Research on the Construction Technology of Filling Clay Core Wall Sand Shell Dam
The combination of"soil first,then reverse"and"reverse first,then soil"construction refers to adjusting and optimizing the compaction process through different forms of anti-seepage structures and different filling sequences.It can reduce the phenomenon of"dog tooth interlocking"in the overlapping area between soil and filter material,and reduce the problem of the design thickness of filter material being encroached upon.At the same time,it can improve the compaction quality of different filling material boundary positions and reduce the damage to the anti-seepage body caused by the"arch effect"formed by natural settlement after dam filling.This method also accelerates the construction progress,reduces the input of construction materials,improves the quality of filling,shortens the construction period,and generates significant economic benefits.
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