A remedial approach to stabilize a deep excavation in Singapore

Ground improvement methods are commonly adopted in deep excavation to minimize wall deflection, wall bending moment and strut force. In this thesis a different approach to the application of ground improvement techniques is analyzed in the form of a parametric study developed with the use of a commercial finite element code. A new remedial ground improvement solution applied to an existing deep excavation located in Singapore and part of the Circle Line Project (CCL) for the construction of a new subway line is considered and computationally modeled. The soil profile in the site mainly consists of deep marine soft clay dated for the most part in the Holocene period, principally characterized by a normally to very low overconsolidation ratio, in some location even underconsolidated. The parametric analysis aims to evaluate short-term effects of the application of cementing agents to the lower portion of the marine clay externally to the excavation side. The effectiveness of the proposed ground improvement is examined using a finite element model corresponding to a key cross-section of CCL1 project.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2007

Author dc:creator

• Ferrari, Alessia Alexandra

Advisor dc:contributor.advisor

• Andrew J. Whittle.

• Civil and Environmental Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/38581

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/38581