3D Numerical modelling of tunnelling intersecting piles

被引：0
|
作者：
Lee, S. W. [1 ]
Choy, C. K. M. [1 ]
Tse, S. C. [1 ]
van Gool, F. R. [2 ]
Cheang, W. W. L. [2 ]
Brinkgreve, R. B. J. [2 ]
机构：
[1] Geotech Consulting Grp Asia Ltd, Hong Kong, Hong Kong, Peoples R China
[2] Delft Univ Technol, Plaxis BV, Delft, Netherlands
来源：
GEOTECHNICAL ASPECTS OF UNDERGROUND CONSTRUCTION IN SOFT GROUND, 7TH INTERNATIONAL SYMPOSIUM | 2012年
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D O I：
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中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Tunnelling beneath existing buildings supported by large numbers of piles is a three-dimensional (3D) soil-structure interaction problem. 3D finite element analyses (FEA) have been carried out to model construction of a 6 m diameter tunnel intersecting the lower portion of a building piled foundation system comprising 50 nos. of 0.6 m diameter, 21.5 m long friction piles. A total of 15 obstructing pile toes are cut off. A step-by-step pressure method is used to model the progressive advance of tunnelling. Two parametric study analyses are carried out to investigate the effects of the upper half of and a full 3 m thick grouted annulus around the tunnel. Results are presented for the responses of selected piles and building settlements. Both grouting schemes are found to be effective in reducing tunnelling-induced ground movements.
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页码：919 / 925
页数：7
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