Automatically translated preprints from the Chinese arXiv (ChinaXiv).
Showing 50 of 1495 papers
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…
Structural planes (such as joints, natural fractures, and faults) that are extensively developed in unconventional reservoirs significantly control the propagation morphology of hydraulic fractures. To fully stimulate the reservoir and enhance ultimate recovery, it is necessary to accurately predict…
To investigate the influence of parallel fracture stress on hydraulic fracture propagation, this study pre-fabricated penny-shaped fractures in 30 cm cubic artificial cement specimens, with 4 FBG optical fibers containing a total of 20 strain measurement points positioned ahead of the fracture front…
Soil conditioning is a critical technology for ensuring tunnel face stability and excavation efficiency in Earth Pressure Balance (EPB) shield tunneling. Commonly used conditioning agents include water, foam, bentonite slurry, polymers, and other materials. While existing research has experimentally…
With the continuous advancement of national urbanization and the ongoing improvement of infrastructure construction, urban underground space is gradually being exploited, and large-scale infrastructure projects are increasingly intersecting and interacting, giving rise to the issue of protecting pre…
Accurately obtaining acoustic velocity parameters of soft rock formations (e.g., near-surface soils, seabed sediments) is essential for calculating their key mechanical parameters (Young's modulus and Poisson's ratio). However, existing in-situ acoustic velocity measurement techniques suffer from li…
Due to the complex geological conditions in Guangzhou, shield tunneling frequently encounters problems such as abnormal cutter wear and poor muck discharge due to slag accumulation in the chamber. Chamber cleaning is an effective solution; however, constrained by geological conditions and surface en…
Tunnel construction by mining method in water-rich sandy cobble strata faces challenges including surrounding rock instability, water and sand inrush, and settlement control. The conventional shallow buried mining method suffers from poor grouting effectiveness and low support efficiency. The sandy …
With the widespread application of shield tunneling technology in complex hard rock strata, the impact of cutter housing assembly configurations in atmospheric pressure cutterhead shield machines on construction efficiency and safety has become increasingly prominent. This paper investigates the Gua…
As a critical stage in shield method construction, large-diameter shield arrival technology involves complex processes with substantial risks. To mitigate potential hazards such as water seepage, sudden inrush, cracking, and settlement during shield reception in shallow overburden and highly permeab…
