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Niu H.,Hunan University | Zhou S.,China Railway Eryuan Engineering Group Coltd | Chen Z.,Hunan University | Hua X.,Hunan University
Wind and Structures, An International Journal | Year: 2015

Aerodynamic forces of vortex-induced vibration and galloping are going to be coupled when their onset velocities are close to each other, which will induce the cross-wind amplitudes of the structures increased continuouslywith ever-increasing wind velocities. The main purpose of the present work is going to propose an empirical formula to predict the response amplitude of VIV-galloping interaction. Firstly, two typical mathematical models for the coupled oscillations, i.e.,Tamura & Shimada model and Parkinson & Corless model are comparatively summarized. Then, the key parameter affecting response amplitude is determined through comparative numerical simulations with Tamura & Shimada model. For rectangular cylinderswith the side ratio from 0.5 to 2.5, which are actually prone to develop the VIV and galloping induced interaction responses, an empirical amplitude prediction formula is proposed afterregression analysis on comprehensively collected experimental data with the predetermined key parameter. Copyright © 2015 Techno-Press, Ltd.

Zhang X.,Tongji University | Wu H.,Shanghai Tunnel Engineering Co.Ltd. | Li Q.,China Railway Eryuan Engineering Group Coltd | Bai Y.,Tongji University
ITA-AITES World Tunnel Congress 2016, WTC 2016 | Year: 2016

Construction activities account for a large share of the global Greenhouse Gas emission. In the past 10 years, project decision-makers and researchers have been paying more attention to the carbon emission of tunnel projects. In this paper we study the carbon emission calculation in shield tunneling. The objective of this paper is to: (1) analyze the complex variables which affect the total emission of shield tunneling; (2) develop and illustrate a new data-mining-based method to estimate the carbon emission in the construction phase; (3) assess the emission prediction reliability of a data-mining-based method-the Randomforst model, with R programming language. This study is based on a large-diameter shield tunnel built in Shanghai, China, and shows that a reliable predictive performance can be achieved with this new data-mining-based method.

Li Z.,Southwest Jiaotong University | Cao S.,China Railway Eryuan Engineering Group Coltd | Su W.,Eastern Alliance Construction Engineering CO.LTD
Applied Mechanics and Materials | Year: 2013

On the basis of the traffic cost model and the land value function model, this paper analyzes and reveals the interaction of the urban rail transit construction and the surrounding land price. It also illustrates the feasibility and the necessity of the comprehensive development of adjacent land of urban rail transit. © (2013) Trans Tech Publications, Switzerland.

Yue Z.Q.,China Railway Eryuan Engineering Group Coltd
Applied Mechanics and Materials | Year: 2014

Guizhou section of Chengdu-Guiyang Railway is located in northwestern GuizhouPlateau, which belongs to Chishui River and Wujiang Drainage Area. Thegeologic structures are mainly the fold or fracture in the direction of North-North East, and have Flat rock. Carbonate rocks are widely distributed on the surface of this area. All kinds of karst pronounced,and water and soil conservation is very bad. Rocky desertification is serious, and environmental is sensitive. Karst is one of the main unfavorable geology of control line scheme. In this paper, from the regional geological environment and regional hydrological environment,analysis of the factors influencing karst has been done. The development regularities of karstis summarized, and the corresponding classification standards are provided. Through the comprehensive analysis of each line program of geological factors,karst geological basis for the route plan is provided. © (2014) Trans Tech Publications, Switzerland.

Yu N.,Chengdu University of Technology | Yu N.,China Railway Eryuan Engineering Group Coltd | Zhao N.,Henan Polytechnic University
Communications in Computer and Information Science | Year: 2011

In the fields of petroleum exploration and engineering geology, complex 3D stratum model is always necessary to be constructed and used for analogue calculation or geological study. On the basis of analyzing features of 3D stratum modeling, this paper proposes a set of complete 3D stratum modeling algorithm based on the profile reconstruction. The algorithm can help the user to carry out interactive modeling by using the existing data simply with a high efficiency, and to construct complex model having fault; therefore, it has good practicability. © 2011 Springer-Verlag.

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