Economic and Planning Research Institute of the Ministry of Railways

Beijing, China

Economic and Planning Research Institute of the Ministry of Railways

Beijing, China

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Wang Z.,Beijing Institute of Technology | Liu W.,Beijing Institute of Technology | Liu W.,Economic and Planning Research Institute of the Ministry of Railways
Applied Energy | Year: 2015

Recently, there has been much interest in sustainable transport. However, few studies have examined the driving forces for household transportation emissions from the perspective of individual travel characteristic. This research examines the features and driving factors of CO2 emissions from household daily travel in Beijing from 2000 to 2012. It first investigates the changes in personal travel characteristics and CO2 emissions, and then discusses the effects of population, economic activity, transport capacity, vehicle emission intensity, and individual travel characteristic which includes the effects of transportation intensity, transportation mode share, and vehicle-use intensity on CO2 emissions based on decomposition analysis. Results show that: (1) CO2 emission due to urban traffic has increased from 4.34Mt in 2000 to 18.58Mt in 2012, following an annual growth rate of 13%; (2) the per capita disposable income, vehicle-use intensity, population and transport capacity effects are found to be the main drivers that increase household daily travel CO2 emissions; and (3) the transportation intensity, vehicle emission intensity, and transportation mode share have effects on the reduction of CO2 emissions over the study period. © 2015 Elsevier Ltd.


Zhou Y.,Beijing Jiaotong University | Zhou Y.,China Railway 19th Bureau Group Co. | Li P.,Beijing Jiaotong University | Li P.,Economic and Planning Research Institute of the Ministry of Railways | And 2 more authors.
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University | Year: 2012

The rational design of supporting structure is the key to the design of large section loess tunnel, focusing on a loess railway tunnel in construction, this paper analyses the change situations of the loess tunnel supporting structure, rock stress state and mechanical behavior under the different construction times of initial support by numerical simulation. Centering on the controlling of the rock deformation, a reasonable proposal for construction time of initial support is given. And the force law of loess tunnel initial support is also summed up with the outcomes of field monitoring. Loess has a significant rheological property. A large part of the force acting on the supporting structure is caused by the additional load generated by rock rheology. In addition, the force of supporting structure is not evenly distributed and symmetrical in the space, which should be considered in the design.


Wang Z.,Beijing Institute of Technology | Liu W.,Beijing Institute of Technology | Liu W.,Economic and Planning Research Institute of the Ministry of Railways
Applied Energy | Year: 2015

Recently, there has been much interest in sustainable transport. However, few studies have examined the driving forces for household transportation emissions from the perspective of individual travel characteristic. This research examines the features and driving factors of CO2 emissions from household daily travel in Beijing from 2000 to 2012. It first investigates the changes in personal travel characteristics and CO2 emissions, and then discusses the effects of population, economic activity, transport capacity, vehicle emission intensity, and individual travel characteristic which includes the effects of transportation intensity, transportation mode share, and vehicle-use intensity on CO2 emissions based on decomposition analysis. Results show that: (1) CO2 emission due to urban traffic has increased from 4.34Mt in 2000 to 18.58Mt in 2012, following an annual growth rate of 13%; (2) the per capita disposable income, vehicle-use intensity, population and transport capacity effects are found to be the main drivers that increase household daily travel CO2 emissions; and (3) the transportation intensity, vehicle emission intensity, and transportation mode share have effects on the reduction of CO2 emissions over the study period. © 2015 Elsevier Ltd.


Li P.,Beijing University of Technology | Li P.,Economic and Planning Research Institute of the Ministry of Railways | Li P.,Tsinghua University | Tian S.,Economic and Planning Research Institute of the Ministry of Railways | And 3 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013

Peripheral rock large deformation, shotcrete crack, steel frame distortion and other phenomenon of destruction often appear in the tunnels with soft rock and high geostress due to the high pressure on the primary lining. The safety of tunnel during construction and long-term operation will be affected. Taking Baozheng tunnel along Yiwan Railway as engineering background, based on statistical analysis of in-situ monitoring data, mechanical characteristics of surrounding rock pressure, stress of shotcrete and steel arch, axial force of bolts and deformation distribution of deep seated rock have been analyzed. Development law over time and spatial distribution along the tunnel ring of the above test items are discussed. During the excavation in the tunnel, rock pressure, steel arch stress and shotcrete stress change rapidly, and sensitivity decreases in turn with the character "upper larger, lower smaller" along the tunnel cross section. The analytical method and results can provide references to accurately understand the support-surrounding rock interaction and their mechanical characters.


Zhou Y.,Beijing Jiaotong University | Li P.,Beijing Jiaotong University | Li P.,Economic and Planning Research Institute of the Ministry of railways | Li P.,Tsinghua University
Applied Mechanics and Materials | Year: 2013

Various problems such as sand, mud and water bursting, unstability of tunnel face, large deformation of surrounding rock and severe cracking of primary support occurred in excavation of the water-bearing weak sandstone strata of Huma Ling Tunnel, Lan-Yu railway. Based on the uniaxial compressive strength tests and uniaxial compressive rheological tests on weak sandstone with water content of 0, 2%, 5%, 8% and 12%, the relationship between rheological characteristic and water content of water-bearing weak sandstone is obtained. According to results of tests, factors and water contents are fitted by applying generalized rheological equation of Kelvin. And the rheological equation of water-bearing weak sandstone with various water content is deduced. The test results and conclusion can offer reference for analyzing deformation characteristics and instability mechanism of water-bearing weak sandstone in large cross-section tunnelling. © (2013) Trans Tech Publications, Switzerland.


Li P.,Economic and Planning Research Institute of the Ministry of Railways | Li P.,Tsinghua University | Li P.,Beijing Jiaotong University | Zhao Y.,Economic and Planning Research Institute of the Ministry of Railways | And 4 more authors.
Zhongguo Tiedao Kexue/China Railway Science | Year: 2013

Based on the elastic-plastic solution of thick wall cylinder subjected to uniform pressure, the elastic-plastic analytical solution formula for the stress and deformation of deep circular tunnel with lining considering stress release was deduced. The deduced formula was applied to an engineering case, and compared with the analog solution obtained by finite difference program FLAC3D to verify the correctness of solution formula. Research results indicate that: the timely construction of support with certain stiffness can reduce the stress release of the surrounding rock on excavation face, thus can decrease the plastic deformation of surrounding rock; influenced by the deformation release of excavation face, the deformation of the contact interface between lining and surrounding rock is by no means continuous, and support deformation can not be equivalent to surrounding rock deformation; in calculating the plastic deformation of surrounding rock caused by tunnel excavation, using non-associated flow method can better describe the plastic deformation characteristics of rock (soil) mass after tunnel excavation.


Lu J.-M.,China University of Technology | Tan X.,Economic and Planning Research Institute of the Ministry of Railways
Advanced Materials Research | Year: 2014

This paper studied the current situation of large-scale railway station commercial development, and then found and analyzed the existing key problems. Based on this, a comprehensive evaluation index system was established by applying Delphi method and Analytic Hierarchy Process. Furthermore, each major index of this evaluation system was explained and given the value range. Finally, a corresponding evaluation model was provided with using fuzzy mathematics theory for the large scale railway station commercial development performance evaluation. © (2014) Trans Tech Publications, Switzerland.


Zhu Y.-T.,Beijing Jiaotong University | Mao B.-H.,Beijing Jiaotong University | Li M.-G.,Beijing Jiaotong University | Gan T.-T.,Beijing Jiaotong University | Zhao Y.-G.,Economic and Planning Research Institute of the Ministry of Railways
Jiaotong Yunshu Xitong Gongcheng Yu Xinxi/Journal of Transportation Systems Engineering and Information Technology | Year: 2013

This paper extends the physical nodes and physical arcs, and builds a time-expanded network. Then a schedule-based quasi-dynamic assignment model is proposed with the expanded network. The model takes into account vehicle capacities explicitly and individually, and passengers are loaded on a first-come-first-serve principle. Then, the method of successive averages (MSA) is used to solve the problem. Numerical example empirically demonstrated that the algorithm converges to an equilibrium solution. And the result shows that the arrival distribution of passenger flow can be divided into three types: bimodal pattern, unimodal pattern and non-peak pattern. With the improvement of service level, the arrival distribution change from bimodal pattern to unimodal pattern, finally to the non-peak pattern.


Qin Y.-P.,Economic and Planning Research Institute of the Ministry of Railways
Journal of Railway Engineering Society | Year: 2014

Research purposes: Through summarizeing and drawing lessons from useful experience of the suburban railways of Tokyo, Paris and other typical world cities, the article explores 10 problems in planning and construction of suburban railways in some Chinese cities and put forward proposals to solve the problems. Research conclusions: (1)Serious lag of suburban railways planning and construction in some Chinese cities is one cause of delay of city layout adjustment and optimization and one reason of traffic jams exacerbated. The construction thought of first inner city railways then outside the city should be reversed.(2)In some cities, partial sections of suburban railways are replaced as urban subways, which has led amount of suburban railway too little, and single subway too long with longer travelling time and high investment. The whole rail network will tend to be low operational efficiency and poor investment efficiency.(3)Suburban railways should as far as possible pass through or into the downtown, and interchange with ring railway or subway stations located in the downtown. (4)Cherish the existing railway corridor resources in urban areas. (5)Finance in plural investment mode for construction of suburban railway.(6)Set up moderate technical standards and save investment of construction and operation. (7)Rresearch and formulate uniform technical standards early. (8)The network of city railway should be approved by the national department. (9)Cultivate professional team for design, advisory and construction management. (10)Offer reasonable working hours for suburban railway design, construction and commissioning.

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