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Wang J.-Q.,Changan University | Wang J.-Q.,Shaanxi Expressway Construction Group Company | Xi J.-P.,Changan University | Xi E.-C.,Changan University
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | Year: 2010

In order to increase expressway capacity and improve expressway service level, a decision-making method of optimal reconstruction time for expressway was proposed. The statistics data of traffic from expressway toll stations were analyzed, and the traffic volumes of future years were predicted by using trend extrapolation method, multinomial regression method and growth factor method. According to the service level of expressway computed with the traffic volumes, the optimal reconstruction time was confirmed when the actual traffic volume equalled to the design traffic volume. Computational result shows that the service level of Xi'an-Baoji expressway is 1.0 in 2011, which is actual optimal reconstruction time, so the decision-making method is reliable. Source

Wang J.-Q.,Changan University | Wang J.-Q.,Shaanxi Expressway Construction Group Company | Xi J.-P.,Changan University | Xi E.-C.,Changan University
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2010

The advantages and disadvantages of different models of expressway reconstruction in China are discussed. The road characteristic, difficulty of traffic organization, project construction costs, technical reliability, road of sustainable development and natural condition are analyzed to develop the evaluation indicator system of expressway reconstruction model, the weighing of every indicator is calculated by entropy method, the evaluation standards and method are proposed, the specific suggestions for selecting the implementation modes by evaluation system are summed up. The results show that the evaluation indicator system can reflect the influence factor to select model and the characteristics of every model. 2 tabs, 6 figs, 10 refs. Source

Feng Z.-J.,Changan University | Wang H.,Shaanxi Expressway Construction Group Company | Wei J.,Changan University | Gao X.,ZhongJiaoTongli Construction Co. | And 2 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2015

In order to ascertain the effect of loess gulch on the bearing capacity of bridge pile foundation, for the first time, based on the self-developed platform model test, the model tests can fully reflect the characteristics and work performance of pile foundation in loess gulch area. The change rules of vertical bearing capacity, pile axial force and lateral friction force of the pile foundation with different slopes and pile lengths are analyzed, and some engineering technical advices are given based on test results. The results show that: (1) With the increase of slope, the bearing capacity of piles with the same pile length decreases, the influence degree of bearing capacity increases gradually, and the range varies from 7% to 35%. (2) The pile bearing capacity increases with the increase of pile length to some extent; when the pile length increases to a certain length, the rate of increase becomes slow. (3) The effective pile length with the same buried depth decreases with the increase of slope. (4) The design of bridge pile foundation should fully consider the engineering technology of preventing the soil around piles being eroded in the loess gulch area. © 2015, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved. Source

Wang Q.,China Earthquake Administration | Wang Q.,Lanzhou Institute of Seismology | Lei X.P.,Shaanxi Expressway Construction Group Company | Wang P.,China Earthquake Administration | Wang P.,Lanzhou Institute of Seismology
Advanced Materials Research | Year: 2014

Brick-wood building is one kind of widespread rural houses in villages and town of China, which has potential hazards to people lives and properties during strong earthquake, so that it is necessary to investigate its earthquake damage behaviors. Based on a great many of earthquake damage examples from historical earthquakes, characteristics and mechanics of earthquake damage of brick-wood building were analyzed and summarized. Earthquake damage modes for brick-wood building are mostly horizontal shearing damage, which tends to occur at positions with weak strength in horizontal direction or weak connections between different structures such as walls between doors and windows, intersections between lengthwise and cross walls, bottom of gable, and connections of beam with sommer beams, et al. Brick-wood building generally has better anti-seismic behaviors in earthquake intensity of VII, while worse behaviors in earthquake intensities of VIII, IX and X. Even though, if reasonable anti-seismic techniques and reinforced measures are applied to brick-wood house, it will have better anti-seismic behaviors. © (2014) Trans Tech Publications, Switzerland. Source

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