China Railway Construction Corporation (China)

Horizontal Bearing Behavior and Reinforcement Efficiency of Cemented Soil Mixed Reinforced (CSMR) Pile: Model Tests and Numerical Simulations

Local cemented soil improvement is an effective means of enhancing the horizontal resistance of pile foundations, although the associated redistribution of horizontal loads and the efficiency of cemented soil usage have not yet been fully clarified. This study combines horizontal...

Influences of tunnel radius on minimum overburden thickness for underwater shield tunnels crossing structural planes

To ensure the stability and cost-effectiveness of underwater shield tunnels, reasonable design of the minimum overburden thickness is required. Nevertheless, how to rationally determine this thickness remains unclear when the coupled effects of rock structural planes and tunnel r...

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 Cross-Modal Consistency and Reliability-Aware Fusion Network for Railway Foreign-Object Segmentation

Real-time segmentation of foreign objects between rails is essential for high-speed railway inspection. Single-modality perception remains limited because two-dimensional images provide rich texture but lack depth, whereas point clouds provide geometry but are weak in color and m...

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...

Influence of longitudinal and transverse gaps of C-shaped steel restrainers on the seismic performance of friction-pendulum-isolated railway bridges under oblique seismic excitation

To prevent excessive displacement of friction pendulum bearings (FPBs) under earthquake action and the associated increase in unseating risk, this study considered a simply supported high-speed railway bridge with 50 m hollow piers. A full-bridge finite element model with FPBs eq...

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...

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...

Rail Light-Strip Abnormality Analysis from Color Inspection Images Using an Improved SegFormer and Geometric Rules

Rail light-strip morphology reflects the wheel-rail contact condition. Reliable automatic analysis remains difficult. The strip is narrow and has weak boundaries, while specular reflection, rail-head texture and trackside background interfere with color inspection images. This st...

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...