Vertical Movement of Pile Groups Caused by Adjacent Large Diameter Shield-Driven Tunneling in Shanghai Soft Clay
This study provides a case history of a large-diameter shield tunnel (D = 15.43 m) in Shanghai soft clay through field measurement and finite element analysis (FEA). Two elevated bridges - Yixian elevated road and Metro Line 3 - were supported by multiple pile groups and multi-crossed by a large-diameter slurry shield machine. The two bridges were first crossed by the shield machine during the south-bound tunneling, and then crossed during the north-bound tunneling by the same shield machine. The minimum clearance between the shield skin and piles is 1 m. Field measurement on the movement of the pile groups during the tunneling process - including the vertical, longitudinal transverse, and lateral transverse displacement - was carried out for both bridges. The finite element (FE) software program, ABAQUS, is used to investigate the movement of the pile groups during the multi-crossing by the slurry shield. A full, three-dimensional FE model is generated without considering upper structures of the two bridges. Most of the relevant factors in tunneling are taken into consideration in the FE models, including: slurry pressure, grouting pressure, grouting material hardening and soil-pile interaction. A modified Cam clay (MCC) model is adopted in simulating the soft clay in Shanghai involved in this tunnel project. The FE results are compared with the field data to provide a better understanding of the disturbance of pile groups caused by the crossing tunneling process.
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Availability:
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Supplemental Notes:
- © 2014 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Liu, C
- Zhang, Z X
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Conference:
- Geo-Shanghai 2014
- Location: Shanghai , China
- Date: 2014-5-26 to 2014-5-28
- Publication Date: 2014-5
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 470-480
- Monograph Title: Tunneling and Underground Construction
Subject/Index Terms
- TRT Terms: Case studies; Finite element method; Highway bridges; Shielding (Tunneling); Soft clays; Support piles; Tunneling; Underground construction
- Identifier Terms: ABAQUS (Computer program)
- Geographic Terms: Shanghai (China)
- Subject Areas: Bridges and other structures; Construction; Highways; I54: Construction of Tunnels;
Filing Info
- Accession Number: 01531627
- Record Type: Publication
- ISBN: 9780784413449
- Files: TRIS, ASCE
- Created Date: Jul 25 2014 4:16PM