Abstract Along the Yangtze River, it is challenging to construct a deep foundation pit due to widely distributed and thick muddy soil, a high confined water level, and complex geological conditions. In this paper, based on the Meizizhou river-crossing passage of the Nanjing YOG transportation axis project, a tri-axial soil-mixing pile retaining structure constructed using the SMW method is studied systematically. By combining data from the field piling test and the laboratory experiment, main construction technology parameters, like water cement ratio, cement content, drilling speed, and lifting speed, are determined and the displacement law of the SMW retaining structure is analyzed in light of field test results. Engineering practices show that the SMW retaining structure has a good supporting effect under the above geological conditions, and this paper provides a reference for the construction of retaining structures for large-scale, deep foundation pits.
Abstract：
Along the Yangtze River, it is challenging to construct a deep foundation pit due to widely distributed and thick muddy soil, a high confined water level, and complex geological conditions. In this paper, based on the Meizizhou river-crossing passage of the Nanjing YOG transportation axis project, a tri-axial soil-mixing pile retaining structure constructed using the SMW method is studied systematically. By combining data from the field piling test and the laboratory experiment, main construction technology parameters, like water cement ratio, cement content, drilling speed, and lifting speed, are determined and the displacement law of the SMW retaining structure is analyzed in light of field test results. Engineering practices show that the SMW retaining structure has a good supporting effect under the above geological conditions, and this paper provides a reference for the construction of retaining structures for large-scale, deep foundation pits.
LI Ai-Di,
LI Cheng-Xun,
DONG Ying
.Research on Construction Techniques for an SMW Retaining Structure for
a Deep Foundation Pit in Soft Muddy Soil
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(5): 180-186
2014, Vol. 51 