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Zhu J.,Shanghai Investment Consulting Corporation
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2010

In order to determine traffic impedance of waterway, the property of vessel traffic flow was researched. A new traffic impedance model based on vessel traffic flow was developed and the characters of waterway with ship lock or without ship lock were analyzed, so that the model could describe the benefit of origin-destination under different states of traffic flow. The computation results of examples show that the model is feasible and credible. The model can determine traffic impedance of any path with some investigation data, which may offer theoretic basis to the assignment and planning of waterway network.


Zhu H.,Tongji University | Qu H.,Shanghai Investment Consulting Corporation | Cai Y.,Tongji University | Huang F.,Tongji University
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2011

Process design method(PDM) of road tunnel with large cross-section is introduced according to the in-situ test study and finite element method(FEM) numerical simulation analysis of road tunnels in Longtoushan and Lanfeng, while the correlative practical mode is built subsequently. PDM is established based on the load-structure design method, and the loose load zone is defined by maximum tension strain of surrounding rock. PDM emphasizes more consideration about effect of a tunnel construction process, which is very different from both traditional road tunnel design codes and Protodyaknov's(PUSI) theory. PDM optimizes the comparatively conservative support parameters by common design method, at the same time, of course can ensure the tunnel be at a whole safe state. Two engineering applications with different construction methods: double and single side-wall drift pilot excavations are studied, and the results show that PDM is more credible and practical than usual state one, and is better fit for the in-situ construction of tunnels with large cross-section. The results from this paper are in favor of advancing more efficient and reasonable design method of road tunnel with large cross-section, as well as to promote the current design level.


Zhou D.,TU Munich | Cao L.,China Railway Siyuan Survey and Design Group Co. | Fang S.,China Railway Eryuan Engineering Group Co. | Qu H.,Shanghai Investment Consulting Corporation | Ma Y.,China Petroleum East China Design Institute
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2011

The mechanical behaviors of twin tube large cross-section tunnels with a total of eight traffic lanes are complex, and the construction methods diverse. In-situ test of the lining structure was conducted for the largest cross-section four-lane highway tunnel in China, and the 3D-effect of the deformation and stress of the lining structure constructed using the double-side-drift method was analyzed. The results indicated that during the construction, the excavation of the lower bench in the left drift and the bench in the core rock significantly affected the deformation and stress of the support structure. The longitudinal range of influence of the excavation of the tunnel is about 1 to 1.5 times of the drift span, from 8 to 12 m ahead of the work face.


Li W.,Shanghai JiaoTong University | Feng X.,Shanghai Investment Consulting Corporation | Yu L.J.,Shanghai JiaoTong University | Xu J.,Shanghai JiaoTong University
Applied Thermal Engineering | Year: 2011

Research in the paper sets some initial conditions, boundary conditions, and hypotheses for a mathematic model. Three kinds of pure fluid and one mixture were selected as working fluids and their parametric changes were calculated under different evaporating temperatures. When organic Rankine cycle (ORC) is equipped with internal heat exchanger (IHE), its parameters varies while using different working fluids. Then results were compared to get conclusions. © 2011 Elsevier Ltd. All rights reserved.

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