Construction Of Metro Line Research Articles

Construction of the Metro Line D in Praha-Pankrác: An Introductory Report About a Unique Opportunity for Study of the Upper Ordovician Fossil Assemblages and Sediments in the Prague Basin (Czech Republic)

Abstract The construction of the new metro line D in Praha-Pankrác provides a unique opportunity to study different aspects such as lithology, stratigraphy and fossil assemblages from the Upper Ordovician and Silurian of the Prague Basin. Results from the sections in tunnels mined so far allowed detailed information about the succession of fossil assemblages, facies variability and actual thicknesses of the upper part of the Bohdalec Formation, the Králův Dvůr and Kosov formations in this part of Prague Basin. The stratigraphic position of Michle Facies in the Bohdalec Formation was also indicated.

A Novel Approach for Risk Assessment of Building Damage via Metro Tunnel Construction

The impact of shield construction on the surrounding buildings involves numerous factors, and the factors are uncertain and ambiguous, which have a great impact on the progress and safety of the project. Therefore, this paper developed a systematic approach for the risk assessment of existing buildings adjacent to tunneling excavation. Firstly, a risk assessment system for adjacent buildings in shield tunneling environments was proposed. Secondly, the weighting of factors was calculated by Pythagorean fuzzy AHP. Then, the VIKOR method was used to divide the risk of existing buildings adjacent to tunneling excavation into five uneven levels. Finally, the extended VIKOR with interval numbers was first introduced in risk assessment of building adjacent to tunneling environment to determine a specific building risk level. The proposed approach was successfully applied to the risk assessment of several buildings adjacent to tunnel construction of Metro Line 4 of Changsha. The accuracy and effectiveness of the constructed new approach were verified by comparing the obtained evaluation results with the actual situation on‐site. This work provides a new method for similar engineering risk assessment.

Prediction of Ground Subsidence During Underground Construction of Metro Line 2, Section 1, Ben Thanh - Tham Luong

Urban metro line No. 2 from An Suong station to Thu Thiem is one of the six metro lines thatis planned to be built in Ho Chi Minh City (HCMC). The metro line goes through the area in which thestratigraphy consists of many units, distributed from 20-80 m. The hydrogeology mainly has 2 aquifers,namely Holocene, and Pleistocene which affecting the deep excavation. During construction, there willbe some problems that will affect the work on the surface such as settlement, cracking, and damage. Byfinite element method on Plaxis software, the article forecasts the surface settlement during this metroline No.2. The results show that the ground settlement is relatively large in areas with soft groundstructures. The settlement results depend on the geological structure characteristics, hydrogeologicalcharacteristics, and the shape and size of the tunnels.

Evaluating the Impact of Road Constructions on Oversaturated Intersections: A Simulated-Based Case Study

During the road construction, the road capacity would be affected by the construction activities. Moreover, unreasonable traffic organization in construction area not only aggravate the decline of road capacity, but also greatly affect the operation of surrounding traffic. Thus, it is necessary to optimize the traffic organization with construction activities, including optimize the signal timing scheme of intersections and analyze the impact of construction area design. First, taking the construction of Metro Line 6 in Chengdu, China as the studying case, the signal timing is optimized with the minimization of vehicles delay as the optimization objective. Then, a comprehensive sensitivity analysis of the size of working area and the length of transition area is further performed. The results show that the length of construction working area should be set as short as possible, while the transition area has the least impact on traffic operation when its length is set at 50m ~ 60m. Meanwhile, with the increase of the length of the construction area, the intersection with higher green letter ratio would be less sensitive to the changes.

地铁建设中的接口管理与优化研究

地铁建设管理中接口问题普遍存在，本文利用质量屋模型找出地铁建设过程中接口管理的关键措施，用PBS分解规划接口管理的具体工作，并应用里程碑管理的理念去优化管理接口，确保工程的功能实现和按期完成，降低项目的整体风险，并以上海在建的地铁13号线为例，验证上述措施的有效性。 The interface problems in the management of metro construction commonly exist. This paper uses the house of quality model to find out the key measures of interface management and the PBS to introduce the specific work and apply the milestone management philosophy to optimize the interface management, which ensures the functions realized and the engineering completed on schedule and reduce the overall risk of the project. And at the end of the article, it takes the construction of Metro Line 13 in Shanghai as an example to verify the effectiveness of the above measures.

Dynamic Response Analysis of Xi'an Bell Tower Timber Structure under the Metro-Vibration Loading of Line 2 and 6

The effects of metro line 2 and line 6 on Xi'an Bell Tower was studied by numerical analysis in this paper. At first, according to the theory of Euler-Bernoulli beam in Winkler foundation, the analysis model of train-track-foundation system was established, and then, time-history curve of metro-induced loading acts on tunnel structure is obtained by using Matlab produce platform. Secondly, two-dimensional finite element model of the structure-soil-tunnel interaction model was established using ANSYS. Finally, the impact of metro line 2 and 6 and ground transportation on Xi’an Bell Tower was evaluated according to the Technical specification for protection of historic buildings against man-made vibration. The construction of Metro Line 2 and Line 6 will affect the safety of Xi'an Bell Tower.

The Analysis of Planning Guide Effect of Guangzhou Metro Line Five’s Construction to the Non-Existed Central District of the City

This essay discusses the effect of what the construction of the Metro Line Five of Guangzhou has to the development of existing central district and non-existed central district of Guangzhou City. Through the investigation and research into the quantity change of the public facilities around every exit of Metro Line Five within 500 meters, the essay analyses the planning guide effect of the construction of Metro Line Five to the land development and city construction of Guangzhou.