Most papers are machine-translated to English; some are originally in English.
Showing 50 of 516 papers in Earth & Space
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…
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…
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 …
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…
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 …
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.…
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…
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…
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…
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…
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…
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…
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…
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 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…
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…
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…
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…
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…
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 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…
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…
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…
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…
To investigate the construction technology of tri-mode tunnel boring machines (TBMs) operating in TBM mode within full-face rock strata, this study takes the shield tunnel section project between Luogang Station and Shuixi Station on Guangzhou Metro Line 7 Phase II as the research background, and su…
Shield tunneling is increasingly applied in underground engineering construction due to its high safety and excellent construction efficiency. During long-distance tunneling in mixed ground conditions, extra-large diameter slurry shields are prone to muck accumulation and poor discharge at the front…
The topography of submarine bedrock areas is rugged and uneven, characterized by alternating peaks and valleys with substantial dispersion in water depth data. Typically composed of moderately to slightly weathered granite, these formations exhibit high rock strength and complex terrain, necessitati…
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…
With the development of modern economy and the progress of the era, cities continue to develop and prosper. In the process of urban construction, shield tunneling is gradually being adopted in the construction of power tunnel projects. To address the inherent limitation of insufficient launching sha…
In modern urban subway construction, the construction of connecting passages between subway stations and their entrances/exits constitutes an engineering task characterized by high technical complexity and substantial risk factors. Particularly in zones with shallow overburden depth, the application…
During the construction of deep foundation pits adjacent to existing subway structures, the complexity of engineering geological and boundary conditions renders theoretical analysis inadequate for accurately calculating deformation and internal force variations in adjacent subway structures, making …
As a specialized tunnel excavation tool, the shield machine offers advantages of high efficiency, safety, and rapid construction, and is widely employed in urban rail transit and railway tunnel projects. However, during shield construction, excavation trajectory exceeding limits (including horizonta…
Rock aggregates have been extensively exploited in construction, and the associated engineering features play a critical role in their application. The main aim of this research is to assess the impact of petrographic characteristics on the engineering properties of carbonate rocks. A total of 45 ca…
Lunar Laser Ranging has extremely high requirements for the pointing accuracy of the telescopes used. To improve its pointing accuracy and solve the problem of insufficiently accurate telescope pointing correction achieved by tracking stars in the all-sky region, we propose a processing scheme to se…
Previous studies aiming to accelerate data processing have focused on enhancement algorithms, using the graphics processing unit (GPU) to speed up programs, and thread-level parallelism. These methods overlook maximizing the utilization of existing central processing unit (CPU) resources and reducin…
Radio environment plays an important role in radio astronomy observations. Further analysis is needed on the time and intensity distributions of interference signals for long-term radio environment monitoring. Sample variance is an important estimate of the interference signal decision threshold. He…
The Ground-based Wide-Angle Cameras array necessitates the integration of more than 100 hardware devices, 100 servers, and 2 500 software modules that must be synchronized within a 3-second imaging cycle. However, the complexity of real-time, high-concurrency processing of large datasets has histori…
The performance of the deconvolution algorithm plays a crucial role in data processing of radio interferometers. The multi-scale multi-frequency synthesis (MSMFS) CLEAN is a widely used deconvolution algorithm for radio interferometric imaging, which combines the advantages of both wide-band synthes…
Superconducting kinetic inductance detectors (KIDs) are considered to be a highly promising technique for the large-scale imaging of millimeter and submillimeter waves in astronomy. As the pixel density and the array size increase, the electromagnetic crosstalk inevitably becomes a problem that prev…
For mountainous highway engineering, the local utilization of earth-rock materials for roadbed filling can significantly reduce transportation costs and improve resource utilization efficiency. However, earth-rock mixed fill often faces the following problems in engineering applications: (1) The roc…
