Jet Grouting Soft Clays for Tunnelling and Deep Excavations—Design and Construction Issues

Combined with a specific foreign-related project and based on the detailed report of the engineering geological investigation, this paper describes the application of the selected support structures of shotcrete-bolt and bored piles with high pressure rotary jet grouting waterproof curtain from aspects of scheme optimizing, design and construction, underground watertable lowering and result monitoring. Satisfactory achievements have been made in cost saving, shortening duration, facilitating construction and environmental protection etc. It demonstrates that two or multiple support systems can be used simultaneously in one foundation pit as support structure.

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Risk Control in the Deep Excavations with the Application of the Observational Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3403 ◽

2011 ◽

Vol 243-249 ◽

pp. 3403-3410

Author(s):

Jian Qin Ma

Keyword(s):

Risk Control ◽

Observational Method ◽

Deep Excavation ◽

General Process ◽

Deep Excavations ◽

Rapid Deterioration ◽

Design And Construction

The uncertainty of the ground, in which a deep excavation to be conducted, is always inherent. The risk control of the excavation is therefore necessary. Based on the principle features of a deep excavation, a general process of risk control is presented in terms of design and construction, with the application of the observational method. To avoid the conflicts of the involved groups’ interests, a close co-operation between the groups in a well planned procedure is vital to the success of the risk control, especially to the case with rapid deterioration stages included.

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Chapter 13 Use of jet grouting in deep excavations

Ground Improvement — Case Histories - Elsevier Geo-Engineering Book Series ◽

10.1016/s1571-9960(05)80016-3 ◽

2005 ◽

pp. 357-370 ◽

Cited By ~ 2

Author(s):

Dazhi Wen

Keyword(s):

Deep Excavations ◽

Jet Grouting

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Design and construction of deep excavations in Shanghai

Geotechnical Aspects of Underground Construction in Soft Ground ◽

10.1201/b12748-91 ◽

2012 ◽

pp. 685-702

Keyword(s):

Deep Excavations ◽

Design And Construction

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Improving Deep-Seated Soft Clays Using Super-Jet Grouting

Grouting and Ground Treatment ◽

10.1061/40663(2003)119 ◽

2003 ◽

Author(s):

H. Senapathy ◽

J. R. Davie ◽

D. Boehm

Keyword(s):

Soft Clays ◽

Jet Grouting

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Live coal storage structure, Genesee Generating Station

Canadian Journal of Civil Engineering ◽

10.1139/l90-114 ◽

1990 ◽

Vol 17 (6) ◽

pp. 1033-1043

Author(s):

C. E. Chan ◽

R. L. Martin ◽

D. Weinreb ◽

D. R. Trowsdale

Keyword(s):

Monitoring Program ◽

Earth Pressure ◽

Field Measurements ◽

Basic Design ◽

Storage Structure ◽

Soft Clays ◽

Construction Methods ◽

Reinforced Earth ◽

Overall Stability ◽

Design And Construction

The development, by Edmonton Power, of the Genesee Generating Station has necessitated construction of a 40 000-t live coal storage structure. The live storage is a 170 m long coal slot based 17 m below grade. It comprises a concrete U box and inclined reinforced earth sidewalls. The site is underlain by soft clays, which posed special problems for design and construction. Analytical and construction methods were developed to suit the geotechnical and site constraints. A monitoring program was instituted during construction to verify the design assumptions and to confirm the overall stability. This paper reviews the decisions involved in the basic design of the structure, and methods of dealing with design and construction problems. Key words: excavation, struts, earth pressure, reinforced earth, field measurements.

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