Paper Title:
Study on Gas Permeability Test in Water Sand and Gravel Stratum
  Abstract

Water sand and gravel stratum is characterized by high gravel content, big grain size and high strength, easy permeation for water and air, brittleness and hysteresis quality in stratum failure, causing great difficulties in EPBM hyperbaric intervention and changing cutter tools working under air pressure. Due to the special geological conditions and no useful reference or criterion about gas permeability in such stratum all over the world, gas permeability test is done to fetch air loss data in natural state and bentonite-added state.Based on the practical situation of ChengDu Metro Line 1-Lot 3 project, by using methods of site test and theoretical analysis,the air loss before/after bentonite is added are given: At the air pressure of 1.0 bar, the air loss with bentonite added is 27% of that without bentonite. The acreage of pressure air loss around excavation face is from 35.2 m2 (In case of half chamber muck and bentonite slurry is 100% in effect around shield machine) to 129.6m2 (In case of empty chamber and bentonite slurry is 50% in effect around shield machine), providing reference in choosing air compressor, also for other project in this stratum and similar project.

  Info
Periodical
Chapter
Chapter 6: Frontiers of Manufacturing and Design
Edited by
Dongye Sun, Wen-Pei Sung and Ran Chen
Pages
3407-3410
DOI
10.4028/www.scientific.net/AMM.71-78.3407
Citation
H. Hu, W. G. Qiu, "Study on Gas Permeability Test in Water Sand and Gravel Stratum", Applied Mechanics and Materials, Vols. 71-78, pp. 3407-3410, 2011
Online since
July 2011
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xiang Ming Zheng, Jie Hu
Abstract:Assembly performance test bed is an indispensable equipment in the development and production of air compressor assembly. The test bed...
1874
Authors: Xu Han, Yong Li, Ying Xin Liu
Chapter 5: HVAC, Air Conditioning and Refrigeration
Abstract:Air purifier was used more and more widely, its placement and characteristics of indoor air have a significant impact on the efficiency of...
1240
Authors: Shuanghua Cao, Zhiliang Lou, Leheng Wang, Minsi Li
Chapter 11: Heating, Gas Supply, Ventilation and Air Conditioning Works
Abstract:The building air permeability plays a major role in both building energy performance and indoor air quality. The performance of structural...
2142
Authors: Long Fei Yan, Min Xiao, Shi Hong Zhang
Chapter 4: Related Themes
Abstract:Because exhaust gas of the natural gas catalytic combustion is clean and sterile, the exhaust gas can be used in aseptic boxes,...
1172
Authors: Zhi Yang Yuan
Chapter 2: Research on Manufacturing Process and Engineering Management of Manufacturing Systems
Abstract:The ground-source heat pump is a system which takes the shallow surface soil energy as the source of heating and cooling. The temperature of...
433