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On Reducing Investments of Metro Construction in China
Shi Zhongheng
Strategic Study of CAE 2001, Volume 3, Issue 1, Pages 36-39
In this article, adhering to the principles of advanced in technology, reliable in safety, economical in investment and practical in functions, the possibilities for reducing metro construction costs are analysed, and the following tentative suggestions for reducing metro construction costs are proposed：making fully preparations before constructing; paying great attention to passenger number forecast, so as to determine the scale of metro construction; taking increasing driving density of trains into consideration; choosing reasonable structural style and embedded depth of metro station; determining reasonable areas of the station rooms for equipment arrangement and operation management use; attaching great importance to the design of commutator stations; adopting reasonable distance between metro stations; making a choice between underground and elevated lines of metro in areas that, out of urban district; optimizing the embedded depth, structural dimension and its constructing schemes of metro tunnels; practically putting into effect the policies that metro equipments should be made in China not less than 70 per cent.
Keywords： metro construction investments reducing
Research and application of safety management dashboard for metro construction
Ding Lieyun,Zhou Ying,Chen Lijuan
Strategic Study of CAE 2011, Volume 13, Issue 8, Pages 67-72
Metro construction safety is affected by many factors,such as engineering geology condition, nearby buildings and engineering design plan, etc.This paper proposes a dashboard tool based on 3D models to control the safety of metro construction. Risk activities and current safety status of the construction can be identified and shown via this dashboard. It can help project managers to figure out the safety status of the construction and risk activities intuitively and timely which improves safety management in metro construction.
Keywords： metro construction safety management dashboard
Research on Combined Construction Technology for Cross-Subway Tunnels in Underground Spaces Article
Xiangsheng Chen
Engineering 2018, Volume 4, Issue 1, Pages 103-111 doi: 10.1016/j.eng.2017.08.001
Given the increasingly notable segmentation of underground space by existing subway tunnels, it is difficult to effectively and adequately develop and utilize underground space in busy parts of a city. This study presents a combined construction technology that has been developed for use in underground spaces; it includes a deformation buffer layer, a special grouting technique, jump excavation by compartment, back-pressure portal frame technology, a reinforcement technique, and the technology of a steel portioning drum or plate. These technologies have been successfully used in practical engineering. The combined construction technology presented in this paper provides a new method of solving key technical problems in underground spaces in effectively used cross-subway tunnels. As this technology has achieved significant economic and social benefits, it has valuable future applications.
Keywords： Operating subway tunnel Underground space Construction Combined technology
A Discussion on Some Critical Issues of Metro Network Planning
Quan Yongshen
Strategic Study of CAE 2000, Volume 2, Issue 4, Pages 75-82
Many cities in China are now experiencing the booming period of metro construction. A critical and urgent problem is how to work out a sound network planning for the metro system before the concrete line implementation. Based on the experiences of metro network planning in China these years, the paper intends to explore some critical issues in this field. That includes the reasoning of the rational scale of the metro system, the spacial form and framework planning and the integration of the metro system with other public transport systems in the city.
Keywords： metro network planning
Simulation of Effect of Forced Ventilated and Smoke Controlled System in Subway Fire Disaster
Cai Bo,Li Huiliang,Liao Guangxuan
Strategic Study of CAE 2005, Volume 7, Issue 8, Pages 80-83
Subway fire disaster is more hazardous than overground fire. Daegu underground railway fire disaster in Korea leads to a disastrous result. By means of fire simulation, recurrence of fire process, fire phenomenon and its reason could be studied. Based on FDS, the distribution of temperature and smoke with or without forced ventilated and smoke controlled system in Daegu subway fire are compared, and the effect on subway fire disaster control is also discussed in this paper.
Keywords： subway fire disaster FDS simulation forced ventilated smoke controlled system
Practice and Research of Subway Environment Control System
Chen Shaozhang,Deng Xianping,He Ligong
Strategic Study of CAE 2006, Volume 8, Issue 10, Pages 75-79
Building subway in subtropics, to reduce the power consumption for air conditioning is a complicated matter . According to the weather characteristics of Guangzhou and the engineering practice in Line 1 GZ Metro, an economic environment control system is established, which applies the Platform Screen Door System and is adapted to subtropic subway for controlling environment.
Keywords： subtropics subway environment control system platform screen door system
The Undersea Tunnel on Qingdao Metro Line 8
Weiguo He, Peng Liu
Engineering 2018, Volume 4, Issue 2, Pages 167-169 doi: 10.1016/j.eng.2018.03.012
Study on Fire Smoke Properties of Subway Station Passageway by Simulation Experiments
Zhu Wei,Lu Ping,Liao Guangxuan,Li Peide,Hong Yixiu
Strategic Study of CAE 2005, Volume 7, Issue 2, Pages 91-96
A series of simulation experiments, carried out on the scale model of subway station passageway are described, in which wood crib fires are used as the evolvement process of subway fire. Temperature relative value is provided to analyze the law of smoke temperature along the station passageway in subway fire and its affecting factors. Based on images collected, the conditions needful for coming into being smoke layer and the applicability of zone model are discussed in the investigation of smoke properties in subway fire. Otherwise, it is also indicated from the results of smoke component measurements that CO concentration at the exit rises with stepwise change.
Keywords： subway fire scale model smoke temperature smoke configuration CO concentration
The Three ‘‘As” of the Naples Metro System
Antonello De Risi
Engineering 2018, Volume 4, Issue 2, Pages 175-179 doi: 10.1016/j.eng.2018.03.013
Ding Lieyun,Zhou Cheng
Strategic Study of CAE 2012, Volume 14, Issue 12, Pages 85-93
One of the most important problems in safety management of metro construction is the insufficient collection and usage of construction safety information, so that the safety control of metro construction is still “in the black box”. Therefore, the presented research applies information technology to safety control of metro construction, which includes: a. For safety risk identification before construction, we proposed a novel approach to automatically identify construction safety risk out of engineering drawings with information technology. Then the safety knowledge of metro construction could be accumulating, sharing and reusing more accurate and effective. b. For risk early-warning during construction, we brought up an approach based on safety risk information fusion and temporal-spatial coupling for metro construction, which is able to effectively identify and track dangerous construction process and locations dynamically. c. For special sections of high risk, we developed the integrated control techniques of automatic monitoring and real-time early-warning for metro construction. The system send any early-warning information to construction workers on site, so that controlling methods and emergency moves can be applied in real time to ensure construction safety. The research achievements are successfully applied in the metro construction in Wuhan, Shenyang, Kunming, Zhengzhou, etc. in China.
Keywords： metro construction safety automatic risk identification information fused early-warning spatial-temper risk coupling real-timing safety control
the subway station and the analysis of the test result
Zhang Jiqing,Suo Xiaoming
Strategic Study of CAE 2010, Volume 12, Issue 12, Pages 18-22
Deformation forecast is proceeded for the structure of Beijing underground diameter side penetrating one station of metro line 2 by numerical value analysis. The comparative analysis and reasons of difference analysis is proceeded too between predicted value and measured value. Deformation prediction results have certain guiding role for engineering construction alike.
Keywords： large diameter shield subway station deformation forecast monitoring numerical value analysis
Numerical and Experimental Study on Ventilation Panel Models in a Subway Passenger Compartment Article
Yu Tao, Mingzhi Yang, Bosen Qian, Fan Wu, Tiantian Wang
Engineering 2019, Volume 5, Issue 2, Pages 329-336 doi: 10.1016/j.eng.2018.12.007
The internal flow field study of car compartments is an important step in railroad vehicle design and optimization. The flow field profile has a significant impact on the temperature distribution and passenger comfort level. Experimental studies on flow field can yield accurate results but carry a high time and computational cost. In contrast, the numerical simulation method can yield an internal flow field profile in less time than an experimental study. This study aims to improve the computational efficiency of numerical simulation by adapting two simplified models—the porous media model and the porous jump face model—to study the internal flow field of a railroad car compartment. The results provided by both simplified models are compared with the original numerical simulation model and with experimental data. Based on the results, the porous media model has a better agreement with the original model and with the experimental results. The flow field parameters (temperature and velocity) of the porous media model have relatively small numerical errors, with a maximum numerical error of 4.7%. The difference between the numerical results of the original model and those of the porous media model is less than 1%. By replacing the original numerical simulation model with the porous media model, the flow field of subway car compartments can be calculated with a reduction of about 25% in computing resources, while maintaining good accuracy.
Keywords： Numerical simulation Experiment Ventilation panel model Subway
Subway rail transit monitoring by built-in sensor platform of smartphone Research Articles
Jian-li Cong, Ming-yuan Gao, Yuan Wang, Rong Chen, Ping Wang,jlcong2019@my.swjtu.edu.cn,gaomingyuan@swu.edu.cn,wangy39@sustech.edu.cn,chenrong@home.swjtu.edu.cn,wping@home.swjtu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 8, Pages 1119-1266 doi: 10.1631/FITEE.1900242
Keywords： 加速度数据；智能监测；内置传感器；智能手机；地铁
Blasting Technologies of Decreasing Vibration in Subway Tunnel Underpass Adjacent Upper Buildings
Fang Junbo
Strategic Study of CAE 2014, Volume 16, Issue 11, Pages 58-64
Reduce the blasting vibration is important for blasting excavation in subway tunnel construction. Take the 3rd bid section of Line 3 of Qingdao subway project for example, the distance between tunnel vault and ground is 5~8m, in order to insure the safety of the upper buildings, technologies of parallel cut with big empty hole, one-time initiation and delay by parts, and multiply short holes were adopted in the project. The results show that the maximum value of vertical vibration limited in the criterion allowance, and the upper buildings was intact. Besides, problems of shock conducting tube detonator delay number difficulty to meet large cross-section tunnel blasting excavation requirements, multiple cross-section can’t initiation simultaneous, and low construction efficiency were solved, which ensure the construction safety and schedule.
Keywords： blasting design parallel cut big empty hole delay- time initiation short- hole blasting
Study of Fire Smoke Flow Characteristics of Horizontal Tunnel Using Longitudinal Ventilation
Lu Ping,Cong Beihua,Liao Guangxuan,Fan Weicheng,Li Peide
Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 59-64
The management of subway tunnel fire smoke is an important component in city public safety. In this paper, on the basis of theoretical analysis of the main factors affecting fire smoke flow in a subway tunnel, the ventilation and exhaust system were considered as a whole and the effects of buoyancy and thermal resistance were introduced. Further, a mathematical model was established to express the relationships between the critical environments, critical velocities, air speeds, smoke speeds and fire intensities. The results can provide instructions for tunnel smoke managements and emergency handling.
Keywords： subway tunnel fire smoke buoyant effect thermal resistance effect critical velocity
Title Author Date Type Operation
Research and application of safety management dashboard for metro construction
Ding Lieyun,Zhou Ying,Chen Lijuan
Journal Article
Research on Combined Construction Technology for Cross-Subway Tunnels in Underground Spaces
Xiangsheng Chen
Journal Article
Simulation of Effect of Forced Ventilated and Smoke Controlled System in Subway Fire Disaster
Cai Bo,Li Huiliang,Liao Guangxuan
Journal Article
Practice and Research of Subway Environment Control System
Chen Shaozhang,Deng Xianping,He Ligong
Journal Article
Study on Fire Smoke Properties of Subway Station Passageway by Simulation Experiments
Zhu Wei,Lu Ping,Liao Guangxuan,Li Peide,Hong Yixiu
Journal Article
Automatic risk identification and safety early-warning of underground construction under complex conditions
Ding Lieyun,Zhou Cheng
Journal Article
Numerical and Experimental Study on Ventilation Panel Models in a Subway Passenger Compartment
Yu Tao, Mingzhi Yang, Bosen Qian, Fan Wu, Tiantian Wang
Journal Article
Subway rail transit monitoring by built-in sensor platform of smartphone
Jian-li Cong, Ming-yuan Gao, Yuan Wang, Rong Chen, Ping Wang,jlcong2019@my.swjtu.edu.cn,gaomingyuan@swu.edu.cn,wangy39@sustech.edu.cn,chenrong@home.swjtu.edu.cn,wping@home.swjtu.edu.cn
Journal Article
Blasting Technologies of Decreasing Vibration in Subway Tunnel Underpass Adjacent Upper Buildings
Fang Junbo
Journal Article
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