Abstract:

The most part of the diaphragm walls of Shiziyang tunnel is located in sand and silt layers. In order to prevent the trench wall from collapse, slurry with suitable performance index is adopted after exploration and summary in the practice. In order to improve the trench construction efficiency, trench cutters with hydraulic claw buckets and pile drivers are used for the construction of the 1000mmthick diaphragm walls, which are deeply socked in rock. Good results have been achieved in the construction.

Key words: rocksocked diaphragm wall, slurry wall, trench construction efficiency