radioactive material handling facility that can be transported integrally and rapidly reassembled at the target site, which addresses the issues of poor flexibility and mobility inherent in traditional fixed hot cells through modular design. With the development of the nuclear i…
In this study, a compact X-band dual-mode electron linear accelerator (linac) was developed for medical radiotherapy applications, which is capable of generating both 100 mA / 6 MeV beams for X-ray radiotherapy (low-energy mode) and 10 mA / 13.5 MeV beams for electron radiotherapy (high-energy mode)…
To thoroughly investigate the degree of surrounding rock damage during the bench blasting process in tunnel engineering, this study takes a certain Grade II surrounding rock as an example, starting from the mechanism of crack generation in a single blasthole, exploring the interaction mechanism betw…
The Juji Tunnel of the Lida Expressway traverses complex and variable highly weathered, thin-bedded shale strata. The surrounding rock is inherently weak and fractured, with severe large deformation occurring after tunnel excavation. The overall stability of the surrounding rock is poor, and under t…
To investigate the seepage behavior in karst tunnel surrounding rock, the Yesanguan Tunnel of the Yi-Wan Railway was selected as the engineering case study. Key factors influencing surrounding rock seepage were identified through analysis of engineering data and literature review. An elastic damage-…
Karst geological regions, due to their unique geological structures and surface morphologies, frequently encounter hydrogeological issues such as water inrush, posing potential threats to the stability and safety of urban tunnels. This study investigates the impact of karst geological water inrush o…
Sleeve valve pipe grouting technology has been employed for many years with numerous engineering applications. However, Guiyang Metro planning was initiated relatively late. To study the construction technical parameters of sleeve valve pipe grouting under the geological conditions of Guiyang, this …
The bench method exhibits significant advantages in saving construction time and improving mechanized operation levels, but has certain limitations in controlling surrounding rock stability and preventing deformation. To reduce the deformation impact of bench excavation on tunnel surrounding rock, t…
The Taixi Railway Heping Tunnel traverses fault fracture zones characterized by highly fractured rock masses in lithological contact zones, well-developed intrusive and fault structures, extremely poor surrounding rock stability, and a strongly water-rich environment, which renders water inrush and …
Taking the Hulinjia Tunnel as a case study, the deformation characteristics of tunnel surrounding rock were thoroughly investigated through field monitoring methods, and corresponding support measures were proposed to ensure safe, stable, and normal tunnel operation. The research results indicate th…
Based on a deep foundation pit project for a cable tunnel, a numerical calculation model of the deep foundation pit and its supporting structure was established using MIDAS GTS NX software, and the numerical model was validated through analysis of field measurement data. The effects of parameters su…
Deep foundation pit support constitutes a critical component for ensuring safety in underground construction and stability of the surrounding environment, wherein the selection and application of appropriate technologies holds significant importance. Diaphragm walls, owing to their superior water-se…
In building foundation and substructure construction, ensuring safe production necessitates enhanced support measures for deep foundation pits to control deformation, collapse, and cracking of pit wall slopes, thereby preventing safety accidents. The application of interlocking piles in deep foundat…
Taking the deep foundation pit excavation of a certain cable tunnel as the research object, a numerical calculation model was established based on Midas GTS NX software, validated using field measurement results, and further employed to investigate the dewatering and deformation characteristics duri…
To address land resource scarcity in high-density urban environments, this study proposes a development technology system for ultra-deep underground space (-130 m) based on regular hexagonal honeycomb topology. Through collaborative design of a three-level road network architecture (main artery Φ30 …
With the advancement of construction technology, concrete members have become the predominant structural form in buildings. However, most ordinary concrete members operate in a cracked state, and the causes of crack formation are multifaceted. Therefore, classifying cracks based on their causes and …
To investigate the distribution characteristics and development patterns of the hydration heat temperature field in large-tonnage PC box girders during whole-span prefabrication, field monitoring and analysis of the hydration heat temperature field were conducted during the casting process of a 50 m…
Employing a long-term chloride salt wet-dry cycling test method, this study investigates the influence of different steel fiber volume fractions on the chloride ion transport properties of UHPC, and analyzes the temporal evolution of the apparent chloride diffusion coefficient and surface chloride c…
Advanced geological forecasting was performed using the TSP203 equipment for the Heping Tunnel and Chongli Tunnel of the Taichong Section of the Taixi Railway. Building upon the analysis of existing geological data, geophysical prospecting methods were utilized to detect, analyze, interpret, and for…
To investigate the advantages of shaped charge blasting compared to traditional smooth blasting in multi-jointed tunnels, four double-hole smooth blasting and shaped charge blasting models were established to study the influence law of the angle between joints and the line connecting blastholes on o…
With the development of rail transit technology, shield tunneling machines grinding piles while undercrossing existing structures has become increasingly commonplace. Improper parameter selection can not only cause damage to shield machine equipment, but may even lead to secondary disasters such as …
As a typical dynamic disaster in underground engineering, the occurrence mechanism of rockburst is jointly influenced by various spatially heterogeneous factors and potential long-range coupling relationships. Although traditional graph neural networks can process local structural information, signi…
Slurry shield construction generates substantial waste muck, which not only occupies site space but also causes environmental pollution and incurs additional disposal costs. To achieve resource utilization of muck and reduce construction costs, this study investigates the use of muck as a bentonite …
Taking the foundation pit project of Tanggu Station on Line B1 in Binhai New Area, Tianjin as the engineering background, the confined aquifer water level in this region is significantly lower than the ground water level, and leakage effects occur under the influence of dewatering and excavation. A …
Research on the dynamic mechanical properties of coal rock has gradually become an active area of investigation; however, most dynamic loading experiments are completed instantaneously, precluding detailed study of failure and damage mechanisms. Therefore, this study employs LS-DYNA software to cond…
The trenching process of ultra-deep diaphragm walls under water-rich geological conditions suffers from defects including low construction efficiency, high construction costs, and severe water leakage, which significantly affects subsequent foundation pit excavation and stability as well as main str…
Steel trestle bridges have become an important technical solution for addressing construction challenges in top-down deep foundation pits with limited working space, difficulties in excavation removal and construction material transportation, due to their characteristics of convenient assembly and d…
In the construction and operation of compressed air energy storage caverns, the balance between economic viability and stability has become increasingly prominent. To this end, this study aims to establish a feasibility evaluation system for compressed air energy storage caverns that considers both …
The trenching of ultra-deep diaphragm walls when traversing adverse engineering geological conditions is characterized by poor trenching quality, low efficiency, and high costs, which exert significant impacts on subsequent foundation pit excavation, stability, and main structural quality. This pape…
Large-diameter slurry shield tunneling generates substantial amounts of slurry during construction. To reduce disposal costs of waste slurry and achieve resource utilization while addressing grouting reinforcement requirements in silt soil strata, this study systematically investigated the influence…
Rockburst, as a serious geological hazard, often poses significant threats to tunnel stability and construction safety. Traditional circular tunnels under non-hydrostatic pressure conditions tend to form localized stress concentration zones in the surrounding rock, which can easily induce rockburst.…
In the field of rock mechanics and engineering, the fusion analysis of multi-source heterogeneous data such as lithology and stress constitutes the core foundation for geological disaster early warning and underground engineering stability assessment. Current rock data modeling based on Graph Convol…
The receiving portal of a shield tunnel at an interval ventilation shaft for a subway project in the North China Plain is situated in strata that primarily consist of silty clay, clayey silt, and fine sand from top to bottom, characterized by a high groundwater table and high fluidity. For safety co…
Hydropower projects with dam heights exceeding 200m feature stringent seepage prevention requirements and significant leakage hazards, leading to increasing emphasis on seepage prevention curtains by construction entities. To ensure seepage control effectiveness, designs often adopt elevated groutin…
With the continuous development of engineering construction and the widespread adoption of high-power electrical equipment, the importance of electricity at construction sites has become increasingly prominent, making temporary electricity planning essential for ensuring the successful completion of…
This paper proposes an Enhanced Context-Aware Reasoning Framework (E-CARP) to improve the performance and interpretability of text classification tasks. The framework employs a fully endogenous parameterized memory network for storing domain knowledge and incorporates a dynamic relation reasoning me…
Rockburst is a dynamic instability disaster triggered by the sudden release of elastic strain energy in rock masses during deep underground engineering excavation, and represents one of the common geological hazards in deep underground engineering. Rockburst incidents occur frequently, posing severe…
Concrete structures after construction and commissioning exhibit various diseases with diverse characteristics and varying degrees of severity during their service life. Some of these disease problems are special, emergency, and particularly challenging to address. For instance, when large-area air …
Based on the Pudong open-cut section of the Yindu Road Cross-River Tunnel New Construction Project, this paper introduces the construction technology for prefabricated assembled side walls. Compared with traditional construction methods that predominantly employ cast-in-place concrete for open secti…
With the rapid development of urban rail transit construction, the development and utilization of underground space is increasing. Water leakage in underground structures not only affects the normal use of buildings and reduces the surface aesthetic quality of structures, but also long-term water le…
In the construction of urban rail transit, cracks in concrete structures are inevitable. The ability to properly manage concrete cracking issues determines whether structures can meet serviceability and durability requirements. This study leverages the ongoing subway station project of Fuzhou Urban …
As a novel tunnel cross-section configuration, the rectangular-like tunnel employs a single-tunnel double-track layout, which substantially conserves underground space and reduces demolition and modification costs compared to conventional circular tunnels. Moreover, its distinctive structural and cr…
Taking the Mawan Cross-sea Channel Project as an example, this paper introduces the synchronous construction technology for roads in shield tunnel sections. This technology employs internal construction control measures, integrates prefabrication with cast-in-place construction, and achieves synchro…
Railway ballastless track is critical for maintaining track stability and extending service life. However, its effectiveness may be compromised by settlement, propagation, and scaling, thereby affecting the safe operation of trains. To address this challenge, this study developed an intelligent dete…
With the development of transportation in major cities across China, the proportion of large-scale highway tunnel construction within urban underground rail transit organizational systems has gradually increased. Highway tunnels constructed using large-diameter shield tunneling methods are character…
This study analyzed the adsorption mechanism and temporal performance of permeable reactive barriers (PRB) filled with bamboo charcoal-zeolite mixtures, employing physical and mechanical testing, static batch and dynamic column experiments, microscopic characterization analysis, and groundwater nume…
The Haizhu Bay Tunnel is the first extra-large diameter shield tunnel in the Guangzhou region. Its construction faces complex geological conditions, known as a "geological museum," making shield machine selection critical to project success. This study, based on this project, comprehensively conside…
The article provides a brief description of honeycomb-shaped segments, comparing their advantages and disadvantages with other segment types. It introduces the application of honeycomb-shaped segment lining in various engineering projects and presents an overview of the steel mold design for honeyco…
This paper presents the settlement control technology for super-large cross-section rectangular pipe-jacking construction in muddy soil layers, using as a case study the rectangular pipe-jacking section between Provincial Hospital Station and East Gate Station on Fuzhou Metro Line 4, which represent…
