Ground Collapse in EPB shield TBM site: A case study of railway tunnels in the deltaic region near Nak-Dong River in Korea

2021 ◽  
pp. 104274
Author(s):  
Hoonil Seol ◽  
Dongjin Won ◽  
Jaewon Jang ◽  
Kwang Yeom Kim ◽  
Tae Sup Yun
Keyword(s):  
Ground Collapse ◽  
Epb Shield

scholarly journals Compound Karst Cave Treatment and Waterproofing Strategy for EPB Shield Tunnelling in Karst Areas: A Case Study

2021 ◽  
Vol 9 ◽  
Author(s):  
Yongshui Kang ◽  
Zhi Geng ◽  
Linhai Lu ◽  
Lei Chen ◽  
Xuewei Liu ◽  
...  
Keyword(s):  
Water Inrush ◽  
Earth Pressure ◽  
Karst Area ◽  
Karst Cave ◽  
Karst Caves ◽  
Ground Collapse ◽  
Karst Areas ◽  
Shield Tunnelling ◽  
Epb Shield

There is high risk of water inrush and ground collapse accidents when tunnelling in karst areas. Based on the case study of an urban metro tunnel, this paper focuses on karst cave treatment and waterproofing strategies for earth pressure balancing (EPB) shield tunnelling in karst areas containing large amounts of karst caves and fissures. When the shield machine enters the karst area, water gush easily occurs, posing serious threats to tunnelling safety. The distribution characteristic of limestone fractures, karst caves, and fissures in the karst area were analyzed according to the geological survey results. Further, water inrush risk and engineering difficulties were analyzed. Subsequently, a compound karst cave treatment and waterproofing strategy for EPB shield tunnelling was proposed and implemented. Water inflow is successfully reduced and ground collapse accident is avoided using the compound karst cave treatment and waterproofing strategy.

Investigation of a large ground collapse, water inrush and mud outburst, and countermeasures during subway excavation in Qingdao: A case study

2021 ◽  
Vol 117 ◽  
pp. 104127
Author(s):  
Feiyue Yan ◽  
Wenge Qiu ◽  
Keguo Sun ◽  
Shuhua Jiang ◽  
Haiyun Huang ◽  
...  
Keyword(s):  
Water Inrush ◽  
Ground Collapse

Investigation of a large ground collapse and countermeasures during mountain tunnelling in Hangzhou: a case study

2017 ◽  
Vol 78 (2) ◽  
pp. 991-1003 ◽  
Author(s):  
Ning Zhang ◽  
Jack Shuilong Shen ◽  
Cheng Lin ◽  
Arul Arulrajah ◽  
Jin-Chun Chai
Keyword(s):  
Ground Collapse

scholarly journals Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction

SpringerPlus ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Xinggao Li ◽  
Dajun Yuan ◽  
Yuhai Guo ◽  
Zhiyong Cai
Keyword(s):  
Subway Construction ◽  
Epb Shield ◽  
Beijing Subway

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

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