Soil conditioning for EPB tunnelling in coarse grained soils based on laboratory model tests

被引：0
|
作者：
Merritt, A. S. [1 ]
Jefferis, S. A. [2 ]
Storry, R. B. [3 ]
机构：
[1] Pells Sullivan Meynink, Sydney, NSW, Australia
[2] Environm Geotech Ltd, Banbury, England
[3] Bouygues Construct, Melbourne, Vic, Australia
来源：
GEOTECHNICAL ASPECTS OF UNDERGROUND CONSTRUCTION IN SOFT GROUND | 2021年
关键词：
D O I：
10.1201/9780429321559-104
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Earth Pressure Balance (EPB) tunnel boring machines (TBMs) are commonly used for tunnel construction in soft ground. Their application range has been extended through the use of soil conditioning to improve tunnel face stability and control of spoil flow through the TBM and screw conveyor. Effective conditioning is challenging for coarse grained soils, particularly with significant groundwater pressures. This paper presents results from laboratory tests undertaken with a model EPB screw conveyor on coarse grained soil samples with a range of gradings, conditioned with foam, polymers and fines addition. The tests modelled the EPB excavation process to assess the performance of different conditioning treatments. The results provide experimental support for published guidance on EPB TBM application ranges and conditioning requirements, and demonstrate the potential to expand the application range through the use of specialised water absorbent polymer conditioning treatments.
引用
收藏
页码：788 / 795
页数：8
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