Creating a working space for modifying and maintaining the cutterhead of a large-diameter slurry shield: A case study of Beijing railway tunnel construction

2018 ◽  
Vol 72 ◽  
pp. 73-83 ◽  
Author(s):  
Xinggao Li ◽  
Dajun Yuan
Keyword(s):  
Large Diameter ◽  
Tunnel Construction ◽  
Railway Tunnel ◽  
Working Space ◽  
Slurry Shield

TUNNEL CONSTRUCTION IN PIR PANJAL (HIMALAYA) USING NATM [CASE STUDY T-74R RAILWAY TUNNEL OF KATRA-BANIHAL SECTION OF KASHMIR RAIL PROJECT]

2016 ◽  
Vol 6 (1) ◽  
pp. 48
Author(s):  
Bukhari Syed Kaiser ◽  
Dar Ayaz Mohmood ◽  
Yousuf Maqboo ◽  
◽  
◽  
...  
Keyword(s):  
Tunnel Construction ◽  
Railway Tunnel

Key Construction Technologies for Large River-Crossing Slurry Shield Tunnel: Case Study

2021 ◽  
Vol 34 (2) ◽  
pp. 04020118
Author(s):  
Song Zhou ◽  
Guan-Lin Ye ◽  
Lei Han ◽  
Wang Jian-Hua
Keyword(s):  
Large River ◽  
Shield Tunnel ◽  
Slurry Shield

A CASE STUDY FOR EXAMINATION OF EFFECTIVENESS OF THE SAFEGUARDING SUPPORTIVE SYSTEM AT A TUNNEL CONSTRUCTION SITE

2019 ◽  
Vol 75 (2) ◽  
pp. I_99-I_107
Author(s):  
Shoken SHIMIZU ◽  
Junichiro YONETAKE ◽  
Takahiko SHOBU ◽  
Makoto IMAI ◽  
Shinichi YAMAMOTO ◽  
...  
Keyword(s):  
Tunnel Construction ◽  
Construction Site

Thinning in mature eastern white pine: 43-year case study

2002 ◽  
Vol 78 (4) ◽  
pp. 539-549 ◽  
Author(s):  
Paul D Anderson ◽  
John C Zasada ◽  
Glen W Erickson ◽  
Zigmond A Zasada
Keyword(s):  
Genetic Diversity ◽  
Dna Analysis ◽  
Large Diameter ◽  
White Pine ◽  
Thinning Intensity ◽  
Pine Regeneration ◽  
Volume Production ◽  
Pine Stands ◽  
Over Time

A white pine (Pinus strobus L.) stand at the western margin of the species range, approximately 125 years of age at present, was thinned in 1953 from 33.5 m2 ha-1 to target residual basal areas of 18.4, 23.0, 27.5, and 32.1 m2 ha-1 . Repeated measurement over the following 43-years indicated that the greatest total volume production and the greatest number of large diameter trees occurred in the unit of highest residual density. Over time, the distribution of stems was predominantly random although mortality between 1979 and 1996 resulted in a tendency for clumping in the 23.0 and 27.5 m2 ha-1 treatments. DNA analysis indicated that thinning intensity had little effect on the genetic diversity of residual white pine. This study suggests that mature white pine stands in northern Minnesota may be managed at relatively high densities without loss of productivity. However, regardless of overstory density, there was little or no white pine regeneration occurring in this stand. Key words: thinning, growth, genetic diversity, molecular markers, spatial pattern, regeneration

Continuous Belt Mucking Technology of China Railway Tunnel Construction

2012 ◽  
Vol 268-270 ◽  
pp. 664-672
Author(s):  
Ya Ting Sun ◽  
Zhi Rong Mei ◽  
Jun Wei Zhang
Keyword(s):  
Conservation Policy ◽  
The Other ◽  
Tunnel Construction ◽  
Frozen Ground ◽  
Railway Tunnel ◽  
Scheme Design ◽  
Construction Methods ◽  
Comprehensive Benefit ◽  
Equipment Configuration ◽  
Blasting Method

The conventional mucking system of tunnel construction in China has a series of deficiencies and stubborn problems. Tunnel mucking technologies matched with different tunnel construction methods have been analyzed systematically and the continuous belt mucking methodology which is appropriated with drilling-blasting method was presented. The continuous belt mucking technology includes mucking scheme design and mucking equipment configuration. Compared with the conventional mucking methods, the comprehensive benefit can be fully demonstrated by the new continuous belt mucking system. On the other hand, the predominance on environmental protection of the continuous belt mucking technoloty matches up with the conservation policy. The technology would be widely applied in long tunnels and tunnels embedded in frozen ground and located in bitter cold plateau. The economic benifis and contribution to society of continuous belt mucking technology would be remarkable.

Case study: conservation and restoration of a pair of large diameter English globes

2015 ◽  
Vol 38 (1) ◽  
pp. 77-91
Author(s):  
T.K. McClintock ◽  
Lorraine Bigrigg ◽  
Deborah LaCamera
Keyword(s):  
Large Diameter

scholarly journals Observations of Ground Movements during Tunnel Construction by Slurry Shield Method at the Docklands Light Railway Lewisham Extension—East London

1999 ◽  
Vol 39 (3) ◽  
pp. 99-112 ◽  
Author(s):  
Tadashi Sugiyama ◽  
Toshiyuki Hagiwara ◽  
Toshi Nomoto ◽  
Masaaki Nomoto ◽  
Yutaka Ano ◽  
...  
Keyword(s):  
Tunnel Construction ◽  
Ground Movements ◽  
Slurry Shield
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