Construction Technology of Double-row Supporting Pile in Main Enclosure of Metro Station

2021 ◽  
Keyword(s):  
Construction Technology ◽  
Double Row ◽  
Metro Station

A Practical Method for the Construction of the Supporting System of Covered Excavation of Metro Station

2013 ◽  
Vol 574 ◽  
pp. 151-161
Author(s):  
Bao Jin ◽  
Hai Yun Zhao ◽  
Yang Liu
Keyword(s):  
Practical Method ◽  
Construction Technology ◽  
Optimal Management ◽  
Construction Process ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Metro Station ◽  
Deep Foundation Pit ◽  
Supporting System

This paper proposed a practical construction technology for the supporting system of covered excavation of deep foundation pit enclosure structure in urban subway. With the proposed method, the optimal management of the construction process was carried out in order to alleviate the construction difficulty, and a relative fast construction process was implemented. Finally, the proposed method was successfully applied to the construction of a practical metro station.

scholarly journals Research on Construction Technology of New Type Waterproof Formwork Support System for Metro Station

2019 ◽  
Vol 300 ◽  
pp. 022019
Author(s):  
Wenpeng Dong ◽  
Guang Yang ◽  
Weiqiang Pan ◽  
Zhiqun Pan ◽  
Xiaofeng Fang
Keyword(s):  
Support System ◽  
Construction Technology ◽  
Metro Station ◽  
New Type

scholarly journals A Novel Excavation and Construction Method for an Extra-Long Underwater Tunnel in Soft Soils

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Jian Wu ◽  
Zhifang Zhou ◽  
Wenjun Xia ◽  
Haixiao Wang ◽  
Zhongqiang Fang
Keyword(s):  
Environmental Impact ◽  
Low Cost ◽  
Construction Method ◽  
Construction Technology ◽  
Tunnel Engineering ◽  
Foundation Pit ◽  
Double Row ◽  
Element Analysis ◽  
Underwater Tunnel ◽  
Pass Through

The cut-and-cover technique is widely used in the field of tunnel engineering owing to its simple construction technology, high working efficiency, and low cost. However, the safety of the foundation pit and the environmental impact during excavation are of great concern, especially for tunnels that pass through lakes and/or rivers. In this paper, a novel excavation and construction method is presented for the Taihu tunnel, which is the longest lake-crossing tunnel in China. In this method, a cofferdam of double-row steel sheet piles (DSSPs) was designed in order to divide the overlying excavation into several closed zones. During the construction, four zones were regarded as a unit, and different construction steps were carried out simultaneously in each zone. Therefore, an assembly line for the tunnel excavation was established to accelerate the construction speed. The most distinctive advantage of this method is that the excavation did not cut off the normal flow of the lake water and the shipping routes, with low environmental impact. To investigate the tunnel deformation during excavation, a finite element analysis combined with field monitoring data was adopted, indicating that the magnitude of the tunnel deformation was notably less than those reported from other excavation projects. Moreover, the effect of groundwater on the piles and the safety of the foundation pit was revealed using numerical modelling. This study provides a new idea for the design and construction of tunnel engineering, especially for extra-long underwater tunnels in soft deposits.

The Reconstruction Project of Illumination Devices at the Krasnoselskaya Station of the Moscow Metro

2019 ◽  
pp. 59-66
Author(s):  
Ksenia I. Nechaeva
Keyword(s):  
Cultural Heritage ◽  
Historical Analysis ◽  
Metro Station ◽  
Heritage Sites ◽  
Passenger Transportation ◽  
Fluorescent Lamps ◽  
Current State ◽  
Heritage Site ◽  
Lighting Environment ◽  
Incandescent Lamps

The current state of the Moscow Metro station of the first priority that became operational in 1935 does not allow it to be called a cultural heritage site. This is due to the fact that lighting modernisation carried out by the Moscow Metro was based on fluorescent lamps. Such lamps are more energy efficient compared to incandescent lamps, which were used in original lighting devices specified in the Station Lighting Project developed by architects and designers. However, they significantly changed the station appearance, transforming the originally designed station with entire well visible architectural tectonics?1 from the standpoint of lighting into a simple, flat, unremarkable, and little loaded station of the Moscow Metro./br> This paper describes a method of lighting reconstruction at Krasnoselskaya station by means of original lighting devices that meet modern standards and requirements for cultural heritage sites. The historical analysis on the development of the station lighting environment was conducted during its operation in order to understand what kind of station was conceived by its architects, what changes occurred with its lighting over time, and how it influenced the station appearance and safety of passenger transportation.

On Increasing of the Gain Ratio of Crossed Field Double-Row Amplifiers

2006 ◽  
Vol 65 (8) ◽  
pp. 731-737
Author(s):  
A. V. Gritsunov ◽  
G. G. Kozorezov ◽  
M. A. Kopot
Keyword(s):  
Double Row ◽  
Gain Ratio
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