China Railway Group (China)

Adhesion Dynamics of Ulva -Diatom Biofilms on Mortar Surfaces in Dynamic Marine Environments and Their Mechanistic Roles in Substrate Performance Deterioration

Abstract Considering that current research on biocorrosive building materials is predominantly conducted through field exposure in marine environments or static laboratory cultivation, field tests struggle to achieve precise quantification of individual biological species’ effect...

Thermal response and inlet water temperature estimation for a geothermal bridge deck deicing system

Shallow geothermal energy provides a low-carbon approach to winter bridge-deck heating, but methods for matching heat-supply parameters to meteorological and icing loads remain limited. Field thermal-response tests were conducted on a demonstration bridge in Wuhan, China, and the...

From microseismic monitoring to targeted reinforcement: a data-driven simulation approach for deep tunnel stability

Deep hard-rock tunnels are highly susceptible to localized rock mass damage under the coupling effects of high in-situ stress and blasting disturbances during construction. The complex spatio-temporal evolution of such damage makes real-time identification and mitigation challeng...

Research on Flexural Performance of Truss-Reinforced Composite Slabs with a Single Rectangular Rib

Truss-reinforced concrete composite slabs (TRCs) are extensively applied in prefabricated construction, but the limited stiffness of precast base plates may lead to excessive deformation and cracking during construction. This study investigates the truss-reinforced concrete compo...

A CPWB-DEMATEL-Based Risk Assessment Method for AR-Assisted Overhead Crane Inspection

Applying augmented reality (AR) glasses to overhead crane inspection can significantly improve the efficiency and accuracy of inspection operations. However, this technology also introduces new and complex risks stemming from the intricate interactions between people, machines, t...

Transition of friction properties and failure mechanisms of metal-impregnated carbon strip induced by competition between current-induced lubrication and arc erosion under varying current densities

With the increasing speed of high-speed railways, elevated current-carrying density exacerbates wear failure of metal-impregnated carbon strips in the pantograph-catenary system. This study focuses on the competitive interaction between current-induced lubrication and arc erosion...

An interpretable multi-scale deep learning framework for dam displacement prediction and automated early warning of structural health monitoring

Accurate prediction of displacement and early warning are fundamental to dam structural health monitoring (SHM). Hydrostatic, thermal, and aging-related environmental drivers affect dam displacements at different response rates, leading to heterogeneous hysteresis effects. Existi...

A Semi-Analytical Solution for Interpretation of Hydro-Mechanical Responses of Cylindrical Cavity Expansion in Unsaturated Structural Loess

The cavity expansion solution for loess is absent because the existing elastoplastic models fail to model the sophisticated behaviors of unsaturated loess as a classic axisymmetric boundary-value problem. This paper develops a novel solution for cavity expansion in unsaturated st...

Construction sequence optimization for diaphragm wall obstruction removal using a horizontal full-rotation drilling rig

Abstract Based on a diaphragm wall obstruction-removal project for the undercrossing of an existing metro station in Hangzhou Metro, a diaphragm wall removal method using staged hole-by-hole cutting with a horizontal full-rotation drilling rig is proposed. A three-dimensional fin...

Guilt, Shame, and Compensatory Claims: An Exploratory Case Study of Petitioning by a Victim of Employment Fraud

In the xinfang—or letters-and-visits—complaint reception work of public-sector companies in China, some petitioning matters involve harms that were not directly caused by the company itself. Nevertheless, because the company either controls, or is imagined by the petitioner to co...

Field-Validated Hyperbolic Model Predicts Load Displacement of Untested Grouted Railway Piles

ABSTRACT Current design codes for grouted piles focus exclusively on bearing capacity improvements (β factors) and lack reliable methods for displacement prediction, creating significant risks for settlement-sensitive railway infrastructure. To address this gap, this study propos...

Research and Application of Water Load and Internal Forces in Composite Linings of Subsea Tunnels

Water loads on subsea tunnel linings are governed by the combined effects of seepage, structural deformation, and the grouting zone. However, these factors are often treated separately in existing analytical studies. In this study, an analytical model is developed for steady-stat...

A Multiscale Numerical Approach to Long‐Term Stability Analysis in Rock Engineering

ABSTRACT Long‐term stability of rock engineering structures is controlled by progressive strength degradation under sustained loading, yet direct experimental determination of long‐term strength (LTS) is severely constrained by impractically long testing durations and strong mate...

Experimental study of the startup and heat-transfer performance of a novel two-phase closed thermosyphon with an internal phase-separation structure

Two-phase closed thermosyphons (TPCTs) are widely used as active cooling devices in permafrost engineering. Countercurrent transport of rising gas and returning liquid through a shared flow channel can impede working-medium circulation and constrain heat-transfer performance. Thi...

Seasonally Adaptive Natural Ventilation for Sustainable and Energy-Efficient Large-Space Railway Stations in Hot-Summer and Cold-Winter Regions: A Case Study of Chengdu Station

The rapid expansion of high-speed railway networks has increased the operational energy demand and indoor overheating risk of large-scale, high-volume railway station buildings. Natural ventilation is a climate-responsive passive strategy that can improve indoor environmental qua...

Self‐Assembly of Organic–Inorganic Copolymers Toward Bio‐Inspired Cementitious Composites

ABSTRACT Refined by millions of years of rigorous evolution, highly mineralized biological materials have perfected organic–inorganic self‐assembly to break the traditional trade‐off between strength and damage tolerance. Their rigid‐flexible precursor architectures motivate an o...

Multiscale Mechanisms Governing the Performance Evolution of MgO-GGBS-Stone Powder Lightweight Foamed Soil Under CO2 Curing

To facilitate low-carbon construction technologies in subgrade engineering, this study proposes a carbon-sequestering lightweight foamed soil (C-LFS) using an all-solid-waste binder system in which reactive magnesium oxide (MgO), ground granulated blast-furnace slag (GGBS), and s...