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Abstract Based on the diaphragm wall construction of two open-cut metro stations，we study the influence factors of stability of slurry trench sides during diaphragm wall building in soft soil by analyzing the fullness coefficient of slurry trenches corresponding to different controlling parameters. This paper also makes an analysis of distortion position of slurry trench sides by combining ultrasonic test records with concrete rising rate of diaphragm wall in the process of concreting. The analytic result shows that the rates of trench construction and perfusion have impact on the stability of slurry trench sides，yet the construction sequence and the groove depth have little effect on the stability of slurry trench sides if both the quality and the level height of slurry meet the design requirements. The deformation of slurry trench sides mainly happens within the region of 5 m below the guide wall and in the silt sand with clayey soil.
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Received: 03 December 2010
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2011, Vol. 30 
