Renovation of existing steel railway bridges: Field test and numerical simulation

2017 ◽  
Vol 21 (6) ◽  
pp. 809-823 ◽  
Author(s):  
Weiwei Lin ◽  
Nozomu Taniguchi ◽  
Teruhiko Yoda ◽  
Masanori Hansaka ◽  
Shinya Satake ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Railway Bridges

Field test and numerical simulation of the section mill in U-shaped wells of coalbed methane

2020 ◽  
Vol 84 ◽  
pp. 103681
Author(s):  
Jiaqi Che ◽  
Hanxiang Wang ◽  
Yanwen Zhang ◽  
Yuting Wang ◽  
Yanxin Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Coalbed Methane ◽  
Section Mill

scholarly journals Study on reasonable grouting parameters based on UDEC numerical simulation

2019 ◽  
Vol 118 ◽  
pp. 02013
Author(s):  
Fengfeng Yang ◽  
Liping Bai ◽  
Ruiqing Su ◽  
Jufeng Zhang ◽  
Tai Xu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Surrounding Rock ◽  
Frequent Occurrence ◽  
Roof Collapse ◽  
Grouting Reinforcement ◽  
Rock Roadway

In view of the frequent occurrence of roof collapse and chipping accidents in the broken surrounding rock roadway in the goaf, grouting reinforcement is applied to the surrounding rock of the ro ent ratio. The field test proves that the selected grouting parameters are reasonable and achieve the purpose of controlling the deformation of the surrounding rock of the roadway.

The Application of Particle Motion Equation in Coal Handling System of Dissipation Dust Law

2013 ◽  
Vol 313-314 ◽  
pp. 702-705
Author(s):  
Shao Cheng Ge ◽  
Yao Xuan Feng ◽  
De Ji Jing
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Particle Motion ◽  
Theoretical Basis ◽  
Coal Dust ◽  
Motion Equation ◽  
Dust Concentration ◽  
Dust Particles ◽  
Space Application ◽  
Handling System

For getting the effectiveof application in dissipation dust law with particle motion equation atcoal handling system of belt machine tail, must be to proceed related numerical simulation in the way of dust particles motion incoal handling system of belt machine tail and dust concentration of diffusion inoperation space. Application particlemotion equation theory for numerical simulation to coal dustparticles, obtained dust coal dissipation law in coal handling system, at thesame time combine with the data of the field test of dust concentration andfallout dispersion for analyzing and comparing. The results of comparison showthat: the data of numerical simulation with particle motion equationin coal dust dissipation law is coincide with reality dissipation law. Accordingto the conclusion of this research, it is provides theoretical basis forprevention and treatment in coal mine of coal handling system of dustdissipation.

Acoustic Emission (AE) Propagation Attenuation Theory and Rule in Non-Perfect Elastic Coal and Rock

2013 ◽  
Vol 477-478 ◽  
pp. 620-623
Author(s):  
Guo Wei Dong
Keyword(s):  
Numerical Simulation ◽  
Acoustic Emission ◽  
Quality Factor ◽  
Field Test ◽  
Propagation Distance ◽  
Signal Propagation ◽  
Emission Signal ◽  
Ae Signal ◽  
Propagation Rule ◽  
Quality Factor Q

Propagation rule of acoustic emission (AE) signal in coal and rock is an important basis when AE technique forecasts coal and rock dynamical disasters. Based on correlative theory of quality factor Q, Acoustic emission signal propagation attenuation formula in non-perfect elastic coal and rock are analyzed, Based on the theoretic formula, Effects of different quality factor and propagation distance on AE propagation attenuation are theoretically analyzed ;Based on theoretic analysis results, AE signal propagation numerical simulation and field test programs are designed, AE signal propagation rules in elastoplastic coal and rock are obtained. Field test and numerical simulation experimentation results validate rationality of theoretic forumla. Study production can guide AE technique that forecasts mine and rock dynamical disasters.

Study on the Wind-Sand Flow Movement Characteristics and the Shielding Effect of the Wind-Break Wall along the Railway in Gobi Area

2012 ◽  
Vol 178-181 ◽  
pp. 1653-1657 ◽  
Author(s):  
Jian Jun Cheng
Keyword(s):  
Numerical Simulation ◽  
Field Test ◽  
Shielding Effect ◽  
Leeward Side ◽  
Field Surveys ◽  
Movement Characteristics ◽  
Large Vortex ◽  
Sand Flow ◽  
Term Monitoring

Based on the large number of field surveys and long-term monitoring data of Hongceng, Hongliu and MengliuDong monitoring points, the wind-sand flow movement characteristics along the railway in Gobi area was analyzed. The shielding effect of the wind-break wall was evaluated by the methods of numerical simulation and field test. Conclusions drawn as followings: the wind-sand flow movement in Gobi area is characterized by stable of direction, seasonal, high-velocity,long-term,and shorting of starting-up time and moresand content. Numerical simulation shows that the wind flow form a large vortex region on the leeward side of wall, the flow field elements occurs significant changes. Both field test data and numerical simulations indicated that 3.0m height of wind-break wall meet the requirement of shielding wind-sand flow.

Study on Vertical Earth Pressure of Slab Culvert under High Embankment

2012 ◽  
Vol 256-259 ◽  
pp. 1898-1902 ◽  
Author(s):  
Bao Kuan Ning ◽  
He Fan ◽  
Lei Gong ◽  
Guo Qing Liu
Keyword(s):  
Numerical Simulation ◽  
Boundary Conditions ◽  
Field Test ◽  
Structural Design ◽  
Earth Pressure ◽  
Test Results ◽  
Soil Pressure ◽  
Vertical Earth Pressure ◽  
The Impact ◽  
Good Agreement

With the increasing of embankment culvert engineering applications, there has been due in part to the structural design is too conservative and not economic or select unreasonable structural form, leading to the phenomenon of cracking or even collapse of the culvert structure, and the phenomenon has seriously affected the normal use of the highway. In this paper, the numerical simulation of vertical earth pressure distribution on different structural forms of embankment on culverts, to discuss the impact of boundary conditions, fill height, the thickness of the culvert culverts vertical earth pressure. Combined with Heda highway a culvert covert field test results and numerical simulation results were compared and analyzed. The results show that the numerical simulation and field test results in good agreement with the culvert structure in the form of vertical earth pressure of the embankment culverts have a greater impact; the structure of different forms of the culvert in the upper soil pressure is significantly different. In addition, analysis of the impact of boundary conditions, filling height of culvert vertical earth pressure values. The results can reference for the study of the structural design of the embankment culverts security.

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