A5000625755- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Underground Structures
- Rock Mechanics and Modeling
- Civil and Geotechnical Engineering Research
- Grouting, Rheology, and Soil Mechanics
- Aerodynamics and Fluid Dynamics Research
- Fluid Dynamics and Vibration Analysis
- Wind and Air Flow Studies
- Railway Engineering and Dynamics
- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Soil Mechanics
- Resource-Constrained Project Scheduling
- Structural Load-Bearing Analysis
- Scheduling and Optimization Algorithms
- Structural Behavior of Reinforced Concrete
- Icing and De-icing Technologies
- Seismic Imaging and Inversion Techniques
- Geomechanics and Mining Engineering
- Tunneling and Rock Mechanics
- Underground infrastructure and sustainability
- Scheduling and Timetabling Solutions
- Innovative concrete reinforcement materials
- Drilling and Well Engineering
China Academy of Railway Sciences
2009-2024
China Railway Economic and Planning Research Institute
2021
The MPW that emits from a tunnel’s exit when high-speed train passes through is serious environmental problem which increases rapidly with the speed of train. To alleviate at 400 km/h, aerodynamic effects caused by hood located entrance or tunnel are studied numerical method, and influences geometry, such as an enlarged cross-section, oblique entrance, opening holes on MPW, also investigated. research indicates cross-section has opposite section can extending rising time compression wave...
To solve the engineering problem of first tunnel lining cracking caused by second construction double-arch highway tunnels, a research method combining distributed optical-fibre monitoring, inversion analysis and numerical simulation that can reflect was presented. Optical fibres were laid on opposite sides steel arches inside lining. Embedded monitoring conducted continuously during driving. Based fibre-optic strain profile, deduced warned in time. The mechanical behaviour arch investigated...
In this paper, 25‐ton and 27‐ton axle heavy trucks are used to carry out moving loading dynamic real vehicle test on the cracked section, intact repaired section of a railway tunnel foundation performance basement structure with change loads health conditions. By analyzing influence law response fatigue life haul train under different conditions (intact, damaged, repaired), adaptability equipment freight load is clarified. The results show that (1) can meet normal operation trains in good...
After decades of research in the field high-speed railway technique, technology running trains at velocity level 350 km/h gradually become mature. It is great importance to capture variation regular aerodynamic parameters situation that train runs a higher speed level. The present paper motivated by this knowledge gap, both tests and numerical simulations were conducted help illustrate basic characteristic transient pressure loads, micro-pressure wave, as well wave propagation inside tunnel...
With the continuous increase of railway transportation volume, aging problem tunnel bottom structure is becoming more and serious, which seriously threatens safe operation trains. Based on cause analysis field detection defects at structure, “Anchor‐Grouting‐Drainage” treatment technology summarized. The research shows that (1) simple can effectively repair under conditions narrow site, short time maintenance skylight, strict requirements track size variation, no interference with normal...
An increasing number of railway tunnels are afflicted with tunnel lining diseases. Through on-site detection diseases in double-track tunnels, this paper analyzed its causative factors and developed a section steel arch frame reinforcement. simulation mechanical performance, both the plate concrete met tensile strength code requirements for design (TB 10003-2016). It effectively repaired damage from under narrow-site short maintenance “window” time conditions without affecting normal...
According to the existing personnel structure, quantity, development strategy, and market demand of Shuohuang Railway Company’s operation maintenance project, quantity various employees company for past three years is predicted, a human resource optimization model based on resources future plans established. Then, optimal solutions two mathematical models were calculated analyzed using LINGO software. Finally, combined with actual situation, allocation project KY was obtained. The following...
In situ stress is the natural existing in stratum without engineering disturbance, also known as initial stress, absolute or original rock stress. order to master of Manmushu Tunnel and Mamo Southwest China, casing solution method adopted this paper. Through combination field measurement laboratory test, basic data such strain during relief are collected, values analyzed with indoor temperature compensation confining pressure calibration, relevant mechanics tests. The measured results show...
Thin-bed soft rock is one of the main factors causing large deformations tunnels. In addition to relying on some innovative construction techniques, detecting thin beds early during surface geological exploration and advanced prediction can provide a basis for planning implementing effective coping measures. The commonly used seismic methods cannot meet requirement detection accuracy. A high-resolution (HR) signal processing method proposed by introducing sequential convolutional neural...
When the tunnel has damages such as deformation and cracking, lining structure should be set to reinforce tunnel. In this study, a three-dimensional numerical method is performed study aerodynamic effects caused by train passing through with segmented linings at 350 km/h. The influence of numbers, thickness, location, types on MPW analyzed. results show that located middle have better mitigation effect than normal linings, which increases segment number thickness linings. damage occurs near...
Due to the complexity of tunnels, accurate prediction their loosening pressures in layered jointed rock strata is a very difficult engineering task. To recognize patterns and estimate pressures, numerical tests were employed areas where tunnels excavated strata. A total 12 influential factors, including joints, tunnel depth, strata, considered each models. Three found testing: ringent trumpet-shaped boundary, an arch-shaped closing-trend zone. Empirical expressions for zone boundaries...